Materials Literature
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Beet molasses (BM) has proven to be an excellent feedstock for polyhydroxyalkanoate (PHA) production by Azotobacter vinelandii UWD. The substrate-cost for PHA production from BM in fed-batch culture was one-third of that using glucose. Copolymers containing β-hydroxyvalerate are readily formed in BM medium when valera…
Sixteen samples of standard insulating materials with electrodes were exposed to the full variety of the earth's space radiation belts on the CRRES (Combined Release and Radiation Effects Satellite) for 14 months. Spontaneous discharges were recorded for each sample and were compared to the radiation levels, which wer…
Abstract Neutron diffraction studies, especially with powders, play an important role in structural solid‐state chemistry, making possible the precise determination of the location of light atoms, particularly hydrogen, and enabling a distinction to be made between certain neighboring elements in the periodic table th…
The bacterial species Escherichia coli has proven to be a powerful tool in the molecular analysis of polyhydroxyalkanoate (PHA) biosynthesis. In addition, E. coli holds promise as a source for economical PHA production. Using this microorganism, clones have been developed in our laboratory which direct the synthesis o…
Spherical giant liposomes that had encapsulated skeletal-muscle G-actin were made by swelling a dried lipid mixture of dimyristoyl phosphatidylcholine/cardiolipin, 1:1 (wt/wt), in a solution of G-actin/CaCl2 at 0 degree C. Polymerization of the encapsulated G-actin into actin filaments was achieved by raising the temp…
In this paper I shall discuss some of the factors that are important in the large scale production by fermentation of poly-β-hydroxybutyrate: poly-β-hydroxyvalerate (PHB/HV) copolymers. Many of the points discussed are common process features in any scale up procedure.
Abstract Single‐components or multicomponent oxide thin films are of interest for electronic and opto‐electronic devices, optical applications, catalysis, corrosion protection etc. Their preparation by chemical routes is based on the hydrolytic (sol‐gel process) or pyrolytic (MOCVD) conversion of precursors. Derivativ…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMultiphase structure of a segmented polyurethane: effects of temperature and annealingYingjie Li, Tong Gao, Jian Liu, Kung Linliu, C. Richard Desper, and Benjamin ChuCite this: Macromolecules 1992, 25, 26, 7365–7372Publication Date (Print):December 1, 1992Publication History…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectronic effects of peripheral substituents in porphyrins: x-ray photoelectron spectroscopy and ab initio self-consistent field calculationsPaul G. Gassman, Abhik Ghosh, and Jan AlmlofCite this: J. Am. Chem. Soc. 1992, 114, 25, 9990–10000Publication Date (Print):December 1…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSurface chemistry of colloidal gold: deposition of lead and accompanying optical effectsPaul Mulvaney, Michael Giersig, and Arnim HengleinCite this: J. Phys. Chem. 1992, 96, 25, 10419–10424Publication Date (Print):December 1, 1992Publication History Published online1 May 200…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMagnetic properties of mixed-valence heteropoly blues. Interactions within complexes containing paramagnetic atoms in various sites as well as "blue" electrons delocalized over polytungstate frameworksNieves Casan-Pastor and Louis C. W. BakerCite this: J. Am. Chem. Soc. 1992…
Leptothrix discophora SP-6 was isolated from the outflow reservoir of an artificial iron seep. Its sheathforming phenotype was maintained by slow growth in a mineral salts-vitamin-pyruvate medium under minimal aeration at 20 to 25 degrees C. A sheathless variant, SP-6(sl), was isolated from smooth colonies that appear…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTUltrafast studies of photochromic spiropyrans in solutionJin Z. Zhang, Benjamin J. Schwartz, Jason C. King, and Charles B. HarrisCite this: J. Am. Chem. Soc. 1992, 114, 27, 10921–10927Publication Date (Print):December 1, 1992Publication History Published online1 May 2002Publ…
SUMMARY The clay fraction of soils from south‐western Australia is dominated by kaolinite. These soil kaolinites give broad basal reflections (median value for WHH 001 =0.41° 2θ) and have poorly ordered structures. The median value of the Hughes & Brown crystallinity index for 35 soil kaolinites is 5.4 compared to…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTProtein adsorption and inactivation on surfaces. Influence of heterogeneitiesAjit SadanaCite this: Chem. Rev. 1992, 92, 8, 1799–1818Publication Date (Print):December 1, 1992Publication History Published online1 May 2002Published inissue 1 December 1992https://pubs.acs.org/do…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMultibranching polymerization: palladium-catalyzed ring-opening polymerization of cyclic carbamate to produce hyperbranched dendritic polyamineMasato Suzuki, Atsuhiko Ii, and Takeo SaegusaCite this: Macromolecules 1992, 25, 25, 7071–7072Publication Date (Print):December 1, 1…
Motivated by the recent discovery of a novel biaxial and orthogonal smectic polymeric liquid crystal with in-plane fluid order (smectic CM), we diecues defects allowed by ita symmetry. Smectic CM has not yet been found in low molecular weight liquid crystals. We point out that the observation of defecta provides a use…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPerfluoropolyethers: intramolecular disproportionationPaul H. KasaiCite this: Macromolecules 1992, 25, 25, 6791–6799Publication Date (Print):December 1, 1992Publication History Published online1 May 2002Published inissue 1 December 1992https://pubs.acs.org/doi/10.1021/ma0005…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLuminescence properties of thin zinc oxide membranes prepared by the sol-gel technique: change in visible luminescence during firingShuji Sakohara, Lane D. Tickanen, and Marc A. AndersonCite this: J. Phys. Chem. 1992, 96, 26, 11086–11091Publication Date (Print):December 1, 1…
The properties of oligo(pyrrole)s can give vital clues to the intrinsic properties and behavior of poly(pyrrole), which is important in the field of polyconjugated conducting polymers but difficult to obtain defect‐free. However, up to now little work has been done on oligo(pyrrole)s, perhaps because of their sensitiv…