1
|
Si R, Luo H, Pu J. Construction of wood-PANI supercapacitor with high mass loading using "pore-making, active substance-filling, densification" strategy. J Colloid Interface Sci 2024; 662:58-68. [PMID: 38335740 DOI: 10.1016/j.jcis.2024.02.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Revised: 01/20/2024] [Accepted: 02/01/2024] [Indexed: 02/12/2024]
Abstract
Wood-conducting polymer materials have been widely used as supercapacitor electrode; however, it remains challenging to achieve a simple method to improve the homogeneity of the conductive material on wood and to reach high mass loading. Herein, a novel "pore-making, active substance-filling, densification (dissolution, in-situ polymerization of polyaniline (PANI), self-shrinking)" strategy is proposed for the preparation of wood electrodes with a high mass loading (41.4 wt%) and homogeneity. Ingeniously, ZnCl2 as a dissolving agent and pore-making agent to treat delignified wood can generate more pores on the wood, which is more conducive to the penetration of aniline small molecules, besides, the dissolved fine fibers can be entangled with more PANI, which can improve the loading and homogeneity of PANI. After drying treatment, there will be shrinkage again, playing a certain physical densification effect on the large lumen. The optical electrode was RWP2 showing high electrochemical performance (2328.9 mF/cm2, 1 mA/cm2), and stability (5000 cycles, 89.3 %). Moving forward, the RWP2//RWP2 SSC showed an excellent energy density of 164.24 μwh/cm2 at a power density of 250 μw/cm2. Remarkably, the simple and versatile strategy of designing wood-based materials with high mass loading provides new research ideas for realizing multifunctional applications.
Collapse
Affiliation(s)
- Rongrong Si
- Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, China.
| | - Honggang Luo
- Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China; University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Junwen Pu
- Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, China.
| |
Collapse
|
2
|
Alaoui Mansouri M, Kharbach M, Bouklouze A. Current Applications of Multivariate Curve Resolution-Alternating Least Squares (MCR-ALS) in Pharmaceutical Analysis: Review. J Pharm Sci 2024; 113:856-865. [PMID: 38072117 DOI: 10.1016/j.xphs.2023.12.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 12/04/2023] [Accepted: 12/04/2023] [Indexed: 12/22/2023]
Abstract
The present review encompasses various applications of multivariate curve resolution- alternating least squares (MCR-ALS) as a promising data handling, which is issued by analytical techniques in pharmaceutics. It involves different sections starting from a concise theory of MCR-ALS and four detailed applications in drugs analysis. Dissolution, stability, polymorphism, and quantification are the main four detailed applications. The data generated by analytical techniques associated with MCR-ALS deals accurately with different challenges compared to other chemometric tools. For each reviewed purpose, it was explained how MCR-ALS was applied and detailed information was given. Different approaches were introduced to overcome challenges that limit the use of MCR-ALS efficiently in pharmaceutical mixture were also discussed.
Collapse
Affiliation(s)
- Mohammed Alaoui Mansouri
- Nano and Molecular Systems Research Unit, University of Oulu, FI-90014 Oulu, Finland; University of Liege (ULiege), CIRM, Vibra-Santé HUB, Laboratory of Pharmaceutical Analytical Chemistry, CHU, B36, B-4000, Liege, Belgium.
| | - Mourad Kharbach
- Research Unit of Mathematical Sciences, University of Oulu, FI-90014 Oulu, Finland.
| | - Abdelaziz Bouklouze
- Bio-Pharmaceutical and Toxicological Analysis Research Team, Laboratory of Pharmacology and Toxicology, Faculty of Medicine and Pharmacy, University Mohammed V, Rabat, Morocco
| |
Collapse
|
3
|
Liu Y, Zhang P, Lei P, Jin Y, Yu H, Zhang X, Pan Y, Ou C, Fu T. Modulation of the dissolution with ASP from a supersaturated solution on a bionic platform for gout pathology crystals. Colloids Surf B Biointerfaces 2024; 236:113803. [PMID: 38367289 DOI: 10.1016/j.colsurfb.2024.113803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 02/08/2024] [Accepted: 02/13/2024] [Indexed: 02/19/2024]
Abstract
The core to the treatment of gout is the elimination of pathologic crystal, monosodium urate monohydrate (MSUM). The primary treatment available is to gradually dissolve the "culprit crystals" by lowering the blood uric acid concentration with medications, which often takes a long time and in severe cases must still be treated surgically. Herein, we developed a dynamic bionic platform based on a hydrogel composite membrane (HCM) to screen the direct facilitated solubilization of MSUM crystals by small organic molecules in bionic saturated, or even supersaturated, solutions. The customized and biologically safe (NAGA/PEGDA/NIPAM) HCM, which is consistent with the main amino acid composition of articular cartilage, well mimics the entire process of organic molecules leading to the dissolution of MSUM crystals in the joint system. With the verifications of this platform, it is shown that l-aspartic acid (ASP) significantly promotes the dissolution of MSUM crystals not only in saturated but also in supersaturated solutions. Furthermore, a novel mechanism called "crane effect" was used to explain this "dissolution effect" of ASP on MSUM, which stems from the ability of ASP to lock onto the surface of MSUM crystals through hydrogen bonding by virtue of its two carboxyl groups, and simultaneously its amino group lifts the uric acid molecules from the surface of MSUM crystals by virtue of interactions of hydrogen bonding. The results of bulk crystallization, scanning electron microscopy (SEM), powder X-diffraction (PXRD), and density-functional theory (DFT) studies are quantitatively consistent with this hypothetical "crane effect" mechanism. Hence, this HCM-based functional platform could provide entirely novel ideas and methods for drug design and screening for the treatment of pathological crystal diseases of gout.
Collapse
Affiliation(s)
- Yonghai Liu
- School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210046, PR China.
| | - Pengfei Zhang
- School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210046, PR China
| | - Peiyun Lei
- School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210046, PR China
| | - Yige Jin
- School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210046, PR China
| | - Haoting Yu
- School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210046, PR China
| | - Xingde Zhang
- School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210046, PR China
| | - Yonglan Pan
- School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210046, PR China
| | - Chunyan Ou
- School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210046, PR China
| | - Tingming Fu
- School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210046, PR China
| |
Collapse
|
4
|
Li T, Liu F, Jia Z, Luo F, Yan T, Zheng W. Dissolution of mixed oxide(MOX) fuel in nitric acid:A review. Heliyon 2024; 10:e27502. [PMID: 38515662 PMCID: PMC10955325 DOI: 10.1016/j.heliyon.2024.e27502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 02/24/2024] [Accepted: 02/27/2024] [Indexed: 03/23/2024] Open
Abstract
The fast neutron reactor is an internationally promising fourth-generation reactor. The main fuel for this reactor is a mixed oxide fuel, and its reprocessing is currently one of the technical challenges being tackled by various countries. One of the difficulties in the reprocessing of mixed oxide (MOX) fuel lies in the nitric acid dissolution process. The high Pu content in MOX fuel can lead to issues such as solvent radiolysis, nuclear criticality, increased insoluble residues, and slow dissolution rates during the nitric acid dissolution process. These challenges have yet to be effectively addressed. This article discusses the chemical aspects of nitric acid dissolution of MOX fuel and investigates the impact of fuel manufacturing processes, the addition of metal catalyst ions, hydrofluoric acid addition, fuel plutonium content, dissolution temperature, and ultrasonic assistance on the nitric acid dissolution of MOX fuel. A review of various countries' engineering practices related to MOX fuel dissolution is presented. Based on the research findings and experiences, a potentially feasible future industrial processing route for MOX fuel is proposed, and future research priorities are outlined.
Collapse
Affiliation(s)
- Tianchi Li
- China Institute of Atomic Energy, P. O. Box 275 (26) Beijing 102413, China
| | - Fang Liu
- China Institute of Atomic Energy, P. O. Box 275 (26) Beijing 102413, China
| | - Zhou Jia
- China Institute of Atomic Energy, P. O. Box 275 (26) Beijing 102413, China
| | - Fangxiang Luo
- China Institute of Atomic Energy, P. O. Box 275 (26) Beijing 102413, China
| | - Taihong Yan
- China Institute of Atomic Energy, P. O. Box 275 (26) Beijing 102413, China
| | - Weifang Zheng
- China Institute of Atomic Energy, P. O. Box 275 (26) Beijing 102413, China
| |
Collapse
|
5
|
Samadhiya A, Bhunia D, Chakraborty S, Lahoti M. Influence of activator ratios and concentration on the physio-mechanical and microstructural characteristics of the geopolymers derived from sandstone processing waste. Environ Sci Pollut Res Int 2024:10.1007/s11356-024-33019-0. [PMID: 38526714 DOI: 10.1007/s11356-024-33019-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Accepted: 03/16/2024] [Indexed: 03/27/2024]
Abstract
Natural stones have been utilized to meet various needs of human civilization since ancient times. The exploitation of any resource is associated with the production of redundant materials called wastes. Sandstone waste (SW) is one such waste obtained during the industrial processing of sandstones. Due to its siliceous composition, extensive yield, and disorganized dumping, noxious conditions related to land and human health are promoted. However, the lack of comprehensive engineering studies, mineralogical analysis, and design methodologies associated with the utilization of sandstone processing wastes restricted their applicability only to fillers or partial substitutes with pozzolans and traditional cement in meager volumes. In the past, limited efforts have been made to utilize SW as a construction entity, particularly for binding purposes. Thus, to enhance the scope of its utilization, a comprehensive investigation has been performed in this research to transform sandstone waste into a novel construction material by geopolymerization. Mix design tailoring and laboratory tests were implemented to understand the effects of sodium hydroxide concentration and sodium silicate to sodium hydroxide ratio on the dissolution and physio-mechanical characteristics of SW-based geopolymers. The activator-to-binder ratio was restricted to 0.4 to obtain pastes with sufficient workability without hindering the properties of the matrix. Besides, a high temperature-curing regime was selected based on SW's crystallographic and reactivity analysis. Subsequently, a total of 48 samples were prepared and tested at the curing age of 28 days. Detailed characterization of SW and SW-based geopolymer samples was performed using optical, X-ray, and infrared spectroscopies aided by electron imaging and thermogravimetric techniques. SW-based geopolymer samples showed compressive strengths in the range of 6-12 MPa, ~2 to 3 times higher than those obtained in previous experimentations. Phase analysis and microstructural examinations confirmed SW's participation in geopolymerization. Overall, it could be advocated that geopolymerization is an innovative approach for solving issues related to the disposal and re-utilization of SW, extending its possible application to the fields of cement mixes, wall tiles, mortars, and masonry as per the commendations of ASTM and ACI committee.
Collapse
Affiliation(s)
- Akash Samadhiya
- Department of Civil Engineering, Birla Institute of Technology and Science, Pilani, Rajasthan, 333031, India
| | - Dipendu Bhunia
- Department of Civil Engineering, Birla Institute of Technology and Science, Pilani, Rajasthan, 333031, India.
| | - Sayantan Chakraborty
- Department of Civil Engineering, Birla Institute of Technology and Science, Pilani, Rajasthan, 333031, India
| | - Mukund Lahoti
- Department of Civil Engineering, Birla Institute of Technology and Science, Pilani, Rajasthan, 333031, India
| |
Collapse
|
6
|
Oktay AN, Polli JE. Efficiency of single pharmaceutical surfactants to mimic intestinal biorelevant media solubilization and dissolution of etravirine: Comparison of intrinsic and film dissolution models. Eur J Pharm Sci 2024; 196:106746. [PMID: 38499112 DOI: 10.1016/j.ejps.2024.106746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Revised: 02/18/2024] [Accepted: 03/08/2024] [Indexed: 03/20/2024]
Abstract
We understand that quality control dissolution media may best anticipate in vivo product performance by mimicking in vivo media, but preferably involve at most a single pharmaceutical surfactant for routine laboratory use. The objective here was to estimate the concentrations of six pharmaceutical surfactants to mimic etravirine solubility and intrinsic dissolution rate, as well as dissolution rate from a film model, in each Fed State Simulated Intestinal Fluid Version 2 (FeSSIF-V2) and Fasted State Simulated Intestinal Fluid Version 2 (FaSSIF-V2). Solubility studies and colloid sizing measurements were conducted. Results indicate that all six surfactants were more efficient than FeSSIF-V2 or FaSSIF-V2 at solubilizing drug, and also exhibited higher micelle diffusivities than FeSSIF-V2 and FaSSIF-V2 mixed-micelles. The rank-order potency (on mM basis) of the six pharmaceutical surfactants to mimic etravirine solubility in each FeSSIF-V2 and FaSSIF-V2 was: polysorbate 80 (PS80) > polysorbate 20 (PS20) > polyoxyethylene(23) lauryl ether (POE23) > POE10 > hexadecyltrimethylammonium bromide (HEX) > sodium lauryl sulfate (SLS). This rank-order potency was almost the same to mimic drug dissolution rate into each FeSSIF-V2 and FaSSIF-V2, except POE10 > POE23. For the most potent surfactant, PS80, 0.461 mM and 0.140 mM PS80 was estimated to mimic etravirine's solubility and dissolution rate into FeSSIF-V2, respectively, using the intrinsic dissolution model. The low PS80 concentration to mimic dissolution rate reflects the relatively high diffusivity of PS80 micelles, compared to FeSSIF-V2 mixed-micelle diffusivity, which was the case for all six pharmaceutical surfactants. Results are also presented in terms of a film dissolution model for surfactant-mediated dissolution, where dissolution enhancement was less than that in the intrinsic dissolution model, and the film model required lower surfactant concentration than in intrinsic dissolution model to mimic FeSSIF-V2-enhanced dissolution. Findings have promised to identify single pharmaceutical surfactant concentrations that mimic key performance attributes of biorelevant media.
Collapse
Affiliation(s)
- Ayse Nur Oktay
- Department of Pharmaceutical Sciences, University of Maryland, 20 Penn Street, Baltimore, MD 21201, USA; Gulhane Faculty of Pharmacy, Department of Pharmaceutical Technology, University of Health Sciences, Ankara, Turkey
| | - James E Polli
- Department of Pharmaceutical Sciences, University of Maryland, 20 Penn Street, Baltimore, MD 21201, USA.
| |
Collapse
|
7
|
Toukabri I, Bahri S, Sfar S, Lassoued MA. Impact of crystal polymorphism of rifaximin on dissolution behavior. Heliyon 2024; 10:e27131. [PMID: 38449665 PMCID: PMC10915558 DOI: 10.1016/j.heliyon.2024.e27131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 02/23/2024] [Accepted: 02/23/2024] [Indexed: 03/08/2024] Open
Abstract
Introduction Rifaximin is an intestinal antiseptic which has five (pseudo) polymorphs α, β, γ, δ and ε. These last (pseudo)polymorphs have different physicochemical properties. The objective of the study is to assess the impact of rifaximin polymorphism on its dissolution rate which could affect its bioavailability. Material and methods The analytical validation of dissolution assay method by UV-Visible spectrophotometry was carried out according to ICH Q2. The physicochemical characterization (solubility test, FTIR, DSC, XRD) was carried out on four active pharmaceutical ingredient (MP1, MP2, MP3, MP4). MP1 and MP2 were used by the manufacturer of generic brand 1 (G1) and MP3 and MP4 were used by the manufacturer of generic brand 2 (G2). The comparative in-vitro dissolution study was carried out on the leader brand (P), G1 and G2. Results The four MPs were analyzed by XRD. The results of analysis showed that MP1 and MP4 were a mixture of α form and amorphous form. MP2 had an amorphous form and MP3 had a crystalline form β. The spectra of FTIR showed that the four MP had characteristics bands of rifaximin in the domain 4000-400 cm-1. The differences between the spectra of the four MPs were observed among the amorphous form (MP2), around the region 1800 to 1820 cm-1 which is attributed to the vibration of the CO group. An additional difference observed among the amorphous form (MP2) is around the region 1400 cm-1 which is attributed to the banding OH. The thermograms of MP1, MP2 and MP4 showed endothermic peaks which are probably attributed to the departure of water which indicate that MP1, MP2 and MP4 are pseudopolymoph (hydrate). For the four MPs, probably the melting points are interrupted by the phenomenon of phase transformations (Crystallization) which are reflected by exothermic peaks around 200°C-250 °C.Our results showed that the crystalline polymorphism of rifaximin influences its solubility. According to the results of the solubility test, the β crystal form of rifaximin (MP3) had the lowest solubility (3.47 μg/ml). MP2 had the highest solubility (8.35 μg/ml) and MP1 and MP4 had intermediate solubilities (5.47 μg/ml and 6.74 μg/ml). Comparative in vitro dissolution results showed that the dissolution profile of P was not similar to that of G1 and G2 (% dissolution (P)30min = 60%; % dissolution (G1) 30 min = 100% and % dissolution (G2) 30 min = 115%; f1(P versus G1) = 44; f1(P versus G2) = 61) in M1, while G1 and G2 had comparatively similar dissolution profiles (% dissolution (G1) 30 min = 100%; % dissolution (G1) 30 min = 110%; f1 (G1 versus G2) = 14) in M1. Conclusion This study highlighted the impact of rifaximin polymorphism on its physico-chemical properties (crystal structure, thermal behavior, solubility) and on its dissolution behavior which could affect the rifaximin bioavailability.
Collapse
Affiliation(s)
- Imen Toukabri
- Laboratory of Chemical, Galenic and Pharmacological Development of Medicines (LR12ES09), Faculty of Pharmacy of Monastir, University of Monastir, Monastir, Tunisia
| | - Senda Bahri
- Laboratory of Chemical, Galenic and Pharmacological Development of Medicines (LR12ES09), Faculty of Pharmacy of Monastir, University of Monastir, Monastir, Tunisia
| | - Souad Sfar
- Laboratory of Chemical, Galenic and Pharmacological Development of Medicines (LR12ES09), Faculty of Pharmacy of Monastir, University of Monastir, Monastir, Tunisia
| | - Mohamed Ali Lassoued
- Laboratory of Chemical, Galenic and Pharmacological Development of Medicines (LR12ES09), Faculty of Pharmacy of Monastir, University of Monastir, Monastir, Tunisia
| |
Collapse
|
8
|
Huang R, Zhu D, Wang J, Berko Y, Yu PA, Parker CM, Yu YC, Feng X, Xu X, Ashraf M. Food selection and effect of home preparation procedure for antibiotic food mixtures on homogeneity, stability, and dissolution. Int J Pharm 2024; 655:123993. [PMID: 38484862 DOI: 10.1016/j.ijpharm.2024.123993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Revised: 02/23/2024] [Accepted: 03/10/2024] [Indexed: 03/26/2024]
Abstract
Amoxicillin, doxycycline, and clindamycin are among the commonly used antibiotics to treat bacterial infections. However, dosage forms of antibiotics for pediatric patients may not be as readily available as the formulations for adult patients. As such, it is anticipated that during a public health emergency, special instruction may need to be provided on home preparation and administration procedures to dose pediatric patients using available stockpiles of oral tablet and capsule dosage forms. Mixing crushed tablets or capsule contents with soft- or liquid- foods is one of the most common home preparation procedures. To gain knowledge for safe and effective use of prepared drug product instead of the intended intact dosage form, the impact of manipulation of the dosage form was studied. Capsule opening, capsule content assay and uniformity, dissolution, homogeneity, and stability studies of drug mixed with various liquid and soft foods were carried out using intact capsules of amoxicillin, doxycycline, and clindamycin. Higher recovery of capsule contents was achieved when using hands or knives to open capsules compared to using scissors. The capsules of all three antibiotic products contained the labeled amount of active pharmaceutical ingredients (API). The peanut butter-drug mixtures failed both United States Pharmacopeia (USP) assay and dissolution criteria because the peanut butter significantly affected the solubility of the drugs, and hence it was omitted from further study. All drug-food mixtures of the three antibiotic products and 15 selected foods exhibited fast dissolution (e.g., >80 % in 60 min) in the tested medium, except for the amoxicillin-chocolate pudding mixture. Three household containers (cups, plates, and bowls) and four mixing times (0.5 min, 1 min, 2 min, and 5 min) were found to be suitable for preparation of homogeneous mixtures of the antibiotics and foods. For practical purposes, 1 to 2 min mixing time is sufficient to produce homogeneous mixtures. The results of this study provided product quality data on the interactions between the antibiotics and the foods and can potentially support future development of home preparation instructions of antibiotics for pediatric patients or patients with swallowing difficulties.
Collapse
Affiliation(s)
- Rong Huang
- FDA, Center for Drug Evaluation and Research, Office of Pharmaceutical Quality, Office of Testing and Research, USA
| | - Dongkai Zhu
- FDA, Center for Drug Evaluation and Research, Office of Pharmaceutical Quality, Office of Testing and Research, USA
| | - Jiang Wang
- FDA, Center for Drug Evaluation and Research, Office of Pharmaceutical Quality, Office of Testing and Research, USA
| | - Yvonne Berko
- FDA, Center for Drug Evaluation and Research, Office of Pharmaceutical Quality, Office of Testing and Research, USA
| | - Patricia A Yu
- CDC, National Center for Emerging and Zoonotic Infectious Diseases, Division of Preparedness and Emerging Infections, USA
| | - Corinne M Parker
- CDC, National Center for Emerging and Zoonotic Infectious Diseases, Division of Preparedness and Emerging Infections, USA
| | - Yon C Yu
- CDC, National Center for Emerging and Zoonotic Infectious Diseases, Division of Preparedness and Emerging Infections, USA
| | - Xin Feng
- FDA, Center for Drug Evaluation and Research, Office of Pharmaceutical Quality, Office of Testing and Research, USA
| | - Xiaoming Xu
- FDA, Center for Drug Evaluation and Research, Office of Pharmaceutical Quality, Office of Testing and Research, USA
| | - Muhammad Ashraf
- FDA, Center for Drug Evaluation and Research, Office of Pharmaceutical Quality, Office of Testing and Research, USA.
| |
Collapse
|
9
|
Jamil R, Polli JE. Application of bootstrap f 2 to dissolution data from biorelevant media and evidence of the conservative nature of bootstrap f 2. Eur J Pharm Sci 2024; 196:106745. [PMID: 38471596 DOI: 10.1016/j.ejps.2024.106745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Revised: 03/06/2024] [Accepted: 03/07/2024] [Indexed: 03/14/2024]
Abstract
f2 with or without bootstrapping is the most common method to compare in vitro dissolution profiles, but methods to compare dissolution profiles have become less harmonized. The objective was to compare outcomes from bootstrap f2 and f2 (i.e. not-bootstrapped f2) using a large set of in vitro dissolution data. Non-parametric bootstrapping was performed on the 104 profile comparisons that did not meet the percent coefficient of variation (CV%) criteria to use average dissolution data. Bootstrap f2 was taken as the lower 90 % confidence interval of bootstrapped samples. There was concordance between bootstrap f2 and f2 in 92 of the 104 comparisons (88 %). There were no false positives. However, 12 % were false negative. Inspection of these discordance pairs suggests that bootstrap f2 serves as a conservative approach to assess profile similarity, particularly when a value of 50 is being used as decision criteria.
Collapse
Affiliation(s)
- Raqeeb Jamil
- Department of Pharmaceutical Sciences, University of Maryland, 20 Penn Street, Baltimore, MD 21201, USA
| | - James E Polli
- Department of Pharmaceutical Sciences, University of Maryland, 20 Penn Street, Baltimore, MD 21201, USA.
| |
Collapse
|
10
|
Tan X, Huang Y, Muhammad U, Song C, Zhang S, Xia X, Feng Y, Guo L, Wang G, He Z, Xie F. Dissolution and regeneration of starch in hydroxyl-functionalized ionic liquid aqueous solution. Int J Biol Macromol 2024; 264:130775. [PMID: 38467210 DOI: 10.1016/j.ijbiomac.2024.130775] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 02/22/2024] [Accepted: 03/08/2024] [Indexed: 03/13/2024]
Abstract
There have been continuous quests for suitable solvents for starch, given the importance of effective starch dissolution in its modification and subsequent materials production. In light of this, the potential of hydroxyl-functionalized ionic liquid (IL) as a promising solvent for starch was investigated. Within this study, a hydroxyl-functionalized IL 1-(2,3-dihydroxypropyl)-3-methylimidazole chloride ([Dhpmim][Cl]) was synthesized, and the dissolution of starch in this IL and its aqueous solutions was examined. Starch (5.35 wt%) was completely dissolved in [Dhpmim][Cl] within 2 h at 100 °C. The solubility of starch in [Dhpmim][Cl]-water mixtures initially increased and then decreased with rising water content. The optimal ratio was found to be 1:9 (wt/wt) water:[Dhpmim][Cl], achieving the highest solubility at 9.28 wt%. Density functional theory (DFT) simulations elucidated the possible interactions between starch and solvents. After dissolution and regeneration in the 1:9 water:[Dhpmim][Cl] mixture, starch showed no discernible change in the molecular structure, with no derivatization reaction observed. Regenerated starch exhibited a transformation in crystalline structure from A-type to V-type, and its relative crystallinity (12.4 %) was lower than that of native starch (25.2 %), resulting in decreased thermal stability. This study suggests that the hydroxyl-functionalized IL, [Dhpmim][Cl], and its aqueous solutions serve as effective solvents for starch dissolution.
Collapse
Affiliation(s)
- Xiaoyan Tan
- College of Pharmacy, Shenzhen Technology University, Shenzhen 518118, China; College of Food Science and Light Industry, Nanjing Tech University, Nanjing 211816, China
| | - Yitao Huang
- College of Food Science and Light Industry, Nanjing Tech University, Nanjing 211816, China; State Key Laboratory of Fine Chemicals, Liaoning Key Laboratory for Catalytic Conversion of Carbon Resources, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Umair Muhammad
- College of Pharmacy, Shenzhen Technology University, Shenzhen 518118, China
| | - Chao Song
- Anning First People's Hospital Affiliated to Kunming University of Science and Technology, Kunming 650302, China
| | - Sai Zhang
- Shenzhen YHLO Biotech Co., Ltd., Shenzhen 518116, China
| | - Xueshan Xia
- Anning First People's Hospital Affiliated to Kunming University of Science and Technology, Kunming 650302, China
| | - Yue Feng
- Anning First People's Hospital Affiliated to Kunming University of Science and Technology, Kunming 650302, China
| | - Ling Guo
- Anning First People's Hospital Affiliated to Kunming University of Science and Technology, Kunming 650302, China
| | - Guowei Wang
- College of Food Science and Light Industry, Nanjing Tech University, Nanjing 211816, China.
| | - Zhendan He
- College of Pharmacy, Shenzhen Technology University, Shenzhen 518118, China.
| | - Fengwei Xie
- Department of Chemical Engineering, University of Bath, Bath BA2 7AY, United Kingdom
| |
Collapse
|
11
|
Parrotin F, Dazas B, Billon S, Chedozeau R, Savoye S, Descostes M, Tertre E. Role of zeolite content on the sorption properties of analcime-rich rocks from the Abinky Formation (Niger). Sci Total Environ 2024; 925:171615. [PMID: 38462009 DOI: 10.1016/j.scitotenv.2024.171615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Revised: 03/06/2024] [Accepted: 03/08/2024] [Indexed: 03/12/2024]
Abstract
The Abinky formation, composed of analcimolites (i.e., rocks with <70 wt% analcime), underlies Tchirezrine II, which hosts the Imouraren (Niger) uranium deposit. A potential mining project is under consideration to recover U by in situ acid leaching. Analcimolites are uncommon rocks, and assessing their ion-exchange properties is the first step to understand and predict the mobility of aqueous species in these formations. The objective of this study is then to understand the link between the Cation Exchange Capacities (CEC) of analcimolites as a function of their analcime content and associated crystal chemistry. Mineral quantification was performed by Rietveld refinement constrained by local chemical analysis with scanning electron microscopy coupled with Energy Dispersive Spectrometry. CEC were obtained at neutral pH by performing NH4+-for-Na+ exchange (CECNa/NH4), and Na+/H+ ion exchange experiments were performed with 4 analcimolites. Results showed that the analcime crystal chemistry deduced from Rietveld refinement was in good agreement with that obtained from SEM analysis (1.99 < Si/Al < 2.53). The results showed that all samples had a positive correlation between CECNa/NH4 and analcime content until ~30 meq/100 g for a sample containing ~85wt%Riet. of analcime, and that ~6 % of the total amounts of Na+ present in the analcime could be exchanged by NH4+ and H+. Based on Si and Al aqueous measurements, results showed that exchange with Na+ is the main process consuming H+ during Na+/H+ exchange when pH > 3.5. These experimental data were then interpreted by considering a single site equal to the CECNa/NH4 value, specific for each analcimolite, and a selectivity coefficient equal to log KNa/H = 1.3 (Gaines Thomas convention) being equal for all samples investigated. Finally, these data were used to assess the role played by Na+/H+ exchange in the pH evolution of the pore water of an analcime-rich rock subjected to dynamic acidification.
Collapse
Affiliation(s)
- Flora Parrotin
- IC2MP, Equipe HydrASA, UMR 7285/Université de Poitiers, 86073 Poitiers, France; ORANO Mining, Environmental R&D Dpt., 92320 Chatillon, France.
| | - Baptiste Dazas
- IC2MP, Equipe HydrASA, UMR 7285/Université de Poitiers, 86073 Poitiers, France
| | - Sophie Billon
- IC2MP, Equipe HydrASA, UMR 7285/Université de Poitiers, 86073 Poitiers, France
| | - Raphaël Chedozeau
- IC2MP, Equipe HydrASA, UMR 7285/Université de Poitiers, 86073 Poitiers, France
| | - Sébastien Savoye
- Université Paris-Saclay, CEA, Service de Physico-Chimie, 91191 Gif-sur-Yvette, France
| | - Michaël Descostes
- ORANO Mining, Environmental R&D Dpt., 92320 Chatillon, France; Centre de Géosciences, MINES Paris, PSL University, 35 rue St Honoré, 77300 Fontainebleau, France
| | - Emmanuel Tertre
- IC2MP, Equipe HydrASA, UMR 7285/Université de Poitiers, 86073 Poitiers, France
| |
Collapse
|
12
|
Henry S, Carroll M, Murphy KN, Leys L, Markl D, Vanhoorne V, Vervaet C. Semi-crystalline materials for pharmaceutical fused filament fabrication: Dissolution and porosity. Int J Pharm 2024; 652:123816. [PMID: 38246479 DOI: 10.1016/j.ijpharm.2024.123816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2023] [Revised: 01/14/2024] [Accepted: 01/15/2024] [Indexed: 01/23/2024]
Abstract
A better understanding of crystallization kinetics and the effect on drug product quality characteristics is needed to exploit the use of semi-crystalline polymers in pharmaceutical fused filament fabrication. Filaments were prepared from polycaprolactone or polyethylene oxide loaded with a crystallization inhibitor or inducer, which was either 10% (w/w) ibuprofen or theophylline. A design-of-experiments approach was conducted to investigate the effect of nozzle temperature, bed temperature and print speed on the printed tablets' microstructure and dissolution kinetics. Helium pycnometry derived porosity proved an ideal technique to capture significant distortions in the tablets' microstructure. On the other hand, terahertz time domain spectroscopy (THz-TDS) analysis proved valuable to investigate additional enclosed pores of the tablets' microstructure. The surface roughness was analyzed using optical coherence tomography, showing the importance of extensional viscosity for printed drug products. Drug release occurred via erosion for tablets consisting of polyethylene oxide, which partly reduced the effect of the inner microstructure on the drug release kinetics. An initial burst release effect was noted for polycaprolactone tablets, after which drug release continued via diffusion. Both the pore and crystalline microstructure were deemed essential to steer drug release. In conclusion, this research provided guidelines for material and process choice when a specific microstructure has to be constructed from semi-crystalline materials. In addition, non-destructive tests for the characterization of printed products were evaluated.
Collapse
Affiliation(s)
- S Henry
- Laboratory of Pharmaceutical Technology, Ghent University, Ghent, Belgium
| | - M Carroll
- Centre for Continuous Manufacturing and Advanced Crystallisation (CMAC), University of Strathclyde, Technology and Innovation Centre, Glasgow, UK; Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow, UK
| | - K N Murphy
- Centre for Continuous Manufacturing and Advanced Crystallisation (CMAC), University of Strathclyde, Technology and Innovation Centre, Glasgow, UK; Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow, UK
| | - L Leys
- Laboratory of Pharmaceutical Process Analytical Technology, Ghent University, 9000 Ghent, Belgium
| | - D Markl
- Centre for Continuous Manufacturing and Advanced Crystallisation (CMAC), University of Strathclyde, Technology and Innovation Centre, Glasgow, UK; Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow, UK
| | - V Vanhoorne
- Laboratory of Pharmaceutical Technology, Ghent University, Ghent, Belgium
| | - C Vervaet
- Laboratory of Pharmaceutical Technology, Ghent University, Ghent, Belgium.
| |
Collapse
|
13
|
Khepar V, Sidhu A, Chandel S. Sustained release of Zn from zinc sulfide nanoparticles (ZnS NPs) amplified the bioaccessibility of Zn in soil: Adsorption dynamics and dissolution kinetics. Environ Res 2024; 251:118624. [PMID: 38447602 DOI: 10.1016/j.envres.2024.118624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 02/26/2024] [Accepted: 03/03/2024] [Indexed: 03/08/2024]
Abstract
Controlled-release micronutrient supplementation to provide better bioavailable zinc (Zn) under alkaline soil conditions is a concept of commercial pertinence for sustainable agriculture. High pH stable nano-scaled ZnS is the material under study in the present investigation where the adsorption dynamics and dissolution kinetics of sono-chemically synthesized zinc sulfide nanoparticles (ZnS NPs) were evaluated in comparison to ZnSO4 in Lufa 2.2 soil for supplementation of Zn. The mechanism of adsorption of ZnS NPs and ZnSO4 onto Lufa 2.2 soil was well explained by fitting into the Freundlich adsorption model and pseudo-second order equation. ZnS NPs reflected the stronger ability to get adsorbed on the Lufa 2.2 soil as compared to metal ions, due to higher surface reactivity of NPs and higher Kf value (0.557) than ZnSO4 (0.463). Time relevant enhancement in extractability of Zn from ZnS NPs amended soil and diminution in extractability of Zn from ZnSO4 spiked soil was observed in bioavailability studies. The increased labile pool of Zn from ZnS NPs amended soil over time was due to their slow dissolution in soil and could be adjusted to consider as "sustained released ZnS NPs". Dissolution of ZnS nanoparticles (NPs) in Lufa 2.2 soil adhered to the first-order extraction model, exhibiting extended half-lives of 27.72 days (low dose) and 28.87 days (high dose). This supported prolonged stability, increased reactivity, and reduced ecological risk compared to conventional Zn salt fertilizers, promoting enhanced crop productivity.
Collapse
Affiliation(s)
- Varinder Khepar
- Department of Chemistry, Punjab Agricultural University, Ludhiana, Punjab, 141004, India.
| | - Anjali Sidhu
- Department of Soil Science, Punjab Agricultural University, Ludhiana, Punjab, 141004, India.
| | - Sumita Chandel
- Department of Soil Science, Punjab Agricultural University, Ludhiana, Punjab, 141004, India
| |
Collapse
|
14
|
Peng L, Li D, Song H, Kuang X, Zeng Q, Ao H. The dissolution characteristics of cadmium containing birnessite produced from paddy crusts. Sci Total Environ 2024; 914:169811. [PMID: 38211864 DOI: 10.1016/j.scitotenv.2023.169811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Revised: 12/27/2023] [Accepted: 12/29/2023] [Indexed: 01/13/2024]
Abstract
The cadmium (Cd) accumulates in birnessite as it forms on the surface of paddy crusts (PC). The stability of Cd-containing birnessite is influenced by environmental factors, and destabilized birnessite releases dissolved Cd. We report the effects of pH, oxalic acid, and light on the dissolution of Cd-containing birnessite. We found that at pH 4.0, with light and 0.20 mol/L oxalic acid, the ratio of dissolved Cd and manganese (Mn) peaked after 24 h at 2978.0 μg/g and 326.8 mg/g, respectively. The three environmental factors affected the dissolution of Cd-containing birnessite in the following order: pH > oxalic acid > light. During dissolution process, Cd and Mn did not dissolve simultaneously, and the dissolved Cd/Mn ratio in the solution was significantly lower than that of the pristine mineral (33.5 × 10-3). Compared with Mn, Cd dissolution was inhibited by strong acidity (pH 4.0-5.0), and the dissolved Cd/Mn ratio was 5-10 × 10-3. Mild acidity (pH 6.0) was weakly inhibitory, with a Cd/Mn ratio of 6-15 × 10-3. In an alkaline (pH 8.0) oxalate environment, light illumination inhibited Cd dissolution, and the Cd/Mn ratio decreased over time due to the stability of the products formed by oxalate and carbonate, with Cd being more stable than those formed by Mn. Our findings would provide insights into the migration and transformation of PC-associated Cd in paddy fields.
Collapse
Affiliation(s)
- Liang Peng
- College of Environmental & Ecology, Hunan Agricultural University, Changsha 410128, PR China.
| | - Dan Li
- College of Environmental & Ecology, Hunan Agricultural University, Changsha 410128, PR China
| | - Huijuan Song
- College of Environmental & Ecology, Hunan Agricultural University, Changsha 410128, PR China
| | - Xiaolin Kuang
- College of Environmental & Ecology, Hunan Agricultural University, Changsha 410128, PR China
| | - Qingru Zeng
- College of Environmental & Ecology, Hunan Agricultural University, Changsha 410128, PR China
| | - Hejun Ao
- College of Agronomy, Hunan Agricultural University, Changsha 410128, PR China.
| |
Collapse
|
15
|
Kir F, Al-Sulaiti FK, Sahin S. Evaluation of in vitro dissolution profiles of modified-release metoprolol succinate tablets crushed using mortar and pestle technique. Eur J Pharm Sci 2024; 194:106694. [PMID: 38191064 DOI: 10.1016/j.ejps.2024.106694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Revised: 12/24/2023] [Accepted: 01/04/2024] [Indexed: 01/10/2024]
Abstract
PURPOSE Clinical practice guidelines advise against crushing modified-release dosage forms. Metoprolol succinate modified-release (MS-MR) tablets are commonly crushed in clinical practice to facilitate administration to patients with swallowing difficulties or using feeding tubes. To date, the effect of this practice remains unexplored. The in vitro effects of crushing commercially available MS-MR tablets were explored using a holistic approach. METHODS Dissolution profiles of crushed versus whole MS-MR tablets were compared. Tablets were crushed to powder state using pragmatic method mimicking hospital practices. For standardization purposes, the same operator, duration (60 seconds), hand, and mortar-pestle apparatus were used. Dissolution studies were conducted per U.S. Pharmacopeia at pH 1.2, pH 4.5, and pH 6.8 with USP apparatus 2 (paddle) at rotation speed of 50 rpm at 37±0.5 °C in 500 mL dissolution media. Samples were withdrawn at predetermined time points. Percent drug dissolved was measured by validated UV-vis Spectrophotometry. Comprehensive analysis of the dissolution data was conducted using model-independent, model-dependent, and ANOVA-based approaches (SPSS v.23 at α=0.05). Similarity (f2) and difference (f1) factors were calculated to compare the dissolution profiles between crushed (CT) and whole tablets (WT). Goodness of fit (GOF) analysis examined the compliance between in vitro dissolution behaviors and several drug release models. Model selection was based on GOF plots, Akaike criteria and adjusted coefficient of determination (R2adj). Imaging and particle size distribution analysis were conducted to examine associated surface and morphologic changes. RESULTS The dissolution profiles were not similar at pH 4.5 (f2=45.43, f1=18.97) and pH 6.8 (f2=31.47, f1=32.94). CT best fitted with Higuchi (pH 1.2: R2adj=0.9990), Weibull (pH 4.5: R2adj=0.9884), and Korsmeyer-Peppas (pH 6.8: R2adj=0.9719). Contrastingly, WT best fitted with Hopfenberg (pH 1.2: R2adj=0.9986), logistic (pH 4.5: R2adj=0.9839) and first-order (pH 6.8: R2adj=0.9979) models. A significant difference in the dissolution profiles was found between CT and WT using multivariate analysis of variance per time points and between the tablet forms (p=0.004). This was confirmed by unparalleled dissolution profiles. Crushing resulted in variations in particle size and surface morphological changes to the micropellets. CONCLUSION Crushing practices change the dissolution profile of MS-MR tablets by deforming the surface morphology of embedded micropellets. Amounts of drug dissolved between CT and WT were not the same at the compared time points across gastrointestinal pH ranges. This suggests potential clinical impact on plasma-concentration profiles of critically ill patients using feeding tube.
Collapse
Affiliation(s)
- Fatma Kir
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Hacettepe University, Ankara, Turkey
| | - Fatima K Al-Sulaiti
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Hacettepe University, Ankara, Turkey
| | - Selma Sahin
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Hacettepe University, Ankara, Turkey.
| |
Collapse
|
16
|
Sleiman N, Pflieger R, Hallez L, Nikitenko SI, Hihn JY. Magnesium and magnesium alloy dissolution by high intensity focused ultrasound: erosion/cavitation vs. Wave propagation. Ultrason Sonochem 2024; 104:106836. [PMID: 38430906 PMCID: PMC10912864 DOI: 10.1016/j.ultsonch.2024.106836] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 02/07/2024] [Accepted: 02/27/2024] [Indexed: 03/05/2024]
Abstract
The dissolution of metals, influenced by mechanical and chemical factors, plays a crucial role in various applications. Ultrasonic irradiation has been explored for its ability to enhance dissolution rates and modify surface characteristics. In this study, we investigate the dissolution of magnesium (Mg) and magnesium alloys under high-intensity focused ultrasound (HIFU) conditions with frequency sweeping (wobbling). Our findings reveal distinct effects of cavitation and acoustic streaming on the dissolution process. For pure magnesium, ultrasonic treatment significantly increases dissolution rates compared to silent conditions. Negative frequency sweeps result in the highest dissolution rates, linked to increased cavitation activity, while positive sweeps reduce dissolution rates but maintain acoustic streaming effects. The removal of surface oxides is accelerated in all sonication conditions. Macro- and micro-roughness patterns on the surface correspond to the wobbling frequency range, with wavelengths matching the average ultrasonic frequency. However, dissolution is not uniform across the sample, and preferential attack occurs at the focal point during negative frequency sweeps. In contrast, magnesium alloys exhibit lower dissolution rates than pure Mg. The alloy's mechanical properties make it less susceptible to cavitation erosion but more sensitive to acoustic streaming-induced dissolution. Grain boundaries are preferentially attacked, revealing differences between ductile pure Mg and the harder, more cavitation-resistant, alloy. This study highlights the complex interplay between cavitation and acoustic streaming in the dissolution of magnesium and its alloys under HIFU conditions, shedding light on the limits and potential applications of this technique, particularly in microstructure analysis.
Collapse
Affiliation(s)
- Noura Sleiman
- Université de Franche-Comté, CNRS, Institut UTINAM UMR 6213, F-25000 Besançon, France; ICSM UMR 5257 - CEA, Univ Montpellier, CNRS, ENSCM, Bagnols-sur-Cèze, France; IRT M2P, Metz, France
| | - Rachel Pflieger
- ICSM UMR 5257 - CEA, Univ Montpellier, CNRS, ENSCM, Bagnols-sur-Cèze, France
| | - Loïc Hallez
- Université de Franche-Comté, CNRS, Institut UTINAM UMR 6213, F-25000 Besançon, France
| | - Sergey I Nikitenko
- ICSM UMR 5257 - CEA, Univ Montpellier, CNRS, ENSCM, Bagnols-sur-Cèze, France
| | - Jean-Yves Hihn
- Université de Franche-Comté, CNRS, Institut UTINAM UMR 6213, F-25000 Besançon, France; IRT M2P, Metz, France.
| |
Collapse
|
17
|
Benedikt Brenner M, Wüst M, Kuentz M, Wagner KG. High loading of lipophilic compounds in mesoporous silica for improved solubility and dissolution performance. Int J Pharm 2024; 654:123946. [PMID: 38417728 DOI: 10.1016/j.ijpharm.2024.123946] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2024] [Revised: 02/22/2024] [Accepted: 02/22/2024] [Indexed: 03/01/2024]
Abstract
Loading poorly soluble active pharmaceutical ingredients (API) into mesoporous silica can enable API stabilization in non-crystalline form, which leads to improved dissolution. This is particularly beneficial for highly lipophilic APIs (log D7.4 > 8) as these drugs often exhibit limited solubility in dispersion forming carrier polymers, resulting in low drug load and reduced solid state stability. To overcome this challenge, we loaded the highly lipophilic natural products coenzyme Q10 (CoQ10) and astaxanthin (ASX), as well as the synthetic APIs probucol (PB) and lumefantrine (LU) into the mesoporous silica carriers Syloid® XDP 3050 and Silsol® 6035. All formulations were physically stable in their non-crystalline form and drug loads of up to 50 % were achieved. At increasing drug loads, a marked increase in equilibrium solubility of the active ingredients in biorelevant medium was detected, leading to improved performance during biorelevant biphasic dissolution studies (BiPHa + ). Particularly the natural products CoQ10 and ASX showed substantial benefits from being loaded into mesoporous carrier particles and clearly outperformed currently available commercial formulations. Performance differences between the model compounds could be explained by in silico calculations of the mixing enthalpy for drug and silica in combination with an experimental chromatographic method to estimate molecular interactions.
Collapse
Affiliation(s)
- Marvin Benedikt Brenner
- University of Bonn, Pharmaceutical Institute, Department of Pharmaceutics, Gerhard-Domagk-Str. 3, 53121 Bonn, Germany
| | - Matthias Wüst
- University of Bonn, Institute of Nutritional and Food Sciences, Food Chemistry, Friedrich-Hirzebruch-Allee 7, 53115 Bonn, Germany
| | - Martin Kuentz
- University of Applied Sciences and Arts Northwestern Switzerland, Institute of Pharma Technology, Hofackerstr. 30, 4132 Muttenz, Switzerland
| | - Karl G Wagner
- University of Bonn, Pharmaceutical Institute, Department of Pharmaceutics, Gerhard-Domagk-Str. 3, 53121 Bonn, Germany.
| |
Collapse
|
18
|
Pokrovsky OS, Akerman A, Fraysse F, Olonova MV, Kuznetzov AA, Loiko SV, Meunier JD. Elemental composition of grass phytoliths: Environmental control and effect on dissolution. Sci Total Environ 2024; 913:169764. [PMID: 38176565 DOI: 10.1016/j.scitotenv.2023.169764] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Revised: 12/27/2023] [Accepted: 12/28/2023] [Indexed: 01/06/2024]
Abstract
Plant phytoliths, which represent the main pool of silica (Si) in the form of hydrous Si oxide, are capable of providing valuable information on different aspect of environmental issues including paleo-environmental reconstruction and agricultural sustainability. Phytoliths may have different chemical composition, which, in turn, affects their preservation in soils ad impacts terrestrial cycle of the occluded elements including micro-nutrients and environmental toxicants. Yet, in contrast to sizable work devoted to phytoliths formation, dissolution and physico-chemical properties, the mechanisms that control total (major and trace) elemental composition and the impact that various elements exert on phytolith reactivity and preservation in soils remains poorly known. In order to fil this gap in knowledge, here we combined two different approaches - analytical trace element geochemistry and experimental physical chemistry. First, we assessed full elemental composition of phytoliths from different plants via measuring major and trace elements in 9 samples of grasses collected in northern Eurasia during different seasons, 18 grasses from Siberian regions, and 4 typical Si-concentrating plants (horsetail, larch, elm and tree fern). We further assessed the dissolution rates of phytoliths exhibiting drastically different concentrations of trace metals. In the European grasses, the variations of phytolith chemical composition among species were highly superior to the variations across vegetative season. Compared to European samples, Siberian grass phytoliths were impoverished in Ca and Sr, exhibited similar concentrations of Li, B, Na, Mg, K, V, Zn, Ni, Mo, As, Ba, and U, and were strongly enriched (x 100-1000) in lithogenic elements (trivalent and tetravalent hydrolysates), P, Mn, Fe and divalent metals. Overall, the variations in elemental composition between different species of the same region were lower compared to variations of the same species from distant regions. The main factors controlling phytoliths elemental composition are the far-range atmospheric (dust) transfer, climatic conditions (humidity), and, in a lesser degree, local lithology and anthropogenic pollution. Despite significant, up to 3 orders of magnitude, difference in TE composition of grass and other plant phytoliths, the dissolution rates of grass phytoliths measured in this study were similar, within the experimental uncertainty, to those of other plants studied in former works. Therefore, elemental composition of phytoliths has relatively minor impact on their preservation in soils.
Collapse
Affiliation(s)
- Oleg S Pokrovsky
- Geoscience and Environment Toulouse, UMR 5563 CNRS, University of Toulouse, 14 Avenue Edouard Belin, 31400 Toulouse, France; BIO-GEO-CLIM Laboratory, Tomsk State University, Lenin Ave, 36, Tomsk 634050, Russia.
| | - Alisson Akerman
- Geoscience and Environment Toulouse, UMR 5563 CNRS, University of Toulouse, 14 Avenue Edouard Belin, 31400 Toulouse, France
| | - Fabrice Fraysse
- Université de Lorraine, LIEC-Ecole Nationale Supérieure de Géologie, 15 Avenue du Charmois, 54500 Vandœuvre-lès-Nancy, France
| | - Marina V Olonova
- BIO-GEO-CLIM Laboratory, Tomsk State University, Lenin Ave, 36, Tomsk 634050, Russia
| | - Alexander A Kuznetzov
- BIO-GEO-CLIM Laboratory, Tomsk State University, Lenin Ave, 36, Tomsk 634050, Russia
| | - Sergey V Loiko
- BIO-GEO-CLIM Laboratory, Tomsk State University, Lenin Ave, 36, Tomsk 634050, Russia
| | | |
Collapse
|
19
|
Sinko PD, Parker L, Prahl Wittberg L, Bergström CAS. Estimation of the concentration boundary layer adjacent to a flat surface using computational fluid dynamics. Int J Pharm 2024; 653:123870. [PMID: 38401511 DOI: 10.1016/j.ijpharm.2024.123870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Revised: 01/28/2024] [Accepted: 01/29/2024] [Indexed: 02/26/2024]
Abstract
Dissolution-permeation (D/P) experiments are widely used during preclinical development due to producing results with better predictability than traditional monophasic experiments. However, it is difficult to compare absorption across in vitro setups given the propensity to only report apparent permeability. We therefore developed an approach to predict the concentration boundary layer for any D/P device by using computational fluid dynamics (CFD). The Navier-Stokes and continuity equation in 2D were solved numerically in MATLAB and by finite element methods in COMSOL v6.1 to predict the momentum [Formula: see text] and concentration ηg boundary layer for a flow over a flat plate, i.e. the classical Blasius boundary layer flow. A MATLAB algorithm was developed to calculate the edge of either boundary layer. The methodology to determine the concentration boundary layer based on Blasius's analysis provided an accurate estimate for both [Formula: see text] and ηg, resulting in, [Formula: see text] , at high Schmidt numbers (Sc ∼ 1000) within 14 % of the Blasius solution and 6.6 % of the accepted Schmidt number correlation ( [Formula: see text] ). The methodology based on the Blasius analysis of the concentration boundary layer using velocity and concentration profiles computed using CFD presented herein will enable characterization/analysis of complex D/P apparatuses used in preclinical development, where an analytical solution may not be available.
Collapse
Affiliation(s)
- Patrick D Sinko
- Department of Pharmacy, Uppsala Biomedical Center, Uppsala University, 751 23 Uppsala, Sweden
| | - Louis Parker
- FLOW, Department of Engineering Mechanics, Royal Institute of Technology, KTH, Osquars Backe 18, SE-100 44 Stockholm, Sweden
| | - Lisa Prahl Wittberg
- FLOW, Department of Engineering Mechanics, Royal Institute of Technology, KTH, Osquars Backe 18, SE-100 44 Stockholm, Sweden
| | - Christel A S Bergström
- Department of Pharmacy, Uppsala Biomedical Center, Uppsala University, 751 23 Uppsala, Sweden.
| |
Collapse
|
20
|
Yu D, Hoag SW. The impact of diluents on the compaction, dissolution, and physical stability of amorphous solid dispersion tablets. Int J Pharm 2024; 654:123924. [PMID: 38395318 DOI: 10.1016/j.ijpharm.2024.123924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Revised: 02/09/2024] [Accepted: 02/18/2024] [Indexed: 02/25/2024]
Abstract
Amorphous solid dispersion (ASD) is an effective approach for enhancing the solubility, dissolution, and bioavailability of poorly water-soluble drugs. However, these metastable forms can transform into more thermodynamically stable but less soluble crystalline forms. Despite this challenge, research on processing ASDs into solid dosage forms, such as tablets, is lacking. This work aims to fill this gap by investigating the impact of common diluents on the tableting behavior, dissolution, and physical stability of ASDs composed of itraconazole and hypromellose acetate succinate. Four widely used diluents found in commercially available ASD tablets were selected for the study: microcrystalline cellulose (MCC), anhydrous lactose, starch, and mannitol. The performance of ASD tablets varied significantly depending on the diluent used. Tablets prepared with MCC exhibited higher mechanical strength than those formulated using other diluents. ASD tablets containing mannitol and lactose revealed a faster release rate than those composed of MCC or starch. Notably, the study highlighted that the physical stability of ASDs within a tablet is not solely dependent on the amount of sorbed water; crystalline diluents like lactose and mannitol were found to facilitate ASD recrystallization within a tablet. In summary, the study underscores the importance of excipient selection, considering factors such as mechanical strength, dissolution rate, and physical stability of ASD tablets. These findings offer valuable insights into the selection of excipients for downstream ASD tablet development, leading to improved manufacturability, physical stability, and the overall quality of ASD drug products.
Collapse
Affiliation(s)
- Dongyue Yu
- University of Maryland, Baltimore, School of Pharmacy, Baltimore, MD 21201, United States
| | - Stephen W Hoag
- University of Maryland, Baltimore, School of Pharmacy, Baltimore, MD 21201, United States.
| |
Collapse
|
21
|
Li J, Kang Z, Kang Z, Liu X, Zhang X. Hydrothermal fluid alteration of the Ordovician epigenetic karstification reservoir in the Tahe Oilfield, Tarim Basin, NW China. Sci Total Environ 2024; 912:169363. [PMID: 38123095 DOI: 10.1016/j.scitotenv.2023.169363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 11/28/2023] [Accepted: 12/11/2023] [Indexed: 12/23/2023]
Abstract
In recent years, the Ordovician carbonate reservoirs in the Tarim Basin have received attention due to continuous advancements in of deep strata exploration for oil and gas. The Ordovician carbonates in the Tahe Oilfield have experienced multiple phases of tectonic movement and ancient karst action to form reservoirs consisting of multi-scale spaces such as large caves, fractures, and dissolution pores. This study identifies indicators of atmospheric freshwater karst and hydrothermal karst in the Ordovician carbonate rocks of the Tahe Oilfield by comparing and analyzing lithological observation, geochemical data, fluid inclusions, logging interpretation, and seismic data. The spatial and temporal distribution of karst reservoirs are summarized, and the results show that the stage of tectonic movement and pulsating uplift of strata occurred in the early Caledonian and Hercynian orogenies, and the carbonate rocks were uplifted to the surface and large-scale atmospheric freshwater karstification. In the deeper strata, the thermal convection of fluids caused by volcanic activity accelerated the thermochemical sulfate reduction (TSR), and the generated H2S gas accompanied the upward transport of hydrothermal fluids, which further dissolved and modified the original karst system, increasing the storage space. However, away from the heat source, calcite (positive Eu anomaly, higher 87Sr/86Sr ratio, lower δ18O value,) reprecipitated due to the temperature reduction, so the role of hydrothermal activity in reservoir reconstruction is limited. The two karst action patterns indicated that epigenetic karstification is an important process for forming carbonate reservoirs in the Tahe Oilfield and the basis of hydrothermal karst reservoir formation. This study demonstrates the research and exploration value of karstification for the geo-energy field, which could benefit sustainable development in the Tarim Basin.
Collapse
Affiliation(s)
- Jiaqi Li
- School of Energy Resources, China University of Geosciences, Beijing 100083, China
| | - Zhihong Kang
- School of Energy Resources, China University of Geosciences, Beijing 100083, China.
| | - Zhijiang Kang
- Sinopec petroleum exploration and Development Research Institute, Beijing 100083, China
| | - Xing Liu
- School of Energy Resources, China University of Geosciences, Beijing 100083, China
| | - Xuemei Zhang
- School of Geosciences, China University of Petroleum, Qingdao, Shandong 266580, China
| |
Collapse
|
22
|
Zhuo X, Tozzetti M, Arnous A, Leng D, Foderà V, Löbmann K. Investigating the influence of protein secondary structure on the dissolution behavior of β-lactoglobulin-based amorphous solid dispersions. Int J Pharm 2024; 653:123887. [PMID: 38346599 DOI: 10.1016/j.ijpharm.2024.123887] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Revised: 02/06/2024] [Accepted: 02/06/2024] [Indexed: 02/22/2024]
Abstract
Proteins acting as carriers in amorphous solid dispersions (ASDs) demonstrate a notable sensitivity to the spray drying process, potentially leading to changes in their conformation. The main aim of this study was to investigate the dissolution performance of ASDs based on proteins with different content of secondary structures, specifically β-sheet and α-helix structures. We prepared β-sheet-rich and α-helix-rich β-lactoglobulin (BLG), along with corresponding ASDs containing 10 wt% and 30 wt% drug loadings, through spray drying using celecoxib as the model drug. Circular dichroism and Fourier Transform Infrared Spectroscopy results revealed that even though changes in secondary structure were obtained in the spray-dried powders, the BLGs exhibited reversibility upon re-dissolving in phosphate buffer with varying pH levels. Both β-sheet-rich BLG and α-helix-rich BLG exhibited enhanced dissolution rates and higher solubility in the media with pH values far from the isoelectric point (pI) of BLG (pH 2, 7, 8, and 9) compared to the pH closer to the pI (pH 3, 4, 5, and 6). Notably, the release rate and solubility of the drug and BLG from both types of BLG-based ASDs at 10 wt% drug loading were largely dependent on the solubility of pure SD-BLGs. α-helix-rich BLG-ASDs consistently exhibited equivalent or superior performance to β-sheet-rich BLG-ASDs in terms of drug release rate and solubility, regardless of drug loading. Moreover, both types of BLG-based ASDs at 10 wt% drug loading exhibited faster release rates and higher solubility, for both the drug and BLG, compared to the ASDs at 30 wt% drug loading in pHs 2, 7, and 9 media.
Collapse
Affiliation(s)
- Xuezhi Zhuo
- Department of Pharmacy, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark
| | - Martina Tozzetti
- Department of Pharmacy, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark
| | - Anis Arnous
- Zerion Pharma A/S, Blokken 11, DK-3460 Birkerød, Denmark
| | - Donglei Leng
- Zerion Pharma A/S, Blokken 11, DK-3460 Birkerød, Denmark
| | - Vito Foderà
- Department of Pharmacy, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark
| | - Korbinian Löbmann
- Department of Pharmacy, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark; Zerion Pharma A/S, Blokken 11, DK-3460 Birkerød, Denmark
| |
Collapse
|
23
|
Hokkala E, Strachan CJ, Agopov M, Järvinen E, Semjonov K, Heinämäki J, Yliruusi J, Svanbäck S. Thermodynamic solubility measurement without chemical analysis. Int J Pharm 2024; 653:123890. [PMID: 38346601 DOI: 10.1016/j.ijpharm.2024.123890] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2023] [Revised: 02/06/2024] [Accepted: 02/07/2024] [Indexed: 02/17/2024]
Abstract
In this work, the optical imaging based single particle analysis (SPA) and the gold standard shake-flask (SF) solubility methods are compared. We show that to analyze pharmaceutical compounds spanning 7 log units in solubility and a diverse chemical space with limited resources, several analytical techniques are required (HPLC-UV, LC-MS, refractometry and UV-Vis spectrometry), whereas solely the SPA method is able to analyze all the same compounds. SPA experiments take only minutes, while for SF, it may take days to reach thermodynamic equilibration. This decreases the time span needed for the solubility experiment from initial preparations to obtaining the result from roughly three days to less than three hours. The optimal particle size for SPA ranges from approximately one to hundreds of microns. Challenges include measuring large particles, very fast dissolving compounds and handling small sample sizes. Inherent exclusion of density from the SPA measurement is a potential source of error for compounds with very low or high density values. The average relative difference of 37 % between the two methods is very good in the realm of solubility, where 400 % interlaboratory reproducibility can be expected.
Collapse
Affiliation(s)
- Emma Hokkala
- Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, Viikinkaari 5 E 00790, Helsinki, Finland.
| | - Clare J Strachan
- Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, Viikinkaari 5 E 00790, Helsinki, Finland
| | - Mikael Agopov
- The Solubility Company, Viikinkaari 4 00790, Helsinki, Finland
| | - Erkka Järvinen
- Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, Viikinkaari 5 E 00790, Helsinki, Finland
| | - Kristian Semjonov
- Institute of Pharmacy, Faculty of Medicine, University of Tartu, Nooruse 1 50411, Tartu, Estonia
| | - Jyrki Heinämäki
- Institute of Pharmacy, Faculty of Medicine, University of Tartu, Nooruse 1 50411, Tartu, Estonia
| | - Jouko Yliruusi
- The Solubility Company, Viikinkaari 4 00790, Helsinki, Finland
| | - Sami Svanbäck
- The Solubility Company, Viikinkaari 4 00790, Helsinki, Finland
| |
Collapse
|
24
|
Plano D, Rudolph N, Saal C, Abrahamsson B, Cristofoletti R, Kambayashi A, Langguth P, Mehta M, Parr A, Polli JE, Shah VP, Charoo N, Dressman J. Biowaiver Monograph for Immediate-Release Solid Oral Dosage Forms: Isavuconazonium Sulfate. J Pharm Sci 2024; 113:386-395. [PMID: 37951471 DOI: 10.1016/j.xphs.2023.11.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 11/07/2023] [Accepted: 11/07/2023] [Indexed: 11/14/2023]
Abstract
A Biopharmaceutics Classification System (BCS)-based biowaiver monograph is presented for isavuconazonium sulfate. A BCS-based biowaiver is a regulatory option to substitute appropriate in vitro data for in vivo bioequivalence studies. Isavuconazonium sulfate is the prodrug of isavuconazole, a broad-spectrum azole antifungal indicated for invasive fungal infections. While the prodrug can be classified as a BCS Class III drug with high solubility but low permeability, the parent drug can be classified as a BCS Class II drug with low solubility but high permeability. Interestingly, the in vivo behavior of both is additive and leads isavuconazonium sulfate to act like a BCS class I drug substance after oral administration. In this work, experimental solubility and dissolution data were evaluated and compared with available literature data to investigate whether it is feasible to approve immediate release solid oral dosage forms containing isavuconazonium sulfate according to official guidance from the FDA, EMA and/or ICH. The risks associated with waiving a prodrug according to the BCS-based biowaiver guidelines are reviewed and discussed, noting that current regulations are quite restrictive on this point. Further, results show high solubility but instability of isavuconazonium sulfate in aqueous media. Although experiments on the dissolution of the capsule contents confirmed 'very rapid' dissolution of the active pharmaceutical ingredient (API) isavuconazonium sulfate, its release from the commercial marketed capsule formulation Cresemba is limited by the choice of capsule shell material, providing an additional impediment to approval of generic versions via the BCS-Biowaiver approach.
Collapse
Affiliation(s)
- David Plano
- Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, 60596 Frankfurt am Main, Germany
| | - Niklas Rudolph
- Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, 60596 Frankfurt am Main, Germany
| | - Christoph Saal
- Boehringer Ingelheim Pharma GmbH & Co. KG, 88400 Biberach an der Riß, Germany
| | - Bertil Abrahamsson
- Oral Product Development, Pharmaceutical Technology & Development, Operations, AstraZeneca Gothenburg, Sweden
| | - Rodrigo Cristofoletti
- Center for Pharmacometrics and Systems Pharmacology, Department of Pharmaceutics, College of Pharmacy, University of Florida, Orlando, Florida 32827, USA
| | - Atsushi Kambayashi
- Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda, Japan
| | - Peter Langguth
- Institute of Pharmacy, Johannes Gutenberg University, Mainz, Germany
| | - Mehul Mehta
- United States Food and Drug Administration, Centre for Drug Evaluation and Research, Silver Spring, Maryland 20993, USA
| | - Alan Parr
- BioCeutics LLC, Cary , North Carolina 27511, USA
| | - James E Polli
- Department of Pharmaceutical Sciences, School of Pharmacy, University of Maryland, Baltimore, Maryland 20742, USA
| | - Vinod P Shah
- The International Pharmaceutical Federation (FIP), The Hague, the Netherlands
| | - Naseem Charoo
- Adcan Pharma LLC, ICAD III, Mussafah, Abu Dhabi, United Arab Emirates
| | - Jennifer Dressman
- Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, 60596 Frankfurt am Main, Germany.
| |
Collapse
|
25
|
Swami S, Suthar S, Singh R, Thakur AK, Gupta LR, Sikarwar VS. Potential of ionic liquids as emerging green solvent for the pretreatment of lignocellulosic biomass. Environ Sci Pollut Res Int 2024; 31:12871-12891. [PMID: 38285255 DOI: 10.1007/s11356-024-32100-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Accepted: 01/17/2024] [Indexed: 01/30/2024]
Abstract
Lignocellulosic biomass is available in abundance as a renewable resource, but the major portion of it is often discarded as waste without utilizing its immense potential as an alternative renewable energy resource. To overcome recalcitrance of lignocellulosic biomass, various pretreatment methods are applied to it, so that the complex and rigid polymeric structure can be broken down into fractions susceptible for enzymatic hydrolysis. Effective and efficient biomass processing is the goal of pretreatment methods, but none of the explored pretreatment methods are versatile enough to fulfil the requirement of biomass processing with greater flexibility in terms of operational cost and desired output efficiency. Deployment of green solvents such as ionic liquids for the pretreatment of lignocellulosic biomass has been a topic of discussion amongst the scientific community in recent times. The presented work provides a detailed overview on the deployment of ionic liquid for the pretreatment of lignocellulosic biomass coupled with a brief discussion on other pretreatments methods. The recyclability and reusability along with other unique properties makes an ionic liquid pretreatment different from the other traditional pretreatment methods. Also, this study explores diverse critical parameters that governs the dissolution process of biomass. Hazardous properties of ionic liquids have also been explored. Future perspective and recommendations have been given for an efficient, effective, and eco-friendly deployment of ionic liquid in biomass pretreatment process.
Collapse
Affiliation(s)
- Siddharth Swami
- School of Environment & Natural Resources, Doon University, Dehradun, 248001, Uttarakhand, India
| | - Surindra Suthar
- School of Environment & Natural Resources, Doon University, Dehradun, 248001, Uttarakhand, India
| | - Rajesh Singh
- Division of Research & Innovation, Uttaranchal Institute of Technology, Uttaranchal University, Dehradun, 248007, India
| | - Amit Kumar Thakur
- Department of Mechanical Engineering, Lovely Professional University, Phagwara, 144001, India
| | - Lovi Raj Gupta
- Department of Mechanical Engineering, Lovely Professional University, Phagwara, 144001, India
| | - Vineet Singh Sikarwar
- Institute of Plasma Physics of the Czech Academy of Sciences, Za Slovankou 1782/3, 182 00, Prague 8, Czech Republic.
- Department of Power Engineering, University of Chemistry and Technology Prague, Technická 5, 166 28, Prague 6, Czech Republic.
| |
Collapse
|
26
|
Razavian Tabari SR, Salahinejad E. Selective recovery of gold and silver from electronic wastes through a sequential process of Qalkari and room-temperature hydrometallurgy. J Environ Manage 2024; 351:119778. [PMID: 38086113 DOI: 10.1016/j.jenvman.2023.119778] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 11/16/2023] [Accepted: 12/03/2023] [Indexed: 01/14/2024]
Abstract
This work was focused on the selective recovery of gold and silver from electronic wastes using a sequential process of pyrometallurgy (Qalkari) and room-temperature hydrometallurgy. In the first step, electronic wastes underwent Qalkari recycling, yielding tablets containing precious elements (Qalkari furnace product) and melting slag (Qalkari furnace waste). In the subsequent hydrometallurgy phase, the nitric acid concentration and the input solid amount were optimized for the effective room-temperature recovery of gold. Due to the successful separation of precision elements and disturbing substances in Qalkari, the gold recovery efficiency of 99.99% was obtained at the acid concentration of 50% (v/v) and the solid input of 15% (w/v). Afterwards, HCl, NH4Cl, and NaCl were used for silver recovery from the Qalkari-processed gold-recovered leaching solution, leading to the efficiency of 99.99%. But NH4Cl was recognized as the most effective precipitant as it promises the most enhanced potential for the possible subsequent recovery of palladium. In conclusion, this study draws the effectiveness of Qalkari in recycling electronic wastes, with a significant impact on the efficiency of succeeding room-temperature hydrometallurgical processes for gold and silver recovery within a reasonable leaching time.
Collapse
Affiliation(s)
| | - Erfan Salahinejad
- Faculty of Materials Science and Engineering, K. N. Toosi University of Technology, Tehran, Iran.
| |
Collapse
|
27
|
Liu W, Li Z, Ren Q, Jiang C, Feng J, Hou Q. Upgrading lignin macromolecular by green and recyclable ternary deep eutectic solvents. Bioresour Technol 2024; 394:130230. [PMID: 38141882 DOI: 10.1016/j.biortech.2023.130230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 12/18/2023] [Accepted: 12/18/2023] [Indexed: 12/25/2023]
Abstract
Lignin is the most abundant natural aromatic macromolecule in the nature, but its high value-added utilization has been seriously hindered by the highly random and branched structures and the high difficulty in separation and purification. A microwave-assisted ternary deep eutectic solvent (DES) composed by formic acid, lactic acid and choline chloride was developed for lignin pretreatment. The effects of three types of DES on main characteristics of lignin were investigated, and the corresponding dissolution mechanism was proposed. The results showed that, the microwave-assisted ternary DES pretreatment showed an obvious improvement on main characteristics of regenerated lignin, e.g., a higher purity, lower molecular weight with reduced dispersity, improved thermal stability, higher phenolic hydroxyl content, and increased antioxidative activity in comparison with control. It is expected that the lignin macromolecular can be facile regulated and upgraded by the proposed ternary DES.
Collapse
Affiliation(s)
- Wei Liu
- Tianjin Key Laboratory of Pulp & Paper, Tianjin University of Science & Technology, Tianjin 300457, China; State Key Laboratory of Biobased Fiber Manufacturing Technology, Tianjin University of Science and Technology, Tianjin 300457, China.
| | - Zhan Li
- Tianjin Key Laboratory of Pulp & Paper, Tianjin University of Science & Technology, Tianjin 300457, China
| | - Qian Ren
- Tianjin Key Laboratory of Pulp & Paper, Tianjin University of Science & Technology, Tianjin 300457, China
| | - Chuang Jiang
- Tianjin Key Laboratory of Pulp & Paper, Tianjin University of Science & Technology, Tianjin 300457, China
| | - Jinlong Feng
- Tianjin Key Laboratory of Pulp & Paper, Tianjin University of Science & Technology, Tianjin 300457, China
| | - Qingxi Hou
- Tianjin Key Laboratory of Pulp & Paper, Tianjin University of Science & Technology, Tianjin 300457, China; State Key Laboratory of Biobased Fiber Manufacturing Technology, Tianjin University of Science and Technology, Tianjin 300457, China
| |
Collapse
|
28
|
Zöller L, Avdeef A, Karlsson E, Borde A, Carlert S, Saal C, Dressman J. A comparison of USP 2 and µDISS Profiler™ apparatus for studying dissolution phenomena of ibuprofen and its salts. Eur J Pharm Sci 2024; 193:106684. [PMID: 38154507 DOI: 10.1016/j.ejps.2023.106684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 12/05/2023] [Accepted: 12/25/2023] [Indexed: 12/30/2023]
Abstract
BACKGROUND Pharmaceutical salts of poorly soluble drugs typically dissolve faster than their corresponding free acid or base, resulting in supersaturation under some circumstances. The key questions relevant to drug bioavailability "does the salt invoke the supersaturated state?" and, if so, "does precipitation occur?" remain. To answer these questions, different types of dissolution equipment are often used at different stages of the development process. AIM To compare the dissolution behaviour of ibuprofen and its sodium and lysine salts in the USP 2 apparatus and the µDISS Profiler™ apparatus. The dissolution, supersaturation of the salt forms and precipitation to the free acid of ibuprofen were characterized along with the dissolution of the free acid form. METHODS Media containing different concentrations of the salt-forming counterions - sodium and lysine - were used to investigate the influence of the type of dissolution apparatus used for the study on dissolution, supersaturation and precipitation behaviour. KEY RESULTS Supersaturation was observed for both the sodium and lysinate salts of ibuprofen in all USP 2 apparatus and µDISS Profiler™ experiments. However, precipitation tended to be far greater in the µDISS Profiler™ than in the USP 2 apparatus. The difference was most pronounced in pH 4.5 acetate buffer, in which precipitation was observed exclusively in experiments with the µDISS Profiler™. CONCLUSION Choice of dissolution apparatus can affect the dissolution/supersaturation/precipitation characteristics of pharmaceutical salts. This has to be carefully taken into account when investigating salts over different stages of pharmaceutical research and development.
Collapse
Affiliation(s)
- Laurin Zöller
- Fraunhofer Institute of Translational Medicine and Pharmacology, Theodor-Stern-Kai 7, 60596 Frankfurt am Main, Germany
| | | | - Eva Karlsson
- Oral Product Development, Pharmaceutical Technology & Development, Operations, AstraZeneca Gothenburg, Pepparedsleden 1, 43150 Mölndal, Sweden
| | - Anders Borde
- Oral Product Development, Pharmaceutical Technology & Development, Operations, AstraZeneca Gothenburg, Pepparedsleden 1, 43150 Mölndal, Sweden
| | - Sara Carlert
- Advanced Drug Delivery, Pharmaceutical Sciences, Bio-Pharmaceuticals R&D, AstraZeneca Gothenburg, Pepparedsleden 1, 43150 Mölndal, Sweden
| | - Christoph Saal
- Boehringer Ingelheim Pharma GmbH & Co. KG, Birkendorfer Strasse 65, 88400 Biberach an der Riss, Germany
| | - Jennifer Dressman
- Fraunhofer Institute of Translational Medicine and Pharmacology, Theodor-Stern-Kai 7, 60596 Frankfurt am Main, Germany.
| |
Collapse
|
29
|
Aydoğan S, Motasim M, Ali B. The novelty of silver extraction by leaching in acetic acid with hydrogen peroxide as an organic alternative lixiviant for cyanide. Heliyon 2024; 10:e24784. [PMID: 38312671 PMCID: PMC10835322 DOI: 10.1016/j.heliyon.2024.e24784] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Revised: 01/03/2024] [Accepted: 01/15/2024] [Indexed: 02/06/2024] Open
Abstract
In this article, the dissolution kinetics of pure metallic silver in acetic acid with a hydrogen peroxide solution were carried out. The effects of stirring speed, acetic acid concentration, hydrogen peroxide concentration, and temperature were examined. The results show that increasing the stirring speed decomposes the hydrogen peroxide and negatively affects the dissolution rate of silver. In addition, an acetic acid concentration in the range of 0.25-1 M has a positive effect and a negative effect in the range of 1-3 M. A hydrogen peroxide concentration in the range of 0.5-2 M has a significantly positive effect on the dissolution rate, while it has a negative effect in the range of 2-3 M. The temperature in the range of 61.5-70 °C has a negative effect due to the decomposition of hydrogen peroxide. The shrinking core model was applied to all parameters to obtain the dissolution kinetics. The dissolution process of silver was controlled by the surface reaction-controlled shrinking core model, i.e. 1-(1-X)1/3 = kst, with an activation energy of 28.80 kJ/mol.
Collapse
Affiliation(s)
- Salih Aydoğan
- Department of Mining Engineering, Konya Technical University, 42250, Konya, Turkey
| | - Mahmoud Motasim
- Department of Mining Engineering, Konya Technical University, 42250, Konya, Turkey
- Department of Mining Engineering, Omdurman Islamic University, P.O. BOX Khartoum, Omdurman, 10257, Sudan
| | - Babiker Ali
- Department of Mining Engineering, Konya Technical University, 42250, Konya, Turkey
- Department of Economic Geology and Mining, Red Sea University, Port Sudan, 33315, Sudan
| |
Collapse
|
30
|
Ge X, Fan Y, Zhai H, Chi J, Putnis CV, Wang L, Zhang W. Direct observations of nanoscale brushite dissolution by the concentration-dependent adsorption of phosphate or phytate. Water Res 2024; 248:120851. [PMID: 37976955 DOI: 10.1016/j.watres.2023.120851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 11/05/2023] [Accepted: 11/08/2023] [Indexed: 11/19/2023]
Abstract
With the development of agricultural intensification, phosphorus (P) accumulation in croplands and sediments has resulted in the increasingly widespread interaction between inorganic and organic P species, which has been, previously, underestimated or even ignored. We quantified the nanoscale dissolution kinetics of sparingly soluble brushite (CaHPO4·2H2O, DCPD) over a broad range of phosphate and/or phytate concentrations by using in situ atomic force microscopy (AFM). Compared to water, we found that low concentrations of phosphate (1-1000 µM) or phytate (1-100 µM) inhibited brushite dissolution by slowing single step retraction. However, with increasing phosphate or phytate concentrations to 10 mM, there was a reverse effect of dissolution promotion at brushite-water interfaces. In situ observations of the coupled dissolution-reprecipitation showed that phosphate precipitated more readily than phytate on brushite surfaces, with the formation of amorphous calcium phosphate (ACP). For a fundamental understanding, zeta potential and in situ Raman spectroscopy (RS) revealed that the concentration-dependent dissolution is attributed to the reverse of outer-sphere to inner-sphere adsorption with increasing phosphate or phytate concentrations. In addition, the mineralization of phytate with outer-sphere adsorption by phytase was higher than that with inner-spere adsorption, and the presence of phytate delayed ACP phase transformation to hydroxylapatite (HAP). These in situ observations and analyses may fill the knowledge gaps of interaction between inorganic and organic P species in P-rich terrestrial and aquatic environments, thereby implicating their biogeochemical cycling and the associated availability.
Collapse
Affiliation(s)
- Xinfei Ge
- College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China; Department of Environmental Science, Zhejiang University, Hangzhou 310058, China; Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Hangzhou 310058, China
| | - Yuke Fan
- College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
| | - Hang Zhai
- Department of Civil and Environmental Engineering, University of Wisconsin-Madison, Madison, WI 53706, United States
| | - Jialin Chi
- College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
| | - Christine V Putnis
- Institut für Mineralogie, University of Münster, Münster 48149, Germany; School of Molecular and Life Sciences, Curtin University, Perth 6845, Australia
| | - Lijun Wang
- College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
| | - Wenjun Zhang
- College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China.
| |
Collapse
|
31
|
Ao M, Sun S, Deng T, Li J, Liu T, Tang Y, Wang S, Qiu R. Interaction between chromite and Mn(II/IV) under anoxic, oxic and anoxic-oxic conditions: Dissolution, oxidation and pH dependence. J Environ Manage 2024; 349:119475. [PMID: 37922821 DOI: 10.1016/j.jenvman.2023.119475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 10/09/2023] [Accepted: 10/18/2023] [Indexed: 11/07/2023]
Abstract
Chromite oxidative dissolution has been recognized as an important process leading to elevated Cr(VI) in soil and groundwater. Under natural conditions, direct oxidation of Cr(III) by O2 is very unfavorable, and a critical determinant of Cr(VI) generation in soil and groundwater is the interaction between chromite and Mn(II) or Mn(III/IV) oxides. Here, the effects of Mn(II) or Mn(IV) on the oxidative dissolution of chromite were investigated at pH values of 5, 7 and 9 during anoxic, oxic and anoxic-oxic processes. The results showed that the direct oxidation of Cr(III) by O2 was slow in aqueous-phase system, while the Mn oxides in chromite could oxidize dissolved Cr(III). The added Mn(II) can be catalytically oxidized to MnOOH on the chromite surface only under alkaline oxidation conditions, and the catalytic efficiency is slow, which has less effect on chromite oxidative dissolution. Compared with the direct oxidation of O2 and catalytic oxidation of Mn(II), the synthesized biogenic Mn oxides drove the oxidative dissolution of chromite to release more Cr(VI) and were the main threat to the long-term stability of chromite in the environment. Overall, both acidic and alkaline environments are favorable to the catalytic oxidation of chromite by O2, Mn(II) and δ-MnO2, while neutral conditions are favorable to the long-term stability of chromite. These above processes may occur in soils and sediments with redox fluctuations (e.g., rice paddies, river floodplains, wetlands, and peatlands), and the presence of Mn(II) and Mn(III/IV) may play an important role in the oxidation and mobilization of Cr(III), leading to elevated Cr(VI) levels in soils and groundwater.
Collapse
Affiliation(s)
- Ming Ao
- School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou, 510006, China
| | - Shengsheng Sun
- School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou, 510006, China
| | - Tenghaobo Deng
- Institute of Quality Standard and Monitoring Technology for Agro-products of Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, China
| | - Jingjing Li
- Guangdong Provincial Key Laboratory of Agricultural & Rural Pollution Abatement and Environmental Safety, College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, 510642, China
| | - Ting Liu
- Guangdong Provincial Key Laboratory of Agricultural & Rural Pollution Abatement and Environmental Safety, College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, 510642, China
| | - Yetao Tang
- School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou, 510006, China; Guangdong Provincial Engineering Research Center for Heavy Metal Contaminated Soil Remediation, Sun Yat-sen University, Guangzhou, 510006, China
| | - Shizhong Wang
- School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou, 510006, China; Guangdong Provincial Engineering Research Center for Heavy Metal Contaminated Soil Remediation, Sun Yat-sen University, Guangzhou, 510006, China.
| | - Rongliang Qiu
- School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou, 510006, China; Guangdong Provincial Key Laboratory of Agricultural & Rural Pollution Abatement and Environmental Safety, College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, 510642, China
| |
Collapse
|
32
|
Li B, Qiu L, Zhang J, Liu S, Xu M, Wang J, Yang H. Solubilization of chitosan in biologically relevant solvents by a low-temperature solvent-exchange method for developing biocompatible chitosan materials. Int J Biol Macromol 2024; 254:127950. [PMID: 37951431 PMCID: PMC10843559 DOI: 10.1016/j.ijbiomac.2023.127950] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Revised: 10/05/2023] [Accepted: 10/27/2023] [Indexed: 11/14/2023]
Abstract
Chitosan has great potential for biomedical applications. However, the intractable solubility of chitosan is a major bottleneck hampering its utilization. In this work, we report a low-temperature solvent-exchange method to solubilize chitosan in biologically relevant solvents (bio-solvents) including water, salines, and cell culture media. Chitosan was firstly dissolved in ionic liquid (IL) 1-ethyl-3-methylimidazolium acetate (EMIM Ac). The chitosan/IL solution was then dialyzed against bio-solvents at 4 °C, during which a solvent exchange process took place. At the end of 24 h dialysis, aqueous chitosan pseudosolutions formed. Low temperature is found to be crucial for efficient solubilization of chitosan during the solvent exchange process. Increasing temperature to 50 °C leads to the formation of solid chitosan hydrogel. Chitosan in the water-based pseudosolution presents as positively charged particles. The pseudosolution shows a high positive zeta potential of about +52.6 mV and good colloidal stability. The water-based pseudosolutions with different amounts of chitosan contents exhibit the rheological features of weak liquid gels. By using these pseudosolutions, the fabrication of various chitosan materials is realized readily. Both chitosan pseudosolution and its downstream products are highly biocompatible. In this strategy, using IL as a solvent-medium and processing a low-temperature solvent exchange are the two key parameters to solubilize chitosan.
Collapse
Affiliation(s)
- Boxuan Li
- Tianjin Key Laboratory of Biomedical Materials, Key Laboratory of Biomaterials and Nanotechnology for Cancer Immunotherapy, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin 300192, China
| | - Li Qiu
- College of Biomedical Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Jialuo Zhang
- College of Biomedical Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Shujing Liu
- College of Biomedical Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Mengjie Xu
- College of Biomedical Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Juan Wang
- College of Biomedical Engineering, Sichuan University, Chengdu, Sichuan 610065, China.
| | - Hu Yang
- Linda and Bipin Doshi Department of Chemical and Biochemical Engineering, Missouri University of Science and Technology, Rolla, MO 65409, United States.
| |
Collapse
|
33
|
de Oliveira Neto RS, de Souza Lima LA, Titato PCG, de Andrade FB, Vivan RR, Alcalde MP, Duarte MAH. Effectiveness of a new endodontic irrigation system for removing smear layer and dissolving simulated organic matter. Clin Oral Investig 2023; 28:10. [PMID: 38127289 DOI: 10.1007/s00784-023-05418-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Accepted: 11/27/2023] [Indexed: 12/23/2023]
Abstract
OBJECTIVES The study aimed to evaluate the potential for the dissolution of organic tissue in areas of simulated complexity and cleaning of root canal walls of the new iVac® endodontic irrigation system. MATERIAL AND METHODS Thirty mandibular premolars were evaluated by scanning electron microscopy before and after biomechanical preparation. Then, they were distributed according to the final irrigation protocol into groups with conventional irrigation, ultrasonic agitation with metallic insert (UA), and iVac® system, and new photomicrographs were obtained. For tissue dissolution analysis, glass capillaries filled with catgut were attached to the cervical and apical thirds of twenty-one prototyped upper incisors. They were weighed before and after the previously mentioned irrigation protocols. The data were statistically compared with a significance level of 5%. RESULTS The final irrigation provided greater cleaning of the root canal walls in the cervical, middle, and apical thirds of the root canals (P < 0.05), with no statistically significant difference between UA and iVac®, regardless of the analyzed thirds. Both ultrasonic irrigation protocols dissolved a significantly greater volume than the conventional irrigation protocol (P < 0.05), with no difference between the two protocols (P < 0.05). CONCLUSIONS The iVac® system showed root canal wall cleaning and tissue dissolution similar to UA with a metallic insert, and both were superior to conventional irrigation. CLINICAL RELEVANCE The new irrigation system iVac is more effective than conventional irrigation and has similar root canal wall cleaning and tissue dissolution to UA.
Collapse
Affiliation(s)
- Raimundo Sales de Oliveira Neto
- Department of Operative Dentistry, Endodontics, and Dental Materials, Bauru School of Dentistry, University of São Paulo - USP, Al. Octávio Pinheiro Brizolla 9-75, Vila Universitária Bauru, Bauru, SP, CEP: 17012-901, Brazil.
| | - Luana Arantes de Souza Lima
- Department of Operative Dentistry, Endodontics, and Dental Materials, Bauru School of Dentistry, University of São Paulo - USP, Al. Octávio Pinheiro Brizolla 9-75, Vila Universitária Bauru, Bauru, SP, CEP: 17012-901, Brazil
| | - Pedro Cesar Gomes Titato
- Department of Operative Dentistry, Endodontics, and Dental Materials, Bauru School of Dentistry, University of São Paulo - USP, Al. Octávio Pinheiro Brizolla 9-75, Vila Universitária Bauru, Bauru, SP, CEP: 17012-901, Brazil
| | - Flaviana Bombarda de Andrade
- Department of Operative Dentistry, Endodontics, and Dental Materials, Bauru School of Dentistry, University of São Paulo - USP, Al. Octávio Pinheiro Brizolla 9-75, Vila Universitária Bauru, Bauru, SP, CEP: 17012-901, Brazil
| | - Rodrigo Ricci Vivan
- Department of Operative Dentistry, Endodontics, and Dental Materials, Bauru School of Dentistry, University of São Paulo - USP, Al. Octávio Pinheiro Brizolla 9-75, Vila Universitária Bauru, Bauru, SP, CEP: 17012-901, Brazil
| | - Murilo Priori Alcalde
- Department of Operative Dentistry, Endodontics, and Dental Materials, Bauru School of Dentistry, University of São Paulo - USP, Al. Octávio Pinheiro Brizolla 9-75, Vila Universitária Bauru, Bauru, SP, CEP: 17012-901, Brazil
| | - Marco Antonio Hungaro Duarte
- Department of Operative Dentistry, Endodontics, and Dental Materials, Bauru School of Dentistry, University of São Paulo - USP, Al. Octávio Pinheiro Brizolla 9-75, Vila Universitária Bauru, Bauru, SP, CEP: 17012-901, Brazil
| |
Collapse
|
34
|
Tong Z, Liu X, Tao Y, Feng P, Luan F, Jie X, Xie Z, Pu F, Xu Z, Wang P. Enhancement of dissolution and oral bioavailability by adjusting microenvironment pH in crocetin ternary solid dispersions: Optimization, characterization, in vitro evaluation, and pharmacokinetics. Drug Deliv Transl Res 2023:10.1007/s13346-023-01497-3. [PMID: 38117406 DOI: 10.1007/s13346-023-01497-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/11/2023] [Indexed: 12/21/2023]
Abstract
The most promising active ingredient of Crocus sativus L., crocetin (CCT), has been demonstrated to possess many biological activities. However, only a few studies have been conducted on CCT formulation, especially in oral formulation, mainly due to its insolubility in water, which limits its application for oral administration. This article reports an equilibrium saturation solubility and single-pass intestinal perfusion studies conducted to classify the biopharmaceutics classification system (BCS) of CCT. To enhance in vitro dissolution and in vivo oral bioavailability, ternary solid dispersions of CCT (CCT-SDs) with soluplus (SOL) as hydrophilic carrier and meglumine (MEG) as alkalizer were optimized using response surface methodology (RSM) with central composite design (CCD) experiments. Four different preparation methods were evaluated using the optimal formulation, including solvent evaporation, ball milling, spray drying, and freeze-drying. Prepared formulations were characterized by TG-DSC, FTIR, X-RPD, and SEM; the pharmacokinetic studies were performed in rats after oral administration. The cumulative dissolution rate of CCT-SDs containing SOL and MEG prepared by the ball milling method was 97.1% at 15 min and remained at 95.6% at 480 min, which was significantly higher than that of untreated CCT. The lower crystallinity, smaller particle size, and higher microenvironment pH (pHM) were observed in CCT-SDs prepared by the ball milling method. In vivo absorption of CCT-SDs (Cmax = 52.789 ± 12.441 μg/mL and AUC0-12 = 191.748 ± 35.043 μg/mL·h) was greater than untreated CCT (Cmax = 5.918 ± 1.388 μg/mL and AUC0-12 = 44.309 ± 7.264 μg/mL·h). In conclusion, the current study provides ternary solid dispersion formulation of CCT to increase the in vitro dissolution and in vivo bioavailability, which will benefit the commercial production and future clinical applications of CCT.
Collapse
Affiliation(s)
- Zheren Tong
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Xianyin Liu
- College of Pharmaceutical Sciences, Jiangxi Medical College, Shangrao, 334000, China
| | - Yi Tao
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Peishi Feng
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Fujia Luan
- College of Pharmaceutical Sciences, Jiangxi Medical College, Shangrao, 334000, China
| | - Xiaolu Jie
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Zhangfu Xie
- Zhejiang Suichang Liming Pharmaceutical Co., LTD, Suichang, 323300, China
| | - Faxiang Pu
- Zhejiang Suichang Liming Pharmaceutical Co., LTD, Suichang, 323300, China
| | - Zijin Xu
- College of Pharmaceutical Sciences, Jiangxi Medical College, Shangrao, 334000, China.
| | - Ping Wang
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, 310014, China.
| |
Collapse
|
35
|
Sun S, Deng T, Ao M, Mo Y, Li J, Liu T, Yang W, Jin C, Qiu R, Tang Y. Release of chromium from Cr(III)- and Ni(II)-substituted goethite in presence of organic acids: Role of pH in the formation of colloids and complexes. Sci Total Environ 2023; 904:166979. [PMID: 37699483 DOI: 10.1016/j.scitotenv.2023.166979] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Revised: 09/08/2023] [Accepted: 09/09/2023] [Indexed: 09/14/2023]
Abstract
High levels of Cr(III) are hosted in Fe (oxyhydr)oxides in soils derived on (ultra)mafic rocks, which can pose potential risks to the environment. Organic acids can cause the solubilization of Fe (oxyhydr)oxides and the release of Cr(III). However, the release behaviors of Cr(III) from Fe (oxyhydr)oxides by organic acids and its main factors remain unclear. This study investigates the speciation of Cr released from Cr(III)-substituted goethite in the presence of citrate and oxalate and the effects of pH (3-7). Batch experiments showed that Fe(III) and Cr(III) dissolution were significantly enhanced by citrate and oxalate, and the extent of dissolution was negatively correlated with pH. When at relatively high pH (5-7), AF4-ICP-MS results revealed that large proportions of dissolved Fe (>58 %) and Cr (18 %-73 %) were presented in the form of Cr(III)-citrate colloids in the sizes of 1-125 nm and 125-350 nm. Further, FTIR and cryogenic XPS characterization demonstrated that the formation of·Cr(III)-citrate colloids was attributed to the adsorption and complexation of citrate on the substituted goethite surface. However, Cr was mainly released as soluble Cr(III)-organic complexes when presented at pH 3. While low pH inhibited the formation of Cr(III)-organic colloids, it promoted the release of Cr by facilitating the dissociation of surface Cr(III)-organic complexes. In addition, the incorporation of Ni(II) in Cr(III)-substituted goethite weakened the adsorption of organic acid by shortening the crystal size of goethite, thus significantly inhibiting the formation of Cr(III)-organic complexes and colloids. This study confirms the formation of Cr(III)-organic acid colloids and highlights the importance of pH on Cr release behavior, which is essential for evaluating Cr transport and fate in soils with high background values.
Collapse
Affiliation(s)
- Shengsheng Sun
- Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China; Institute of Quality Standard and Monitoring Technology for Agro-products of Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
| | - Tenghaobo Deng
- Institute of Quality Standard and Monitoring Technology for Agro-products of Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
| | - Ming Ao
- Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China
| | - Yijun Mo
- Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China
| | - Jingjing Li
- Guangdong Provincial Key Laboratory of Agricultural & Rural Pollution Abatement and Environmental Safety, College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China
| | - Ting Liu
- Guangdong Provincial Key Laboratory of Agricultural & Rural Pollution Abatement and Environmental Safety, College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China
| | - Wenjun Yang
- Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China.
| | - Chao Jin
- Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China
| | - Rongliang Qiu
- Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, China; Guangdong Provincial Key Laboratory of Agricultural & Rural Pollution Abatement and Environmental Safety, College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China
| | - Yetao Tang
- Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, China
| |
Collapse
|
36
|
Nandi S, Padrela L, Tajber L, Collas A. Development of long-acting injectable suspensions by continuous antisolvent crystallization: An integrated bottom-up process. Int J Pharm 2023; 648:123550. [PMID: 37890647 DOI: 10.1016/j.ijpharm.2023.123550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Revised: 08/27/2023] [Accepted: 10/23/2023] [Indexed: 10/29/2023]
Abstract
Our present work elucidated the operational feasibility of direct generation and stabilization of long-acting injectable (LAI) suspensions of a practically insoluble drug, itraconazole (ITZ), by combining continuous liquid antisolvent crystallization with downstream processing (i.e., centrifugal filtration and reconstitution). A novel microchannel reactor-based bottom-up crystallization setup was assembled and optimized for the continuous production of micro-suspension. Based upon the solvent screening and solubility study, N-methyl pyrrolidone (NMP) was selected as the optimal solvent and an impinging jet Y-shaped microchannel reactor (MCR) was selected as the fluidic device to provide a reproducible homogenous mixing environment. Operating parameters such as solvent to antisolvent ratio (S/AS), total jet liquid flow rates (TFRs), ITZ feed solution concentration and the maturation time in spiral tubing were tailored to 1:9 v/v, 50 mL/min, 10 g/100 g solution, and 96 h, respectively. Vitamin E TPGS (0.5% w/w) was found to be the most suitable excipient to stabilize ITZ particles amongst 14 commonly used stabilizers screened. The effect of scaling up from 25 mL to 15 L was evaluated effectively with in situ monitoring of particle size distribution (PSD) and solid-state form. Thereafter, the suspension was subjected to centrifugal filtration to remove excess solvent and increase ITZ solid fraction. As an alternative, an even more concentrated wet pellet was reconstituted with an aqueous solution of 0.5% w/w Vitamin E TPGS as resuspending agent. The ITZ LAI suspension (of 300 mg/mL solid concentration) has the optimal PSD with a D10 of 1.1 ± 0.3 µm, a D50 of 3.53 ± 0.4 µm and a D90 of 6.5 ± 0.8 µm, corroborated by scanning electron microscopy (SEM), as remained stable after 548 days of storage at 25 °C. Finally, in vitro release methods using Dialyzer, dialysis membrane sac were investigated for evaluation of dissolution of ITZ LAI suspensions. The framework presented in this manuscript provides a useful guidance for development of LAI suspensions by an integrated bottom-up approach using ITZ as model API.
Collapse
Affiliation(s)
- Snehashis Nandi
- Chemical and Pharmaceutical Development & Supply, Janssen Research & Development, Beerse, Belgium; Department of Chemical Sciences, Bernal Institute, University of Limerick, Limerick V94 T9PX, Ireland; SSPC, The SFI Research Centre for Pharmaceuticals, Department of Chemical Sciences, Bernal Institute, University of Limerick, Ireland
| | - Luis Padrela
- Department of Chemical Sciences, Bernal Institute, University of Limerick, Limerick V94 T9PX, Ireland; SSPC, The SFI Research Centre for Pharmaceuticals, Department of Chemical Sciences, Bernal Institute, University of Limerick, Ireland
| | - Lidia Tajber
- SSPC, The SFI Research Centre for Pharmaceuticals, Department of Chemical Sciences, Bernal Institute, University of Limerick, Ireland; School of Pharmacy and Pharmaceutical Sciences, Trinity College Dublin, College Green, Dublin 2, Ireland
| | - Alain Collas
- Chemical and Pharmaceutical Development & Supply, Janssen Research & Development, Beerse, Belgium.
| |
Collapse
|
37
|
Peng J, Huang Y, Fu R, Lu J, Wang W, Zhu W, Yu Y, Guo F, Mai H. Microscopic dissolution process of cellulose in alkaline aqueous solvents and its application in CNFs extraction - Investigating temperature as a variable. Carbohydr Polym 2023; 322:121361. [PMID: 37839827 DOI: 10.1016/j.carbpol.2023.121361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Revised: 08/23/2023] [Accepted: 08/30/2023] [Indexed: 10/17/2023]
Abstract
The target of this study is to gain a deeper understanding of the micro-dissolution process of cellulose in alkaline aqueous solutions and to develop a novel method for extracting cellulose nanofibrils (CNFs). Herein, the dissolution process of cellulose in alkaline aqueous solutions will be controlled by varying the temperature, and the undissolved cellulose will be analyzed to reveal the microscopic dissolution process of cellulose, and a novel process for extracting cellulose nanofibrils (CNFs) will be developed based on the findings. The crystalline structure of cellulose was gradually disrupted as the dissolution progressed, and the crystal form of cellulose changed gradually from cellulose I to cellulose II during the dissolution process, while all undissolved cellulose crystals remained as cellulose I. Cellulose, after its structure is disrupted during the dissolution process, will inevitably decompose into CNFs, and the microscopic dissolution process of cellulose follows a "top-down" dissolution sequence. The CNFs extraction method developed in this study can extract CNFs with high yield (>60 %) in a stable manner, as well as narrow particle size distribution, high crystallinity (>77 %), and good thermal stability. This study enhances the comprehension of the dissolution process of cellulose and paves a possible way for industrialization of CNFs production.
Collapse
Affiliation(s)
- Jinping Peng
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China; Jieyang Branch of Chemistry and Chemical Engineering Guangdong Laboratory, Jieyang 515200, China
| | - Yihui Huang
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
| | - Rongwei Fu
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
| | - Jinqing Lu
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
| | - Weiquan Wang
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
| | - Wentao Zhu
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
| | - Yuxuan Yu
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
| | - Fan Guo
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
| | - Haiyan Mai
- Department of Pharmacy, Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China.
| |
Collapse
|
38
|
Pöstges F, Lenhart J, Stoyanov E, Lunter DJ, Wagner KG. Phase homogeneity in ternary amorphous solid dispersions and its impact on solubility, dissolution and supersaturation - Influence of processing and hydroxypropyl cellulose grade. Int J Pharm X 2023; 6:100222. [PMID: 38162398 PMCID: PMC10755049 DOI: 10.1016/j.ijpx.2023.100222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 11/13/2023] [Accepted: 12/01/2023] [Indexed: 01/03/2024] Open
Abstract
As performance of ternary amorphous solid dispersions (ASDs) depends on the solid-state characteristics and polymer mixing, a comprehensive understanding of synergistic interactions between the polymers in regard of dissolution enhancement of poorly soluble drugs and subsequent supersaturation stabilization is necessary. By choosing hot-melt extrusion (HME) and vacuum compression molding (VCM) as preparation techniques, we manipulated the phase behavior of ternary efavirenz (EFV) ASDs, comprising of either hydroxypropyl cellulose (HPC)-SSL or HPC-UL in combination with Eudragit® L 100-55 (EL 100-55) (50:50 polymer ratio), leading to single-phased (HME) and heterogeneous ASDs (VCM). Due to higher kinetic solid-state solubility of EFV in HPC polymers compared to EL 100-55, we visualized higher drug distribution into HPC-rich phases of the phase-separated ternary VCM ASDs via confocal Raman microscopy. Additionally, we observed differences in the extent of phase-separation in dependence on the selected HPC grade. As HPC-UL exhibited decisive lower melt viscosity than HPC-SSL, formation of partially miscible phases between HPC-UL and EL 100-55 was facilitated. Consequently, as homogeneously mixed polymer phases were required for optimal extent of solubility improvement, the manufacturing-dependent differences in dissolution performances were smaller using HPC-UL, instead of HPC-SSL, i.e. using HPC-UL was less demanding on shear stress provided by the process.
Collapse
Affiliation(s)
- Florian Pöstges
- Department of Pharmaceutical Technology and Biopharmaceutics, University of Bonn, Gerhard-Domagk-Str. 3, 53121 Bonn, Germany
| | - Jonas Lenhart
- Department of Pharmaceutical Technology, Faculty of Sciences, University of Tübingen, Auf d. Morgenstelle 8, 72076 Tübingen, Germany
| | - Edmont Stoyanov
- Nisso Chemical Europe GmbH, Berliner Allee 42, 40212 Düsseldorf, Germany
| | - Dominique J. Lunter
- Department of Pharmaceutical Technology, Faculty of Sciences, University of Tübingen, Auf d. Morgenstelle 8, 72076 Tübingen, Germany
| | - Karl G. Wagner
- Department of Pharmaceutical Technology and Biopharmaceutics, University of Bonn, Gerhard-Domagk-Str. 3, 53121 Bonn, Germany
| |
Collapse
|
39
|
Grumann HD, Kleinebudde P. Effect of tableting temperature on tablet properties and dissolution behavior of heat sensitive formulations. Int J Pharm 2023; 648:123603. [PMID: 37967689 DOI: 10.1016/j.ijpharm.2023.123603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Revised: 11/03/2023] [Accepted: 11/11/2023] [Indexed: 11/17/2023]
Abstract
The tableting process involves the conversion of mechanical to thermal energy. This study evaluated the influence of temperature on the tableting behavior of formulations with different compositions. The tableting machine was equipped with a thermally controlled die to mimic the heat evolution from tableting on an industrial scale. Six formulations containing binders with a comparably low glass transition temperature were examined. Besides the polymer type and concentration, the filler was varied. Paracetamol was chosen as the model active pharmaceutical ingredient. The investigation included alterations in tabletability, disintegration and dissolution. Elevated temperatures led to an enhanced tabletability. The polymer type and concentration were decisive for the extent of alterations. The variation of the filler composition played a minor role due to the high melting points of its components. The results were confirmed in disintegration and dissolution studies. A high binding capacity and a low glass transition temperature resulted in a stronger delay of disintegration. The dissolution was sustained. Increased concentrations of the binding polymer enhanced the effect. If the tableting behavior of a formulation is changed by elevated temperatures during formulation development and production, a change of the binder type or concentration should be considered to ensure a reproducible tablet quality.
Collapse
Affiliation(s)
- Hanna Dorothea Grumann
- Heinrich Heine University, Institute of Pharmaceutics and Biopharmaceutics, Universitaetsstraße 1, 40225 Duesseldorf, Germany
| | - Peter Kleinebudde
- Heinrich Heine University, Institute of Pharmaceutics and Biopharmaceutics, Universitaetsstraße 1, 40225 Duesseldorf, Germany.
| |
Collapse
|
40
|
Li D, Chen Y, Xie Y, Feng Q. Direct dissolution of unbleached pulp from corncob and wheat straw in N-methylmorpholine-N-oxide. Int J Biol Macromol 2023; 252:126485. [PMID: 37625753 DOI: 10.1016/j.ijbiomac.2023.126485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 08/07/2023] [Accepted: 08/22/2023] [Indexed: 08/27/2023]
Abstract
Lignocellulose, as a kind of abundant natural resource, continuously developed to convert high value-added biological products is of great significance. Herein, we report a N-methylmorpholine-N-oxide (NMMO) solvent system to completely dissolve unbleached pulp to prepare a renewable lignin-containing cellulose film. The viscosity of the completely dissolved cellulose solution was measured using a high-pressure rotary rheometer. The shear viscosity exceeded 85 Pa·s at a shear rate of 1.62 s-1. It exhibited shear-thinning non-Newtonian fluid behavior with increasing shear rate. CF-WS had excellent tensile strength (>73 MPa), and exhibited unique optical properties of high transmittance in the visible region and high shielding performance in the ultraviolet region. When the thickness is only 0.016 mm, the UV shielding rate exceeds 75 % (λ < 380 nm). The structure of the bioplastic was revealed by SEM, XPS, and Raman spectroscopy. Directly dissolving lignocellulose in NMMO aqueous solution is expected to yield bioplastics with high strength and biodegradability. It is a potential substitute for petrochemical plastics and provides a possible way for the utilization of agricultural waste.
Collapse
Affiliation(s)
- Dongyong Li
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Hubei University of Technology, Wuhan 430068, China
| | - Yiruo Chen
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Hubei University of Technology, Wuhan 430068, China
| | - Yimin Xie
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Hubei University of Technology, Wuhan 430068, China
| | - Qinghua Feng
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Hubei University of Technology, Wuhan 430068, China.
| |
Collapse
|
41
|
Chaves Júnior JV, Ayala AP, Pontes DDL, de Souza FS, Aragão CFS. A Metformin-Ferulic Acid Salt with Improved Biopharmaceutical Parameters. J Pharm Sci 2023; 112:3120-3130. [PMID: 37451318 DOI: 10.1016/j.xphs.2023.07.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 06/27/2023] [Accepted: 07/07/2023] [Indexed: 07/18/2023]
Abstract
Though ferulic acid presents great hypoglycemic potential, it possesses limited aqueous solubility, and low oral bioavailability. When associated with metformin, the first-choice drug in Type 2 diabetes treatment, FA demonstrates synergistic hypoglycemic effects, however, it also causes certain undesirable dose-related effects. This study aimed to develop a new ferulic acid - metformin multicomponent system, and incorporate it into a solid dosage form with improved biopharmaceutical parameters. A novel metformin: ferulate (1:1) salt (MFS) was produced, which was properly characterized using differing analytical techniques, including single crystal analysis. Also during the course of the study, a new polymorph of the metformin free base was observed. The MFS was obtained using solvent evaporation methods, which achieved high yields in reproducible process, as well as a 740-fold increase in ferulic acid aqueous solubility. The MFS tablets developed met quality control requirements for this dosage form, as well as revealing excellent performance in vitro dissolution tests, presenting dissolution efficiency values of 95.4 ± 0.5%. Additionally, physicochemical instability was not observed in a study at 40 °C for 3 months for both MFS powder and its tablet form. The MFS product developed is a promising candidate for further Type 2 diabetes clinical study.
Collapse
Affiliation(s)
- José Venâncio Chaves Júnior
- Pharmacy Department, Federal University of Rio Grande do Norte, 59010-115, Natal, Brazil; Pharmaceutical Sciences Department, Federal University of Paraíba, 58051-970, João Pessoa, Brazil.
| | | | - Daniel de Lima Pontes
- Institute of Chemistry, Federal University of Rio Grande do Norte, 59010-115, Natal, Brazil
| | - Fábio Santos de Souza
- Pharmaceutical Sciences Department, Federal University of Paraíba, 58051-970, João Pessoa, Brazil
| | | |
Collapse
|
42
|
Miranda Dos Santos E, Ferraz HG, Issa MG, Duque MD. Development of Extended-Release Formulations Containing Cyclobenzaprine Based on Physiologically Based Biopharmaceutics Modeling and Bioequivalence Safe Space. J Pharm Sci 2023; 112:3131-3140. [PMID: 37473918 DOI: 10.1016/j.xphs.2023.07.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 07/12/2023] [Accepted: 07/12/2023] [Indexed: 07/22/2023]
Abstract
The use of physiologically based biopharmaceutics modeling (PBBM) and bioequivalence safe space is increasingly common for immediate-release drug products. However, for extended-release (ER) formulations there are only a few examples of this application. In this study, we developed ER formulations containing cyclobenzaprine 15 mg, supported by PBBM and bioequivalence safe space. Four formulations were prepared, F1, F2, F3 (ER mini-tablet formulations) and F4 (ER tablet formulation), and the dissolution profiles were evaluated. The dissolution profile of the reference drug product was also evaluated and used to set a bioequivalence safe space. A PBBM was set up, evaluated, and used to predict the in vivo behavior of the formulations. The bioequivalence safe space was calculated to be between - 25% and + 75% of the k1 and Tlag values of the dissolution profile of the reference drug product when applying the first-order dissolution kinetic model. All time points of the dissolution profile of the ER mini-tablet formulation F2, were within the safe space, and was approved in 10 of 10 trials of crossover virtual bioequivalence studies. Based on the PBBM strategy and bioequivalence safe space, it was possible to develop an ER mini-tablet formulation virtually bioequivalent to the reference drug product, even though this formulation failed the f2 test.
Collapse
Affiliation(s)
- Everton Miranda Dos Santos
- Department of Pharmaceutical Sciences, Institute of Environmental, Chemical and Pharmaceutical Sciences, Universidade Federal de São Paulo, UNIFESP, Rua São Nicolau, 210, Centro, Diadema, 09913-030, SP, Brazil
| | - Humberto Gomes Ferraz
- Departament of Pharmacy, Faculty of Pharmaceutical Sciences, Universidade de São Paulo, USP, Av. Prof. Lineu Prestes, 580, São Paulo, 05508-080, SP, Brazil
| | - Michele Georges Issa
- Departament of Pharmacy, Faculty of Pharmaceutical Sciences, Universidade de São Paulo, USP, Av. Prof. Lineu Prestes, 580, São Paulo, 05508-080, SP, Brazil
| | - Marcelo Dutra Duque
- Department of Pharmaceutical Sciences, Institute of Environmental, Chemical and Pharmaceutical Sciences, Universidade Federal de São Paulo, UNIFESP, Rua São Nicolau, 210, Centro, Diadema, 09913-030, SP, Brazil.
| |
Collapse
|
43
|
Mohapatra D, Kumar DN, Shreya S, Pandey V, Dubey PK, Agrawal AK, Sahu AN. Quality by design-based development and optimization of fourth-generation ternary solid dispersion of standardized Piper longum extract for melanoma therapy. Drug Deliv Transl Res 2023; 13:3094-3131. [PMID: 37294426 DOI: 10.1007/s13346-023-01375-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/25/2023] [Indexed: 06/10/2023]
Abstract
The study aimed to enhance the solubility, dissolution, and oral bioavailability of standardized Piper longum fruits ethanolic extract (PLFEE) via fourth-generation ternary solid dispersion (SD) for melanoma therapy. With the use of solvent evaporation method, the standardized PLFEE was formulated into SD, optimized using Box-Wilson's central composite design (CCD), and evaluated for pharmaceutical performance and in vivo anticancer activity against melanoma (B16F10)-bearing C57BL/6 mice. The optimized SD showed good accelerated stability, high yield, drug content, and content uniformity for bioactive marker piperine (PIP). The X-ray diffraction (XRD), differential scanning calorimetry (DSC), polarized light microscopy (PLM), and selected area electron diffraction (SAED) analysis revealed its amorphous nature. The attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR) and high-performance thin layer chromatography (HPTLC) revealed the compatibility of excipients with the PLFEE. The contact angle measurement and in vitro dissolution study revealed excellent wetting of SD and improved dissolution profile as compared to the plain PLFEE. The in vivo oral bioavailability of SD reflected a significant (p < 0.05) improvement in bioavailability (Frel = 188.765%) as compared to plain extract. The in vivo tumor regression study revealed the improved therapeutic activity of SD as compared to plain PLFEE. Further, the SD also improved the anticancer activity of dacarbazine (DTIC) as an adjuvant therapy. The overall result revealed the potential of developed SD for melanoma therapy either alone or as an adjuvant therapy with DTIC.
Collapse
Affiliation(s)
- Debadatta Mohapatra
- Phytomedicine Research Laboratory, Department of Pharmaceutical Engineering & Technology, IIT (BHU), Uttar Pradesh, Varanasi, 221005, India
| | - Dulla Naveen Kumar
- Nanomedicine Research Laboratory, Department of Pharmaceutical Engineering & Technology, IIT (BHU), Uttar Pradesh, Varanasi, 221005, India
| | - Singh Shreya
- Phytomedicine Research Laboratory, Department of Pharmaceutical Engineering & Technology, IIT (BHU), Uttar Pradesh, Varanasi, 221005, India
| | - Vivek Pandey
- Centre for Genetics Disorders, Institute of Science (BHU), Uttar Pradesh, Varanasi, 221005, India
| | - Pawan K Dubey
- Centre for Genetics Disorders, Institute of Science (BHU), Uttar Pradesh, Varanasi, 221005, India
| | - Ashish Kumar Agrawal
- Nanomedicine Research Laboratory, Department of Pharmaceutical Engineering & Technology, IIT (BHU), Uttar Pradesh, Varanasi, 221005, India
| | - Alakh N Sahu
- Phytomedicine Research Laboratory, Department of Pharmaceutical Engineering & Technology, IIT (BHU), Uttar Pradesh, Varanasi, 221005, India.
| |
Collapse
|
44
|
Malheiro C, Prodana M, Cardoso DN, Soares AMVM, Morgado RG, Loureiro S. Soil habitat function after innovative nanoagriproducts application: Effect of ageing on the avoidance behaviour of the soil invertebrates Enchytraeus crypticus and Folsomia candida. Sci Total Environ 2023; 901:165955. [PMID: 37536601 DOI: 10.1016/j.scitotenv.2023.165955] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 07/28/2023] [Accepted: 07/30/2023] [Indexed: 08/05/2023]
Abstract
Research on nanotechnology with applications in agriculture has been gathering attention because it may achieve a good balance between agricultural production and environmental integrity. Among the vast nanomaterials, layered double hydroxides (LDHs) are a promising solution for supplying crops with macro- and/or micronutrients. Still, little is known about their safety implications for non-target organisms, such as soil invertebrates. The habitat function of soils might be impacted by potential stressors, which can be assessed through avoidance behaviour tests. This study aimed to assess the effect of two innovative agriproducts, Zn-Al-NO3 LDH and Mg-Al-NO3 LDH, on the avoidance behaviour of the enchytraeid Enchytraeus crypticus and the collembolan Folsomia candida, over time. Simultaneously, Zn and Mg potential release from LDHs to soil was evaluated. Overall, the behaviour of soil invertebrates differed between species, with enchytraeids being more sensitive to LDHs-treated soils than collembolans, possibly explained by their different physiological traits. The behaviour of soil organisms also depended on the LDH structural composition and was time-variable. Soil treated with Zn-Al-NO3 LDH was perceived as less favourable compared to Mg-Al-NO3 LDH, which was preferred to clean soil at most tested concentrations. LDHs toxicity was partly, but not exclusively, related to Zn and Mg release. Cations release over time was demonstrated in the chemical assessment. Still, LDHs toxicity to soil invertebrates decreased as increasing AC50 values were derived over time. Slower dissolution over time might explain the decrease in toxicity. Our study demonstrates that both soil invertebrates could sense LDHs in soil and eventually adapt their behaviour by avoiding or preferring, according to the type and level of LDH present.
Collapse
Affiliation(s)
- C Malheiro
- CESAM - Centre for Environmental and Marine Studies & Department of Biology, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal.
| | - M Prodana
- CESAM - Centre for Environmental and Marine Studies & Department of Biology, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - D N Cardoso
- CESAM - Centre for Environmental and Marine Studies & Department of Biology, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - A M V M Soares
- CESAM - Centre for Environmental and Marine Studies & Department of Biology, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - R G Morgado
- CESAM - Centre for Environmental and Marine Studies & Department of Biology, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - S Loureiro
- CESAM - Centre for Environmental and Marine Studies & Department of Biology, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| |
Collapse
|
45
|
Švára D, Filipová B, Jelínek P, Mikeš P, Kluk A, Šoóš M. The impact of polymer mixture composition on the properties of electrospun membranes for drug delivery applications. Int J Pharm 2023; 647:123548. [PMID: 37890644 DOI: 10.1016/j.ijpharm.2023.123548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Revised: 09/29/2023] [Accepted: 10/23/2023] [Indexed: 10/29/2023]
Abstract
Orally dispersible films (ODFs) prepared by an electrospinning are a novel type of pharmaceutical formulation. This dosage form has the potential to be beneficial for small children and the elderly, who can have problems with administration of classical tablets due to the increased risk of choking and difficulty with swallowing. Due to the highly porous nanofiber morphology, the ODFs examined in this study achieve rapid disintegration into drug microparticles when in contact with saliva. The suspension is then easier to swallow. In this study, we focus on the impact of film composition (polymer matrix composition) on the properties of electrospun membranes. In particular, we prepared ODFs composed of a mixture of PEG 100 000 with HPMC E5 and PVP k90 with HPMC E5. We found significant differences in the structure of electrospinned membranes, where samples containing PEG 100 000 and HPMC E5 exhibited much narrower distribution of fibers. Furthermore, nanofibers containing PVP k90 exhibit a faster disintegration rate, while dissolution of the drug was faster in the case of PEG 100 000 containing ODFs. The improvement was caused by both the structure and composition of the membranes.
Collapse
Affiliation(s)
- Dominik Švára
- Department of Chemical Engineering, University of Chemistry and Technology, Technická 3, 166 28 Prague 6 - Dejvice, Czech Republic
| | - Barbora Filipová
- Department of Physics, Faculty of Science, Humanities and Education, Technical University of Liberec, Studentská 1402/2, 461 17 Liberec, Czech Republic
| | - Petr Jelínek
- Department of Chemical Engineering, University of Chemistry and Technology, Technická 3, 166 28 Prague 6 - Dejvice, Czech Republic
| | - Petr Mikeš
- Department of Physics, Faculty of Science, Humanities and Education, Technical University of Liberec, Studentská 1402/2, 461 17 Liberec, Czech Republic
| | - Anna Kluk
- Zentiva, k.s., U Kabelovny 130, 102 00 Prague 10, Czech Republic
| | - Miroslav Šoóš
- Department of Chemical Engineering, University of Chemistry and Technology, Technická 3, 166 28 Prague 6 - Dejvice, Czech Republic.
| |
Collapse
|
46
|
Wu C, Li J, Zhang YQ, Li X, Wang SY, Li DQ. Cellulose Dissolution, Modification, and the Derived Hydrogel: A Review. ChemSusChem 2023; 16:e202300518. [PMID: 37501498 DOI: 10.1002/cssc.202300518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 07/26/2023] [Accepted: 07/27/2023] [Indexed: 07/29/2023]
Abstract
The cellulose-based hydrogel has occupied a pivotal position in almost all walks of life. However, the native cellulose can not be directly used for preparing hydrogel due to the complex non-covalent interactions. Some literature has discussed the dissolution and modification of cellulose but has yet to address the influence of the pretreatment on the as-prepared hydrogels. Firstly, the "touching" of cellulose by derived and non-derived solvents was introduced, namely, the dissolution of cellulose. Secondly, the "conversion" of functional groups on the cellulose surface by special routes, which is the modification of cellulose. The above-mentioned two parts were intended to explain the changes in physicochemical properties of cellulose by these routes and their influences on the subsequent hydrogel preparation. Finally, the "reinforcement" of cellulose-based hydrogels by physical and chemical techniques was summarized, viz., improving the mechanical properties of cellulose-based hydrogels and the changes in the multi-level structure of the interior of cellulose-based hydrogels.
Collapse
Affiliation(s)
- Chao Wu
- Xinjiang Key Laboratory of Agricultural Chemistry and Biomaterials, College of Chemistry and Chemical Engineering, Xinjiang Agricultural University, Urumchi, 830052, Xinjiang, People's Republic of China
| | - Jun Li
- Xinjiang Key Laboratory of Agricultural Chemistry and Biomaterials, College of Chemistry and Chemical Engineering, Xinjiang Agricultural University, Urumchi, 830052, Xinjiang, People's Republic of China
| | - Yu-Qing Zhang
- Xinjiang Key Laboratory of Agricultural Chemistry and Biomaterials, College of Chemistry and Chemical Engineering, Xinjiang Agricultural University, Urumchi, 830052, Xinjiang, People's Republic of China
| | - Xin Li
- Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing, 100083, People's Republic of China
| | - Shu-Ya Wang
- School of Bioengineering, Dalian University of Technology, Dalian, 116024, Liaoning, People's Republic of China
| | - De-Qiang Li
- Xinjiang Key Laboratory of Agricultural Chemistry and Biomaterials, College of Chemistry and Chemical Engineering, Xinjiang Agricultural University, Urumchi, 830052, Xinjiang, People's Republic of China
| |
Collapse
|
47
|
Ueno K, Matsushita T, Sugihara M, Yamada K, Sato H, Onoue S. Solid lipid nanoparticles of lutein with improved dissolution behavior and oral absorption. Pharm Dev Technol 2023; 28:877-883. [PMID: 37828716 DOI: 10.1080/10837450.2023.2270032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Accepted: 10/09/2023] [Indexed: 10/14/2023]
Abstract
The present study aimed to develop solid lipid nanoparticles of lutein (SLN/LT) with improved dissolution behavior and oral absorption. SLN/LT were prepared by a flash nanoprecipitation method using a multi-inlet vortex mixer, and their physicochemical, photochemical, and pharmacokinetic properties were evaluated. The mean particle size of SLN/LT re-dispersed in water was 237 nm, and small spherical particles with no significant aggregation were observed. LT significantly generated singlet oxygen upon exposure to pseudo-sunlight (250 W/m2, 1 h), suggesting its high photoreactivity. The remaining LT in LT solution, crystalline LT, and SLN/LT after irradiation with pseudo-sunlight (250 W/m2, 2 h) were 56.3, 86.7, and 101%, respectively. SLN/LT showed improved dissolution behavior of LT in simulated intestinal fluid, and the dissolved amounts of LT at 2 h were at least 50 times higher than that of crystalline LT. Orally administered SLN/LT (100 mg-LT/kg) exhibited enhanced oral absorption of LT, as evidenced by a relative bioavailability of 3.7 to crystalline LT in rats. SLN/LT may be a promising dosage form for orally available LT supplements, possibly leading to enhanced nutritional functions of LT.
Collapse
Affiliation(s)
- Kodai Ueno
- Laboratory of Biopharmacy, School of Pharmaceutical Sciences, University of Shizuoka, Suruga-ku, Shizuoka, Japan
| | - Tetsuya Matsushita
- Laboratory of Biopharmacy, School of Pharmaceutical Sciences, University of Shizuoka, Suruga-ku, Shizuoka, Japan
| | - Monami Sugihara
- Laboratory of Biopharmacy, School of Pharmaceutical Sciences, University of Shizuoka, Suruga-ku, Shizuoka, Japan
| | - Kohei Yamada
- Laboratory of Biopharmacy, School of Pharmaceutical Sciences, University of Shizuoka, Suruga-ku, Shizuoka, Japan
| | - Hideyuki Sato
- Laboratory of Biopharmacy, School of Pharmaceutical Sciences, University of Shizuoka, Suruga-ku, Shizuoka, Japan
| | - Satomi Onoue
- Laboratory of Biopharmacy, School of Pharmaceutical Sciences, University of Shizuoka, Suruga-ku, Shizuoka, Japan
| |
Collapse
|
48
|
Kozar D, Dong X, Li L. The recovery of river chemistry from acid rain in the Mississippi River basin amid intensifying anthropogenic activities and climate change. Sci Total Environ 2023; 897:165311. [PMID: 37419337 DOI: 10.1016/j.scitotenv.2023.165311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Revised: 07/01/2023] [Accepted: 07/02/2023] [Indexed: 07/09/2023]
Abstract
Acid rain has degraded the environmental health of many regions worldwide since the Industrial Revolution. Signatures of river chemistry recovery from acid rain since the Clean Air Act and similar legislation have been reported extensively in small streams but are often subdued or masked in large rivers by complex, co-occurring drivers. Here we assess the recovery of river chemistry from acid rain deposition in the Mississippi River Basin (MRB), the largest river basin in North America. We combine analysis of temporal trends of acid rain indicator solutes with Bayesian statistical models to assess the large-scale recovery from acid rain and characterize effects of anthropogenic activities. We found evidence of river chemistry recovery from acid rain; however, the effects of other anthropogenic activities, including fertilizer application and road salting, and changing climate, are likely intensifying. Trends of pH, alkalinity and SO4 export suggest acid rain recovery at large in the MRB, with stronger evidence of recovery in the historically afflicted eastern region of the basin. The concentrations of acid rain indicators generally correlate positively to NO3 and Cl, indicating that N-fertilizer application may have significantly increased weathering, and possibly acidification, and road salt application likely increased cation loss from catchments and contributed to SO4 export. Temperature correlates positively with solute concentrations, possibly through respiration-driven weathering or evaporation. The concentrations of acid rain indicators correlate negatively and most strongly to discharge, indicating discharge as a predominant driver and that lower discharge during droughts can elevate concentrations of riverine solutes in a changing climate. Using long-term data, this study represents a rare, comprehensive assessment of the recovery from acid rain in a large river basin, taking into consideration the entangled effects of multiple human activities and climate change. Our results highlight the ever-present need for adaptive environmental management in a constantly changing world.
Collapse
Affiliation(s)
- Daniel Kozar
- Department of Civil and Environmental Engineering, Pennsylvania State University, University Park, PA 16802, United States of America; Department of Environmental Science and Policy, University of California, Davis, CA 95616, United States of America.
| | - Xiaoli Dong
- Department of Environmental Science and Policy, University of California, Davis, CA 95616, United States of America
| | - Li Li
- Department of Civil and Environmental Engineering, Pennsylvania State University, University Park, PA 16802, United States of America
| |
Collapse
|
49
|
Suleiman Alsalhi M, Royall PG, Al-Obaidi H, Alsalhi A, Cilibrizzi A, Chan KLA. Non-salt based co-amorphous formulation produced by freeze-drying. Int J Pharm 2023; 645:123404. [PMID: 37714312 DOI: 10.1016/j.ijpharm.2023.123404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Revised: 09/08/2023] [Accepted: 09/09/2023] [Indexed: 09/17/2023]
Abstract
Amino acids-based co-amorphous system (CAM) has shown to be a promising approach to overcome the dissolution challenge of biopharmaceutics classification system class II drugs. To date, most CAM formulations are based on salt formation at a 1:1 M ratio and are prepared by mechanical activation. However, its use in medicinal products is still limited due to the lack of in-depth understanding of non-ionic based molecular interactions. There are also limited studies on the effect of drug-to-co-former ratio, the development of more scalable, less aggressive, manufacturing processes such as freeze drying and its dissolution benefits. This work aims to investigate the effect of the ratio of tryptophan (a model non-ionic amino acid) to indomethacin (a model drug) on a non-salt-based CAM prepared via freeze-drying with the tert-butyl alcohol-water cosolvent system. The CAM material was systemically characterized at various stages of the freeze-drying process using DSC, UV-Vis, FT-IR, NMR, TGA and XRPD. Dissolution performance and physical stability upon storage were also investigated. Freeze-drying using the cosolvent system has been successfully shown to produce CAMs. The molecular interactions involving H-bonding, H/π and π-π between compounds have been confirmed by FT-IR and NMR. The drug release rate for formulations with a 1.5:1 drug: amino acid molar ratio (or 1:0.42 wt ratio) or below is found to be significantly improved compared to the pure crystalline drug. Furthermore, formulation with a 2.3:1 drug:amino acid molar ratio (or 1:0.25 wt ratio) or below have shown to be physically stable for at least 9 months when stored at dry condition (5% relative humidity, 25 °C) compared to the pure amorphous indomethacin. We have demonstrated the potential of freeze-drying using tert-butyl alcohol-water cosolvent system to produce an optimal non-salt-based class II drug-amino acid CAM.
Collapse
Affiliation(s)
- Mohammed Suleiman Alsalhi
- Institute of Pharmaceutical Science, King's College London, SE1 9NH, UK; College of pharmacy, King Saud University, Riyadh, Saudi Arabia.
| | - Paul G Royall
- Institute of Pharmaceutical Science, King's College London, SE1 9NH, UK
| | - Hisham Al-Obaidi
- School of Chemistry, Food and Pharmacy (SCFP), University of Reading, Whiteknights, Reading RG6 6AP, UK
| | - Alyaa Alsalhi
- College of pharmacy, King Saud University, Riyadh, Saudi Arabia
| | | | | |
Collapse
|
50
|
Margate J, Virot M, Dumas T, Jégou C, Chave T, Cot-Auriol M, Alves A, Nikitenko SI. Micrometric drilling of (meta-)studtite square platelets formed by pseudomorphic conversion of UO 2 under high-frequency ultrasound. J Hazard Mater 2023; 459:132059. [PMID: 37478590 DOI: 10.1016/j.jhazmat.2023.132059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Revised: 07/01/2023] [Accepted: 07/12/2023] [Indexed: 07/23/2023]
Abstract
Pseudomorphic transformations are related to chemical conversions of materials while conserving their shape and structural features. Structuring ceramic shapes this way can be used to tailor the physico-chemical properties of materials that can benefit particular applications. In the context of spent nuclear fuel storage interacting with radiolysis products, the sonochemical behavior of powdered UO2 was investigated in dilute aqueous solutions saturated with Ar/(20 %)O2 (20 °C). Optimized parameter settings enabled the complete conversion of UO2 micrometric platelets into uranyl peroxide precipitates, referred to as (meta-)studtite [(UO2(O2)(H2O)2)xH2O] with x = 2 or 4. While the most acidic conditions yielded elongated crystal shapes in agreement with a dissolution/reprecipitation mechanism, softer conditions allowed the pseudomorphic transformation of the platelet shape oxide suggesting a complex formation mechanism. For specific conditions, this unprecedented morphology was accompanied with the formation of a hole in the platelet center. Investigations revealed that the formation of the drilled polymorphs is related to a perfect blend of H+, in-situ generation of H2O2 and high-frequency ultrasound, and is most probably related to the sono-capillary effect. These insights pave the way for new sonochemical approaches dedicated to the preparation of material polymorphs tailoring specific structural properties.
Collapse
Affiliation(s)
- Julien Margate
- ICSM, Univ Montpellier, CEA, CNRS, ENSCM, Marcoule, France
| | - Matthieu Virot
- ICSM, Univ Montpellier, CEA, CNRS, ENSCM, Marcoule, France.
| | - Thomas Dumas
- CEA, DES, ISEC, DMRC, Univ Montpellier, Marcoule, France
| | | | - Tony Chave
- ICSM, Univ Montpellier, CEA, CNRS, ENSCM, Marcoule, France
| | | | - Ange Alves
- ICSM, Univ Montpellier, CEA, CNRS, ENSCM, Marcoule, France
| | | |
Collapse
|