Materials Literature
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A hydroxyamide-containing tetracarboxylic dianhydride was synthesized from trimellitic anhydride chloride and bis(3-amino-4-hydroxyphenyl)sulfone. Poly(amic acid)s (PAAs) were prepared from this dianhydride with several diamines in N-methyl-2-pyrrolidone (NMP). The reflux of the PAA solutions at 160°C for 3 h allowed…
The polymer stabilization (PS) is an attractive technique because the physical property of liquid crystals (LCs) can be improved and furthermore the new characteristics may occur. In this paper, we offer a new type of PS-LC in which the photocure is done at a temperature where the LC medium is in the nematic phase und…
Different molecular weights of chitosan, N-deacetylated derivative of chitin acquired from supporting material of Crustacea, were treated on postharvest grape in order to investigate their influence on disease incidence and quality during storage of fruit. Higher molecular weights of chitosan enhanced storability of g…
Abstract — This study focuses on the manufacture of carbon nanotubes using the arc discharge method. Several independent variables were changed, such as the current (80 and 100 A), an atmosphere of open air or argon and the catalyst (no catalyst, Fe or a mixture of Fe/Co,Ni). Only one set of parameters yielded MWNTs,…
A Ni2P/SiO2 catalyst that is highly active for hydrodesulfurization (HDS) reaction was studied by in situ extended x‐ray absorption fine structure (EXAFS) under the real reaction conditions. The measurements were conducted at realistic conditions of high pressure (3 MPa) and high temperature (613 K) in the presence of…
Poly(ethylene glycol)methacrylate (PEGMA) was grafted onto poly(vinyl chloride) (PVC) tubes by pre-irradiation in presence of air using a gamma-ray source. The effects of monomer concentration, pre-irradiation dose from 5 to 150 kGy, dose rate, reaction time between 4 and 24 h, and reaction temperature were investigat…
Abstract- This research comprises a study of the effect of heat treatment on fatigue behavior of (A193-51T-B7) alloy steel. Two heat treatment processes were conducted, namely, annealing and quenching followed by tempering at 200 o C. All fatigue tests were carried out using a rotary bending machine with constant stre…
The Sanchez-Pomraning method to resolve the double heterogeneity problem in the MOC \ntransport calculation is described in detail. This method is founded on the collision probability method concepts which involves the collision and escape probabilities, and formally derived by using the statistical treatment of t…
International audience
高 MW 去乙酰壳多醣(CS ) 答案已经为蛋白质交货作为车辆被建议了。现在的工作的目的是调查潜在的用途 ofwater 可溶的去乙酰壳多醣(WSC ) 作为车辆装载并且交付蛋白质。有各种各样的形成的 WSC nanoparticles (WSC NP ) 与 pentasodiumtripolyphosphate (TPP ) 基于 WSC 的离子的冻结被准备阴离子。牛的血清白蛋白(BSA ) 被用作合并到 WSC nanoparticles 的模型蛋白质药。空白、装载 BSA 的 WSC nanoparticles 被检验并且决定与在 35 之间的直径有球形的形状—190 nm，和希腊语的第六个字母潜力 between35—4…
Recently, ship owners require saving cost of inspection and repair due to corrosion in crude oil tanks of oil tankers. There are two types of corrosion in crude oil tank, the general corrosion at upper deck plate and the pitting corrosion at bottom plate. On the basis of the results of field examinations on several VL…
The superfine boron powder was coated by aggradation method with AP using methanol or acetone as the solvent. The coating effect were characterized by FT-IR, heat analysis, atom force microscope, transmission electron microscope et al, and the influencs on the coating of the solvent, vaporized velocity and amido-silic…
For many decades, considerable efforts have been devoted to the development of new solvents for cellulose which are non-toxic and and do not cause derivatization of the solute. In recent years, it has been found that some types of ionic liquids are capable of dissolving cellulose. The structural differences between wo…
The hardness test,tensile test and microstructure analysis were used to investigate the properties and structure variation of ZK60 alloy in as-cast,extrusion,solid solution and aging states.The results show that the hardness and strength of ZK60 alloy increase obviously after extrusion and T5 treatment.The hardness an…
High boron iron-based alloy(HBIA) is a kind of new wear-resistant material.Boron and carbon are the important elements that can decide boride and matrix respectively,and their contents affect the microstructure and properties of the HBIA greatly.An orthogonal experiment was adopted to study microstructure,hardness and…
Here we have firstly summarized the relationship between microscopic(electron,atom,ion and molecule) structure and macroscopic(dielectric,conductive,breakdown and aging) property established by using the thermodynamic,statistic,quantum mechanics and solid state physics,and based both on the multi-hierarchy of space sc…
[Objective] To compare the distribution of quercetin turbid solution and that of liposome nanoparticles loaded quercetin solution in rats. [Method] SD race rats were used and were divided into control group (n=25) with quercetin suspension injected and experimental group (n=25) with liposome nanoparticle loaded querce…
The cooling characteristics of a room temperature magnetic refrigerator using an active magnetic regenerator (AMR) is presented. The AMR system, which is based on a combination of a thermal storage process and a regeneration process, is widely applied for room temperature magnetic refrigerator. And the system has four…
The bendability and deformation behavior of a magnesium alloy tube during press bending is experimentally investigated to clarify the effect of forming temperature. Bending experiments using a mandrel of wires are carried out at room temperature and at 473K. A magnesium alloy AZ31 circular tube with a 25.4mm outer dia…
The five-year METI/NEDO’s nanoparticle project started in 2001. In this study, various nano-sized particles, e.g. Au, Ag, GaN, ZnO, FePt, CdSe, Y2O3:Eu, (Y,Gd)3Al5O12:Ce, ZnS:Mn, etc., were prepared by gas-phase methods (thermal and plasma CVD) and by liquid-phase methods (spray pyrolysis, spray drying as well as sol-…