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Articles by Rizwana Aleem Qureshi
Total Records ( 4 ) for Rizwana Aleem Qureshi
  Rizwana Aleem Qureshi , Saleem Ahmad and A.G. Khan
  Hierarchical cluster analysis of 23 species of Saussurea DC. (Compositae) was carried out on the basis of morphological characters of the species. The study was carried out mainly in Pakistan Museum of Natural History, Garden Avenue, Islamabad. Herbarium specimens of the Saussurea DC. species present in Herbaria of Pakistan Museum of Natural History (PMNH), the Herbaria of Quaid-i-Azam University, Islamabad (ISL), National Agricultural Research Centre, Islamabad (RAW) and University of Karachi (KUH) were examined. Specimens of the genus also were borrowed from Royal Botanic Gardens, Edinburgh (E) and Natural History Museum, Paris (P). Thirty five characters were studied that included both quantitative and qualitative characters. The latter were converted into integers by coding. A total of 83 character states were obtained. The data matrix was used to get dissimilarity matrix of the species by using the software SPSS. A dendrogram was produced that showed the grouping of the species on the basis of decreasing dissimilarity. The groupings corresponded reasonably well with the subgeneric division of the species.
  Zaheer Yousaf , Ghulam Jilani , Rizwana Aleem Qureshi and Abdul Ghani Awan
  Effect of Effective Microorganisms is seen on groundnut growth. EM is applied on two varieties (V1 =1 C G -2261 and V2 = 1CGV-86550) in three treatments. These three treatments are T1 = control, T2 = seed inoculation and T3 = seed inoculation with EM EM spray , Treatment 13 showed more growth than T2 and T1 because in T3, EM is applied in the form of seed inoculation as well as EM spray on ground. So, growth can be increased by the application of more EM concentration,
  Ghulam Abbas , Muhammad Yousaf and Rizwana Aleem Qureshi
  The present study has been conducted to determine the water quality and estimation of heavy metals of Fim Kassar Nallah. The water quality parameter including Hardness, Alkalinity, Total Suspended Solids and pH. The water samples were collected from the selected site for the period of six month from January to June 2005 on monthly basis. The data indicates that the amount of total suspended solids and electrical conductivity is not suitable for aquatic life. The values of pH were found more or less same during the six months. The values of total suspended solid were found to be higher during the month of June while there is no significance difference could be found between dissolved oxygen. The heavy metals including Copper, Zinc, Lead and Cadmium were tested by using Atomic Absorption Spectrophotometer. The data show that there is no significance difference among the concentration of heavy metals. The level of Copper and Zinc were found to be tolerable range which is 2 and 5 mg L-1 respectively, while the values of Cadmium and Lead were found higher than tolerable range for aquatic life which were 0.005 and 0.015 mg L-1, respectively.
  Muhammad Asad Ghufran , Rizwana Aleem Qureshi , Aniqa Batool , Tamara P. Kondratyuk , Jacquelyn M. Guilford , Laura E. Marler , Leng Chee Chang and John M. Pezzuto
  The western Himalayas in the northern areas of Pakistan have significant potential for ethnomedicinal research. In the current study, indigenous informants were interviewed using open-ended questionnaires and a free-listing of knowledge related to native medicinal plants. Information patterns indicated that over 100 local plant species were in frequent medicinal use for a variety of conditions, including inflammation and cancer. Several field surveys were conducted in community forests and meadows, with the aim of exploration, collection, taxonomic identification, and finally, in vitro analysis. Organic extracts of eight species were tested for inhibition of nuclear factor-kappaB (NF-κB), activation of retinoic acid X receptor alpha (RXR), induction of quinone reductase (QR), and inhibition of aromatase, along with assessment of cytotoxicity with four human cancer cell lines. Mellia azedarach, Ajuga bractiosa, Figonia cretica and Swertia chirata inhibited both tetradecanoylphorbol-13-acetate (TPA) and tumor necrosis factor (TNF) activated NF-κB activity, whereas Silybum merianum and Rumex dentatus were only active against TNF activation. The lowest IC50 values for inhibition of TPA activated NF-κB activity were 0.41 and 0.44μg/mL for A. bractiosa and S. chirata, respectively. Extracts from three plant species, A. bractiosa, R. dentatus and R. hastaus, were active in the RXR assay. Results from the QR assay showed five active samples (with induction ratios >2) belonging to four species: A. bractiosa, R. dentatus, S. merianum and S. chirata. Most of the plant extracts were not cytotoxic (IC50 values >20μg/mL) with HepG2, MCF7, LNCaP and LU cell lines. Only two plants, R. dentatus and R. hastaus, demonstrated moderate cytotoxic responses (IC50 values 5-15μg/mL) with HepG2, MCF7 or LNCaP cells. None of the plant extracts was found to inhibit aromatase activity. Based on these data, it may be suggested that the plants under investigation contain potential chemopreventive compounds. Additional testing is required. However, the positive responses observed in these bioassays illustrate the high potential of local medicinal plants.
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