Collagen cross-linking compounds in human urine
We report the isolation and chemical characterization of collagen cross-linking compounds, 3-hydroxypyridinium and dihydroxylysinonorleucine, from human urine.
Materials Literature
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Surface studies on multicomponent polymer systems by x-ray photoelectron spectroscopy: polystyrene/poly(ethylene oxide) homopolymer blends
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSurface studies on multicomponent polymer systems by x-ray photoelectron spectroscopy: polystyrene/poly(ethylene oxide) homopolymer blendsH. Ronald Thomas and James J. O'MalleyCite this: Macromolecules 1981, 14, 5, 1316–1320Publication Date (Print):September 1, 1981Publicati…
Living polymerization of epoxide catalyzed by the porphyrin-chlorodiethylaluminum system. Structure of the living end
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLiving polymerization of epoxide catalyzed by the porphyrin-chlorodiethylaluminum system. Structure of the living endTakuzo Aida and Shohei InoueCite this: Macromolecules 1981, 14, 5, 1166–1169Publication Date (Print):September 1, 1981Publication History Published online1 Ma…
Radiation grafting of acrylic acid onto fluorine‐containing polymers. I. Kinetic study of preirradiation grafting onto poly(tetrafluoroethylene)
Abstract Preirradiation grafting of acrylic acid onto poly(tetrafluoroethylene) film was studied. The trapped radicals formed upon irradiation are able to induce graft polymerization under appropriate conditions. The influence of the grafting conditions were analyzed kinetically. The grafting reaction begins close to…
Formation of surface states on the (111) surface of diamond
Experimental studies of the diamond (111) surface are presented. While no intrinsic surface states have been found on the 1×1 surface, our new results in ultraviolet photoemission spectroscopy (15 eV?hν?25 eV) show evidence of a band of surface states on the 2×2/2×1 reconstructed surface. The band of surface states (w…
Correlation of GaAs surface chemistry and interface Fermi-level position: A single defect model interpretation
XPS measurements of core-level binding energies have been used to determine the interface Fermi-level position in (100) and (110) n-and p-type GaAs samples as a function of surface treatment. A variation in interface Fermi-level position of up to 0.7 eV has been observed. The difference in interface Fermi-level positi…
An analysis of crystallization by homogeneous nucleation in a 4000-atom soft-sphere model
A molecular dynamics simulation of crystallization by the process of spontaneous homogeneous nucleation for a model of 4000 soft spheres with periodic boundary conditions is reported. When the amorphous system in the metastable state, at a point for which classical homogeneous nucleation theory predicts a vanishing of…
On the electronic structure of clean, 2×1 reconstructed silicon (001) surfaces
Surface photovoltage spectroscopy with clean 2×1 reconstructed Si(001) surfaces revealed indirect transitions from the bulk valence band into a band of empty surface states at (0.59 ± 0.04) eV above it. Chemisorption of atomic hydrogen is known to finally produce a Si(001)− 1×1:H structure and was found to remove thes…
Manifold effects of sodium butyrate on nuclear function. Selective and reversible inhibition of phosphorylation of histones H1 and H2A and impaired methylation of lysine and arginine residues in nuclear protein fractions.
In addition to its known effect in suppressing the deacetylation of the nucleosomal core histones, sodium butyrate in the concentration range 0.5 to 15 mM causes a selective inhibition of [32P]phosphate incorporation into histones H1 and H2A of cultured HeLa S3 cells. No commensurate general inhibition of phosphorylat…
Classification and Genesis of Spodosols in the Central Appalachians
Abstract Seventeen well‐drained pedons were sampled in Pennsylvania and northern West Virginia. Sixteen of the pedons had well‐expressed Spodosol morphology while one had very marginal Spodosol morphology. These pedons were classified according to Soil Taxonomy and the Canadian soil classification system. The degree o…
Investigation of solutions and gels of poly(4-methyl-1-pentene) in cyclohexane and decalin by viscosimetry, calorimetry, and x-ray diffraction. A new crystalline form of poly(4-methyl-1-pentane) from gels
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInvestigation of solutions and gels of poly(4-methyl-1-pentene) in cyclohexane and decalin by viscosimetry, calorimetry, and x-ray diffraction. A new crystalline form of poly(4-methyl-1-pentane) from gelsShaul M. Aharoni, Gerard Charlet, and Genevieve DelmasCite this: Macrom…
Flame retardant viscose rayon containing a pyrophosphate
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFlame retardant viscose rayon containing a pyrophosphateRainer WolfCite this: Ind. Eng. Chem. Prod. Res. Dev. 1981, 20, 3, 413–420Publication Date (Print):September 1, 1981Publication History Published online1 May 2002Published inissue 1 September 1981https://pubs.acs.org/do…
Calcium Thionyl Chloride High‐Rate Reserve Cell
Abstract not Available.
Crystalline morphology of isothermally crystallized branched polyethylene
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystalline morphology of isothermally crystallized branched polyethyleneM. Glotin and L. MandelkernCite this: Macromolecules 1981, 14, 5, 1394–1404Publication Date (Print):September 1, 1981Publication History Published online1 May 2002Published inissue 1 September 1981https…
Estimation of the χ parameter for poly(dimethylsiloxane) solutions by the UNIFAC group contribution method
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEstimation of the χ parameter for poly(dimethylsiloxane) solutions by the UNIFAC group contribution methodMoshe GottliebMoshe GottliebMore by Moshe Gottlieb and Mordechay HerskowitzMordechay HerskowitzMore by Mordechay HerskowitzCite this: Macromolecules 1981, 14, 5, 1468–14…
Optical activity induced in terbium(III) tris(pyridine-2,6-dicarboxylate) through association with certain chiral amino acids
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOptical activity induced in terbium(III) tris(pyridine-2,6-dicarboxylate) through association with certain chiral amino acidsHarry G. BrittainCite this: Inorg. Chem. 1981, 20, 9, 3007–3013Publication Date (Print):September 1, 1981Publication History Published online1 May 200…
An a b i n i t i o study of the conformational energetics of N-benzylideneaniline
A b initio calculations employing both minimal (STO–4G) and split valence (4–31G) basis sets have been used to study the conformational energy surface of N-benzylideneaniline (NBA). The former indicate that the minimum energy conformation of NBA corresponds to a rotation about the N–phenyl bond of ≊ 45° and a rotation…
Electronic Structure Theory
This paper reviews the history of IBM contributions over the last quarter century to electronic structure theory. The two main sections of the paper deal with large-scale computations in quantum chemistry and the study of the electronic structure of solids. The paper briefly discusses the methods of ab initio quantum…
Volume dependence of the elastic equation of state. 2. Solution-cured poly(dimethylsiloxane)
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTVolume dependence of the elastic equation of state. 2. Solution-cured poly(dimethylsiloxane)R. W. Brotzman and B. E. EichingerCite this: Macromolecules 1981, 14, 5, 1445–1448Publication Date (Print):September 1, 1981Publication History Published online1 May 2002Published ini…
Weathering of glauconites: reversal of the glauconitization process in a soil profile in western France
Abstract Polarizing microscope, electron microprobe and X-ray diffraction examination of minerals in a soil profile developed on a glauconite sand indicate that destabilization of glauconite can be a progressive process which appears to be the reverse of glauconitization. Glauconite in these soils appears to be destab…