نتایج جستجو برای: copper embedded in pvp matrix

تعداد نتایج: 17067040  

Ali Asghar Hemmati Mohammad Jafar Abdekhodaie,

Effects of formulation parameters on the fractional release profile of diclofenac sodium from matrices having the manufacturing formulation ingredients are studied. As a content of cetyl alcohol (rate controlling agent) in the matrix increases, the fractional release decreases. The fractional release increases either by increasing sucrose content outside the granule or by decreasing sucrose...

Journal: :Drug development and industrial pharmacy 2016
Nizar Al-Zoubi Ghada Al-Obaidi Bassam Tashtoush Stavros Malamataris

In this work, aqueous diltiazem HCl and polyvinyl-pyrrolidone (PVP) solutions were mixed with Kollicoat SR 30D and spray dried to microparticles of different drug:excipient ratio and PVP content. Co-spray dried products and physical mixtures of drug, Kollidon SR and PVP were tableted. Spray drying process, co-spray dried products and compressibility/compactability of co-spray dried and physical...

2009
Han-Xuan Zhang Uwe Siegert Ran Liu Wen-Bin Cai

A facile chemical reduction method has been developed to fabricate ultrafine copper nanoparticles whose sizes can be controlled down to ca. 1 nm by using poly(N-vinylpyrrolidone) (PVP) as the stabilizer and sodium borohyrdride as the reducing agent in an alkaline ethylene glycol (EG) solvent. Transmission electron microscopy (TEM) results and UV-vis absorption spectra demonstrated that the as-p...

Journal: :Nanotechnology 2008
Youngil Lee Jun-Rak Choi Kwi Jong Lee Nathan E Stott Donghoon Kim

Copper nanoparticles are being given considerable attention as of late due to their interesting properties and potential applications in many areas of industry. One such exploitable use is as the major constituent of conductive inks and pastes used for printing various electronic components. In this study, copper nanoparticles were synthesized through a relatively large-scale (5 l), high-throug...

Journal: :journal of nanostructures 2012
m. sobhani h. arabi a. r. mirhabibi

copper matrix composite reinforced by 1wt.% tib2 particles was prepared using in situ reaction of cu-1.4wt.% ti and cu-0.7wt.% b by rapid solidification and subsequent heat treatment for 1-20 hrs at 900ºc. high-resolution transmission electron microscopy (hrtem) characterization showed that primary tib2 particles were formed in liquid copper. heat treatment of as-solidified samples led to the f...

2017
Jochen Willersinn Bernhard V. K. J. Schmidt Felix H. Schacher

The self-assembly of a novel combination of hydrophilic blocks in water is presented, namely poly(2-ethyl-2-oxazoline)-b-poly(N-vinylpyrrolidone) (PEtOx-b-PVP). The completely water-soluble double hydrophilic block copolymer (DHBC) is formed via copper-catalyzed polymer conjugation, whereas the molecular weight of the PVP is varied in order to study the effect of block ratio on the self-assembl...

2013
Ji-Hong Chai Qing-Sheng Wu

Nanofibers containing ferrocene (Fc) have been prepared for the first time by electrospinning. In this paper, Fc was dispersed uniformly throughout the poly(vinypyrrolidone) (PVP) matrix for the purpose of combining the properties of PVP and Fc. The effects of solvents and Fc concentration on the morphologies and diameters of nanofibers were investigated. In the DMF/ethanol solvent, the morphol...

Journal: :iranian journal of pharmaceutical research 0
pintu kumar de b.c. roy college of pharmacy and allied health sciences, bidhannagar, durgapur, 713206, w.b. india. subrata mallick school of pharmaceutical sciences, soa university, bhubaneswar-750030, orissa, india biswajit mukherjee department of pharmaceutical technology jadavpur university, kolkata-700032, india sagar sengupta b.c. roy college of pharmacy and allied health sciences, bidhannagar, durgapur, 713206, w.b. india satyanarayan pattnaik college of pharmaceutical sciences, mohuda, berhampur, orissa, india subrata chakraborty b.c. roy college of pharmacy and allied health sciences, bidhannagar, durgapur, 713206, w.b. india.

the present study was undertaken to develop a suitable transdermal matrix patch of ketorolac tromethamine with different proportions of polyvinyl pyrrolidone (pvp) and ethyl cellulose (ec) using a d-optimal mixture design. the prepared transdermal patches were subjected to different physicochemical evaluation. the surface topography of the patches was examined by scanning electron microscopy (s...

2013
Abebayehu N Yilma Shree R Singh Saurabh Dixit Vida A Dennis

Chlamydia trachomatis is a very common sexually transmissible infection in both developing and developed countries. A hallmark of C. trachomatis infection is the induction of severe inflammatory responses which play critical roles in its pathogenesis. Antibiotics are the only treatment option currently available for controlling C. trachomatis infection; however, they are efficacious only when a...

Mahsa Hedayatzadeh Mohammad Reza Avadi

The main aim of this study was preparation and evaluation of extended - release system ofthe anxiolytic substance. Alprazolam is a short-acting benzodiazepine with general propertiessimilar to those of diazepam. Our studies focused on development of extended drug deliverysystem based on Hydroxy Propyl Methyl Cellulose (HPMC 4000cps) as retard agent andPolyvinylpyrrolidone (PVP k30) as binder us...

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