Solid 'liquid-crystalline' films of synthetic polypeptides: a new state of matter
Abstract
Materials Literature
文献浏览
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。
Green Synthesis and Characterization of Antibacterial Studies by Iron Oxide Nanoparticles using Carica papaya Leaf Extract
In present years, the synthesis of iron oxide nanoparticles (IONPs) has established excessive potential in biological applications due to their non-toxic role in biological systems, biocompatibility, and biodegradability. Ongoing research efforts focused on IONPs in the expansion of novel technologies as they can be s…
Tensile Properties of Pandanus Atrocarpus based Composites
Pandanus atrocarpus, or locally known as mengkuang plant is likely to be potential natural fibre reinforcement in composite. Both the Pandanus leaves, and fibres extracted from the Pandanus leaves were used in composite fabrication. Fibres were extracted from Pandanus leaves with water retting process. Pandanus compos…
¿Existen especies de Navicula (Bacillariophyta) exclusivas de ambientes de alta montaña en Argentina?
Con el objetivo de analizar la distribución geográfica de 28 especies del género Navicula Bory sensu stricto identificadas en humedales de alta montaña en Argentina, se consultaron cinco catálogos disponibles, publicaciones no incluidas en esas obras y datos recabados en relevamientos inéditos realizados por nuestro e…
Effects of Hydrogen Reduction in Microstructure, Mechanical and Thermoelectric Properties of Gas Atomized <italic>n</italic>-type Bi2Te2.7 Se0.3 Material
<p>The recent rise in applications of thermoelectric materials has attracted interest in studies toward the fabrication of thermoelectric materials using mass production techniques. In this study, we successfully fabricate <italic>n</italic>-type Bi<sub>2</sub>Te<sub>2.7</sub>…
Electron Microscopy of Rubber
Abstract In conclusion we must point out that the basic text book for this subject is C. H. Leigh-Dugmore's “Microscopy of Rubber”. Unfortunately parts of this excellent book need extending to cover modern developments some of which have been reviewed in this paper.
Investigation of Wear Behaviour of Sewn Assemblies of Viscose Linings with Different Treatment
Different types of chemical treatment of textile are widely applied in advanced textile. Finishing of textile can provide additional functional properties for products or/and to improve the appearance of final product as well as to improve their mechanical properties. In this research the influence of the industrial t…
Antimicrobial Compounds from the Rihzomes of <i>Sansevieria hyacinthoides</i>
Three known compounds were isolated from the n-hexane extract of the rihzomes of Sansevieria hyacinthoides, they were two steriods; β- sitosterol (1) and daucosterol (2), and a flavonoid; isokaemferide (3). The structures of the compounds were elucidated on the basis of NMR spectral analysis as well as comparison with…
Peroxides of elements other than carbon. Part XVII. Reaction of tri-2-norbornylboranes with neutral hydrogen peroxide
The reaction between three epimeric tri-2-norbornylboranes and neutral 30% aqueous hydrogen peroxide at 25° has been investigated in the absence and presence of iodine and of carbon tetrachloride. Whereas norbornane, 2,2′-binorbornane, norbornyl iodide, and norbornyl chloride are produced through an intermediate norbo…
Heat stability of chemically crosslinked polyethylene
Abstract Heat stability in air of chemically crosslinked polyethylene loaded with medium thermal (MT) carbon black was studied as a function of temperature and carbon black content. Weight loss at 200° to 250°C is practically independent of the carbon black concentration. Modulus–temperature curves are changed with va…
Roles of Alloying Elements on the Corrosion Behavior of Amorphous W–Zr–(15–33)Cr Alloys in 1 M NaOH Solution
Roles of alloy-constituting elements on the corrosion behavior of the sputter-depositedamorphous W-Zr-(15-33)Cr alloys was studied in 1 M NaOH solution open to air at 25°Cusing corrosion tests and open circuit potential measurements. Zirconium and chromiummetals act synergistically with tungsten in enhancing the corro…
Magnetic susceptibility anomaly in nearly equiatomic MnNi alloys
Abstract The crystallographic and magnetic properties of nearly equiatomic nickel–manganese alloys have been investigated by X‐ray and neutron diffraction techniques as well as by classical susceptibility measurements. It has been found that the antiferromagnetic–paramagnetic phase transition takes place in most of th…
Optical and Electrical Characteristics of CdO thin films deposited by Spray Pyrolysis Method
Cadmium oxide (CdO) thin films have been deposited by a locally developed spray pyrolysis method onto glass substrate at 473K. The optical and electrical properties of the as-deposited and annealed films are studied in details. The surface morphology of the samples was studied by scanning electron microscopy (SEM). Th…
The assignment of the vibrational frequencies of the SO3Cl− Ion
Abstract The Raman spectra of HSO 3 Cl in CH 3 COOH and NaSO 3 Cl in N,N ‐dimethylacetamide are recorded. From these spectra the SO 3 Cl − frequencies are reassigned. The new assignment is in agreement with the Raman spectra of solid (CH 3 ) 4 N · SO 3 Cl, SCl 4 · SO 3 , SeCl 4 · SO 3 and TeCl 4 · SO 3 .
Taxonomic structure of the algal flora of Iran
Algal floristic work carried out in Iran between 1853 and 1981 have been reviewed and compared with the results obtained in a series of recent studies (2000-2007). Algal samples for the recent studies were collected mainly from different inland aquatic habitats. On the basis of data from published and the recent studi…
SYNTHESIS OF GRANULAR LOW-MODULUS ZEOLITES FROM METAKAOLIN USING MECHANOCHEMICAL ACTIVATION AND ULTRASONIC TREATMENT
The process of synthesis of granular low-modulus zeolites from a mixture of metakaolin and solid sodium hydroxide depending on the method of pre-treatment (mechanochemical activation or ultrasonic treatment) has been investigated. The vibration roller-ring mill VM-4 (vibration frequency 930 min–1) was used for mechano…
The Corrosion Behavior of Sputter-deposited Ternary Zr-(12-18)Cr-W Alloys in 12 M HCl Solution
Ternary amorphous or/and nanocrystalline Zr-(12–18)Cr–W alloys were successfullyprepared by direct current (DC) magnetron sputtering. The corrosion rates of Zr-(12-18)Cr-W alloys are in the range of 1-2 x 10-3 mm/y which are even lower than those of thesputter-deposited binary W-Zr and W-Cr alloys, and are nearly one…
Substructure and Perfection in UO 2 Single Crystals
The quality of UO 2 single crystals grown by arc‐melting, by a modified floating‐zone technique (ICZG), and by vapor deposition was studied using etch‐pit patterns, electron microscopy, and X‐ray topography. These techniques complemented each other and indicated significant variations between the crystals grown by the…
Anodic Oxidation and Local Corrosion of Aluminum in Mono-carboxylic Acids
Anodic oxidation of 99.99% aluminum sheets were conducted in solutions of several kinds of mono-carboxylic acids by applying d. c. of 1.87Amp/dm2. The concentrations of the solutions for baths were from 0.01mot/l to saturation and their temperature were from 20°C to boiling points.Porous and thick anodic oxide coating…
Quenched‐in Photoluminescent Color Centers in NaI
Abstract Crystals of NaI, KI, and KCl have been quenched from temperatures as high as 450 °C by rapid immersion in liquid nitrogen. In the case of NaI, very strong absorption bands at 255 nm (Q 1 ) and 226 nm (Q 2 ) may be produced by quenching the crystal from about 360 °C. The excitation spectrum for a characteristi…