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https://www.readbyqxmd.com/read/28350666/long-term-comparison-between-human-normal-conchal-and-microtia-chondrocytes-regenerated-by-tissue-engineering-on-nanofiber-polyglycolic-acid-scaffolds
#1
Hitomi Nakao, Robin D Jacquet, Mark Shasti, Noritaka Isogai, Ananth S Murthy, William J Landis
BACKGROUND: Previous regeneration studies of auricle-shaped cartilage by tissue engineering leave unresolved whether the chondrocyte phenotype from human auricular chondrocytes seeded onto polymeric scaffolds is retained over the long term and whether microtia remnants may be a viable cell source for auricular reconstruction. METHODS: Chondrocytes were isolated from human ears, either normal conchal ear or microtia cartilage remnants, expanded in vitro, and seeded onto nanoscale-diameter polyglycolic acid sheets...
April 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28350456/starch-derived-nano-graphene-oxide-paves-the-way-for-electrospinnable-and-bioactive-starch-scaffolds-for-bone-tissue-engineering
#2
Duo Wu, Archana Samanta, Rajiv K Srivastava, Minna Hakkarainen
A straightforward process that enabled electrospinning of bioactive starch-based nanofiber scaffolds was developed by utilizing starch derived nano graphene oxide (nGO) as a property enhancer and formic acid as a solvent and esterification reagent. The reaction mechanism and process were followed by detailed spectroscopic investigation. Furthermore, the incorporation of nGO as a "green bioactive additive" endorsed starch nanofibrous scaffolds several advantageous functionalities including improved electrospinnability and thermal stability, good cytocompatibility, osteo-bioactivity, and retained biodegradability...
March 28, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/28350431/cellulose-nanofibers-cnf-from-softwood-hardwood-and-tunicate-preparation-structure-film-performance-interrelation
#3
Yadong Zhao, Carl Moser, Mikael E Lindstrom, Gunnar Henriksson, Jiebing Li
This work reveals the structural variations of cellulose nanofibers (CNF) prepared from different cellulose sources, softwood (Picea abies), hardwood (E. grandis x E. urophylla) and tunicate (Ciona intestinalis), using different preparation processes, and their correlations to the formation and performance of the films prepared from the CNF. Here the CNF are prepared from wood chemical pulps and tunicate isolated cellulose by an identical homogenization treatment subsequent to either an enzymatic hydrolysis or a 2,2,6,6-tetramethylpiperidinyl-1-oxyl (TEMPO)-mediated oxidation...
March 28, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28346739/a-novel-approach-to-limit-chemical-deterioration-of-gilthead-sea-bream%C3%A2-sparus-aurata-%C3%A2-fillets-coating-with-electrospun-nanofibers-as-characterized-by-molecular-thermal-and-microstructural-properties
#4
Zafer Ceylan, Gulgun F Unal Sengor, Mustafa Tahsin Yilmaz
Coating of sea bream fillets with thymol loaded chitosan based electrospun nanofibers (TLCN) and chitosan based nanafibers (CN) has been presented a novel approach to delay chemical deterioration. We assessed CN and TLCN with respect of scanting of total volatile basic nitrogen (TVBN), trimethylamine (TMA), thiobarbituric acid (TBA) deterioration during cold storage condition. Electrospinning process was applied to obtain TLCN and CN. Both of nanofibers obtained from biopolymer and bioactive material were cylindrical, smooth, beadless...
March 27, 2017: Journal of Food Science
https://www.readbyqxmd.com/read/28345919/photocontrol-of-clustering-retaining-and-releasing-of-microbeads-concomitant-with-phototransformation-of-supramolecular-architecture-of-amphiphilic-diarylethene
#5
Akira Sakaguchi, Kenji Higashiguchi, Hajime Yotsuji, Kenji Matsuda
Photoinduced clustering of polystyrene microbeads and photocontrol of their diffusion was achieved in water with the assistance of photoinduced transformation of supramolecular architecture of amphiphilic diarylethene between sphere and fiber states. When a suspension of polystyrene beads containing the sphere state of diarylethene was UV-irradiated from beneath, clustering of the polystyrene beads by thermal convection was observed. The velocity of clustering was dependent on the amount of photogenerated nanofibers that determines the viscosity of the water...
March 27, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28345589/rational-design-of-1-d-co3o4-nanofibers-low-content-graphene-composite-anode-for-high-performance-li-ion-batteries
#6
Su-Ho Cho, Ji-Won Jung, Chanhoon Kim, Il-Doo Kim
Cobalt oxide that has high energy density, is the next-generation candidate as the anode material for LIBs. However, the practical use of Co3O4 as anode material has been hindered by limitations, especially, low electrical conductivity and pulverization from large volume change upon cycling. These features lead to hindrance to its electrochemical properties for lithium-ion batteries. To improve electrochemical properties, we synthesized one-dimensional (1-D) Co3O4 nanofibers (NFs) overed with reduced graphene oxide (rGO) sheets by electrostatic self-assembly (Co3O4 NFs@rGO)...
March 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28345094/a-metal-organic-framework-devised-co-n-doped-carbon-microsphere-nanofiber-hybrid-as-a-free-standing-3d-oxygen-catalyst
#7
Wenxiu Yang, Xiangjian Liu, Lulu Chen, Liang Liang, Jianbo Jia
A Co-N doped 3D carbon microsphere/nanofiber hybrid was produced by electrospinning. We can effectively control the morphology transformation from a pearl necklace-like nanofiber to a microsphere/nanofiber hybrid. The hybrid shows Pt-like oxygen reduction reaction activity both in acidic and basic solutions, making it one of the best non-noble metal oxygen catalysts.
March 27, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28342024/towards-optimization-of-odonto-osteogenic-bioengineering-in-vitro-comparison-of-simvastatin-sodium-fluoride-melanocyte-stimulating-hormone
#8
Vahid Zijah, Roya Salehi, Marziyeh Aghazadeh, Mohammad Samiei, Effat Alizadeh, Soodabeh Davaran
Tissue engineering has emerged as a potential therapeutic option for dental problems in recent years. One of the policies in tissue engineering is to use both scaffolds and additive factors for enhancing cell responses. This study aims to evaluate and compare the effect of three types of biofactors on poly-caprolactone-poly-ethylene glycol-poly caprolactone (PCL-PEG-PCL) nanofibrous scaffold on human dental pulp stem cell (hDPSCs) engineering. The PCL-PEG-PCL copolymer was synthesized with ring opening polymerization method, and its nanofiber scaffold was prepared by electrospinning method...
March 25, 2017: In Vitro Cellular & Developmental Biology. Animal
https://www.readbyqxmd.com/read/28341173/preparation-and-characterization-of-reinforced-papers-using-nano-bacterial-cellulose
#9
Taghi Tabarsa, Somayeh Sheykhnazari, Alireza Ashori, Mahd Mashkour, Abolghasem Khazaeian
The main goal of this work was to reinforce softwood pulp (SP) with bacterial cellulose (BC) to generate a sustainable biocomposite. BC is a nanocellulose, which was anticipated to increase interfacial adhesion between the cellulosic fibers and BC. The organism used was Gluconacetobacter xylinus, which was incubated in a static Hestrin-Schramm culture at 28°C for 14 days. The specimens of BC, SP and the reinforced SP with BC were characterized using X-ray diffraction (XRD), FT-IR, FESEM, and physico-mechanical testing...
March 21, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28340772/vanadium-doped-tin-oxide-porous-nanofibers-enhanced-responsivity-for-hydrogen-detection
#10
Xiuru Xu, Min Yin, Na Li, Wei Wang, Bolun Sun, Ming Liu, Dongwei Zhang, Zhenyu Li, Ce Wang
Vanadium (V)-doped tin oxide (SnO2) one-dimensional porous nanofibers (PNFs) were fabricated for the hydrogen detection application. V-doping changes the distances of different facets of the SnO2 crystal in different roles, and therefore deform or distort the SnO2 structure. The modulation effects of V(4+) and V(5+) on hydrogen detecting performance were discussed. With a suitable amount of V-doping, the porous SnO2 nanofibers exhibits ~66% increase of response sensitivity, 33% faster in response (2s) and 50% faster in recovery time (1s), comparing with undoped SnO2 nanofibers...
May 15, 2017: Talanta
https://www.readbyqxmd.com/read/28340522/tin-oxide-carbon-coated-sepiolite-nanofibers-with-enhanced-lithium-ion-storage-property
#11
Kai Hou, Xin Wen, Peng Yan, Aidong Tang, Huaming Yang
Natural sepiolite (Sep) nanofibers were coated with carbon and nanoscale SnO2 to prepare an emerging nanocomposite (SnO2-C@Sep), which exhibited enhanced electrochemical performance. Sepiolite could act as a steady skeleton, carbon coating principally led sepiolite from an isolated to an electric state, and decoration of nanoscale SnO2 was beneficial to the functionization of sepiolite. Cycling performances indicated that SnO2-C@Sep showed higher discharge capacities than commercial SnO2 after 50 cycles. The nanocomposite SnO2-C@Sep possessed enhanced lithium storage properties with stable capacity retention and low cost, which could open up a new strategy to synthesize a variety of functional hybrid materials based on the cheap and abundant clay and commercialization of lithium-metal oxide batteries...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28338419/competitive-protein-binding-influences-heparin-based-modulation-of-spatial-growth-factor-delivery-for-bone-regeneration
#12
Marian H Hettiaratchi, Catherine Chou, Nicholas Servies, Johanna M Smeekens, Albert Cheng, Camden Esancy, Ronghu Wu, Todd C McDevitt, Robert E Guldberg, Laxminarayanan Krishnan
Tissue engineering strategies involving the in vivo delivery of recombinant growth factors are often limited by the inability of biomaterials to spatially control diffusion of the delivered protein within the site of interest. The poor spatiotemporal control provided by porous collagen sponges, which are used for the clinical delivery of bone morphogenetic protein-2 (BMP-2) for bone regeneration, has necessitated the use of supraphysiological protein doses, leading to inflammation and heterotopic ossification...
March 24, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28338328/polysulfide-breathing-dual-conductive-heterolayered-battery-separator-membranes-based-on-0d-1d-mingled-nanomaterial-composite-mats
#13
Jeong-Hoon Kim, Gwan Yeong Jung, Yong-Hyeok Lee, Jung-Hwan Kim, Sun-Young Lee, Sang Kyu Kwak, Sang-Young Lee
Facile/sustainable utilization of sulfur active materials is an ultimate challenge in high-performance lithium-sulfur (Li-S) batteries. Here, as a membrane-driven approach to address this issue, we demonstrate a new class of polysulfide-breathing (capable of reversibly adsorbing and desorbing polysulfides)/dual (electron and ion)-conductive, heterolayered battery separator membranes (denoted as "MEC-AA separators") based on 0D (nanoparticles)/1D (nanofibers) composite mats. The MEC-AA separator is fabricated through an in-series, concurrent electrospraying/electrospinning process...
March 24, 2017: Nano Letters
https://www.readbyqxmd.com/read/28336894/fabrication-of-functional-polyurethane-rare-earth-nanocomposite-membranes-by-electrospinning-and-its-vocs-absorption-capacity-from-air
#14
Jun Cong Ge, Nag Jung Choi
Volatile organic compounds (VOCs) are a source of air pollution and are harmful to both human health and the environment. In this study, we fabricated polyurethane/rare earth (PU/RE) composite nanofibrous membranes via electrospinning with the aim of removing VOCs from air. The morphological structure of PU/RE nanofibrous mats was investigated using field emission scanning electron microscopy (FE-SEM), fourier transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD) experimental analyses. A certain amount of RE (up to 50 wt...
March 11, 2017: Nanomaterials
https://www.readbyqxmd.com/read/28336876/recent-advances-in-research-on-the-synthetic-fiber-based-silica-aerogel-nanocomposites
#15
REVIEW
Agnieszka Ślosarczyk
The presented paper contains a brief review on the synthesis and characterization of silica aerogels and its nanocomposites with nanofibers and fibers based on a literature study over the past twenty years and my own research. Particular attention is focused on carbon fiber-based silica aerogel nanocomposites. Silica aerogel is brittle in nature, therefore, it is necessary to improve this drawback, e.g., by polymer modification or fiber additives. Nevertheless, there are very few articles in the literature devoted to the synthesis of silica aerogel/fiber nanocomposites, especially those focusing on carbon fibers and nanofibers...
February 16, 2017: Nanomaterials
https://www.readbyqxmd.com/read/28336850/influence-of-solution-properties-and-process-parameters-on-the-formation-and-morphology-of-ysz-and-nio-ceramic-nanofibers-by-electrospinning
#16
Gerard Cadafalch Gazquez, Vera Smulders, Sjoerd A Veldhuis, Paul Wieringa, Lorenzo Moroni, Bernard A Boukamp, Johan E Ten Elshof
The fabrication process of ceramic yttria-stabilized zirconia (YSZ) and nickel oxide nanofibers by electrospinning is reported. The preparation of hollow YSZ nanofibers and aligned nanofiber arrays is also demonstrated. The influence of the process parameters of the electrospinning process, the physicochemical properties of the spinning solutions, and the thermal treatment procedure on spinnability and final microstructure of the ceramic fibers was determined. The fiber diameter can be varied from hundreds of nanometers to more than a micrometer by controlling the solution properties of the electrospinning process, while the grain size and surface roughness of the resulting fibers are mainly controlled via the final thermal annealing process...
January 13, 2017: Nanomaterials
https://www.readbyqxmd.com/read/28335371/synthesis-of-antifungal-agents-from-xanthene-and-thiazine-dyes-and-analysis-of-their-effects
#17
Joo Ran Kim, Stephen Michielsen
Indoor fungi growth is an increasing home health problem as our homes are more tightly sealed. One thing that limits durability of the antifungal agents is the scarcity of reactive sites on many surfaces to attach these agents. In order to increase graft yield of photosensitizers to the fabrics, poly(acrylic acid-co-styrene sulfonic acid-co-vinyl benzyl rose bengal or phloxine B) were polymerized and then grafted to electrospun fabrics. In an alternative process, azure A or toluidine blue O were grafted to poly(acrylic acid), which was subsequently grafted to nanofiber-based and microfiber-based fabrics...
December 20, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28335353/the-chemical-deposition-method-for-the-decoration-of-palladium-particles-on-carbon-nanofibers-with-rapid-conductivity-changes
#18
Hoik Lee, Duy-Nam Phan, Myungwoong Kim, Daewon Sohn, Seong-Geun Oh, Seong Hun Kim, Ick Soo Kim
Palladium (Pd) metal is well-known for hydrogen sensing material due to its high sensitivity and selectivity toward hydrogen, and is able to detect hydrogen at near room temperature. In this work, palladium-doped carbon nanofibers (Pd/CNFs) were successfully produced in a facile manner via electrospinning. Well-organized and uniformly distributed Pd was observed in microscopic images of the resultant nanofibers. Hydrogen causes an increment in the volume of Pd due to the ability of hydrogen atoms to occupy the octahedral interstitial positions within its face centered cubic lattice structure, resulting in the resistance transition of Pd/CNFs...
November 29, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28335334/hybrid-nanostructures-containing-sulfadiazine-modified-chitosan-as-antimicrobial-drug-carriers
#19
Bogdanel Silvestru Munteanu, Raluca Petronela Dumitriu, Lenuta Profire, Liviu Sacarescu, Gabriela Elena Hitruc, Elena Stoleru, Marius Dobromir, Ana Lavinia Matricala, Cornelia Vasile
Chitosan (CH) nanofibrous structures containing sulfadiazine (SDZ) or sulfadiazine modified chitosan (SCH) in the form of functional nanoparticles attached to nanofibers (hybrid nanostructures) were obtained by mono-axial and coaxial electrospinning. The mono-axial design consisted of a SDZ/CH mixture solution fed through a single nozzle while the coaxial design consisted of SCH and CH solutions separately supplied to the inner and outer nozzle (or in reverse order). The CH ability to form nanofibers assured the formation of a nanofiber mesh, while SDZ and SCH, both in form of suspensions in the electrospun solution, assured the formation of active nanoparticles which remained attached to the CH nanofiber mesh after the electrospinning process...
November 10, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28335317/cytotoxicity-of-silver-nanoparticle-and-chitin-nanofiber-sheet-composites-caused-by-oxidative-stress
#20
Jun Kinoda, Masayuki Ishihara, Hidemi Hattori, Shingo Nakamura, Koichi Fukuda, Hidetaka Yokoe
Size-controlled spherical silver nanoparticles (<10 nm) and chitin-nanofiber sheet composites (Ag NPs/CNFS) have previously been reported to have strong antimicrobial activity in vitro. Although Ag NPs/CNFS have strong antimicrobial activity, their cytotoxicity has not been investigated. This study was performed to evaluate the effects of Ag NPs/CNFS on cytotoxicity for fibroblasts in vitro and healing delay of wound repair in vivo, focused on oxidative stress. Cytotoxic activities of Ag NPs/CNFS were investigated using a fibroblast cell proliferation assay, nitric oxide/nitrogen dioxide (NO/NO₂) measurement of the cell lysates in vitro, inhibitory effects of Ag NPs/CNFS on healing-impaired wound repair using diabetic mice in vivo, 8-hydroxy-2'-deoxyguanosine (8-OHdG) immunohistochemical staining of the skin sections, and generation of carbonyl protein in the wound was performed to evaluate cytotoxicity with oxidative stress...
October 20, 2016: Nanomaterials
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