1
|
Arpago F, Dall'Ara A. Modeling of Styl'One Evolution Correction Factors for Multicomponent Mixtures Scaling-up to Roller Compaction. J Pharm Sci 2024:S0022-3549(24)00131-X. [PMID: 38608725 DOI: 10.1016/j.xphs.2024.04.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Revised: 04/03/2024] [Accepted: 04/03/2024] [Indexed: 04/14/2024]
Abstract
Roll compaction (RC) is a cost-effective dry granulation method, widely implemented in the pharmaceutical industry. In early formulation development however, when the material availability is limited, being able to predict the most important parameters in RC, like gap width and specific compaction force (SCF), to obtain a target ribbon solid fraction (SF) would significantly improve the formulation development efficiency as it would avoid the need of performing experiments on the roller compactor itself. However, at the present state of things, experiments on RC mechanical simulators present an overestimation of the target SF, when compared to roller compactor SF values. Although numerous correction approaches have been developed to improve the predictive performance of different mathematical models applied to the simulation experimental results, no study has collected a database wide enough to demonstrate the validity of a correction factor that allows to accurately simulate the compaction behavior of multicomponent mixtures. Here, 25 different formulations at 40 % drug load are compacted at different SCFs, both on a RC mimicking device (Styl'One Evolution) and on an actual roller compactor (Gerteis Mini-Pactor): following a similar approach as Reimer et al. and implementing a simplified version of the Johanson's mathematical model, 4 different correction factors are calculated, depending on how their material properties and pressure dependencies are considered. In conclusion, one correction factor is identified as the optimal trade-off between the SF prediction accuracy on the Gerteis Mini-Pactor and its applicability to a wide range of formulations, as it is independent of the material properties. This finding is particularly relevant when applied to scale-up to this specific roller compactor or early development processes of new formulations that have not been mechanically characterized yet.
Collapse
Affiliation(s)
- Fabia Arpago
- F. Hoffmann-La Roche AG, Dept. PTDC-F Pharmaceutical R&D, Grenzacherstrasse 124, 4070 Basel, Switzerland
| | - Agostino Dall'Ara
- F. Hoffmann-La Roche AG, Dept. PTDC-F Pharmaceutical R&D, Grenzacherstrasse 124, 4070 Basel, Switzerland.
| |
Collapse
|
2
|
Cesar PF, Miranda RBDP, Santos KF, Scherrer SS, Zhang Y. Recent advances in dental zirconia: 15 years of material and processing evolution. Dent Mater 2024:S0109-5641(24)00044-7. [PMID: 38521694 DOI: 10.1016/j.dental.2024.02.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Revised: 02/26/2024] [Accepted: 02/27/2024] [Indexed: 03/25/2024]
Abstract
OBJECTIVES The objective was to discuss the research on zirconia published in the past 15 years to help the dental materials community understand the key properties of the types of zirconia and their clinical applications. METHODS A literature search was performed in May/2023 using Web of Science Core Collection with the term "dental zirconia". The search returned 5102 articles, which were categorized into 31 groups according to the research topic. RESULTS The current approach to improving the translucency of zirconia is to decrease the alumina content while increasing the yttria content. The resulting materials (4Y-, 5Y-, and above 5 mol% PSZs) may contain more than 50% of cubic phase, with a decrease in mechanical properties. The market trend for zirconia is the production of CAD/CAM disks containing more fracture resistant 3Y-TZP at the bottom layers and more translucent 5Y-PSZ at the top. Although flaws located between layers in multilayered blocks might represent a problem, newer generations of zirconia layered blocks appear to have solved this problem with novel powder compaction technology. Significant advancements in zirconia processing technologies have been made, but there is still plenty of room for improvement, especially in the fields of high-speed sintering and additive manufacturing. SIGNIFICANCE The wide range of zirconia materials currently available in the market may cause confusion in materials selection. It is therefore imperative for dental clinicians and laboratory technicians to get the needed knowledge on zirconia material science, to follow manufacturers' instructions, and to optimize the design of the prosthetic restoration with a good understanding where to reinforce the structure with a tough and strong zirconia.
Collapse
Affiliation(s)
- Paulo Francisco Cesar
- Department of Biomaterials and Oral Biology, School of Dentistry, University of São Paulo, São Paulo, Brazil.
| | | | - Karina Felix Santos
- Department of Biomaterials and Oral Biology, School of Dentistry, University of São Paulo, São Paulo, Brazil
| | - Susanne S Scherrer
- Division of Fixed Prosthodontics and Biomaterials, University Clinics of Dental Medicine, University of Geneva, Geneva, Switzerland
| | - Yu Zhang
- Department of Preventive and Restorative Sciences, School of Dental Medicine, University of Pennsylvania, Philadelphia, USA
| |
Collapse
|
3
|
Martínez-Acevedo L, Job Galindo-Pérez M, Vidal-Romero G, Del Real A, de la Luz Zambrano-Zaragoza M, Quintanar-Guerrero D. Effect of magnesium stearate solid lipid nanoparticles as a lubricant on the properties of tablets by direct compression. Eur J Pharm Biopharm 2023; 193:262-273. [PMID: 37944711 DOI: 10.1016/j.ejpb.2023.11.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2023] [Revised: 10/15/2023] [Accepted: 11/05/2023] [Indexed: 11/12/2023]
Abstract
This study discusses the lubricant properties of magnesium stearate solid lipid nanoparticles (MgSt-SLN) and their effect on the tabletability, mechanical properties, disintegration, and acetaminophen-model dissolution time of microcrystalline cellulose (MCC) tablets prepared by direct compression. The behavior of MgSt-SLN was compared to reference material (RM) to identify advantages and drawbacks. The nanoprecipitation/ion exchange method was employed to prepare the MgSt-SLN. Particle size, zeta potential, specific surface area, morphology, and true density were measured to characterize the nanosystem. The MgSt-SLN particle sizes obtained were 240 ± 5 nm with a specific surface area of 12.2 m2/g. The MCC tablets with MgSt-SLN presented a reduction greater than 20 % in their ejection force, good tabletability, higher tensile strength, lower disintegration delay, and marked differences in acetaminophen dissolution when compared to the RM. The reduced particle size of the magnesium stearate seems to offer a promising technological advantage as an efficient lubricant process that does not affect the properties of tablets.
Collapse
Affiliation(s)
- Lizbeth Martínez-Acevedo
- Laboratorio de Investigación y Posgrado en Tecnología Farmacéutica, Facultad de Estudios Superiores Cuautitlán, Universidad Nacional Autónoma de México, Cuautitlán Izcalli, Estado de México C.P. 54740, Mexico; Laboratorio de Desarrollo Galénico, Departamento de Sistemas Biológicos, Universidad Autónoma Metropolitana-Xochimilco, Cuidad de México C.P. 04960, Mexico
| | - Moises Job Galindo-Pérez
- Departamento de Tecnología Farmacéutica, Facultad de Estudios Superiores Zaragoza, Campus II, Universidad Nacional Autónoma de México, Ciudad de México C.P. 09230, Mexico; Departamento de Procesos y Tecnología, Universidad Autónoma Metropolitana-Cuajimalpa, Ciudad de México C.P. 05348, Mexico
| | - Gustavo Vidal-Romero
- Laboratorio de Investigación y Posgrado en Tecnología Farmacéutica, Facultad de Estudios Superiores Cuautitlán, Universidad Nacional Autónoma de México, Cuautitlán Izcalli, Estado de México C.P. 54740, Mexico; Departamento de Tecnología Farmacéutica, Facultad de Estudios Superiores Zaragoza, Campus II, Universidad Nacional Autónoma de México, Ciudad de México C.P. 09230, Mexico
| | - Alicia Del Real
- Departamento de Ingeniería Molecular de Materiales, Centro de Física Aplicada y Tecnología Avanzada, Universidad Nacional Autónoma de México, Campus Juriquilla, Santiago de Querétaro, Querétaro C.P. 76230, México
| | - María de la Luz Zambrano-Zaragoza
- Laboratorio de Procesos de Transformación y Tecnologías Emergentes de Alimentos, Facultad de Estudios Superiores Cuautitlán, Universidad Nacional Autónoma de México, Cuautitlán Izcalli, Estado de México C.P. 54714, México
| | - David Quintanar-Guerrero
- Laboratorio de Investigación y Posgrado en Tecnología Farmacéutica, Facultad de Estudios Superiores Cuautitlán, Universidad Nacional Autónoma de México, Cuautitlán Izcalli, Estado de México C.P. 54740, Mexico.
| |
Collapse
|
4
|
Al-Shelkamy SA, Vega-Carrillo HR, Xie Z, El-Hossary FM, Mosa ES, Mahdy AA, Elkady O, Ghafaar MA, M AAL. Mechanical and radiation shielding characterization of W-based alloys for advanced nuclear unit. Appl Radiat Isot 2023; 201:110995. [PMID: 37634389 DOI: 10.1016/j.apradiso.2023.110995] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 07/01/2023] [Accepted: 08/18/2023] [Indexed: 08/29/2023]
Abstract
The paper aims to investigate the mechanical and radiation shielding properties of two tungsten-based alloys manufactured by powder technology; their features when compared with two standard stainless steel grades for advanced nuclear applications. Multiple measurements were performed to characterize the alloys' structural and mechanical properties. XRD analysis and average surface roughness measurements showed the crystalline and morphological structure of the alloys. Surface microhardness added to the abrasive wear analysis showed the final wear resistance of the selected alloys. In addition, the shielding features against gamma and fast neutrons radiation were calculated. The superior characteristics of W-based alloys manufactured by powder technology make them suitable to be used in advanced nuclear power units.
Collapse
Affiliation(s)
- Samah A Al-Shelkamy
- Department of Physics, Faculty of Science, New Valley University, P.O. Box: 72511, New Valley, Egypt.
| | - Hector Rene Vega-Carrillo
- Unidad Académica de Estudios Nucleares, Universidad Autonoma de Zacatecas, Ciprés 10, Fracc. La Peñuela, 98060, Zacatecas, Zac, Mexico
| | - Zhongliang Xie
- Department of Engineering Mechanics, Northwestern Polytechnical University, Xi'an, 710072, China
| | - F M El-Hossary
- Physics Department, Faculty of Science, Sohag University, P.O. Box: 82524, Sohag, Egypt
| | - E S Mosa
- Department of Mining and Metallurgical Engineering, Faculty of Engineering, AlAzharUniversity, Cairo, Egypt
| | - Amir A Mahdy
- Department of Mining and Metallurgical Engineering, Faculty of Engineering, AlAzharUniversity, Cairo, Egypt
| | - Omayma Elkady
- Powder Technology Division, Manufacturing Technology Department, (CMRDI), Helwan, Egypt
| | - M Abdel Ghafaar
- Manufacturing Engineering and Production Technology Department,Modern Academy for Engineering and Technology, Cairo, P.O.Box:112571, Egypt
| | - A Abdel-Latif M
- Department of Physics, Faculty of Engineering, FayoumUniversity, P.O.Box: 63514, Fayoum, Egypt
| |
Collapse
|
5
|
Lagare RB, Huang YS, Bush COJ, Young KL, Rosario ACA, Gonzalez M, Mort P, Nagy ZK, Reklaitis GV. Developing a Virtual Flowability Sensor for Monitoring a Pharmaceutical Dry Granulation Line. J Pharm Sci 2023; 112:1427-1439. [PMID: 36649791 DOI: 10.1016/j.xphs.2023.01.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2022] [Revised: 01/10/2023] [Accepted: 01/10/2023] [Indexed: 01/15/2023]
Abstract
Current technologies to measure granule flowability involve at-line methods that can take hours to perform. This is problematic for a continuous dry granulation tableting line, where the quality assurance and control of the final tablet products depend on real-time monitoring and control of powder flowability. Hence, a real-time alternative is needed for measuring the flowability of the granular products coming out of the roller compactor, which is the unit operation immediately preceding the tablet press. Since particle analyzers have the potential to take inline measurements of the size and shape of granules, they can potentially serve as real-time flowability sensors, given that the size and shape measurements can be used to reliably predict flowability measurements. This paper reports on the use of Partial Least Squares (PLS) regression to utilize distributions of size and shape measurements in predicting the output of three different types of flowability measurements: rotary drum flow, orifice flow, and tapped density analysis. The prediction performance of PLS had a coefficient of determination ranging from 0.80 to 0.97, which is the best reported performance in the literature. This is attributed to the ability of PLS to handle high collinearity in the datasets and the inclusion of multiple shape characteristics-eccentricity, form factor, and elliptical form factor-into the model. The latter calls for a change in industry perspective, which normally dismisses the importance of shape in favor of size; and the former suggests the use of PLS as a better way to reduce the dimensionality of distribution datasets, instead of the widely used practice of pre-selecting distribution percentiles.
Collapse
Affiliation(s)
- Rexonni B Lagare
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN 47907, USA.
| | - Yan-Shu Huang
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN 47907, USA
| | - Craig Oh-Joong Bush
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN 47907, USA
| | - Katherine Leigh Young
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN 47907, USA
| | | | - Marcial Gonzalez
- School of Mechanical Engineering, Purdue University, West Lafayette, IN 47907, USA
| | - Paul Mort
- School of Materials Engineering, Purdue University, West Lafayette, IN 47907, USA
| | - Zoltan K Nagy
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN 47907, USA
| | - Gintaras V Reklaitis
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN 47907, USA
| |
Collapse
|
6
|
Huang YS, Medina-González S, Straiton B, Keller J, Marashdeh Q, Gonzalez M, Nagy Z, Reklaitis GV. Real-Time Monitoring of Powder Mass Flowrates for Plant-Wide Control of a Continuous Direct Compaction Tablet Manufacturing Process. J Pharm Sci 2022; 111:69-81. [PMID: 34126119 PMCID: PMC10009918 DOI: 10.1016/j.xphs.2021.06.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Revised: 06/02/2021] [Accepted: 06/02/2021] [Indexed: 11/28/2022]
Abstract
While measurement and monitoring of powder/particulate mass flow rate are not essential to the execution of traditional batch pharmaceutical tablet manufacturing, in continuous operation, it is an important additional critical process parameter. It has a key role both in establishing that the process is in a state of control, and as a controlled variable in process control system design. In current continuous tableting line operations, the pharmaceutical community relies on loss-in-weight feeders to monitor and understand upstream powder flow dynamics. However, due to the absence of established sensing technologies for measuring particulate flow rates, the downstream flow of the feeders is monitored and controlled using various indirect strategies. For example, the hopper level of the tablet press is maintained as a controlled process output by adjusting the turret speed of the tablet press, which indirectly controlling the flow rate. This gap in monitoring and control of the critical process flow motivates our investigation of a novel PAT tool, a capacitance-based sensor (ECVT), and its effective integration into the plant-wide control of a direct compaction process. First, the results of stand-alone experimental studies are reported, which confirm that the ECVT sensor can provide real-time measurements of mass flow rate with measurement error within -1.8 ~ 3.3% and with RMSE of 0.1 kg/h over the range of flow rates from 2 to 10 kg/h. The key caveat is that the powder flowability has to be good enough to avoid powder fouling on the transfer line walls. Next, simulation case studies are carried out using a dynamic flowsheet model of a continuous direct compression line implemented in Matlab/Simulink to demonstrate the potential structural and performance advantages in plant-wide process control enabled by mass flow sensing. Finally, experimental studies are performed on a direct compaction pilot plant in which the ECVT sensor is located at the exit of the blender, to confirm that the powder flow can be monitored instantaneously and controlled effectively at the specified setpoint within a plant-wide feedback controller system.
Collapse
Affiliation(s)
- Yan-Shu Huang
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN 47907, United States.
| | - Sergio Medina-González
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN 47907, United States
| | | | | | | | - Marcial Gonzalez
- School of Mechanical Engineering, Purdue University, West Lafayette, IN 47907, United States
| | - Zoltan Nagy
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN 47907, United States
| | - Gintaras V Reklaitis
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN 47907, United States
| |
Collapse
|
7
|
Toson P, Doshi P, Matic M, Siegmann E, Blackwood D, Jain A, Brandon J, Lee K, Wilsdon D, Kimber J, Verrier H, Khinast J, Jajcevic D. Continuous mixing technology: Validation of a DEM model. Int J Pharm 2021; 608:121065. [PMID: 34481005 DOI: 10.1016/j.ijpharm.2021.121065] [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: 06/24/2021] [Revised: 08/18/2021] [Accepted: 08/29/2021] [Indexed: 10/20/2022]
Abstract
Continuous powder mixing is an important technology used in the development and manufacturing of solid oral dosage forms. Since critical quality attributes of the final product greatly depend on the performance of the mixing step, an analysis of such a process using the Discrete Element Method (DEM) is of crucial importance. On one hand, the number of expensive experimental runs can be reduced dramatically. On the other hand, numerical simulations can provide information that is very difficult to obtain experimentally. In order to apply such a simulation technology in product development and to replace experimental runs, an intensive model validation step is required. This paper presents a DEM model of the vertical continuous mixing device termed CMT (continuous mixing technology) and an extensive validation workflow. First, a cohesive contact model was calibrated in two small-scale characterization experiments: a compression test with spring-back and a shear cell test. An improved, quicker calibration procedure utilizing the previously calibrated contact models is presented. The calibration procedure is able to differentiate between the blend properties caused by different API particle sizes in the same formulation. Second, DEM simulations of the CMT were carried out to determine the residence time distribution (RTD) of the material inside the mixer. After that, the predicted RTDs were compared with the results of tracer spike experiments conducted with two blend material properties at two mass throughputs of 15 kg/h and 30 kg/h. Additionally, three hold-up masses (500, 730 and 850 g) and three impeller speeds (400, 440 and 650 rpms) were considered. Finally, both RTD datasets from DEM and tracer experiments were used to predict the damping behavior of incoming feeder fluctuations and the funnel of maximum duration and magnitude of incoming deviations that do not require a control action. The results for both tools in terms of enabling a control strategy (the fluctuation damping and the funnel plot) are in excellent agreement, indicating that DEM simulations are well suited to replace process-scale tracer spike experiments to determine the RTD.
Collapse
Affiliation(s)
- Peter Toson
- Research Center Pharmaceutical Engineering, Inffeldgasse 13, 8010 Graz, Austria
| | - Pankaj Doshi
- Worldwide Research and Development, Pfizer Inc., Groton, CT, USA.
| | - Marko Matic
- Research Center Pharmaceutical Engineering, Inffeldgasse 13, 8010 Graz, Austria
| | - Eva Siegmann
- Research Center Pharmaceutical Engineering, Inffeldgasse 13, 8010 Graz, Austria
| | - Daniel Blackwood
- Worldwide Research and Development, Pfizer Inc., Groton, CT, USA
| | - Ashwinkumar Jain
- Worldwide Research and Development, Pfizer Inc., Groton, CT, USA
| | - Jenna Brandon
- Worldwide Research and Development, Pfizer Inc., Groton, CT, USA
| | - Kai Lee
- Worldwide Research and Development, Pfizer Inc., Sandwich, Kent, United Kingdom
| | - David Wilsdon
- Worldwide Research and Development, Pfizer Inc., Sandwich, Kent, United Kingdom
| | - James Kimber
- Worldwide Research and Development, Pfizer Inc., Sandwich, Kent, United Kingdom
| | - Hugh Verrier
- Worldwide Research and Development, Pfizer Inc., Sandwich, Kent, United Kingdom
| | - Johannes Khinast
- Research Center Pharmaceutical Engineering, Inffeldgasse 13, 8010 Graz, Austria; Institute of Process and Particle Engineering, Graz University of Technology, Inffeldgasse 13, 8010 Graz, Austria
| | - Dalibor Jajcevic
- Research Center Pharmaceutical Engineering, Inffeldgasse 13, 8010 Graz, Austria.
| |
Collapse
|
8
|
Torikai Y, Sasaki Y, Sasaki K, Kyuno A, Haruta S, Tanimoto A. Evaluation of Systemic and Mucosal Immune Responses Induced by a Nasal Powder Delivery System in Conjunction with an OVA Antigen in Cynomolgus Monkeys. J Pharm Sci 2020; 110:2038-2046. [PMID: 33278410 PMCID: PMC7836740 DOI: 10.1016/j.xphs.2020.11.023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [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: 09/08/2020] [Revised: 11/20/2020] [Accepted: 11/20/2020] [Indexed: 11/17/2022]
Abstract
An immune response for a nasal ovalbumin (OVA) powder formulation with an applied nasal delivery platform technology, consisting of a powdery nasal carrier and a device, was evaluated in monkeys with similar upper respiratory tracts and immune systems to those of humans, in order to assess the applicability to a vaccine antigen. Nasal distribution and retention studies using a 3D nasal cavity model and manganese-enhanced MRI were conducted by administering nasal dye and manganese powder formulations with the applied technology. Systemic and mucosal immune responses for the nasal OVA powder formulation were evaluated by determining serum IgG and nasal wash IgA antibody titers. The nasal dye and manganese powder formulations showed wider distribution and longer retention time than did a nasal liquid formulation. The nasal OVA powder formulation also showed comparable and higher antigen-specific IgG antibody titer to an injection and nasal liquid formulation, respectively. Furthermore, antigen-specific IgA antibody response was detected only for the nasal OVA powder formulation. The present study suggests that the technology, originally designed for drug absorption, is promising for nasal vaccines, enabling both a mucosal immunity response as the first line of defense and systemic immunity response as a second line of defense against infection.
Collapse
Affiliation(s)
- Yusuke Torikai
- Department of Molecular and Cellular Pathology, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima, 850-8544, Japan; R&D Department, TR Company, Shin Nippon Biomedical Laboratories, Ltd., 2438 Miyanoura, Kagoshima, 891-1394, Japan.
| | - Yuji Sasaki
- Department of Pathology, Drug and Safety Research Laboratories, Shin Nippon Biomedical Laboratories, Ltd., 2438 Miyanoura, Kagoshima, 891-1394, Japan
| | - Keita Sasaki
- R&D Department, TR Company, Shin Nippon Biomedical Laboratories, Ltd., 2438 Miyanoura, Kagoshima, 891-1394, Japan
| | - Akifumi Kyuno
- R&D Department, TR Company, Shin Nippon Biomedical Laboratories, Ltd., 2438 Miyanoura, Kagoshima, 891-1394, Japan
| | - Shunji Haruta
- R&D Department, TR Company, Shin Nippon Biomedical Laboratories, Ltd., 2438 Miyanoura, Kagoshima, 891-1394, Japan
| | - Akihide Tanimoto
- Department of Molecular and Cellular Pathology, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima, 850-8544, Japan
| |
Collapse
|
9
|
Haneef M, Yaqoob K, Adeel Umer M, Hussain Z. A novel strategy for synthesis of Al powder comprising of Al nanoflakes via ultrasonication of Al foil. Ultrason Sonochem 2020; 61:104838. [PMID: 31710996 DOI: 10.1016/j.ultsonch.2019.104838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2019] [Revised: 10/19/2019] [Accepted: 10/21/2019] [Indexed: 06/10/2023]
Abstract
Aluminum (Al) nanopowders have potential applications as hydrogen storage medium, energetic materials, pigments, and for production of metal matrix parts via powder metallurgy, to name a few. They are synthesized by methods which are either expensive or result in the product with impurities. A novel methodology based on ultrasonication of commercially available Al foil has been developed for synthesis of Al powders. Al foil was immersed in an organic medium and subjected to ultrasonication in a 160-watt bath ultrasonicator operated at 35 kHz frequency. Morphological, crystal structural, and dimensional characterization of ultrasonicated Al was carried out with the help of scanning electron microscopy (SEM), X-ray diffraction (XRD), and atomic forces microscopy (AFM) respectively. Characterization results revealed that Al foil was eroded laterally as well as axially, resulting in the formation of micro and nanosized flake-like pure Al powder.
Collapse
Affiliation(s)
- Mobeen Haneef
- School of Chemical and Materials Engineering (SCME), National University of Sciences and Technology (NUST), Sector H-12, Islamabad 44000, Pakistan
| | - Khurram Yaqoob
- School of Chemical and Materials Engineering (SCME), National University of Sciences and Technology (NUST), Sector H-12, Islamabad 44000, Pakistan.
| | - M Adeel Umer
- School of Chemical and Materials Engineering (SCME), National University of Sciences and Technology (NUST), Sector H-12, Islamabad 44000, Pakistan
| | - Zakir Hussain
- School of Chemical and Materials Engineering (SCME), National University of Sciences and Technology (NUST), Sector H-12, Islamabad 44000, Pakistan
| |
Collapse
|
10
|
Alvarado-Hernández BB, Sierra-Vega NO, Martínez-Cartagena P, Hormaza M, Méndez R, Romañach RJ. A sampling system for flowing powders based on the theory of sampling. Int J Pharm 2019; 574:118874. [PMID: 31837408 DOI: 10.1016/j.ijpharm.2019.118874] [Citation(s) in RCA: 5] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Revised: 11/10/2019] [Accepted: 11/12/2019] [Indexed: 12/16/2022]
Abstract
An innovative chute and stream sampler system for flowing powders has been developed and tested. The system is designed for representative sampling based on the principles of the Theory of Sampling (TOS). The sampling system was used in combination with near infrared (NIR) spectroscopy to determine the drug concentration of flowing powders. The system is comprised of three parts: a chute, a stream sampler and a sample collection port. The NIR spectra were obtained at the chute, before entering the sampler, and as the powder flowed through the stream sampler. Samples were also collected from the sample collection port to be analyzed using an ultraviolet-visible (UV-Vis) reference method to determine drug content. A total of eight pharmaceutical powder blends, ranging in concentration from 10.5(%w/w) to 19.5(%w/w) of caffeine, were used to test the sampling system. Materials were characterized before blends were made to provide information on flow properties. The throughput of the system was between 30 and 35 kg/h based on the flow properties of the blend. Drug concentration was effectively determined at the chute and stream sampler. The NIR calibration models showed low root mean squared errors of prediction, 0.65(%w/w) and 0.51(%w/w), for the chute and stream sampler respectively. The NIR calibration models also showed low bias values -0.36(%w/w) at the chute and 0.057(%w/w) at the stream sampler. Significant agreement was obtained between the results from the nondestructive NIR versus the destructive UV-Vis method. Variographic analysis was performed to estimate the analytical and sampling errors when determining the drug concentration at the chute and stream sampler respectively. The variographic analysis showed low analytical errors, 0.103(%w/w)2 and 0.181(%w/w)2 at the chute and stream sampler respectively. The analysis also showed that the minimum practical error (MPE) was around 0.2(%w/w)2 at both chute and stream sampler.
Collapse
Affiliation(s)
| | - Nobel O Sierra-Vega
- Department of Chemical Engineering, University of Puerto Rico at Mayaguez, Puerto Rico
| | - Pedro Martínez-Cartagena
- Department of Chemistry, University of Puerto Rico at Mayaguez, Call Box 9000, Mayaguez 00680, Puerto Rico
| | - Manuel Hormaza
- IBS Caribe INC., P.O. Box 8849, San Juan PR 00910, Puerto Rico
| | - Rafael Méndez
- Department of Chemical Engineering, University of Puerto Rico at Mayaguez, Puerto Rico
| | - Rodolfo J Romañach
- Department of Chemistry, University of Puerto Rico at Mayaguez, Call Box 9000, Mayaguez 00680, Puerto Rico.
| |
Collapse
|
11
|
Oliveira DM, Clemente E, da Costa JM. Hygroscopic behavior and degree of caking of grugru palm (Acrocomia aculeata) powder. J Food Sci Technol 2014; 51:2783-9. [PMID: 25328226 DOI: 10.1007/s13197-012-0814-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 07/24/2012] [Accepted: 08/13/2012] [Indexed: 10/27/2022]
Abstract
This work aims to investigate the hygroscopic behavior of grugru palm powder through adsorption isotherms and its degree of caking. The powders of grugru palm (T1 - without maltodextrin, T2 - with 8 % of maltodextrin) were obtained by oven drying at 65 °C for 25 h. The experimental data was obtained through static gravimetric method at temperatures of 25, 30, 35 and 40 °C with different saturated salt solutions. The models of GAB, BET, Henderson, and Oswin were fitted to experimental data. The values of hygroscopicity were 6.39 and 5.17 % and degrees of caking were 3.11 and 0.03 % for T1 and T2, respectively. The adsorption isotherms from mathematical models can be classified as Type III. The GAB and Oswin models were the best representing the behavior of the powder isotherms, T1 and T2, respectively. The grugru palm powder proved to be non-hygroscopic and non-agglomerating. The T2 with 8 % of maltodextrin presented the lowest hygroscopicity.
Collapse
|