Results 181 to 190 of about 18,639,392 (237)
Enzyme and Microbial Technology, 2000 An efficient method for the preparation of optically active alkyl (R)-(-)-3-hydroxybutyrates by chemical depolymerization of biopolymer, poly-(R)-(-)-(3-hydroxybutyrate), was established. This method consists of simple recovery of poly-(R)-(-)-(3-hydroxybutyrate) from bacterial cells followed by acidic alcoholysis. When poly-(R)-(-)-(3-hydroxybutyrate)
Sang Yup Lee
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Biochimica Et Biophysica Acta - General Subjects, 1986
The extracellular poly(3-hydroxybutyrate) depolymerase purified from Alcaligenes faecalis T1 has two disulfide bonds, one of which appears to be necessary for the full enzyme activity. This depolymerase hydrolyzed not only hydrophobic poly(3-hydroxybutyrate) but also water-soluble trimer and larger oligomers of D-(-)-3-hydroxybutyrate, regardless of ...
Satoru Masamune +2 more
exaly +3 more sources
The extracellular poly(3-hydroxybutyrate) depolymerase purified from Alcaligenes faecalis T1 has two disulfide bonds, one of which appears to be necessary for the full enzyme activity. This depolymerase hydrolyzed not only hydrophobic poly(3-hydroxybutyrate) but also water-soluble trimer and larger oligomers of D-(-)-3-hydroxybutyrate, regardless of ...
Satoru Masamune +2 more
exaly +3 more sources
Biotechnology and Bioprocess Engineering, 2013 Nanocomposites have recently been identified as a useful scaffolding material in tissue engineering applications. Poly (3-hydroxybutyrate)/hydroxyapatite nanoparticles (P3HB)/(nHA) porous scaffolds were successfully fabricated through a solvent casting and particulate leaching technique.
Saadat, Abbas +5 more
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Poly(3-hydroxybutyrate) and poly(3-hydroxybutyrate)-based biopolymer systems
Biochemistry (Moscow) Supplement Series B: Biomedical Chemistry, 2011Biodegradable biopolymers attract much attention in biology and medicine due to its wide application. The present review considers a biodegradable and biocompatible polymer of bacterial origin, poly(3-hydroxybutyrate), which has wide perspectives in medicine and pharmaceutics.
A. P. Bonartsev +3 more
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Anaerobic degradation of poly-3-hydroxybutyrate and poly-3-hydroxybutyrate-co-3-hydroxyvalerate
Biodegradation, 1997The anaerobic degradation of the polyesters poly-3-hydroxybutyrate (PHB) and poly-3-hydroxybutyrate-co-3-hydroxyvalerate (PHBV) was investigated with special regard to intermediate products, kinetics, and yields. During the degradation of PHBV acetate, propionate, n-butyrate, and n-valerate were detected.
A, Reischwitz, E, Stoppok, K, Buchholz
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Journal of Applied Polymer Science, 2002
AbstractThe thermal decomposition mechanism of maleated poly(3‐hydroxybutyrate) (PHB) was investigated by FTIR and 1H NMR. The results of experiments showed that the random chain scission of maleated PHB obeyed the six‐membered ring ester decomposition process.
Cheng Chen +5 more
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AbstractThe thermal decomposition mechanism of maleated poly(3‐hydroxybutyrate) (PHB) was investigated by FTIR and 1H NMR. The results of experiments showed that the random chain scission of maleated PHB obeyed the six‐membered ring ester decomposition process.
Cheng Chen +5 more
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Biomacromolecules, 2005
Polyhydroxyalkanoates (PHAs) represent a group of biopolymers that are synthesized by many bacteria as storage compounds and deposited as insoluble cytoplasmic inclusions. Because they have many putative technical and medical applications, PHAs may play an important role in human life in the future.
Markus, Pötter, Alexander, Steinbüchel
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Polyhydroxyalkanoates (PHAs) represent a group of biopolymers that are synthesized by many bacteria as storage compounds and deposited as insoluble cytoplasmic inclusions. Because they have many putative technical and medical applications, PHAs may play an important role in human life in the future.
Markus, Pötter, Alexander, Steinbüchel
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European Polymer Journal, 2002
Nonisothermal crystallization and melting behavior of poly(3-hydroxybutyrate) (PHB) and maleated PHB were investigated by differential scanning calorimetry using various cooling rates. The results show that the crystallization behavior of maleated PHB from the melt greatly depends on cooling rates and its degree of grafting.
Cheng Chen +5 more
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Nonisothermal crystallization and melting behavior of poly(3-hydroxybutyrate) (PHB) and maleated PHB were investigated by differential scanning calorimetry using various cooling rates. The results show that the crystallization behavior of maleated PHB from the melt greatly depends on cooling rates and its degree of grafting.
Cheng Chen +5 more
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Photodegradation of poly(3-hydroxybutyrate)
Polymer Degradation and Stability, 2010Abstract The effect of ultraviolet radiation on the properties of poly(3-hydroxybutyrate) (PHB) was studied. The PHB investigated is produced from microbial fermentation using saccharose from sugarcane as the carbon source to the bacteria. The material was exposed to artificial UV-A radiation for 3, 6, 9 and 12 weeks.
Roberta K. Sadi +2 more
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Polymer Degradation and Stability, 1992
Abstract The compatibility and biodegradability of a blend of poly(3-hydroxybutyrate) (PHB) and poly(ethylene oxide) (PEO) were studied by analysis of differential scanning calorimetry and enzymatic degradation. The PHB/PEO blend exhibited a single glass-transition temperature (Tg) and the Tg values depended upon the blend composition, which ...
Y.Kumagai, Y.Doi
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Abstract The compatibility and biodegradability of a blend of poly(3-hydroxybutyrate) (PHB) and poly(ethylene oxide) (PEO) were studied by analysis of differential scanning calorimetry and enzymatic degradation. The PHB/PEO blend exhibited a single glass-transition temperature (Tg) and the Tg values depended upon the blend composition, which ...
Y.Kumagai, Y.Doi
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