منابع مشابه
Gamma-hydroxybutyrate / Butyric Acid
Gamma-hydroxybutyrate / butyric acid, ambiguously called GHB, presents some unique challenges for analysis due in part to its acidity, high polarity, and high solubility in aqueous solution. Its chemistry is complicated by its conversion into the corresponding lactone compound, where the GHB molecule condenses to form a cyclic ester with a five-membered ring. This compound, gamma-butyrolactone ...
متن کاملAnalysis of the key enzymes of butyric and acetic acid fermentation in biogas reactors
This study aimed at the investigation of the mechanisms of acidogenesis, which is a key process during anaerobic digestion. To expose possible bottlenecks, specific activities of the key enzymes of acidification, such as acetate kinase (Ack, 0.23-0.99 U mg(-1) protein), butyrate kinase (Buk, < 0.03 U mg(-1) protein) and butyryl-CoA:acetate-CoA transferase (But, 3.24-7.64 U mg(-1) protein), were...
متن کاملButyric acid fermentation of sodium hydroxide pretreated rice straw with undefined mixed culture.
This study describes an alternative mixed culture fermentation technology to anaerobically convert lignocellulosic biomass into butyric acid, a valuable product with wide application, without supplementary cellulolytic enzymes. Rice straw was soaked in 1% NaOH solution to increase digestibility. Among the tested pretreatment conditions, soaking rice straw at 50°C for 72 h removed ~66% of the li...
متن کاملButyric acid fermentation from pretreated and hydrolysed wheat straw by an adapted Clostridium tyrobutyricum strain
Butyric acid is a valuable building-block for the production of chemicals and materials and nowadays it is produced exclusively from petroleum. The aim of this study was to develop a suitable and robust strain of Clostridium tyrobutyricum that produces butyric acid at a high yield and selectivity from lignocellulosic biomasses. Pretreated (by wet explosion) and enzymatically hydrolysed wheat st...
متن کاملModeling of Clostridium tyrobutyricum for Butyric Acid Selectivity in Continuous Fermentation
A mathematical model was developed to describe batch and continuous fermentation of glucose to organic acids with Clostridium tyrobutyricum. A modified Monod equation was used to describe cell growth, and a Luedeking-Piret equation was used to describe the production of butyric and acetic acids. Using the batch fermentation equations, models predicting butyric acid selectivity for continuous fe...
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ژورنال
عنوان ژورنال: Journal of the agricultural chemical society of Japan
سال: 1950
ISSN: 0002-1407,1883-6844
DOI: 10.1271/nogeikagaku1924.23.275