Results 261 to 270 of about 205,517 (284)

Human intestinal gas measurement systems: in vitro fermentation and gas capsules

Trends in Biotechnology, 2015
The biological and clinical significance of the human gut microbiome is currently attracting worldwide attention. While rRNA and DNA technologies led to a quantum leap in our understanding of the numbers and types of gut microorganisms, much less is known about these microorganisms' activity in situ and in real time.
Jian Zhen, Ou, C K, Yao, Asaf, Rotbart, Jane G, Muir, Peter R, Gibson, Kourosh, Kalantar-zadeh   +5 more
openaire   +2 more sources

Exploiting the potential of gas fermentation

Industrial Crops and Products, 2017
The use of gas fermentation for production of chemicals and fuels with lower environmental impact is a technology that is gaining increasing attention. Over 38 Gt of CO2 is annually being emitted from industrial processes, thereby contributing significantly to the concentration of greenhouse gases in the atmosphere.
Redl, Stephanie, Diender, Martijn, Jensen, Torbjørn Ølshøj, Machado de Sousa, Diana, Nielsen, Alex Toftgaard   +4 more
openaire   +3 more sources

Bioreactor design for synthesis gas fermentations

Fuel, 1991
Abstract Bacterial cultures have been isolated for the conversion of synthesis gas (CO, H2 and CO2) into ethanol or methane. These heterogeneous reactions require the transport of substrate through the gas phase, across the interface into the liquid phase, and to the solid micro-organisms. The reactions are generally mass transfer limited due to very
K.T. Klasson, M.D. Ackerson, E.C. Clausen, J.L. Gaddy   +3 more
openaire   +1 more source

Automatic gas meter for laboratory fermenters

Biotechnology Techniques, 1995
A versatile, cheap and automated system is designed for the measurement of small gas flows produced in laboratory-scale fermentation processes. An automatic sampling device for programmed times is linked to the flow meter. The displacement of a liquid by the gas being measured is the principle on which both the meter and the sampling device are based ...
M. Mac�as, M. P�rez, I. Caro, D. Cantero   +3 more
openaire   +1 more source

Fermentation of biomass‐generated producer gas to ethanol

Biotechnology and Bioengineering, 2004
AbstractThe development of low‐cost, sustainable, and renewable energy sources has been a major focus since the 1970s. Fuel‐grade ethanol is one energy source that has great potential for being generated from biomass. The demonstration of the fermentation of biomass‐generated producer gas to ethanol is the major focus of this article in addition to ...
Rohit P, Datar, Rustin M, Shenkman, Bruno G, Cateni, Raymond L, Huhnke, Randy S, Lewis   +4 more
openaire   +2 more sources

Gas chromatography as an aid in fermentation studies

Analytical Biochemistry, 1965
Abstract A gas chromatographic method for the determination of fermentation products has been developed. The method has been applied to a Clostridium butylicum fermentation. The method permits greater speed and simplicity of analysis than conventional methods.
R, Turner, M, Gilmour
openaire   +2 more sources

Gas-Forming Citrate-Fermentation by Lactococci

Dairy industry
In milk processing, effective microbiological control depends on the correct choice of lactic acid bacteria in the microflora of bacterial starters. However, polyspecific starter consortia of acid-forming and aroma-forming lactococci still have no distinct criteria.
Irina Kucherenko, Elena Kuraeva, Anna Duganova   +2 more
openaire   +1 more source

Microbiology of synthesis gas fermentation for biofuel production

Current Opinion in Biotechnology, 2007
A significant portion of biomass sources like straw and wood is poorly degradable and cannot be converted to biofuels by microorganisms. The gasification of this waste material to produce synthesis gas (or syngas) could offer a solution to this problem, as microorganisms that convert CO and H2) (the essential components of syngas) to multicarbon ...
Henstra, A.M., Sipma, J., Rinzema, A., Stams, A.J.M.   +3 more
openaire   +3 more sources

Membrane gas sensors for fermentation monitoring

Journal of Fermentation Technology, 1987
Abstract Results from studies of membrane gas sensors are presented to show their general applicability to fermentation monitoring of volatiles, such as alcohols, organic acids, and aldehydes under various process and reactor conditions. Mainly the silicone tubing methods is described, with examples from ethanolic fermentation.
openaire   +1 more source

Controlled gas environments in industrial fermentations

Enzyme and Microbial Technology, 1980
Abstract The gas environment is of major importance in controlling aerobic fermentation processes for the manufacture of microbial products. Oxygen and carbon dioxide levels in gas-liquid equilibria affect productivity and energy consumption in such processes and appear to be implicated in the regulation of microbial metabolism.
openaire   +1 more source