نتایج جستجو برای: nanofiber

تعداد نتایج: 4098  

2016
Huanfeng Jiao Xiaoliang Zhao Chunxiao Lv Yijun Wang Dongjiang Yang Zhenhuan Li Xiangdong Yao

One-dimensional γ-Al2O3 nanofibers were modified with Nb2O5 to be used as an efficient heterogeneous catalyst to catalyze biomass into 5-hydroxymethylfurfural (5-HMF). At low Nb2O5 loading, the niobia species were well dispersed on γ-Al2O3 nanofiber through Nb-O-Al bridge bonds. The interaction between Nb2O5 precursor and γ-Al2O3 nanofiber results in the niobia species with strong Lewis acid si...

2016
Joong-Hyun Kim Min Sil Kang Mohamed Eltohamy Tae-Hyun Kim Hae-Won Kim

Complete reconstruction of damaged periodontal pockets, particularly regeneration of periodontal ligament (PDL) has been a significant challenge in dentistry. Tissue engineering approach utilizing PDL stem cells and scaffolding matrices offers great opportunity to this, and applying physical and mechanical cues mimicking native tissue conditions are of special importance. Here we approach to re...

2004
M. Joshi

Conventional carbon fiber reinforced phenolic resins are widely used to prepare carbon/carbon composites due to their high carbon yield. Property enhancement of carbon fabric/phenolic composites is possible through carbon nanomaterial dispersion in the matrix. The effect of carbon nanofiber dispersion in phenolic resins/carbon fabric composites was investigated. The dispersion efficiency in dif...

2012
Yuuki Sueyoshi Takeshi Hashimoto

Nanofiber membranes for chiral separation were prepared from chitin, which is the most abundant natural amino polysaccharide. The membrane showed chiral separation ability by adopting concentration gradient as a driving force for membrane transport. In other words, the chitin nanofiber membrane selectively transported the D-isomer of glutamic acid (Glu), phenylalanine (Phe), and lysine (Lys) fr...

Journal: :Biomaterials 2012
Sharon J Sequeira David A Soscia Basak Oztan Aaron P Mosier Riffard Jean-Gilles Anand Gadre Nathaniel C Cady Bülent Yener James Castracane Melinda Larsen

Nanofiber scaffolds have been useful for engineering tissues derived from mesenchymal cells, but few studies have investigated their applicability for epithelial cell-derived tissues. In this study, we generated nanofiber (250 nm) or microfiber (1200 nm) scaffolds via electrospinning from the polymer, poly-l-lactic-co-glycolic acid (PLGA). Cell-scaffold contacts were visualized using fluorescen...

Journal: :Nanomedicine 2010
Ana Guimarães Albino Martins Elisabete D Pinho Susana Faria Rui L Reis Nuno M Neves

AIM Utilize the dual composition strategy to increase the pore size and solve the low cell infiltration capacity on random nanofiber meshes, an intrinsic limitation of electrospun scaffolds for tissue engineering applications. MATERIALS & METHODS Polycaprolactone and poly(ethylene oxide) solutions were electrospun simultaneously to obtain a dual composition nanofiber mesh. Selective dissoluti...

Journal: :Biomaterials 2008
Xiao-Tao Li Yan Zhang Guo-Qiang Chen

Polyhydroxyalkanoates (PHAs) have been demonstrated to be a family of biopolymers with good biodegradability and biocompatibility. To mimic the real microenvironment of extracellular matrix (ECM) for cell growth, novel nanofiber matrices based on PHA polymers were prepared via a phase separation process. Three-dimensional interconnected fibrous networks were observed in these matrices with aver...

Journal: :Nanoscale 2014
Yiwu Qian Guowen Meng Qing Huang Chuhong Zhu Zhulin Huang Kexi Sun Bin Chen

We report on a synthetic approach to produce self-supported flexible surface-enhanced Raman scattering (SERS) active membranes consisting of polyamide (PA) nanofibers grafted with vertical Ag-nanosheets, via a combinatorial process of electrospinning PA-nanofiber membranes, assembling Au-nanoparticles on the PA-nanofibers as seeds for subsequent growth of Ag-nanosheets, and electrodepositing Ag...

Journal: :Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 2014
Stefan Baj Tomasz Krawczyk Natalia Pradel Md Golam Azam Takayuki Shibata Shpend Dragusha Krzysztof Skutil Miroslawa Pawlyta Masaaki Kai

A carbon nanofiber-based luminol-biotin probe was synthesized for the sensitive chemiluminescence (CL) detection of a target protein by grafting luminol and biotin onto an oxidized carbon nanofiber. This carbon nanofiber was prepared by chemical vapor-deposition with methane in the presence of the Ni-Cu-MgO catalyst, which was followed by oxidization with HNO3-H2SO4 to produce a carboxyl group ...

Journal: :Brazilian oral research 2014
Valdirene Alves dos Santos Patricia Verônica Aulestia Viera Adriano Marim de Oliveira Maria Helena Ambrosio Zanin Maria Aparecida Borsatti

It is known that cetylpyridinium chloride (CPC) has in vitro and in vivo antifungal action against Candida albicans, with advantages over other common antiseptics. A CPC delivery-controlled system, transported in polymer nanofibers (PVP/PMMA), was developed to increase the bioavailability of the drug in contact with the oral mucosa. The objectives of this study were to determine if CPC in nanof...

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