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Articles by Samia Rashid
Total Records ( 3 ) for Samia Rashid
  Samia Rashid , Qaiser Iftikhar , Mohammad Arshad and Javed Iqbal
  Proximate chemical composition, mineral constituents and antibacterial activity of Suaeda fruticosa (Kali Lani) was carried out. Determination of chemical constituents showed the presence of total carbohydrates 0.66 per cent (0.34% reducing and 0.32 % non-reducing), moisture contents 87.9 per cent and ash contents 6.0 per cent. Ether extract of the plant showed acid value 0.56, iodine value 0.02, refractive index 1.36 and pH value 8.0. The percentage of mineral constituents was, sodium 1.40, potassium 0.55, calcium 2.40, magnesium 2.04, carbonates 0.12, bicarbonates 0.85 and chlorides 1.40. Results of antibacterial activity of plant extracts in water, acetone, ethanol and ether against Klebsiella, Staphylococcus and E.Coli indicated that plant possesses potent antibacterial activity. E.Coli showed resistance to the standard antibiotic I. e. Streptomycin while its growth was inhibited by acetone and ether extracts.
  Samia Rashid , Mohammad Ashraf , Shahida Bibi and Rubeen Anjum
  Antibacterial and antifungal activities of some extracts of Launaea nudicaulis and L. resedifolia have been determined by standard methods. Methanol extract of L. nudicaulis and L. resedifolia showed 18.5 and 20.5 mm zones of inhibition against B. subtilis, respectively, as determined by disc diffusion method. Ethanol and DMSO extracts also exhibited antibacterial activities against E. coli and S. aureus but to lower degrees. When these activities were measured by well-method, all these extracts exhibited high activities against K. pneumoniae and low against E. coli compared with the control. Antifungal activity was determined by measuring the linear growth in slants on 4th day of incubation against an Aspergilus spp. Methanolic extracts of L. nudicaulis and L. resedifolia at 0.209 mg/ml levels exhibited 45±6 mm and 37±6 mm linear growth which decreased to 22±5 mm and 28±4 mm, respectively, at 0.838 mg/ml concentration.
  Samia Rashid , Mohammad Ashraf , Rubeen Anjum and Shahida Bibi
  Extracts of Launaea nudicaulis and L. resedifolia were subjected to the demonstration of insecticidal and cytotoxic activities by standard methods; the former was measured against red flour beetle and Sabz Tela and the later by brine-shrimp assay. Methanolic extracts of L. nudicaulis and L. resedifolia at concentration of 0.786 mg/cm2 exhibited 27.5±5 and 45±11 percent insecticidal activity against red flour beetle. L. nudicaulis was also insecticidal against Sabz Tela of cotton plant upto 100% activity. When the cytotoxicity was measured, alcoholic as well as aqueous extracts of both these plants killed larvae at 1mg/ml concentration upto 60-100 percent.
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