Biomedical subjects

M Journet

Publications and source records attributed to M Journet.

11 recordsLinked to original sources

PubMed1987

[Development of feeding activities in dairy cows at the start of lactation and relation to the quantities of feed ingested].

Feeding behaviour was measured in 12 multiparous dairy cows all day long during the first 5 weeks of lactation. These cows received corn silage ad libitum and concentrates representing 21 to 27% of total dry matter intake, depending on the week. During the first week of lactation, total eating and ruminating times were 364 and 426 min; eating and ruminating rates were 39.0 and 32.5 g DM/min. The feed intake increase during the first 5 weeks of lactation was accompanied by an increase in ruminating time (+ 22%) and eating rate (+ 26%). These two parameters were very sensitive to short-time decreases in DM intake. Animal variations of eating and ruminating rates, but not variations of total eating and ruminating times, were related to those of dry matter intake. Thus, animals which had the highest dry matter intake were those which had the highest eating and ruminating rates.

Animal Feed↗

PubMed1985

[Various blood parameters of energy metabolism in dairy cows at the start of lactation].

Thirty eight lactating dairy cows were given ad libitum a diet of maize silage supplemented with concentrate (3 to 5.5 kg/day). Five blood samples were taken from 25 cows from the last week of pregnancy to the 8th week of lactation. The other thirteen cows were subjected to a more frequent sampling (three times a week during the first five weeks of lactation). Each plasma sample was analyzed in order to assess its glucose, acetone, beta-hydroxybutyrate and non-esterified fatty acids contents. The glucose content of the plasma was minimum and the acetone content was maximum at the end of the second week of lactation when the cumulated energy balance was at its most negative level. It appeared that the individual glucose and acetone contents were closely related to the cumulated energy balance, while the non esterified fatty acids content was closely related to the energy balance at the time of sampling. From all the data obtained, a good negative curvilinear relation between the glucose content and the ketone bodies content was observed. These results are discussed with the mobilization of body reserves during the early lactation and its consequences.

3-Hydroxybutyric Acid↗

PubMed1982

[Syncope with a rare etiology, cardiac hydatidosis].

A case of left ventricular hydatid disease causing mitral insufficiency and revealed by accelerated idioventricular rhythm (AIVR) is reported. The traditional and more recent diagnostic procedures including echocardiography and immunology are reviewed. The persistence of AIVR and mitral insufficiency after excision of the cyst are discussed with respect to the surgical treatment.

Adult↗

PubMed1981