Materials Literature
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Observations are reported of the run of TiO band strength (7120 A) with effective temperature for stars at the tip of the giant branch in globular clusters. At temperatures for which the band is strong in field giants, TiO is undetected in clusters of intermediate metallicity. For this result reddening corrections are…
Relative values of thermospheric photoelectron energy distributions between 2 and 100 eV were measured over the altitude range 100–220 km by using a 127° cylindrical electrostatic deflection analyzer flown on a rocket. The measured photoelectron spectra display distinct features that are theoretically predicted (Victo…
The spin configuration was studied by means of magnetic torque measurements on single crystals of manganese substituted orthoferrites, YFe 1- x Mn x O 3 where 0≤ x ≤0.55, at temperatures between 77 K and 450 K. Spin reorientations were observed in the samples containing more than x =0.1. It was concluded that the anti…
The fracture toughness of 0/90° cross ply boron reinforced aluminum composites has been investigated using prenotched compact tension and center notched tensile specimens. The effects on fracture toughness of specimen geometry, the relative numbers of 0° and 90° plys, and the lay-up sequence, have been measured. Ply l…
Various states of relaxation of the plain weft-knitted structure are discussed in relation to fabric dimensions. An experimental investigation of dimensions in the wet-relaxed state shows that, in addition lo being dependent on the stitch length, these are also a function of the yarn diameter. A discussion of the poss…
Abstract A quenchable high pressure modification of In 2 S 3 was prepared at 35kbar and 500 °C. ε-In 2 S 3 (Space group R3̅c, a = 656,1 pm, c = 1757.0 pm, Z = 6) is isotypic with Lu 2 S 3 (Corundum type structure).
4-Chloro-2-hexene can be considered a model compound for the chlorinated allylic structure appearing in PVC chains after dehydrochlorination. This model compound was used to elucidate the mechanism of reaction of primary or secondary stabilizers.
THE FUNCTION OF THE PALLIAL ORGANS OF BIVALVES IN CONTROLLING INGESTION Get access Journal of Molluscan Studies, Volume 44, Issue 1, April 1978, Pages 83–99, https://doi.org/10.1093/oxfordjournals.mollus.a065419 Published: 01 April 1978 Article history Received: 13 April 1977 Published: 01 April 1978
The temperature dependence of T 1 and T 2 relaxation times of 93Nb nuclei in octahedral [NbCl n Br6-n ]-(n = 0 to 6) complexes contained in acetonitrile solution is measured. The relaxation rate is found to be controlled by quadrupole interactions in all complexes except cis-[NbCl3Br3]-. The relaxation mechanism in ci…
Uppermost Messinian dolomitic mudstone with intercalated biogenic siliceous ooze in both Sites 124 (today at a water depth of 2726 m) and Site 374 (today at a water depth of 4090 m) contain a low diversified, autochthonous, almost monospecific, brackish, planktonic diatom assemblage, indicating a salinity range from O…
Abstract The thermal decomposition of the kaolinite: N -methylformamide intercalate [Al 2 Si 2 O 5 (OH) 4 ·HCONHCH 3 ] has been studied by differential scanning calorimetry (DSC). The decomposition starts at 355 K, finishes at 450 K and follows Avrami-Erofeev kinetics for α = 0.04–0.96. Δ H for the loss of organic is…
An analysis is presented of a model of plain weft-knitting subjected to uniaxial loading in either direction and also to biaxial loading. For each case, calculated load–extension curves, which are given for a range of values of fabric tightness, illustrate biaxial fabric deformation. Each curve shows a marked dependen…
Stabilizers, R2SnX2, react with allylic chlorine atoms during the induction period and also absorb HC1 to give XH molecules which add to double bonds. Changes in R which facilitate Sn-C bond cleavage are unfavorable, but γ-carbonyl groups are beneficial.
Abstract Several new salt intercalation complexes of halloysite have been prepared and characterized using X-ray powder diffraction techniques taking into account both the position and the shape of the d 001 peaks. The amount of intercalated ion in some fully complexed halloysites has been directly determined using co…
Magnetostriction of fcc Fe–Ni alloys was measured by means of the paper strain gauge in the temperature range of 4.2 K to 296 K. The temperature dependence of spontaneous magnetostriction constant λ 111 was positive, while λ 100 was negative for all the alloys in the whole temperature range. The composition dependence…
In this paper, we report the changes in physical properties of polycarbonate caused by absorbed water and supply basic data for the application of this effect. Absorbed water increases monotonously with increase in relative humidity. Along with the increase in absorbed water, the relaxation time of the β process incre…
The mathematical basis and methodology for determining the effective atomic number and electron density of a tissue are presented. Cranial computed tomography (CT) scanning is performed at two different energy levels, both with and without contrast enhancement. The histology of 15 brain tumors has been correlated with…
The electromigration characteristics of Al/Si alloys are presented. Below about 210°C the failure mode is an open circuit generated by grain boundary electromigration of Al in Al with an activation energy of 0.54 eV. At higher temperatures the failure mechanism transfers to the electromigration of Si in Al through dis…
Abstract In the Brooks‐Herring‐formula the scattering centres are assumed to be independent. The range of validity of this assumption is investigated. For this purpose the scattering of electrons by a pair of impurities is considered as a function of its internal separation and its orientation with respect to the elec…
Two models of a three-fold coordinated continuous random network (C.R.N.), originally constructed to simulate the structure of amorphous arsenic (Greaves and Davis 1974), have been converted by means of certain computer procedures into plausible structures of vitreous boron trioxide, B2O3. Using the original coordinat…