RESUMO
Rhizopus oryzae NBRC 5378 was the best among 56 strains of R. oryzae for the production of lactic acid from xylose. This strain produced lactic acid from wheat straw powder by a simultaneous saccharification and fermentation process, with a yield of 0.23 g/g from cellulose and hemicellulose in wheat straw.
Assuntos
Celulose/metabolismo , Ácido Láctico/biossíntese , Polissacarídeos/metabolismo , Rhizopus/metabolismo , Triticum/química , Xilose/metabolismo , Etanol/metabolismo , FermentaçãoRESUMO
New clerodane-type diterpenes, designated as parvitexins A (1)-E (5), were isolated from the in vitro-cultured liverwort, Scapania parvitexta. These compounds were determined to be monoacetylated clerodane-type diterpenes based on spectroscopic evidence.
Assuntos
Diterpenos Clerodânicos/química , Hepatófitas/química , Diterpenos Clerodânicos/isolamento & purificação , Estrutura Molecular , Análise EspectralRESUMO
The objectives of this study were to evaluate the fundamental properties of potato pulp and to explore its potential uses. Lactic acid bacteria were the dominant microbes in potato pulp over the season (maximum being 10(8)/g). The water content in potato pulp was approximately 80% in all season. Starch and fiber were the main components of potato pulp, amounting to 80% of the dried matter regardless of the season. The fermentation of potato pulp by Rhizopus oryzae progressed only in the potato pulp extracted at the end of the season. This indicated that the fermentation of potato pulp was influenced by the dates of extraction, and it was assumed that the quality of the components, such as pectin, varied with such dates.
Assuntos
Rhizopus/metabolismo , Solanum tuberosum/microbiologia , Fermentação , Solanum tuberosum/metabolismo , Fatores de TempoRESUMO
The biosynthesis of fukinolic acid, which had been isolated from the Japanese fuki vegetable, Petasites japonicus, was investigated by feeding selected (13)C-labeled compounds to axenic cultures of P. japonicus. [1,2-(13)C(2)] sodium acetate and [1-(13)C] L-tyrosine were incorporated into the fukiic acid sub group, while [3-(13)C] L-phenylalanine was incorporated into the caffeic acid moiety.
