Materials Literature
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The mesogenic properties of four series of compounds with the iso;hiocyanate terminal group are compared, viz.: 4-n-alkyl-4′-isothiocyanatobiphenyls /1/, 4–/trans-4′-n-alkylcyclohexyl/benzeneisothiocyanates /2/, isothiocyanatophenyl 4-n-alkylbenzoates /3 / and isothiocyanatophenyl 4-/trans-4′-n-alkylcyclohexyl/benzoat…
Two kinds of experiments, sporulation and growth experiments, were carried out to demonstrate the effect of cadmium on aquatic hyphomycetes. Oak (Quercus petraea L.) leaves were exposed in a hard-water stream (Lüssel, Swiss Jura) and a soft-water stream (Ibach, Black Forest) for 2 months. In the laboratory, fungal spo…
An experimental program on stress corrosion cracking (SCC) aimed at the development of a quantitative model for predicting the behavior of Inconel 600 tubing in high temperature water is currently underway at Brookhaven National Laboratory (BNL). Empirical data are gathered to relate factors that influence SCC. Work i…
The instrumental optimization conditions for most small-angle scattering experiments in which the data are azimuthally symmetric require that the scattered flight path be equal to the incident flight path. This is in contrast to a recent analysis which shows that under some conditions the incident and scattered flight…
Abstract The solid state morphology of chlorinated polyethylene (CPE)‐modified poly(vinyl chloride) (PVC) and the relationship of blend structure to impact strength and mode of fracture have been investigated. Selective staining of the CPE phase showed that the morphology of the two phase system changes with increasin…
Poly-beta-hydroxybutyrate (PHB) accumulates in individual cells of Alcaligenes eutrophus in the form of refractile bodies which alter the light-scattering properties of individual cells. Flow cytometry has been applied to measure the distributions of single-cell light-scattering intensity in Alc. eutrophus populations…
Electrochemical methods have been proposed as a nondestructive, quantitative means for determining the degree of sensitization associated with the chromium-depleted zones surrounding precipitates of chromium carbides in stainless steels. The use of one such method, the electrochemical potentiokinetic reactivation (EPR…
Uniaxially pressed pellets of cordierite‐type glass powders were sintered in air at 800°, 820°, 840°, and 860°C. There was pronounced anisotropy of shrinkage for these pellets composed of nonspherical crushed glass particles, and the initial axial shrinkage rate was one‐half that of the diameter, as though axial parti…
The sintering behavior of powder compacts formed from spherical, nearly monosized SiO 2 particles was investigated. Highly ordered compacts sintered to high density and translucency at 1000°C. In contrast, less homogeneous samples prepared from flocculated suspensions remained highly porous after sintering under the s…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLanthanide 4f .fwdarw. 4f electric dipole intensity theoryMichael F. Reid and F. S. RichardsonCite this: J. Phys. Chem. 1984, 88, 16, 3579–3586Publication Date (Print):August 1, 1984Publication History Published online1 May 2002Published inissue 1 August 1984https://pubs.acs…
Mo2(gly)4]Cl4.«H20,8 [Cr2(gly)4]X4-nH20 (X = Cl, Br),9 and [Rh2(0-ala)4] (C104)4-2H20.10One known exception to this "right, right, left, left" order is the compound [Mo2(gly)4]- (S04)2-4H20,'1 in which the order is "right, left, right, Left".It is notable that this compound is obtained by dissolution of the chloride s…
The pH of the solution from which the gel is precipitated determines the calcined zirconia crystal phase. Monoclinic zirconia is produced from materials precipitated in the 6.5 to 10.4 pH range; the tetragonal precursor is obtained for the 3 to 4 or 13 to 14 pH range. The calcination atmosphere, temperature history du…
Using an in situ substratum enrichment method, we assessed the effects of nutrient release from sand substrata on the community structure of attached diatoms in a sand-bottomed, northern Michigan stream. Sand from the stream bottom was washed, sterilized, and then consolidated into small plastic petri dishes with agar…
Interest in the synthesis of optically active smectic liquid crystals has increased considerably since the advent of a fast switching, bistable, electrooptic device configuration based on their ferroelectric properties. A number of structurally separate ferroelectric liquid crystal phases have been defined which posse…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotoinduced electron transfer in meso-triphenyltriptycenylporphyrin-quinones. Restricting donor-acceptor distances and orientationsMichael R. Wasielewski and Mark P. NiemczykCite this: J. Am. Chem. Soc. 1984, 106, 17, 5043–5045Publication Date (Print):August 1, 1984Publicat…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMolecular dynamics simulations of a supercooled monatomic liquid and glassJeffrey R. Fox and Hans C. AndersenCite this: J. Phys. Chem. 1984, 88, 18, 4019–4027Publication Date (Print):August 1, 1984Publication History Published online1 May 2002Published inissue 1 August 1984h…
Recently some mono-alkylated derivatives of β-D-glucopyranoside and thio-α-D-mannopyranoside were shown to exhibit liquid crystal properties. The structure of the phase produced by these materials was described as being of a layered smectic type. However, a full classification of the phase was not given. The present i…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffect of block copolymers at a demixed homopolymer interfaceJaan Noolandi and Kin Ming HongCite this: Macromolecules 1984, 17, 8, 1531–1537Publication Date (Print):August 1, 1984Publication History Published online1 May 2002Published inissue 1 August 1984https://pubs.acs.or…
Kaolinite crystallites, which are pseudohexagonal platelets, generally are found not singly but as intergrowths or aggregates of several platelets. Until recently only coarser intergrowths (Figs. 1-2) could be imaged with SEM in sufficient detail for intersectional relationships to be unambiguously interpreted. With n…
Ferrous sulphate BP, FeSO4,7H2O, dehydrates to form FeSO4,4H2O when the relative humidity (RH) is less than 65%, or on heating at 40 degrees C. The tetrahydrate was also prepared by recrystallization at 60 degrees C from aqeuous solutions of the sulphate. Commercial dried ferrous sulphate BP is FeSO4,H2O but the metho…