Materials Literature
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This paper presents some results on the surface treatments given to natural fibers, namely coir, banana, and sisal fibers, using γ-methacryloxypropyltrimethoxysilane (MEMO), y-aminopropyltriethoxysilane (AMEO), sodium alginate (NaAl), and sodium hydroxide (NaOH) solutions. The cleaned, washed, and dried fibers were di…
Bonding of nitride ceramics (Si3N4 and AlN) to metals was carried out in a vacuum of about 6 mPa using Cu-base active filler metals. Reaction layers existed at the interfaces between Si3N4 or AlN and insert layers, and Cu enriched layers were found in the bonding layers. Reaction layers in Si3N4 to W joints were compo…
Isolation of actinomycetes is an indispensable step in the screening programs of industrially useful strains as well as in the ecological study of microorganisms. During the past 10 years, the author and his co-workers have studied the selective isolation methods of soil actinomycetes. A new medium and a variety of ne…
Spectres de reflectance diffuse de smectites dans le proche infrarouge en relation avec la composition chimique. — Les spectres-de réflectance haute résolution de 12 smectites sélectionnées ont été réalisés dans le domaine du proche infrarouge (1,0 à 2,5 μm). Les teneurs en Al, Mg, Fe et Si de ces minéraux ont été dét…
処理条件によって多様に変化するポリアニリソの分子構造を分光学的に追跡し,四つの基本的分子構造～ イミノフェニレン構造(IP),そのドープされた状態(IP+),酸処理によって生成するアソモニウム塩構造およびキノノイド構造(NP)を同定し,ポリアニリンの分子構造として通念化していたエメラルディン構造[(IP)m-(NP)m-]はポリアニリンの分子形態の一つに過ぎず,適正な処理で極限的な還元処理を行うことにより完全な連鎖構造の白色のポリ(イミノフェニレン)の調製が可能である事を示した。このような知見に基づきy実質的にIP構造から成るポリアニリンとステンレススチールの集電体とが一体化した形態の電極材を電気化学的に作製しfこれを正極としたリ…
Mechanical properties of ZrSiO4 sintered bodies, fabricated from a synthesized high purity ZrSiO4 powder, were studied at various Si/Zr atomic ratios of ZrSiO4 by the observation of microstructures, The ZrSiO4 powder was prepared by calcining a homogeneous mixture of ZrO2 and SiO2 sols containing ZrSiO4 seed particles…
Agglomerated crystals of enoxacin were prepared by a novel spherical crystallization technique using ammonia diffusion system (ADS). This technique made it possible to agglomerate amphoteric drugs like enoxacin which could not be agglomerated by the conventional means. When an ammonia water solution of enoxacin was po…
Tertiary recrystallized grain-oriented silicon steel sheets with thicknesses from 80 mu m to 20 mu m were developed. Such ultrathin sheets were produced with appropriate cold rolling and annealing. The magnetic induction B/sub 8/ of the sheet was above 1.95 T and the coercive force H/sub c/ was below 7 A/m. The AC iro…
ABSTRACT Processing cotton at the gin to minimize machinery usage and maximize monetary retums requires a thorough understanding of the performance characteristics of individual machines. A database involving multiple moisture, trash, machine and cotton levels was developed for all routine and laboratory fiber propert…
This paper describes several of the nuclear materials research and development programs that have involved ferrous metallurgy. The research programs high-lighted are as follows: For light water reactors, corrections have been made for corrosion of coolant piping and irradiation embrittlement of pressure vessel steels.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystallographic studies on retinoidal-active and -inactive aromatic anilidesYoshiharu Toriumi, Atsushi Kasuya, and Akiko ItaiCite this: J. Org. Chem. 1990, 55, 1, 259–263Publication Date (Print):January 1, 1990Publication History Published online1 May 2002Published inissue…
The behaviour of blue phase III (BPIII) of chiral liquid crystals under the influence of an electric field has been studied for a mixture consisting of the chiral compound S811 and the nematic mixture EN18 exhibiting negative dielectric anisotropy εa < 0. As in one mixture with ε a < 0 studied previously, a dramatic i…
The A, B, C luminescence system from silicon is believed to originate with the radiative decay of an exciton bound to an isoelectronic trap. It was shown previously by Sauer, Weber, and Zulehner [Appl. Phys. Lett. 44, 440 (1984)] that nitrogen is one of the trap constituents. We present experimental evidence that conf…
In titanium alloys subsurface fatigue crack initiation occurs apparently without the existence of any defects such as inclusion or pore. We investigated subsurface crack initiation and sub-crack for Ti- 6Al-4V alloys at cryogenic temperatures, and discussed the growth mechanism of microcrack.As the maximum stress was…
Effect of plastic films contact (polyethylene, polypropylene and butylated hydroxy anisole (BHA) and butylated hydroxy toluene (BHT) incorporated polyethylene) on the storage stability of refined sunflower oil and groundnut oil was studied at 37°C. The changes in peroxide value, thiobarbituric acid and total carbonyls…
The world's first practical applications of 500 kV XLPE (cross-linked polyethylene) cables took place in 1988 at the Shimogo power station of the Electric Power Development Co. Ltd., and the Imaichi power station of the Tokyo Electric Power Co. Inc.. Research and development work on the cables had been conducted since…
The dislocation core structure of an (α/2) [110](1·0) edge dislocation has been computed in NiO using an atomistic description of the lattice. A shell model potential was used to describe the ionic interactions. The binding energies of the dislocation with vacancies of different charge states as well as with electroni…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStudies of model urethane reactions and cure in polyurethanes by UV absorption and fluorescence spectroscopyXiao Yan Huang, Weiching Yu, and Chong Sook Paik SungCite this: Macromolecules 1990, 23, 2, 390–398Publication Date (Print):January 1, 1990Publication History Publishe…
2014 Le bicristal de silicium contenant le joint de flexion 03A3=9 (122) [011] est utilis comme matriau modle pour tudier, l'aide de la microscopie lectronique haute rsolution, les mca- nismes de dformation l'chelle atomique. Les mystres des tout premiers stades de dformation du joint ont t lucids. On a montr que les…
Dynamic differential thermal analysis (DTA) data on a series of polyethylene (PE) samples containing known contents of two primary (phenol and amine) and two secondary (thioester and phosphite) antioxidants are presented. It is shown that the dynamic method, in which the temperature of the start of an exothermal oxida…