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Browsing Issue 04 by Title

Browsing Issue 04 by Title

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  • Quality Assessment of Potable Water of Khairpur City 
    TAJNEES PIRZADA; MIR MUNSIF TALPUR; AHMED DIN RAJPER; MUHAMMAD RAZASHAH; SHAHID NASEEM (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-08-20)
    This study is conducted to analyze the quality of potable water resources available to the inhabitants of Khairpur city. Eight sites of ground water and six sites of surface water are selected along the study area. The ...
  • REMOVAL OF MUREXIDE (DYE) FROM AQUEOUS MEDIA USING RICE HUSK AS AN ADSORBENT 
    Rabia Rehman; Jamil Anwar; Tariq Mahmud; Muhammad Salman; Umer Shafique; Waheed-Uz-Zaman (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-08-20)
    The use of low-cost and ecofriendly adsorbent was investigated as an ideal alternative to the current expensive methods of removing dyes from wastewater. Rice husk was used as an adsorbent for the removal of Murexide from ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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] ...

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