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 Either of the two endothermic melting peaks found by differential thermal analysis of nylon 66 may be converted to the other by appropriate choice of annealing conditions. The two peaks are considered due to the melting of two morphological species, forms I and II. Form I is relatively fixed in melting temper…
The Preliminary Check-list of British Marine Algae (Parke, 1953), with three subsequent lists of additions and corrections (Parke, 1956, 1957, 1959), was superseded by the Revised Check-list of British Marine Algae (Parke & Dixon, 1964). Since the publication of the latter, changes, both taxonomic and systematic,…
1. The effects of acid mucopolysaccharides and acid mucopolysaccharide-proteins on the size and rate of formation of fibril aggregates from collagen solutions in pH7.6 buffers were studied by turbidimetric and light-scattering methods. 2. Serum albumin, orosomucoid, methylated cellulose, chondroitin sulphate A and cho…
The finite pertubation method developed in the first paper of this series is applied to isotropic nuclear-spin coupling constants, assuming that only a Fermi contact mechanism couples the electron and nuclear spins. Results for some simple systems are calculated using self-consistent molecular orbital methods involvin…
A rate of 0.3 failures per billion hours or less is desirable for memory components in large integrated arrays. This unusually stringent requirement complicates the determination of lifetime from accelerated aging studies. The value and limitations of step stress aging techniques are discussed in terms of experimental…
Masamichi Tsuboi, Minoru Terada, Teruo Kajiura; Raman Effect in Ferroelectric Sodium Nitrite Crystal, Bulletin of the Chemical Society of Japan, Volume 41,
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEnthalpy of formation of Nd2O3-hexagonalGeorge C. Fitzgibbon, Daniel. Pavone, and Charles E. HolleyCite this: J. Chem. Eng. Data 1968, 13, 4, 547–548Publication Date (Print):October 1, 1968Publication History Published online1 May 2002Published inissue 1 October 1968https://…
The corrosion behavior of plain carbon steel in high temperature water has been studied using electrochemical polarization techniques. The influence of oxygen, hydrogen, and ammonia on the corrosion behavior has been studied over the range < 0.1-100 ppm. Potentiostatic anodic polarization data indicate that onl…
Mass spectrometric investigations of the high temperature equilibrium vapor species over the solids Li 2 SO 4 , Na 2 SO 4 , K 2 SO 4 , Rb 2 SO 4 , and Cs 2 SO 4 have shown that the products of thermal decomposition are M(g), where M = Li, Na, K, Rb, or Cs, SO 2 (g), and O 2 (g). In addition, molecules like K 2 SO 4 (g…
The solubilities in water of dimagnesium phosphate trihydrate (MgHPO 4 ,∙3H 2 O), trimagnesium phosphate twenty-two hydrate (Mg 3 (PO 4 ) 2 ∙22H 2 O), and anhydrous trimagnesium phosphate (Mg 3 (PO 4 ) 2 ) were determined. The solubilities of these phosphates (pKsp) were found to be 5.83 ± 0.01, 23.70 ± 0.12 and 23.28…
The optical constants of V${\mathrm{O}}_{2}$ have been determined between 0.25 and 5 eV, both below and above the semiconductormetal transition temperature ${T}_{t}=340\ifmmode^\circ\else\textdegree\fi{}$ K. Reflectivity and transmission spectra have been measured on both single crystals and thin films. The reflectivi…
Abstract The solubility parameters of sixteen polymers have been determined by the turbidimetric titration method. The results agree well with the reported values obtained from swelling and viscosity measurements. The method is sensitive to the choice of nonsolvents and to small changes in the copolymer composition.
Abstract It is assumed that the propagating polymeric radicals have no diffusive mobility in the very highly viscous medium within latex particles. Chain growth takes place on a lattice when the polymeric radical reacts with a monomer present on a lattice site adjacent to that occupied by the reactive chain end. For t…
A systematic approach for finding new nonlinear optical materials is presented. The method is based on the use of the anharmonic oscillator model in conjunction with Miller's rule to estimate the second harmonic generation and electrooptic coefficients of a material, followed by an experimental measurement using a rec…
Samples of isotactic polypropylene have been crystallized at a pressure of 3.86 kbar and under a variety of crystallization conditions. These include isothermal crystallization at five different degrees of supercooling ranging from ΔT=70°C to ΔT=34°C and crystallization by slow cooling from 248°C. Each sample was stud…
Study of collagen composition and in vivo and in vitro collagen biosynthesis and maturation in 10-day-old carrageenan-induced granulomas from female guinea pigs demonstrated that old animals have decreased amounts of neutral salt and acid soluble collagen, decreased in vitro biosynthesis and turnover, and lower ratios…
Abstract LiAlSi 2 O 6 III (high-quartz solid solution) was found to be hexagonal, space group P 6 2 22 (or P 6 4 22), a = 5.217 ± 0.001, c = 5.464 ± .002 Å, Z = 1, D o = 2.395 and D c = 2.399 g/cm 3 . The bond lengths were determined with an accuracy of 0.001 Å for Si,Al–O bonds and 0.005 Å for Li–O bonds. The final R…
The vacuum evaporation rate of the (100) face of pure sodium chloride single crystals has been measured with a vacuum microbalance in the temperature range 450°–650°C. The steady-state vaporization rates of pure crystals with dislocation densities of ∼1 × 106/cm2 were lower by about a factor of two than the maximum th…
Abstract Analysis of Mossbauer effect in layer silicates provides a spectroscopic method for determining valences and coordination of iron. In this study Mossbauer spectra were obtained for amesite, cronstedtite, nontronite, two glauconites, biotite, lepidomelane, chlorite, minnesotaite, vermiculite. stilpnomelane, an…
The plain-knitted structure is shown to be a rationally determinate structure only in the fully-relaxed state; in any other state, the nature of the knitted loop is dependent on the yarn's physical properties, mechanical processing, and knitting variables. The fully-relaxed state is only found after the fabrics have b…