Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffect of Molecular Weight on Excimer Formation of Polystyrenes in SolutionTadahiro Ishii, Takashi Handa, and Satoru MatsunagaCite this: Macromolecules 1978, 11, 1, 40–46Publication Date (Print):January 1, 1978Publication History Published online1 May 2002Published inissue 1…
The compound erroneously reported as NN-bis(chloromethyldimethylsilyl)acetamide has been proven by single-crystal X-ray analysis to be (O–Si)-chloro-[(N-chlorodimethylsilylacetamido)methyl]dimethylsilane.
Abstract Manganese and cobalt ferrites were prepared by the air oxidation of aqueous suspension of Fe(OH)2 and either Mn(OH)2 or Co(OH)2 at 50–80 °C. In alkaline suspensions, all the metal ions are transformed into spinel ferrites, MxFe3−xO4 (M=Mn or Co), by a suitable combination of the oxidation temperature and the…
Use of tannic acid (TA), in sequence with ferric chloride, uranyl acetate or gold chloride resulted in staining of selective but sometimes different sites in paraffin sections. TA-uranyl acetate of TA-ferric chloride stained sites rich in complex carbohydrates, wherease TA-gold chloride stained the collagen of various…
The effect of aging on the temperature dependence of permittivity ( K ) and tan δ as a function of frequency was examined for both ferroelectric and antiferroelectric PLZT compositions. All compositions aged near their transition temperatures exhibited a marked decrease in dispersion between the aging temperature and…
The forced Rayleigh light scattering technique has been applied to measurements of thermal diffusivity in liquid crystalline phases. In the nematic phase of p-methoxy benzylidene p-n-butyl aniline (MBBA), our results are in good agreement with the data obtained by classical methods. The thermal diffusivity anisotropy…
(1978). Physiological indicators of nutrient deficiency in algae. SIL Communications, 1953-1996: Vol. 21, No. 1, pp. 34-41.
Liquid Crystalline Phenyl‐trans‐4‐n‐alkylcyclohexanecarboxylates The syntheses of p‐substituted phenyl‐trans‐4‐n‐alkylcyclohexanecarboxylates 1 – 12 and cyclohexyl‐p‐n‐alkylbenzoates 15 – 17 and their mesomorphic properties are described. p‐n‐Alkoxyphenyl‐trans‐4‐n‐alkylcyclohexanecarboxylates 1 – 8 exhibit larger the…
Three test methods for determining degree of sensitization in austenitic stainless steels have been investigated. The results clearly show that all three test methods are capable of detecting moderate-to-severe degrees of sensitization, but the electrochemical potentiokinetic reactivation technique is the most sensiti…
The generalized de Gennes model for the nematic to smectic-$A$ phase transition in liquid crystals with an order parameter with $\frac{n}{2}$ complex components is investigated using the $\ensuremath{\epsilon}$ expansion in the vicinity of four dimensions. It is found that anisotropic critical behavior with correlatio…
Comparative investigation of the process of the structure reordering of disordered implanted silicon layers after thermal (800°C, 30 min) and pulse laser annealing have been carried out. The new laser method of annealing implanted layers has a number of interesting features which provide great efficiency and locality…
To clarify the nature of the ferromagnetic interactions in SrRuO 3 , the Ru 4+ – –Ru 4+ exchange couplings in cubic-perovskite type ARu 4+ O 3 (A=nonmagnetic cation.) were investigated. Magnetic measurements were done on these sample oxides (including single crystals of CaRuO 3 ) by using a magnetic balance technique.…
The processes that occur at grain boundaries during high temperature creep at low strain rates have been studied by scanning electron microscopy of a fiducial grid and by transmission electron microscopy mainly of pure aluminium. These and other observations are interpreted in terms of a dislocation model for grain bo…
LALS is a computer program for the refinement of molecular structures. It is primarily intended for helical macromolecules but has applicability in other fields. The refinement uses as data, X-ray structure factors, usually from fibre diffraction studies, and/or stereochemical information, including a comprehensive sh…
Data are presented on the thermomechanical response and electrical conductivity of two commonly used epoxy materials, Narmco 5208 resin and RB 398 adhesive, as a function of increasing temperature. The overall conformity of the results shows that the second-order Ehrenfest-type glass transition temperature, designated…
Some electrochemical aspects of the stress corrosion cracking (SCC) behavior of HT 80 steel in a liquid ammonia (99.9%) at 30°C have been studied. The measurement of electrode potential was made in reference to the Pt electrode. The results obtained are as follows:(1) In liquid NH3 and NH3+0.5 wt%H2O, the “as-dipped”…
Potassium nutrition of tobacco on a potassium fixing alluvial soil A field experiment was conducted to study the effects of K‐fertilization on potassium uptake by tobacco and the K‐dynamics in an alluvial soil rich in clay and carbonate content. It was observed that the amount of exchangeable potassium and the concent…
The possibility of utilizing cloud point titrations for obtaining theta-cosolvent compositions for PVC solutions was examined for a range of THF—nonsolvent systems. Hansen's1–3 “radii of solubility spheres” were calculated for the various solvents and cosolvent solutions and compared with the observed solubility behav…
Abstract Stress‐temperature curves at constant strain‐rate have been summarized for steady‐state flow conditions of single crystals and polycrystals, and fields of dominating microscopic mechanisms were proposed.
Abstract A method is suggested for the determination of crystal‐solution interfacial tension σ on the basis of data obtained when studying the mechanism of a layer‐wise growth of the soluble‐salts crystals. The essential data for calculating the values of σ by this method are the height and distance of the individual…