Oxygen transfer rate modulates the dextransucrase production by Acetobacter tropicalis
نویسندگان
چکیده
منابع مشابه
Oxygen transfer rate during the production of alginate by Azotobacter vinelandii under oxygen-limited and non oxygen-limited conditions
BACKGROUND The oxygen transfer rate (OTR) and dissolved oxygen tension (DOT) play an important role in determining alginate production and its composition; however, no systematic study has been reported about the independent influence of the OTR and DOT. In this paper, we report a study about alginate production and the evolution of the molecular mass of the polymer produced by a wild-type A. v...
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Acetobacter tropicalis NBRC16470 can produce highly enantiomerically pure D-glyceric acid (D-GA; >99 % enantiomeric excess) from glycerol. To investigate whether membrane-bound alcohol dehydrogenase (mADH) is involved in GA production in A. tropicalis, we amplified part of the gene encoding mADH subunit I (adhA) using polymerase chain reaction and constructed an adhA-disrupted mutant of A. trop...
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Following cultivation-dependent and -independent techniques, we investigated the microbiota associated with Bactrocera oleae, one of the major agricultural pests in olive-producing countries. Bacterial 16S rRNA gene libraries and ultrastructural analyses revealed the presence of several bacterial taxa associated with this insect, among which Acetobacter tropicalis was predominant. The recent in...
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NADPH regeneration is a limiting factor in reduction of xylose to xylitol in C. tropicalis. The oxidative PPP is the major source of NADPH biosynthesis in yeast. To enhance metabolic flux through PPP for promotion of NADPH regeneration. Genes involoved in EMP pathway were engineered by sequencial disruption and over-expression. For this, several genes involves in EMP pathway and promoters were ...
متن کاملEffects of nanobubble aeration in oxygen transfer efficiency and sludge production in wastewater biological treatment
Low efficiency of conventional aeration techniques and the excessive production and disposal of sludge are great concerns in biological wastewater treatment systems. The present study aimed to evaluate the active sludge method using batch reactors under continuous operation to determine the efficiency of aeration and sludge production through microbubble and nanobubble aeration. The results ind...
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ژورنال
عنوان ژورنال: Journal of Biochemical & Microbial Technology
سال: 2013
ISSN: 2053-2482
DOI: 10.14312/2053-2482.2013-1