Materials Literature
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4-Hydroxybutyryl-CoA dehydratase, the key enzyme in the metabolism of gamma-aminobutyrate in Clostridium aminobutyricum, represents approximately 15-25% of the soluble protein. The enzyme was purified to homogeneity under anaerobic conditions to a specific activity of 209 nkat mg-1. The dehydratase catalyses the rever…
Changes induced in the electronic structure of ${\mathrm{BaTiO}}_{3}$ by substitutions of R=Y, La, or Nd for Ba to form the mixed oxides ${\mathit{R}}_{\mathit{x}}$${\mathrm{Ba}}_{1\mathrm{\ensuremath{-}}\mathit{x}}$${\mathrm{TiO}}_{3\mathrm{\ensuremath{-}}\mathrm{\ensuremath{\delta}}}$ have been investigated using ul…
Abstract L‐Lactide was polymerized in toluene with various alkoxide initiators. These initiators were prepared in situ from potassium t.‐butoxide and primary or secondary alcohols such as tetradecanol, diethylene glycol butyl ether, menthol or testosteron. All these alcohols were incorporated as ester endgroups into t…
The electronic hyperpolarisabilities of a chiral 4-alkoxystilbazole and its complexes with Rh(I) and Ir(I) are reported and discussed in terms of the acceptor properties of the metal fragment.
Several experiments were performed to elucidate the origin of the second-order optical nonlinearity χ(2) induced in the corona-poled Corning 7059 glass films. The values and the time decay of the second-harmonic coefficient d33 were measured for the glass films poled on several different kinds of substrates. The value…
OBJECTIVE: MR lymphography with interstitial injection of superparamagnetic iron oxide particles was optimized in normal rabbits by investigating the pattern of signal reduction in lymph nodes as a function of dose and time after administration. The optimized examination procedure was then used in a rabbit tumor model…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Tohru Okuzono, Kyozi Kawasaki, Tatsuzo Nagai; Rheology of random foams. J. Rheol. 1 July 1993; 37…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTime-resolved measurements of singlet oxygen dimol-sensitized luminescenceAlexander A. Krasnovsky Jr. and Christopher S. FooteCite this: J. Am. Chem. Soc. 1993, 115, 14, 6013–6016Publication Date (Print):July 1, 1993Publication History Published online1 May 2002Published ini…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTProduction of a polymer with highly anisotropic conductivity and structure by Co-electroprecipitation of an imide anion radical and polycationLarry L. Miller, Chuan Jiang Zhong, and Paul KasaiCite this: J. Am. Chem. Soc. 1993, 115, 14, 5982–5990Publication Date (Print):July…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOxygen chemisorption on titania-zirconia mixed oxide supported vanadium oxide catalystsB. Mahipal Reddy, B. Manohar, and E. Padmanabha ReddyCite this: Langmuir 1993, 9, 7, 1781–1785Publication Date (Print):July 1, 1993Publication History Published online1 May 2002Published i…
A new 1:1 mixed-stack organic charge-transfer crystal of 2,6-dimethyltetrathiafulvalene-p-chloranil (DMTTF-CA), which undergoes a temperature-induced neutral-ionic transition (TINIT), was reported. At a critical temperature of 65\ifmmode\pm\else\textpm\fi{}5 K the molecular ionicity and the stack dimerization were fou…
The photoluminescence (PL) and infrared stimulated luminescence (ISL) spectra of CaS:Eu,Sm infrared stimulable phosphors (ISPs) are studied. In addition, the concentration dependence of ISL intensity is examined. Sm 3+ - and Eu 2+ -related structures are found in both the PL excitation and emission spectra. Two types…
X-ray and electron beam damage studies were performed on Br-terminated and methyl-terminated alkylsilane self-assembled monolayers. X-ray beam initiated damage was primarily limited to removal of the labile Br group and did not significantly damage the hydrocarbon chain. Some of the x-ray beam damage could be attribut…
Thermal fusion or welding of collagen-rich tissues involves the thermal denaturation of collagen which is reflected by changes in birefringence intensity in histologic sections. The weld bond between two severed edges is formed when the apposed ends of the collagen fibrils unravel during heating then re-entwine during…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMultisite functionalized dendritic macromolecules prepared via metalation by superbases and reaction with electrophilesL. Lochmann, K. L. Wooley, P. T. Ivanova, and J. M. J. FrechetCite this: J. Am. Chem. Soc. 1993, 115, 15, 7043–7044Publication Date (Print):July 1, 1993Publ…
Si(111) wafers, cut at angles between 0° and 5° in the [112̄] direction, were prepared by a standard RCA cleaning process followed by a rinse in HF/NH4F solutions with different pH values. Si–SiO2 structures were formed on these surfaces by a two-step low-temperature plasma-assisted oxidation/deposition process, and c…
Abstract Blends of biodegradable polymers having properties distinct from the individual polymer components, and that are suitable for use as carriers of pharmaceutically active agents, were prepared from two or more polyanhydrides, polyesters, and mixtures of polyanhydrides and low molecular weight polyesters. The bl…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and molecular characterization of narrow molecular weight distribution fractions of methyl-substituted poly(aryl ether ether ketone)Fei Wang, Jacques Roovers, and Paul M. ToporowskiCite this: Macromolecules 1993, 26, 15, 3826–3832Publication Date (Print):July 1, 19…
A cell growth factor protein (insulin) and/or a cell-adhesion protein (fibronectin) were immobilized on surface-hydrolyzed poly(methyl methacrylate) membranes. The growth of mouse fibroblast cells STO was accelerated by the immobilized insulin. This acceleration was enhanced by introduction of spacer arms. Coimmobiliz…
Pulse labelling experiments and enzyme studies show that Thermoproteus tenax is able to degrade glucose via the Embden-Meyerhof-Parnas (EMP) pathway. T. tenax is the first archeum for which the glycolytic EMP pathway could be established. One of the key enzymes, 6-phosphofructokinase of T. tenax depends on (pyrophosph…