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Browsing Issue 04 by Issue Date

Browsing Issue 04 by Issue Date

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  • Mercury Concentration in Vegetables of Pakistan Irrigated by Different Water Sources 
    QAMAR SHAHEEN; ZAID MAHMOOD; MUHAMMAD IMRAN; SYEDA ROBINA, GILLANI; ILYAS AHMED, FARIDI (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-08-20)
    Mercury levels were determined in twenty samples of each vegetable i.e., Spinach (Spinacia oleracea), Lettuce (Lactuca sativa), Carrot (Daucus cariota), Capsicum (Capsicum fistulosus), Sweet pea (Lathyrus Odoratus), Potato ...
  • Stabilization of Hydrogen Peroxide used as Oxidizing Agent in the In-situ Leaching of Uranium from Arkosic Sandstone 
    YAHYA KHAN; ABBAS KHAN; SYED SAKHAWAT, SHAH; GULZAR HAMID; GULRAIZ FATIMA; MUHAMMAD SIDDIQ (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-08-20)
    H2O2 was used as oxidizing agent of the insoluble tetravalent uranium into the soluble hexavalent state along with NH4HCO3 as complexing agent in tap water solvent. The study was conducted to look at the possibility of ...
  • Extraction-Spectrophotometric Determination OF Cadmium(II) by High Molecular Weight Amine. Application to Industrial Effluents 
    HAJRA MASOOD; M. ISHAQ Ali, KHAN; SHIREEN TAJ (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-08-20)
    An investigation of the complex formation between Cadmium(II) and Potassium iodide in Sulphuric acid solution has been carried out and its extractability by high molecular weight tertiary amine (HMWA) in organic solvent ...
  • Comparative Studies of Heavy Metals in Wheat Growing in Different Environmental Conditions 
    IQBAL HUSSAIN; MURAD ALI, KHAN; JAWAD ALI (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-08-20)
    In the present investigations, we screened wheat crops, collected from different areas of Peshawar and found that the level of heavy metals like Zn, Cu, Cr, Mn Cd, Ni, Pb and Fe in crop increases parallel to the extent of ...
  • Antibactericidal Effect of Some Substituted-1, 2, 4-Triazole Derivatives 
    SINGH, RAM JANAM (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-08-20)
    The syntheses of a series of some substituted-1, 2, 4-triazole derivatives are described. The reaction of sodium salt of α-sulphonated of stearic acid hydrazide (1) with carbon disulphide in alcoholic KOH yielded the ...
  • Analysis of Heavy Metals in Selected Medicinal Plants from Dir, Swat and Peshawar Districts of Khyber Pakhtunkhwa 
    IQBALHUSSAIN; MUNEEB UR REHMAN, KHATTAK; FARHAT ALI, KHAN; INAYAT UR REHMAN; FARMAN ULLAH, KHAN; FARID ULLAH, KHAN (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-08-20)
    Essential and non-essential heavy metals like Manganese, Zinc, Iron, Nickel, Copper, Chromium, Lead and Cadmium were analyzed quantitatively in selected medicinal plants including, Acorus calamus, Artemisia annua, Chenopodium ...
  • FLOW INJECTION METHODS FOR THE DETERMINATION OF Α-TOCOPHEROL WITH SPECTROPHOTOMETRIC DETECTION 
    Lubna Rishi; Saima Jadoon; Amir Waseem; Mohammad Yaqoob; Abdul Nabi (Karachi: Journal of the Chemical Society Of Pakistan., 2011-08-20)
    The present paper describes flow injection procedures for α-tocopherol determination in pharmaceuticals and infant milk powder based on spectrophotometric detection. These two procedures are based on the reduction of ...
  • Studies on Contamination Level of Aflatoxins in Pakistani Rice 
    ARSHAD HUSSAIN; JAVED ALI; SHAFQATULLAH (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-08-20)
    Aflatoxins (AF) are highly toxic and carcinogenic secondary fungal metabolites and have been detected in various food commodities including cereals. Rice samples collected during 2008–2009 were analyzed for aflatoxin ...
  • THEORETICAL STUDIES ON MEMBRANE-BASED GAS SEPARATION USING COMPUTATIONAL FLUID DYNAMICS (CFD) OF MASS TRANSFER 
    Sohrabi, Mahmoud Reza; Azam Marjani; Sadegh Moradi; Mehran Davallo; Saeed Shirazian (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-08-20)
    A 2D mass transfer model was developed to study carbon dioxide removal by absorption in membrane contactors. The model predicts the steady state absorbent and carbon dioxide concentrations in the membrane by solving the ...
  • INFLUENCE OF OPERATING CONDITIONS ON THE REMOVAL OF BRILLIANT VITAL RED DYE FROM AQUEOUS MEDIA BY BIOSORPTION USING RICE HUSK 
    Rabia Rehman; Jamil Anwar; Tariq Mahmud; Muhmmad Salman; Umer Shafique (Karachi: Journal of the Chemical Society Of Pakistan., 2011-08-20)
    Biosorption is emerging as an economical and ecofriendly methodology for the removal of hazardous and toxic chemicals from waste water. The operating conditions have a great influence on the efficiency of this process. ...
  • COMPARATIVE STUDIES FOR THE ADSORPTION OF REMAZOL BLUE ON RICE HUSK, SAW DUST AND CHARCOAL 
    Hafiz Badaruddin Ahmad; Muhammad Aleem; Tahir Anwar; Muhammad Naeem Ashiq; Muhammad Yousaf (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-08-20)
    Rice husk and saw dust are attempted as alternate adsorbents to charcoal for the removal of reactive dye, namely remazol brilliant blue from aqueous media. The adsorption of remazol brilliant blue has been studied onto ...
  • Lignonsulfonate-phenolformaldehyrde Adhesive: A Potenstial Binder for Wood Panel Industries 
    TASLEEM AKHTAR; GHOSIA LUTFULLAH; ZAHOORULLAH (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-08-20)
    Spent sulfite liquor (SSL) was obtained from a paper mill based on grassy pulp material (bagasse, kaigrass and wheat straws). Lignosulfonate (LS) was isolated from SSL by polymerization reaction, initiated with concentrated ...
  • Voltammetry of Nitrobenzene at Bare and DODAC Coated Pt 
    INAM-UL-HAQUE; MUQADDAS TARIQ (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-08-20)
    The reductive electrochemistry of nitrobenzene at one concentration was examined 1:1 water-propanol mixture at bare and DODAC covered platinum semi-micro electrodes using cyclic voltammetry. Generally it is believed [1-9] ...
  • SYNTHESIS OF TRIMETHLOL MELAMINE TEXTILE FIXER 
    Khalid Pervez, Bhatti; Muhammad Zuber (HEJ Research Institute of Chemistry, University of Karachi, Karachi, 2011-08-20)
    The synthesis of Trimethylol Melamine (TMM) precondensate was carried out by the controlled reaction of formaldehyde with melamine, which belonging to class of partially methylolated thermosetting resins. The product was ...
  • SYNTHESIS AND CHARACTERIZATION OF PU-SI NANOHYBRID: INFLUENCE OF SILICA ON PROPERTIES OF UV-CURABLE POLYURETHANE ACRYLATE 
    Eui Sung, Jang; Sher Bahadar, Khan; Joonsuk Choi; Jonchul Seo; Haksoo Han (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-08-20)
    UV-curable polyurethane acrylate-silica nanohybrid has been prepared by incorporating 1% of silica precursors into polyurethane acrylate (PU) polymer matrix using a sol-gel technique and were characterized by X-ray diffraction ...
  • HOMOLOGY MODELING OF RING NECKED PHEASANT (PHASIANUS COLCHICUS, GALLIFORMES) MAJOR HEMOGLOBIN COMPONENT (HBA) 
    Roshan Ali; Ghosia Lutfullah; Zahid Khan; Ashfaq Ahmad (HEJ Research Institute of Chemistry, University of Karachi, Karachi, 2011-08-20)
    Birds have a specialized system of respiration. Their hemoglobin has been adapted to a vast variety of environmental conditions. To understand their specialized mechanism of respiration we need to understand the three ...
  • SYNTHESIS AND THERMAL STUDIES OF SOME EPOXY SYSTEMS CURED WITH AROMATIC DIAMINES 
    Naila Khalid; Muhammad Saif Ullah, Khan; Humaira Masood, Siddiqui; Zareen Akhtar; Naseer Iqbal (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-08-20)
    Some aromatic diamines having flexible ether linkages with variable aliphatic and aromatic character were synthesized via Williamson’s method and used as curing agents in their solution phase and/or molten state for a ...
  • FACILE SYNTHESES OF BIOACTIVE 5-ARYLIDENETHIOBARBITURIC ACIDS 
    Ahsan Sharif; Ejaz Ahmad; Munawar Ali Munawar; Shamsa Jabeen; Misbah-ul-Ain, Khan; Robina Begum; Aleeza Farrukh; Muhammad Ashraf; Shafia Arshad; Nighat Afza (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-08-20)
    A simple and green chemistry route for the preparation of 5- arylidenethiobarbituric acids has been developed by Knoevenagel condensation of thiobarbituric acid with different aromatic and heteroaromatic aldehydes using ...
  • Characterization of the Immunodominant Regions within gp41 of env Gene of HIV in Pakistan 
    LUBNA NISAR; MUHAMMAD IMRAN, QADIR; TEHZEEB-UL-NISA; SALMAN AKBAR, MALIK; NADIA TABASSUM (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-08-20)
    Objective of the present study was to characterize the immunodominant sequences of gp41 in HIV strain in Pakistani population so that vaccine may be prepared based upon these regions.A total of 25 specimens were collected ...
  • HIGHLY SOLUBLE POLYOXYETHYLENE-PERYLENE DIIMIDE: OPTICAL, ELECTROCHEMICAL AND PHOTOVOLTAIC STUDIES 
    O. Hakli Birel; Ceylan Zafar; Haluk Dinclap; Banu Aydin; Mustafa Can (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-08-20)
    The synthesis and optical properties of a new dye molecule [PERKAT] were reported. The molecular structure of PERKAT was characterized by FT-IR and ¹H NMR. Optical properties of PERKAT were investigated by UV-Vis absorption, ...

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