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Articles by Zahida Parveen
Total Records ( 2 ) for Zahida Parveen
  Zahida Parveen , Yulin Deng , Muhammad Khalid Saeed , Rongji Dai , Waqar Ahmad , Yuhong Yu and Tahmina Yasmeen
  Astragalin, one of the flavonoid extracted from plants is increasingly in demand in food and pharmaceutical industries due to its various biological and physiological activities including antioxidation, antiallergy, anti-inflammation and anti-hepatoptoxic. The whole plant of Thesium chinense Turcz is a major source of astragalin. This study developed a low-cost process encompassing the efficient extraction, fractionation, isolation and recrystallization to obtain high-purity astragalin from Thesium chinense and it could improve the economic utilization of this plant. In this study plant was extracted with 80% ethanol for 3 h and extract was fractionated on AB-8 (styrene based copolymer) with water, 20, 40 and 80% aqueous ethanol. Astragalin was isolated by silica gel column and purified by recrystalization with methanol. These conditions resulted 90% recovery of Astragalin with 95% purity.
  Asma Nafeesa , Munir Ahmad Sheikh , Ikram-ul-Haq , Amer Jamil and Zahida Parveen
  A total of 60 isolates of Staphylococcus aureus, 30 each from upper respiratory tract as well as from post operative wound infections were subjected to antibiogram studies. Staph. aureus isolates from upper respiratory tract were found 30, 53.33 and 43.33% resistant against ciprofloxacin, amoxycillin and chloramphenicol respectively. A similar pattern of antibiotic resistance was observed against the bacterial isolates from post operative sepsis. Susceptibility of ciprofloxacin, amoxycillin and chloramphenicol in such cases was found only to be 43.33, 10 and 3.33% respectively. The high bacterial resistance appears to be due to indiscriminate use of antibiotics.
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