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Articles by M. Helal U. Biswas
Total Records ( 3 ) for M. Helal U. Biswas
  Golam Sadik , M. A. Gafur , M. Shah Alam Bhuiyan , A. H. M. Khurshid Alam , M. Helal U. Biswas , Parvez Hassan , Abdul Mannan , M. Omar Faruk Khan and A. K. A. Chowdhury
  The ethanolic extract of Pergularia daemia and its steroidal fraction were studied for antifertility activity. Both the ethanol extract and the steroidal fraction showed significant antifertility activity in the pre-implantation stage in female mice. The ethanol extract also showed late abortifacient activity
  Anwarul Islam , Abu Sayeed , Md. Anwar-Ul Islam , G. R. M. Astaq Mohal Khan , M. Helal U. Biswas and M. Shah Alam Bhuiyan
  The research work was conducted to investigate the antimicrobial and cytotoxic evaluation of a flavonone. The flavonone, 5-methoxy-7-hydroxy flavonone (1), has been isolated from the leaves extract of Zanthoxylum budrunga and its structure was established on the basis of structural evidence. This is the first report of its occurrence from the plant. The compound (1) showed significant antimicrobial activity against a number of pathogenic bacteria and fungi. The minimum inhibitory concentration (MIC) of the compound (1) was found to be 16μg ml‾1 against Staphylococcus aureus. The compound showed prominent cytotoxic activity the LC50 and LC90 values of the compound (1) were found to be 16.24 and 56.56μg ml‾1, respectively.
  M. Motiur Rahman , Mir Imam Ibne Wahed , M. Helal U. Biswas , Md. GolamSadik and M. Ekramul Haque
  The research work was conducted to investigated the in vitro antibacterial activity of the compound isolated from Trapa bispinosa. Antibacterial activity of the compounds was observed against fifteen pathogenic organisms (both Gram positive and Gram negative Bacteria) by disc diffusion method. Compound MTC-4 isolated from chloroform extract showed significant in vitro antibacterial activity against almost all of the test organisms but maximum activity showed against Bacillus subtilis and shigella  dysenteriae and produced zone of inhibition in between 12 to 15mm. While the compound MTE-1 showed moderate activity (08 to 12mm) against most of the test organisms. The other two compounds MTC-3 and MTC-5 were found comparatively less active. The MIC values of the compounds were also determined against two test organisms Bacillus subtilis and Shigella dysenteriae. The values were found to be between 8 to 128μg ml‾1. Thus MTC-4 possesses strong antibacterial activity and suggested its therapeutic use as an antimicrobial agent.
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