Materials Literature
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Many of teleosts are known to have Type I collagen with subunit structure of α1α2α3. Carp, however, is exceptional in that an α3 chain is absent from the swim bladder Type I collagen, but is present as a minor subunit in the skin Type I collagen. In this study, the skin α3 chain of carp was isolated by CM-cellulose ch…
The temperature rise in the substrate as well as in the bulk solution and the development of a local brown-coloured 'burnt' region on the anodic film are the characteristics of high rate anodizing of aluminum in oxalic acid. In this study, measurement of the barrier layer thickness in both the predicted burning region…
Ni modified Ti–6Al–4V alloy has been investigated under uniaxial test conditions at different temperatures 1023∼1103 K and at strain rates in the range of 5×10−5 to 5×10−3 s−1. The maximum elongation (about 422%) was found to occur at 1088 K and a strain rate of 2.0×10−4 s−1. There was evidence of strain hardening or…
Abstract Tool steels are any steel used to make tools for cutting, forming, or shaping manufactured parts. Most tool steels are wrought products alloyed with relatively large amounts of tungsten, molybdenum, vanadium, manganese, and/or chromium. The article describes a wide variety of tool steels, including high-speed…
Abstract Basket‐shaped hosts were synthesized starting from the concave building block 4 magnified image To this end, oligo(oxyethylene) bridges, containing different aromatic rings, were attached to the 3,6‐ and 3′,6′‐positions of the xylylene rings of 4 . These bridges include 5,6‐benzo‐1,4,7,10‐tetraoxadec‐5‐ene, 5…
Abstract Rheological studies of an experimental liquid crystalline (LC) copolyester were carried out using a capillary rheometer and a cone and plate rheometer. Rheological characteristics of the polymer in the nematic state were observed. The nematic melt was found to be pseudoplastic and the degree of pseudoplastici…
The title ligand and a C-functionalised analogue have been prepared; the ligand is very strongly basic [pKa LH+, LH2+ < 14 (298 K)] and forms remarkably stable complexes with yttrium and calcium.
Abstract
The changes induced in some titania-supported iron–ruthenium and iron–iridium catalysts following pretreatment in hydrogen have been examined in situ by 57Fe Mössbauer spectroscopy. Fe3+, which is formed in the supported metallic phase by initial treatment in air, undergoes partial reduction when treated in hydrogen a…
Abstract Elastic filaments have been produced by melt spinning poly(tetramethylene terephthalate)/poly(tetramethylene ether glycol)‐terephthalate (PTMT/PTMEG‐T) copolymers of various hard segment contents (HSC). Some of these copolymers are difficult to spin because of their elastic nature and sluggish crystallization…
The occurrence of a bloom of the diatom Asterionella glacialis (Castracane) was recorded in the Rushikulya Estuary (Orissa), East Coast of India for a period of about 5 weeks during April-May 1988. Phytoplankton cell counts during this period ranged from 3.98-9.42 x 10 super(4) cells 1/1 in which A. glacialis alone co…
Macrophages, one of the immunologically competent cells centrally contributing to host defense mechanisms, can be stimulated by a variety of immunomodulatory agents to exert antitumor activity. However, many problems, such as serious side effects attributed to the high-dosage regimens of the drugs, should be addressed…
The influence of sub-T/sub g/ (the glass transition temperature) physical aging processes on the electrical properties of amorphous polymethylmethacrylate (PMMA) and polydiancarbonate was investigated by means of the thermally stimulated depolarization currents, isothermal transient charging currents, and AC low-frequ…
The enhanced luminescence of the Eu-dibenzoylmethane(DBM)-NH3 system in the presence of Tb3+ and the effect of solvents on that system in the absence of Tb3+ were studied. The optimum conditions for co-luminescence of the Eu-Tb-DBM-NH3 system were examined. The optimised procedure was applied to the determination of t…
A method is presented to establish a multisection network model for study of high-frequency transient behavior of transformer and machine windings. The parameters of the network model are estimated using the maximum-likelihood estimation technique. In order to verify the proposed estimation method, the parameters of a…
The Bi 2 O 3 ‐rich side of the system Bi 2 O 3 ‐SiO 2 was studied with powder X‐ray diffraction and differential thermal analysis. In the composition 6Bi 2 O 3 . x SiO 2 , the metastable γ phase (bcc) was observed to exist over the range of 0 < x ≤ 1. In most of the compositions studied, metastable phases of water‐que…
Abstract A series of natural rubber vulcanizates containing varied amounts of sulfur and an accelerator (N‐cyclohexyl‐2‐benzothiazyl sulfenamide, CBS) were prepared and their resistance to attack by a strain of Nocardia , capable of utilizing natural rubber as carbon substrate, was examined. The higher the content of…
This paper discribes the development of Functionally Gradient Material (FGM) which is promoted by Science and Technology Agency with "special coordination funds for promoting science and. technology" from 1987. FGM is an advanced metal/ceramic compositional gradient from a metal side to a ceramic side to obtain the fu…
Surface Barkhausen noise (SBN) measurements were made on a 2% Mn pipeline steel sample subjected to different levels of applied tensile and compressive isostress. The magnetic field direction was varied through a full 360 degrees . SBN voltage was found to depend on both stress level and magnetic field direction. The…
The soft magnetic properties of sputtered (0 approximately 3-wt%) Si-Fe alloy thin films fabricated in (Ar+N/sub 2/) plasma were investigated in connection with metallurgical structure. 2.7-wt% Si-Fe film annealed at 400 degrees C shows a high effective permeability mu /sub eff/ of about 1600 at 5 MHz. It has been obs…