Showing papers in "Vidyodaya Journal of Science in 1989"
Journal Article•
TL;DR: The study was oarried out on three species of fish which are commerciallyimportant and presently cultivated in Sri Lanka and found that all values were higher in the Oreochromis species compared to Chanos, andverse relationships between erythrocyte count and volume and between cell count and Hb content were observed.
Abstract: The study was oarried out on three species of fish which are commerciallyimportant and presently cultivated in Sri Lanka. These are Oreochromismossambicus, Oreochromis niloticus and Chanos chanos. Blood parametersmeasured in the resting state for the three species were haematocrit, erythrocytecounts and haemoglobin concentrations. From these findings the followingwere calculated. The Hb content per single erythrocyte, the Hb concentration per single erythrocyte and volume of a single erythrocyte. It wasfound that all these values were higher in the Oreochromis species comparedto Chanos. Inverse relationships between erythrocyte count and volume ofa single erythrocyte and between cell count and Hb content per single erythrocyte were observed. O2 capacities and O2 dissociation curves were also determined. The effect of pH on 0. affinity was also studied. In vivo experimentswere conducted to measure rates of 02 consumption in the resting state of fish.
Journal Article•
TL;DR: The present study was made in order to carry out further genetic investigations of two mutants ct wing and mcl wing isolated by Bogabawatta in 1982, and found that these two allele are unstable.
Abstract: Ab.stract The present study was made in order to carry out further genetic investigations of two mutants ct wing and mcl wing isolated by Bogabawatta in 1982. These two mutants were observed to be recessive and sex-linked, but were also seen not to -strictly obey Mendelian rules. In the absence of the wild allele the mutants allele behaves in a peculiar manner. Each mutantallele is capable of producing all the types of mutants such as ct wing mcl wing, and ct-mcl wing along with the wild types. The most probable explanation for this peculiar behaviour is that these two allele are unstable.
TL;DR: It is concluded that the antifertility effect resulted primarily from oligospermia due to dysfunctioning of seminal emission and/or ejaculation.
Abstract: Insertion of silastic rods containing 25% and 50% atropine adjacent to the epididymis of rats produced a significant suppression in fertility which was temporary with the lower dose and permanent with the higher dose. Both doses also impaired the motility of epididymal spermatozoa and nerve-mediated contractile response of isolated vasa deferentia. In addition, the higher dose caused a significant reduction in the mating frequency. It is concluded that the antifertility effect resulted primarily from oligospermia due to dysfunctioning of seminal emission and/or ejaculation.