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Suchitra JP, Rhoda JC, Bharathi Devi V, Divya P, Albert HM. Synthesis, Structural, and Optical Properties of 2-(2-methyl 8-hydroxyquinoline) Magnesium Nanorods for Optical Display Systems. J Fluoresc 2024:10.1007/s10895-024-03724-7. [PMID: 38625575 DOI: 10.1007/s10895-024-03724-7] [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: 03/03/2024] [Accepted: 04/08/2024] [Indexed: 04/17/2024]
Abstract
Organic semiconductors find widespread applications in the realm of organic light-emitting diodes (OLEDs) as well as organic photovoltaic cells. In the domain of OLED devices, it is plausible for nano-based Mg metal complexes to play a role as electron and hole-transport layers. In the present investigation, we synthesized 2(2-methyl 8-hydroxyquinoline) magnesium [Mg(mq)2] nanorods through the employment of the precipitation method, using 2-methyl 8- hydroxyquinoline and magnesium acetate. We employed various techniques to characterize the Mg(mq)2 nanorods, including powder XRD, FTIR spectroscopy, SEM, EDX, UV-Vis, and PL spectroscopy studies. The structural aspects of Mg(mq)2 were ascertained through P-XRD analysis. The elemental composition of Mg(mq)2 and its surface texture were established via EDX and HR-SEM analyses. FTIR spectroscopy confirmed the existence of functional groups within the sample. UV-Vis spectroscopy was utilized to evaluate the optical absorbance, bandgap, and Urbach energy of Mg(mq)2. The luminescence properties of the Mg(mq)2 nanorods were determined from the photoluminescence study. The characterization results were compared with the Zn(mq)2 nano samples. The experimental results presented herein serve to demonstrate the practicality of employing Mg(mq)2 nanorods in OLED devices.
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Affiliation(s)
- J P Suchitra
- Department of Physics, Dr. M.G.R. Educational and Research Institute, Chennai, India
| | - J Christina Rhoda
- Department of Medical Laboratory Technology, Apollo Institute of Hospital Management and Allied Sciences, Ayanambakkam, Chennai, India
| | - V Bharathi Devi
- Department of Physics, Dr. M.G.R. Educational and Research Institute, Chennai, India
| | - P Divya
- Department of Physics, S.A. Engineering College, Thiruverkadu, Chennai, India
| | - Helen Merina Albert
- Department of Physics, Sathyabama Institute of Science and Technology, Chennai, India.
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Enea M, Nuekaew A, Franco R, Pereira E. Gold Nanoprobes for Detection of a Crucial EGFR Deletion for Early Diagnosis of Non-Small-Cell Lung Cancer. Biosensors (Basel) 2024; 14:162. [PMID: 38667155 PMCID: PMC11048279 DOI: 10.3390/bios14040162] [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: 03/05/2024] [Revised: 03/25/2024] [Accepted: 03/27/2024] [Indexed: 04/28/2024]
Abstract
Gold nanoparticles (AuNPs) exhibit improved optical and spectral properties compared to bulk materials, making them suitable for the detection of DNA, RNA, antigens, and antibodies. Here, we describe a simple, selective, and rapid non-cross linking detection assay, using approx. 35 nm spherical Au nanoprobes, for a common mutation occurring in exon 19 of the epidermal growth factor receptor (EGFR), associated with non-small-cell lung cancer cells. AuNPs were synthesized based on the seed-mediated growth method and functionalized with a specific 16 bp thiolated oligonucleotide using a pH-assisted method. Both AuNPs and Au nanoprobes proved to be highly stable and monodisperse through ultraviolet-visible spectrophotometry, dynamic light scattering (DLS), and electrophoretic light scattering (ELS). Our results indicate a detection limit of 1.5 µg mL-1 using a 0.15 nmol dm-3 Au nanoprobe concentration. In conclusion, this work presents an effective possibility for a straightforward, fast, and inexpensive alternative for the detection of DNA sequences related to lung cancer, leading to a potential platform for early diagnosis of lung cancer patients.
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Affiliation(s)
- Maria Enea
- LAQV/REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Rua Campo Alegre, 687, 4169-007 Porto, Portugal; (A.N.); (E.P.)
| | - Anupong Nuekaew
- LAQV/REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Rua Campo Alegre, 687, 4169-007 Porto, Portugal; (A.N.); (E.P.)
| | - Ricardo Franco
- Associate Laboratory i4HB, Institute for Health and Bioeconomy, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, 2819-516 Caparica, Portugal
- UCIBIO, Applied Molecular Biosciences Unit, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, 2819-516 Caparica, Portugal
| | - Eulália Pereira
- LAQV/REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Rua Campo Alegre, 687, 4169-007 Porto, Portugal; (A.N.); (E.P.)
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Collins S, Linnolahti M. Sheet Models for Methylaluminoxane (MAO) Activators? A Theoretical Case Study involving rac-Me 2Si(η 5-C 9H 6) 2Zr (SBIZr) Complexes. Chemphyschem 2024:e202300856. [PMID: 38469662 DOI: 10.1002/cphc.202300856] [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] [Received: 11/14/2023] [Revised: 03/09/2024] [Accepted: 03/10/2024] [Indexed: 03/13/2024]
Abstract
Activation of SBIZrMe2 or SBIZrMeCl and a sheet model for an active component of hydrolytic MAO, (MeAlO)16(Me3Al)6, (16,6) has been studied by DFT. Contact ion-pair formation occurs through the intermediacy of SBIZrMe(Cl) or SBIZrMe2 reacting with sheet 16,6 to furnish SBIZrMe-μ-X(MeAlO)16(Me3Al)6 (2, X=Me, Cl). Contact ion-pairs 2 would be in equilibrium with heterodinuclear catalyst precursors [SBIZrMe2AlMe2][(MeAlO)16(Me3Al)6X] (3 (X=Me, Cl) through reversible binding of Me3Al at higher Al : Zr ratios. Calculations show that formation of ion-pairs 3 from contact ion-pairs 2 is more favourable for the SBIZr compared with the parent Cp2Zr complexes. TD-DFT calculations were conducted on relevant SBIZr complexes to relate the results to earlier spectroscopic studies of catalyst activation using UV-Vis spectroscopy. Finally, propene insertion into ion-pairs 2, SBIZrMe-μ-MeB(C6F5)3 (6) and [SBIZrMe][B(C6F5)4] (7) was studied at M06-2X/TZVP level of theory. These studies suggest that contact ion-pairs 2 are significantly less reactive towards insertion than 6 or 7, in disagreement with experiment.
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Affiliation(s)
- Scott Collins
- Department of Chemistry, University of Eastern Finland, Joensuu Campus, Yliopistokatu 7, FI-80100, Joensuu, Finland
| | - Mikko Linnolahti
- Department of Chemistry, University of Eastern Finland, Joensuu Campus, Yliopistokatu 7, FI-80100, Joensuu, Finland
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Yang S, Yang J, Zhang X, Tang J, Li J, Zhang A. Degradation of refractory organic matter in MBR effluent from treating landfill leachate by UV/PMS and UV/H 2O 2: a comparative study. Environ Technol 2024; 45:1313-1325. [PMID: 36322432 DOI: 10.1080/09593330.2022.2143285] [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: 05/26/2022] [Accepted: 10/06/2022] [Indexed: 06/16/2023]
Abstract
This study applied ultraviolet/peroxymonosulfate (UV/PMS) and UV/hydrogen peroxide (UV/H2O2) processes to the advanced treatment of membrane bioreactor (MBR) effluent. The degradation efficiency of refractory organic matter and the reaction mechanisms of the two processes were systematically investigated. The results showed that the degradation efficiency of the UV/PMS processes was significantly lower than that of the UV/H2O2 process when the PMS concentration was significantly lower than the H2O2 concentration, e.g. the UV254 removals under optimal conditions were 72.92% and 82.21%, respectively. Additionally, the UV/PMS process could operate over a broader pH range. The degradation efficiency of the UV/PMS process was slightly increased by HCO3- and Cl- due to the activation of PMS, while in the UV/H2O2 process, HCO3- and Cl- depressed the degradation efficiency by competing with organic matter to react with reactive oxygen species (ROS). After the two processes, the aromaticity, humification, condensation degree, and molecular weight of refractory organic matter in the MBR effluent were considerably decreased. Fulvic- (HA) and humic-like substances (FA) were greatly degraded by the two processes. The UV/PMS had a superior degradation efficiency for macromolecular HA in the early stage of the reaction, and the UV/H2O2 could degrade HA to protein-like substances in the latter stage of the reaction. These differences between the two processes could be attributed to the dominance of different ROS, with SO4•- and HO• dominating in the UV/PMS, and HO• dominating in the UV/H2O2. The results of this study provide theoretical support for the application of MBR effluent treatment.Highlights Comparison on the MBR effluent treatment of UV/PMS and UV/H2O2 is studied.UV/PMS process can better destroy humic-like substances in the early reaction stage.Humic-like substances are transformed into protein-like compounds in UV/H2O2 process.UV/PMS and UV/PMS performs differently due to their different dominant ROS.
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Affiliation(s)
- Siping Yang
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, People's Republic of China
| | - Jing Yang
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, People's Republic of China
| | - Xiaoqin Zhang
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, People's Republic of China
| | - Jia Tang
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, People's Republic of China
| | - Jinlan Li
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, People's Republic of China
| | - Aiping Zhang
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, People's Republic of China
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Șuică-Bunghez IR, Senin RM, Sorescu AA, Ganciarov M, Răut I, Firincă C, Constantin M, Gifu IC, Stoica R, Fierăscu I, Fierăscu RC. Application of Lavandula angustifolia Mill. Extracts for the Phytosynthesis of Silver Nanoparticles: Characterization and Biomedical Potential. Plants (Basel) 2024; 13:333. [PMID: 38337867 PMCID: PMC10857192 DOI: 10.3390/plants13030333] [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: 12/01/2023] [Revised: 01/17/2024] [Accepted: 01/21/2024] [Indexed: 02/12/2024]
Abstract
Nanotechnology can offer a series of new "green" and eco-friendly methods for developing different types of nanoparticles, among which the development of nanomaterials using plant extracts (phytosynthesis) represents one of the most promising areas of research. This present study details the use of lavender flowers (Lavandula angustifolia Mill., well-known for their use in homeopathic applications) for the biosynthesis of silver nanoparticles with enhanced antioxidant and antibacterial properties. Several qualitative and quantitative assays were carried out in order to offer an image of the extracts' composition (the recorded total phenolics content varied between 21.0 to 40.9 mg GAE (gallic acid equivalents)/g dry weight (d.w.), while the total flavonoids content ranged between 3.57 and 16.8 mg CE (catechin equivalents)/g d.w.), alongside modern analytical methods (such as gas chromatography-mass spectrometry-GC-MS, quantifying 12 phytoconstituents present in the extracts). The formation of silver nanoparticles (AgNPs) using lavender extract was studied by UV-Vis spectroscopy, Fourier-transform infrared spectrometry (FTIR), scanning electron microscopy (SEM), X-ray diffraction (XRD), and dynamic light scattering (DLS)/zeta potential, with the selected nanoparticles having crystallite sizes of approx. 14.55 nm (AgNP-L2) and 4.61 nm, respectively (for AgNP-L4), and hydrodynamic diameters of 392.4 nm (for AgNP-L2) and 391.6 nm (for AgNP-L4), determined by DLS. A zeta potential of around -6.4 mV was displayed for both samples while presenting as large aggregates, in which nanoparticle clusters with dimensions of around 130-200 nm can be observed. The biomedical applications of the extracts and the corresponding phytosynthesized nanoparticles were evaluated using antioxidant and antimicrobial assays. The obtained results confirmed the phytosynthesis of the silver nanoparticles using Lavandula angustifolia Mill. extracts, as well as their antioxidant and antimicrobial potential.
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Affiliation(s)
- Ioana Raluca Șuică-Bunghez
- The National Institute for Research & Development in Chemistry and Petrochemistry—ICECHIM Bucharest, 202 Splaiul Independentei, 060021 Bucharest, Romania; (I.R.Ș.-B.); (A.A.S.); (M.G.); (I.R.); (C.F.); (M.C.); (I.C.G.); (R.S.); (I.F.)
| | - Raluca Mădălina Senin
- The National Institute for Research & Development in Chemistry and Petrochemistry—ICECHIM Bucharest, 202 Splaiul Independentei, 060021 Bucharest, Romania; (I.R.Ș.-B.); (A.A.S.); (M.G.); (I.R.); (C.F.); (M.C.); (I.C.G.); (R.S.); (I.F.)
| | - Ana Alexandra Sorescu
- The National Institute for Research & Development in Chemistry and Petrochemistry—ICECHIM Bucharest, 202 Splaiul Independentei, 060021 Bucharest, Romania; (I.R.Ș.-B.); (A.A.S.); (M.G.); (I.R.); (C.F.); (M.C.); (I.C.G.); (R.S.); (I.F.)
| | - Mihaela Ganciarov
- The National Institute for Research & Development in Chemistry and Petrochemistry—ICECHIM Bucharest, 202 Splaiul Independentei, 060021 Bucharest, Romania; (I.R.Ș.-B.); (A.A.S.); (M.G.); (I.R.); (C.F.); (M.C.); (I.C.G.); (R.S.); (I.F.)
| | - Iuliana Răut
- The National Institute for Research & Development in Chemistry and Petrochemistry—ICECHIM Bucharest, 202 Splaiul Independentei, 060021 Bucharest, Romania; (I.R.Ș.-B.); (A.A.S.); (M.G.); (I.R.); (C.F.); (M.C.); (I.C.G.); (R.S.); (I.F.)
| | - Cristina Firincă
- The National Institute for Research & Development in Chemistry and Petrochemistry—ICECHIM Bucharest, 202 Splaiul Independentei, 060021 Bucharest, Romania; (I.R.Ș.-B.); (A.A.S.); (M.G.); (I.R.); (C.F.); (M.C.); (I.C.G.); (R.S.); (I.F.)
- Faculty of Biology, University of Bucharest, 91 Splaiul Independenței, 050104 Bucharest, Romania
| | - Mariana Constantin
- The National Institute for Research & Development in Chemistry and Petrochemistry—ICECHIM Bucharest, 202 Splaiul Independentei, 060021 Bucharest, Romania; (I.R.Ș.-B.); (A.A.S.); (M.G.); (I.R.); (C.F.); (M.C.); (I.C.G.); (R.S.); (I.F.)
- Faculty of Pharmacy, “Titu Maiorescu” University, 187 Calea Vacaresti, 040051 Bucharest, Romania
| | - Ioana Cătălina Gifu
- The National Institute for Research & Development in Chemistry and Petrochemistry—ICECHIM Bucharest, 202 Splaiul Independentei, 060021 Bucharest, Romania; (I.R.Ș.-B.); (A.A.S.); (M.G.); (I.R.); (C.F.); (M.C.); (I.C.G.); (R.S.); (I.F.)
| | - Rusăndica Stoica
- The National Institute for Research & Development in Chemistry and Petrochemistry—ICECHIM Bucharest, 202 Splaiul Independentei, 060021 Bucharest, Romania; (I.R.Ș.-B.); (A.A.S.); (M.G.); (I.R.); (C.F.); (M.C.); (I.C.G.); (R.S.); (I.F.)
| | - Irina Fierăscu
- The National Institute for Research & Development in Chemistry and Petrochemistry—ICECHIM Bucharest, 202 Splaiul Independentei, 060021 Bucharest, Romania; (I.R.Ș.-B.); (A.A.S.); (M.G.); (I.R.); (C.F.); (M.C.); (I.C.G.); (R.S.); (I.F.)
- Faculty of Horticulture, University of Agronomic Sciences and Veterinary Medicine of Bucharest, 59 Marasti Blvd., 011464 Bucharest, Romania
| | - Radu Claudiu Fierăscu
- The National Institute for Research & Development in Chemistry and Petrochemistry—ICECHIM Bucharest, 202 Splaiul Independentei, 060021 Bucharest, Romania; (I.R.Ș.-B.); (A.A.S.); (M.G.); (I.R.); (C.F.); (M.C.); (I.C.G.); (R.S.); (I.F.)
- Faculty of Chemical Engineering and Biotechnology, National University of Science and Technology Politehnica Bucharest, 1-7 Gheorghe Polizu St., 011061 Bucharest, Romania
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Gimenez-Gomez A, Rollins B, Steele A, Hölzel H, Baggi N, Moth-Poulsen K, Funes-Ardoiz I, Sampedro D. Unveiling the Potential of Heterogeneous Catalysts for Molecular Solar Thermal Systems. Chemistry 2024; 30:e202303230. [PMID: 37947164 DOI: 10.1002/chem.202303230] [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] [Received: 10/02/2023] [Revised: 11/08/2023] [Accepted: 11/09/2023] [Indexed: 11/12/2023]
Abstract
Solar energy utilization has gained considerable attention due to its abundance and renewability. However, its intermittent nature presents a challenge in harnessing its full potential. The development of energy storing compounds capable of capturing and releasing solar energy on demand has emerged as a potential solution. These compounds undergo a photochemical transformation that results in a high-energy metastable photoisomer, which stores solar energy in the form of chemical bonds and can release it as heat when required. Such systems are referred to as MOlecular Solar Thermal (MOST)-systems. Although the photoisomerization of MOST systems has been vastly studied, its back-conversion, particularly using heterogeneous catalysts, is still underexplored and the development of effective catalysts for releasing stored energy is crucial. Herein we compare the performance of 27 heterogeneous catalysts releasing the stored energy in an efficient Norbornadiene/Quadricyclane (NBD/QC) MOST system. We report the first benchmarking of heterogeneous catalysts for a MOST system using a robust comparison method of the catalysts' activity and monitoring the conversion using UV-Visible (UV-Vis) spectroscopy. Our findings provide insights into the development of effective catalysts for MOST systems. We anticipate that our assay will reveal the necessity of further investigation on heterogeneous catalysis.
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Affiliation(s)
- Alberto Gimenez-Gomez
- Department of Chemistry, Instituto de Investigación Química de la Universidad de La Rioja (IQUR), Universidad de La Rioja, Madre de Dios 53, 26006, Logroño, Spain
| | - Benjamin Rollins
- Johnson Matthey Technology Centre, Blounts Court Road, Sonning Common, RG4 9NH, Reading, UK
| | - Andrew Steele
- Johnson Matthey Technology Centre, Blounts Court Road, Sonning Common, RG4 9NH, Reading, UK
| | - Helen Hölzel
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Kemivägen 4, 412 96, Gothenburg, Sweden
- Department of Chemical Engineering, Universitat Politècnica de Catalunya, EEBE, Eduard Maristany 10-14, 08019, Barcelona, Spain
| | - Nicolò Baggi
- The Institute of Materials Science of Barcelona, ICMAB-CSIC, 08193, Barcelona, Spain
| | - Kasper Moth-Poulsen
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Kemivägen 4, 412 96, Gothenburg, Sweden
- Department of Chemical Engineering, Universitat Politècnica de Catalunya, EEBE, Eduard Maristany 10-14, 08019, Barcelona, Spain
- The Institute of Materials Science of Barcelona, ICMAB-CSIC, 08193, Barcelona, Spain
- Catalan Institution for Research & Advanced Studies, ICREA, Pg. Lluís Companys 23, 08010, Barcelona, Spain
| | - Ignacio Funes-Ardoiz
- Department of Chemistry, Instituto de Investigación Química de la Universidad de La Rioja (IQUR), Universidad de La Rioja, Madre de Dios 53, 26006, Logroño, Spain
| | - Diego Sampedro
- Department of Chemistry, Instituto de Investigación Química de la Universidad de La Rioja (IQUR), Universidad de La Rioja, Madre de Dios 53, 26006, Logroño, Spain
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Li Q, Shao X, Cui H, Wei Y, Shang Y. Dynamic Multivariate Outlier Detection Algorithm Using Ultraviolet Visible Spectroscopy for Monitoring Surface Water Contamination With Hydrological Fluctuation in Real-Time. Appl Spectrosc 2023; 77:1371-1381. [PMID: 38010873 DOI: 10.1177/00037028231206191] [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] [Indexed: 11/29/2023]
Abstract
The contamination of surface water is of great harm. Ultraviolet-visible (UV-Vis) spectroscopy is an effective method to detect water contamination. However, surface water quality is influenced by hydrological fluctuation caused by rain, change of flow, etc., leading to changes of spectral characteristics over time. In the process of contamination detection, such changes cause confusion between hydrological fluctuation spectra and contaminated water spectra, thus increasing the false alarm rate. Besides, missing alarms of contaminated water is a common problem when the signal-to-noise ratio is low. In this paper, a dynamic multivariable outlier sampling rate detection (DM-SRD) algorithm is proposed. A dynamic updating strategy is introduced to increase adaptability to hydrological fluctuation. Additionally, multiple outlier variables are adopted as outlying degree indicators, which increases the accuracy of contamination detection. Two experiments were carried out using spectra collected from real surface water sites and hydrological fluctuation was constructed. To verify the effectiveness of the DM-SRD method, a comparison with the static SRD method and spectral match method was conducted. The results show that the accuracy of the DM-SRD method is 97.8%. Compared with the other two detection methods, DM-SRD significantly reduces false alarm rate and avoids missing alarms. Additionally, the results demonstrate that whether the database contained prior information on hydrological fluctuation or not, DM-SRD maintained high detection accuracy, which indicates great adaptability and robustness.
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Affiliation(s)
- Qingbo Li
- Precision Opto-Mechatronics Technology Key Laboratory of Education Ministry, School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing, China
| | - Xupeng Shao
- Precision Opto-Mechatronics Technology Key Laboratory of Education Ministry, School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing, China
| | - Houxin Cui
- Research and Development Department, Hebei Sailhero Environmental Protection Hi-Tech Co., Ltd, Shijiazhuang, China
| | - Yuan Wei
- Precision Opto-Mechatronics Technology Key Laboratory of Education Ministry, School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing, China
| | - Yongchang Shang
- Research and Development Department, Hebei Sailhero Environmental Protection Hi-Tech Co., Ltd, Shijiazhuang, China
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Tsiasioti A, Tzanavaras PD. Developments in on-line, post separation sample manipulation in the last 22 years: Pharmaceutical and biomedical applications. J Pharm Biomed Anal 2023; 235:115654. [PMID: 37611457 DOI: 10.1016/j.jpba.2023.115654] [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: 07/04/2023] [Revised: 08/15/2023] [Accepted: 08/15/2023] [Indexed: 08/25/2023]
Abstract
On-line post separation sample manipulation is a powerful approach increasing the sensitivity and selectivity in chemical analysis. Post separation sample manipulation includes the treatment of the analytes after their separation through a suitable separation technique, mainly liquid chromatography and capillary electrophoresis. Typically, post separation approaches include either the addition of a reagent/solvent to derivatize the analyte/enhance the sensitivity, pH change, or the conversion of the analyte through a photochemical/electrochemical system (reagent-free systems). This review focuses on the developed methods using post-column manipulation of sample with pharmaceuticals and biomedical applications, covering the period from 2000 to midle-2023. Chemistries combined with fluorescence, UV-vis and mass spectrometric detection are discussed employing both liquid chromatography and electrophoretic techniques for separation. Noteworthy instrumental modifications are also discussed.
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Affiliation(s)
- Apostolia Tsiasioti
- Laboratory of Analytical Chemistry, School of Chemistry, Faculty of Sciences, Aristotle University of Thessaloniki, GR-54124, Greece
| | - Paraskevas D Tzanavaras
- Laboratory of Analytical Chemistry, School of Chemistry, Faculty of Sciences, Aristotle University of Thessaloniki, GR-54124, Greece.
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9
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Borcan F, Vlase T, Vlase G, Popescu R, Soica CM. The Influence of an Isocyanate Structure on a Polyurethane Delivery System for 2'-Deoxycytidine-5'-monophosphate. J Funct Biomater 2023; 14:526. [PMID: 37888191 PMCID: PMC10607123 DOI: 10.3390/jfb14100526] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [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] [Received: 09/06/2023] [Revised: 10/16/2023] [Accepted: 10/17/2023] [Indexed: 10/28/2023] Open
Abstract
The delivery of nucleosides represents an interesting research trend in recent years due to their application in various viral infections. The main aims of this study were to develop and to characterize polyurethane particles that are intended to be used for the transport of nucleosides. Three samples have been prepared using aliphatic diisocyanates, a mixture of polyethylene glycol, polycaprolactone, and diols, respectively. The samples were characterized through refractivity measurements, drug loading efficacy, release and penetration rate investigations, FTIR and Raman spectroscopy, thermal analyses, Zetasizer, SEM, HDFa cells viability, and irritation tests on mice skin. The results indicate the obtaining of particles with sizes between 132 and 190 nm, positive Zeta potential values (28.3-31.5 mV), and a refractivity index around 1.60. A good thermal stability was found, and SEM images show a medium tendency to agglomerate. The samples' color, pH, and electrical conductivity have changed only to a small extent over time, and the evaluations indicate an almost 70% encapsulation efficacy, a prolonged release, and that around 70% of particles have penetrated an artificial membrane in the first 24 h. The synthesized products should be tested in further clinical trials, and the current tests on cell cultures and mice skin revealed no side effects.
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Affiliation(s)
- Florin Borcan
- Department I, Advanced Instrumental Screening Center, Faculty of Pharmacy, “Victor Babes” University of Medicine and Pharmacy, 2 E. Murgu Sq., 300041 Timisoara, Romania
| | - Titus Vlase
- Research Center “Thermal Analysis in Environmental Problems”, Faculty of Chemistry, Biology, Geography, West University of Timisoara, 16 Pestalozzi Str., 300115 Timisoara, Romania; (T.V.); (G.V.)
| | - Gabriela Vlase
- Research Center “Thermal Analysis in Environmental Problems”, Faculty of Chemistry, Biology, Geography, West University of Timisoara, 16 Pestalozzi Str., 300115 Timisoara, Romania; (T.V.); (G.V.)
| | - Roxana Popescu
- Department II, Faculty of Medicine, “Victor Babes” University of Medicine and Pharmacy, 14A T. Vladimirescu Str., 300041 Timisoara, Romania;
| | - Codruta M. Soica
- Department II, Faculty of Pharmacy, “Victor Babes” University of Medicine and Pharmacy, 2 E. Murgu Sq., 300041 Timisoara, Romania;
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Lalotra N, Kaith P, Pathania K. Microscopic and luminescence characteristics of Dy 3+ doped KSrVO 4 nanophosphors as energy efficient photoluminescent material with potential application in white light-emitting diodes. Environ Sci Pollut Res Int 2023; 30:108928-108945. [PMID: 37759052 DOI: 10.1007/s11356-023-29948-x] [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: 06/20/2023] [Accepted: 09/14/2023] [Indexed: 09/29/2023]
Abstract
Nanotechnology has drawn an enormous amount of attention by providing various measures to reduce energy consumption. Phosphor-converted white-light emitting diodes (pc-w-LEDs), which are used in lighting applications, are gaining popularity. These materials are affordable, effective, and safe for the environment. Therefore, the main objective of the current study is to synthesize an economical phosphor which consumes low energy and is less harmful to the environment. In this study, Dysprosium (Dy3+) doped Potassium Strontium Vanadate (KSrVO4) nanopowders synthesized via the combustion process and using X-ray diffraction, FESEM, EDAX, HRTEM, UV-Vis spectroscopy, and photoluminescence spectroscopy techniques, we have examined its various structural, spectroscopic, optical, and morphological characteristics. The crystallite size was estimated using the XRD patterns and was found to be 25.724 nm. The functional groups contained in synthesized phosphor were identified using FTIR spectrum measurements. Using HRTEM, a particle size of 36.33 nm was predicted, which is consistent with the XRD results. The Kubelka-Munk approximation is used to determine the band gap energy of the produced nanophosphors. Three major peaks that correspond to the transitions of 4F9/2 → 6HJ (J = 15/2, 13/2, and 11/2) were discovered at 476 nm, 578 nm, and 669 nm, respectively, under the excitation of 390 nm near UV light. We investigated the impact of Dy3+ doping, the enhancement of emission intensity and the mechanism of concentration quenching on the photoluminescence spectra of the KSrVO4 host. KSrVO4:Dy3+ also demonstrated a suitable CCT (3745 K), enhanced color purity and high quantum yield in this work, indicating that this phosphor has potential applications in w-LED devices.
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Affiliation(s)
- Neha Lalotra
- School of Physics, Shri Mata Vaishno Devi University, Katra, -182320 (J&K), India
| | - Priya Kaith
- Department of Physics, Indian Institute of Technology Jammu, Jammu, -181121 (J&K), India
| | - Kamni Pathania
- School of Physics, Shri Mata Vaishno Devi University, Katra, -182320 (J&K), India.
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Tan YY, Wong LS, Nyam KL, Wittayanarakul K, Zawawi NA, Rajendran K, Djearamane S, Dhanapal ACTA. Development and Evaluation of Topical Zinc Oxide Nanogels Formulation Using Dendrobium anosmum and Its Effect on Acne Vulgaris. Molecules 2023; 28:6749. [PMID: 37836592 PMCID: PMC10574386 DOI: 10.3390/molecules28196749] [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: 07/06/2023] [Revised: 08/16/2023] [Accepted: 08/31/2023] [Indexed: 10/15/2023] Open
Abstract
Zinc oxide nanoparticles have high levels of biocompatibility, a low impact on environmental contamination, and suitable to be used as an ingredient for environmentally friendly skincare products. In this study, biogenically synthesized zinc oxide nanoparticles using Dendrobium anosum are used as a reducing and capping agent for topical anti-acne nanogels, and the antimicrobial effect of the nanogel is assessed on Cutibacterium acne and Staphylococcus aureus. Dendrobium anosmum leaf extract was examined for the presence of secondary metabolites and its total amount of phenolic and flavonoid content was determined. Both the biogenically and chemogenic-synthesized zinc oxide nanoparticles were compared using UV-Visible spectrophotometer, FE-SEM, XRD, and FTIR. To produce the topical nanogel, the biogenic and chemogenic zinc oxide nanoparticles were mixed with a carbomer and hydroxypropyl-methyl cellulose (HPMC) polymer. The mixtures were then tested for physical and chemical characteristics. To assess their anti-acne effectiveness, the mixtures were tested against C. acne and S. aureus. The biogenic zinc oxide nanoparticles have particle sizes of 20 nm and a high-phase purity. In comparison to chemogenic nanoparticles, the hydrogels with biogenically synthesized nanoparticles was more effective against Gram-positive bacteria. Through this study, the hybrid nanogels was proven to be effective against the microbes that cause acne and to be potentially used as a green product against skin infections.
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Affiliation(s)
- Yu Yang Tan
- Department of Chemical Science, Faculty of Science, Universiti Tunku Abdul Rahman, Kampar 31900, Malaysia;
| | - Ling Shing Wong
- Life Science Division, Faculty of Health and Life Sciences, INTI International University, Nilai 71899, Malaysia
| | - Kar Lin Nyam
- Department of Food Science and Nutrition, Faculty of Applied Sciences, UCSI University, Kuala Lumpur 56000, Malaysia;
| | - Kitiyaporn Wittayanarakul
- Program in Science Technology and Business Enterprise, Faculty of Interdisciplinary Studies, Khon Kaen University, Nong Khai Campus, Nong Khai 43000, Thailand;
| | - Nurliyana Ahmad Zawawi
- Department of Bioscience, Faculty of Science, Universiti Teknologi Malaysia, Johor Bahru 81310, Malaysia;
| | - Kavitha Rajendran
- Department of Pharmaceutics, SRM Institute of Science and Technology, SRM College of Pharmacy, Kattankulathur 603203, Tamil Nadu, India;
| | - Sinovassane Djearamane
- Department of Biomedical Science, Faculty of Science, Universiti Tunku Abdul Rahman, Kampar 31900, Malaysia;
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de Castro Silva Junior H, Antunes U, Dos Santos AJRWA, Moreira EC. Tweaking the conjugation effects on a pair of new triazene compounds by targeted deprotonation: a spectroscopic and theoretical overview. J Mol Model 2023; 29:298. [PMID: 37642802 DOI: 10.1007/s00894-023-05685-3] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2023] [Accepted: 08/07/2023] [Indexed: 08/31/2023]
Abstract
CONTEXT Triazene compounds (-NNN(H)-) exhibit versatility in biological, physical, and chemical applications. In their anionic form (-NNN-)(-), they can act as coordinating sites for metals, forming metallic complexes. In this study, two new isomeric triazene compounds with meta- and para-substituents in their neutral and anionic forms were investigated. A combination of detailed experimental spectroscopic characterization and computational chemistry analyses were employed. The new compounds, 1-(2-benzamide)-3-(3-nitrophenyl) triazene (m-TZN) and 1-(2-benzamide)-3-(4-nitrophenyl) triazene (p-TZN), were compared to 1,3-diphenyltriazene (dph-TZN) to understand the effects of functionalization and targeted triazene deprotonation. The anionic forms are stable, and our investigation suggests that these new compounds are suitable tridentate ligands that can act as chelating agents for metallic cations in stable complexes, similar to those found in vitamin B12. METHODS The absorption, vibrational, and electronic properties of the newly synthesized triazene compounds were extensively characterized using FT-IR/FT-Raman and UV-Vis spectroscopy. Their distinct molecular properties, intramolecular hydrogen bond effects, stability, and electronic transitions were investigated using the ORCA software. These analyses involved DFT and TD-DFT calculations at the ωB97X-D3/Def2-TZVP level of theory with THF CPCM implicit solvation to determine the molecular topology and electronic structure. The advanced STEOM-DLPNO-CCSD method for excited states was employed, enabling an in-depth analysis of ground and excited-state chemistry, accounting for precise electronic correlation and solvation effects. Explicit THF solvation was tested on the full TD-DFT ωB97X-D3/Def2-TZVP level and using ONIOM on the STEOM calculation. Reactivity was studied using Fukui functions, and action as chelating agents was investigated using GFN-xTB2 and DFT.
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Affiliation(s)
| | - Uhil Antunes
- Programa de Pós-graduação em Ciência e Engenharia de Materiais, Universidade Federal do Pampa, Campus Bagé, Bagé, RS, Brazil
| | | | - Eduardo Ceretta Moreira
- Programa de Pós-graduação em Ciência e Engenharia de Materiais, Universidade Federal do Pampa, Campus Bagé, Bagé, RS, Brazil
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Moura NMM, Cavaleiro JAS, Neves MGPMS, Ramos CIV. opp-Dibenzoporphyrin Pyridinium Derivatives as Potential G-Quadruplex DNA Ligands. Molecules 2023; 28:6318. [PMID: 37687146 PMCID: PMC10489911 DOI: 10.3390/molecules28176318] [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: 07/12/2023] [Revised: 08/12/2023] [Accepted: 08/13/2023] [Indexed: 09/10/2023] Open
Abstract
Since the occurrence of tumours is closely associated with the telomerase function and oncogene expression, the structure of such enzymes and genes are being recognized as targets for new anticancer drugs. The efficacy of several ligands in telomerase inhibition and in the regulation of genes expression, by an effective stabilisation of G-quadruplexes (G4) DNA structures, is being considered as a promising strategy in cancer therapies. When evaluating the potential of a ligand for telomerase inhibition, the selectivity towards quadruplex versus duplex DNA is a fundamental attribute due to the large amount of double-stranded DNA in the cellular nucleus. This study reports the evaluated efficacy of three tetracationic opp-dibenzoporphyrins, a free base, and the corresponding zinc(II) and nickel(II) complexes, to stabilise G4 structures, namely the telomeric DNA sequence (AG3(T2AG3)3). In order to evaluate the selectivity of these ligands towards G4 structures, their interaction towards DNA calf thymus, as a double-strand DNA sequence, were also studied. The data obtained by using different spectroscopic techniques, such as ultraviolet-visible, fluorescence, and circular dichroism, suggested good affinity of the free-base porphyrin and of its zinc(II) complex for the considered DNA structures, both showing a pattern of selectivity for the telomeric G4 structure. A pattern of aggregation in aqueous solution was detected for both Zn(II) and Ni(II) metallo dibenzoporphyrins and the ability of DNA sequences to induce ligand disaggregation was observed.
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Affiliation(s)
- Nuno M. M. Moura
- LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal; (J.A.S.C.); (M.G.P.M.S.N.)
| | | | | | - Catarina I. V. Ramos
- LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal; (J.A.S.C.); (M.G.P.M.S.N.)
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Rada R, Vermesan H, Rada S, Leostean C, Manea DL, Culea E. Development of Iron-Silicate Composites by Waste Glass and Iron or Steel Powders. Molecules 2023; 28:6296. [PMID: 37687124 PMCID: PMC10488717 DOI: 10.3390/molecules28176296] [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: 08/07/2023] [Revised: 08/18/2023] [Accepted: 08/24/2023] [Indexed: 09/10/2023] Open
Abstract
There is growing interest in the opportunities regarding construction and demolition wastes, such as glass and metal powders, for developing a circular economy and their transformation into new materials. This management and recycling of construction and demolition waste offers environmental benefits and conservation of natural resources. In this paper, new magnetic composite materials were prepared by wet chemical synthesis methods using crushed glasses and iron and steel waste powders as raw materials. The prepared iron-silicate composites were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM) analysis, infrared (IR), ultraviolet-visible, and electron paramagnetic resonance (EPR) spectroscopy, and magnetic measurements. The XRD data confirm the formation of varied crystalline phases of the iron ions. The presence of the Fe3O4 crystalline phase was detected in the composites containing the iron waste powders. The inspection of the SEM micrographs revealed slightly better homogeneity for the composite material containing larger amounts of iron waste and heterogeneous morphology with cracks and random crystallinity for the composite doped with steel waste. By doping with different contents of iron or steel waste powder, structural modifications in the silicate network and the formation of new bands in the IR spectra were evidenced. The UV-Vis spectra were characterized by the absorption peaks for both the tetrahedral and octahedral geometries of the Fe3+ ions and the octahedral coordination of the Fe2+ ions with oxygen anions. The EPR data show resonance lines with g ~2, 4.3, and 6.4, corresponding to the Fe3+ ions. Using hysteresis curves, the superparamagnetic properties of the iron-silicate composites were evidenced.
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Affiliation(s)
- Roxana Rada
- Department of Physics and Chemistry, Technical University of Cluj-Napoca, 400641 Cluj-Napoca, Romania; (R.R.); (H.V.); (D.L.M.); (E.C.)
| | - Horatiu Vermesan
- Department of Physics and Chemistry, Technical University of Cluj-Napoca, 400641 Cluj-Napoca, Romania; (R.R.); (H.V.); (D.L.M.); (E.C.)
| | - Simona Rada
- Department of Physics and Chemistry, Technical University of Cluj-Napoca, 400641 Cluj-Napoca, Romania; (R.R.); (H.V.); (D.L.M.); (E.C.)
- National Institute of Research and Development for Isotopic and Molecular Technologies, 400293 Cluj-Napoca, Romania;
| | - Cristian Leostean
- National Institute of Research and Development for Isotopic and Molecular Technologies, 400293 Cluj-Napoca, Romania;
| | - Daniela Lucia Manea
- Department of Physics and Chemistry, Technical University of Cluj-Napoca, 400641 Cluj-Napoca, Romania; (R.R.); (H.V.); (D.L.M.); (E.C.)
| | - Eugen Culea
- Department of Physics and Chemistry, Technical University of Cluj-Napoca, 400641 Cluj-Napoca, Romania; (R.R.); (H.V.); (D.L.M.); (E.C.)
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Bouaziz C, Seraghni N, Sellam B, Sangare S, Belaidi S, Debbache N, Sehili T. Photochemistry of the Fe(III)-iminodiacetic acid complex under UVA and UV/Vis irradiation: synthesis and characterisation. Environ Technol 2023:1-16. [PMID: 37519279 DOI: 10.1080/09593330.2023.2240503] [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: 01/26/2023] [Accepted: 06/11/2023] [Indexed: 08/01/2023]
Abstract
The photochemistry of Fe(III)-Iminodiacetic acid complex (Fe(III)-IDA) was studied under UVA and UV/Vis irradiation. The synthesis was realised via molar ratio method modified by reaction of IDA as ligand with Fe(III) as metal. The interaction of Fe(III) with IDA was characterised using Fourier-transform infrared (FTIR) and spectroscopy UV-visible. The results confirmed the stability of the complex at pH > 5; with constant of stability (Log β = 10.02) and stoichiometry Fe(III): IDA = 1:1. In addition, the redox potential was calculated at 521 mV, which is significantly lower than E° for the Fe(III)/Fe(II) couple. The photolysis of this complex in the presence of UVA light and UV/Vis light at different pHs was carried out. This photolysis was followed by several assay Fe(II) and •OH. The results show that the Fe(III)-IDA complex present a photo-reactivities under either light source and the phenomenon is faster when the UV/Vis was used. The initial conversion rate (r0) decreased with increasing of initial pH. The formation of hydroxyl radicals via the Fenton reaction was improved at pH = 2.12 for both irradiation sources used. Reduction of total organic carbon was also studied using the total organic carbon (TOC). The feasibility of amino iron complexes to improve the Fenton process under irradiation was confirmed. Additionally, our research also evidenced the optimal conditions for the formation of hydroxyl radicals; which are the key factor in remove pharmaceuticals pollutants in aqueous media. Based on the results obtained, the Fe(III)-IDA complex could be efficiently photolysis under UV/Vis light.
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Affiliation(s)
- Chaima Bouaziz
- Laboratoire des Sciences et Technologies de l'Environnement (LSTE), Département de Chimie, Faculté des Sciences Exactes, Université Frères Mentouri Constantine1, Constantine, Algeria
| | - Nassira Seraghni
- Laboratoire des Sciences et Technologies de l'Environnement (LSTE), Département de Chimie, Faculté des Sciences Exactes, Université Frères Mentouri Constantine1, Constantine, Algeria
| | - Badreddine Sellam
- Laboratoire des Sciences et Technologies de l'Environnement (LSTE), Département de Chimie, Faculté des Sciences Exactes, Université Frères Mentouri Constantine1, Constantine, Algeria
| | - Sadio Sangare
- Laboratoire des Sciences et Technologies de l'Environnement (LSTE), Département de Chimie, Faculté des Sciences Exactes, Université Frères Mentouri Constantine1, Constantine, Algeria
| | - Sihem Belaidi
- Laboratoire des Sciences et Technologies de l'Environnement (LSTE), Département de Chimie, Faculté des Sciences Exactes, Université Frères Mentouri Constantine1, Constantine, Algeria
| | - Nadra Debbache
- Laboratoire des Sciences et Technologies de l'Environnement (LSTE), Département de Chimie, Faculté des Sciences Exactes, Université Frères Mentouri Constantine1, Constantine, Algeria
| | - Tahar Sehili
- Laboratoire des Sciences et Technologies de l'Environnement (LSTE), Département de Chimie, Faculté des Sciences Exactes, Université Frères Mentouri Constantine1, Constantine, Algeria
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Inbanathan FPN, Cimatu KLA, Ingram DC, Erasquin UJ, Dasari K, Sultan MS, Sajjad M, Makarov V, Weiner BR, Morell G, Sharifi Abdar P, Jadwisienczak WM. Paramagnetism in Microwave-Synthesized Metal-Free Nitrogen-Doped Graphene Quantum Dots. Materials (Basel) 2023; 16:ma16093410. [PMID: 37176291 PMCID: PMC10179833 DOI: 10.3390/ma16093410] [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: 02/24/2023] [Revised: 04/11/2023] [Accepted: 04/24/2023] [Indexed: 05/15/2023]
Abstract
Nitrogen-doped graphene quantum dots (NGQDs) have gained significant attention due to their various physical and chemical properties; however, there is a gap in the study of NGQDs' magnetic properties. This work adds to the efforts of bridging the gap by demonstrating the room temperature paramagnetism in GQDs doped with Nitrogen up to 3.26 at.%. The focus of this experimental work was to confirm the paramagnetic behavior of metal free NGQDs resulting from the pyridinic N configuration in the GQDs host. Metal-free nitrogen-doped NGQDs were synthesized using glucose and liquid ammonia as precursors by microwave-assisted synthesis. This was followed by dialysis filtration. The morphology, optical, and magnetic properties of the synthesized NGQDs were characterized carefully through atomic force microscopy (AFM), transmission electron microscopy (TEM)), UV-VIS spectroscopy, fluorescence, X-ray photon spectroscopy (XPS), and vibrating sample magnetometer (VSM). The high-resolution TEM analysis of NGQDs showed that the NGQDs have a hexagonal crystalline structure with a lattice fringe of ~0.24 nm of (1120) graphene plane. The N1s peak using XPS was assigned to pyridinic, pyrrolic, graphitic, and oxygenated NGQDs. The magnetic study showed the room-temperature paramagnetic behavior of NGQDs with pyridinic N configuration, which was found to have a magnetization of 20.8 emu/g.
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Affiliation(s)
- Flavia P N Inbanathan
- School of Electrical Engineering and Computer Science, Ohio University, Athens, OH 45701, USA
| | | | - David C Ingram
- Department of Physics and Astronomy, Ohio University, Athens, OH 45701, USA
| | | | - Kiran Dasari
- Department of Physics, University of Puerto Rico-Rio Piedras Campus, San Juan, PR 00925-2537, USA
| | - Muhammad Shehzad Sultan
- Department of Physics, University of Puerto Rico-Rio Piedras Campus, San Juan, PR 00925-2537, USA
- Molecular Sciences Research Center, University of Puerto Rico, San Juan, PR 00926-2614, USA
| | - Muhammad Sajjad
- Department of Physics, University of Puerto Rico-Rio Piedras Campus, San Juan, PR 00925-2537, USA
- Molecular Sciences Research Center, University of Puerto Rico, San Juan, PR 00926-2614, USA
| | - Vladimir Makarov
- Department of Physics, University of Puerto Rico-Rio Piedras Campus, San Juan, PR 00925-2537, USA
- Molecular Sciences Research Center, University of Puerto Rico, San Juan, PR 00926-2614, USA
| | - Brad R Weiner
- Department of Physics, University of Puerto Rico-Rio Piedras Campus, San Juan, PR 00925-2537, USA
- Department of Chemistry, University of Puerto Rico-Rio Piedras Campus, San Juan, PR 00925-2537, USA
| | - Gerardo Morell
- Department of Physics, University of Puerto Rico-Rio Piedras Campus, San Juan, PR 00925-2537, USA
- Molecular Sciences Research Center, University of Puerto Rico, San Juan, PR 00926-2614, USA
| | - Payman Sharifi Abdar
- Department of Chemical and Biomedical Engineering, Institute for Corrosion and Multiphase Flow Technology, Ohio University, Athens, OH 45701, USA
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D'Angelo A, Vertuccio L, Leonelli C, Alzeer MIM, Catauro M. Entrapment of Acridine Orange in Metakaolin-Based Geopolymer: A Feasibility Study. Polymers (Basel) 2023; 15. [PMID: 36771976 DOI: 10.3390/polym15030675] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2023] [Revised: 01/19/2023] [Accepted: 01/25/2023] [Indexed: 01/31/2023] Open
Abstract
Few studies have explored the immobilization of organic macromolecules within the geopolymer matrix, and some have found their chemical instability in the highly alkaline geopolymerization media. The present work reports on the feasibility of encapsulating the potentially toxic acridine orange (AO) dye in a metakaolin based geopolymer while maintaining its structural integrity. The proper structural, chemical, and mechanical stabilities of the final products were ascertained using Fourier-transform infrared (FT-IR) spectroscopy, scanning electron microscopy (SEM), X-ray diffraction (XRD), thermogravimetric (TGA/DTG), and mechanical analyses, whereas the dye integrity and its stability inside the geopolymer were investigated by the UV-Vis analysis. In addition, the antimicrobial activity was investigated. The FT-IR and XRD analyses confirmed the geopolymerization occurrence, whereas the TGA/DTG and mechanical (compressive and flexural) strength revealed that the addition of 0.31% (AO mg/ sodium silicate L) of AO to the fresh paste did not affect the thermal stability and the mechanical properties (above 6 MPa in flexural strength and above 20 MPa for compressive strength) of the hardened product. UV-Vis spectroscopy revealed that the dye did not undergo chemical degradation nor was it released from the geopolymer matrix. The results reported herein provide a useful approach for the safe removal of toxic macromolecules by means of encapsulation within the geopolymer matrix.
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Murrieta-Rico FN, Yocupicio-Gaxiola RI, Antúnez-García J, Reyes-Serrato A, Sánchez P, Petranovskii V. Textile Functionalization Using LTA and FAU Zeolitic Materials. Polymers (Basel) 2022; 15. [PMID: 36616448 DOI: 10.3390/polym15010099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 11/26/2022] [Accepted: 12/14/2022] [Indexed: 12/28/2022] Open
Abstract
COVID-19 has drawn worldwide attention to the need for personal protective equipment. Face masks can be transformed from passive filters into active protection. For this purpose, it is sufficient to apply materials with oligodynamic effect to the fabric of the masks, which makes it possible to destroy infectious agents that have fallen on the mask with aerosol droplets from the air stream. Zeolites themselves are not oligodynamic materials, but can serve as carriers for nanoparticles of metals and/or compounds of silver, zinc, copper, and other materials with biocidal properties. Such a method, when the particles are immobilized on the surface of the substrate, will increase the lifetime of the active oligodynamic material. In this work, we present the functionalization of textile materials with zeolites to obtain active personal protective equipment with an extended service life. This is done with the aim to extend the synthesis of zeolitic materials to polymeric fabrics beyond cotton. The samples were characterized using XRD, SEM, and UV-Vis spectroscopy. Data of physicochemical studies of the obtained hybrid materials (fabrics with crystals grown on fibers) will be presented, with a focus on the effect of fabrics in the growth process of zeolites.
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Drzewiecka-Antonik A, Struga M, Głogowska A, Augustynowicz-Kopec E, Dobrzyńska K, Chrzanowska A, Wolska A, Rejmak P, Klepka MT, Wrzosek M, Bielenica A. Synthesis, Structural Characterization and Biological Activity Evaluation of Novel Cu(II) Complexes with 3-(trifluoromethyl)phenylthiourea Derivatives. Int J Mol Sci 2022; 23:ijms232415694. [PMID: 36555333 PMCID: PMC9779606 DOI: 10.3390/ijms232415694] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 12/05/2022] [Accepted: 12/06/2022] [Indexed: 12/14/2022] Open
Abstract
Copper complexes with 1,3-disubstituted thiourea derivatives, all containing 3-(trifluoromethyl)phenyl tail and 1-alkyl/halogen-phenyl substituent, were synthesized. The experimental spectroscopic studies and theoretical calculation revealed that two ligands coordinate to Cu(II) in a bidentate fashion via thiocarbonyl S and deprotonated N atoms of thiourea moiety. Such monomers are characteristic of alkylphenylthiourea complexes, whereas the formation of a sandwich-type dimer is observed for halogeno derivatives. For the first time, the structural identifications of CuN2S2-based complexes using experimental and theoretical X-ray absorption near edge structure are demonstrated. The dimeric halogeno derivatives showed higher antimicrobial activity in comparison with alkylphenylthiourea complexes. The Cu(II) complex of 1-(4-chloro-3-nitrophenyl)-3-[3-(trifluoromethyl)phenyl]thiourea was active against 19 strains of methicillin-resistant Staphylococci (MIC = 2 µg/mL). This derivative acted as a dual inhibitor of DNA gyrase and topoisomerase IV isolated from Staphylococcus aureus. Additionally, complexes of halogenphenylthiourea strongly inhibited the growth of mycobacteria isolated from tuberculosis patients, even fourfold stronger than the reference isoniazid. The complexes exerted weak to moderate antitumor activity (towards SW480, SW620, and PC3) being non-toxic towards normal HaCaT cells.
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Affiliation(s)
| | - Marta Struga
- Chair and Department of Biochemistry, Medical University of Warsaw, Banacha 1, PL-02097 Warsaw, Poland
| | - Agnieszka Głogowska
- Institute of Tuberculosis and Lung Diseases, Microbiology Department, Plocka 26, PL-01138 Warsaw, Poland
| | - Ewa Augustynowicz-Kopec
- Institute of Tuberculosis and Lung Diseases, Microbiology Department, Plocka 26, PL-01138 Warsaw, Poland
| | - Katarzyna Dobrzyńska
- Department of Pharmaceutical Microbiology, Faculty of Pharmacy, Warsaw Medical University, 3 Oczki Street, PL-02007 Warsaw, Poland
| | - Alicja Chrzanowska
- Chair and Department of Biochemistry, Medical University of Warsaw, Banacha 1, PL-02097 Warsaw, Poland
| | - Anna Wolska
- Institute of Physics, Polish Academy of Sciences, Al. Lotnikow 32/46, PL-02668 Warsaw, Poland
| | - Paweł Rejmak
- Institute of Physics, Polish Academy of Sciences, Al. Lotnikow 32/46, PL-02668 Warsaw, Poland
| | - Marcin T. Klepka
- Institute of Physics, Polish Academy of Sciences, Al. Lotnikow 32/46, PL-02668 Warsaw, Poland
| | - Małgorzata Wrzosek
- Department of Biochemistry and Pharmacogenomics, Faculty of Pharmacy, Medical University of Warsaw, Banacha 1, PL-02097 Warsaw, Poland
| | - Anna Bielenica
- Chair and Department of Biochemistry, Medical University of Warsaw, Banacha 1, PL-02097 Warsaw, Poland
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Chen GJ, Lin CM, Shih YH, Jian SR. The Microstructures and Characteristics of NiO Films: Effects of Substrate Temperature. Micromachines (Basel) 2022; 13:1940. [PMID: 36363961 PMCID: PMC9697434 DOI: 10.3390/mi13111940] [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] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Revised: 11/06/2022] [Accepted: 11/08/2022] [Indexed: 06/16/2023]
Abstract
The influence of the substrate temperature on the structural, surface morphological, optical and nanomechanical properties of NiO films deposited on glass substrates using radio-frequency magnetron sputtering was examined by X-ray diffraction (XRD), atomic force microscopy (AFM), UV-Visible spectroscopy and nanoindentation, respectively. The results indicate that the substrate temperature exhibits significant influences on both the grain texturing orientation and surface morphology of the films. Namely, the dominant crystallographic orientation of the films switches from (111) to (200) accompanied by progressively roughening of the surface when the substrate temperature is increased from 300 °C to 500 °C. The average transmittance of the NiO films was also found to vary in the range of 60-85% in the visible wavelength region, depending on the substrate temperature and wavelength. In addition, the optical band gap calculated from the Tauc plot showed an increasing trend from 3.18 eV to 3.56 eV with increasing substrate temperature. Both the hardness and Young's modulus of NiO films were obtained by means of the nanoindentation continuous contact stiffness measurements mode. Moreover, the contact angle between the water droplet and film surface also indicated an intimate correlation between the surface energy, hence the wettability, of the film and substrate temperature.
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Affiliation(s)
- Guo-Ju Chen
- Department of Materials Science and Engineering, I-Shou University, Kaohsiung 840, Taiwan
| | - Chih-Ming Lin
- Department of Physics, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Yung-Hui Shih
- Department of Materials Science and Engineering, I-Shou University, Kaohsiung 840, Taiwan
| | - Sheng-Rui Jian
- Department of Materials Science and Engineering, I-Shou University, Kaohsiung 840, Taiwan
- Department of Applied Physics, National University of Kaohsiung, Kaohsiung 81148, Taiwan
- Department of Fragrance and Cosmetic Science, College of Pharmacy, Kaohsiung Medical University, 100 Shi-Chuan 1st Road, Kaohsiung 80708, Taiwan
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21
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Nascentes CC, Aguilar I, Gil-Ramírez G, Gonzalez-Rodriguez J. Electropolymerization of Metallo-Octaethylporphyrins: A Study to Explore Their Sensing Capabilities. Materials (Basel) 2022; 15:6598. [PMID: 36233940 PMCID: PMC9571886 DOI: 10.3390/ma15196598] [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] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Revised: 09/19/2022] [Accepted: 09/20/2022] [Indexed: 06/16/2023]
Abstract
The electropolymerization of metallo-octaethylporphyrins (OEP) containing copper, zinc or nickel metal were performed using cyclic voltammetry at three different potential ranges. The electropolymerized porphyrins were characterized by UV-Vis and Raman spectroscopies and the Soret band (393-445 nm) and Raman bands were used to assess the degree of electropolymerization obtained. The application for an analytical use of the modified electrodes to determine phenobarbital in aqueous solution was evaluated. The electropolymerized CuOEP produced at potentials ranging from 0.0 to 2.2 V was the best performer with a limit of detection (LoD) of 10 mg L-1 (43.07 µM), a linear range of 10-150 mg L-1 (43.07 to 646 µM), an average precision of 4.3% (%RSD) and an average % recovery of 101.34%. These results indicate that the CuOEP-modified electrode is suitable for the analysis of phenobarbital in human samples, as the concentration range varies from 10 to 40 mg L-1 (43.07 to 172.27 µM), typically found in antiepileptic treatments, to those at the toxic level (172-258 µM) or lethal levels (345-650 µM).
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Affiliation(s)
- Clésia C. Nascentes
- Department of Chemistry, Federal University of Minas Gerais, P.O. Box 702, Belo Horizonte 31270-901, Brazil
| | - Ivette Aguilar
- School of Chemistry, University of Lincoln, Brayford Pool, Lincoln LN6 7TS, UK
| | - Guzmán Gil-Ramírez
- School of Chemistry, University of Lincoln, Brayford Pool, Lincoln LN6 7TS, UK
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22
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Bangaru S, Madhu G, Srinivasan M, Manivannan P. Exploring flexibility, intermolecular interactions and ADMET profiles of anti-influenza agent isorhapontigenin: A quantum chemical and molecular docking study. Heliyon 2022; 8:e10122. [PMID: 36039137 PMCID: PMC9418217 DOI: 10.1016/j.heliyon.2022.e10122] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [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: 11/05/2021] [Revised: 01/07/2022] [Accepted: 07/25/2022] [Indexed: 12/05/2022] Open
Abstract
Isorhapontigenin (IRPG) drug emerges as promising efficient inhibitor for H1N1 and H3N2 subtypes which belong to influenza A virus; reported with IC50 value of 35.62 and 63.50 μM respectively. When experimental data are compared to the predicted geometrical parameters and vibrational assignments (FT-IR and FT-Raman), the findings indicated a strong correlation. The absorption bands of π→π∗ transitions are revealed through UV-Vis electronic properties; this confirms that the IRPG molecule shows strong bands. Through NBO and HOMO-LUMO analysis, the kinetic stability and chemical reactivity of the IRPG molecule were investigated. By using an MEP map, the IRPG's electrophilic and nucleophilic site selectivity was assessed. In a molecular docking investigation, the IRPG molecule shows a stronger inhibition constant and binding affinity for the H1N1 and H3N2 influenza virus. The IRPG molecule thus reveals good biological actions in nature and can be used as a potential therapeutic drug candidate for H1N1 and H3N2 virus A influenza.
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Affiliation(s)
- Sathya Bangaru
- Department of Physics, Periyar University PG Extension Centre, Dharmapuri, 636 701, Tamilnadu, India.,SSN Research Centre, SSN College of Engineering, Kalavakkam, Chennai, 603 110, Tamilnadu, India
| | - Govindammal Madhu
- Department of Physics, Periyar University PG Extension Centre, Dharmapuri, 636 701, Tamilnadu, India
| | - M Srinivasan
- SSN Research Centre, SSN College of Engineering, Kalavakkam, Chennai, 603 110, Tamilnadu, India
| | - Prasath Manivannan
- Department of Physics, Periyar University PG Extension Centre, Dharmapuri, 636 701, Tamilnadu, India
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23
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Conradie MM. UV-Vis Spectroscopy, Electrochemical and DFT Study of Tris(β-diketonato)iron(III) Complexes with Application in DSSC: Role of Aromatic Thienyl Groups. Molecules 2022; 27:3743. [PMID: 35744869 DOI: 10.3390/molecules27123743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Revised: 06/01/2022] [Accepted: 06/07/2022] [Indexed: 11/17/2022]
Abstract
A series of tris(β-diketonato)iron(III) complexes, with the β-diketonato ligand bearing different substituent groups, have been synthesized and characterized by Fourier transform infrared (FT-IR), ultraviolet-visible (UV-Vis) and mass spectroscopic methods. The maximum band UV-Vis absorption wavelengths of the tris(β-diketonato)iron(III) complexes were in the range of 270–380 nm. The complexes have very good solubility in various solvents such as chloroform, dichloromethane, ethyl acetate, tetrahydrofurane, dimethylsulphoxide and dimethylformamide. After the syntheses and characterization processes, spectroscopic and electrochemical properties of these tris(β-diketonato)iron(III) complexes were investigated. A density functional theory (DFT) study related to the spectroscopic and electrochemical properties of the tris(β-diketonato)iron(III) complexes was used to investigate the possible application of these complexes as dye sensitizers or redox mediators in dye-sensitized solar cells.
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Ashrafi N, Shareghi B, Farhadian S, Hosseini-Koupaei M. The effect of putrescine on the lysozyme activity and structure: Spectroscopic approaches and molecular dynamic simulation. Colloids Surf B Biointerfaces 2022; 213:112402. [PMID: 35151046 DOI: 10.1016/j.colsurfb.2022.112402] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Revised: 02/04/2022] [Accepted: 02/05/2022] [Indexed: 10/19/2022]
Abstract
The present research addressed the influence of polyamine (putrescine) on the compound as well as function of lysozyme; accordingly, UV- Visible, fluorescence spectroscopy and simulation method were applied to fulfill this goal. Lysozyme's structural variability was examined at various putrescine concentrations; also, the putrescine binding to lysozyme was addressed using spectrofluorescence, circular dichroism (CD) and UV-Vis measurements. The obtained results indicated that with raising the putrescine concentration, the intrinsic quenching fluorescence of lysozyme was decreased based on the static mechanism. Analysis of thermodynamic parameters also indicated that van der Waals as well as hydrogen bond forces served a fundamental role in determining the resulting stability; this was in agreement with modeling studies. Measurement of UV absorption spectroscopy, fluorescence spectroscopy, and circular dichroism spectroscopy also demonstrated that lysozyme's second and tertiary structures were altered in a putrescine concentration-dependent manner. Putrescine inhibited lysozyme's enzymatic activity, displaying its affinity with the lysozyme's active site. Further, molecular simulation conducted revealed that putrescine could have spontaneous binding to lysozyme, changing its structure, thus further emphasizing the experimental results.
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Chen ZF, Lin QB, Dong B, Zhong HN, Wang ZW. Comparison of the ability of UV-Vis and UPLC-Q-TOF-MS combined with chemometrics to discriminate recycled and virgin polyethylene. J Hazard Mater 2022; 423:127165. [PMID: 34844336 DOI: 10.1016/j.jhazmat.2021.127165] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 07/05/2021] [Revised: 08/21/2021] [Accepted: 09/05/2021] [Indexed: 06/13/2023]
Abstract
A growing attention is attracted to the use of recycled plastics as food contact materials, and its chemical safety research and discrimination approach are indispensable. In current study, ultraviolet-visible spectrometry (UV-Vis) and ultra-performance liquid chromatography quadrupole time-of-flight mass spectrometry (UPLC-Q-TOF-MS) were used to provide spectral and mass fingerprinting for polyethylene (PE). Coupling with chemometrics, two methods were developed to discriminate recycled and virgin PE. UV-Vis combined with chemometrics could be a more accessible, simpler and faster approach. 237-331 nm in UV spectrum was regarded as marker region selected by orthogonal partial least-squares discrimination analysis (OPLS-DA) and the accuracy of both calibration and validation set could reach 100% in linear discrimination analysis (LDA) based on this region. Besides, 2314 ions were detected by UPLC-Q-TOF-MS and processed by MS-DIAL. 48 candidate chemicals were identified, including ketone, esters, carboxylic acid, alcohols and phenols, amine, nitriles, aldehydes and others. Possible origins of these compounds could be classified as plastic, food, drug, cosmetics and pesticide related. Many of these compounds are highly toxic, especially pesticide related, indicating that recycling in closed loop or sorting by the recycled plastic articles is very necessary if the recycled PE is going to be used as food contact material.
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Affiliation(s)
- Zhi-Feng Chen
- Key Laboratory of Product Packaging and Logistics, Packaging Engineering Institute, Jinan University, Zhuhai 519070, China
| | - Qin-Bao Lin
- Key Laboratory of Product Packaging and Logistics, Packaging Engineering Institute, Jinan University, Zhuhai 519070, China.
| | - Ben Dong
- Guangdong Provincial Key Laboratory of Import and Export Technical Measures of Animal, Plant and Food, Guangzhou Customs Technology Center, Guangzhou, Guangdong 510623, China
| | - Huai-Ning Zhong
- Guangdong Provincial Key Laboratory of Import and Export Technical Measures of Animal, Plant and Food, Guangzhou Customs Technology Center, Guangzhou, Guangdong 510623, China; China Certification and Inspection Group Guangdong Co. Ltd, Guangzhou 510623, China
| | - Zhi-Wei Wang
- Key Laboratory of Product Packaging and Logistics, Packaging Engineering Institute, Jinan University, Zhuhai 519070, China
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26
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Amjad R, Mubeen B, Ali SS, Imam SS, Alshehri S, Ghoneim MM, Alzarea SI, Rasool R, Ullah I, Nadeem MS, Kazmi I. Green Synthesis and Characterization of Copper Nanoparticles Using Fortunella margarita Leaves. Polymers (Basel) 2021; 13:4364. [PMID: 34960915 PMCID: PMC8705435 DOI: 10.3390/polym13244364] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [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: 11/08/2021] [Revised: 12/09/2021] [Accepted: 12/09/2021] [Indexed: 01/19/2023] Open
Abstract
The use of biomaterials in the synthesis of nanoparticles is one of the most up-to-date focuses in modern nanotechnologies and nanosciences. More and more research on green methods of producing metal oxide nanoparticles (NP) is taking place, with the goal to overcome the possible dangers of toxic chemicals for a safe and innocuous environment. In this study, we synthesized copper nanoparticles (CuNPs) using Fortunella margarita leaves' extract, which reflects its novelty in the field of nanosciences. The visual observation of a color change from dark green to bluish green clearly shows the instant and spontaneous formation of CuNPs when the phytochemicals of F. margarita come in contact with Cu+2 ions. The synthesis of CuNPs was carried out at different conditions, including pH, temperature, concentration ratio and time, and were characterized with UV-Vis absorption spectra, scanning electron microscope (SEM) and X-ray diffraction (XRD). The UV-Vis analysis reveals the surface plasmon resonance property (SPR) of CuNPs, showing a characteristic absorption peak at 679 nm, while SEM reveals the spherical but agglomerated shape of CuNPs of the size within the range of 51.26-56.66 nm.
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Affiliation(s)
- Rutaba Amjad
- Institute of Molecular Biology and Biotechnology, The University of Lahore, Lahore 5400, Pakistan
| | - Bismillah Mubeen
- Institute of Molecular Biology and Biotechnology, The University of Lahore, Lahore 5400, Pakistan
| | - Syed Shahbaz Ali
- School of Physical Sciences, University of the Punjab, Lahore 54590, Pakistan
| | - Syed Sarim Imam
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh 11451, Riyadh, Saudi Arabia
| | - Sultan Alshehri
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh 11451, Riyadh, Saudi Arabia
| | - Mohammed M Ghoneim
- Department of Pharmacy Practice, College of Pharmacy, AlMaarefa University, Ad Diriyah 13713, Riyadh, Saudi Arabia
| | - Sami I Alzarea
- Department of Pharmacology, College of Pharmacy, Jouf University, Sakaka 72341, Aljouf, Saudi Arabia
| | - Rabia Rasool
- Institute of Molecular Biology and Biotechnology, The University of Lahore, Lahore 5400, Pakistan
| | - Inam Ullah
- Institute of Molecular Biology and Biotechnology, The University of Lahore, Lahore 5400, Pakistan
| | - Muhammad Shahid Nadeem
- Department of Biochemistry, Faculty of Science, King Abdulaziz University, Jeddah 21589, Makkah, Saudi Arabia
| | - Imran Kazmi
- Department of Biochemistry, Faculty of Science, King Abdulaziz University, Jeddah 21589, Makkah, Saudi Arabia
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27
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Radder SB, Melavanki R, Hiremath SM, Kusanur R, Khemalapure SS, Jeyaseelan SC. Synthesis, spectroscopic (FT-IR, FT-Raman, NMR & UV-Vis), reactive (ELF, LOL, Fukui), drug likeness and molecular docking insights on novel 4-[3-(3-methoxy-phenyl)-3-oxo-propenyl]-benzonitrile by experimental and computational methods. Heliyon 2021; 7:e08429. [PMID: 34877424 PMCID: PMC8632848 DOI: 10.1016/j.heliyon.2021.e08429] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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: 09/16/2021] [Revised: 10/21/2021] [Accepted: 11/16/2021] [Indexed: 12/22/2022] Open
Abstract
The spectroscopic analysis such as FT-IR, FT-Raman, UV-Vis and NMR are conducted for the synthesized molecule by both experimental and theoretical approach. The theoretical computations were achieved by DFT method with B3LYP functional and 6-311 ++ G (d, P) basis set. Firstly the geometrical parameters obtained by DFT are compared with the related experimental parameters. Experimental FT-IR and FT-Raman spectra of the title molecule have been acquired. The vibrational analysis is conducted and the assignments concerned to the observed bands are mentioned through the potential energy distribution (PED). The GIAO method was employed for theoretical NMR analysis and the results are compared with experimental chemical shifts. In accumulation to these analyses NLO, NBO, FMO and MEP analysis have been conducted to understand the nature of the molecule. ELF and LOL were performed. The drug likeness and molecular docking studies also conducted. The potency of inhibition of molecule against MPRO and PLPRO receptors has been performed using molecular docking studies.
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Affiliation(s)
- Shivaraj B. Radder
- Department of Physics, M S Ramaiah Institute of Technology, Bangalore, 560054, Karnataka, India
- Affiliated to Visvesvaraya Technological University, Belgaum, 590018, Karnataka, India
| | - Raveendra Melavanki
- Department of Physics, M S Ramaiah Institute of Technology, Bangalore, 560054, Karnataka, India
- Affiliated to Visvesvaraya Technological University, Belgaum, 590018, Karnataka, India
| | - Sudhir M. Hiremath
- Department of P.G. Studies in Physics, KLE Society's J.T. College, Gadag, 582101, Karnataka, India
| | - Raviraj. Kusanur
- Department of Chemistry, R.V. College of Engineering, Bangalore, 560059, Karnataka, India
| | - Seema S. Khemalapure
- P.G. Department of Studies and Research in Physics, KLE Society's P.C. Jabin Science College, Hubballi, 580031, Karnataka, India
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Guo D, Herrera JE. Influence of drinking water quality on the formation of corrosion scales in lead-bearing drinking water distribution systems. J Environ Sci Health A Tox Hazard Subst Environ Eng 2021; 56:1316-1327. [PMID: 34662261 DOI: 10.1080/10934529.2021.1989938] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 05/17/2021] [Revised: 09/15/2021] [Accepted: 09/16/2021] [Indexed: 06/13/2023]
Abstract
Lead in drinking water occurs in drinking water distribution systems (DWDS) where lead pipes are used as service lines. Using data gathered from 4 different Canadian cities, we link drinking water quality to composition of corrosion scales obtained on exhumed lead pipes servicing those municipalities. The data presented encompasses a 10-year span and a detailed layer profile analysis of the solids present in lead bearing service lines; where different layers within the corrosion scale formed inside lead pipes are identified and thoroughly characterized. The results obtained clearly show that the corrosion layers in direct contact with drinking water are rich in lead oxides phases and aluminosilicates. In contrast, lead carbonates are the main phases present on corrosion scales in direct contact with the metallic lead pipe. This heterogeneity on phase distribution is correlated to the radial distance from the corrosion scales to the water/solid interphase and water quality servicing those municipalities. Statistical analysis suggests that dissolved Al, Mn, Cu, Ni, and As accumulate on the corrosion scales with preferential accumulation of specific elements heavily dependent on distinct municipality water quality.
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Affiliation(s)
- Daoping Guo
- Department of Chemical and Biochemical Engineering, Western University, London, Ontario, Canada
| | - Jose E Herrera
- Department of Chemical and Biochemical Engineering, Western University, London, Ontario, Canada
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29
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Flieger J, Franus W, Panek R, Szymańska-Chargot M, Flieger W, Flieger M, Kołodziej P. Green Synthesis of Silver Nanoparticles Using Natural Extracts with Proven Antioxidant Activity. Molecules 2021; 26:4986. [PMID: 34443574 DOI: 10.3390/molecules26164986] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Revised: 08/14/2021] [Accepted: 08/15/2021] [Indexed: 12/20/2022] Open
Abstract
Natural extracts are a rich source of biomolecules that are useful not only as antioxidant drugs or diet supplements but also as complex reagents for the biogenic synthesis of metallic nanoparticles. The natural product components can act as strong reducing and capping substrates guaranteeing the stability of formed NPs. The current work demonstrates the suitability of extracts of Camellia sinensis, Ilex paraguariensis, Salvia officinalis, Tilia cordata, Levisticum officinale, Aegopodium podagraria, Urtica dioica, Capsicum baccatum, Viscum album, and marine algae Porphyra Yezoensis for green synthesis of AgNPs. The antioxidant power of methanolic extracts was estimated at the beginning according to their free radical scavenging activity by the DPPH method and reducing power activity by CUPRAC and SNPAC (silver nanoparticle antioxidant capacity) assays. The results obtained by the CUPRAC and SNAPC methods exhibited excellent agreement (R2~0.9). The synthesized AgNPs were characterized by UV-vis spectroscopy, Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX), dynamic light scattering (DLS) particle size, and zeta potential. The UV-vis absorption spectra showed a peak at 423 nm confirming the presence of AgNPs. The shapes of extract-mediated AgNPs were mainly spherical, spheroid, rod-shaped, agglomerated crystalline structures. The NPs exhibited a high negative zeta potential value in the range from -49.8 mV to -56.1 mV, proving the existence of electrostatic stabilization. FTIR measurements indicated peaks corresponding to different functional groups such as carboxylic acids, alcohol, phenol, esters, ethers, aldehydes, alkanes, and proteins, which were involved in the synthesis and stabilization of AgNPs. Among the examined extracts, green tea showed the highest activity in all antioxidant tests and enabled the synthesis of the smallest nanoparticles, namely 62.51, 61.19, and 53.55 nm, depending on storage times of 30 min, 24 h, and 72 h, respectively. In turn, the Capsicum baccatum extract was distinguished by the lowest zeta potential, decreasing with storage time from -66.0 up to -88.6 mM.
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Su K, Huang X, Wei W, Zeng X, Xiang S, Yang H. A ready-to-use fluorescence probe of Pd 2+ in water: novel tricyclic heterocyclic base on 1,3,4-oxadiazole. LUMINESCENCE 2021; 36:1690-1696. [PMID: 34173312 DOI: 10.1002/bio.4110] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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: 04/09/2021] [Revised: 06/02/2021] [Accepted: 06/12/2021] [Indexed: 12/19/2022]
Abstract
A ready-to-use hetero-tricyclic compound, 5,5'-(furan-2,5-diyl) bis (1,3,4- oxadiazol-2-amine) (5), was synthesized with a good yield; it has an suitable fluorescence characteristic and research founded that it can respond to trace Pd2+ in water at a normal pH range. A fluorescence titration revealed the detection limit for Pd2+ was as low as 3.97 × 10-9 M. Density-functional theory calculation using Guassian09 implied that the breakage of conjugation and coplanarity of compound 5 led to fluorescence quenching. Compound 5 could be applied as a chemical probe to detect trace amounts of Pd2+ with good accuracy, fast response time, excellent selectivity, and high sensitivity. FT-IR, NMR, and MS were used to characterize the chemical structure of compound 5.
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Affiliation(s)
- Ke Su
- Department of Chemistry and Chemical Engineering, Sichuan University of Arts and Science, Dazhou, Sichuan, China.,Key Laboratory of Exploitation and Study of Distinctive Plants in Education Department of Sichuan Province, Dazhou, Sichuan, China
| | - Xiaomei Huang
- Department of Chemistry and Chemical Engineering, Sichuan University of Arts and Science, Dazhou, Sichuan, China
| | - Wei Wei
- Key Laboratory of Exploitation and Study of Distinctive Plants in Education Department of Sichuan Province, Dazhou, Sichuan, China
| | - Xiaotong Zeng
- Department of Chemistry and Chemical Engineering, Sichuan University of Arts and Science, Dazhou, Sichuan, China
| | - Siyu Xiang
- School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang, Sichuan, China
| | - Haijun Yang
- School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang, Sichuan, China
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31
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Kınaytürk NK, Tunalı B, Türköz Altuğ D. Eggshell as a biomaterial can have a sorption capability on its surface: A spectroscopic research. R Soc Open Sci 2021; 8:210100. [PMID: 34150316 PMCID: PMC8206697 DOI: 10.1098/rsos.210100] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Accepted: 05/11/2021] [Indexed: 06/01/2023]
Abstract
In this study, eggshell as a biomaterial was used as an adsorbent. This natural waste material is easy to access and cost-free. The surface of the eggshell with its porous structure showed affinity to adsorb damaging chemicals. In particular insecticides cause serious environmental pollution in agriculture, and this is a general problem all over the world. The aim was to remove insecticides from the environment and monitor the pesticides on the surface of eggshells by atomic force microscopy (AFM) images, Fourier transform infrared (FTIR) and UV/Vis spectroscopic techniques. Five types of eggshells, Denizli Hen, Coturnix Coturnix Japonica, Light Brahma Chicken, Alectoris Chukar and ISA Tinted -White, were used. Since they are commonly used, Cypermethrin, Deltamethrin and Indoxacarb were chosen as insecticide samples. The interaction effect of insecticides on the surface of eggshells was determined by AFM images; it was seen that the semispherical surface structures of the eggshells were flattened after adsorption. FTIR spectroscopy was used both to detect structural analysis and to determine the adsorption influence. In addition, UV-Vis spectroscopy was performed to evaluate the adsorption and desorption process. Porous media of different types of eggshells with an aqueous solution of insecticides had an electronegativity attractive surface which makes it an ideal adsorbent via hydroxyl groups.
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Affiliation(s)
- Neslihan Kaya Kınaytürk
- Faculty of Arts and Sciences, Department of Nanoscience and Nanotechnology, Burdur Mehmet Akif Ersoy University, Burdur, Turkey
| | - Belgin Tunalı
- Faculty of Arts and Sciences, Department of Nanoscience and Nanotechnology, Burdur Mehmet Akif Ersoy University, Burdur, Turkey
| | - Deniz Türköz Altuğ
- Isparta Vocational School of Health Services, Süleyman Demirel University, East Campus, Isparta 32260, Turkey
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32
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Rauf S, Trzesowska-Kruszynska A, Sierański T, Świątkowski M. Copper(II) 2,2-Bis(Hydroxymethyl)Propionate Coordination Compounds with Hexamethylenetetramine: From Mononuclear Complex to One-Dimensional Coordination Polymer. Molecules 2021; 26:molecules26113358. [PMID: 34199524 PMCID: PMC8199667 DOI: 10.3390/molecules26113358] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Revised: 05/28/2021] [Accepted: 05/29/2021] [Indexed: 11/16/2022] Open
Abstract
Three new copper coordination compounds derived from 2,2-bis(hydroxymethyl)propionic acid (dmpa) and hexamethylenetetramine (hmta) were obtained and their crystal structures were determined. The stoichiometry of the reagents applied in the syntheses reflects the metal to ligand molar ratio in the formed solid products. Due to the multiple coordination modes of the used ligands, wide structural diversity was achieved among synthesized compounds, i.e., mononuclear [Cu(dmp)2(hmta)2(H2O)] (1), dinuclear [Cu2(dmp)4(hmta)2] (2), and 1D coordination polymer [Cu2(dmp)4(hmta)]n (3). Their supramolecular structures are governed by O—H•••O and O—H•••N hydrogen bonds. The compounds were characterized in terms of absorption (UV-Vis and IR) and thermal properties. The relationships between structural features and properties were discussed in detail. Owing to discrepancies in the coordination mode of a dmp ligand, bidentate chelating in 1, and bidentate bridging in 2 and 3, there is a noticeable change in the position of the bands corresponding to the stretching vibrations of the carboxylate group in the IR spectra. The differences in the structures of the compounds are also reflected in the nature and position of the UV-Vis absorption maxima, which are located at lower wavelengths for 1.
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Kaczmarek K, Leniart A, Lapinska B, Skrzypek S, Lukomska-Szymanska M. Selected Spectroscopic Techniques for Surface Analysis of Dental Materials: A Narrative Review. Materials (Basel) 2021; 14:2624. [PMID: 34067921 PMCID: PMC8156406 DOI: 10.3390/ma14102624] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/17/2021] [Revised: 05/09/2021] [Accepted: 05/11/2021] [Indexed: 12/18/2022]
Abstract
The presented work focuses on the application of spectroscopic methods, such as Infrared Spectroscopy (IR), Fourier Transform Infrared Spectroscopy (FT-IR), Raman spectroscopy, Ultraviolet and Visible Spectroscopy (UV-Vis), X-ray spectroscopy, and Mass Spectrometry (MS), which are widely employed in the investigation of the surface properties of dental materials. Examples of the research of materials used as tooth fillings, surface preparation in dental prosthetics, cavity preparation methods and fractographic studies of dental implants are also presented. The cited studies show that the above techniques can be valuable tools as they are expanding the research capabilities of materials used in dentistry.
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Affiliation(s)
- Katarzyna Kaczmarek
- Department of Inorganic and Analytical Chemistry, Faculty of Chemistry, University of Lodz, 12 Tamka St., 91-403 Lodz, Poland; (A.L.); (S.S.)
| | - Andrzej Leniart
- Department of Inorganic and Analytical Chemistry, Faculty of Chemistry, University of Lodz, 12 Tamka St., 91-403 Lodz, Poland; (A.L.); (S.S.)
| | - Barbara Lapinska
- Department of General Dentistry, Medical University of Lodz, 251 Pomorska St., 92-213 Lodz, Poland;
| | - Slawomira Skrzypek
- Department of Inorganic and Analytical Chemistry, Faculty of Chemistry, University of Lodz, 12 Tamka St., 91-403 Lodz, Poland; (A.L.); (S.S.)
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Aziz SB, Nofal MM, Ghareeb HO, Dannoun EMA, Hussen SA, Hadi JM, Ahmed KK, Hussein AM. Characteristics of Poly(vinyl Alcohol) (PVA) Based Composites Integrated with Green Synthesized Al 3+-Metal Complex: Structural, Optical, and Localized Density of State Analysis. Polymers (Basel) 2021; 13:polym13081316. [PMID: 33923856 PMCID: PMC8073073 DOI: 10.3390/polym13081316] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [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: 03/14/2021] [Revised: 04/06/2021] [Accepted: 04/13/2021] [Indexed: 12/18/2022] Open
Abstract
The influence of dispersing Al-metal complex on the optical properties of PVA was investigated using UV–visible spectroscopy. Polymer composite films with various Al3+-complex amounts in the PVA matrix were arranged by solution casting technique by means of distilled water as a widespread solvent. The formation of Al3+-metal complex was verified through Ultraviolet–visible (UV-Vis) and Fourier-transform infrared spectroscopy (FTIR) examinations. The addition of Al-complex into the polymer matrix led to the recovery of the optical parameters such as dielectric constant (εr and εi) and refractive index (n). The variations of real and imaginary parts of complex dielectric constant as a function of photon wavelength were studied to calculate localized charge density values (N/m*), high-frequency dielectric constant, relaxation time, optical mobility, optical resistivity, and plasma angular frequency (ωp) of electrons. In proportion with Al3+-complex content, the N/m* values were amplified from 3.68 × 1055 kg−1 m−3 to 109 × 1055 kg−1 m−3. The study of optical parameters may find applications within optical instrument manufacturing. The optical band gap was determined from Tauc’s equation, and the type of electronic transition was specified. A remarkable drop in the optical band gap was observed. The dispersion of static refractive index (no) of the prepared composites was analyzed using the theoretical Wemple–DiDomenico single oscillator model. The average oscillator energy (Eo) and oscillator dispersion energy (Ed) parameters were estimated.
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Affiliation(s)
- Shujahadeen B. Aziz
- Hameed Majid Advanced Polymeric Materials Research Lab., Physics Department, College of Science, University of Sulaimani, Qlyasan Street, Sulaimani 46001, Iraq; (S.A.H.); (K.K.A.); (A.M.H.)
- Department of Civil Engineering, College of Engineering, Komar University of Science and Technology, Sulaimani 46001, Iraq
- Correspondence:
| | - Muaffaq M. Nofal
- Department of Mathematics and General Sciences, Prince Sultan University, P.O. Box 66833, Riyadh 11586, Saudi Arabia;
| | - Hewa O. Ghareeb
- Chemistry Department, College of Science, University of Sulaimani, Qlyasan Street, Sulaimani 46001, Iraq;
| | - Elham M. A. Dannoun
- Associate Director of General Science Department, Woman Campus, Prince Sultan University, P.O. Box 66833, Riyadh 11586, Saudi Arabia;
| | - Sarkawt A. Hussen
- Hameed Majid Advanced Polymeric Materials Research Lab., Physics Department, College of Science, University of Sulaimani, Qlyasan Street, Sulaimani 46001, Iraq; (S.A.H.); (K.K.A.); (A.M.H.)
| | - Jihad M. Hadi
- Department of Medical Laboratory of Science, College of Health Sciences, University of Human Development, Sulaimani 46001, Iraq;
| | - Khayal K. Ahmed
- Hameed Majid Advanced Polymeric Materials Research Lab., Physics Department, College of Science, University of Sulaimani, Qlyasan Street, Sulaimani 46001, Iraq; (S.A.H.); (K.K.A.); (A.M.H.)
| | - Ahang M. Hussein
- Hameed Majid Advanced Polymeric Materials Research Lab., Physics Department, College of Science, University of Sulaimani, Qlyasan Street, Sulaimani 46001, Iraq; (S.A.H.); (K.K.A.); (A.M.H.)
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Chen W, Yu HQ. Advances in the characterization and monitoring of natural organic matter using spectroscopic approaches. Water Res 2021; 190:116759. [PMID: 33360618 DOI: 10.1016/j.watres.2020.116759] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [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: 10/13/2020] [Revised: 12/16/2020] [Accepted: 12/16/2020] [Indexed: 06/12/2023]
Abstract
Natural organic matter (NOM) is ubiquitous in environment and plays a fundamental role in the geochemical cycling of elements. It is involved in a wide range of environmental processes and can significantly affect the environmental fates of exogenous contaminants. Understanding the properties and environmental behaviors of NOM is critical to advance water treatment technologies and environmental remediation strategies. NOM is composed of characteristic light-absorbing/emitting functional groups, which are the "identification card" of NOM and susceptive to ambient physiochemical changes. These groups and their variations can be captured through optical sensing. Therefore, spectroscopic techniques are elegant tools to track the sources, features, and environmental behaviors of NOM. In this work, the most recent advances in molecular spectroscopic techniques, including UV-Vis, fluorescence, infrared, and Raman spectroscopy, for the characterization, measurement, and monitoring of NOM are reviewed, and the state-of-the-art innovations are highlighted. Furthermore, the limitations of current spectroscopic approaches for the exploration of NOM-related environmental processesand how these weaknesses/drawbacks can be addressed are explored. Finally, suggestions and directions are proposed to advance the development of spectroscopic methods in analyzing and elucidating the properties and behaviors of NOM in natural and engineered environments.
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Affiliation(s)
- Wei Chen
- School of Metallurgy and Environment, Central South University, Changsha410083, China
| | - Han-Qing Yu
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei230026, China.
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Krejner E, Sierański T, Świątkowski M, Bogdan M, Kruszyński R. Physicochemical Insight into Coordination Systems Obtained from Copper(II) Bromoacetate and 1,10-Phenanthroline. Molecules 2020; 25:E5324. [PMID: 33203086 DOI: 10.3390/molecules25225324] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2020] [Revised: 11/03/2020] [Accepted: 11/11/2020] [Indexed: 11/16/2022] Open
Abstract
Two different coordination compounds of copper were synthesized from the same building blocks (1,10-phenanthroline, bromoacetate anions, and copper cations). The synthesis parameters were carefully designed and evaluated to allow the change of the resulting compounds molecular structure, i.e., formation of mononuclear (bromoacetato-O,O')(bromoacetato-O)aqua(1,10-phenanthroline-N,N')copper(II) and dinuclear (μ-bromido-1:2κ2)bis(μ-bromoacetato-1κO,2κO')bis(1,10-phenanthroline-N,N')dicopper(II) bromoacetate bromoacetic acid solvate. The crystal, molecular and supramolecular structures of the studied compounds were determined and evaluated in Hirshfeld analysis. The UV-Vis-IR absorption and thermal properties were studied and discussed. For the explicit determination of the influence of compounds structure on radiation absorption in UV-Vis range, density functional theory and time-dependent density functional theory calculations were performed.
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Bettini S, Valli L, Giancane G. Applications of Photoinduced Phenomena in Supramolecularly Arranged Phthalocyanine Derivatives: A Perspective. Molecules 2020; 25:molecules25163742. [PMID: 32824375 PMCID: PMC7463501 DOI: 10.3390/molecules25163742] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Revised: 08/12/2020] [Accepted: 08/13/2020] [Indexed: 01/10/2023] Open
Abstract
This review focuses on the description of several examples of supramolecular assemblies of phthalocyanine derivatives differently functionalized and interfaced with diverse kinds of chemical species for photo-induced phenomena applications. In fact, the role of different substituents was investigated in order to tune peculiar aggregates formation as well as, with the same aim, the possibility to interface these derivatives with other molecular species, as electron donor and acceptor, carbon allotropes, cyclodextrins, protein cages, drugs. Phthalocyanine photo-physical features are indeed really interesting and appealing but need to be preserved and optimized. Here, we highlight that the supramolecular approach is a versatile method to build up very complex and functional architectures. Further, the possibility to minimize the organization energy and to facilitate the spontaneous assembly of the molecules, in numerous examples, has been demonstrated to be more useful and performing than the covalent approach.
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Affiliation(s)
- Simona Bettini
- Department of Engineering of Innovation, University of Salento, Via per Monteroni, 73100 Lecce, Italy;
- National Interuniversity Consortium for Materials Science and Technology, INSTM, Via Giuseppe Giusti, 9, 50121 Florence, Italy;
| | - Ludovico Valli
- National Interuniversity Consortium for Materials Science and Technology, INSTM, Via Giuseppe Giusti, 9, 50121 Florence, Italy;
- Department of Biological and Environmental Sciences and Technologies, University of Salento, Via per Monteroni, 73100 Lecce, Italy
- Correspondence:
| | - Gabriele Giancane
- National Interuniversity Consortium for Materials Science and Technology, INSTM, Via Giuseppe Giusti, 9, 50121 Florence, Italy;
- Department of Cultural Heritage, University of Salento, Via D. Birago, 64, 73100 Lecce, Italy
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Huang Z, Gu Z, Wang Y, Zhang A. Improved oxidation of refractory organics in concentrated leachate by a Fe 2+-enhanced O 3/H 2O 2 process. Environ Sci Pollut Res Int 2019; 26:35797-35806. [PMID: 31705410 DOI: 10.1007/s11356-019-06592-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [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: 03/28/2019] [Accepted: 09/24/2019] [Indexed: 06/10/2023]
Abstract
Concentrated leachate from membrane processes, which contains a mass of refractory organics and salt, has become a new problem for wastewater engineers. In this study, removal of organic contaminants in concentrated landfill leachate was investigated by applying the ferrous ion (Fe2+) catalyzed O3/H2O2 process. The maximum chemical oxygen demand (COD) and absorbance at 254 nm (UV254) removal efficiencies under the optimal conditions (initial pH = 3.0, Fe2+ dosage = 6.500 mM, H2O2 dosage = 18.8 mM and O3 dosage = 52.65 mg min-1) were 48.82% and 63.59%, respectively. These were higher than those achieved using the Fe2+/O3, O3/H2O2, and O3 processes, and biodegradability of the leachate was improved significantly. Moreover, compared with other processes, the Fe2+ had a stronger catalytic effect. Molecular distribution analysis and three-dimensional excitation and emission matrix analysis both indicated that the fulvic acid and humic acid in the concentrated leachate were greatly degraded. Ultraviolet-visible spectra showed that the Fe2+/O3/H2O2 process mainly destroyed unsaturated bonds and decreased the aromatic degree of the leachate. The reaction mechanism of the Fe2+/O3/H2O2 process mainly was attributed to three factors: (1) O3 and H2O2 reacting to produce •OH; (2) H2O2 and O3 decomposing into •OH through the oxidation of Fe2+ to Fe3+; and (3) coagulation by Fe (OH)3. The •OH can rapidly degrade recalcitrant organics, and coagulation also increases the removal of organic matter. Therefore, the Fe2+/O3/H2O2 process was an effective method for treating concentrated landfill leachate.
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Affiliation(s)
- Zheqing Huang
- Key Laboratory of Special Wastewater Treatment of Sichuan Province Higher Education System, College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, 610066, China
| | - Zhepei Gu
- Key Laboratory of Special Wastewater Treatment of Sichuan Province Higher Education System, College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, 610066, China
| | - Ying Wang
- Key Laboratory of Special Wastewater Treatment of Sichuan Province Higher Education System, College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, 610066, China
| | - Aiping Zhang
- Key Laboratory of Special Wastewater Treatment of Sichuan Province Higher Education System, College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, 610066, China.
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Geană EI, Ciucure CT, Apetrei C, Artem V. Application of Spectroscopic UV-Vis and FT-IR Screening Techniques Coupled with Multivariate Statistical Analysis for Red Wine Authentication: Varietal and Vintage Year Discrimination. Molecules 2019; 24:molecules24224166. [PMID: 31744212 PMCID: PMC6891476 DOI: 10.3390/molecules24224166] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Accepted: 11/15/2019] [Indexed: 12/24/2022] Open
Abstract
One of the most important issues in the wine sector and prevention of adulterations of wines are discrimination of grape varieties, geographical origin of wine, and year of vintage. In this experimental research study, UV-Vis and FT-IR spectroscopic screening analytical approaches together with chemometric pattern recognition techniques were applied and compared in addressing two wine authentication problems: discrimination of (i) varietal and (ii) year of vintage of red wines produced in the same oenological region. UV-Vis and FT-IR spectra of red wines were registered for all the samples and the principal features related to chemical composition of the samples were identified. Furthermore, for the discrimination and classification of red wines a multivariate data analysis was developed. Spectral UV-Vis and FT-IR data were reduced to a small number of principal components (PCs) using principal component analysis (PCA) and then partial least squares discriminant analysis (PLS-DA) and linear discriminant analysis (LDA) were performed in order to develop qualitative classification and regression models. The first three PCs used to build the models explained 89% of the total variance in the case of UV-Vis data and 98% of the total variance for FR-IR data. PLS-DA results show that acceptable linear regression fits were observed for the varietal classification of wines based on FT-IR data. According to the obtained LDA classification rates, it can be affirmed that UV-Vis spectroscopy works better than FT-IR spectroscopy for the discrimination of red wines according to the grape variety, while classification of wines according to year of vintage was better for the LDA based FT-IR data model. A clear discrimination of aged wines (over six years) was observed. The proposed methodologies can be used as accessible tools for the wine identity assurance without the need for costly and laborious chemical analysis, which makes them more accessible to many laboratories.
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Affiliation(s)
- Elisabeta-Irina Geană
- National R&D Institute for Cryogenics and Isotopic Technologies—ICIT Rm. Valcea, 4th Uzinei Street, PO Raureni, Box 7, 240050 Rm. Valcea, Romania; (E.-I.G.); (C.T.C.)
| | - Corina Teodora Ciucure
- National R&D Institute for Cryogenics and Isotopic Technologies—ICIT Rm. Valcea, 4th Uzinei Street, PO Raureni, Box 7, 240050 Rm. Valcea, Romania; (E.-I.G.); (C.T.C.)
| | - Constantin Apetrei
- Physics and Environment, Department of Chemistry, Faculty of Science and Environment, “Dunarea de Jos” University of Galati, 111 Domneasca Street, RO-800008 Galati, Romania
- Correspondence: ; Tel.: +40-727-580-914
| | - Victoria Artem
- Research Station for Viticulture and Oenology Murfatlar, Calea Bucuresti str., no. 2, Murfatlar, 905100 Constanta, Romania;
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Mesonzhnik NV, Kuznetsov RM, Postnikov PV, Bochkareva NL, Markin PA, Kurynina KO, Appolonova SA. [Authentication study of the preparation 'Avastin' by means of chemical-toxicological analysis]. Sud Med Ekspert 2019; 62:47-53. [PMID: 31626195 DOI: 10.17116/sudmed20196205147] [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] [Indexed: 11/18/2022]
Abstract
Falsification and use of low-quality drugs of biological origin creates a threat to public health. To a greater extent, costly drugs, including bevacizumab, are exposed to similar abuses. Timely determination of cases of forgery or the improper clinical use of monoclonal antibody preparations is one of the necessary measures that can be taken to limit the risks and preserve the health of patients. This paper presents the results of the investigation of the bevacizumab preparation 'Avastin', which was withdrawn from ophthalmic clinical practice in the course of the investigation. We compared the qualitative and quantitative composition of the drug samples, which were determined using commonly available methods of chemical and toxicological analysis.
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Affiliation(s)
- N V Mesonzhnik
- Laboratory of Pharmacokinetics and Metabolic Analysis, Institute of Pharmacy and Translational Medicine of the Federal State Autonomous Educational Institution of Higher Education, I.M. Sechenov First Moscow State Medical University, Ministry of Health of Russia, Moscow, 119991
| | - R M Kuznetsov
- Laboratory of Pharmacokinetics and Metabolic Analysis, Institute of Pharmacy and Translational Medicine of the Federal State Autonomous Educational Institution of Higher Education, I.M. Sechenov First Moscow State Medical University, Ministry of Health of Russia, Moscow, 119991
| | | | | | - P A Markin
- Laboratory of Pharmacokinetics and Metabolic Analysis, Institute of Pharmacy and Translational Medicine of the Federal State Autonomous Educational Institution of Higher Education, I.M. Sechenov First Moscow State Medical University, Ministry of Health of Russia, Moscow, 119991
| | - K O Kurynina
- Laboratory of Pharmacokinetics and Metabolic Analysis, Institute of Pharmacy and Translational Medicine of the Federal State Autonomous Educational Institution of Higher Education, I.M. Sechenov First Moscow State Medical University, Ministry of Health of Russia, Moscow, 119991
| | - S A Appolonova
- Laboratory of Pharmacokinetics and Metabolic Analysis, Institute of Pharmacy and Translational Medicine of the Federal State Autonomous Educational Institution of Higher Education, I.M. Sechenov First Moscow State Medical University, Ministry of Health of Russia, Moscow, 119991
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Pandit P, Schwartzkopf M, Rothkirch A, Roth SV, Bernstorff S, Gupta A. Structure-Function Correlations in Sputter Deposited Gold/Fluorocarbon Multilayers for Tuning Optical Response. Nanomaterials (Basel) 2019; 9:E1249. [PMID: 31484334 PMCID: PMC6780487 DOI: 10.3390/nano9091249] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Revised: 08/22/2019] [Accepted: 08/26/2019] [Indexed: 11/16/2022]
Abstract
A new strategy to nanoengineer gold/fluorocarbon multilayer (ML) nanostructures is reported. We have investigated the morphological changes occurring at the metal-polymer interface in ML structures with varying volume fraction of gold (Au) and the kinetic growth aspect of the microscale properties of nano-sized Au in plasma polymer fluorocarbon (PPFC). Investigations were carried out at various temperatures and annealing times by means of grazing incidence small-angle and wide-angle X-ray scattering (GISAXS and GIWAXS). We have fabricated a series of MLs with varying volume fraction (0.12, 0.27, 0.38) of Au and bilayer periodicity in ML structure. They show an interesting granular structure consisting of nearly spherical nanoparticles within the polymer layer. The nanoparticle (NP) morphology changes due to the collective effects of NPs diffusion within ensembles in the in-plane vicinity and interlayer with increasing temperature. The in-plane NPs size distinctly increases with increasing temperature. The NPs become more spherical, thus reducing the surface energy. Linear growth of NPs with temperature and time shows diffusion-controlled growth of NPs in the ML structure. The structural stability of the multilayer is controlled by the volume ratio of the metal in polymer. At room temperature, UV-Vis shows a blue shift of the plasmon peak from 560 nm in ML Au/PTFE_1 to 437 nm in Au/PTFE_3. We have identified the fabrication and postdeposition annealing conditions to limit the local surface plasmon resonance (LSPR) shift from Δ λ L S P R = 180 nm (Au/PTFE_1) to Δ λ L S P R = 67 nm (Au/PTFE_3 ML)) and their optical response over a wide visible wavelength range. A variation in the dielectric constant of the polymer in presence of varying Au inclusion is found to be a possible factor affecting the LSPR frequency. Our findings may provide insights in nanoengineering of ML structure that can be useful to systematically control the growth of NPs in polymer matrix.
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Affiliation(s)
- Pallavi Pandit
- Deutsches Elektronen-Synchrotron (DESY), Notkestraße 85, D-22607 Hamburg, Germany.
| | | | - André Rothkirch
- Deutsches Elektronen-Synchrotron (DESY), Notkestraße 85, D-22607 Hamburg, Germany
| | - Stephan V Roth
- Deutsches Elektronen-Synchrotron (DESY), Notkestraße 85, D-22607 Hamburg, Germany
- KTH Royal Institute of Technology, Department of Fibre and Polymer Technology, Teknikringen 56-58, SE-100 44 Stockholm, Sweden
| | - Sigrid Bernstorff
- Elettra-Sincrotrone Trieste, SS 14, Km 163.5, I-34149 Basovizza, Trieste, Italy
| | - Ajay Gupta
- Center for Spintronic Materials, Amity University, UP Noida 201 313, India.
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Levy R, Okun Z, Shpigelman A. The Influence of Chemical Structure and the Presence of Ascorbic Acid on Anthocyanins Stability and Spectral Properties in Purified Model Systems. Foods 2019; 8:E207. [PMID: 31212863 PMCID: PMC6617505 DOI: 10.3390/foods8060207] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Revised: 06/07/2019] [Accepted: 06/10/2019] [Indexed: 11/16/2022] Open
Abstract
The loss of color pigment is an important quality factor of food products. This work aimed to systematically study, in purified model systems, the influence of anthocyanins' structure (by increasing the size of the conjugated sugar) and the presence of ascorbic acid on their stability and spectral properties during storage at two pH levels relevant to medium and high acid foods (6.5 and 4.5, respectively). Anthocyanins (cyanidin (Cy), cyanidin 3-O-β-glucoside (Cy3G) and cyanidin 3-O-β-rutinoside (Cy3R)) displayed first-order degradation rates, presenting higher stability in acidic medium and enhanced stability with increasing size of conjugated sugar. The addition of ascorbic acid resulted in significantly enhanced degradation. Changes in ultra violet visible (UV-VIS) spectral properties presented a decrease in typical color intensity and pointed towards formation of degradation products. Identification and kinetics of formation for cyanidin degradation products were obtained by high performance liquid chromatography system-mass spectrometry (HPLC-MS).
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Affiliation(s)
- Rachel Levy
- Faculty of Biotechnology & Food Engineering, Russell Berrie Nanotechnology Institute, Technion, Israel Institute of Technology, Haifa 3200003, Israel.
| | - Zoya Okun
- Faculty of Biotechnology & Food Engineering, Russell Berrie Nanotechnology Institute, Technion, Israel Institute of Technology, Haifa 3200003, Israel.
| | - Avi Shpigelman
- Faculty of Biotechnology & Food Engineering, Russell Berrie Nanotechnology Institute, Technion, Israel Institute of Technology, Haifa 3200003, Israel.
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Ramos CIV, Almeida SP, Lourenço LMO, Pereira PMR, Fernandes R, Faustino MAF, Tomé JPC, Carvalho J, Cruz C, Neves MGPMS. Multicharged Phthalocyanines as Selective Ligands for G-Quadruplex DNA Structures. Molecules 2019; 24:E733. [PMID: 30781675 PMCID: PMC6412362 DOI: 10.3390/molecules24040733] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2019] [Revised: 02/12/2019] [Accepted: 02/13/2019] [Indexed: 01/21/2023] Open
Abstract
The stabilization of G-Quadruplex DNA structures by ligands is a promising strategy for telomerase inhibition in cancer therapy since this enzyme is responsible for the unlimited proliferation of cancer cells. To assess the potential of a compound as a telomerase inhibitor, selectivity for quadruplex over duplex DNA is a fundamental attribute, as the drug must be able to recognize quadruplex DNA in the presence of a large amount of duplex DNA, in the cellular nucleus. By using different spectroscopic techniques, such as ultraviolet-visible, fluorescence and circular dichroism, this work evaluates the potential of a series of multicharged phthalocyanines, bearing four or eight positive charges, as G-Quadruplex stabilizing ligands. This work led us to conclude that the existence of a balance between the number and position of the positive charges in the phthalocyanine structure is a fundamental attribute for its selectivity for G-Quadruplex structures over duplex DNA structures. Two of the studied phthalocyanines, one with four peripheral positive charges (ZnPc1) and the other with less exposed eight positive charges (ZnPc4) showed high selectivity and affinity for G-Quadruplex over duplex DNA structures and were able to accumulate in the nucleus of UM-UC-3 bladder cancer cells.
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Affiliation(s)
- Catarina I V Ramos
- QOPNA & LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - Susana P Almeida
- QOPNA & LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - Leandro M O Lourenço
- QOPNA & LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - Patrícia M R Pereira
- QOPNA & LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal.
- Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal.
- CNC.IBILI Consortium, University of Coimbra, 3000-548 Coimbra, Portugal.
| | - Rosa Fernandes
- Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal.
- CNC.IBILI Consortium, University of Coimbra, 3000-548 Coimbra, Portugal.
| | - M Amparo F Faustino
- QOPNA & LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - João P C Tomé
- CQE & Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, n1, 1049-001 Lisboa, Portugal.
| | - Josué Carvalho
- CICS-UBI-Centro de Investigação em Ciências da Saúde, Universidade da Beira Interior, Av. Infante D. Henrique, 6200-506 Covilhã, Portugal.
| | - Carla Cruz
- CICS-UBI-Centro de Investigação em Ciências da Saúde, Universidade da Beira Interior, Av. Infante D. Henrique, 6200-506 Covilhã, Portugal.
| | - M Graça P M S Neves
- QOPNA & LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal.
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Hekmat A, Hajebrahimi Z, Motamedzade A. Structural Changes of Human Serum Albumin (HSA) in Simulated Microgravity. Protein Pept Lett 2018; 24:1030-1039. [PMID: 28925865 DOI: 10.2174/0929866524666170918111038] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [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: 07/04/2017] [Revised: 07/24/2017] [Accepted: 09/09/2017] [Indexed: 11/22/2022]
Abstract
BACKGROUND Nowadays, the biological effects of microgravity have been the subject of various experimental researches. Microgravity has been confirmed to affect biological systems. Furthermore, as a result of improvement in space technology for instance a manned mission to the moon, probabilities for human exposed to microgravity have incremented undoubtedly. OBJECTIVES The purpose of this study was to investigate the probable biological effects of microgravity on the human serum albumin (HSA) structure after 3 and 24 h exposure. It is worth mentioning that this is the first effort to investigate the structural alternations of HSA under simulated microgravity condition in biophysico-chemical terms thru different spectroscopic instruments. METHODS 2D clinostat was utilized for simulating microgravity. The UV-Vis, intrinsic and extrinsic fluorescence, dynamic light scattering (DLS) and circular dichroism (CD) spectra of 3.76 µM HSA in Tris-HCl buffer (pH 7.4, 0.1 M) and 3.76 µM HSA in Tris-HCl buffer (pH 7.4, 0.1 M) kept at simulated microgravity for 3 and 24h were verified. RESULTS The UV-Visible, near-UV-CD and intrinsic fluorescence spectroscopy represented that microgravity can remarkably change the tertiary structure of HSA. Additionally, the ANS affinity for HSA incremented when the protein was exposed to simulate microgravity compared to unexposed HSA, which may possibly have appeared attributable to expansion of the structure of simulated HSA. Fluorescence quenching by acrylamide demonstrated higher stern-volmer constant for exposed HSA. The results of zeta potential and dynamic light scattering (DLS) experiments depicted that simulated microgravity cause raise in the surface charge and size of HSA. Far-UV CD data demonstrated that simulated microgravity did not perturb the secondary structures of the protein. CONCLUSION Collectively, our results suggest that HSA after 24 h exposure to microgravity can exhibit a molten globule (MG) structure. This is the first report to demonstrate the molten globule state formation in microgravity condition. Results from this study could give knowledge to understand the role of gravity on protein folding process. In addition, this finding could help to find out safe limits for astronauts and space travelers and to develop adequate countermeasures against any harmful effects of microgravity.
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Affiliation(s)
- Azadeh Hekmat
- Department of Biology, Science and Research Branch, Islamic Azad University, Tehran. Iran
| | - Zahra Hajebrahimi
- Aerospace Research Institute, Ministry of Science Research and Technology, Tehran. Iran
| | - Amir Motamedzade
- Department of Biology, Science and Research Branch, Islamic Azad University, Tehran. Iran
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Borcan LC, Dudas Z, Len A, Fuzi J, Borcan F, Tomescu MC. Synthesis and characterization of a polyurethane carrier used for a prolonged transmembrane transfer of a chili pepper extract. Int J Nanomedicine 2018; 13:7155-7166. [PMID: 30464465 PMCID: PMC6228046 DOI: 10.2147/ijn.s181667] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [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] [Indexed: 12/13/2022] Open
Abstract
Purpose Red chili peppers have been highly valued in gastronomy and traditional medicine since ancient times; it seems that it is not just an ingredient for food but also a good remedy for various medical conditions such as increased blood pressure and high levels of serum triglycerides and cholesterol, myocardial infarction, arthritis, and migraines. The objective of this study is the characterization of a new carrier used for encapsulated extract. Methods Chili pepper extract was obtained and was physically entrapped inside polyurethane microparticles in order to diminish the irritative potential of this extract. The particles were evaluated by Zetasizer measurements, small-angle neutron scattering and thermal analysis, scanning electron microscopy (SEM), and Fourier transform infrared spectroscopy; the encapsulation efficacy and the drug release profile were assessed by UV-Vis spectroscopy. Bioevaluations on mice skin were performed to predict the irritative potential of the samples. Results Two different types of samples were compared: hollow polyurethane microparticles vs polyurethane particles containing the natural extract. The sizes of the particles were very similar, but the sample containing the extract presents three particle populations (the polydispersity index increases from 0.3 to 0.6 from one sample to another). The zeta-potential measurements and SEM images indicate a medium tendency to form clusters, while the UV-Vis study revealed an almost 70% encapsulation efficacy. Conclusion The results suggest that encapsulation of a chili pepper extract inside polyurethane microparticles leads to a non-irritative product with a prolonged release: ~30% of encapsulated extract is released within the first 8 days and a maximum 45% is reached in 2 weeks.
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Affiliation(s)
- Livia-Cristina Borcan
- The 5th Department (Internal Medicine I), Faculty of Medicine, "Victor Babes" University of Medicine and Pharmacy, Timisoara, Romania
| | - Zoltan Dudas
- Neutron Spectroscopy Department, Institute for Solid State Physics and Optics, Wigner Research Centre for Physics, Hungarian Academy of Sciences, Budapest, Hungary.,Inorganic Department, Institute of Chemistry, Romanian Academy, Timisoara, Romania
| | - Adel Len
- Neutron Spectroscopy Department, Institute for Solid State Physics and Optics, Wigner Research Centre for Physics, Hungarian Academy of Sciences, Budapest, Hungary.,Faculty of Engineering and Information Technology, University of Pécs, Pécs, Hungary
| | - Janos Fuzi
- Neutron Spectroscopy Department, Institute for Solid State Physics and Optics, Wigner Research Centre for Physics, Hungarian Academy of Sciences, Budapest, Hungary.,Faculty of Engineering and Information Technology, University of Pécs, Pécs, Hungary
| | - Florin Borcan
- The 1st Department (Analytical Chemistry), Faculty of Pharmacy, "Victor Babes" University of Medicine and Pharmacy, Timisoara, Romania,
| | - Mirela Cleopatra Tomescu
- The 5th Department (Internal Medicine I), Faculty of Medicine, "Victor Babes" University of Medicine and Pharmacy, Timisoara, Romania
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Shah EV, Kumar V, Sharma BK, Rajput K, Chaudhary VP, Roy DR. Co-Tetraphenylporphyrin (co-TPP) in TM-TPP (TM = Fe, Co, Ni, Cu, and Zn) series: a new optical material under DFT. J Mol Model 2018; 24:239. [PMID: 30120570 DOI: 10.1007/s00894-018-3783-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Accepted: 08/01/2018] [Indexed: 10/28/2022]
Abstract
A detailed investigation of the structure, electronic, spectroscopic, and optical properties of a series of transition metal-doped tetraphenylporphyrins (TM-TPP; TM = Fe, Co, Ni, Cu and Zn) is performed under density functional framework. The structure and stability of tetraphenylporphyrin (TPP) and TM-TPPs are understood with HOMO-LUMO gap, chemical hardness, and binding energies of the transition metals to the compound. Optical properties of TPP and TM-TPP series are assessed with relevant optical absorption spectra. A couple of visible active compounds, viz. Co-TPP and Ni-TPP, are reported for the first time for future opto-electronic applications. To gain insight on the possible synthesis of these compounds, we have analyzed frontier molecular orbitals (FMOs) as well as infra-red spectra. Graphical abstract Optical absorption spectra of TPP and TM-TPPs, and infrared spectra of TPP merged with Co-TPP.
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Abstract
In this review, a brief description of how animal skins were transformed in leathers in Europe using different vegetable tannins will be presented. Special attention will be dedicated to the description of the type of tannins and the characteristics of the most important type of historic leathers thus obtained. The text will also focus on the description of the techniques used in the identification of these tannins in historic objects: colorimetric tests and spectroscopic analysis.
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Affiliation(s)
- Lina Falcão
- Artistic Studies Research Centre, Faculty of Fine Arts, University of Lisbon, Largo da Academia Nacional de Belas-Artes, 1249-058 Lisboa, Portugal.
- Centre of Chemistry and Biochemistry, Department of Chemistry and Biochemistry, Faculty of Sciences, University of Lisbon, Campo Grande, Edifício C-8, 1749-016 Lisboa, Portugal.
| | - Maria Eduarda M Araújo
- Centre of Chemistry and Biochemistry, Department of Chemistry and Biochemistry, Faculty of Sciences, University of Lisbon, Campo Grande, Edifício C-8, 1749-016 Lisboa, Portugal.
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48
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Zainuri DA, Razak IA, Arshad S. The effect of the fused-ring substituent on anthracene chalcones: crystal structural and DFT studies of 1-(anthracen-9-yl)-3-(naphthalen-2-yl)prop-2-en-1-one and 1-(anthracen-9-yl)-3-(pyren-1-yl)prop-2-en-1-one. Acta Crystallogr E Crystallogr Commun 2018; 74:650-655. [PMID: 29850084 PMCID: PMC5947480 DOI: 10.1107/s2056989018005467] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [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: 03/23/2018] [Accepted: 04/09/2018] [Indexed: 11/11/2022]
Abstract
The title chalcone compounds, C27H18O (I) and C33H20O (II), were synthesized using a Claisen-Schmidt condensation. Both compounds display an s-trans configuration of the enone moiety. The crystal structures feature inter-molecular C-H⋯O and C-H⋯π inter-actions. Quantum chemical analysis of density functional theory (DFT) with a B3LYP/6-311++G(d,p) basis set has been employed to study the structural properties of the compound. The effect of the inter-molecular inter-actions in the solid state are responsible for the differences between the experimental and theoretical optimized geometrical parameters. The small HOMO-LUMO energy gap in (I) (exp : 3.18 eV and DFT: 3.15 eV) and (II) (exp : 2.76 eV and DFT: 2.95 eV) indicates the suitability of these compounds for optoelectronic applications. The inter-molecular contacts and weak contributions to the supra-molecular stabilization are analysed using Hirshfeld surface analysis.
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Affiliation(s)
- Dian Alwani Zainuri
- X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia
| | - Ibrahim Abdul Razak
- X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia
| | - Suhana Arshad
- X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia
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Qi L, Liu H, Li J, Li T, Wang Y. Feature Fusion of ICP-AES, UV-Vis and FT-MIR for Origin Traceability of Boletus edulis Mushrooms in Combination with Chemometrics. Sensors (Basel) 2018; 18:E241. [PMID: 29342969 PMCID: PMC5795700 DOI: 10.3390/s18010241] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Revised: 01/08/2018] [Accepted: 01/12/2018] [Indexed: 02/06/2023]
Abstract
Origin traceability is an important step to control the nutritional and pharmacological quality of food products. Boletus edulis mushroom is a well-known food resource in the world. Its nutritional and medicinal properties are drastically varied depending on geographical origins. In this study, three sensor systems (inductively coupled plasma atomic emission spectrophotometer (ICP-AES), ultraviolet-visible (UV-Vis) and Fourier transform mid-infrared spectroscopy (FT-MIR)) were applied for the origin traceability of 192 mushroom samples (caps and stipes) in combination with chemometrics. The difference between cap and stipe was clearly illustrated based on a single sensor technique, respectively. Feature variables from three instruments were used for origin traceability. Two supervised classification methods, partial least square discriminant analysis (FLS-DA) and grid search support vector machine (GS-SVM), were applied to develop mathematical models. Two steps (internal cross-validation and external prediction for unknown samples) were used to evaluate the performance of a classification model. The result is satisfactory with high accuracies ranging from 90.625% to 100%. These models also have an excellent generalization ability with the optimal parameters. Based on the combination of three sensory systems, our study provides a multi-sensory and comprehensive origin traceability of B. edulis mushrooms.
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Affiliation(s)
- Luming Qi
- Institute of Medicinal Plants, Yunnan Academy of Agricultural Sciences, Kunming 650200, China.
- State Key Laboratory Breeding Base of Systematic Research, Development and Utilization of Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China.
| | - Honggao Liu
- College of Agronomy and Biotechnology, Yunnan Agricultural University, Kunming 650201, China.
| | - Jieqing Li
- College of Agronomy and Biotechnology, Yunnan Agricultural University, Kunming 650201, China.
| | - Tao Li
- College of Resources and Environment, Yuxi Normal University, Yuxi 653100, China.
| | - Yuanzhong Wang
- Institute of Medicinal Plants, Yunnan Academy of Agricultural Sciences, Kunming 650200, China.
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Szkudlarek A, Pentak D, Ploch A, Pożycka J, Maciążek-Jurczyk M. In Vitro Investigation of the Interaction of Tolbutamide and Losartan with Human Serum Albumin in Hyperglycemia States. Molecules 2017; 22:molecules22122249. [PMID: 29258218 PMCID: PMC6149683 DOI: 10.3390/molecules22122249] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Revised: 12/09/2017] [Accepted: 12/15/2017] [Indexed: 01/08/2023] Open
Abstract
Serum albumin is exposed to numerous structural modifications which affect its stability and activity. Glycation is one of the processes leading to the loss of the original properties of the albumin and physiological function disorder. In terms of long lasting states of the hyperglycemia, Advanced Glycation End-products (AGEs) are formed. AGEs are responsible for cellular and tissue structure damage that cause the appearance of a number of health consequences and premature aging. The aim of the present study was to analyze the conformational changes of serum albumin by glycation—“fructation”—using multiple spectroscopic techniques, such as absorption (UV-Vis), fluorescence (SFM), circular dichroism (CD) and nuclear magnetic resonance (NMR) spectroscopy and evaluate of possible alteration of binding and competition between tolbutamide (TB, a first-generation sulfonylurea oral hypoglycemic drug) and losartan (LOS, an angiotensin II receptor (AT1) blocker used in hypertension (1st line with a coexisting diabetes)) in binding to non-glycated (HSA) and glycated (gHSAFRC) human serum albumin in high-affinity binding sites. The studies allowed us to indicate the structural alterations of human serum albumin as a result of fructose glycation. Changes in binding parameters, such as association (Ka) or Stern-Volmer (KSV) constants suggest that glycation increases the affinity of TB and LOS towards albumin and affects interactions between them. The process of albumin glycation influences the pharmacokinetics of drugs, thus monitored pharmacotherapy is reasonable in the case of diabetes and hypertension polypharmacy. This information may lead to the development of more effective drug treatments based on personalized medicine for patients with diabetes. Our studies suggest the validity of monitored polypharmacy of diabetes and coexisting diseases.
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Affiliation(s)
- Agnieszka Szkudlarek
- School of Pharmacy with the Division of Laboratory Medicine in Sosnowiec, Chair and Department of Physical Pharmacy, Jagiellońska 4, Medical University of Silesia, 41-200 Sosnowiec, Poland.
| | - Danuta Pentak
- School of Pharmacy with the Division of Laboratory Medicine in Sosnowiec, Chair and Department of Physical Pharmacy, Jagiellońska 4, Medical University of Silesia, 41-200 Sosnowiec, Poland.
| | - Anna Ploch
- School of Pharmacy with the Division of Laboratory Medicine in Sosnowiec, Chair and Department of Physical Pharmacy, Jagiellońska 4, Medical University of Silesia, 41-200 Sosnowiec, Poland.
| | - Jadwiga Pożycka
- School of Pharmacy with the Division of Laboratory Medicine in Sosnowiec, Chair and Department of Physical Pharmacy, Jagiellońska 4, Medical University of Silesia, 41-200 Sosnowiec, Poland.
| | - Małgorzata Maciążek-Jurczyk
- School of Pharmacy with the Division of Laboratory Medicine in Sosnowiec, Chair and Department of Physical Pharmacy, Jagiellońska 4, Medical University of Silesia, 41-200 Sosnowiec, Poland
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