نتایج جستجو برای: polyvinylpyrrolydone pvp

تعداد نتایج: 2767  

Journal: :nanomedicine journal 0
raheleh faridi-majidi nanotechnology and advanced materials department, materials and energy research center, karaj, alborz, iran nader nezafati nanotechnology and advanced materials department, materials and energy research center, karaj, alborz, iran mohammad pazouki nanotechnology and advanced materials department, materials and energy research center, karaj, alborz, iran saeed hesaraki nanotechnology and advanced materials department, materials and energy research center, karaj, alborz, iran

objective(s): three-dimensional structures such as nanofibrous scaffolds are being used in biomedical engineering as well as provide a site for cells to attach and proliferate leading to tissue formation. in the present study, poly(vinyl pyrrolidone) (pvp)/ poly(vinyl alcohol)(pva) hybrid nanofibrous scaffold was synthesized by electrospinning. materials and methods: the effect of adding nano h...

Journal: :Journal of Nippon Medical School = Nippon Ika Daigaku zasshi 2007
Ryouhei Futami Kimiyoshi Shimanuki Atsushi Sugiura Yoshikazu Tsuchiya Masahiro Kaneko Keiichi Okawa Sho Mineta Yoshihiko Sugiyama Koho Akimaru Takashi Tajiri

Recurrence at the site of a stapled anastomosis is generally believed to result from the luminal implantation of viable cancer cells during stapling. We report a case in which colon cancer recurred twice at the site of a stapled anastomosis, despite povidone iodine (PVP-I) lavage consisting of an enema with 5% PVP-I solution before the operation and intraoperative lavage of the rectal remnant a...

2014
Long-De Wang Tong Zhang Xiao-Yang Zhang Yuan-Jun Song Ruo-Zhou Li Sheng-Qing Zhu

The nanocomposite polyvinyl pyrrolidone (PVP) films containing Ag nanoparticles and Rhodamine 6G are prepared on the two-dimensional distinctive continuous ultrathin gold nanofilms. We investigate the optical properties and the fluorescence properties of silver nanoparticles-PVP polymer composite films influenced by Ag nanoparticles and Au nanoparticles. Absorption spectral analysis suggests th...

2012
Niladri Roy Nabanita Saha Takeshi Kitano Petr Saha

□ The medicated hydrogels were prepared aseptically under moist heat treatment using polyvinylpyrrolidone (PVP), sodium-carboxymethylcellulose (CMC), polyethyleneglycol (PEG), agar, glycerin and/or boric acid (BA) and designated as PVP-CMC and PVP-CMC-BA. The aim of this study was to develop some medicinal values-based hydrogels. BA was used to build up the medicinal values (antiseptic and anti...

Journal: :The British journal of ophthalmology 1998
T Malet B Challier N David A Bertrand J L George

BACKGROUND/AIM Isolated stenosis of the lacrimal punctum is a frequent cause of epiphora. Treatment relies on surgical opening or dilatation with bi- or monocanalicular prosthesis. Recently, silicone perforated punctum plugs (PPP) were proposed. The drawback with these silicone PPP was that secretions accumulate in the central orifice blocking the spontaneous flow of tears. A modification of th...

2016
Seong Jin Baek Hahck Soo Park Eun Young Lee

Metastatic spinal tumors are usually quite difficult to treat. In patients with metastatic spinal tumors, conventional radiotherapy fails to relieve pain in 20-30% of cases and open surgery often causes considerable trauma and complications, which delays treatment of the primary disease. Percutaneous vertebroplasty (PVP) is considered to be useful in achieving rapid pain control and preventing ...

Journal: :Nucleic acids research 1999
P K Koonjul W F Brandt J M Farrant G G Lindsey

Polysaccharides, secondary metabolites and poly-phenolics are known to co-isolate with nucleic acids from plant tissues resulting in inhibition of molecular manipulations. RNA isolated from the polyphenolic-rich resurrection plant, Myrothamnus flabellifolius, was demonstrated to inhibit a standard polymerase chain reaction used as an assay despite the inclusion of the polyphenolic-binding compo...

2010
Hongyan Liang Wenzhong Wang Yingzhou Huang Shunping Zhang Hong Wei Hongxing Xu

We describe a new route, in which the polyethylene glycol (PEG) is used both as a solvent and reducing reagent and the polymer polyvinglpyrrolidone (PVP) is used as capping agent, for the synthesis of monodisperse silver nanoparticles. Uniform nanospheres with an average diameter of 54 nm can be routinely synthesized in high yield through this approach by using a PVP/AgNO3 molar ratio of 8 at 2...

2015
Xin He Hang Zhang Wei Lin Rongfei Wei Jianrong Qiu Mei Zhang Bin Hu

High-yielded Bi2Te3 hexagonal nanoplates were fabricated via a facile solvothermal method with the assistance of poly (vinyl pyrrolidone) (PVP). Effects of PVP molecular weight and concentration on the morphology and size distribution of the products were illustrated in this study. Molecular weight of PVP is significant for determining the morphology of Bi2Te3. The hexagonal nanoplates with hig...

Journal: :Nanotoxicology 2014
Emilia Izak-Nau Kata Kenesei Kumarasamy Murali Matthias Voetz Stefanie Eiden Victor F Puntes Albert Duschl Emilia Madarász

Engineered amorphous silica nanoparticles (SiO2 NPs), due to simple and low cost production, are increasingly used in commercial products and produced on an industrial scale. Despite the potential benefits, there is a concern that exposure to certain types of SiO2 NPs may lead to adverse health effects. As some NPs can cross the blood--brain barrier and may, in addition, reach the central nervo...

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