May 2015

The mating behaviour of the banana weevil, Cosmopolites sordidus Germar (Coleoptera : Curculionidae)

The banana weevil, Cosmopolites sordidus Germar mates repeatedly in its lifetime. No elaborate courtship behavior was seen before mating in the laboratory. However, ‘sniffing’ (an activity by which male weevils used their antennae to contact the abdominal tip of the female, as if to perceive some stimulus), often preceded mating. This observation may be an indication of a chemical pheromone involved in the...

Author(s): Richard P. Uzakah and Johnson A. Odebiyi

May 2015

Etio-pathological investigations to study the gross and histopathological lesions affecting gastrointestinal tract of sheep

Thirty sheep/lambs were brought for post mortem in Teaching Veterinary Clinical Complex, LUVAS and Central Sheep Breeding Farm, Hisar, which were investigated for gastrointestinal tract pathology in laboratory of Department of Veterinary Pathology. Mortality was maximum in sheep/lambs of age group 6 months to 1 year and higher in males than females. Gross pathological changes in gastro intestinal system noticed were...

Author(s): S. Kumar, K. K. Jakhar and A. D. Singh

May 2015

Investigations on the photoconductivity studies of ZnSe, ZnS and PbS thin films

Zinc selenide (ZnSe), zinc sulphide (ZnS) and lead sulphide (PbS) thin films were prepared by chemical bath deposition (CBD) method. In this paper we report results on the photoconductivity behaviour of ZnSe, ZnS and PbS thin films. Photoconductivity measurements were carried out at room temperature by connecting it in series with a picoammeter (Keithley 480) and a dc power supply. Photoconductivity processes may be the...

Author(s): S.Thirumavalavan, K. Mani and S. Sagadevan