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。
Abstract The collagen of bovine striated muscle has been shown to be comprised of three genetically distinct types of collagen, the proportions of which vary from the tendon to the endomysium. Despite the variation in genetic type all three collagens are stabilised by lysine‐derived cross‐links. It is proposed that th…
Abstract The equivalent dipole model of the ring current shift in benzene is shown to be equivalent to that of the well‐known two current loop calculation. A network model of the ring current effect in the porphyrin system is described, using the double–dipole approximation, to give a calculation of the ring current s…
We report measurements of the hydrogen concentrations and densities of amorphous silicon films prepared from glow discharge plasmas of silane. Quantitative results are obtained from the resonant nuclear reaction 15N+1H→12C+4He+γ by counting the emitted γ rays. Mass spectrographic analysis of the gases evolved upon hea…
A Fortran minicomputer program for the collection of X-ray diffraction data from protein crystals is described. Data collection efficiency has been achieved by means of: ω step scans for reflection intensity, radial step scan along 2θ to estimate background intensity and preselected reflection files. The program inclu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe integral representation of the relaxation effects in mixed strong electrolytes in the limiting law regionShoon K. Kim and Lars OnsagerCite this: J. Phys. Chem. 1977, 81, 12, 1211–1212Publication Date (Print):June 1, 1977Publication History Published online1 May 2002Publi…
The electron-microscopic visualization of acrylic rubber dispersed in a heterogeneous structural resin composition consisting of a rubber-modified two-phase plastic comprising essentially a butyl acrylate rubber phase and an acrylonitrile–styrene copolymer phase, respectively, has been accomplished. This procedure con…
Summary The factors relating to the development of fenestration of the vertical‐lateral plate of the maximillary bone in the rabbit was studied by ontogenetic, comparative, phylogenetic and experimental materials. Normal developmental sequences showed that the trabecular bone pattern of the vertical plate is produced…
The microstructure of fibers is important to textile performance properties, but it is the pore structure and surfaces of pores that are critical to moisture regain, imbibed water, and the modification of fibers with finishes that must enter fibers in order to perform their function. In the case of cellulosic fibers,…
Covers advancements in spacecraft and tactical and strategic missile systems, including subsystem design and application, mission design and analysis, materials and structures, developments in space sciences, space processing and manufacturing, space operations, and applications of space technologies to other fields.
Abstract not Available.
Measurements of rotational viscosity in the various liquid crystalline phases of TBBA (terephthal-bisbutylaniline) are reported. The quantity measured is the viscous energy dissipation in the liquid crystal as it oscillates in a magnetic field. This dissipation varies greatly in the different smectic phases. It is sma…
Abstract Darstellung und Kristallaufbau für das kupferrote Rubidiumsuboxid Rb 9 O 2 werden beschrieben. Die Verbindung besteht aus Ionengruppen der gleichen Zusammensetzung, die metallisch aneinander gebunden sind. Durch Vergleich der Röntgendaten wird nachgewiesen, daß der Hauptanteil des mehrfach als „Rb 3 O”︁ besch…
The interaction of myosin subfragment-1 (S-1) with 4,4'-bis(1-anilinonaphthalene 8-sulfonate) (bis-ANS) has been studied by monitoring the fluorescence of the latter when the two components form a complex. Because ATP and ATP analogs partially displace complexed bis-ANS it has also been possible to study interactions…
The need for partial discharge (corona) measurements at very low frequencies is explained, and the results of tests on epoxy resin and polyethylene samples are given for the frequency range 0.1 Hz to 50 Hz. As no suitable commercial generator was available, a new type of low-frequency low-noise generator has been deve…
A molecular theory of cholesteric liquid crystals is presented. By means of symmetry considerations we obtain a general form of the intermolecular potential containing chiral contributions, which are then shown to be responsible for forming the cholesteric phase. The temperature dependence of the cholesteric pitch is…
The morphological aspects of biosynthesis of cellulose by Acetobacter xylinum and Acetobacter acetigenus were studied by transmission electron microscopy of both freeze-etch replicas and sections of cellulose-free cells in suspension culture before and subsequent to the induction of cellulose synthesis. Also examined…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLuminescence quenching of dicyanobis(2,2'-bipyridine)ruthenium(II) and dicyanobis(1,10-phenanthroline)ruthenium(II) by transition metal complexesJ. N. Demas, J. W. Addington, Steven H. Peterson, and E. W. HarrisCite this: J. Phys. Chem. 1977, 81, 11, 1039–1043Publication Dat…
The experimental results pertaining to the electronic structure of covalent amorphous semiconductors are briefly reviewed. It is found that three classes of materials exist, depending on the lowest-energy coordination of the predominant chemical component. In each case, the transport properties are ordinarily controll…
Magnetic measurements on the single crystal RGa intermetallic compounds (R=Pr, Nd, Sm, Tb, Dy, Ho and Er) have been carried out in the 4.2 K to 350 K temperature range. All the compounds, except ErGa, are ferromagnetism with high coercive force along the easy direction. ErGa compound is antiferromagnetism. The magneti…
Klebsiella pneumoniae ATCC 25955 (formerly named Aerobacter aerogenes PZH 572, Warsaw), which is known to produce coenzyme-B12-dependent glycerol dehydratase when grown anaerobically in a glycerol medium, formed coenzyme-B12-dependent diol dehydratase in a 1,2-propanediol-containing medium. Both the diol dehydratase a…