نتایج جستجو برای: continuous electrospinning

تعداد نتایج: 264804  

2016
Qiao Xie Lie-Ni Jia Hong-Yu Xu Xiang-Gang Hu Wei Wang Jun Jia

Bone tissue engineering is the most promising technology for enhancing bone regeneration. Scaffolds loaded with osteogenic factors improve the therapeutic effect. In this study, the bioactive PEI (polyethylenimine)/pBMP2- (bone morphogenetic protein-2 plasmid-) PLGA (poly(D, L-lactic-co-glycolic acid)) core-shell scaffolds were prepared using coaxial electrospinning for a controlled gene delive...

2012
Laura Taajamaa Eero Kontturi Janne Laine Orlando J. Rojas

Morphologies featured in bicomponent 2D ultrathin films were reproduced on 3D non-woven microfibre structures. Fibre networks were constructed by electrospinning hydrophobised cellulose derivatives, trimethylsilyl cellulose (TMSC) and cellulose triacetate (CTA), dissolved in a common solvent. Diverse morphologies were obtained depending on the polymer blend ratio: electrospinning of TMSC produc...

2017
Jian Fang Xungai Wang Tong Lin

With the rapid development of nanoscience and nanotechnology over the last two decades, great progress has been made not only in preparation and characterization of nanomaterials, but also in their functional applications. As an important one-dimensional nanomaterial, nanofibers have extremely high specific surface area because of their small diameters, and nanofiber membranes are highly porous...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شاهد - دانشکده دندانپزشکی 1394

مقدمه و هدف : از زمانی که خواص فیزیکی ni-ti در سال 1988 شرح داده شده است، فایل های روتاری نیکل-تیتانیوم (ni-ti) به طور گسترده در درمان های اندودنتیک استفاده می شوند. این فایل ها مزایای زیادی نسبت به فایل های استنلس استیل (stainless steel) دارند. علی رغم این مزایا به نظر می رسد فایل های ni-ti نسبت به شکستن آسیب پذیرتر هستند. اخیرا فایل های نیکل تیتانیوم reciprocating معرفی شده ادعا می کنند مقاوم...

Journal: :Biotechnology and bioengineering 2014
Ho-Wang Tong Baris R Mutlu Lawrence P Wackett Alptekin Aksan

Recombinant Escherichia coli (E. coli) cells were successfully encapsulated in reactive membranes comprised of electrospun nanofibers that have biocompatible polyvinyl alcohol (PVA)-based cores entrapping the E. coli and silica-based, mechanically sturdy porous shells. The reactive membranes were produced in a continuous fashion using a coaxial electrospinning system coupled to a microfluidic t...

Journal: Journal of Nanoanalysis 2019
abolfazl mozaffari, Masoud Parsania Mazeyar Gashti Mohammad Jalili

Electrospinning has been recognized as an efficient technique for the fabrication of polymernanofibers. Recently, various polymers have successfully been electrospun into ultrafine fibers.Electrospinning is an extremely promising method for the preparation of tissue engineering scaffolds.In this study, nanofibers gelatin was electrospun at 20% v/v optimized content. To produce...

2012
Fatma YENER Oldrich JIRSAK

Effect of nonsolvent in the polymer (polyvinyl butyral) solution in ethanol on the electrospinning performance and nanofiber properties was investigated. Water as the nonsolvent was added in various amounts to the polymer solution. Addition of water did influence neither surface tension nor conductivity of polymer solution significantly. On the other hand, it increased its viscosity. The perfor...

2009
Wan-Yu Wu Jyh-Ming Ting Po-Jung Huang

ZnO nanowires were produced using an electrospinning method and used in gas sensors for the detection of ethanol at 220 °C. This electrospinning technique allows the direct placement of ZnO nanowires during their synthesis to bridge the sensor electrodes. An excellent sensitivity of nearly 90% was obtained at a low ethanol concentration of 10 ppm, and the rest obtained at higher ethanol concent...

Journal: :jundishapur journal of natural pharmaceutical products 0
abbas akhgari targeted drug delivery research center, school of pharmacy, mashhad university of medical sciences, mashhad, ir iran abdolmaohammad ghalambor dezfuli physics department, shahid chamran university, ahvaz, ir iran mohammadebrahim rezaei physics department, shahid chamran university, ahvaz, ir iran mohammad kiarsi nanotechnology research center, school of pharmacy, ahvaz jundishapur university of medical sciences, ahvaz, ir iran mohammadreza abbaspour targeted drug delivery research center, school of pharmacy, mashhad university of medical sciences, mashhad, ir iran; targeted drug delivery research center, school of pharmacy, mashhad university of medical sciences, mashhad, ir iran. tel/fax: +98-5138823251

results the results showed that the fiber diameter and the amount of loratadine affected the drug release and the disappearance time of nanofibers. the smaller the fiber diameter and drug amount, the faster the solubility and the release time of nanofibers. conclusions it was concluded that electrospinning can be a suitable method for preparing fast-dissolving loratadine nanofibers. materials a...

Journal: :nanomedicine research journal 0
safieh boroumand department of medical nanotechnology, school of advanced technology in medicine, tehran university of medical science, tehran, iran sara hosseini department of biotechnology, school of advanced technologies in medicine, shahid beheshti university of medical sciences, tehran, iran mohhamad salehi department of biotechnology, school of advanced technologies in medicine, shahid beheshti university of medical sciences, tehran, iran reza faridi majidi department of medical nanotechnology, school of advanced technology in medicine, tehran university of medical science, tehran, iran

objectives: postsurgical adhesion is one of the common complications after surgery. some anti-adhesion barriers are commercially available which are not customary used by physicians as much as expected because of ineffectiveness. recently, nanofibers have been introduced as anti-adhesion barriers with the potential of drug delivery. in the light of role of inflammation and oxidative stress in a...

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