Volatile fatty acids are the most important intermediates in anaerobic digestion, and their degradations are extremely complicated thermodynamically. In this research, syntrophic anaerobic digestion of volatile fatty acids using enriched acetogenic and methanogenic cultures in a batch reactor at mesophilic conditions was investigated. Interactive effects of key microbiological and operating var...

Abstract For in vitro digestibility experiments addressing both horses and cattle, feces have long been thought to be an equivalent surrogate for ruminal or cecal inoculum that would eliminate the need fistulated animals. However, this assumption requires similar microbial chemical properties among sources. Validation of relationship fecal metabolic allow more readily accessible information on ...

Molecular distillates of butter oil consisting of the four most volatile 2.5% cuts (obtained by a redistillation of the first 10% cut), the next most volatile 40% cut, and the 50% residue obtained from 777 pounds of oil were subjected to fractionation by adsorption and gas-liquid chromatography. Only the most volatile 2.5oj, cut, which contained 10% unsaponifiable matter, was examined in detail...

background: application of different sources of fatty acids and their effect on ovarian performance is a current issue in animal science and research centers. objectives: the purpose of this study was to determine the effect of different fatty acids in close-up period on population and size of follicles and measuring blood parameters related to the energy state of the body after calving of lact...

In this study, oil was extracted from the liver and visceral fat of Patin (Pangasianodon hypophthalmus) and refined. The yield of oil after refining was 49.98%. The major yield loss (34.20%) happened during the degumming procedure. Fatty acids found in the crude and refined oil were C12:0, C14:0, C14:1, C16:0, C16:1, C18:0, C18:1, C18:2, C18:3, C18:4, C20:0, C20:1, C20:4, C20:5, and C22:6. The ...

The IWA Anaerobic Digestion Modelling Task Group was established in 1997 at the 8th World Congress on Anaerobic Digestion (Sendai, Japan) with the goal of developing a generalised anaerobic digestion model. The structured model includes multiple steps describing biochemical as well as physicochemical processes. The biochemical steps include disintegration from homogeneous particulates to carboh...

this study was performed to determine the effects of different levels of chromium methionine (cr-met)supplementation on growth performance, meat oxidative stability and ruminal metabolites in male kids. thirty-two male mahabadi goat kids, with an average initial body weight (bw) of 22 ± 2 kg at 4 months of age, were allocated in a completely randomized design with four treatments: control witho...

Growth, cecal volatile fatty acids, mineral profile of plasma, liver weight and gastrointestinal weights were measured in rabbits fed isonitrogenous, equicaloric diets containing 3, 6, 9 or 12% dietary crude fiber from either alfalfa or Coastal Bermuda grass. Rabbits were fed from 4 to 8 wk of age. Alfalfa diets improved (P less than .05) average daily gain (20.5 vs 11.9 g/d) and livability (67...

to clarify fermentative alterations in the large intestine (hindgut) during grazing, fecal alcohol and volatile fatty acids (vfas) concentrations were evaluated in 30 dairy heifers. the heifers were kept in pasture growing mixed grass herbage from spring (mid may) until october, and their rectal feces were collected periodically. concentrations of ethanol, methanol and isopropanol were increase...