Materials Literature
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Abstract The viscosity of PVC plastisols is seen to be affected by numerous variables. Increase in concentration of the resin causes the viscosity to rise, with the increase being more abrupt at the higher concentrations. Deviation from Newtonian behavior also increases with concentration. Decrease in the size of part…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStudies of phosphazenes. 9. Reactions of (primary amino)chlorocyclotetraphosphazenes with dimethylamine: formation of "bicyclic" phosphazenesS. S. Krishnamurthy, K. Ramachandran, Arjun C. Sau, Robert A. Shaw, A. R. Vasudeva Murthy, and Michael WoodsCite this: Inorg. Chem. 19…
Two adult patients ingested an overdose of 2.4 g and 8.0 g of sotalol hydrochloride, respectively, i.e. 7-25 times the mean daily dose. Certain signs as bradycardia and hypotension were similar to those described for other beta-blocking agents. In addition to these, however, both patients had severe cardiac tachyarrhy…
The stable and metastable phase relations in the system Ph 2 SiO 4 ‐PhSiO 3 , were reexamined using Raman and ir spectroscopy to characterize the phases. Three stable phases, H‐Ph 2 SiO 4 , M‐Ph 2 SiO 4 , and M‐Ph 2 SiO 4 (alamosite) and four metastable phases, L‐Ph 2 SiO 3 , phase X , L‐PhSiO 3 and hexagonal PhSiO 3…
The recovery process of deuterium dissolved in excess in nickel was studied by means of the liquid hydrogen quenching and electrical resistivity measurement developed by the author. The diffusion coefficient of deuterium was determined as D =3.18 ×10 -3 exp (-9220/ R T ) cm 2 /sec between 220 K and 340 K, and compared…
The viscosity of a sodium borosilicate glass (SiO 2 70, B 2 O 3 23, and Na 2 O 7 wt%) was measured as a function of heat‐treatment temperature and time for phase separation. The viscosity was shown to approach an equilibrium value unique to the heat‐treatment temperature. The magnitude of the equilibrium viscosity inc…
A seeded growth method has been used to study the kinetics of crystallization of calcium sulfate dihydrate at various temperatures and at ionic strengths up to 0.6M. Under all conditions, the rate of reaction is proportional to the square of the relative supersaturation and is controlled by a surface process. The same…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermal decomposition of sodium carbonate perhydrate in the solid stateAndrew Knox. Galwey and William John. HoodCite this: J. Phys. Chem. 1979, 83, 14, 1810–1815Publication Date (Print):July 1, 1979Publication History Published online1 May 2002Published inissue 1 July 1979h…
The structures of Mn5Si3, Th6Mn23 andγ-brass are accurately derived from octahedra (Mn5Si3), tetrahedra and triangle-capping. The relationship between pyrochlore, Th6Mn23 and γ-brass is also derived.
The metalloid content dependence of zero magnetostrictive composition of an amorphous (FexCo1−x)100−y(Si0.4B0.6)y alloy in an as-quenched state is experimentally determined. The iron content (x) of the zero magnetostrictive composition was found to decrease with an increase in the metalloid content (y). The Curie temp…
It has been shown that a normal temperature distribution within a sample set can produce a log-normal failure rate in electromigration experiments if it is assumed that the equation tf=Aj−n exp(Ef/kT) holds for individual stripe lifetimes. It has also been pointed out that if σ’s determined under accelerated-stress co…
Abstract Since most Southeastern U. S. soils ate acid, crop yields can generally be improved by liming surface soil. However, it is not known if plants will respond to deep incorporation of lime. Field experiments were conducted on two soils (Rhodic Paleudult and Typic Paleudult) at three locations in central and sout…
Anodic nickel dissolution in acidic chloride solutions (constant ionic strengths of 1 and 5M) over a wide range of H + and Cl − concentrations has been investigated. Anodic dissolution in low [H + ]‐chloride solutions is accelerated by both Cl − and OH − with Tafel slopes of about 2.303 RT / F . On the other hand, ano…
The key features leading to low-energy grain boundaries in metals are discussed by reference to computer-simulated structures and geometrical analysis in terms of atom packing. Low energy is found to be associated with boundary structures consisting of relatively dense packing, and this can in turn be expressed in ter…
An experiment was carried out to investigate the preparation condition of anisotropic Ca system ferrite magnets with optimum magnetic and physical properties. Compositions were chosen according to the formula (CaO.nFe2O3)100-x(La2O3)x, wherexwas varied between 0 and 4.0, and n between 5.5 and 6.25. The optimum conditi…
A series of poly(alpha-amino acid)s with controlled chemical variations were investigated in order to assess the effect of different chemical moieties upon arterial thrombosis. The gross implant surface properties ranged from hydrophobic to hydrophilic ionic and nonionic. The materials were tested by implantation with…
Abstract Water‐insoluble carboxyl‐containing starches were prepared by grafting acrylonitrile onto a highly crosslinked starch followed by base saponification to convert nitrile groups into a mixture of carboxamide and carboxylate groups. Ceric ammonium nitrate or ferrous sulfate–hydrogen peroxide was used to initiate…
Abstract Effect of the concentration of four types of carbon black, namely, HAF, FEF, ISAF and GPF, on the electrical conductivity of SBR (1502) was studied. The anomalous behavior of conductivity [σ min in σ( T ) curves] becomes more pronounced as we approach a characteristic value of carbon concentration, F 0 , at w…
The low-temperature phases of the alkali hyperoxides K${\mathrm{O}}_{2}$, Rb${\mathrm{O}}_{2}$, and Cs${\mathrm{O}}_{2}$ have been investigated by means of electron paramagnetic resonance (EPR) and antiferromagnetic resonance (AFMR). The knowledge of their structural and magnetic properties could be enlarged substanti…
Spark-generated bubble behavior was observed in an unbounded fluid and in the vicinity of a wall, both for water and a polymer solution. The formation of the re-entering jet close to the wall is retarded in the presence of polymer additives.