Détermination de la courbe de dissociation standard de l''oxyhémoglobine du cheval et influence, sur cette courbe, de la température, du pH et du diphosphoglycérate.

The equine blood oxyhemoglobin dissociation curve has been traced in its entirety in standard conditions and the effects of temperature, pH and 2,3-diphosphoglycerate on this curve have been measured. When compared to that of human blood, the curve showed a higher oxygen affinity of hemoglobin (23.8 +/- 0.8 versus 26.6 mm Hg). The effect of the pH, expressed by d log P50/dpH, was found to be identical in man and horse (-0.47). The effect of temperature, however, expressed by d log P50/dT, proved to be lower in the horse (0.016 versus 0.024). The P50 showed an increase of 1 mm Hg each time 2,3-diphosphoglycerate was experiencing an elevation of 4 mumol/gHb in the horse. The results obtained from this experiment are intended for the replacement of the values related to the human blood which have been found to be somewhat inadequate for the horse blood, when the data of blood gases are given in algorithms.     

Influence du Cadmium sur l;Intestin de Carassius Auratus

The influence of cadmium on Carassius auratus gut. The paper deals with the cadmium effects on the intestinal mucosa of adult Carassius auratus after 7, 14 and 40 days of exposure. After 7 days the mucosa becomes oedematous; the mucous cells show intensive secretion. The cells showing immunoreactivity for the Met- and Leuenkephaline miss this feature. After 14 days these modifications diminish and after 40 days disappear completely and the mucosa gains its normal characteristics.     

Vascularisation artérielle de l''intestin du Rat musqué (Ondatra zibethicus)

The arterial vascularization of the intestines of the muskrat ( Ondatra zibethicus )
This study is based on dissection of 12 adult muskrats whose arteries were injeced with latex. The main branching patterns of the cranial and caudal mesenteric arteries for the different segments of the gut are described. The position and the branching of the arteries of the muskrat are comparable to those of the laboratory rat and the American beaver. In general, the distribution patterns are reminiscent of the laboratory rat and less so of the American beaver.     

Isolement du virus de la rhino-trachéite infectieuse bovine à partir du liquide synovial du tarse d''un taureau

Isolation of infectious bovine rhinotracheitis virus from the tarsal joint of a bullInfectious bovine rhinotracheitis virus was isolated from the right tarsal joint of a bull who was showing signs of a systemic viral infection. The clinical signs manifested by 16 bulls of this herd are described, the laboratory methods used are listed and the results are analysed and discussed.     

Nerfs de la main et du pied du boeuf |Note 1: Nerfs de la main

The nerves of the bovine manus were dissected in twenty forelimbs. Numerous variations were found, and it was possible to work out a basic pattern of distribution.     

étude Histomorphométrique des Variations Morphologiques du Follicule Thyroïdien chez le Rat en Fonction de l''âge et du Sexe

The thyroid glands of male and female rats (Sprague Dawley) 10 to 60 weeks of age were examined histomorphometrically. The results show a clear sex dimorphism. The thyroid follicles in the male animals show a greater functional activity than in the female animals. But while the morphology of the follicles in the females was constant throughout the period of observation, in the males the activity gradually diminished.     

Analyse de la composition du liquide céphalo-rachidien chez le porcelet nouveau-né.

Cerebrospinal fluid composition has been studied in low and normal birthweight piglets. Values for urea, Ca, K, Cl and P did not differ between the two groups. However, glucose concentration was lower in low birthweight subjects and Mg and Na values were higher. Total leukocytes were also higher in low birthweight piglets. These differences may suggest that blood-brain-barrier is not at the same stage of maturation in low birthweight as in normal birthweight subjects.