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。
Phycologists have long recognized that there are algae which grow only in torrents, or at least grow best in rapidly running water. Among these are Lemanea, Hildenbrandtia, Audouinella, Batrachospermum spp., Hydrurus, and Cladophora spp. Microscopic types are represented by Gongosira, Lithoderma, Chamaesiphon, and sev…
Abstract SP rubbers give greater latitude in extrusion and calendering processes by extending the range of operating conditions and giving greater scope for compounding for good physical properties. Compounds based on SP rubbers extrude smoothly with lower die swell at lower temperatures and higher viscosities. Greate…
The effect of water content on the corrosion resistance of a proprietary borosilicate glass is discussed. Several glass smelting methods were employed to produce an alkali borosilicate glass with various amounts of water within the body of the glass. Infrared studies in the region 2.7 to 3.0 P showed that a decrease i…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHydrogen Cyanide Stability and Heat of Polymerization.E. H. Gause and P. D. MontgomeryCite this: J. Chem. Eng. Data 1960, 5, 3, 351–354Publication Date (Print):July 1, 1960Publication History Published online1 May 2002Published inissue 1 July 1960https://pubs.acs.org/doi/10.…
The dielectric properties of some twenty solid solution systems based on sodium niobate are described, the additives being classified into ABO 3 , AB 2 O 6 , and A 2 B 2 O 7 types. Properties of the systems NaNbO 3 ‐BaTiO 3 , NaNbO 3 –SrTiO 3 , and NaNbO 3 ‐Sr 2 Ta 2 O 7 are described in some detail. A composition in…
ADVERTISEMENT RETURN TO ISSUEArticleNEXTTHEORETICAL PATHWAYS FOR THE REDUCTION OF N2 MOLECULES IN AQUEOUS MEDIA: THERMODYNAMICS OF N2Hn1Norman BauerCite this: J. Phys. Chem. 1960, 64, 7, 833–837Publication Date (Print):July 1, 1960Publication History Published online1 May 2002Published inissue 1 July 1960https://pubs.…
Measurements have been made of the thermal conductivity and thermoelectric power of a range of single crystal samples of p- and n-type B1 2 Te 3 between 6 and 200 K. The observed lattice conductivity could be interpreted in terms of scattering by the tellurium isotopes. Measurements on the iodine doped samples showed…
Craters were produced by firing spherical steel projectiles of 316- and 932−in. diam into sandstone and granite at velocities ranging from 300 to 6000 ft/sec. Impact angles of 30, 60, and 90 deg were used for the sandstone and 90 deg for the granite. The craters are formed by two mechanisms: (a) crushing of material i…
Vibrational frequency distributions for the potassium and rubidium halides and for cesium fluoride have been evaluated on the basis of the Born lattice theory by the use of Blackman's numerical sampling method. Both room-temperature and extrapolated 0°K parameters have been used in the calculation. Specific heats, the…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTContribution to the Structure of the Ferrichrome Compounds: Characterization of the Acyl Moieties of the Hydroxamate Functions1,2Thomas Emery and J. B. NeilandsCite this: J. Am. Chem. Soc. 1960, 82, 14, 3658–3662Publication Date (Print):July 1, 1960Publication History Publis…
Abstract The ringed structure in polyethylene spherulites was investigated by an x‐ray microdiffraction method. A spherulite with extinction rings whose interval is about 50 μ was observed when viewed under the polarization microscope. An asymmetric x‐ray diffraction fibrous pattern about the b axis was obtained for t…
Abstract Polyvinyl chloride deteriorates primarily by a zipperlike elimination of hydrogen chloride from the polymer and the concomitant formation of a colored and easily ozidizable polyene chain. Baum and Wartman have shown that the elimination is initiated by the rupture of certain especially labile carbon‐chlorine…
An attempt is made to systematize the valence orbital structures of the boron frameworks in MB2, MB4, MB6, MB12, B12C3, and elementary boron.
Th e polymorphi c relatioll ships of t he pure rare-carlh oxides have been r ei nves tigated us ing X-ray diffrac tion methods for ident ificat ion of phases. The ox ides of the t rivalen t rare eart h ions crystalli ze in t hree different typ es: A rt B, and C. Each oXIde has o nly one t ruly stab le polymorph: La203…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKINETICS OF HYDROLYSIS OF POLYETHYLENE TEREPHTHALATE FILMSR. C. Golike and S. W. Lasoski Jr.Cite this: J. Phys. Chem. 1960, 64, 7, 895–898Publication Date (Print):July 1, 1960Publication History Published online1 May 2002Published inissue 1 July 1960https://pubs.acs.org/doi/…
Selected mixtures in 21 binary and 9 ternary rare-earth oxide systems were studied by X-ray diffraction after heat treatment at 1,650° C and above. Two graphs were drawn to show specific regions of stability for the various structure types. Each gives the average ionic radius of constituent cations versus the mole per…
The magnetic structure of ${\mathrm{Mn}}_{4}$N has been determined by neutron diffraction from powders. The cubic unit cell has Mn at the corner and face centers and N at the body center. Standard diffraction techniques led to four possible models and it was necessary to perform polarized neutron beam experiments to r…
Abstract A theory for the shear degradation of high polymers is presented. It assumes the molecules to exist in the rubbery or liquid state and does not include the effects of chemical reactions which might occur subsequent to chain rupture. The computation shows that the entanglements along the chains play a major pa…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Thermal Copolymerization of Amino Acids Common to Protein1Sidney W. Fox and Kaoru HaradaCite this: J. Am. Chem. Soc. 1960, 82, 14, 3745–3751Publication Date (Print):July 1, 1960Publication History Published online1 May 2002Published inissue 1 July 1960https://pubs.acs.or…
The role of the twin planes in the rapid dendritic propagation of germanium crystals is examined on the basis of corner nucleation. A model is proposed, and it is shown that at least two twin planes must be present for continued easy propagation in <211> directions, in good agreement with experimental ob…