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Articles by B.C. Das
Total Records ( 4 ) for B.C. Das
  D. Biswas , S. Das , B.C. Das and A.K.M. Saifuddin
  A 9-year-old virgin German shepherd was admitted with continuous sanguinopurulent vaginal discharge, distended abdomen, and cachexia. The dog was clinically diagnosed with pyometra and successfully cured by ovario-hysterectomy. The results of histo-pathological examination showed that the endometrial glands were larger than normal and that part of the endometrial wall had sloughed off and become infiltrated with mostly neutrophils. This is the first case report of endometritis and cystic endometrial hyperplasia in a virgin German shepherd in Bangladesh.
  S. Shanmughapriya , G. Senthilkumar , S. Arun , B.C. Das and K. Natarajaseenivasan
  A case-control study to identify the risk factors for ovarian carcinoma in Tiruchirapalli district, Tamilnadu, India a low incidence population was conducted. The invasive epithelial ovarian cancer case patients were 37. The control group consisted of 74 healthy women, matched according to age categories. Subjects were interviewed in person regarding socio demographic and reproductive characteristics. The unconditional logistic regression was performed and tests of statistical significance were based on difference in the log likelihoods and all p values were 2-sided. In logistic regression analysis, the risk of ovarian cancer was strongly related to the increased physical activity (OR: 3.227, 95% CI: 1.143, 9.108), intake of high fat (OR: 6.286, 95% CI: 0.779, 50.701) early age at menarche (OR: 6.389, 95% CI: 2.143, 19.047), post menopausal status (OR: 3.22, 95% CI: 1.417, 7.316). The use of contraceptive methods, tubal ligation, one birth, late menarche was found to be inversely associated with ovarian cancer risk. The risk of ovarian cancer decreased 80% by one birth event, 40% by use of contraceptives and tubal ligation and six times reduced risk for menarche at later age. The present study thus clearly typified this neoplasm as hormone dependent and it is possible to establish that "ovulation" mechanism determine the level of risk for ovarian cancer in this study population. In addition, the difference in the distribution of histologic subtypes in this population compared with high-incidence populations may point to further differences in risk factors.
  M. Aftab Hossain , M. Mahbubur Rahman Gazi , Nusrat Zahan and B.C. Das
  Population density of Sissoo plant infesting eriophyid mite, A. dalbergiae and toxicity of some insecticides on it were studied from April to December 2000. The mite population differed significantly in different months (P<0.001) and different collection cites (P<0.001). Highest population (6.4519±0.19) was observed in the month of May and the lowest (1.8370±0.29) was in August. All test insecticides were toxic to adult mites. The calculated LD50 values of lambda cyhalothrin, malathion, cypermethrin and chlorpyrifos were 0.0541, 0.1760, 0.3249 and 0.6166 μg/cm2 respectively. Lambda cyhalothrin was found to be comparatively more toxic. The order of toxicity was lambda cyhalothrin> malathion > cypermethrin >chlorpyrifos
  B.C. Das , S. Habib , M. Chowdhury , M.I. Hossain and M.H. Islam
  The duration of storage of frozen bull semen with acceptable quality without pouring any liquid nitrogen into 2-liter container was investigated under field conditions. One frozen straw of each of the 3 donor bulls was evaluated daily for 15 days with regard to sperm motility and normal sperm morphology with respect to acrosome, mid-piece and tail. When frozen semen straws were stored within 2-liter liquid nitrogen (LN) container without pouring any LN into the container up to 15 days of storage, the sperm motility and normal sperm morphology decreased gradually up to 10 days of storage and then the sperm motility and the normal sperm morphology decreased significantly (P<0.001). The motility did not differ significantly between bulls. However, the proportion of normal sperm morphology varied significantly between bulls (P<0.001). In conclusion, frozen bull semen straws can be stored in 2-liter liquid nitrogen (LN) container with acceptable quality for 10 days without any LN under field conditions in Bangladesh.
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