Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDesign and synthesis of new ferroelectric liquid crystals. 14. An approach to the stereocontrolled synthesis of polar organic thin films for nonlinear optical applicationsDavid M. Walba, M. Blanca Ros, Noel A. Clark, Renfan Shao, Michael G. Robinson, Jian Yu Liu, Kristina M.…
Boron-doped diamond epitaxial films were characterized on the dependence of boron concentration by an optical microscope, reflection high-energy electron diffraction, secondary ion mass spectrometry, Hall effect measurement and metal contacts. These films were grown on synthesized single-crystal diamonds(100) by micro…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTheoretical and experimental study of diamagnetic and paramagnetic products from thermal and light-induced alkyl transfer between zinc or magnesium dialkyls and 1,4-diaza-1,3-butadiene substratesMartin Kaupp, Hermann Stoll, Heinzwerner Preuss, Wolfgang Kaim, Thomas Stahl, Ge…
It is shown that UV-excited porous Si (PS) exhibits an efficient visible photoluminescence (PL) at room temperature. The PS layers were formed by anodization of p-type and n-type single-crystal Si wafers in aqueous HF solutions. The peak wavelength of PL spectra depends on the anodization parameters including the resi…
For 45 years, the Bulgarian uranium industry operated behind an impenetrable veil of secrecy. As this veil is slowly lifted, the breadth and structure of the industry are becoming apparent-and so are the problems. Bulgaria`s uranium industry began in 1945 with the evaluation of several uranium mineral occurrences in t…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTControlled cooling crystallization of ammonium sulfate in the ternary system ammonium sulfate-ammonium nitrate-waterCheong Song Choi and Ik Soo KimCite this: Ind. Eng. Chem. Res. 1991, 30, 7, 1588–1593Publication Date (Print):July 1, 1991Publication History Published online1…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHydrolysis of poly(dichlorophosphazene)Douglas G. Gabler and James F. HawCite this: Macromolecules 1991, 24, 14, 4218–4220Publication Date (Print):July 1, 1991Publication History Published online1 May 2002Published inissue 1 July 1991https://pubs.acs.org/doi/10.1021/ma00014a…
Abstract The effects of phase separation temperature and time on the tensile, dynamic mechanical, and tear properties of blends of polystyrene and poly(vinyl methyl ether) were investigated after phase separation above their respective cloud points with specified temperature‐annealing time protocols. The results are a…
We conducted an analysis of leukemia mortality and protracted exposure to low-dose ionizing radiation. We used data from seven published epidemiologic studies of nuclear workers that reported individual monitoring information for radiation exposure. We found 83 leukemia deaths among white males from a combined total o…
The BN solubilities for B 2 O 3 , B 2 O 3 ─SiO 2 , and B 2 O 3 ─CaO systems have been measured mainly at 1823 K using a graphite crucible. The capability of the systems for nitrogen dissolution is compared with that of silicate systems in terms of nitride capacity. The dependence of nitrogen solubility in molten CaO c…
A new analysis is presented to describe the weak linear temperature dependence of the stress observed from 293 to 550 K in B-doped silicon membranes supported by silicon substrates. In contrast to a previous treatment, where consideration was given only to the existence of a differential thermal expansion coefficient…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTProcedure for predicting lower critical solution temperature behavior in binary blends of polymersP. A. Rodgers, D. R. Paul, and J. W. BarlowCite this: Macromolecules 1991, 24, 14, 4101–4109Publication Date (Print):July 1, 1991Publication History Published online1 May 2002Pu…
The divertor of a near-term fusion device has to withstand high heat fluxes, heat shocks, and erosion caused by the plasma. Furthermore, it has to be maintainable through remote techniques. Above all, a good heat removal capability across the interface (low-Z armor/heat sink) plus overall integrity after many operatio…
E. coli K12 with multicopy plasmid (lambda PR-promoter and temperature-sensitive lambda cI 857 repressor) was cultivated in 60-l bubble column and airlift tower loop reactors. The medium composition, cell concentration, and intracellulary enzyme activity were monitored on-line during batch, fed-batch, and continuous c…
We have studied the electronic structure of a metallic antiferromagnet ${\mathrm{V}}_{5}$${\mathrm{S}}_{8}$ above the N\'eel temperature by photoemission spectroscopy. The V 3s core-level peak shows a splitting dominated by the exchange splitting resulting from the high-spin ${\mathit{d}}^{2}$(${\mathrm{V}}^{3+}$) con…
The effectiveness of a grain bridging mechanism in the following wake zone of two MgAl 2 O 4 spinel microstructures has been demonstrated through renotching experiments with double‐cantilevered‐beam (DCB) specimens. Measurements of d K R /dδ a agree with previous crack growth resistance curves of similar materials, ob…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotoinduced dilatational motion in monolayers of poly(methyl methacrylate) having benzospiropyran side groupsI. Panaiotov, S. Taneva, A. Bois, and F. RondelezCite this: Macromolecules 1991, 24, 15, 4250–4254Publication Date (Print):July 1, 1991Publication History Published…
The genus Viridiella gen. nov. with a single species Viridiella fridericiana sp. nov. (Chlorococcales, Chlorophyta) is proposed. Cells are ellipsoidal to globose, and have a smooth cell wall and a single parietal chloroplast without pyrenoids. Reproduction occurs by the formation of 4–8 autospores. Viridiella can be d…
Abstract Quantity‐intensity (Q/I) curves and derived parameters provide general information about soil K availability. This investigation was conducted to study the relationship between the K Q/I parameters and the properties of 24 calcareous Inceptisols and Vertisols of southwestern Spain. Three Q/I parameters were c…
The mechanism of heat transfer through closed cell foam isulation can include conduction through gas in the cell interiors, conduction through the solid polymers, and thermal radiation. Each of these mechanisms is described. The rate of aging of foam insulation is related to the diffusion of air and blowing agents int…