Materials Literature
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The purpose of this work is to investigate the basic electrical properties of type –II CdTe/CdS/ZnS core/shell/shell quantum dot to explore the use in all- inorganic light emitting diodes towards the application in optoelectronic devices. It was based on the development of colloidal quantum dots consisting of semicond…
مقدمه: روشهای مبتنی بر فناوری زیستی به علت تمیزی و سازگاری بسیار بالا با محیط زیست از جایگاه ویژه ای برخوردار اند. با وجود سمیت بالای نقره، تعداد محدودی از میکروارگانیسمها نه تنها در برابر نقره مقاومت دارند بلکه قادر به احیای آن به شکل نانوذرات نقره نیز هستند. هدف از این تحقیق، جداسازی و معرفی سویههای باکتری…
New biodegradable materials for artificial muscles and soft actuators are required for biomedical and soft robotic applications. Here we present an investigation into the biodegradability and electroactive actuation characteristic of a series of off-the-shelf biodegradable materials. Eight materials were examined: cel…
Mesoporous materials possess both a well-defined topography on the nanometer scale, and they may serve as hosts for drugs. In this work, titanium implants coated with mesoporous TiO2 thin films have been evaluated both in vitro and in vivo. Material characterization showed that, long-range ordered mesoporous TiO2, wit…
Let $M$ be a model set meeting two simple conditions: (1) the internal space $H$ is a product of $R^n$ and a finite group, and (2) the window $W$ is a finite union of disjoint polyhedra. Then any point pattern with finite local complexity (FLC) that is topologically conjugate to $M$ is mutually locally derivable (MLD)…
Boron carbide (B4C) is one kind of neutron absorbing control rod/blade materials used in light water reactors (LWRs). In Fukushima Daiichi Nuclear Power Station (NPS), all units used B4C as absorber material. The degradation of control rod/blade will affect the early phase of in-vessel core melt progression. Furthermo…
The results of numerical investigation of influence of atmospheric turbulence, wind speed and direction as well as radon and thoron flux density from the soil on characteristics of atmospheric a-, b- and g-radiation fields, which created by atmospheric radon, thoron and their short-lived decay products, are represente…
Applicability of out of service leaf springs of 60С2 steel as material of compensating element for ploughshares restoration is shown.
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The aim of this work is about the study of bioreactors in obtaining biopolymers (polyhydroxyalkanoate) by mixed microbial sources using cheese whey from the dairy industry as a substrate. To obtain polyhydroxyalkanoates (PHAs) is necessary to start with an enrichment process of the bacterial strain in a sequential bat…
A comprehensive study was conducted on the collapse mechanism of rings cut off from line pipe specimens. It was theoretically established that a ring without end restraints should have a lower collapse pressure value than an equivalent full-scale joint. However, similar collapse pressure test results were obtained for…
The empirical compositions of pollucite (analcime-pollucite) from various occurrences are analyzed using the AO-BO 0.5 -AlO 1.5 -SiO 2 , “AAl 2 O 4 ”-“BAlO 2 ”-SiO 2 -H 2 O, and BO 0.5 -AlO 1.5 -SiO 2 -H 2 O (A = alkaline-earth element, B = alkali element) composition tetrahedra. Three-dimensional geometric analysis i…
Platinum–copper (molar ratio 1:1) bimetallic nanoparticles were synthesized by polyol method using ethylene glycol (EG) as the solvent and PVP as the stabilisation agent under microwave conditions compare with reduction by using NaBH 4 at room temperature and combination both technique of reduction. The samples were c…
Submicron grain size Ba1 − x La x TiO3 (x = 0.025–0.05) barium titanate ceramics have been prepared by two-step heat treatment. The grain size of the ceramics was 200–400 nm at x = 0.025 and 300–700 nm at x = 0.05, and the ceramics had increased dielectric permittivity (ɛmax ≃23 000 at x = 0.025 and ɛmax ≃ 46 000 at x…
Various methods of pretreatments were investigated to their effect on cellulose to glucose conversion efficiency on enzymatic hydrolysis of a tropical agro-industrial waste residue (empty palm fruit bunch, EFB). Four different kinds of combinative pretreatments (autohydrolysis with and without naphthol, dilute acid pr…
Phase transformations of an Al-12 at % Si alloy have been studied by differential barothermal analysis at temperatures of up to 700°C in argon compressed to 100 MPa. Heating at a rate of 8°C/min under a pressure of 100 MPa has been shown to increase the temperature of the L → (Al) + Si eutectic transformation in the a…
Calcium hydrogen phosphate dihydrate and amorphous calcium phosphate have been synthesized in an aqueous suspension of medium molecular weight chitosan in the presence of glutamic or aspartic acid. X-ray diffraction and transmission and scanning electron microscopy characterization showed that the morphology of the ph…
The effect of the concentrations of the oxidizing agent (sodium persulphate) on the properties of poly (m-aminobenzene sulfonic acid -co- aniline) p(m-ABSA-co-Ani) co-polymer has been investigated. The prepared samples were confirmed by Fourier transformation infrared spectroscopy and further , characterized by electr…
There has been increasing interest in the biological and biomedical applications of carbon nanotube. We addressed the novel question: Are pure CNTs produced for distribution to manufacturers "toxic" to plants through their effects on physiological processes? We germinated and grew Arabidopsis thaliana seedlings on bas…
The authors provide the results of experimental research of influence of polypropylene and polyester mesh implants on the state of the reproductive organs after simulated hernioplasty