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。
The present paper is concerned mainly with studies from my laboratory on regeneration of the lizard's tail. Over the past five years my students and I have focused our attention on: (1) a careful description of the histology of tail regeneration; (2) the role of neural elements (nerve and ependyma) in the initiation o…
The statistical relationships between surface chlorophyll concentration and the depth, chlorophyll content, and primary productivity of the euphotic layer have been investigated. They all proved to be statistically significant.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTManganese porphyrin complexes. III. Spectroscopy of chloroaquo complexes of several porphyrinsLaurence J. BoucherCite this: J. Am. Chem. Soc. 1970, 92, 9, 2725–2730Publication Date (Print):May 1, 1970Publication History Published online1 May 2002Published inissue 1 May 1970h…
The oxygen index method is shown to be a valuable tool for the investigation of the flammability of textile samples as a function of their chemical composition. Measurements of limiting oxygen index (LOI) are reported for polyester/cotton blends of varying composition, and for 50/50 polyester/cotton blends in which on…
Abstract Face rates of growth of ammonium and potassium dihydrogen phosphate crystals have been measured for crystallisation from pure solutions and from solutions that contained known amounts of foreign ions. The level of supersaturation and the solution pH both effect the crystal habit. Low supersaturation at normal…
Representations of the displacements and distortions produced by dislocation loops are given as Fourier integrals. These integrals are then reduced, to obtain solutions which are more explicit than any obtained previously, for the fields produced by infinite straight dislocations, a finite straight segment of a disloc…
Results obtained by Devin [J. Acoust. Soc. Amer. 31, 1654–1667 (1959)] for the damping constants of resonant bubbles are extended to the off-resonance case. Calculated results show for the range of conditions considered that thermal damping is important for bubbles driven below resonance, and radiation damping is impo…
Abstract Zinc adsorption was studied in suspensions of 10 calcareous Arizona soils in dilute ZnSO 4 solutions. At low concentrations, Zn 2+ adsorption was described by the Langmuir adsorption equation. The calculated Langmuir adsorption maxima were related to the carbonate and organic matter contents of the soils. Whe…
An analysis of the switching mechanism in semiconducting glasses is given which indicates that the actual switching involves electronic processes which prevent a thermal runaway. The rapid and reversible transition between the highly resistive and conductive states can have a thermal origin from Joule's heating of a c…
This paper describes the isolation from reduced collagen of two new amino acids believed to be involved, in their non-reduced form, as intermolecular cross-links stabilizing the collagen fibre. The reduction of intact collagen fibrils with tritiated sodium borohydride was found to stabilize the aldehyde-mediated cross…
The ferroelectric properties of a single crystal of Pb(Zn 1/3 Nb 2/3 )O 3 were investigated in the ferroelectric and paraelectric temperature regions. The crystal undergoes a ferroelectric phase transition in a wide temperature range, changing from cubic perovskite structure to rhombohedral one. A broad peak was obser…
Electromigration studies of large- and fine-grain aluminum films showed that fine-grain films were characterized by a mixed orientation and a grain size of ≈2 μ, and that large-grain films had a highly preferred 98% 〈111〉 orientation and a grain size of ≈8 μ. Stripes fabricated from the large-grained films had a consi…
CHAIN FOLDING is one of several unexpected features of long-chain polymer crystals that have come to light during the last decade or so. The polymers that exhibit these features are among our most important synthetic products—nylon and polyethylene, for example—and also abound in nature. The organization of their long…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTGrowth Rates of Aluminum Potassium Sulfate Crystals in Aqueous SolutionsG. D. Botsaris and E. G. Denk Jr.Cite this: Ind. Eng. Chem. Fundamen. 1970, 9, 2, 276–283Publication Date (Print):May 1, 1970Publication History Published online1 May 2002Published inissue 1 May 1970http…
Glasses containing 50 to 75 mol% SiO 2 and up to 35 mol% ZnO were studied using thermal expansion, density, molar volume, refractive index, molar refractivity, internal friction, and infrared absorption data. Increasing the zinc oxide content in the glasses decreased the thermal expansion and increased the density, re…
The angular intensity variation of elastically scattered electrons expelled from various shells in a NaCl crystal by Mg Kα and Al Kα radiation is reported. A discussion of some prominent features of the experimental results is presented.
Abstract The higher alkyl polyglucosides are a new class of nonionic surfactants which can be formulated to give properties ranging from soft greases to hard glassy water‐soluble solids melting from about 30 C to above 300 C and which are insoluble in common organic solvents. The aqueous solutions do not exhibit inver…
The critical field required to induce this transition in Fe-Rh alloys close to the equiatomic composition has been measured using pulsed magnetic fields up to 280 kOe. Measurements of the thermal expansion and high field magnetization have also been carried out. It is found that application of Kittel's theory of excha…
Experimental solubility runs using magnesite from Red Mountain (California) and Snarum (Norway), experimental results, geologic applications, stability relations, kinetic factors
Comparison is made between the electrical and thermal conductivities of solids and the transport properties of gases, with special reference to boundary limiting effects. The transition from continuum to molecular behaviour of gases is explored using a modified mean free path. Relative intermolecular and boundary coll…