Nanoparticles of Ni carbide of about 50 nm in diameter were synthesized by the reduction of Ni salt in a polyol solution in the presence of polyvinylpyrrolidone (PVP). It was found that the aggregation of nanoparticles was suppressed when PVP was added to the polyol solution during synthesis. Diffraction peaks of the fcc and hexagonal structures were observed for the specimen synthesized withou...

By MAXIM D. PERSIDSKY AND VicroR RICHARDS P OLYVINYLPYRROLIDONE (PVP), a non-polar hydrophilic polymer, has been used by a number of investigators16 as a protective agent in freezing erythrocytes. Currently it is considered one of the most effective additives in the low temperature preservation of hlood.7#{176} An early attempt, by other investigators,10 to extend the scope of PVP as a preserva...

The main objective of this work was to use Weibull distribution function and Baker-Lonsdale models to study the dissolution kinetics of prepared binary and ternary interactive mixtures containing indomethacin in comparison with three commercially available capsules of indomethacin, namely, Rothacin®, Indomin® and Indylon®. Differential scanning calorimetry (DSC) in conjunction with cloud point ...

We investigated the electrical stabilities of two types of pentacene-based organic thin-film transistors (OTFTs) with two different polymeric dielectrics: polystyrene (PS) and poly(4-vinyl phenol) (PVP), in terms of the interfacial charge depletion. Under a short-term bias stress condition, the OTFT with the PVP layer showed a substantial increase in the drain current and a positive shift of th...

BACKGROUND Povidone iodine (PVP-I) is a chemical complex of polyvinylpyrrolidone (also known as povidone or PVP) and elemental iodine. Iodine containing compounds are widely and commonly used as antiseptics and disinfectants. They are available in various forms like aqueous solution, tincture, aerosol, ointment, or foam. Skin irritation to them is due to the oxidative effects of iodine. Because...

OBJECTIVE To evaluate the function of percutaneous vertebroplasty (PVP) treatment to pain relief and life quality for patients with spinal tumors. METHODS Articles about the researches on the treatment of spinal tumors by PVP in PubMed, Embase, and the Chinese Biomedical Literature database from January 1, 2015 to December 31, 2013. The keywords "spinal tumors," "efficacy," and "vertebroplast...

INTRODUCTION Since the first case of Middle East Respiratory Syndrome coronavirus (MERS-CoV) infection was reported in 2012, the virus has infected more than 1300 individuals in 26 countries, and caused more than 480 deaths. Human-to-human transmission requires close contact, and has typically occurred in the healthcare setting. Improved global awareness, together with improved hygiene practice...

OBJECTIVE To determine whether patients with acute unilateral peripheral vestibulopathy (PVP), often called "vestibular neuritis/neuronitis or neuropathy" (VN) have a vestibular lesion pattern consistent with the distribution of the neurological afferents. BACKGROUND Much is known about the clinical nature of PVP, however less so about its etiology and pathogenesis. Due to the frequency with ...

Although present in many patients with heart failure and a normal ejection fraction, the role of isolated impairments in active myocardial relaxation in the genesis of elevated filling pressures is not well characterized. Because of difficulties in determining the effect of prolonged myocardial relaxation in vivo, we used a cardiovascular simulated computer model. The effect of myocardial relax...

Over the past several decades, formulation of novel nanofiber-based drug-delivery systems has been a frequent focus scientists around world. Aiming to introduce nanofibrous transdermal system treat pain, nanofiber mats buprenorphine-loaded poly (vinyl pyrrolidone) (Bup/PVP) and poly(vinyl alcohol)/poly(vinyl (Bup/PVP/PVA) were successfully fabricated by electrospinning process for drug delivery...