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The two species of Eurycercus are largely allopatric in the Northern Hemisphere, glacialis tending to be peripheral in distribution in the far north, occurring only as far south as 51‐52° N in the outer Aleutians, Labrador, and the northern Kuriles. There are vigorous disjunct populations of unknown history in oligotr…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffects of the urea-guanidinium class of protein denaturants on water structure: heats of solution and proton chemical shift studiesJagdish C. Ahluwalia, Sankaran. Subramanian, T. S. Sarma, and D. BalasubramanianCite this: J. Phys. Chem. 1971, 75, 6, 815–820Publication Date…
The infrared spectrum between 4000 and 200 cm−1 of polycrystalline D2O2 at − 190°C corresponds to that of H2O2 indicating that the crystal structure and spiral chain coupling of excitons for each of the six normal modes are the same in D2O2 as in H2O2. At temperatures near − 100°C the crystal spectra of both H2O2 and…
Summary The main methods in use in laboratories for the microbiological assessment of surfaces are examined, viz. (1) the swab‐rinse, (2) the rinse, (3) the agar contact, and (4) the direct surface agar plating. The advantages and disadvantages of these are discussed and their suitability for particular purposes in th…
Summary The crystal structure of kilchoanite, Ca 6 (SiO 4 )(Si 3 O 10 ), has been determined from three- dimensional X-ray methods ( r = 0·089 on 348 independent reflections). It is closely related to that of γ -Ca 2 SiO 4 , which is olivine-like. In kilchoanite, slabs of γ -Ca 2 SiO 4 structure alternate with ones co…
The susceptibility of high purity Fe-Cr alloys containing 17 to 26% Cr and 0 to 1% Mo has been determined by the Huey test after subjecting the alloys to various heat treatments. The alloys are highly resistant to intergranular corrosion when 0.15 cm thick specimens are water quenched from temperatures between 954 C (…
Abstract The dislocation behaviour in deformed copper single crystals was previously shown to correspond to a lower local flow stress in the surface region than in the interior and the primary glide plane was found to undergo a characteristic bending in the surface region, reflecting a local excess density of unpaired…
In this paper we compute the change in the energy of a uniformly magnetized uniaxial platelet produced by the introduction of a cylindrical domain. Differentiation of the energy expression yields the translational force produced by gradients in plate thickness, material composition, or temperature. The force expressio…
A 46‐in core from the lacsutrine sediments beneath Mexico City was analyzed to establish a stratigraphic sequence of diatom assemblages for use in interpreting the climatic and limnologic history of ancient Lake Texcoco. Diatoms were found in nearly every 20‐cm sample interval, and several major zones were established…
Abstract An idealized model for flexible foam in tension is developed. The model includes large deformations and cell structure orientation before and after deformation. It is predicted that two quantities affect the initial modulus of an unoriented foam: the density and a cell structure parameter. Data for latex foam…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation of ruthenium nitrosyl complexes containing 2,2'-bipyridine and 1,10-phenanthrolineThomas J. Meyer and John B. GodwinCite this: Inorg. Chem. 1971, 10, 3, 471–474Publication Date (Print):March 1, 1971Publication History Published online1 May 2002Published inissue 1…
The nonlinear quasi-Poisson equation that describes static magnetic fields in saturable iron is solved approximately by minimizing the corresponding nonlinear energy functional. The minimization is performed by means of the method of finite elements, using firstorder elements and a quadratically convergent iterative s…
When a Cu surface is sputtered by ion bombardment under the condition that Mo atoms arrive at the Cu surface during sputtering an unexpected phenomenon can arise: The surface of the Cu target becomes covered with microscopic cones. The cone density increases with increasing flux density of arriving Mo atoms. When the…
Lattice dynamics has some claim to being the oldest branch of solid state physics. Planck's Theory of Radiation and the Theory of Specific Heat was published by Einstein in 1907, On Vibrations in Space Lattices by Born and von Karman in 1912, and On the Theory of Specific Heat by Debye in the same year. Other early pa…
Abstract The glycerides 2‐oleodipalmitin (POP) and 2‐elaidodipalmitin (PEP) were synthesized and their melting behavior and dilatometric properties were determined. Three mixtures of POP with PEP were examined. Five polymorphs of POP and four of PEP were identified by x‐ray diffraction patterns. Rates of transformatio…
Untreated and chemically modified cotton fabrics which had been laboratory-abraded by machine-washing and tumlle drying were studied with the scanning electron microscope. Generally, abrasion patterns were not different from those normally associated with any wet or dry abrasion. Greater differences were observed betw…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCoordination effects on the spectrum of uranium(IV) in molten fluoridesLouis M. TothCite this: J. Phys. Chem. 1971, 75, 5, 631–636Publication Date (Print):March 1, 1971Publication History Published online1 May 2002Published inissue 1 March 1971https://pubs.acs.org/doi/10.102…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMicromeritics Instrument CorporationCite this: Anal. Chem. 1971, 43, 3, 44APublication Date (Print):March 1, 1971Publication History Published online23 May 2012Published inissue 1 March 1971https://doi.org/10.1021/ac60298a734RIGHTS & PERMISSIONSArticle Views10Altmetric-Citat…
Abstract It is shown that various modulus values of carbon black reinforced rubber are functions of the product of the actual black loading and a structure dependent factor. The structure factor appears to be a linear function of the so-called 24M4 value of the dibutylphthalate absorption and is independent of elongat…
Abstract The optical and transport properties in the paramagnetic phase of α‐RuCl 3 are studied here for the first time. Values are reported for the dc conductivity of single crystals over the temperature range 110 to 500 °K in the two crystallographic directions, along and perpendicular to the optic c ‐axis: at 300 °…