Relevant bibliographies by topics / SPI nanofibers

Academic literature on the topic 'SPI nanofibers'

Author: Grafiati
Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "SPI nanofibers"

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Lee, Hyun-Jung, Celine DG Abueva, Andrew R. Padalhin, and Byong-Taek Lee. "Soya protein isolate-polyethylene oxide electrospun nanofiber membrane with bone marrow-derived mesenchymal stem cell for enhanced bone regeneration." Journal of Biomaterials Applications 34, no. 8 (December 5, 2019): 1142–49. http://dx.doi.org/10.1177/0885328219891614.

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In this study, we prepared an electrospun nanofiber membrane from soya protein isolate (SPI) and polyethylene oxide (PEO) loaded with rat bone marrow-derived mesenchymal stem cells (rBMSC), as a cell-scaffold approach to enhance bone regeneration. Different ratios of SPI:PEO (7:0, 7:1, 7:3, 7:5, and 0:7) was investigated to obtain uniform nanofibers, and crosslinked with EDC/NHS to stabilize the membranes. SPI/PEO membrane (7:3) was found to create more uniform and stable nanofibers at a flow rate of 9 µL/min, spun in a cylindrical collector rotating at 350 r/min, 23 kV DC voltage, and needle tip to collector distance of 13 cm. The loaded rBMSC were pre-differentiated to ensure commitment towards osteoblastic lineage. The SPI/PEO electrospun nanofiber membranes were successful in allowing for cell attachment and growth of the rBMSC and was further investigated in vivo using a rat skull defect model. New bone formation was observed for the optimized SPI/PEO electrospun nanofiber membrane (7:3) with and without rBMSC, but with faster new bone formation for SPI/PEO electrospun nanofiber membrane loaded with rBMSC as compared to SPI/PEO electrospun nanofiber membrane only and control (defect only).
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Phiriyawirut, M., N. Rodchanacheewa, N. Nensiri, and Pitt Supaphol. "Morphology of Electrospun Mats of Soy Protein Isolate and its Blend." Advanced Materials Research 55-57 (August 2008): 733–36. http://dx.doi.org/10.4028/www.scientific.net/amr.55-57.733.

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Electrospinning has been recognized as an efficient technique for the forming of polymer nanofibers. In this project interest fabricated Soy Protein Isolate (SPI) nanofibers by electrospinning with different supply voltages, positive and negative charge. SPI was dissolved in 80%-95% w/w acetic acid solution and 80%-90% w/w formic acid solution. Only droplet formation of SPI were found instead of fibril formation, and the droplet morphology of SPI is depended on supply voltage, and type of solvent. SPI droplets from the negative supply voltage have smaller and more nodular than droplets from positive supply voltage. Formic acid SPI solution gives smaller size of droplet and more nodular than acetic acid SPI solution. In order to forming SPI nanofibers, zein/SPI blend were performed. The zein/SPI blend was studied at difference blending ratio. The 95/5 Zein/SPI was found to be the best blend composition for electrospun fiber. In addition, the effects of electrostatic distance and electrostatic voltage on electrospun fiber were also investigated. Increasing electrostatic distance or increasing voltage, smaller size of fiber was obtained.
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Qin, Zhiyong, Liuting Mo, Murong Liao, Hua He, and Jianping Sun. "Preparation and Characterization of Soy Protein Isolate-Based Nanocomposite Films with Cellulose Nanofibers and Nano-Silica via Silane Grafting." Polymers 11, no. 11 (November 7, 2019): 1835. http://dx.doi.org/10.3390/polym11111835.

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Soy protein isolate (SPI) has attracted considerable attention in the field of packaging technology due to its easy processability, biodegradability, and good film-forming characteristics. However, SPI-based films often suffer from inferior mechanical properties and high moisture sensitivity, thus restricting their practical application. In the present study, herein, a biobased nanocomposite film was developed by cross-linking SPI matrix from the synergistic reinforcement of cellulose nanofibers (CNF) and nano-silica (NS) particles. First, we functionalized the CNF with NS using a silane agent (KH560) as an efficient platform to enhance the interfacial interaction between SPI and CNF/NS, resulting from the epoxy-dominated cross-linking reaction. The chemical structure, thermal stability, and morphology of the resultant nanocomposite films were comprehensively investigated via Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), and thermogravimetric analysis (TGA). These results supported successful surface modification and indicated that the surface-tailored CNF/NS nanohybrid possesses excellent adhesion with SPI matrix through covalent and hydrogen-bonding interactions. The integration of CNF/NS into SPI resulted in nanocomposite films with an improved tensile strength (6.65 MPa), representing a 90.54% increase compared with the pristine SPI film. Moreover, the resulting composites had a significantly decreased water vapor permeation and a higher water contact angle (91.75°) than that of the unmodified film. The proposed strategy of synergistic reinforcements in the biobased composites may be a promising and green approach to address the critical limitations of plant protein-based materials in practical applications.
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Wei, Ningsi, Murong Liao, Kaijie Xu, and Zhiyong Qin. "High-performance soy protein-based films from cellulose nanofibers and graphene oxide constructed synergistically via hydrogen and chemical bonding." RSC Advances 11, no. 37 (2021): 22812–19. http://dx.doi.org/10.1039/d1ra02484a.

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Chae, Ji Su, Won-seop Kang, and Kwang Chul Roh. "sp2–sp3 Hybrid Porous Carbon Materials Applied for Supercapacitors." Energies 14, no. 19 (September 22, 2021): 5990. http://dx.doi.org/10.3390/en14195990.

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Carbon materials have gained considerable attention in recent years due to their superior properties. Activated carbon has been used in supercapacitors due to its density and rapid adsorption capability. The sp2–sp3 hybrid porous carbon materials are synthesized using herringbone-type carbon nanofibers (CNFs) and carbonized spherical phenol resins, with KOH as the activating agent. The morphology of the hybrid porous carbon facilitates the formation of ribbon-like nanosheets from highly activated CNFs wrapped around spherical resin-based activated carbon. The etching and separation of the CNFs produce a thin ribbon-like nanosheet structure; these CNFs simultaneously form new bonds with activated carbon, forming the sp2–sp3 hybrid porous structure. The relatively poor electrical conductivity of amorphous carbon is improved by the 3D conductive network that interconnects the CNF and amorphous carbon without requiring additional conductive material. The composite electrode has high electron conductivity and a large surface area with a specific capacitance of 120 F g−1. Thus, the strategy substantially simplifies the hybrid materials of sp2-hybridized CNFs and sp3-hybridized amorphous spherical carbon and significantly improves the comprehensive electrochemical performance of supercapacitors. The developed synthesis strategy provides important insights into the design and fabrication of carbon nanostructures that can be potentially applied as electrode materials for supercapacitors.
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Matysiak, Wiktor, Tomasz Tański, and Weronika Monika Smok. "Morphology and structure characterization of crystalline SnO2 1D nanostructures." Photonics Letters of Poland 12, no. 3 (September 30, 2020): 70. http://dx.doi.org/10.4302/plp.v12i3.1019.

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In recent years, many attempts have been made to improve the sensory properties of SnO2, including design of sensors based on one-dimensional nanostructures of this material, such as nanofibers, nanotubes or nanowires. One of the simpler methods of producing one-dimensional tin oxide nanomaterials is to combine the electrospinning method with a sol-gel process. The purpose of this work was to produce SnO2 nanowires using a hybrid electrospinning method combined with a heat treatment process at the temperature of 600 °C and to analyze the morphology and structure of the one-dimensional nanomaterial produced in this way. Analysis of the morphology of composite one-dimensional tin oxide nanostructures showed that smooth, homogeneous and crystalline nanowires were obtained. Full Text: PDF ReferencesN. Dharmaraj, C.H. Kim, K.W. Kim, H.Y. Kim, E.K. Suh, "Spectral studies of SnO2 nanofibres prepared by electrospinning method", Spectrochim. Acta - Part A Mol. Biomol. Spectrosc. 64, (2006) CrossRef N. Gao, H.Y. Li, W. Zhang, Y. Zhang, Y. Zeng, H. Zhixiang, ... & H. Liu, "QCM-based humidity sensor and sensing properties employing colloidal SnO2 nanowires", Sens. Actuators B Chem. 293, (2019), 129-135. CrossRef W. Ge, Y. Chang, V. Natarajan, Z. Feng, J. Zhan, X. Ma, "In2O3-SnO2 hybrid porous nanostructures delivering enhanced formaldehyde sensing performance", J.Alloys and Comp. 746, (2018) CrossRef M. Zhang, Y. Zhen, F. Sun, C. Xu, "Hydrothermally synthesized SnO2-graphene composites for H2 sensing at low operating temperature", Mater. Sci. Eng. B. 209, (2016), 37-44. CrossRef Y. Zhang, X. He, J. Li, Z. Miao, F. Huang, "Fabrication and ethanol-sensing properties of micro gas sensor based on electrospun SnO2 nanofibers", Sens. Actuators B Chem. 132, (2008), 67-73. CrossRef W.Q. Li, S.Y. Ma, J. Luo, Y.Z. Mao, L. Cheng, D.J. Gengzang, X.L. Xu, S H. Yan, "Synthesis of hollow SnO2 nanobelts and their application in acetone sensor", Mater. Lett. 132, (2014), 338-341. CrossRef E. Mudra, I. Shepa, O. Milkovic, Z. Dankova, A. Kovalcikova, A. Annusova, E. Majkova, J. Dusza, "Effect of iron doping on the properties of SnO2 nano/microfibers", Appl. Surf. Sci. 480, (2019), 876-881. CrossRef P. Mohanapriya, H. Segawa, K. Watanabe, K. Watanabe, S. Samitsu, T.S. Natarajan, N.V. Jaya, N. Ohashi, "Enhanced ethanol-gas sensing performance of Ce-doped SnO2 hollow nanofibers prepared by electrospinning", Sens. Actuators B Chem. 188, (2013), 872-878. CrossRef W.Q. Li, S.Y. Ma, Y.F. Li, X.B. Li, C.Y. Wang, X.H. Yang, L. Cheng, Y.Z. Mao, J. Luo, D.J. Gengzang, G.X. Wan, X.L. Xu, "Preparation of Pr-doped SnO2 hollow nanofibers by electrospinning method and their gas sensing properties", J.Alloys and Comp. 605, (2014), 80-88. CrossRef X.H. Xu, S.Y. Ma, X.L. Xu, T. Han, S.T. Pei, Y. Tie, P.F. Cao, W.W. Liu, B.J. Wang, R. Zhang, J.L. Zhang, "Ultra-sensitive glycol sensing performance with rapid-recovery based on heterostructured ZnO-SnO2 hollow nanotube", Mater. Lett, 273, (2020), 127967. CrossRef F. Li, X. Gao, R. Wang, T. Zhang, G. Lu, Sens. "Study on TiO2-SnO2 core-shell heterostructure nanofibers with different work function and its application in gas sensor", Actuators B Chem, 248, (2017), 812-819. CrossRef S. Bai, W. Guo, J. Sun, J. Li, Y. Tian, A. Chen, R. Luo, D. Li, "Synthesis of SnO2–CuO heterojunction using electrospinning and application in detecting of CO", Sens Actuators B Chem, 226, (2016), 96-103. CrossRef H. Du, P.J. Yao, Y. Sun, J. Wang, H. Wang, N. Yu, "Electrospinning Hetero-Nanofibers In2O3/SnO2 of Homotype Heterojunction with High Gas Sensing Activity", Sensors, 17, (2017), 1822. CrossRef X. Wang, H. Fan, P. Ren, "Electrospinning derived hollow SnO2 microtubes with highly photocatalytic property", Catal. Commun. 31, (2013), 37-41. CrossRef L. Cheng, S.Y. Ma, T.T. Wang, X.B. Li, J. Luo, W.Q. Li, Y.Z. Mao, D.J Gengzang, "Synthesis and characterization of SnO2 hollow nanofibers by electrospinning for ethanol sensing properties", Mater. Lett. 131, (2014), 23-26. CrossRef P.H. Phuoc, C.M. Hung, N.V. Toan, N.V. Duy, N.D. Hoa, N.V. Hieu, "One-step fabrication of SnO2 porous nanofiber gas sensors for sub-ppm H2S detection", Sens. Actuators A Phys. 303, (2020), 111722. CrossRef A.E. Deniz, H.A. Vural, B. Ortac, T. Uyar, "Gold nanoparticle/polymer nanofibrous composites by laser ablation and electrospinning", Matter. Lett. 65, (2011), 2941-2943. CrossRef S. Sagadevan, J. Podder, "Investigation on Structural, Surface Morphological and Dielectric Properties of Zn-doped SnO2 Nanoparticles", Mater. Res. 19, (2016), 420-425. CrossRef
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KUMAR, A., and SOMIK BANERJEE. "SWIFT HEAVY ION IRRADIATION: A NOVEL TECHNIQUE FOR TAILORING THE SIZE OF POLYANILINE NANOFIBERS." International Journal of Nanoscience 10, no. 01n02 (February 2011): 161–65. http://dx.doi.org/10.1142/s0219581x11007442.

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Swift heavy ion (SHI) (energy > 1 MeV/u) irradiation of polymer nanostructures is a novel technique to tailor their structure and properties. Polyaniline nanofibers synthesized by interfacial polymerization using HCl and camphor sulfonic acid (CSA) as dopants have been irradiated with 90 MeV O 7+ ion at different fluences of 3 × 1010, 3 × 1011, and 1 × 1012 ions/cm2. TEM micrographs of the irradiated nanofibers reveal a gradual decrease in the size of the nanofibers with an increase in fluence, which could be attributed to the strain-induced fragmentation upon SHI irradiation. The generation of strain in the PAni nanofibers upon SHI irradiation can be explained on the basis of the Coulomb explosion model. X-ray diffraction analysis for both the HCl and CSA-doped nanofibers shows broadening of the peak at 2θ = 20.050, which can be attributed to the reduced domain length and enhanced strain in the material. The two contributions have been separated out. The samples have been characterized with microRaman spectroscopy, which shows a decrease in the intensity of the Raman active modes that can be attributed to the reduction in size of the nanofibers leading to the amorphization of the material.
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Ismail, Mohamed, Sara Ibrahim, Azza El-Amir, Amira EL-Rafei, Nageh Allam, and Ahmed Abdellatif. "Genistein Loaded Nanofibers Protect Spinal Cord Tissue Following Experimental Injury in Rats." Biomedicines 6, no. 4 (October 4, 2018): 96. http://dx.doi.org/10.3390/biomedicines6040096.

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Innovative drug-delivery systems offer a unique approach to effectively provide therapeutic drug dose over the needed time to achieve better tissue protection and enhanced recovery. The hypothesis of the current study was to test the antioxidant and anti-inflammatory effects of genistein and nanofibers on the spinal cord tissue following experimental spinal cord injury (SCI). Rats were treated post SCI with genistein that is loaded on chitosan/polyvinyl alcohol (CS/PVA) nanofibers as an implantable drug-delivery system. SCI caused marked oxidative damage and inflammation, as is evident by the reduction in the super oxide dismutase (SOD) activity and the level of interleukin-10 (IL-10) in injured spinal cord tissue, as well as the significant increase in the levels of nitric oxide (NO), malondialdehyde (MDA), and tumor necrosis factor-alpha (TNF-α). Treatment of rats post SCI with genistein and CS/PVA nanofibers improved most of the above-mentioned biochemical parameters and shifted them toward the control group values. Genistein induced an increase in the activity of SOD and the level of IL-10, while causing a decrease in NO, MDA, and TNF-α in injured spinal cord tissue. Genistein and CS/PVA nanofibers provide a novel combination for treating inflammatory nervous tissue conditions, especially when combined as an implantable drug-delivery system.
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Liu, Zhuo-Hao, Yin-Cheng Huang, Chang-Yi Kuo, Chao-Ying Kuo, Chieh-Yu Chin, Ping K. Yip, and Jyh-Ping Chen. "Docosahexaenoic Acid-Loaded Polylactic Acid Core-Shell Nanofiber Membranes for Regenerative Medicine after Spinal Cord Injury: In Vitro and In Vivo Study." International Journal of Molecular Sciences 21, no. 19 (September 24, 2020): 7031. http://dx.doi.org/10.3390/ijms21197031.

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Spinal cord injury (SCI) is associated with disability and a drastic decrease in quality of life for affected individuals. Previous studies support the idea that docosahexaenoic acid (DHA)-based pharmacological approach is a promising therapeutic strategy for the management of acute SCI. We postulated that a nanostructured material for controlled delivery of DHA at the lesion site may be well suited for this purpose. Toward this end, we prepare drug-loaded fibrous mats made of core-shell nanofibers by electrospinning, which contained a polylactic acid (PLA) shell for encapsulation of DHA within the core, for delivery of DHA in situ. In vitro study confirmed sustained DHA release from PLA/DHA core-shell nanofiber membrane (CSNM) for up to 36 days, which could significantly increase neurite outgrowth from primary cortical neurons in 3 days. This is supported by the upregulation of brain-derived neurotropic factor (BDNF) and neurotrophin-3 (NT-3) neural marker genes from qRT-PCR analysis. Most importantly, the sustained release of DHA could significantly increase the neurite outgrowth length from cortical neuron cells in 7 days when co-cultured with PLA/DHA CSNM, compared with cells cultured with 3 μM DHA. From in vivo study with a SCI model created in rats, implantation of PLA/DHA CSNM could significantly improve neurological functions revealed by behavior assessment in comparison with the control (no treatment) and the PLA CSNM groups. According to histological analysis, PLA/DHA CSNM also effectively reduced neuron loss and increased serotonergic nerve sprouting. Taken together, the PLA/DHA CSNM may provide a nanostructured drug delivery system for DHA and contribute to neuroprotection and promoting neuroplasticity change following SCI.
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Opálková Šišková, Alena, Mária Bučková, Zuzana Kroneková, Angela Kleinová, Štefan Nagy, Joanna Rydz, Andrej Opálek, Monika Sláviková, and Anita Eckstein Andicsová. "The Drug-Loaded Electrospun Poly(ε-Caprolactone) Mats for Therapeutic Application." Nanomaterials 11, no. 4 (April 4, 2021): 922. http://dx.doi.org/10.3390/nano11040922.

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Diclofenac sodium salt (DSS)-loaded electrospun nanofiber mats on the base of poly(ε-caprolactone) (PCL) were investigated as biocompatible nanofibrous mats for medical applications with the ability to inhibit bacterial infections. The paper presents the characteristics of fibrous mats made by electrospinning and determines the effect of medicament on the fiber morphology, chemical, mechanical and thermal properties, as well as wettability. PCL and DSS-loaded PCL nanofibrous mats were characterized using scanning electron microscopy, transmission electron microscopy, attenuated total reflectance-Fourier transform infrared spectrometry, dynamic mechanical analysis, and contact angle measurements. Electron paramagnetic resonance measurements confirmed the lifetime of DSS before and after application of high voltage during the electrospinning process. In vitro biocompatibility was studied, and it was proved to be of good viability with ~92% of the diploid human cells culture line composed of lung fibroblast (MRC 5) after 48 h of incubation. Moreover, the significant activity of DSS-loaded nanofibers against cancer cells, Ca Ski and HeLa, was established as well. It was shown that 12.5% (m/V) is the minimal concentration for antibacterial activity when more than 99% of Escherichia coli (Gram-negative) and 99% of Staphylococcus aureus (Gram-positive) have been exterminated.
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Dissertations / Theses on the topic "SPI nanofibers"

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Ilic, Natasa, Nektaria Lalangas, Jowan Rostami, and Alexander Wiorek. "Nya material från protein-nanofibrer." Thesis, KTH, Skolan för kemivetenskap (CHE), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-208749.

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Under det här kandidatexamensarbetet har protein-nanofibers påverkan på material undersökts genom att jämföra fibrillerade filmer med ofibrillerade. Sojaproteinisolat fibrillerades under förhållandena pH 2 och 85 ◦C under minst ett dygn och de syntetiserade nanofibrerna analyserades med Thioflavin T (ThT) fluorescens och atomkraftsmikroskopi (AFM). Spektra från analysmetoden ThT fluorescens indikerade på förekomsten av β-flak och analyserna med AFM visade på att fibrerna hade en morfologi som är karakteristisk för protein-nanofibrer. Resultaten antyder att de parametrar som påverkar morfologin hos fibrerna är fibrilleringstid och typ av protein. De gjutna filmerna från fibrillära respektive ofibrillära proteiner var sammanhängande bortsett från vissa sprickor. Värdena på E-modulen från AFM visade att det fibrillerade materialet var mer heterogent än det ofibrillerade. Filmer med sammanhängande yta erhölls vid tillsats av det mjukgörande additivet glycerol. Slutligen, material av både fibrillär och ofibrillär form kan framställas, däremot krävs vidare forskning för att optimera materialens egenskaper.
During this bachelor thesis project, the impact of protein nanofibers on materials has been analysed by comparing films made from fibrillar and non-fibrillar protein. Fibrillation of soy protein isolate was performed during at least 24 hours at pH 2 and a temperature of 85 ◦C. Analysis of the nanofibers was made with Thioflavin T (ThT) fluorescence and atomic force microscopy (AFM). The spectra from ThT Fluorescens indicated the presence of β-sheets and AFM confirmed that the fibrils had a morphology that is characteristic of protein nanofibers. The results indicated that heating time and protein type were the parameters which had the largest impact on the morphology of the fibrils. The synthesised films from both fibrillar and non-fibrillar protein were coherent with exception of some cracks. The elastic modulus from AFM indicated that the fibrillar film was more heterogeneous compared to the non-fibrillar film. To attain coherent films, the plasticising agent glycerol was added. To summarise, both fibrillar as well as non-fibrillar materials were successfully synthesised, however, further research is necessary to optimise the properties of the material.
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François, Sébastien. "Optimisation de la structure textile des prothèses vasculaires pour un développement en monocouche des cellules endotheliales." Phd thesis, Université de Haute Alsace - Mulhouse, 2009. http://tel.archives-ouvertes.fr/tel-00590477.

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Les prothèses vasculaires textiles en polyéthylène téréphtalate (PET) présentent souvent des occlusions après implantation pour les petits diamètres (6-8mm) car la surface des prothèses est peu hémocompatible. Or, l'hémocompatibilité des prothèses serait largement améliorée si ces dernières se recouvraient d'une couche de cellules endothéliales qui tapissent naturellement les vaisseaux sanguins. Ce projet vise à mettre en évidence que les textiles bruts ne sont pas un support viable pour le développement de ces cellules endothéliales, puis propose de remplacer les matrices protéiniques par un recouvrement synthétique. Pour ce faire, de l'acide poly-L-lactique (PLA) solubilisé a été filé sous forme de nanofibres déposées sur la surface luminale de la prothèse. L'étirage par jet d'air a été caractérisé selon un modèle plan, puis adapté à la fon11e tubulaire des prothèses. Les nanofibres ont été évaluées sur le plan de la cytocompatibilité, de l'adhérence et de la prolifération avec un modèle de cellules endothéliales animales. Ce travail vise aussi à optimiser l'adhérence de ces fibres sur le PET par l'emploi d'une technique de modification de surface par plasma. Les résultats montrent qu'il est possible de produire des nanofibres de PLA et de contrôler leur diamètre, et de sceller la paroi de la prothèse textile. Enfin, les cellules endothéliales prolifèrent en monocouche sur des prothèses recouve1tes de nanofibres. Il est possible d'optimiser l'adhérence des nanofibres sur le PET avec un traitement par plasma. En conclusion nous avons proposé une alternative à l'enduction traditionnelle des prothèses permettant la prolifération en monocouche des cellules endothéliales.
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Mbitsi, Hermane. "Synthèse de nanotubes de carbone pour l'obtention de vias d'interconnexions électriques et de drains thermiques." Phd thesis, Université d'Orléans, 2010. http://tel.archives-ouvertes.fr/tel-00637823.

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Les travaux de recherche de ce manuscrit s'inscrivent dans le cadre d'une coopération scientifique avec la société STMicroelectronics de Tours concernant les interconnexions des prochaines générations de circuits intégrés. L'intégration de nanotubes de carbone comme connecteurs en microélectronique de puissance, limiterait sévèrement les effets d'échauffements dans les empilements de puces, permettant une meilleure dissipation de la chaleur. Ce travail de thèse avait pour objectif de déterminer un procédé de croissance reproductible de nanotubes de carbone d'au moins 20 dm de long, en tapis perpendiculaire au substrat, peu pollué par du carbone amorphe afin de réaliser un véhicule test permettant de mesurer les propriétés thermiques et électriques du tapis de nanotubes obtenu. Le dispositif expérimental présenté utilise l'ablation laser pour le dépôt de catalyseur (fer) la méthode de CVD assistée par plasma radiofréquence d'éthylène et d'hydrogène pour la croissance de nanotubes de carbone. Des conditions optimales d'obtention des tapis répondant aux critères de réalisation des démonstrateurs, ont été définies à la suite d'une étude paramétrée. Pour les mesures électriques, des plots d'or servant d'électrodes, sont déposés sur les tapis de nanotubes. Lors des tests électriques 4 pointes sur le démonstrateur réalisé, le comportement ohmique des tapis de nanotubes a été mis en évidence. Une puissance de 300 mW/mm2 est déposée sur les plots sans aucun dommage pour les nanotubes, et une résistivité de l'ordre de 10-3 L.m a été estimée. Pour les tests thermiques, une couche mince de titane absorbant l'énergie d'un faisceau laser UV pulsé représentant la source de chaleur, est déposée sur le tapis de nanotubes. Des valeurs de conductivité thermique apparente de 200 - 300 W/m/K et intrinsèque de 660W/m/K ont été déterminées par méthode de pyrométrie infrarouge résolue en temps.
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Plachá, Monika. "Příprava a využití nanočástic a nanovláken s přírodními UV filtry." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2018. http://www.nusl.cz/ntk/nusl-376846.

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The presented diploma thesis is focused on preparation of nanoparticles and nanofibres with natural UV filters. Liposomes with encapsulated aqueous, ethanol and lipid extracts were prepared. Nanofibers from PHB containing lipid extract were prepared too. As a part of this work, an overview of natural sources with potential effects as UV filters were introduced. Moreover, nanoparticles and nanofibers and methods of their characterization were described. Size, polydisperse index and colloid stability of prepared nanoparticles were characterized via DLS. In experimental part aqueous, ethanol and lipid extracts were prepared from roasted coffee, green coffee and cascara. These extracts were spectrophotometrically characterized for the content of polyphenols, flavonoids, antioxidant activity, tannins and their SPF. Liposomes and liposomes containing PHB with these extracts were prepared and the encapsulation effectivity, short–term and long–term stability as well as SPF of nanoparticles were determined. Nanofibers from PHB containing lipid extracts were prepared via electrospinning and forcespinning methods. Prepared nanofibers were examined via FTIR–ATR. Antioxidant activity, short–term and long–term stability were determined spectrophotometrically. From selected nanoparticles, emulsions and gels were prepared and their SPF was also determined. Three types of emulsions with the best SPF were selected and tested on volunteers. Sedimentation stability of emulsions was tested by analytical centrifuge. Finally, cytotoxicity of selected nanoparticles and nanofibers was tested via MTT assay using human keratinocytes.
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Books on the topic "SPI nanofibers"

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Pivec, Tanja, Tamilselvan Mohan, Rupert Kargl, Manja Kurečič, and Karin Stana Kleinschek. Design, Characterisation and Applications of Cellulose-Based Thin Films, Nanofibers and 3D Printed Structures: A Laboratory Manual. University of Maribor Press, 2021. http://dx.doi.org/10.18690/978-961-286-432-3.

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The introduction of the Laboratory Manual gives the theoretical bases on cellulose and its derivatives, which are used as starting polymers for the preparation of multifunctional polymers with three different advanced techniques - spin coating, electrospinning and 3D printing. In the following, each technique is presented in a separate Lab Exercise. Each exercise covers the theoretical basics on techniques for polymer processing and methods for their characterisation, with an emphasis on the application of prepared materials. The experimental sections contain all the necessary information needed to implement the exercises, while the added results provide students with the help to implement correct and successful exercises and interpret the results.
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Conference papers on the topic "SPI nanofibers"

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El-Ashry, Mostafa M., Kareem M. Gouda, and Henry Daniel Young. "Production of Polymer Nanofibers by Wet Spinning." In ASME 2008 2nd Multifunctional Nanocomposites and Nanomaterials International Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/mn2008-47030.

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Polymer nanofibers are attractive in many engineering and medical applications because of its distinctive mechanical, chemical, and electrical properties typically evident in nanomaterials. Some applications are liquid & particle filters, composites, surgical masks, sensors. We propose a fibre fabrication method that can produce continuous polymer nanofibres with submicron cross-section. This technique can spin fibres from precursor rheologies that would be considered “unspinnable” by any other current method. As such, this technique may allow the fabrication of novel fibre structures, assist in the fabrication of nanofibers from new materials, and allow the use of novel chemical routes in fibre spinning.
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Tan, E. P. S., and C. T. Lim. "Nanomechanical testing of polymeric nanofibers." In SPIE Proceedings, edited by Jose F. Lopez, Chenggen Quan, Fook Siong Chau, Francisco V. Fernandez, Jose Maria Lopez-Villegas, Anand Asundi, Brian Stephen Wong, Jose M. de la Rosa, and Chwee Teck Lim. SPIE, 2005. http://dx.doi.org/10.1117/12.621921.

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Liedl, C., S. Pucher, S. Jin, A. Rauschenbeutel, and P. Schneeweiss. "Non-Reciprocal Amplification of Light Using Cold Atoms Coupled to a Nanophotonic Waveguide." In Quantum 2.0. Washington, D.C.: Optica Publishing Group, 2022. http://dx.doi.org/10.1364/quantum.2022.qth4c.2.

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We experimentally demonstrate non-reciprocal Raman amplification of light using atoms coupled to a nanofiber by employing the spin-momentum locking inherent to this system. Furthermore, we can set the amplification direction by the spin state in which the atoms are prepared.
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4

Götze, Marco, Olaf Krimig, Tobias Kürbitz, Sven Henning, Andreas Heilmann, and Georg Hillrichs. "Picosecond laser ablation of polyamide electrospun nanofibers." In SPIE LASE, edited by Alexander Heisterkamp, Peter R. Herman, Michel Meunier, and Roberto Osellame. SPIE, 2017. http://dx.doi.org/10.1117/12.2252312.

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Lam, Hwee M., Ming Hui Hong, Chee Lip Gan, and Tow Chong Chong. "Synthesis, characterization, and photoluminescence of β-Ga2O3 nanofibers." In SPIE Proceedings, edited by Isamu Miyamoto, Henry Helvajian, Kazuyoshi Itoh, Kojiro F. Kobayashi, Andreas Ostendorf, and Koji Sugioka. SPIE, 2004. http://dx.doi.org/10.1117/12.595829.

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Ishii, Yuya, Ryohei Kaminose, and Mitsuo Fukuda. "Waveguiding properties of individual electrospun polymer nanofibers." In SPIE Organic Photonics + Electronics, edited by Manfred Eich, Jean-Michel Nunzi, and Rachel Jakubiak. SPIE, 2013. http://dx.doi.org/10.1117/12.2022813.

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Robles-García, Joshua L., Anamaris Meléndez, Douglas Yates, Jorge J. Santiago-Avilés, Idalia Ramos, and Eva M. Campo. "Transmission electron microscopy of electrospun GaN nanofibers." In SPIE Defense, Security, and Sensing, edited by Michael T. Postek, Dale E. Newbury, S. Frank Platek, David C. Joy, and Tim K. Maugel. SPIE, 2011. http://dx.doi.org/10.1117/12.885543.

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Kostiucenko, O., J. Fiutowski, J. R. Brewer, and H. G. Rubahn. "Field-enhanced nonlinear optical properties of organic nanofibers." In SPIE Photonics Europe, edited by Benjamin J. Eggleton, Alexander L. Gaeta, Neil G. R. Broderick, Alexander V. Sergienko, Arno Rauschenbeutel, and Thomas Durt. SPIE, 2014. http://dx.doi.org/10.1117/12.2051968.

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Meléndez, Anamaris, Kristle Morales, Idalia Ramos, Eva Campo, and Jorge J. Santiago-Avilés. "Synthesis and characterization of electrospun gallium nitride nanofibers." In SPIE NanoScience + Engineering, edited by Elizabeth A. Dobisz and Louay A. Eldada. SPIE, 2009. http://dx.doi.org/10.1117/12.825368.

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Heylman, Kevin D., Kassandra A. Knapper, Erik H. Horak, and Randall H. Goldsmith. "Photothermal imaging of individual carbon nanofibers with optical microresonators." In SPIE BiOS, edited by Jörg Enderlein, Ingo Gregor, Zygmunt K. Gryczynski, Rainer Erdmann, and Felix Koberling. SPIE, 2015. http://dx.doi.org/10.1117/12.2080056.

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