scholarly journals Factors influencing pressure-driven membrane-assisted volatile fatty acids recovery and purification-A review

2022 ◽  
pp. 152993
Author(s):  
Md. Nahid Pervez ◽  
Amir Mahboubi ◽  
Clarisse Uwineza ◽  
Tiziano Zarra ◽  
Vincenzo Belgiorno ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Volatile Fatty Acids ◽  
Factors Influencing ◽  
Pressure Driven

scholarly journals Factors influencing volatile fatty acids production from food wastes via anaerobic digestion

Bioengineered ◽  
2019 ◽  
Vol 11 (1) ◽  
pp. 39-52 ◽  
Author(s):  
Lukitawesa ◽  
Regina J. Patinvoh ◽  
Ria Millati ◽  
Ilona Sárvári-Horváth ◽  
Mohammad J. Taherzadeh
Keyword(s):  
Fatty Acids ◽  
Anaerobic Digestion ◽  
Volatile Fatty Acids ◽  
Food Wastes ◽  
Factors Influencing

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

2010 ◽  
Vol 56 (8) ◽  
pp. 667-675 ◽  
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.

The effects of increasing amounts of dietary tallow on milk-fat secretion in the cow

1973 ◽  
Vol 40 (2) ◽  
pp. 293-299 ◽  
Author(s):  
J. E. Storry ◽  
A. J. Hall ◽  
V. W. Johnson
Keyword(s):  
Fatty Acids ◽  
Mammary Gland ◽  
Milk Fat ◽  
Volatile Fatty Acids ◽  
Basal Diet ◽  
Dietary Fatty Acids ◽  
Dietary Intakes ◽  
Factors Influencing ◽  
Total Milk ◽  
Transfer To Milk

SummaryThe effects of 2, 4, 7 and 10% supplements of tallow to a basal diet low in fat on the composition of volatile fatty acids (VFA) in the rumen and on the secretion in milk of fat and its component fatty acids are reported. There were no significant effects of the tallow on rumen VFA or on the secretion of total milk fat. The yields in milk of stearic (18:0) and oleic (18:1) acids were positively correlated and those of palmitic (16:0) and myristic (14:0) acids negatively correlated with their respective dietary intakes. Apart from butyric acid which increased, the yields of other short-chain acids synthesized within the mammary gland decreased with increased intake of tallow. Possible factors influencing the output of total milk fat through a balance between increased transfer to milk of dietary fatty acids and decreased intramammary synthesis of fatty acids are discussed.

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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