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Articles by S.K. Das
Total Records ( 8 ) for S.K. Das
  S.M.L. Kabir , M.M. Rahman , M.B. Rahman , M.Z. Hosain , M.S.I. Akand and S.K. Das
  The present research was conducted on Hubbard Isa Starbro broilers to evaluate the dynamics of probiotics relating to balanced growth of intestinal flora and histological reactions and changes within the crop and cecal tissues. A total of eighty day-old broiler chicks were divided into four groups of equal numbers as group A (Probiotics fed group vaccinated), B (Probiotics fed group nonvaccinated), C (Conventional fed group vaccinated) and D (Conventional fed group nonvaccinated). Group C and D were taken as control birds fed with commercial ration and groups A and B as experimental birds were fed with commercial ration with the addition of 2 g probiotics (Protexin® Boost)/10 L drinking water upto 6th week of age. The effect of probiotics with regard to clearing bacterial infections and regulating intestinal flora was evaluated by determining the TVC and TLC of the crop and cecum samples of probiotics and conventional fed groups at the 2nd, 4th and 6th week of age. The result revealed competitive antagonism. The result of the study evidenced that probiotic organisms inhibited some nonbeneficial pathogens by occupying intestinal wall space. It has been demonstrated that broilers fed with probiotics had a tendency to display pronounced intestinal histological changes such as active impetus in cell mitosis and increased nuclear size of cells, than the controls. It is obviously found from this research work that probiotics supplementation promoted significant influence on intestinal microbial balance related with pronounced intestinal histological changes.
  B.K. Paul , S.K. Das , S.C. Badhy , M.R. Amin , K.M.R. Amin and S.C. Banik
  To asses the effect of existing and imposed vaccination programme on body weight in broiler under farm condition in Bangladesh an experiment was conducted in the Department of Medicine, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh from August to September 2003. Seven different broiler farms in the Sherpur District were taken dividing the farms into two groups-Group I: for existing vaccination and Group II: for imposed vaccination. From all the farms blood samples were collected before vaccination to check maternal antibody level. Infected as well as dead birds were undergone through necropsy examination properly in spot as well as BLRI, Savar, Dhaka. The present study reveled that the birds survived the diseases lost ranges from 1190-1320g (Group I) than those did not face Gumboro 1585-1620g (Group II). Thus, there is a significant variation in body weight in Gumboro affected broilers due to existing and imposed vaccination programme under farm condition.
  S.K. Das , G.N. Adhikary , M.N. Islam , B.K. Paul and G.G. Das
  To judge the advantages and disadvantages of Artificial Insemination (AI) by raw semen in deshi chicken a test experiment was conducted in Bangladesh Agricultural University (BAU) poultry farm, Mymensingh, Bangladesh. Male birds (RIR) were collected from the BAU poultry farm, whereas the female birds (deshi hens) were purchased from nearby local village market. Both types of birds were kept in individual cage with adlibitum food and water and were given abdominal massage at least for three days (at the same time of the day) prior to AI. Collected semen was inseminated (0.20-0.25 ml/hen) directly by soft dropper into the female genital tract. The result of the present experiment showed that 1-2 females could be covered by semen collected from single ejaculate from one cock. It was also found that very small amount of semen was wastage by container. Thus it can be concluded that AI by raw semen is not profitable (except experimental point of view) until we use semen diluents for commercial purpose.
  S.K. Das
  To determine the effects of feeding on semen production 24 native cocks (Gallus domesticus) were studied under cage method in BAU poultry farm. Among 24 birds, 6 were fed once daily, 6 were fed twice daily, 6 were fed thrice daily and another 6 were fed adlibitumly. Semen was collected by abdominal massage method avoiding any fear and disturbance to the birds. Experiment showed that birds fed once daily produce less amount at semen than the birds fed twice daily, semen of which also less than the birds fed thrice daily and finally the adlibitum group produce the highest amount of semen. Thus the present study revealed that semen production in native cock is positively correlated to feeding. Furthermore, semen production is also related to the age of the cocks.
  M.S. Islam , M.A. Quasem , M.M Uddin , M.A. Reza and S.K. Das
  To study the innervation to the esophagus of Black Bengal goat a research was conducted in the Department of Anatomy and Histology, BAU, Mymensingh-2202, Bangladesh with 12 Black Bengal goats. All specimens were collected from adult Black Bengal goats (over 6 months of age); irrespective of sex. The esophagus of Black Bengal goat was sampled at six sites- Cranial cervical, middle cervical, caudal cervical, at the level of thoracic inlet, at the middle mediastinum and at the level of cardia. The nerves supplying the upper third of cervical esophagus by the pharyngoesophageal branch of vagus. The caudal two-third of cervical esophagus was innervated by the recurrent laryngeal nerve. The thoracic part of the esophagus was supplied by the recurrent laryngeal nerve and the dorsal esophageal branch of the vagus. The dorsal vagal trunk innervated the esophagus from the heart to the cardia.
  S.K. Das , M. Sakakibara , A. Sakurai , J. Bhattacharjee , M.M. Rahman and M.A. Awal
  To observe the effect of environmentally persistent chemical formalin on the cells of male genital system as well as reproduction an experiment was conducted in the Department of Anatomy and Histology, BAU, Mymensingh-2202, Bangladesh. Ten percent commercial formalin was used in 12 prepubertal male Black Bengal goats. At fifteen days after a single exposure of formalin, atrophy of testes was observed for the first time and at thirty days after exposure the mean weight, length and width of testes were significantly decreased compared to those of control group. In histopathological observation, it was found that the peripheral tubules were more affected than the central ones. In heavily affected areas, the seminiferous tubules were collapsed or shrunk. Focal or complete necrosis was also noticed in different regions of treated testes. In addition, increased connective tissues with macrophage infiltration were also observed in the interstitial region. Mark eosinophilic staining was also observed in the treated testicular tissue. The sloughed and necrosed seminiferous tubules were also found indicating cellular degradation caused by formalin. Further study is also needed to elucidate the exact mechanism of cellular degradation caused by such environmentally persistent chemicals both in vivo and in vitro.
  M.A.A. Prodan , M.R. Islam , S.K. Das , M.A. Awal , M.N.H. Siddiqi and M. Kurohmaru
  Histological studies on the arterial wall of main arteries from the ascending aorta to the pectoral and abdomino-inguinal mammary glands of indigenous dogs in different reproductive stages were observed using a light microscope. Based on the histological characteristics and organization of connective tissue fibers and smooth muscle cells in the tunica media, the arterial segments were clearly identified into elastic, transitional and muscular types. Every artery belonging to the three types had different morphological structures at different levels. The artery distant from the heart gradually decreased its elastic lamellae in the tunica media as well as its elasticity and at the periphery of the arterial tree the elastic lamellae were replaced by the smooth muscle cells. The type of the arteries does not depend on the size or diameter of the arteries but depend on the relative distance from the heart. It is assumed that the histological arrangements of tissues in the arterial walls are certainly closely related to the functional demand of the mammary glands.
  A.K. Bhattacharya , S.N. Mandal and S.K. Das
  Concentration of zinc, copper and lead were investigated in the gill, gonads, skin and muscle tissues of six commercially edible fishes from upper stretch of the Ganga River at West Bengal, India. The study area receives a wide variety of wastes generated by municipalities and the industries like paints and pigments, metal processing industries, thermal power plants, electro-processing industries etc. situated on the both side of the river Ganga. Simultaneous analysis of the metals was also carried out in the sediment and aquatic phases to monitor the degree of contamination. Although in the study area, the availability of heavy metals is still below alarming level (the acceptable limit for human consumption of the heavy metals are copper 10 μg g-1, zinc 150 μg g-1 and lead 1.5 μg g-1) but if the present trend continues, the level might get elevated and the consumption of the contaminated fishes might pose severe health hazards to human beings in times to come. The results of this study indicated that the six commercially edible fishes through food, water and sediment leading thereby to bioaccumulation took the metals present in the river ecosystem. The degree of bioaccumulation was directly proportional to the concentration of heavy metals in water phase and found to follow the order pre-monsooncopper>lead.
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