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Cisternino S, De Dominicis L, Mou L, Esposito J, Gennari C, Calliari I, Pupillo G. Cryomilling of Isotope-Enriched Ti Powders for HIVIPP Deposition to Manufacture Targets for Nuclear Cross Section Measurement. Materials (Basel) 2023; 16:ma16113926. [PMID: 37297060 DOI: 10.3390/ma16113926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Revised: 05/19/2023] [Accepted: 05/22/2023] [Indexed: 06/12/2023]
Abstract
The realization of isotopically enriched Ti targets for nuclear cross-section measurements requires particular attention, from the starting material preparation up to the deposition technique. In this work, a cryomilling process was developed and optimized, aimed at reducing the size of 49,50Ti metal sponge as provided by the supplier (size up to 3 mm), to the optimal size of 10 µm, to fit the High Energy Vibrational Powder Plating technique used for target manufacturing. The optimization of the cryomilling protocol and the HIVIPP deposition using natTi material was thus performed. The scarce amount of the enriched material to be treated (about 150 mg), the need to obtain a non-contaminated final powder and a uniform target thickness of about 500 µg/cm2 were taken into account. The 49,50Ti materials were then processed and 20 targets of each isotope were manufactured. Both powders and the final Ti targets produced were characterized by SEM-EDS analysis. The amount of Ti deposited was measured by weighing, indicating reproducible and homogeneous targets, with an areal density of 468 ± 110 µg/cm2 for 49Ti (n = 20) and 638 ± 200 µg/cm2 for 50Ti (n = 20). The uniformity of the deposited layer was also confirmed by the metallurgical interface analysis. The final targets were used for the cross section measurements of the 49Ti(p,x)47Sc and 50Ti(p,x)47Sc nuclear reaction routes aimed at the production of the theranostic radionuclide 47Sc.
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Affiliation(s)
- Sara Cisternino
- Legnaro National Laboratories, National Institute for Nuclear Physics (INFN-LNL), 35020 Legnaro, Italy
- Department of Industrial Engineering, University of Padova, 35131 Padova, Italy
| | - Lucia De Dominicis
- Legnaro National Laboratories, National Institute for Nuclear Physics (INFN-LNL), 35020 Legnaro, Italy
- Department of Physics and Astronomy, University of Padova, 35131 Padova, Italy
| | - Liliana Mou
- Legnaro National Laboratories, National Institute for Nuclear Physics (INFN-LNL), 35020 Legnaro, Italy
| | - Juan Esposito
- Legnaro National Laboratories, National Institute for Nuclear Physics (INFN-LNL), 35020 Legnaro, Italy
| | - Claudio Gennari
- Department of Industrial Engineering, University of Padova, 35131 Padova, Italy
| | - Irene Calliari
- Department of Industrial Engineering, University of Padova, 35131 Padova, Italy
| | - Gaia Pupillo
- Legnaro National Laboratories, National Institute for Nuclear Physics (INFN-LNL), 35020 Legnaro, Italy
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2
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Moreira CMDN, Kelemen CD, Obado SO, Zahedifard F, Zhang N, Holetz FB, Gauglitz L, Dallagiovanna B, Field MC, Kramer S, Zoltner M. Impact of inherent biases built into proteomic techniques: Proximity labeling and affinity capture compared. J Biol Chem 2023; 299:102726. [PMID: 36410438 DOI: 10.1016/j.jbc.2022.102726] [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: 08/16/2022] [Revised: 10/26/2022] [Accepted: 11/14/2022] [Indexed: 11/20/2022] Open
Abstract
The characterization of protein-protein interactions (PPIs) is of high value for understanding protein function. Two strategies are popular for identification of PPIs direct from the cellular environment: affinity capture (pulldown) isolates the protein of interest with an immobilized matrix that specifically captures the target and potential partners, whereas in BioID, genetic fusion of biotin ligase facilitates proximity biotinylation, and labeled proteins are isolated with streptavidin. Whilst both methods provide valuable insights, they can reveal distinct PPIs, but the basis for these differences is less obvious. Here, we compare both methods using four different trypanosome proteins as baits: poly(A)-binding proteins PABP1 and PABP2, mRNA export receptor MEX67, and the nucleoporin NUP158. With BioID, we found that the population of candidate interacting proteins decreases with more confined bait protein localization, but the candidate population is less variable with affinity capture. BioID returned more likely false positives, in particular for proteins with less confined localization, and identified low molecular weight proteins less efficiently. Surprisingly, BioID for MEX67 identified exclusively proteins lining the inner channel of the nuclear pore complex (NPC), consistent with the function of MEX67, whereas the entire NPC was isolated by pulldown. Similarly, for NUP158, BioID returned surprisingly few PPIs within NPC outer rings that were by contrast detected with pulldown but instead returned a larger cohort of nuclear proteins. These rather significant differences highlight a clear issue with reliance on a single method to identify PPIs and suggest that BioID and affinity capture are complementary rather than alternative approaches.
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3
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Kushwaha AK, Misra M, Menezes PL. Manufacturing Bulk Nanocrystalline Al-3Mg Components Using Cryomilling and Spark Plasma Sintering. Nanomaterials (Basel) 2022; 12:3618. [PMID: 36296808 PMCID: PMC9607134 DOI: 10.3390/nano12203618] [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: 09/01/2022] [Revised: 10/13/2022] [Accepted: 10/14/2022] [Indexed: 06/16/2023]
Abstract
In the current study, pure aluminum (Al) powders were cryomilled with and without 3 wt.% pure magnesium (Mg) dopant for varying durations followed by spark plasma sintering (SPS) of powders to prepare bulk components with superior mechanical properties. The crystallite sizes were determined for powders and the bulk components by analyzing the X-ray diffraction (XRD) spectrum. The calculations indicated a reduction in crystallite size with the increase in the cryomilling duration. The results also showed a more significant decrease in the crystallite sizes for Al-3Mg samples than that of pure Al. The changes in the surface morphology of powders were characterized using scanning electron microscopy (SEM). The elemental mapping analysis at nanoscale was carried out using Energy-dispersive X-ray spectroscopy (EDX) in Scanning transmission electron microscopy (STEM). The mechanical properties of the bulk components were assessed using a Vickers Microhardness tester. The test results demonstrated an improvement in the hardness of Mg-doped components. Higher hardness values were also reported with an increase in the cryomilling duration. This article discusses the mechanisms for the reduction in crystallite size for pure Al and Al-3Mg and its subsequent impact on improving mechanical properties.
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Affiliation(s)
| | - Manoranjan Misra
- Department of Chemical and Materials Engineering, University of Nevada, Reno, NV 89557, USA
| | - Pradeep L. Menezes
- Department of Mechanical Engineering, University of Nevada, Reno, NV 89557, USA
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4
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Ribeiro JS, Münchow EA, Bordini EAF, Rodrigues NS, Dubey N, Sasaki H, Fenno JC, Schwendeman S, Bottino MC. Engineering of Injectable Antibiotic-laden Fibrous Microparticles Gelatin Methacryloyl Hydrogel for Endodontic Infection Ablation. Int J Mol Sci 2022; 23:ijms23020971. [PMID: 35055155 PMCID: PMC8778034 DOI: 10.3390/ijms23020971] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [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: 12/21/2021] [Revised: 01/13/2022] [Accepted: 01/14/2022] [Indexed: 12/14/2022] Open
Abstract
This study aimed at engineering cytocompatible and injectable antibiotic-laden fibrous microparticles gelatin methacryloyl (GelMA) hydrogels for endodontic infection ablation. Clindamycin (CLIN) or metronidazole (MET) was added to a polymer solution and electrospun into fibrous mats, which were processed via cryomilling to obtain CLIN- or MET-laden fibrous microparticles. Then, GelMA was modified with CLIN- or MET-laden microparticles or by using equal amounts of each set of fibrous microparticles. Morphological characterization of electrospun fibers and cryomilled particles was performed via scanning electron microscopy (SEM). The experimental hydrogels were further examined for swelling, degradation, and toxicity to dental stem cells, as well as antimicrobial action against endodontic pathogens (agar diffusion) and biofilm inhibition, evaluated both quantitatively (CFU/mL) and qualitatively via confocal laser scanning microscopy (CLSM) and SEM. Data were analyzed using ANOVA and Tukey's test (α = 0.05). The modification of GelMA with antibiotic-laden fibrous microparticles increased the hydrogel swelling ratio and degradation rate. Cell viability was slightly reduced, although without any significant toxicity (cell viability > 50%). All hydrogels containing antibiotic-laden fibrous microparticles displayed antibiofilm effects, with the dentin substrate showing nearly complete elimination of viable bacteria. Altogether, our findings suggest that the engineered injectable antibiotic-laden fibrous microparticles hydrogels hold clinical prospects for endodontic infection ablation.
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Affiliation(s)
- Juliana S. Ribeiro
- Department of Cariology, Restorative Sciences, and Endodontics, School of Dentistry, University of Michigan, Ann Arbor, MI 48104, USA; (J.S.R.); (E.A.F.B.); (N.S.R.); (N.D.); (H.S.)
- Department of Restorative Dentistry, School of Dentistry, Federal University of Pelotas, Pelotas 96015-560, Rio Grande do Sul, Brazil
| | - Eliseu A. Münchow
- Department of Conservative Dentistry, School of Dentistry, Federal University of Rio Grande do Sul, Porto Alegre 90035-003, Rio Grande do Sul, Brazil;
| | - Ester A. F. Bordini
- Department of Cariology, Restorative Sciences, and Endodontics, School of Dentistry, University of Michigan, Ann Arbor, MI 48104, USA; (J.S.R.); (E.A.F.B.); (N.S.R.); (N.D.); (H.S.)
- Department of Dental Materials and Prosthodontics, School of Dentistry, São Paulo State University, Araraquara 14801, São Paulo, Brazil
| | - Nathalie S. Rodrigues
- Department of Cariology, Restorative Sciences, and Endodontics, School of Dentistry, University of Michigan, Ann Arbor, MI 48104, USA; (J.S.R.); (E.A.F.B.); (N.S.R.); (N.D.); (H.S.)
| | - Nileshkumar Dubey
- Department of Cariology, Restorative Sciences, and Endodontics, School of Dentistry, University of Michigan, Ann Arbor, MI 48104, USA; (J.S.R.); (E.A.F.B.); (N.S.R.); (N.D.); (H.S.)
| | - Hajime Sasaki
- Department of Cariology, Restorative Sciences, and Endodontics, School of Dentistry, University of Michigan, Ann Arbor, MI 48104, USA; (J.S.R.); (E.A.F.B.); (N.S.R.); (N.D.); (H.S.)
| | - John C. Fenno
- Department of Biologic and Materials Sciences & Prosthodontics, University of Michigan School of Dentistry, Ann Arbor, MI 48104, USA;
| | - Steven Schwendeman
- Department of Pharmaceutical Sciences and the Biointerfaces Institute, University of Michigan, Ann Arbor, MI 48104, USA;
| | - Marco C. Bottino
- Department of Cariology, Restorative Sciences, and Endodontics, School of Dentistry, University of Michigan, Ann Arbor, MI 48104, USA; (J.S.R.); (E.A.F.B.); (N.S.R.); (N.D.); (H.S.)
- Department of Biomedical Engineering, College of Engineering, University of Michigan, Ann Arbor, MI 48104, USA
- Correspondence: ; Tel.: +1-734-763-2206; Fax: +1-734-936-1597
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Minecka A, Chmiel K, Jurkiewicz K, Hachuła B, Łunio R, Żakowiecki D, Hyla K, Milanowski B, Koperwas K, Kamiński K, Paluch M, Kamińska E. Studies on the Vitrified and Cryomilled Bosentan. Mol Pharm 2022; 19:80-90. [PMID: 34851124 PMCID: PMC8728735 DOI: 10.1021/acs.molpharmaceut.1c00613] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
![]()
In this paper, several
experimental techniques [X-ray diffraction,
differential scanning calorimetry (DSC), thermogravimetry, Fourier
transform infrared spectroscopy, and broad-band dielectric spectroscopy]
have been applied to characterize the structural and thermal properties,
H-bonding pattern, and molecular dynamics of amorphous bosentan (BOS)
obtained by vitrification and cryomilling of the monohydrate crystalline
form of this drug. Samples prepared by these two methods were found
to be similar with regard to their internal structure, H-bonding scheme,
and structural (α) dynamics in the supercooled liquid state.
However, based on the analysis of α-relaxation times (dielectric
measurements) predicted for temperatures below the glass-transition
temperature (Tg), as well as DSC thermograms,
it was concluded that the cryoground sample is more aged (and probably
more physically stable) compared to the vitrified one. Interestingly,
such differences in physical properties turned out to be reflected
in the lower intrinsic dissolution rate of BOS obtained by cryomilling
(in the first 15 min of dissolution test) in comparison to the vitrified
drug. Furthermore, we showed that cryogrinding of the crystalline
BOS monohydrate leads to the formation of a nearly anhydrous amorphous
sample. This finding, different from that reported by Megarry et al.
[2011, 346, 1061−106421492830] for trehalose (TRE), was revealed on the
basis of infrared and thermal measurements. Finally, two various hypotheses
explaining water removal upon cryomilling have been discussed in the
manuscript.
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Affiliation(s)
- Aldona Minecka
- Department of Pharmacognosy and Phytochemistry, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia in Katowice, ul. Jagiellonska 4, 41-200 Sosnowiec, Poland
| | - Krzysztof Chmiel
- Department of Pharmacognosy and Phytochemistry, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia in Katowice, ul. Jagiellonska 4, 41-200 Sosnowiec, Poland
| | - Karolina Jurkiewicz
- Institute of Physics, Faculty of Science and Technology, University of Silesia in Katowice, 75 Pułku Piechoty 1, 41-500 Chorzów, Poland
| | - Barbara Hachuła
- Institute of Chemistry, University of Silesia in Katowice, 40-006 Katowice, Poland
| | - Rafał Łunio
- Polpharma SA, 83-200 Starogard Gdański, Poland
| | - Daniel Żakowiecki
- Chemische Fabrik Budenheim KG, Rheinstrasse 27, 55257 Budenheim, Germany
| | - Kinga Hyla
- Chair and Department of Pharmaceutical Technology, Faculty of Pharmacy, Poznan University of Medical Sciences, 60-780 Poznan, Poland
| | - Bartłomiej Milanowski
- Chair and Department of Pharmaceutical Technology, Faculty of Pharmacy, Poznan University of Medical Sciences, 60-780 Poznan, Poland.,GENERICA Pharmaceutical Lab, Regionalne Centrum Zdrowia Sp. z o.o., Na Kępie 3, 64-360 Zbąszyń, Poland
| | - Kajetan Koperwas
- Institute of Physics, Faculty of Science and Technology, University of Silesia in Katowice, 75 Pułku Piechoty 1, 41-500 Chorzów, Poland
| | - Kamil Kamiński
- Institute of Physics, Faculty of Science and Technology, University of Silesia in Katowice, 75 Pułku Piechoty 1, 41-500 Chorzów, Poland
| | - Marian Paluch
- Institute of Physics, Faculty of Science and Technology, University of Silesia in Katowice, 75 Pułku Piechoty 1, 41-500 Chorzów, Poland
| | - Ewa Kamińska
- Department of Pharmacognosy and Phytochemistry, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia in Katowice, ul. Jagiellonska 4, 41-200 Sosnowiec, Poland
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6
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Abed J, Ahmadi S, Laverdure L, Abdellah A, O'Brien CP, Cole K, Sobrinho P, Sinton D, Higgins D, Mosey NJ, Thorpe SJ, Sargent EH. In Situ Formation of Nano Ni-Co Oxyhydroxide Enables Water Oxidation Electrocatalysts Durable at High Current Densities. Adv Mater 2021; 33:e2103812. [PMID: 34541731 DOI: 10.1002/adma.202103812] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Revised: 08/04/2021] [Indexed: 06/13/2023]
Abstract
The oxygen evolution reaction (OER) limits the energy efficiency of electrocatalytic systems due to the high overpotential symptomatic of poor reaction kinetics; this problem worsens over time if the performance of the OER electrocatalyst diminishes during operation. Here, a novel synthesis of nanocrystalline Ni-Co-Se using ball milling at cryogenic temperature is reported. It is discovered that, by anodizing the Ni-Co-Se structure during OER, Se ions leach out of the original structure, allowing water molecules to hydrate Ni and Co defective sites, and the nanoparticles to evolve into an active Ni-Co oxyhydroxide. This transformation is observed using operando X-ray absorption spectroscopy, with the findings confirmed using density functional theory calculations. The resulting electrocatalyst exhibits an overpotential of 279 mV at 0.5 A cm-2 and 329 mV at 1 A cm-2 and sustained performance for 500 h. This is achieved using low mass loadings (0.36 mg cm-2 ) of cobalt. Incorporating the electrocatalyst in an anion exchange membrane water electrolyzer yields a current density of 1 A cm-2 at 1.75 V for 95 h without decay in performance. When the electrocatalyst is integrated into a CO2 -to-ethylene electrolyzer, a record-setting full cell voltage of 3 V at current density 1 A cm-2 is achieved.
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Affiliation(s)
- Jehad Abed
- Department of Materials Science and Engineering, University of Toronto, 184 College Street, Toronto, Ontario, M5S 3E4, Canada
- Department of Electrical and Computer Engineering, University of Toronto, 35 St George Street, Toronto, Ontario, M5S 1A4, Canada
| | - Shideh Ahmadi
- Department of Chemistry, Queen's University, 90 Bader Lane, Kingston, Ontario, K7L 3N6, Canada
| | - Laura Laverdure
- Department of Chemistry, Queen's University, 90 Bader Lane, Kingston, Ontario, K7L 3N6, Canada
| | - Ahmed Abdellah
- Department of Chemical Engineering, McMaster University, Hamilton, Ontario, L8S 4L7, Canada
| | - Colin P O'Brien
- Department of Mechanical and Industrial Engineering, University of Toronto, 5 King's College Road, Toronto, Ontario, M5S 3G8, Canada
| | - Kevin Cole
- Department of Materials Science and Engineering, University of Toronto, 184 College Street, Toronto, Ontario, M5S 3E4, Canada
| | - Pedro Sobrinho
- Department of Materials Science and Engineering, University of Toronto, 184 College Street, Toronto, Ontario, M5S 3E4, Canada
| | - David Sinton
- Department of Mechanical and Industrial Engineering, University of Toronto, 5 King's College Road, Toronto, Ontario, M5S 3G8, Canada
| | - Drew Higgins
- Department of Chemical Engineering, McMaster University, Hamilton, Ontario, L8S 4L7, Canada
| | - Nicholas J Mosey
- Department of Chemistry, Queen's University, 90 Bader Lane, Kingston, Ontario, K7L 3N6, Canada
| | - Steven J Thorpe
- Department of Materials Science and Engineering, University of Toronto, 184 College Street, Toronto, Ontario, M5S 3E4, Canada
| | - Edward H Sargent
- Department of Electrical and Computer Engineering, University of Toronto, 35 St George Street, Toronto, Ontario, M5S 1A4, Canada
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Bahrami A, Ying P, Wolff U, Rodríguez NP, Schierning G, Nielsch K, He R. Reduced Lattice Thermal Conductivity for Half-Heusler ZrNiSn through Cryogenic Mechanical Alloying. ACS Appl Mater Interfaces 2021; 13:38561-38568. [PMID: 34351145 DOI: 10.1021/acsami.1c05639] [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] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
The ZrNiSn-based half-Heusler compounds are promising for thermoelectric applications in the mid-to-high temperature range. However, their thermoelectric performance was greatly limited due to the remaining high thermal conductivity, especially the lattice thermal conductivity. Herein, we report the synthesis of pristine half-Heusler ZrNiSn through direct mechanical alloying at a liquid nitrogen temperature (i.e., cryomilling) followed by spark plasma sintering. It is shown that the onset sintering temperature is greatly reduced for the cryomilled powders with a high density. A reduced thermal conductivity is subsequently realized from room temperature to 700 °C in the cryomilled samples than the one that was differently prepared (from 7.3 to 4.5 W/m K at room temperature). The pronounced reduction in thermal conductivity of ZrNiSn yields a maximum zT of ∼0.65 at 700 °C. Our study shows the possibility of cryomilling in advancing the thermoelectric performance through enhanced phonon scattering.
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Affiliation(s)
- Amin Bahrami
- Leibniz Institute for Solid State and Materials Research, Dresden 01069, Germany
| | - Pingjun Ying
- Leibniz Institute for Solid State and Materials Research, Dresden 01069, Germany
| | - Ulrike Wolff
- Leibniz Institute for Solid State and Materials Research, Dresden 01069, Germany
| | | | - Gabi Schierning
- Department of Physics, Experimental Physics, Bielefeld University, Bielefeld 33501, Germany
| | - Kornelius Nielsch
- Leibniz Institute for Solid State and Materials Research, Dresden 01069, Germany
- Institute of Materials Science, Technical University of Dresden, Dresden 01069, Germany
| | - Ran He
- Leibniz Institute for Solid State and Materials Research, Dresden 01069, Germany
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8
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Kwiczak-YİĞİtbaŞi J. Catalytic activity of novel thermoplastic/cellulose-Au nanocomposites prepared by cryomilling. Turk J Chem 2021; 44:1515-1527. [PMID: 33488248 PMCID: PMC7763122 DOI: 10.3906/kim-2005-53] [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: 05/21/2020] [Accepted: 08/21/2020] [Indexed: 11/03/2022] Open
Abstract
Due to environmental concerns, increasing attention has been focused on the application and preparation of biobased polymers and their blends. In this study, cellulose, the most spread biopolymer on Earth, was used in the preparation of novel cotton/polypropylene-Au and cotton/polyethylene-Au nanocomposites via a green mechanochemical approach. First, mechanoradicals were generated by ball milling of the cotton and thermoplastics under cryo conditions, and then, these radicals were used in the reduction of Au ions to Au nanoparticles (Au NPs). Nanocomposites were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The application of mechanochemistry in obtaining the cotton/thermoplastic blends allowed homogenous and fine blending of the samples and in addition, excluded the usage of toxic solvents. Since Au NPs exhibit a wide range of applications, e.g., in catalysis, cotton/thermoplastic-Au nanocomposites were used to catalyze the reduction reaction of 4-nitrophenol to
4-aminophenol, followed by UV-Vis spectroscopy. Finally, the hydrophobicity of the nanocomposites was alternated by tuning the blend composition. In the prepared nanocomposites, cotton and thermoplastics acted as very good supporting matrices for the Au NPs and provided satisfactory access to the NPs.
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9
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Pas T, Bergonzi A, Michiels E, Rousseau F, Schymkowitz J, Koekoekx R, Clasen C, Vergauwen B, Van den Mooter G. Preparation of Amorphous Solid Dispersions by Cryomilling: Chemical and Physical Concerns Related to Active Pharmaceutical Ingredients and Carriers. Mol Pharm 2020; 17:1001-1013. [PMID: 31961692 DOI: 10.1021/acs.molpharmaceut.9b01265] [Citation(s) in RCA: 8] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In this work, a chemical (and physical) evaluation of cryogenic milling to manufacture amorphous solid dispersions (ASDs) is provided to support novel mechanistic insights in the cryomilling process. Cryogenic milling devices are considered as reactors in which both physical transitions (reduction in crystallite size, polymorphic transformations, accumulation of crystallite defects, and partial or complete amorphization) and chemical reactions (chemical decomposition, etc.) can be mechanically triggered. In-depth characterization of active pharmaceutical ingredient (API) (content determination) and polymer (viscosity, molecular weight, dynamic vapor sorption, Fourier transform infrared spectroscopy, dynamic light scattering, and ANS and thioflavin T staining) chemical decomposition demonstrated APIs to be more prone to chemical degradation in case of presence of a polymer. A significant reduction of the polymer chain length was observed and in case of BSA denaturation/aggregation. Hence, mechanochemical activation process(es) for amorphization and ASD manufacturing cannot be regarded as a mild technique, as generally put forward, and one needs to be aware of chemical degradation of both APIs and polymers.
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Affiliation(s)
- Timothy Pas
- Drug Delivery and Disposition, Department of Pharmaceutical and Pharmacological Sciences, Campus Gasthuisberg ON2, KU Leuven, Herestraat 49 b921, Leuven 3000, Belgium
| | - Alessandra Bergonzi
- Drug Delivery and Disposition, Department of Pharmaceutical and Pharmacological Sciences, Campus Gasthuisberg ON2, KU Leuven, Herestraat 49 b921, Leuven 3000, Belgium
| | - Emiel Michiels
- VIB Center for Brain and Disease Research, KU Leuven, Leuven B-3000, Belgium.,Switch Laboratory, Department of Cellular and Molecular Medicine, KU Leuven, Leuven 3000, Belgium
| | - Frederic Rousseau
- VIB Center for Brain and Disease Research, KU Leuven, Leuven B-3000, Belgium.,Switch Laboratory, Department of Cellular and Molecular Medicine, KU Leuven, Leuven 3000, Belgium
| | - Joost Schymkowitz
- VIB Center for Brain and Disease Research, KU Leuven, Leuven B-3000, Belgium.,Switch Laboratory, Department of Cellular and Molecular Medicine, KU Leuven, Leuven 3000, Belgium
| | - Robin Koekoekx
- Soft Matter, Rheology and Technology, Department of Chemical Engineering, KU Leuven, Celestijnenlaan 200f - bus 2424, Leuven 3001, Belgium
| | - Christian Clasen
- Soft Matter, Rheology and Technology, Department of Chemical Engineering, KU Leuven, Celestijnenlaan 200f - bus 2424, Leuven 3001, Belgium
| | - Bjorn Vergauwen
- Rousselot bvba, Expertise center, Meulestedekaai 81, Gent 9000, Belgium
| | - Guy Van den Mooter
- Drug Delivery and Disposition, Department of Pharmaceutical and Pharmacological Sciences, Campus Gasthuisberg ON2, KU Leuven, Herestraat 49 b921, Leuven 3000, Belgium
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10
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Pu K, Qu X, Zhang X, Hu J, Gu C, Wu Y, Gao M, Pan H, Liu Y. Nanoscaled Lithium Powders with Protection of Ionic Liquid for Highly Stable Rechargeable Lithium Metal Batteries. Adv Sci (Weinh) 2019; 6:1901776. [PMID: 31871859 PMCID: PMC6918098 DOI: 10.1002/advs.201901776] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2019] [Revised: 09/12/2019] [Indexed: 05/30/2023]
Abstract
To suppress the dendrite formation and alleviate volume expansion upon striping/platting is a key challenge for developing practical lithium metal anodes. Lithium metal in powder form possesses great potential to address this issue due to large specific surface area. However, the fabrication of powdery metallic lithium is largely restricted because of its unique softness, stickiness, and high reactivity. Here, a safe and readily accessible cryomilling process toward lithium powders is reported. Nanoscaled lithium powders (<500 nm) are successfully prepared from lithium foils with the assistance of a high-melting-point ionic liquid under cryogenic temperature. The prepared lithium powder anode exhibits superior electrochemical properties in symmetric cells, including extraordinarily low yet stable overpotential (≈50 mV), ultrahigh area capacity (30 mAh cm-2), and good long-term cyclability (1200 h) even cycling at high current density (10 mA cm-2). The powdery form of lithium also functions as a favorable prelithiation reagent for lithium-free anodes (e.g., Si, SiO, and SnO2). The findings open up a new avenue for the real-world application of lithium metal anodes for next-generation lithium batteries.
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Affiliation(s)
- Kaichao Pu
- State Key Laboratory of Silicon Materials and School of Materials Science and EngineeringZhejiang UniversityHangzhou310027China
| | - Xiaolei Qu
- State Key Laboratory of Silicon Materials and School of Materials Science and EngineeringZhejiang UniversityHangzhou310027China
| | - Xin Zhang
- State Key Laboratory of Silicon Materials and School of Materials Science and EngineeringZhejiang UniversityHangzhou310027China
| | - Jianjiang Hu
- Science and Technology on Aerospace Chemical Power LaboratoryHubei Institute of Aerospace ChemotechnologyXiangyang441003China
| | - Changdong Gu
- State Key Laboratory of Silicon Materials and School of Materials Science and EngineeringZhejiang UniversityHangzhou310027China
| | - Yongjun Wu
- State Key Laboratory of Silicon Materials and School of Materials Science and EngineeringZhejiang UniversityHangzhou310027China
| | - Mingxia Gao
- State Key Laboratory of Silicon Materials and School of Materials Science and EngineeringZhejiang UniversityHangzhou310027China
| | - Hongge Pan
- State Key Laboratory of Silicon Materials and School of Materials Science and EngineeringZhejiang UniversityHangzhou310027China
| | - Yongfeng Liu
- State Key Laboratory of Silicon Materials and School of Materials Science and EngineeringZhejiang UniversityHangzhou310027China
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11
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Huot J, Cuevas F, Deledda S, Edalati K, Filinchuk Y, Grosdidier T, Hauback BC, Heere M, Jensen TR, Latroche M, Sartori S. Mechanochemistry of Metal Hydrides: Recent Advances. Materials (Basel) 2019; 12:E2778. [PMID: 31470536 DOI: 10.3390/ma12172778] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Revised: 08/15/2019] [Accepted: 08/24/2019] [Indexed: 12/19/2022]
Abstract
This paper is a collection of selected contributions of the 1st International Workshop on Mechanochemistry of Metal Hydrides that was held in Oslo in May 2018. In this paper, the recent developments in the use of mechanochemistry to synthesize and modify metal hydrides are reviewed. A special emphasis is made on new techniques beside the traditional way of ball milling. High energy milling, ball milling under hydrogen reactive gas, cryomilling and severe plastic deformation techniques such as High-Pressure Torsion (HPT), Surface Mechanical Attrition Treatment (SMAT) and cold rolling are discussed. The new characterization method of in-situ X-ray diffraction during milling is described.
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12
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Tran PL, Li J, Lungaro L, Ramesh S, Ivanov IN, Moon JW, Graham DE, Hamood A, Wang J, Elfick AP, Rivero IV. Cryomilled zinc sulfide: A prophylactic for Staphylococcus aureus-infected wounds. J Biomater Appl 2018; 33:82-93. [PMID: 29683016 DOI: 10.1177/0885328218770530] [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: 11/15/2022]
Abstract
Bacterial pathogens that colonize wounds form biofilms, which protect the bacteria from the effect of host immune response and antibiotics. This study examined the effectiveness of newly synthesized zinc sulfide in inhibiting biofilm development by Staphylococcus aureus ( S. aureus) strains. Zinc sulfide (ZnS) was anaerobically biosynthesized to produce CompA, which was further processed by cryomilling to maximize the antibacterial properties to produce CompB. The effect of the two compounds on the S. aureus strain AH133 was compared using zone of inhibition assay. The compounds were formulated in a polyethylene glycol cream. We compared the effect of the two compounds on biofilm development by AH133 and two methicillin-resistant S. aureus clinical isolates using the in vitro model of wound infection. Zone of inhibition assay revealed that CompB is more effective than CompA. At 15 mg/application, the formulated cream of either compound inhibited biofilm development by AH133, which was confirmed using confocal laser scanning microscopy. At 20 mg/application, CompB inhibited biofilm development by the two methicillin-resistant S. aureus clinical isolates. To further validate the effectiveness of CompB, mice were treated using the murine model of wound infection. Colony forming cell assay and in vivo live imaging results strongly suggested the inhibition of S. aureus growth.
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Affiliation(s)
- Phat L Tran
- 1 Department of Ophthalmology and Visual Sciences, Texas Tech University Health Sciences Center, School of Medicine, Lubbock, Texas, USA
| | - Jianqiang Li
- 2 Department of Industrial and Manufacturing Systems Engineering, Iowa State University, Ames IA, USA
| | - Lisa Lungaro
- 3 Institute for Bioengineering, University of Edinburgh, Edinburgh, Scotland, UK
| | - Srikanthan Ramesh
- 2 Department of Industrial and Manufacturing Systems Engineering, Iowa State University, Ames IA, USA
| | - Ilia N Ivanov
- 4 Center for Nanophase Materials Science, Oak Ridge National Laboratory, Oak Ridge TN, USA
| | - Ji-Won Moon
- 5 Biosciences Division, Oak Ridge National Laboratory, Oak Ridge TN, USA
| | - David E Graham
- 5 Biosciences Division, Oak Ridge National Laboratory, Oak Ridge TN, USA
| | - Abdul Hamood
- 6 Department of Molecular Microbiology and Immunology, Texas Tech University Health Sciences Center, Lubbock, Texas, USA.,7 Department of Surgery, Texas Tech University Health Sciences Center, Lubbock, Texas, USA
| | - James Wang
- 8 School of Medicine, Texas Tech University Health Sciences Center, Lubbock, Texas, USA
| | - Alistair Pd Elfick
- 3 Institute for Bioengineering, University of Edinburgh, Edinburgh, Scotland, UK
| | - Iris V Rivero
- 2 Department of Industrial and Manufacturing Systems Engineering, Iowa State University, Ames IA, USA.,7 Department of Surgery, Texas Tech University Health Sciences Center, Lubbock, Texas, USA
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13
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Abstract
Affinity capture is an effective technique for isolating endogenous protein complexes for further study. When used in conjunction with an antibody, this technique is also frequently referred to as immunoprecipitation. Affinity capture can be applied in a bench-scale and in a high-throughput context. When coupled with protein mass spectrometry, affinity capture has proven to be a workhorse of interactome analysis. Although there are potentially many ways to execute the numerous steps involved, the following protocols implement our favored methods. Two features are distinctive: the use of cryomilled cell powder to produce cell extracts, and antibody-coupled paramagnetic beads as the affinity medium. In many cases, we have obtained superior results to those obtained with more conventional affinity capture practices. Cryomilling avoids numerous problems associated with other forms of cell breakage. It provides efficient breakage of the material, while avoiding denaturation issues associated with heating or foaming. It retains the native protein concentration up to the point of extraction, mitigating macromolecular dissociation. It reduces the time extracted proteins spend in solution, limiting deleterious enzymatic activities, and it may reduce the non-specific adsorption of proteins by the affinity medium. Micron-scale magnetic affinity media have become more commonplace over the last several years, increasingly replacing the traditional agarose- and Sepharose-based media. Primary benefits of magnetic media include typically lower non-specific protein adsorption; no size exclusion limit because protein complex binding occurs on the bead surface rather than within pores; and ease of manipulation and handling using magnets.
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Affiliation(s)
- John LaCava
- Laboratory of Cellular and Structural Biology, The Rockefeller University; Institute for Systems Genetics, Department of Biochemistry and Molecular Pharmacology, New York University School of Medicine;
| | - Hua Jiang
- Laboratory of Cellular and Structural Biology, The Rockefeller University
| | - Michael P Rout
- Laboratory of Cellular and Structural Biology, The Rockefeller University
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Singhal M, Del Río-Sancho S, Sonaje K, Kalia YN. Fractional Laser Ablation for the Cutaneous Delivery of Triamcinolone Acetonide from Cryomilled Polymeric Microparticles: Creating Intraepidermal Drug Depots. Mol Pharm 2016; 13:500-11. [PMID: 26731121 DOI: 10.1021/acs.molpharmaceut.5b00711] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [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: 11/28/2022]
Abstract
The efficacy of some dermatological therapies might be improved by the use of "high dose" intraepidermal drug reservoir systems that enable sustained and targeted local drug delivery, e.g., in the treatment of keloids and hypertrophic scars. Here, a fractionally ablative erbium:YAG laser was used to enable "needle-less" cutaneous deposition of polymeric microparticles containing triamcinolone acetonide (TA). The microparticles were prepared using a freeze-fracture technique employing cryomilling that resulted in drug loading efficiencies of ∼100%. They were characterized by several different techniques, including scanning electron microscopy, powder X-ray diffraction and differential scanning calorimetry. TA was quantified by validated HPLC-UV and UHPLC-MS/MS analytical methods. In vitro release studies demonstrated the effect of polymer properties on TA release kinetics. Confocal laser scanning microscopy enabled visualization of cryomilled microparticles containing fluorescein and Nile Red in the cutaneous micropores and the subsequent release of fluorescein into the micropores and its diffusion throughout the epidermis and upper dermis. The biodistribution of TA, i.e. the amount of drug as a function of depth in skin, following microparticle application was much more uniform than with a TA suspension and delivery was selective for deposition with less transdermal permeation. These findings suggest that this approach may provide an effective, targeted and minimally invasive alternative to painful intralesional injections for the treatment of keloid scars.
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Affiliation(s)
- Mayank Singhal
- School of Pharmaceutical Sciences, University of Geneva & University of Lausanne , 30 Quai Ernest Ansermet, 1211 Geneva, Switzerland
| | - Sergio Del Río-Sancho
- School of Pharmaceutical Sciences, University of Geneva & University of Lausanne , 30 Quai Ernest Ansermet, 1211 Geneva, Switzerland
| | - Kiran Sonaje
- School of Pharmaceutical Sciences, University of Geneva & University of Lausanne , 30 Quai Ernest Ansermet, 1211 Geneva, Switzerland
| | - Yogeshvar N Kalia
- School of Pharmaceutical Sciences, University of Geneva & University of Lausanne , 30 Quai Ernest Ansermet, 1211 Geneva, Switzerland
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15
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Abstract
Proper sampling and sample processing in pesticide residue analysis of food and soil have always been essential to obtain accurate results, but the subject is becoming a greater concern as approximately 100 mg test portions are being analyzed with automated high-throughput analytical methods by agrochemical industry and contract laboratories. As global food trade and the importance of monitoring increase, the food industry and regulatory laboratories are also considering miniaturized high-throughput methods. In conjunction with a summary of the symposium "Residues in Food and Feed - Going from Macro to Micro: The Future of Sample Processing in Residue Analytical Methods" held at the 13th IUPAC International Congress of Pesticide Chemistry, this is an opportune time to review sampling theory and sample processing for pesticide residue analysis. If collected samples and test portions do not adequately represent the actual lot from which they came and provide meaningful results, then all costs, time, and efforts involved in implementing programs using sophisticated analytical instruments and techniques are wasted and can actually yield misleading results. This paper is designed to briefly review the often-neglected but crucial topic of sample collection and processing and put the issue into perspective for the future of pesticide residue analysis. It also emphasizes that analysts should demonstrate the validity of their sample processing approaches for the analytes/matrices of interest and encourages further studies on sampling and sample mass reduction to produce a test portion.
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Affiliation(s)
- Steven J Lehotay
- †Eastern Regional Research Center, Agricultural Research Service, U.S. Department of Agriculture, 600 East Mermaid Lane, Wyndmoor, Pennsylvania 19038, United States
| | - Jo Marie Cook
- §Division of Food Safety, Florida Department of Agriculture and Consumer Services, 3125 Conner Boulevard, Tallahassee, Florida 32399, United States
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Riter LS, Lynn KJ, Wujcik CE, Buchholz LM. Interlaboratory assessment of cryomilling sample preparation for residue analysis. J Agric Food Chem 2015; 63:4405-4408. [PMID: 25531239 DOI: 10.1021/jf505249y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The effectiveness of the comminution approach used for bulk field samples limits the size of the subsample that must be extracted and analyzed to ensure an adequately representative and reproducible measurement. In many cases this subsample size restricts the residue method to the use of larger vessel formats, limiting downstream throughput. The introduction of a secondary fine-milling step to this process using a subsample size already known to be representative can further improve sample homogeneity and allow direct method scaling to small high-throughput formats. Dramatic increases in method throughput can then be achieved through the simultaneous processing of numerous samples in parallel. This approach was evaluated across a diverse grouping of crop matrices using two substantially different pesticide types. Both fortified and field-collected samples demonstrated a high degree of precision and reproducibility across laboratories. Additional benefits of this approach include significant reductions in cost and solvent waste generation, as well as improvements in assay quality and transferability.
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Affiliation(s)
- Leah S Riter
- †Monsanto Company, 800 North Lindbergh Boulevard, St. Louis, Missouri 63167, United States
| | - Kari J Lynn
- §Dow AgroSciences, 9330 Zionsville Road, Indianapolis, Indiana 46268, United States
| | - Chad E Wujcik
- †Monsanto Company, 800 North Lindbergh Boulevard, St. Louis, Missouri 63167, United States
| | - Lisa M Buchholz
- §Dow AgroSciences, 9330 Zionsville Road, Indianapolis, Indiana 46268, United States
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Lim J, Chong MSK, Chan JKY, Teoh SH. Polymer powder processing of cryomilled polycaprolactone for solvent-free generation of homogeneous bioactive tissue engineering scaffolds. Small 2014; 10:2495-2502. [PMID: 24740849 DOI: 10.1002/smll.201302389] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2013] [Revised: 12/26/2013] [Indexed: 06/03/2023]
Abstract
Synthetic polymers used in tissue engineering require functionalization with bioactive molecules to elicit specific physiological reactions. These additives must be homogeneously dispersed in order to achieve enhanced composite mechanical performance and uniform cellular response. This work demonstrates the use of a solvent-free powder processing technique to form osteoinductive scaffolds from cryomilled polycaprolactone (PCL) and tricalcium phosphate (TCP). Cryomilling is performed to achieve micrometer-sized distribution of PCL and reduce melt viscosity, thus improving TCP distribution and improving structural integrity. A breakthrough is achieved in the successful fabrication of 70 weight percentage of TCP into a continuous film structure. Following compaction and melting, PCL/TCP composite scaffolds are found to display uniform distribution of TCP throughout the PCL matrix regardless of composition. Homogeneous spatial distribution is also achieved in fabricated 3D scaffolds. When seeded onto powder-processed PCL/TCP films, mesenchymal stem cells are found to undergo robust and uniform osteogenic differentiation, indicating the potential application of this approach to biofunctionalize scaffolds for tissue engineering applications.
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Affiliation(s)
- Jing Lim
- Division of Bioengineering, School of Chemical and Biomedical Engineering, 70 Nanyang Drive, Singapore, 637457, Singapore
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