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Articles by SAIFULLAH
Total Records ( 7 ) for SAIFULLAH
  Syed Karar Haider and Saifullah
  Different concentrations of acetyl salicylic acid 1, 5 and 10 mM were applied through soil drench and foliar application at weekly intervals starting from emergence of the plants to investigate the effect of ASA on the control or Rhizoctonia solani and on general growth responses. Application of ASA did not influence the development of stem canker. Increasing concentrations of ASA produced reductions in tuber fresh weight and in total and component part dry weights. A concentration of 10 mM increased main stem numbers significantly, although this concentration was some what phytotoxic.
  During survey of Potato cyst nematodes, some cysts were found with one, two and three beautiful spots. Colletrichum coccodes was isolated from spotted cysts. The same symptoms were reproduced when cysts were put on agar containing the fungus. Low temperature scanning electron microscope studies showed disintegration on the cyst wall in a ring.
  Asghar Ali , M. Adil Choudhry , M. Asim Siddique , Saifullah and M.M. Akram
  The comparative yield potential of seven mungbean genotypes namely; NM-92, NM-89, NM-15-11, NM-49-7, NM-22-5-1, 6153 B-20 and 6173 B-10 was studied under field conditions. The yield components like number of pod bearing branches plant–1, number of pods plant–1, number of seeds pod–1 and 100-grain weight differed significantly among all the genotypes. Genotype NM-89 produced maximum grain yield which was, however, statistically similar to those of NM-15-11, NM-22-5-1 and NM-92. Protein contents in grains did not differ significantly among the genotypes.
  Syed Karrar Haider and Saifullah
  Two concentrations of both Salicylic acid (SA) and Acetyl Salicylic acid (ASA) were used to investigate their effect on the growth and yield of potato cv. Home Guard under cool glass house conditions. ASA and SA applications induced toxic effects and negligible agronomic benefits were obtained.
  Asghar Ali , M.Adil Choudhry , M. Asghar Malik , Rashid Ahmad and Saifullah
  Response of two wheat cultivars namely Inqalab-91 and Punjab-96 to nitrogen levels of 0, 50, 100 and 150 kg ha–1 was studied under field conditions. The cultivar Inqalab-91 gave significantly higher grain yield than cultivar Punjab-96 due to more spike length, number of grains spike–1 and 1000-grain weight. Yield and yield components were also influenced significantly by nitrogen levels. The application of 150 kg N ha–1 produced maximum grain yield of 5.44 t ha–1 which was, however, statistically similar to that of 100 kg N ha–1. The increase in grain yield with nitrogen application was related to higher number of tillers m–2, spike length, number of grains spike–1 and 1000-grain weight.
  Raw sewage is widely used on agricultural soils in urban areas of developing countries to meet water shortages. Although it is a good source of plant nutrients, such sewage also increases the heavy metal load to soils, which may impact the food chain. Management options for sewage contaminated soils includes addition of nontoxic compounds such as lime, calcium sulfate and organic matter, which form insoluble metal complexes, thus reducing metal phytoavailability to plants. In this paper we review the variation in irrigation quality of sewage at different sites and its impact on the quality of soils and vegetables. Although quality of sewage was highly variable at source, yet the effluent from food industries was relatively safe for irrigation. In comparison effluent samples collected from textile, dyeing, calendaring, steel industry, hospitals and clinical laboratories, foundries and tanneries were hazardous with respect to soluble salts, sodium adsorption ratio and heavy metals like zinc, copper, iron, manganese, nickel, cobalt and cadmium. The sewage quality in main drains was better than that at the industry outlet, but was still not safe for irrigation. In general, higher accumulation of metals in fruits and vegetable roots was recorded compared to that in plant leaves. Edible parts of vegetables (fruits and/or leaves) accumulated metals more than the permissible limits despite the soils contained ammonium bicarbonate diethylenetriaminepentaacetic acid extractable metals within a safe range. In either case further scientific investigations are needed to ensure safe management strategies. Cadmium appeared to be the most threatening metal especially in leafy vegetables. It is advisable to avoid leafy vegetables cultivation in sewage irrigated areas everywhere to restrict its entry into food chain.
  Biotransformation of dydrogesterone (1) by using cell suspension cultures of Azadirachta indica yielded a metabolite 20R-hydroxy-9β,10α-pregna-4,6-diene-3-one (2). The structure of this compound was deduced on the basis of various spectroscopic techniques.
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