Results 191 to 200 of about 22,966 (206)
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International Journal of Biological Macromolecules, 2007
In the present contribution, the potential for use of the ultrafine electrospun fiber mats of poly(3-hydroxybutyrate) (PHB) and poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) as scaffolding materials for skin and nerve regeneration was evaluated in vitro using mouse fibroblasts (L929) and Schwann cells (RT4-D6P2T) as reference cell lines ...
Orawan, Suwantong +6 more
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In the present contribution, the potential for use of the ultrafine electrospun fiber mats of poly(3-hydroxybutyrate) (PHB) and poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) as scaffolding materials for skin and nerve regeneration was evaluated in vitro using mouse fibroblasts (L929) and Schwann cells (RT4-D6P2T) as reference cell lines ...
Orawan, Suwantong +6 more
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Heat capacity of poly(3-hydroxybutyrate)
The Journal of Chemical Thermodynamics, 2014The heat capacity of poly(3-hydroxybutyrate) (P3HB) has been measured using a quantum design Physical Property Measurement System (PPMS), differential scanning calorimetry (DSC), and temperaturemodulated differential scanning calorimetry (TMDSC) over the temperature range of (1.9 to 460) K.
A. Czerniecka +4 more
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Plasticization of bacterial poly(3-hydroxybutyrate)
Macromolecules, 1992The effect of increasing amounts of a plassticizer, di-n-butyl phtalate, on the glass transition of poly(3-hydroxybutyrate) was examined over the whole concentration range, from pure polymer to pure ...
Giuseppina Ceccorulli +2 more
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Poly(3-hydroxybutyrate) granules ofBacillus megaterium
Folia Microbiologica, 1994Cells ofBacillus megaterium contain 35–45% of poly(3-hydroxybutyrate) (PHB) at the beginning of the stationary phase. This amount is only slightly affected by the medium composition. The PHB granules are spherical with the mean diameter of 1.15 μm.
O. Kofroňová +2 more
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Vibrational Spectroscopy, 2010
Abstract This work presents a FT-Raman study (λ0 = 1064 nm) of naturally occurring polyester poly[(R)-3-hydroxybutyrate] (PHB) and its copolymer poly[(R)-3-hydroxybutyrate-co-(R)-3-hydroxyvalerate] (PHBV) with 5, 8 and 12 mol % of HV (hydroxyvalerate).
Celly M.S. Izumi, Marcia L.A. Temperini
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Abstract This work presents a FT-Raman study (λ0 = 1064 nm) of naturally occurring polyester poly[(R)-3-hydroxybutyrate] (PHB) and its copolymer poly[(R)-3-hydroxybutyrate-co-(R)-3-hydroxyvalerate] (PHBV) with 5, 8 and 12 mol % of HV (hydroxyvalerate).
Celly M.S. Izumi, Marcia L.A. Temperini
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Biodegradable poly‐3‐hydroxybutyrate as a fertiliser carrier
Journal of the Science of Food and Agriculture, 2016AbstractBACKGROUNDIncreasing use of mineral fertilisers can lead to accumulation of fertilisers in soil, water and foodstuffs. One of the approaches to preventing these problems is to develop controlled release forms of fertilisers.RESULTSExperimental formulations of the nitrogen fertiliser urea loaded in a degradable matrix of the natural polymer poly‐
Tatiana G, Volova +2 more
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Polymer Degradation and Stability, 1994
Poly(3-hydroxybutyrate) {P(3HB)} and the copolymer poly(3-hydroxybutyrate-co-3-hydroxyvalerate) {P(3HB-co-3HV)} were irradiated with γ-rays at 25°C in air and in vacuum. Melting points (Tm) and glass-transition temperatures (Tg) were measured by differential scanning calorimetry.
Hiroshi Mitomo +3 more
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Poly(3-hydroxybutyrate) {P(3HB)} and the copolymer poly(3-hydroxybutyrate-co-3-hydroxyvalerate) {P(3HB-co-3HV)} were irradiated with γ-rays at 25°C in air and in vacuum. Melting points (Tm) and glass-transition temperatures (Tg) were measured by differential scanning calorimetry.
Hiroshi Mitomo +3 more
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World Journal of Microbiology and Biotechnology, 2005
Production of poly(3-hydroxybutyric acid) [P(3HB)] by Rhodopseudomonas palustris SP5212 isolated in this laboratory has been optimized under phototrophic microaerophilic conditions. Cells grown in malate medium accumulated 7.7% (w/w) P(3HB) of cellular dry weight at the early stationary phase of growth. The accumulated P(3HB) however, attained 15% (w/w)
Mahuya Mukhopadhyay +2 more
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Production of poly(3-hydroxybutyric acid) [P(3HB)] by Rhodopseudomonas palustris SP5212 isolated in this laboratory has been optimized under phototrophic microaerophilic conditions. Cells grown in malate medium accumulated 7.7% (w/w) P(3HB) of cellular dry weight at the early stationary phase of growth. The accumulated P(3HB) however, attained 15% (w/w)
Mahuya Mukhopadhyay +2 more
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Poly(3-Hydroxybutyrate) from Carbon Monoxide
2011Abstract The potential applications of naturally occurring poly(3-hydroxybutyrate) (PHB) is demonstrated by a summary of its variable mechanical properties in comparison with different commercially available polymers. This comparison underlines the striking similarity to the most-produced materials in the world, the poly(olefin)s, which offers many ...
Robert Reichardt, Bernhard Rieger
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Production of poly(3-hydroxybutyrate) from inexpensive substrates
Enzyme and Microbial Technology, 2000Two inexpensive substrates, starch and whey were used to produce poly(3-hydroxybutyrate) (PHB) in fed-batch cultures of Azotobacter chroococcum and recombinant Escherichia coli, respectively. Oxygen limitation increased PHB contents in both fermentations. In fed-batch culture of A. chroococcum, cell concentration of 54 g l(-1) with 46% PHB was obtained
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