Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTResonance Raman spectra and vibrational modes of iron(III) tetraphenylporphine .mu.-oxo dimer. Evidence for phenyl interaction and lack of dimer splittingJ. M. Burke, J. R. Kincaid, and T. G. SpiroCite this: J. Am. Chem. Soc. 1978, 100, 19, 6077–6083Publication Date (Print):…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCalculation of Three-Dimensional Elastic Constants of Polymer Crystals. 2. Application to Orthorhombic Polyethylene and Poly(vinyl alcohol)Kohji Tashiro, Masamichi Kobayashi, and Hiroyuki TadokoroCite this: Macromolecules 1978, 11, 5, 914–918Publication Date (Print):Septembe…
Abstract The 13 C nmr chemical shifts of the common amino acid residues were measured in D 2 O solutions of the linear tetrapeptides H‐Gly‐Gly‐X‐ L ‐Ala‐OH. For Asp, Glu, Lys, Tyr and His, the titration shifts arising from the ionization of te amino acid side chains were also obtained. These data are compared with the…
Beryllium sulfate tetrahydrate (BeSO4⋅4H2O) has been found to be phase matchable for frquency doubling of 5321-Å radiation. The water white crystal is highly transparent from 1900 to 13 700 Å. The nonlinear optical constant was measured to be d36(BeSO4⋅4H2O) = (0.62±0.06) xd36(KD*P).
ABSTRACT The marine epizoie diatom, Pseudohimantidium pacificum Hustedt & Krasske, is reported for the first time in Florida Current waters of the Western North Atlantic Ocean off the east coast of Florida. The diaom was fround attached to indivieuals of copepod species in the orders Harpacicoida and Cyclopida.
Partial discharges in transformers cause high frequency (ultrasonic) pressure pulses to propagate through the insulating media. These are similar in character to stress waves propagated in solids during crack formation (acoustic emission). The techniques involved in the detection of acoustic emission (AE) are shown to…
Twelve freshwater and/or brackish water species of the generally regarded marine planktonic diatom genus Thalassiosira are known. The morphology based on light and electron microscopy, taxonomy, and distribution of six of them are discussed. The new combinations Thalassiosira faurii (Gasse) Hasle and T. rudolfii (Bach…
The corrosion of 90:10 Cu:Ni and 70:30 Cu:Ni alloys in flowing seawater (1.62 m/s) has been studied as a function of oxygen concentration using the linear polarization, ac impedance, and potential step methods for measuring the polarization resistance. The high nickel alloy is found to be more corrosion resistant than…
The purpose of this study was to determine the forces in the glenohumeral joint for isometric abduction (including all directions of rotation) in the plane of the scapula. The lines of actions of muscles were obtained from 3 upper quarter specimens, electromyographic data was used, as well as geometrical parameters of…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectron spectroscopy for chemical analysis studies of lead sulfide oxidationD. S. Zingg and David M. HerculesCite this: J. Phys. Chem. 1978, 82, 18, 1992–1995Publication Date (Print):September 1, 1978Publication History Published online1 May 2002Published inissue 1 Septembe…
Summary Analyses of glauconites and celadonites from continental sedimentary rocks and sea-floor basalts using X-ray diffraction, electron probe microanalysis, infra-red spectroscopy, and X-ray fluorescence spectroscopy are reported. The minerals are shown to be distinct species; each an isomorphous replacement series…
The effects of annealing conventionally sintered, hot‐pressed, and reaction‐sintered Sic have been investigated by optical and transmission electron microscopy. In conventionally sintered and hot‐pressed bodies, “composite” grains consisting of α‐SiC plates sandwiched between recrystallized β‐SiC envelopes grow rapidl…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Onset of Entangled Behavior in Semidilute and Concentrated Polymer SolutionsJ. KleinCite this: Macromolecules 1978, 11, 5, 852–858Publication Date (Print):September 1, 1978Publication History Published online1 May 2002Published inissue 1 September 1978https://pubs.acs.or…
The experimental manifestations of dispersive (non-Gaussian) transient transport in disordered solids are discussed and compared with the predictions of theoretical treatments. The mathematical equivalence of the two theoretical approaches based on the formalisms of continuous-time random-walk (CTRW) and generalized m…
Pocos temas de un contenido tan específico y delimitado dentro del campo de la Durabilidad del Hormigón, entendida como resistencia química del material, han .tenido tanta difusión y han despertado tanta curiosidad, e incluso tanto interés en tan poco tiempo, como el de la reacción expansiva árido-álcalis, o álcali-ag…
La palabra cemento sirve para designar cualquier sustancia con capacidad adherente, mientras que el término conglomerante se aplica a la acción de aglutinar en un todo partículas que anteriormente estaban sueltas o independientes. Según su capacidad o no de endurecer bajo agua, los conglomerantes se clasifican en hidr…