9 documents found, page 1 of 1

Comparative proteomics of Geobacter sulfurreducens PCAT in response to acetate,...

Geobacter sulfurreducens is a model bacterium to study the degradation of organic compounds coupled to the reduction of Fe(III). The response of G. sulfurreducens to the electron donors acetate, formate, hydrogen and a mixture of all three with Fe(III) citrate as electron acceptor was studied using comparative physiological and proteomic approaches. Variations in the supplied electron donors resulted in differe...

Bacterial glycerol oxidation coupled to sulfate reduction at neutral and acidic pH

Glycerol is a main co-product of biodiesel production. Crude glycerol may serve as a cheap and attractive substrate in biotechnological applications, e.g. for the production of valuable chemicals or as an electron donor for reduction processes. In this work, sulfate reduction with glycerol was studied at neutral and acidic pH using bioreactor sludge samples and Tinto River sediments as a source of inoculum, res...

The deep-subsurface sulfate reducer Desulfotomaculum kuznetsovii employs two me...

Methanol is generally metabolized through a pathway initiated by a cobalamine-containing methanol methyltransferase by anaerobic methylotrophs (such as methanogens and acetogens), or through oxidation to formaldehyde using a methanol dehydrogenase by aerobes. Methanol is an important substrate in deep-subsurface environments, where thermophilic sulfate-reducing bacteria of the genus Desulfotomaculum have key ro...

Organic acid production from potato starch waste fermentation by rumen microbia...

Background: Exploring different microbial sources for biotechnological production of organic acids is important. Dutch and Thai cow rumen samples were used as inocula to produce organic acid from starch waste in anaerobic reactors. Organic acid production profiles were determined and microbial communities were compared using 16S ribosomal ribonucleic acid gene amplicon pyrosequencing. Results In both reactors, ...

Organic acid production from starchy waste by rumen derived microbial communities

Converting organic waste to energy carriers and valuable products such as organic acids (OA) using microbial fermentation is one of the sustainable options of renewable energy. Substrate and inoculum are important factors in optimizing the fermentation. In this study, we investigated organic acid production and microbial composition shift during the fermentation of starchy (potato) waste using two different sou...

Description of Trichococcus ilyis sp. nov. by combined physiological and in sil...

Species of the genus Trichococcus share high similarity of their 16S rRNA gene sequences (>99%). Digital DNADNA hybridization values (dDDH) among type strains of all described species of the genus Trichococcus ( T. flocculiformis DSM 2094T , T. pasteurii DSM 2381T , T. collinsii DSM 14526T , T. palustris DSM 9172T, and T. patagoniensis DSM 18806T) indicated that Trichococcus sp. strain R210T represents a novel ...

Prospecting fat-degrading anaerobes for biotechnology

Moorella stamsii sp. nov., a new anaerobic thermophilic hydrogenogenic carboxyd...

A novel anaerobic, thermophilic, carbon monoxide-utilizing bacterium, strain E3-O, was isolated from anaerobic sludge of a municipal solid waste digester. Cells were straight rods, 0.6 to 1μm in diameter and 2 to 3 μm in length, growing as single cells or in pairs. Cells formed round terminal endospores. The temperature range for growth was 50 to 70°C, with an optimum at 65°C. The pH range for growth was 5.7 to...

1,3-Propanediol production from glycerol by a newly isolated Trichococcus strain

A coccal bacterium (strain ES5) was isolated from methanogenic bioreactor sludge with glycerol as the sole energy and carbon source. Strain ES5 fermented glycerol to 1,3-propanediol as main product, and lactate, acetate and formate as minor products. The strain was phylogenetically closely related to Trichococcus flocculiformis; the rRNA gene sequence similarity was 99%. However, strain ES5 does not show the ty...