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Articles by P. Biswas
Total Records ( 2 ) for P. Biswas
  M.K. Mondal , S. Panda and P. Biswas
  A six wk feeding experiment was conducted with d-old four hundred broiler chicks (Ven Cobb) to determine the effects of microbial phytase (Allzyme) supplementation in soybean meal based broiler diet containing low phosphorous. These birds were randomly divided into four dietary treatment groups of 100 broilers each. Each treatment group was further sub-divided into five replicates of 25 broilers per replicate. The treatments groups were control; low phosphorus; low phosphorus plus 250 PU phytase/kg diet; low phosphorus plus 500 PU phytase/kg diet. There were significant effects of dietary treatments on body weight, body weight gain, feed intake and feed conversion ratio at 0 to 42 days. The body weight and the body weight gain of the broilers fed the control and low phosphorus plus phytase diet were heavier (p<0.05) than other treatment. Feed conversion ratio of broiler fed on low phosphorus plus phytase 500 PU/kg was significantly better (p<0.05) than that of broilers fed on low phosphorus phytase supplementation had no effect on broiler mortality. Concentration of blood metabolites were unaffected (p>0.05) by the dietary treatments. Supplemental phytase (500 PU/kg) maintained the same plasma concentration of Ca and P as found in control whereas the concentration of Fe. Mn and Zn was unaffected by the dietary treatments. The percentage of tibia ash, Ca and phosphorus and retention of Ca and P was significantly increased by the addition of microbial phytase to low phosphorus diet. This study demonstrates that microbial phytase can compensate the untoward effect of low phosphorus levels in the soybean meal based broiler diet.
  S.Z. Raihan , M.M. Monir , P. Biswas , S.K. Biswas , A. Chowdhury , J. Das and A.C. Das
  Dalbergia spinosa Roxb. (Family: Fabaceae) has many traditional uses in Bangladesh. The crude methanol extract of the stem barks of D. spinosa Roxb. was investigated for possible antinociceptive activity using acetic acid induced writhing model in mice. Phytochemical analysis was also performed using standard procedures to detect the presence of phytochemicals in the crude plant extract. The study results showed 37.20% inhibition of writhings in the tested mice when methanol extracts were given intraperitoneally (i.p.) at the dose of 250 mg extract kg-1 b.wt. The maximum inhibition (40.01%) of nociception effect was achieved at 500 mg extract kg-1 b.wt., i.p. which was also compared with the antinociceptive activity of the standard drug, diclofenac sodium at the dose of 25 mg extract kg-1 b.wt. which produced 68.37% inhibition of nociception effect. The inhibition of writhings was calculated in respective to control group and it was found that p-values (<0.0001) calculated by student’s t-test were statistically significant. However, the phytochemical screening revealed the presence of alkaloid, steroid, flavonoid, tannin, reducing sugar and gum. Finally, it can be concluded that crude methanol extracts of D. spinosa stem barks contain biologically active phytoconstituents exhibiting significant dose-dependent antinociceptive activity in the mice model used. Thus, it is recommended to isolate and characterize the compounds for the development of new analgesics.
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