Colloidal particle size is an important characteristic that allows mapping sentinel nodes in lymphoscintigraphy. This investigation aimed to introduce different ways of making a (99m)Tc-tin colloid with a size of tens of nanometers. All agents, tin fluoride, sodium fluoride, poloxamer-188, and polyvinylpyrrolidone (PVP), were mixed and labeled with (99m)Tc. Either phosphate or sodium bicarbonat...

Every year, millions of people are suffering from bone defect arising from trauma, tumor or bone diseases. Therefore, there is a growing need for the development of biocomposites with excellent bioactivity and compatibility. In this study, nano-hydroxyapatite was elaborated by using polyvinyl alcohol (PVA) and polyvinylpyrrolidone (PVP) under mild temperature condition. Comparison with pure nan...

The combination of adsorption and photodegradation processes is an effective technique for the removal dye contaminants from water, which motivating development novel adsorbent-photocatalyst materials wastewater treatment. Herein, nanocomposite porous beads were developed using titanium dioxide (TiO2) nanotubes embedded in a sodium alginate (SA)/polyvinylpyrrolidone (PVP) matrix calcium chlorid...

in this work, we report synthesis and characterization of copper nanoparticles in polymer matrix by wet-chemical reduction method using ascorbic acid as reducing agent, copper (ii) sulfate as metal precursor and polyvinylpyrrolidone k-30 (pvp k-30) as surfactant agent. the reaction was carried out in a high-speed stirring mixture at room temperature under nitrogen atmosphere. characterization o...

The present work was carried out to assess the value of adding water insoluble polymer meloxicam amorphous solid formulation (ASD). Meloxicam mixed with polyvinylpyrrolidone (PVP) (1:1 ratio) as a binary mixture and PVP ethyl cellulose (1:1:1 ternary mixture. Solvent evaporation method used prepare ASD formulations. differential scanning calorimetry, powder X-Ray diffraction, Cambridge Structur...

How to inhibit the formation of point defects in preparation process hybrid perovskite for improving stability and photovoltaic characteristics has been a hot research issue recent years. Herein, molecular engineering polyvinylpyrrolidone (PVP) is focused as Lewis base an additive improve interface matching solar cells. Based on binding strategy, film crystallinity, bond binding, interfacial tr...

Abstract Nano scale fibers of SiO 2 and TiO with various compositions viscosity parameter have been prepared by electrospinning the precursor tetraethyl orthosilicate (TEOS) titanium (IV) isopropoxide (TiP). Different concentrations polymer polyvinylpyrrolidone (PVP) applied voltages were studied. Distance tip to collector 15 cm flow rate 0.003 mL/h fixed for entire process. The morphology nano...

We prepare of ZnO quantum dots embedded in polyvinylpyrrolidone (PVP) matrix and report it’s working as ethanol sensor. The samples have been prepared via quenching technique where bulk ZnO powder is calcined at very high temperature of 1200 ̊C and then quenched into ice cold polyvinylpyrrolidone solution. Thee acteiut the samples specimen have been characterized by using UV/VIS spectroscopy, X-...

Nostoc flagelliforme is a terrestrial edible cyanobacterium that grows in arid and semi-arid steppes. The continued over-exploitation in the last century has led to a sharp decline of this resource and a severe deterioration of the steppe ecology. Liquid-cultured N. flagelliforme serves as promising algal 'seeds' for resource restoration. In this study, macroscopic (or visible) aquatic-living c...

Microwave irradiation was employed for spherical-shaped platinum nanoparticle (Pt NPs) preparation. Spherical Pt NPs indexed with (111) facets were prepared using Pt(II) precursor salt, glycerol as solvent and reducing agent, and polyvinylpyrrolidone (PVP) as a shape directer under microwave irradiation for 3-5 min at 300 °C. Electron spin resonance (ESR) peak at 336.000 mT (milli Tesla) confir...