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Production and characterization of poly-3-hydroxybutyrate from crude glycerol by Bacillus sphaericus NII 0838 and improving its thermal properties by blending with other polymers BABT
Sindhu,Raveendran; Ammu,Balakrishnan; Binod,Parameswaran; Deepthi,Sreelatha K.; Ramachandran,K. B.; Soccol,Carlos Ricardo; Pandey,Ashok.
The aim of this work was to study the production of poly-3-hydroxybutyrate (PHB) under nitrogen limited conditions by Bacillus sphaericus NII 0838 using crude glycerol from biodiesel industry as sole carbon source. Effect of various process parameters on PHB production such as glycerol concentration, inoculum size and pH of the medium were optimized. Characterization of extracted PHB was carried out by FT-IR, ¹H and 13C NMR. Results showed that the bacterial culture accumulated about 31% PHB in crude glycerol medium. The extracted PHB was blended with other polymers to improve its physical characteristics. The thermal properties of the polymer like melting temperature (Tm) and heat of fusion (ΔHf) were determined using DSC.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Polyhydroxybutyrate; Bacillus sphaericus; Polymer blends; Crude glycerol; Biodiesel industry.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000400019
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Polymers as carriers for rhizobial inoculant formulations PAB
Fernandes Júnior,Paulo Ivan; Rohr,Tiago Gusmão; Oliveira,Paulo Jansen de; Xavier,Gustavo Ribeiro; Rumjanek,Norma Gouvêa.
The aim of this work was to evaluate the efficiency of carboxymethyl cellulose (CMC) and starch blends as carrier materials of rhizobial inoculants regarding their capacity to maintain viable cells and promote cowpea (Vigna unguiculata) nodulation. The experimental design adopted was completely randomized, with three replicates. Forty different compositions of carboxymethyl cellulose (CMC) with starch, compatibilized or not with different proportions of MgO or ZnO, were evaluated regarding their ability of maintaining rhizobial viable cells during the storage period of one month at room temperature, in an initial screening. Thereafter, selected inoculant carrier blends were evaluated regarding their ability to maintain viable rhizobial cells for a period...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bradyrhizobium japonicum; Vigna unguiculata; Biological nitrogen fixation; Carboxymethyl cellulose; Inoculant technology; Polymer blends.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009000900017
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