Materials Literature
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The ferromagnetic Curie temperature of EuO films has been increased by selective doping with trivalent rare-earth oxides. The electrical resistivity, which depends upon the temperature and has a broad peak at ≈100°K, decreases markedly to ≈10−1 Ω·cm with doping. A typical ferromagnetic Curie temperature, determined fr…
As part of a long range study to develop grades of steel with improved resistance to hydrogen-induced cracking, techniques for measuring hydrogen uptake and hydrogen permeability were investigated and these parameters were correlated with resistance to hydrogen-induced cracking at different strength levels. The steel…
The equilibrium P-T curves for the following have been determined: albite = jadeite + quartz; albite + nepheline = 2 jadeite; analcite = jadeite + water. The curves for albite = jadeite + quartz is P(bars) = 6800 + 18.6 T degrees C. The reaction albite + nepheline = 2 jadeite is shown by P(bars) = -4000 + 25 T degrees…
The self-diffusion of 14C in TiC0.67 was studied in the temperature range 1745°–2720°C. The diffusivity, which exhibits a discontinuity at 2080°C, can be represented by two expressions: D0.67*=(2.85±0.20)×10−4exp[−(49 600±300)/RT] cm2/sec above 2080°C and D0.67*=(1.14±0.66)×102exp[−(109,900±2000)/RT] cm2/sec below thi…
A method is described for location of proteins in bacteria. It depends upon two techniques. One technique is the inactivation of the protein by a reagent which is incapable of penetrating the bacterial membrane (permeability barrier). Proteins inside this membrane cannot be inactivated unless the cells are disrupted;…
The range of existence of the cubic phase in the system CaO‐ZrO 2 was determined at temperatures from 1300° to 1700°C, using the lattice parameter method. This technique could not be used at higher temperatures because of anomalous changes in the lattice parameter. The possibility of the existence of a compound, CaZr…
Abstract In continuation of an earlier preliminary study, some further physical and synthetic studies on the homogenous phase condensation of pyrrole and benzaldehyde to ms ‐tetraphenylporphin in acidic media were undertaken. The role of atmospheric oxygen in the reaction was studied in some detail. The effects of aci…
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…