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 theortical relation between yarn-mass variation and the variation of yarn-spinning tension for open-end rotor-spinnig is derived, and it is shown experimentally that spinning-tension measurement represents a useful means of assessment of yarn irregularity.
The influence of various factors on Ostwald ripening was assessed from studies of a mixture of two monodisperse emulsions.Successive batches of small crystals were ripened onto large crystals under a given set of conditions, and the final habit of the larger crystals was determined from electron micrographs. Hence a p…
We have carried out calorimetric measurements leading to ΔH f 0 = −60 kcal mol −1 for Cr 3+ (aq). Further calorimetric measurements have led to enthalpies of reaction of Cr 3+ (aq) with HF(aq), Cl − (aq), Br − (aq), and SO 4 2− (aq) to form the 'inner sphere' complexes CrF 2+ (aq), CrCl 2+ (aq), CrBr 2+ (aq), and CrSO…
The Moelwyn-Hughes parameter, C1 = [d(1/β)/dP]T and temperature derivative of adiabatic compressibility have been computed for f.c.c. and b.c.c. type ionic crystals with the central-force rigid-ion interaction model, and various methods of calculation. Some applications of the Moelwyn-Hughes parameter are discussed. A…
The kinetics of isothermal oxidation of UC powder were studied at oxygen partial pressures between 7.0×10–−4 and 1.1×10–−2 atm in the temperature range from 400 to 1,400°C with use made of thermogravimetric techniques. Oxidation rates at the initial stage were observed to be linear against the reaction time for all th…
Abstract Die thermischen Ausdehnungskoeffizienten α P und die isothermen Kompressibilitäten β T von Acetylen, Chlorwasserstoff, Schwefelwasserstoff, Schwefeldioxid, Chlor‐Pentafluoräthan (CPFAE) und Chlor‐Trifluoräthylen (CTFAE) wurden in fester und flüssiger Phase gemessen. Die mit Festkörper‐ und Schmelzumwandlungen…
Abstract The morphology of organosilicon ladder polymers was studied by various methods, including x‐ray techniques, diffraction of monochromatic polarized light, and electron microscopy. The morphology is discussed as a function of the chemical composition, the molecular weight, and the method of preparation.
The perovskite-structured titanates and zirconates have been extensively investigated using infrared and Raman spectroscopy. However, very few papers have been published related to the vibrational spectra of hafnium-containing compounds. McDevitt and Baun reported the infrared absorption spectrum of hafnium dioxide, w…
The corrosion of expanded grids of lead‐antimony, lead‐calcium, and lead‐calcium‐tin alloys maintained at constant high float charge was measured metallographically. Linear growth rates were determined for oxide growth on all three alloys. X‐ray scans and maps served to locate the presence of at the interfaces and in…
<P>Abstract copyright UK Data Service and data collection copyright owner.</P> The <em>Annual Population Survey</em> (APS) is a major survey series, which aims to provide data that can produce reliable estimates at the local authority level. Key topics covered in the survey include education, employment, hea…
Experiments were conducted on the dynamic adsorption of tritiated water vapor, using a column packed with either silica-gel, activated alumina, or molecular sieve 5A. The column was 4 mm I.D. and 5–30 cm long. The runs were performed at 30°–70°C. Tritiated water vapor (HTO) was loaded into the column with a concentrat…
The unequivocal identification of mineral impurities in talc requires definitive analytical techniques due to the very similar structure of many naturally occurring silicates and the small quantities of associated minerals frequently found. The instrumental methods and techniques extant for this purpose are reviewed.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Effect of Temperature on the Cellulose/Water Interaction from NMR Relaxation TimesMichael F. Froix and Andreas O. GoeddeCite this: Macromolecules 1976, 9, 3, 428–430Publication Date (Print):May 1, 1976Publication History Published online1 May 2002Published inissue 1 May…
We first emphasize the original features of our integral formalism and of its numerical applications. We revue the most important results already published for the visible and the near ultraviolet. Then we report new numerical results for the very far ultraviolet and, taking them into account, we discuss the most effi…
The magnetization and principal magnetic susceptibilities of LuCr${\mathrm{O}}_{3}$ are measured from ambient temperature down to 4.2\ifmmode^\circ\else\textdegree\fi{}K. It is found that LuCr${\mathrm{O}}_{3}$ exhibits a weak ferromagnetic moment along the $a$ crystallographic axis below ${T}_{N}=111$\ifmmode^\circ\e…
Adenosinetriphosphatase (ATPase) [EC 3.6.1,3] activity has been found to exist in most preparations of DNA-dependent RNA polymerase [EC 2.7.7.6] obtained from Escherichia coli by a number of purification procedures so far established. Electrophoretic analysis on polyacrylamide gels demonstrated that ATP hydrolysis and…
Abstract This paper presents basic results obtained in the X‐ray investigation of liquid unbranched alkanes of type C n H 2n+2 and polyethylen (PE) melts of molecular weights from 86 (hexane) to 2.10 6 (PE) in the temperature range from 0to 350°C. The position of the maximum of the X‐ray scattering curve 2θ max , and…
Nuclear magnetic resonances of Y 2 (Fe x Co 1- x ) 17 and Y(Fe y Co 1- y ) 5 are observed at liquid N 2 temperature using the spin echo method. A different Y 2 (Fe x Co 1- x ) 17 NMR behavior from that of Y(Fe y Co 1- y ) 5 is interpreted by the existence of antiferromagnetic exchange interaction of the Fe–Fe pair, wi…
Several polycrystalline ceramics were fractured at room temperature and the fracture-mirror radii were measured. The slopes of curves of fracture stress versus (mirror radius)−1/2 correlate directly with Young's modulus. Comparison of results from strength tests and delayed-fracture tests failed to reveal a loading-ra…
The optical dielectric constant ε∞ of Pb1−xSnxTe has been measured for Sn fractions x of 0.0, 0.24, 0.36, 0.39, and 0.40 in the temperature range 6–120 K and at 300 K. The value of ε∞ increases from 33 for PbTe at 300 K to 60 for Pb0.61Sn0.39Te at 6 K. This maximum value appears to occur at a composition and temperatu…