scholarly journals In Vitro Versus in Situ Ruminal Biohydrogenation of Unsaturated Fatty Acids from a Raw or Extruded Mixture of Ground Canola Seed/Canola Meal

2003 ◽  
Vol 86 (1) ◽  
pp. 351-359 ◽  
Author(s):  
F. Enjalbert ◽  
P. Eynard ◽  
M.C. Nicot ◽  
A. Troegeler-Meynadier ◽  
C. Bayourthe ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Unsaturated Fatty Acids ◽  
Canola Meal ◽  
Canola Seed ◽  
Ruminal Biohydrogenation

scholarly journals Effects of preconditioning and extrusion of linseed on the ruminal biohydrogenation of fatty acids. 2. In vitro and in situ studies

2006 ◽  
Vol 55 (4) ◽  
pp. 261-271 ◽  
Author(s):  
Fowad Akraim ◽  
Marie-Claude Nicot ◽  
Pierre Weill ◽  
Francis Enjalbert
Keyword(s):  
Fatty Acids ◽  
In Situ Studies ◽  
Ruminal Biohydrogenation

scholarly journals Influence of fish oil on ruminal biohydrogenation of C18 unsaturated fatty acids

2006 ◽  
Vol 95 (6) ◽  
pp. 1199-1211 ◽  
Author(s):  
I. Wąsowska ◽  
M. R. G. Maia ◽  
K. M. Niedźwiedzka ◽  
M. Czauderna ◽  
J. M. C. Ramalho Ribeiro ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Linoleic Acid ◽  
Fish Oil ◽  
Unsaturated Fatty Acids ◽  
Butyrivibrio Fibrisolvens ◽  
Isomerase Activity ◽  
Epa And Dha ◽  
Pure Cultures ◽  
Ruminal Biohydrogenation

Dietarycis-9,trans-11-conjugated linoleic acid (CLA) is generally thought to be beneficial for human health. Fish oil added to ruminant diets increases the CLA concentration of milk and meat, an increase thought to arise from alterations in ruminal biohydrogenation of unsaturated fatty acids. To investigate the mechanism for this effect,in vitroincubations were carried out with ruminal digesta and the main biohydrogenating ruminal bacterium,Butyrivibrio fibrisolvens. Linoleic acid (LA) or α-linolenic acid (LNA) was incubated (1·67g/l) with strained ruminal digesta from sheep receiving a 50:50 grass hay–concentrate ration. Adding fish oil (up to 4·17g/l) tended to decrease the initial rate of LA (P=0·025) and LNA (P=0·137) disappearance, decreased (P<0·05) the transient accumulation of conjugated isomers of both fatty acids, and increased (P<0·05) the accumulation oftrans-11-18:1. Concentrations of EPA (20:5n-3) or DHA (22:6n-3), the major fatty acids in fish oil, were low (100mg/l or less) after incubation of fish oil with ruminal digesta. Addition of EPA or DHA (50mg/l) to pure cultures inhibited the growth and isomerase activity ofB. fibrisolvens, while fish oil had no effect. In contrast, similar concentrations of EPA and DHA had no effect on biohydrogenation of LA by mixed digesta, while the addition of LA prevented metabolism of EPA and DHA. Neither EPA nor DHA was metabolised byB. fibrisolvensin pure culture. Thus, fish oil inhibits ruminal biohydrogenation by a mechanism which can be interpreted partly, but not entirely, in terms of its effects onB. fibrisolvens.

Ruminal biohydrogenation of unsaturated fatty acids in vitro as affected by chitosan

2010 ◽  
Vol 159 (1-2) ◽  
pp. 35-40 ◽  
Author(s):  
I. Goiri ◽  
G. Indurain ◽  
K. Insausti ◽  
V. Sarries ◽  
A. Garcia-Rodriguez
Keyword(s):  
Fatty Acids ◽  
Unsaturated Fatty Acids ◽  
Ruminal Biohydrogenation

scholarly journals PSVII-35 Late-Breaking Abstract: Microwave heat treatment feed effect on ruminal degradability and intestinal protein digestibility - a brief review

2020 ◽  
Vol 98 (Supplement_4) ◽  
pp. 342-343
Author(s):  
Md Safiqur Rahaman Shishir ◽  
Muhammad Jamal Khan ◽  
Hassan Khanaki ◽  
Graham Brodie ◽  
Brendan Cullen ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Protein Digestibility ◽  
Soya Bean ◽  
Canola Meal ◽  
Canola Seed ◽  
Intestinal Protein ◽  
Bean Meal ◽  
Ruminal Degradability ◽  
Soya Bean Meal

Abstract Rumen degradability of crude protein (CP) of feed is a major factor that determines the utilization of CP in ruminant production. This study briefly reviewed the findings from six international studies of microwave (MW) heat treatment effect on feed CP rumen degradability and intestinal CP digestibility. Six in vitro studies of concentrate feed (canola seed, canola meal, soya bean meal, cottonseed meal, corn, and barley) showed a decrease in effective rumen degradability of dry matter and protein by 4–40% and 17–40%, respectively compared to control group (untreated concentrate feed). Among the six studies, four studies identified the MW heat treatment effect on intestinal protein digestibility. Due to MW heat treatment, canola seed, canola meal, soya bean meal, and cottonseed meal showed an increase in intestinal CP digestibility by 17%, 20%, 21%, and 19%, respectively. Overall the briefly reviewed studies showed that, MW heat treatment substantially reduced feed CP ruminal degradability and increased in vitro CP digestibility of ruminally undegraded CP.

Inhibition of binding of gonadal steroids to serum binding proteins by non-esterified fatty acids: the influence of chain length and degree of unsaturation

1989 ◽  
Vol 120 (2) ◽  
pp. 175-179 ◽  
Author(s):  
C. Street ◽  
R. J. S. Howell ◽  
L. Perry ◽  
S. Al-Othman ◽  
T. Chard
Keyword(s):  
Fatty Acids ◽  
Protein Binding ◽  
Unsaturated Fatty Acids ◽  
Late Pregnancy ◽  
Sex Hormone Binding Globulin ◽  
Partial Purification ◽  
Normal Female ◽  
Esterified Fatty Acids ◽  
Vitro Binding

Abstract. The effect of non-esterified fatty acids (NEFA) on the in vitro binding of testosterone, 5-alpha dihydrotestosterone and estradiol E2 to sex hormone binding globulin (SHBG) was examined using pooled normal female serum, and SHBG and albumin fractions obtained from the partial purification of late pregnancy serum. A range of saturated and unsaturated fatty acids were examined for their effect on steroid-protein binding. In normal female serum, NEFA added at physiological concentrations disrupted steroid-protein binding. The shorter chain (C8–C12) saturated acids and the poly-unsaturated acids proved to be more effective inhibitors than the longer chain saturated or mono-unsaturated acids. The greatest inhibition was obtained with E2 whereas the binding of dihydrotestosterone was least affected. With partially purified SHBG, the same concentrations of NEFA were less effective at inhibiting the binding of dihydrotestosterone and testosterone but elicited the same effect with E2. The binding of steroids to albumin appeared to be unaffected by these concentrations of NEFA.

Hydrothermal catalytic processing of saturated and unsaturated fatty acids to hydrocarbons with glycerol for in situ hydrogen production

2014 ◽  
Vol 16 (3) ◽  
pp. 1507 ◽  
Author(s):  
Derek R. Vardon ◽  
Brajendra K. Sharma ◽  
Humberto Jaramillo ◽  
Dongwook Kim ◽  
Jong Kwon Choe ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Hydrogen Production ◽  
Unsaturated Fatty Acids ◽  
Catalytic Processing

scholarly journals EFFECTS OF DIETARY CANOLA SEED ON PIG PERFORMANCE AND BACKFAT COMPOSITION

1980 ◽  
Vol 60 (3) ◽  
pp. 795-797 ◽  
Author(s):  
A. G. CASTELL ◽  
L. FALK
Keyword(s):  
Fatty Acids ◽  
Unsaturated Fatty Acids ◽  
Finishing Pigs ◽  
Canola Seed ◽  
Live Performance ◽  
Pig Performance

Pelleted diets containing from 0 to 15% canola seed were fed twice daily to growing-finishing pigs. Live performance and carcass measurements were not adversely affected, but level of canola seed directly influenced the proportions of unsaturated fatty acids (especially linoleic and linolenic) in the backfat.

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