Response of One-Humped Camel (Camelus dromedarius) to Intravenous Glucagon Injection and to Infusion of Glucose and Volatile Fatty Acids, and the Kinetics of Glucagon Disappearance from the Blood

1999 ◽  
Vol 46 (8) ◽  
pp. 473-481 ◽  
Author(s):  
M. Abdel-Fattah ◽  
H. Amer ◽  
M. A. Ghoneim ◽  
M. Warda ◽  
Y. Megahed
Keyword(s):  
Fatty Acids ◽  
Volatile Fatty Acids ◽  
Camelus Dromedarius ◽  
Glucagon Injection ◽  
Kinetics Of

scholarly journals Derivation of volatile fatty acids concentration-independent optimum trace elements configuration and elucidation of optimization kinetics of biomethanization processes

2021 ◽  
Vol 38 (1) ◽  
pp. 194-208
Author(s):  
N.C. Ezebuiro
Keyword(s):  
Fatty Acids ◽  
Trace Elements ◽  
Volatile Fatty Acids ◽  
Desirability Function ◽  
Surface Model ◽  
Maximum Reaction Rate ◽  
Maximum Reaction ◽  
Two Parameters ◽  
Effective Use ◽  
Kinetics Of

Trace elements (TEs) requirements for improved volatile fatty acids (VFA) degradation during biomethanization depend on VFA  concentration of a reactor and the temperature of the process. While temperature remains relatively constant, VFA concentrations change in the course of biomethanization and this implies that for efficient VFA degradation, different trace elements configurations (TEC) should be supplemented. While this is the most efficient approach, it is impractical and constitutes a challenge for the effective use of TEs in the optimization of biomethanization processes. To alleviate this challenge, we modelled the biomethanization efficiency of various VFA  concentration-dependent (VCD) TEs configuration as scenarios and derived a TEs configuration that produced optimum biomethanization across a wider range of VFA concentrations. The study was carried out at 37oC using different concentrations of fixed VFA composition and TEs configurations as scenarios. Response surface model and desirability function were used to determine and compare the  biomethanization efficiency of the scenarios, and to derive a VFA concentration-independent (VCI) TEs configuration. Michaelis-Menten kinetics for two parameters was used to ascertain that the mechanism by which TEs supplementation enhanced mesophilic biomethanization was through an increase in maximum reaction rate (MRR). However, the enhancement was accompanied by an  insignificant decline in inverse affinity (IA).

scholarly journals Influence of wet vs. dry by-product ingredients and addition of branched-chain volatile fatty acids and valerate to dairy diets. 3. Kinetics of rumen ingesta turnover, whole tract digestibility, and some plasma hormone concentrations.

1987 ◽  
Vol 35 (4) ◽  
pp. 459-471
Author(s):  
P.H. Robinson ◽  
S. Tamminga ◽  
A.M. van Vuuren
Keyword(s):  
Fatty Acids ◽  
Volatile Fatty Acids ◽  
Plasma Concentrations ◽  
Maize Silage ◽  
Dietary Nitrogen ◽  
Beet Pulp ◽  
Methyl Butyrate ◽  
Branched Chain ◽  
Gluten Feed ◽  
Kinetics Of

Four cows with rumen cannulae were fed twice daily on totally mixed diets containing equal amounts of hay crop silage and maize silage plus a mixture of maize gluten feed, beet pulp and brewers' grains. Diets contained wet ensiled (WET) or dry (DRY) byproduct ingredients without (MINUS) or with (PLUS) a supplement (ISOPLUSReg.) containing the branched-chain volatile fatty acids (isoacids) isobutyrate, 2-methyl butyrate, and 3-methyl butyrate, as well as valerate. Measurements were made from weeks 12 to 28 of lactation to determine effects of treatments on whole tract digestibility, kinetics of rumen ingesta turnover, and plasma concentrations of insulin and somatotropin. Whole tract apparent digestibility of organic (OM) and most OM components was higher with WET diets. Estimated true digestion of dietary nitrogen and OM were also higher (P

Unravelling a microbial synergy to boost caproate production via carboxylates chain elongation with ethanol

2019 ◽  
Vol 26 (2) ◽  
pp. 63-71
Author(s):  
Ling Leng ◽  
Ying Wang ◽  
Peixian Yang ◽  
Takashi Narihiro ◽  
Masaru Konishi Nobu ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Volatile Fatty Acids ◽  
Microbial Consortia ◽  
Chain Elongation ◽  
Desulfovibrio Vulgaris ◽  
Rrna Gene ◽  
Selective Enrichment ◽  
Microbial Network ◽  
Cost Efficient ◽  
Rrna Gene Sequencing

Chain elongation of volatile fatty acids for medium chain fatty acids production (e.g. caproate) is an attractive approach to treat wastewater anaerobically and recover resource simultaneously. Undefined microbial consortia can be tailored to achieve chain elongation process with selective enrichment from anaerobic digestion sludge, which has advantages over pure culture approach for cost-efficient application. Whilst the metabolic pathway of the dominant caproate producer, Clostridium kluyveri, has been annotated, the role of other coexisting abundant microbiomes remained unclear. To this end, an ethanol-acetate fermentation inoculated with fresh digestion sludge at optimal conditions was conducted. Also, physiological study, thermodynamics and 16 S rRNA gene sequencing to elucidate the biological process by linking the system performance and dominant microbiomes were integrated. Results revealed a possible synergistic network in which C. kluyveri and three co-dominant species, Desulfovibrio vulgaris, Fusobacterium varium and Acetoanaerobium sticklandii coexisted. D. vulgaris and A. sticklandii (F. varium) were likely to boost the carboxylates chain elongation by stimulating ethanol oxidation and butyrate production through a syntrophic partnership with hydrogen (H2) serving as an electron messenger. This study unveils a synergistic microbial network to boost caproate production in mixed culture carboxylates chain elongation.

МЕТАБОЛИТЫ ПРОБИОТИЧЕСКИХ БАКТЕРИЙ ОТВЕЧАЮТ ЗА ЭФФЕКТИВНОСТЬ ДЕЙСТВИЯ ПРОБИОТИКА "ПРОФОРТ®"

2019 ◽  
Keyword(s):  
Fatty Acids ◽  
Volatile Fatty Acids ◽  
Broiler Chicks ◽  
Bacillus Sp

МЕЛИКИДИ В.Х., ТЮРИНА Д.Г., СЕЛИВАНОВ Д.Г., НОВИКОВА Н.И. ООО «БИОТРОФ», Санкт-Петербург Аннотация: Приведены данные исследования методом газожидкостной хроматомасс-спектрометрии метаболитов, синтезируемых пробиотическими бактериями, входящими в состав кормовой добавки «Профорт®». Проведен опыт в условиях интенсивного промышленного птицеводства по применению кормовой добавки «Профорт®» (50 тыс. голов бройлеров в группе). Среди метаболитов пробиотических штаммов Enterococcus sp. и Bacillus sp. обнаружены такие полезные вещества, как молочная кислота, уксусная, пропионовая и другие короткоцепочечные (летучие) жирные кислоты, активные пептиды. Результаты зоотехнического опыта показали, что при скармливании бройлерам пробиотика «Профорт®» (500 г/т) живая масса при убое в 40 дней была выше контроля на 6,9%, конверсия корма улучшилась на 3,0%, а европейский индекс продуктивности бройлеров - на 5,69%. Ключевые слова: ПРОБИОТИКИ, МЕТАБОЛИТЫ, ЛЕТУЧИЕ ЖИРНЫЕ КИСЛОТЫ, ЦЫПЛЯТА-БРОЙЛЕРЫ,ПРОДУКТИВНОСТЬ, PROBIOTICS, METABOLITES, VOLATILE FATTY ACIDS, BROILER CHICKS,PRODUCTIVITY

Studies on the Levels of Volatile Fatty Acids for Growing-Fattening Lambs

1962 ◽  
Vol 21 (1) ◽  
pp. 37-40 ◽  
Author(s):  
H. W. Essig ◽  
U. S. Garrigus ◽  
B. Connor Johnson
Keyword(s):  
Fatty Acids ◽  
Volatile Fatty Acids
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