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| SILVA NETO, R. M. da; MAIA, C. W. C. P.; ROSA, M. de F.. |
| A celulose é uma das principais moléculas naturais utilizadas e tem sido tradicionalmente usada para fabricação de papel, além de outras aplicações. Algumas bactérias, em especial as do gênero Komagataeibacter, são capazes de produzir um biopolímero com estrutura química similar à celulose vegetal, denominado celulose bacteriana (CB). Dessa forma, podem, em determinadas aplicações, ser uma fonte alternativa à celulose vegetal, a qual é mundialmente utilizada pelas indústrias de um modo geral. A celulose vegetal e a CB apresentam a mesma estrutura molecular, mas a segunda tem vantagens competitivas, incluindo uma estrutura em rede naturalmente nanométrica, que atraíram atenção para sua produção. Em comparação com a celulose vegetal, a CB apresenta... |
| Tipo: Documentos (INFOTECA-E) |
Palavras-chave: Celulose bacteriana; Nanopartículas; Melaço de soja; Soy molasses; Bacterial cellulose; Nanoparticles. |
| Ano: 2021 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1130078 |
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| Vidotto,Francielle Lina; Ribeiro,Geovana Piveta; Tischer,Cesar Augusto. |
| ABSTRACT Because of the widespread occurrence of cellulose in nature, many organisms use glycerol as a source of carbon and energy, so these organisms have drawn attention to the potential use of glycerol bioconversion. The bacteria Gluconacetobacter xylinus, a strictly aerobic strain that performing incomplete oxidation of various sugars and alcohols to cellulose biosynthesis. For this reason, we modify the Hestrim-Schram medium, associating glycerol, glucose and sucrose varying their concentration. The fermentations were performed statically at a temperature of 28˚C for a period of 10 days. The pH, membrane formation, crystallinity and the production of some metabolites of the 4th, 7th and 10th days was evaluated. The results showed a higher yield of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bacterial cellulose; Glycerol; Metabolites; Gluconacetobacter xylinus; Solid state nuclear magnetic resonance; 1H nuclear magnetic ressonance. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132018000100404 |
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| Almeida,Denise Milleo; Prestes,Rosilene Aparecida; Fonseca,Adriel Ferreira da; Woiciechowski,Adenise L.; Wosiacki,Gilvan. |
| The objective of this work is to verifying the consume of the minerals K, Na, Fe, Mg, P, S-SO4-2,B,N Total Kjedahl (NTK), NO3--N, and NH4+-N in the production of bacterial cellulose by Acetobacter xylinum, according to the medium and the manner of cultivation. The fermentative process was in ripe and green coconut water. K and Na were determined by flame emission photometry, Mg and Fe by atomic absorption spectrophotometry, P by molecular absorption spectrophotometry, S-SO4-2 by barium sulphate turbidimetry, B by Azomethin-H method, NTK by Kjeldahl method, N-NO3-and N-NH4+ by vapor distillation with magnesium oxide and Devarda's alloy, respectively. In Fermentation of ripe coconut water there were higher consumption of K (69%), Fe (84,3%), P (97,4%),... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Minerals; Bacterial cellulose; Acetobacter xylinum. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822013000100030 |
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