نتایج جستجو برای: Polyol Process

تعداد نتایج: 1313712  

Journal: :The journal of physical chemistry. B 2004
Chao Liu Xiaowei Wu Timothy Klemmer Nisha Shukla Xiaomin Yang Dieter Weller Anup G Roy Mihaela Tanase David Laughlin

Monodispersed FePt nanoparticles are synthesized by reduction of iron(II) acetylacetonate and platinum(II) acetylacetonate with 1,2-hexadecanediol as the reducing reagent in the polyol process. As-prepared FePt nanoparticles are chemically disordered with fcc phase. Transmission electron microscopy (TEM) images show a self-assembled particle array with an average particle size of 3 nm and a sta...

Journal: :Journal of Korean Powder Metallurgy Institute 2004

2014
Paul R Hanson Susanthi Jayasinghe Soma Maitra Cornelius N Ndi Rambabu Chegondi

An efficient and divergent synthesis of polyol subunits utilizing a phosphate tether-mediated, one-pot, sequential RCM/CM/reduction process is reported. A modular, 3-component coupling strategy has been developed, in which, simple "order of addition" of a pair of olefinic-alcohol components to a pseudo-C 2-symmetric phosphoryl chloride, coupled with the RCM/CM/reduction protocol, yields five po...

Journal: :E-polymers 2021

Abstract In this article, five kinds of soybean oil-based polyols (polyol-E, polyol-P, polyol-I, polyol-B, and polyol-M) were prepared by ring-opening the epoxy groups in epoxidized oil (ESO) with ethyl alcohol, 1-pentanol, isoamyl p -tert-butylphenol, 4-methoxyphenol presence tetrafluoroboric acid as catalyst. The SOPs characterized FTIR, 1 H NMR, GPC, viscosity, hydroxyl numbers. Compared ESO...

2011
Yasuhiro Hashimoto Shin‐Ichiro Yamagishi Hiroki Mizukami Chihiro Yabe‐Nishimura Sun Woo Lim H Moo Kwon Soroku Yagihashi

UNLABELLED Aims/Introduction:  The polyol pathway has long been involved in the pathogenesis of diabetic nephropathy. It remains still unclear, however, how the polyol pathway is implicated in this process. We explored the effects of the enhanced polyol pathway on renocortical tubular cells and glomeruli in experimentally-induced diabetes. MATERIALS AND METHODS   Transgenic mice (Tg) overexpr...

Silver nanowires (AgNWs) are considered as one-dimensional nanostructures, which have received much attention due to their nanoscale size, high aspect ratio, high electrical and thermal conductivity, optical transparency and high mechanical stability. Preparation of AgNWs by polyol process is remarkably sensitive to the interactions between synthesis parameters. In this study, the effect of the...

Journal: :Chemical communications 2003
Zhenhua Zhou Suli Wang Weijiang Zhou Guoxiong Wang Luhua Jiang Wenzhen Li Shuqin Song Jianguo Liu Gongquan Sun Qin Xin

A 40 wt% Pt/C cathode electrocatalyst with controlled Pt particle size of approximately 2.9 nm showing better performance than commercial catalyst for direct methanol fuel cell was prepared by a polyol process with water but without using stabilizing agent.

Journal: :Plant physiology 1987
S A Dudley M J Lechowicz

Upon rewetting, lichens lose polyols through leaching. We quantified leaching losses for 21 species under simulated rainfall. Polyol concentrations in these lichens range from 1.0 to 8.8%, with a mean of 2.8%. Leaching losses range up to about 7.5 mg (polyol)/g (lichen dry weight) in a typical rain event. The rate of polyol leaching declines exponentially, becoming negligible within 1 hour of c...

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