نتایج جستجو برای: rumen function

تعداد نتایج: 1223510  

2000
R. J. Dewhurst D. R. Davies R. J. Merry

This paper considers the theory, assessment and prediction of microbial protein synthesis in the rumen. The dif®culties of techniques for assessing microbial protein synthesis, as well as the complexity of the rumen ecosystem, have limited progress. Inconsistencies in the literature undermine the value of incorporating advanced rumen models into rationing schemes and limit the exploitation of m...

2017
Kaizhen Liu Qin Xu Lizhi Wang Jiwen Wang Wei Guo Meili Zhou

OBJECTIVE This experiment was conducted to explore the impact of diet on the ruminal microbial community in goats. METHODS Twelve goats were divided into two groups and fed complete feed (CF) or all forage (AF) diet. The total microbial DNAs in the rumen liquid were extracted. The V4 region of microbial 16S rRNA genes was amplified and sequenced using high-throughput. Information of sequences...

2011
Sheikh Imran Adarsh Kumar S. P. Tyagi Amit Kumar Shivali Sharma

10 healthy Indian Jersey/Red Sindhi crossbred nonpregnant cows were subjected to transabdominal ultrasonography to develop baseline topographical data of the rumen. The wall of the rumen could be identified as a thick echogenic line adjacent to the left abdominal wall from left flank to 8th intercostal space. The motility pattern of rumen was characterized by approximately 1 contraction every m...

Journal: :The British journal of nutrition 1971
G W Mathison L P Milligan

I. 15NH4C1 was continuously infused for periods of 120-216 h into the rumens of sheep which were allowed to feed 2 out of every 10 min. These treatments achieved steady metabolic states and allowed the assessment of nitrogen conversions by means of tracer methodology. The sheep were given either a barley diet or one of three hay diets. In two trials, the flow of abomasal material was determined...

2015
Florence Privé C Jamie Newbold Naheed N. Kaderbhai Susan G. Girdwood Olga V. Golyshina Peter N. Golyshin Nigel D. Scollan Sharon A. Huws

Improving the health beneficial fatty acid content of meat and milk is a major challenge requiring an increased understanding of rumen lipid metabolism. In this study, we isolated and characterized rumen bacterial lipases/esterases using functional metagenomics. Metagenomic libraries were constructed from DNA extracted from strained rumen fluid (SRF), solid-attached bacteria (SAB) and liquid-as...

2015
Charles J. Newbold Gabriel de la Fuente Alejandro Belanche Eva Ramos-Morales Neil R. McEwan

First described in 1843, Rumen protozoa with their striking appearance were assumed to be important for the welfare of their host. However, despite contributing up to 50% of the bio-mass in the rumen, the role of protozoa in rumen microbial ecosystem remains unclear. Phylogenetic analysis of 18S rDNA libraries generated from the rumen of cattle, sheep, and goats has revealed an unexpected diver...

2012
Chiara Cannizzo Matteo Gianesella Stefania Casella Elisabetta Giudice Annalisa Stefani Luigi Michele Coppola Massimo Morgante

The aim of this study was to investigate the variations of vitamin B12 and homocysteine in blood of dairy cows during subacute ruminal acidosis (SARA). On 228 subjects ruminal liquid was collected through rumenocentesis technique and rumen pH was immediately measured by a portable pH-meter. On the basis of pH values all cows were classified (bovine class) in Group A (animals with rumen pH>5.7),...

1998
A. V. Klieve R. G. Holroyd A. F. Turner J. A. Lindsay

Rumen microbial populations were measured in Brahman-cross steers that were relocated from spear grass (Heteropogon contortus) dominant pastures in northern Queensland to buffel grass (Cenchrus ciliasis) dominant pastures in central Queensland, to assess whether aspects of rumen function may contribute to the sometimes reported depressed growth rates following relocation. Nine genera of ciliate...

2010
I N. Widiasa S. Johari Sunarso

Biogas productions of cattle manure using rumen fluid inoculums were determined using batch anaerobic digesters at mesophilic temperatures (room and 38.5 C). The aim of this paper was to analyze the influence of rumen fluid contents on biogas yield from cattle manure using fluid rumen inoculums. A series of laboratory experiments using 400 ml biodigester were performed in batch operation mode. ...

2014
Christopher J Creevey William J Kelly Gemma Henderson Sinead C Leahy

The goal of the Hungate1000 project is to generate a reference set of rumen microbial genome sequences. Toward this goal we have carried out a meta-analysis using information from culture collections, scientific literature, and the NCBI and RDP databases and linked this with a comparative study of several rumen 16S rRNA gene-based surveys. In this way we have attempted to capture a snapshot of ...

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