Results 111 to 120 of about 20,093,212 (172)
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A chemical degradation of 3-hydroxybutyric acid
Analytical Biochemistry, 1978Abstract A method is described for degrading 3-hydroxybutyric acid to obtain specifically and in good yield each of its carbons as CO 2 . The hydroxybutyrate is dehydrated to crotonic acid which is reduced to butyric acid. The butyric acid is then degraded stepwise utilizing the Schmidt reaction.
W C, Schumann, K, Kumaran, B R, Landau
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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)
, Lee, , Park, , Lim, , Han, , Lee
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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)
, Lee, , Park, , Lim, , Han, , Lee
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Enzymatic esterification of 3-hydroxybutyric acid
Biotechnology Letters, 1993Candida cylindracea lipase catalysed esterification of (±)-3-hydroxybutyric acid (1) with n-butanol was studied in different solvents. This provided an alternative preparative method for the versatile chiron. butyl (S)-3-hydroxybutyrate (2) via kinetic resolution of (±)-1 With toluene as the reaction medium, the enantioselection was found to be ...
S. Chattopadhyay, V. R. Mamdapur
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Biotechnological production of (R)-3-hydroxybutyric acid monomer
Journal of Biotechnology, 2007The escalating problems regarding the treatment of plastic waste materials have led to development of biodegradable plastics. At present, a number of aliphatic polyesters; such as poly[(R)-3-hydroxybutyrate] (PHB), poly(l-lactide), polycaplolactone, poly(ethylene succinate) and poly(butylene succinate) have been developed.
Yutaka, Tokiwa, Charles U, Ugwu
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Omega oxidation of fatty acids and the pathway of 3-hydroxybutyric acid formation
Archives of Biochemistry and Biophysics, 1978Abstract Pathways followed by the carbons of long chain fatty acids in their conversion to 3-hydroxybutyric acid were traced and the contribution of ω-oxidation to fatty acid oxidation was determined in the cellular environment where ketone body formation occurs.
W C, Schumann +2 more
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Journal of Microencapsulation, 1995
Microcapsules of poly(3-hydroxybutyric acid) [PHB] and its copolymers with hydroxyvalerate [HV] were prepared by the solvent evaporation technique and loaded with a model drug, 2,7-dichlorofluorescein. Microcapsules were also prepared from the same polymers by incorporating a polyphosphate-Ca+2 complex into the membrane.
Vasif Hasirci, Ihsan Gürsel
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Microcapsules of poly(3-hydroxybutyric acid) [PHB] and its copolymers with hydroxyvalerate [HV] were prepared by the solvent evaporation technique and loaded with a model drug, 2,7-dichlorofluorescein. Microcapsules were also prepared from the same polymers by incorporating a polyphosphate-Ca+2 complex into the membrane.
Vasif Hasirci, Ihsan Gürsel
exaly +3 more sources
Accumulation of Poly (3-Hydroxybutyric Acid) by Some Soil Streptomyces
Current Microbiology, 1999In a limited-scale survey, 55 soil streptomycetes were screened for the accumulation of poly (3-hydroxybutyrate) [PHB]. Only 18% of the isolates accumulated PHB ranging between 1.9-7.8% of the dry biomass. The promising isolate DBCC-719, identified as Streptomyces griseorubiginosus, accumulated PHB amounting to 9.5% of the mycelial dry mass in the ...
A, Manna, R, Banerjee, A K, Paul
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Hypothalamic neuronal activity responses to 3-hydroxybutyric acid, an endogenous organic acid
Brain Research, 1990To elucidate the anorectic action of the endogenous organic acid, 3-hydroxybutyric acid (3-HBA), its effects on neurons in both the rat ventromedial hypothalamic nucleus (VMH) and the lateral hypothalamic area (LHA) were examined. Iontophoretic application of 3-HBA significantly facilitated the firing rate of VMH neurons, whereas facilitation and ...
T, Minami +3 more
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Characterization of Rheological Properties of poly (3-hydroxybutyric acid)
2005 Tampa, FL July 17-20, 2005, 2005To process poly (3-hydroxybutyric acid) (PHB) more efficiently, rheological properties of PHB at different temperatures are needed. There are several fundamentals tests available to characterize PHB such as shear stress as a function of shear rate, stress sweep, frequency sweep and dynamic rheological tests.
null Hee-Joon Park +2 more
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Acetic acid and 3-hydroxybutyric acid levels in cerebrospinal fluid of cattle
Animal Science Journal, 2002To evaluate the importance of acetic acid and 3-hydroxybutyric acid (3-HB) in cerebrospinal fluid (CSF) of cattle, CSF samples were taken from a population of 60 cattle including healthy and sick animals with central nervous disorders. Mean acetic acid and 3-HB levels in blood plasma were 0.30 (SD 0.24) and 0.30 (SD 0.28) mM, and those in CSF were 0.14
Hiroshi SATO +2 more
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