Volume 02 No. 01 & 02 July 1990
http://dr.lib.sjp.ac.lk/handle/123456789/751
2024-03-29T12:45:53ZEffects of Orchiectomy on Exploratory Behaviour of Rats
http://dr.lib.sjp.ac.lk/handle/123456789/784
Effects of Orchiectomy on Exploratory Behaviour of Rats
Ratnasooriya, W.D.; Caldera, H.S.
This study was designed to assess whether the testes influence the
exploratory behaviour of rats. The results show that orchiectomy
parameters of exploratory behaviour, namely the number of head dips,
locomotory significantly impaired three activity and number of rears,
when evaluated using the hole-board technique. The fourth parameter
tested, the time spent head dipping however remained unaltered.
These fidings suggest that .some [actor]: secreted by testes influence
exploratory behaviour.
1990-01-01T00:00:00ZFood Partitioning in Four Species of Penaeid Prawns in the Bolgoda Lagoon Sri Lanka
http://dr.lib.sjp.ac.lk/handle/123456789/783
Food Partitioning in Four Species of Penaeid Prawns in the Bolgoda Lagoon Sri Lanka
Jinadasa, J.
Penaeid prawns of the Bolgoda Lagoon feed on Carldina spp, clams,
Harpacticoid spp, Nerine and Nereis spp fish larvae, diatoms, green
leafy matter and detritus. Their frequency of occurance and the number
of crops containing a particular diet varies from species to species studied.
The overlap co-efficient of food between two species of the same genus is
greater than that of two species of two different genera. vacuity
index of M. ensis indicated seasonality in feeding. The distribution of
prawns in the lagoon has a direct relationship to the benthic fauna
fiand ora.
1990-01-01T00:00:00ZEffect of Carbachol on Fertility of Male Rats When Administered Locally to Epididymis
http://dr.lib.sjp.ac.lk/handle/123456789/782
Effect of Carbachol on Fertility of Male Rats When Administered Locally to Epididymis
Ratnasooriya, W.D.
This study examines the effect of carbachol, a potent cholinoceptor agonist
drug, on fertility of male rats, when administered to epididymis using stlastic
formulations, in the form of rods. 10% and 25% carbachol rods were
found to be toxic, and resulted in death within 25 min. On the other hand,
5% rods were tolerable. These rods significantly reduced sperm numbers
both in the cauda epididymis and ejaculate but failed to Impair fertility.
Libido (sexual desire) remained essentially unaltered. In organ bath experiments,
carbachol induced rhythmic contrations in isolated vasa deferentia
and cauda epididymal tubules in a ' dose-related manner.
1990-01-01T00:00:00ZTheory of the Determination of Refractive Index by the Total Internal Reflection Method
http://dr.lib.sjp.ac.lk/handle/123456789/781
Theory of the Determination of Refractive Index by the Total Internal Reflection Method
Tantrigoda, D.A.
1990-01-01T00:00:00Z