Factors Influencing the Production of Volatile Fatty Acids from Hemicellulose, Pectin and Starch by Mixed Culture of Rumen Microorganisms

Biosynthesis of tryptophan by rumen microorganisms was investigated using the continuous-flow artificial rumen apparatus, L-Serine-14C (U) was incubated with rumen microorganisms. Most of the serine was rapidly metabolized to volatile fatty acids. The synthesis of tryptophan was indicated by detection of label in the tryptophan area of the thin-layer chromatograms following column chromatography of saline and rumen liquor. Although labelled serine was utilized in synthesis of tryptophan, the proportion of tryptophan containing label was about 0.0001%.

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Factors Influencing the Concentration of Volatile Fatty Acids, Ammonia, and Other Nutrients in Stored Liquid Pig Manure

Journal of Environmental Quality ◽

10.2134/jeq2006.0222 ◽

2007 ◽

Vol 36 (2) ◽

pp. 440-447 ◽

Cited By ~ 36

Author(s):

Kenneth L. Conn ◽

Edward Topp ◽

George Lazarovits

Keyword(s):

Fatty Acids ◽

Volatile Fatty Acids ◽

Pig Manure ◽

Factors Influencing

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Factors influencing the persistence ofEscherichia coliO157:H7 lineages in feces from cattle fed grain versus grass hay diets

Canadian Journal of Microbiology ◽

10.1139/w10-051 ◽

2010 ◽

Vol 56 (8) ◽

pp. 667-675 ◽

Cited By ~ 11

Author(s):

Ross M.S. Lowe ◽

Krysty Munns ◽

L. Brent Selinger ◽

Linda Kremenik ◽

Danica Baines ◽

...

Keyword(s):

Escherichia Coli ◽

Fatty Acids ◽

Volatile Fatty Acids ◽

Hemorrhagic Colitis ◽

Escherichia Coli O157 ◽

Negative Bacterium ◽

Gram Negative ◽

E Coli ◽

Factors Influencing ◽

Uremic Syndrome

Escherichia coli O157:H7 is a pathogenic, gram-negative bacterium that causes diarrhea, hemorrhagic colitis, and can lead to fatal hemolytic uremic syndrome in humans. We examined the persistence of E. coli O157:H7 lineages I and II in feces held at 4, 12, and 25 °C, from animals fed either grain or hay diets. Three strains of each lineage I and II were inoculated into grain-fed or hay-fed feces, and their persistence was monitored over 28 days. No significant differences in E. coli O157:H7 survival between the 2 lineages in both fecal types was found at the examined temperatures. Volatile fatty acids were higher in grain-fed than in hay-fed feces, resulting in consistently lower pH in the grain-fed feces at 4, 12 and 25 °C. Regardless of lineage type, E. coli O157:H7 CFUs were significantly higher in grain-fed than in hay-fed feces at 4 and 25 °C. Escherichia coli O157:H7 survival was highest in grain-fed feces at 25 °C up to 14 days. Our results indicate that the 2 lineages of E. coli O157:H7 do not differ in their persistence; however, it appears that temperature and feces type both affect the survival of the pathogen.

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Economic process to produce biohydrogen and volatile fatty acids by a mixed culture using vinasse from sugarcane ethanol industry as nutrient source

Bioresource Technology ◽

10.1016/j.biortech.2014.02.042 ◽

2014 ◽

Vol 159 ◽

pp. 380-386 ◽

Cited By ~ 65

Author(s):

Eduardo Bittencourt Sydney ◽

Christian Larroche ◽

Alessandra Cristine Novak ◽

Regis Nouaille ◽

Saurabh Jyoti Sarma ◽

...

Keyword(s):

Fatty Acids ◽

Mixed Culture ◽

Volatile Fatty Acids ◽

Nutrient Source ◽

Economic Process

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Trans-Aconitate Utilization by Sheep

Australian Journal of Biological Sciences ◽

10.1071/bi9680529 ◽

1968 ◽

Vol 21 (3) ◽

pp. 529 ◽

Cited By ~ 14

Author(s):

GS Kennady

Keyword(s):

Fatty Acids ◽

Volatile Fatty Acids ◽

Dry Weight ◽

Weight Basis ◽

Rumen Microorganisms ◽

Calcium And Magnesium ◽

Urinary Citrate ◽

Cis And Trans

Sheep fed diets containing 3�5 and 7� 0% trans�aconitate on a dry weight basis for 5 days appeared normal and maintained normal levels of blood citrate, ketones, and aconitate, but showed large increases in urinary citrate. Calcium and magnesium levels in plasma and urine were not substantially modified. When trans-aconitate was placed in the rumen it disappeared rapidly but did not increase the concentration of rumen volatile fatty acids; blood and urinary aconitate values remained low. trans-Aconitate did not inhibit the fermentation of soluble substrates by rumen microorganisms in vitro. Both cis- and trans-aconitate were fermented slowly.

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