Robin, J Berthiaume, L
Published in
Revue canadienne de biologie / éditée par l'Université de Montréal
Lymphocystis disease virus was highly purified from host cells by precipitation with PEG-6000 and isopycnic centrifugation in a metrizamide gradient. Metrizamide gradient centrifugation produce two distinct bands at equilibrium. As calculated from reconstruction experiments, only 4 and 0.3% respectively of the host DNA and the host proteins were re...
Kates, M Tremblay, P A
Published in
Revue canadienne de biologie / éditée par l'Université de Montréal
Lecithin does not exist in the marine diatom, Nitzschia alba, being completely replaced by phosphatidylsulfocholine (PSC), the sulfonium analogue of phosphatidylcholine (PC). Thus, the question arises: how can PSC effectively replace lecithin in a natural membrane? We have compared the physical properties of a homologous series of synthetic PSC's (...
Billard, R
Published in
Revue canadienne de biologie / éditée par l'Université de Montréal
Isolation and washing experiments were carried out to test the respective influences of coelomic and seminal fluids on gamete fertilizing ability. Isolating or washing gametes in salt solutions similar to the accompanying medium did not alter their fertility. On the contrary, the fertilization rate was lower when ova and spermatozoa were washed bef...
Seufert, W D Lachiver, G Bessette, F
Published in
Revue canadienne de biologie / éditée par l'Université de Montréal
We discuss the various preparations of substitute pulmonary surfactant that have been proposed for the treatment of Respiratory Distress Syndrome in premature infants. We than submit some experimental results demonstrating that a preparation of phospholipids in an organic solvent can simulate the behavior of the naturally occurring pulmonary surfac...
Hamelin, C Poliquin, L Chung, Y S
Published in
Revue canadienne de biologie / éditée par l'Université de Montréal
Bazin, M Turcotte, H Lagacé, R Boutet, M
Published in
Revue canadienne de biologie / éditée par l'Université de Montréal
The permeability of aortic endothelium and myocardial capillaries was examined in 72 Sprague-Dawley rats (approximately 350 g) using the diffusion tracer peroxidase. Animals were subjected to cigarette smoke for periods of 1 day (acute effects), 2 weeks (sub-acute effects) and 15 weeks (chronic effects) and were sacrificed 5 minutes or 8 hours afte...
Sarkar, K Kinson, G A Narbaitz, R
Published in
Revue canadienne de biologie / éditée par l'Université de Montréal
When maintained on a potassium deficient diet 21 day-old weanling rats ceased to grow. At the end of 3 weeks, the testes were small and the diameter of seminiferous tubules was reduced. The reduction of the tubular diameter resulted mainly from a decrease in the number of cells, chiefly spermatids. An occasional tubule contained a few scattered spe...
Pirlot, P
Published in
Revue canadienne de biologie / éditée par l'Université de Montréal
Using a volumetric method and the classical allometry equation, the author investigates the possibility of a relationship between the size of total brain or brain-components and the ecology of ethology of 29 marsupials species from South-America and Australia. He shows that there is a relation between brain and neocortex volumes, and the taxonomic ...
Rondeau, M Rouleau, M
Published in
Revue canadienne de biologie / éditée par l'Université de Montréal
Using semen from bull, boar and stallion as well as different spectrophotometers, we established the calibration curves relating the optical density of a sperm sample to the sperm count obtained on the hemacytometer. The results show that, for a given spectrophotometer, the calibration curve is not characteristic of the animal species we studied. T...
Ozanne, G
Published in
Revue canadienne de biologie / éditée par l'Université de Montréal
We have studied the phenomena of inapparent chlamydial infections in vitro using McCoy cells in culture as hosts and low doses of Chlamydia psittaci (GP-IC) as infecting agents. The results indicate that GP-IC can persist undetected at least 220 hrs in McCoy cells previously inoculated with 0.2 mL of a GP-IC preparation containing 30 ifu/mL, using ...
