Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAn efficient synthesis of .gamma.-methylene-.gamma.-butyrolactone (.alpha.'-angelicalactone). Application to the synthesis of deoxyobtusilactone and deoxyisoobtusilactoneRichard A. Amos and John A. KatzenellenbogenCite this: J. Org. Chem. 1978, 43, 4, 560–564Publication Date…
Di-n-butyl phthalate and other dialkyl phthalates are used as carbon sources by three Nocardia sp. isolates; mono-n-butyl phthalate is used as a carbon source by an Arthrobacter sp. isolate and a Pseudomonas sp. isolate. The compounds were metabolized in these organisms by hydrolysis to the corresponding monoesters an…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMechanisms of photochemical transformations of cross-conjugated cyclohexadienonesDavid I. SchusterCite this: Acc. Chem. Res. 1978, 11, 2, 65–73Publication Date (Print):February 1, 1978Publication History Published online1 May 2002Published inissue 1 February 1978https://pubs…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe high-spin(5T2) .dblharw. low-spin(1A1) transition in solid bis[2-(2-pyridylamino)-4-(2-pyridyl)thiazoleiron(II) dinitrate. Its dependence on time and on the previous history of the specimenG. Ritter, E. Koenig, W. Irler, and H. A. GoodwinCite this: Inorg. Chem. 1978, 17,…
A high speed photographic (106 frames per second) study has been made of the damage caused to soda-lime and borosilicate glasses by the impact of 1 mm diameter glass and steel spheres travelling at speeds up to 300 ms−1. For velocities up to 180 ms−1, in both glasses cone and radial cracks formed during the loading pa…
Tetramethylammonium tetrachlorozincate, {N(CH 3 ) 4 } 2 ZnCl 4 has been found to undergo successive phase transitions at about -112, -92, 3.3, 6.0 and 20°C and to show ferroelectricity along the a axis in the temperature range between 3.3 and 6.0°C.
The nature of Sb 2 O 5 , a matter of dispute to the present day, has now been elucidated by crystal structure analysis. The principles of coordination and connection accord with those of BNb 2 O 5 . This is the first such relationship between the pentoxide of a main group element and that of a subgroup element.
Abstract Depolymerization of poly‐ϵ‐caprolactam chips was carried out at low pressures (3–15 mm Hg) and elevated temperature (225°–270°C) in the presence of sodium hydroxide as catalyst. The effects of variation of amount of sodium hydroxide, time, temperature, and pressure on ϵ‐caprolactam yield were studied. With in…
A smoothing procedure is described which eliminates spurious details on crystallite-size distribution functions deduced from X-ray line profiles. It is based on a least-squares process with a stabilization scheme and is applied to composite specimens prepared by mixing known quantities of samples of nickel hydroxide,…
A multiple integral expansion of the Boltzmann superposition principle when applied to sinusoidal shear oscillations becomes σ(t)=γ0[G1′ sinωt+G1″ cosωt]+γ03[G3′ sinωt+H3′ sin3ωt+G3″ cosωt+H3″ cos3ωt]+γ05[0]. We have evaluated this constitutive equation with hollow cylinders of polycarbonate and polymethylmethacrylate…
The temperature variation of the separation of Shockley partials of single dissociated dislocations in Cu-6·44 at. % Al and Cu-13·43 at. % Al has been measured by means of in situ thermal cycling experiments in a high-voltage electron microscope; a weak-beam high-resolution imaging technique was used for the observati…
The intermetallic compound Fe 3 Sn 2 has been studied by Mossbauer spectroscopy and magnetisation measurements. This compound is ferromagnetic from approximately 220K to T c =657K. In this temperature range, the spin directions are close to or parallel to the c axis while at low temperature they are perpendicular to i…
Abstract The transition between the amorphous state and 3 crystalline modifications of poly(ε‐caprolactam) (polyamide‐6) has been investigated in Part 1 by IR spectroscopy. With these results as background the relation between heat of fusion Δ H * and specific volume v is now investigated as a function of crystallizat…
Abstract The hydrated form of tubular halloysite [halloysite (10 Å)] was observed by a conventional electron microscope equipped with an environmental cell (E.C.), by which the “natural” form was revealed without dehydration of the interlayer water. This study mainly reports the selected area electron diffraction (SAE…
The numerical solution of the Clausius-Mossotti problem for the permittivity of a suspension of perfectly conducting spheres in a cubic array is presented for sc, fcc, and bcc lattices. The results apply to electrical permittivity, magnetic permeability, electrical and thermal conductivity, and particle diffusivity. T…
The unmetamorphosed equivalents of the regionally metamorphosed clays and marls that make up the Alpine Liassic black shale formation consist of illite, irregular mixed-layer illite/montmorillonite, chlorite, kaolinite, quartz, calcite, and dolomite, with accessory feldspars and organic material. At higher grade, in t…
This investigation is concerned with the effect of chromium and molybdenum on the formation of the passive film of stainless steels, and its corrosion resistance to the chloride ion. The corrosion resistance to the chloride ion was estimated by the potential decay method and the measurement of the anodic polarization…
The crystal structures of the high pressure Ga(II) and Ga(III) forms of gallium were studied by single-crystal x-ray diffraction using a diamond anvil device. Ga(II) has a body-centered-cubic structure with a=5.951±0.005 Å and 12 atoms in the centered cell; Ga(III) has a body-centered-tetragonal cell with a=2.813±0.00…
The localization and synthesis of alphafoetoprotein (AFP) during mouse embryogenesis were studied by immunoperoxidase and by immunoprecipitation after radioactive labelling, using an antiserum prepared against AFP. AFP is first detectable in embryos on the 7th day of gestation (7th day embryos). In 7th and 8th day emb…
Abstract Reinforcement mechanisms of fiber‐glass reinforced plastics (FRP) under wet conditions are reviewed with emphasis on molecular structures of glass/matrix interfaces. Included are studies on glass surface, the glass/coupling agent interface, silane coupling agents on glass surfaces as well as in solution, the…