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。
Observations of photoabsorption in La, ${\mathrm{La}}_{2}$${\mathrm{O}}_{3}$, Ce, and Ce${\mathrm{O}}_{2}$ in the vicinity of the $3d$ edges are given. Calculations of relative absorption intensities for Ce are shown to correspond well with the experimental data.
Numerous polyethylene (PE) and crosslinked polyethylene (XLP) cable samples recovered from the field after one to seventeen years of service have been studied in relation to treeing phenomena. Special test circuits for laboratory growth of electrical and electro-chemical trees have been developed. Based on numerous te…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAromatic radical cation formation on the intracrystal surfaces of transition metal layer lattice silicatesT. J. Pinnavaia, Peter L. Hall, Sharmaine S. Cady, and M. M. MortlandCite this: J. Phys. Chem. 1974, 78, 10, 994–999Publication Date (Print):May 1, 1974Publication Histo…
Abstract Unregenerated-cellulose-fiber-elastomer composites with widely varying properties can be obtained. The properties depend on the type of elastomer used as the matrix, the fiber concentration, fiber aspect ratio, and fiber orientation. The fibers must be bonded to the matrix elastomer to obtain good strength. C…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLanthanide nitrate complexes of some macrocyclic polyethersR. B. King and Paul R. HeckleyCite this: J. Am. Chem. Soc. 1974, 96, 10, 3118–3123Publication Date (Print):May 1, 1974Publication History Published online1 May 2002Published inissue 1 May 1974https://pubs.acs.org/doi…
A continuous random network with three-fold coordination has been constructed. The radial distribution function and density have been measured end the coherent scattered intensity computed. The agreement between these and experimental results for amorphous As is good.
The long-range order, $M(T)$, in $\ensuremath{\beta}$-brass has been measured by neutron diffraction from a small extinction-free crystal. The results agree with those obtained recently by x-ray diffraction. Near ${T}_{c}$ our data are in accordance with a power law $M(T)=D{(1\ensuremath{-}\frac{T}{{T}_{c}})}^{\ensure…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthetic and nuclear quadrupole resonance study of chlorodiiodinium hexachloroantimonate(V), I2Cl+SbCl6Don J. Merryman and John D. CorbettCite this: Inorg. Chem. 1974, 13, 5, 1258–1260Publication Date (Print):May 1, 1974Publication History Published online1 May 2002Publishe…
Generalized Brewster-angle conditions for either the s or p plane of polarization are derived for periodic quarter-wave multilayers on a substrate, when the two layers of the basic period are matched to have equal effective optical thickness. By use of these relations, graphs for the design of reflecting polarizers fo…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIsomerization Polymerization of 1,3-Oxazine. II. Kinetic Studies of the Ring-Opening Isomerization Polymerization of Unsubstituted 5,6-Dihydro-4H-1,3,-oxazineTakeo Saegusa, Shiro Kobayashi, and Yoshitomi NaguraCite this: Macromolecules 1974, 7, 3, 265–272Publication Date (Pr…
The low te mpe r ature viscos iti es of three glasses es tabli shed as. viscosit y sta nd a rds a t th e Nati onal Bureau of Stand ard s are re ported. Th e data overla p res ults which a pp ear on th e published certificates be tween 10" a nd 10" poise and prese nt exte nsive meas ure ments up to 10 '0" poise. The me…
We show that a "phase diagram" for the conformational states of proteins can be constructed using the mathematical theory of singularities of functions developed recently by René Thom. For proteins subjected to the disruptive influences of temperature and/or concentration of denaturing agent, this theory can be used a…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCounterion binding by poly(vinyl sulfonate)John Hen and Ulrich P. StraussCite this: J. Phys. Chem. 1974, 78, 10, 1013–1017Publication Date (Print):May 1, 1974Publication History Published online1 May 2002Published inissue 1 May 1974https://pubs.acs.org/doi/10.1021/j100603a01…
Glasses are readily made from compositions containing up to 45 mol% PbO. The deviation of molar volume from ideality plotted vs composition shows a broad minimum at 70 to 80 mol% GeO 2 , similar to the behavior of the alkali‐GeO 2 glasses, indicating that the change in coordination of the Ge 4+ ion from 4‐ to 6‐fold o…
Abstract When ultrasound is applied to a liquid reacting system, the reaction rates are often increased. The application of ultrasonics, therefore, provides additional modes of accelerating the reaction rates which are usually not considered by conventional mechanisms. In an attempt to study the effect of ultrasonics…
Abstract Four soil profiles were sampled along a 550‐m toposequence traverse in São Paulo State, Brazil and were characterized with physical, chemical, mineralogical, and micromorphological analyses. The soils were classified and hypotheses were developed concerning their genesis based on soil differences observed. Th…
Abstract The spectral position of the absorption edge of n‐type Bi 2 Se 3 , single crystals was determined from reflectivity measurements on cleavage planes at nearly normal incidence of the radiation (E ⊥ c). A small reflectivity peak yields a maximum of the real part n 2 ‐ k 2 of the dielectric constant, which is co…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermolysis of Poly[bis(trifluoroethoxy)phosphazene]H. R. Allcock and W. J. CookCite this: Macromolecules 1974, 7, 3, 284–290Publication Date (Print):May 1, 1974Publication History Published online1 May 2002Published inissue 1 May 1974https://pubs.acs.org/doi/10.1021/ma60039…
Secondary electron yields δPE due to primary electrons of kilo-electron-volts are estimated for various metals by measuring total electron yields δT in an UHV system and using a Monte Carlo calculation to derive δPE from δT. The dependences of δT/δPE as well as δPE on both the atomic number Z and primary energy are al…
We have partially purified homoserine kinase from a genetically derepressed strain of Escherichia coli K-12. The optimum pH of the enzyme-substrate reaction was 7.8 and the K(m) values for l-homoserine and adenosine 5'-triphosphate were both 3 x 10(-4) M. K(+) (or NH(4) (+)) as well as Mg(2+) were required for its act…