Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
The skin of golfers' hands provides a suitable model to study the effect of chronic sun exposure, because one of their hands is exposed to the outer environment, especially sunlight, while the other one is always protected by a glove during play. Our purpose was to find out the influence of photodamage on the properti…
Radiation doses to both the fingertip and finger base of staff preparing radiopharmaceuticals in a radionuclide dispensary have been monitored for more than 5 years. The records show a fall in dose thought to be due, largely, to the introduction of all-glass (lead) syringe shields. In 1998, the annual radiation dose (…
Data acquisition packages developed at different small angle scattering facilities use different formats both for raw and processed data storage. To facilitate the data exchange between laboratories, a consensus in the small angle scattering community has been reached on an ASCII format for one-dimensional data which…
Degumming with 25% (owO Marsei lle's soap for 1. 5 h at boil gives a weight loss of20.5 %, whereas degumming with enzyme (3 mllg of fabric) at 37()C for 3 h gives a weight loss of about 19.8 %. Treatment with enzyme requires much lower temperature than that in the conventional process. Processing of silk with enzyme u…
In order to improve the biochemical reactivity of the cellulose polymer, which is mainly attributed to the presence of surface hydroxyl groups, derivatized cellulosic membranes have been engineered replacing or masking some or all of the hydroxyl groups in the manufacturing process of the membrane. The present study w…
Abstract Observations of natural minerals and experimental run products show that I-S (illitesmectite mixed-layer minerals) with a high illite content as well as pure mica-illite crystallites can have a lath shape (aspect ratio >3). This shape is common to the I-S minerals under a variety of conditions of formation…
Abstract Monte‐Carlo simulation was used to study the short‐chain branch formation of polyethylene made with a Ni‐diimine catalyst. Branches are formed through the chain‐walking mechanism without any comonomer addition. The model describes the type of branch, that is, methyl, ethyl, propyl, butyl, pentyl, hexyl, hepty…
Abstract A convenient method for the synthesis of poly(butylene succinate) (1) of high molecular weight has been developed. This polyester was prepared readily by the distannoxane-catalyzed polycondensation of succinic acid (2) with 1,4-butanediol (3) in decalin at 190 °C under azeotropic condition. The polycondensati…
A new electrooptical mode was discovered in Deformed Helix Ferroelectric (DHF) liquid crystal cells. This mode appears, if the driving voltage frequency and amplitude are rather high. The electrooptical response time τ0, 1-0, 9 is practically independent on temperature in a very broad range but it strongly depends on…
Abstract The effect of injection molding conditions and reactive compatibilization on the morphology of maleic anhydryde‐modified poly(phenylene oxide)/polyamide‐6 blends was investigated. The injection flow rate primarily influenced the position of the subskin layer, and the injection temperature affected the aspect…
A simple theoretical model is proposed for studying the properties of blended fibrous structures. The model is verified using experimental results from blended yams. The effect on a blended system's properties due to interactions of the different constituents in the blended structure is analyzed, and the parameters in…
No abstracts
A series of polyimides were prepared by a solution polycondensation reaction between 3-carboxylmethylcyclopentane-1,2,4-tricarboxylic dianhydride and 4-alkyloxybenzene-1,3-diamines in N-methyl-2-pyrrolidone and chemical imidization with triethylamine and acetic anhydride. These polyimides possess great organo-solubili…
The oxidation of HCN has been conducted in a fused silica jet-stirred reactor (JSR) at atmospheric pressure and from 1 000 to 1400 K. The reduction of nitric oxide (NO) by HCN has also been studied in a JSR in the same operating conditions. A detailed chemical kinetic model for NO-reburning (751 reactions and 102 spec…
Abstract Ag+/ZSM-5 catalysts were prepared by an ion-exchange method. UV-irradiation of the Ag+/ZSM-5 catalysts in the presence of N2O led to the photocatalytic decomposition of N2O into N2 and O2 at 298 K. Investigations of the effective wavelength of the irradiated UV-light for the reaction as well as the in-situ ch…
The kinetic behavior of dislocation loops in overheated free-standing smectic-A films is reported. The loops open at velocities that are much faster than those seen in nonoverheated films. The velocities increase dramatically as a function of temperature and vary slightly as a function of film thickness. The behavior…
Effects of excluded volume interaction on the form factor of a block copolymer micelle model have been investigated by performing Monte Carlo simulations. The micelles are modeled as a corona of semi-flexible chains tethered to a spherical core. Simulated form factors are analyzed using the model proposed by Pedersen…
Abstract The structure of amorphous silica has frequently been compared with its crystalline counterparts in an attempt to understand the glass structure beyond short-range correlations. This paper presents results from neutron total scattering measurements of several polymorphs of silica and shows how these can be us…
Reflectance measurements and optical constants of thin films of ion-beam-deposited SiC, Mo, Mg(2)Si, and InSb and of evaporated Cr have been measured in the extreme-ultraviolet (EUV) spectral region from 49.0 to 200.0 nm. In this spectral region no optical constant data were available for materials deposited by ion-be…
Abstract Celadonite and glauconite samples heated at different temperatures were studied by X-ray and electron diffraction. For dioctahedral micas the in-plane component of the translation between layers ( c cosβ/ a ), which is strongly dependent on the position of the vacant octahedral site, significantly decreases a…