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Browsing Issue 05 by Title

Browsing Issue 05 by Title

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  • Mechanistic Studies on the Reaction of 0-phthalaldehyde (OPTA) with Urea and its N-alkyl/aryl Derivatives 
    BUSHRA MALIHA; ISHTIAQ HUSSAIN; TARIQ, MUHAMMAD ILYAS; SIDDIQUI, HAMID LATIF (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2009-10-20)
    Urea and its N-alkyl/aryl derivatives react with o-phthalaldehyde (OPTA) to yield blue to purple coloration along-with isoindoline compounds (VII a,b,c) in acidic media. The color is unstable and changes into various shades ...
  • Micellization of Dodecyl Benzenesulfonic Acid and its Interaction with Poly(Ethylene Oxide) Polymer 
    KHAN, MOHAMMAD SALEEM; ZARSHAD ALI (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2009-10-20)
    The interaction between dodecyl benzene sulfonic acid (DBSA) with poly (ethylene oxide) (PEO) has been investigated at 293 K by conductance and surface tension measurements. The effect of concentration on the electrical ...
  • Microwave-assisted Synthesis of Chiral Bibenzimidazoles 
    GANG CHEN; YING TANG; MEI MENG; XUE-FAN GU (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2009-10-20)
    Three chiral bibenzimidazoles were synthesized by condensation of o-phenylenediamine with L-(+)-glutamic acid, L-(+)-aspartic acid and L-(+)-tariaric acid under microwave irradiation, promoted by polyphosphoric acid (PPA). ...
  • Mixed Complex Combinations with a New Schiff Base used as Membranes Ion-Selective for Copper and Nickel Ions; Analytical Applications 
    LIVIU MITU; CRISTIAN TIGAE; CEZAR SPINU; MARIA PLENICEANU (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2009-10-20)
    Four electrodes with liquid membrane, Cu2+-selective and Ni2+-selective, not previously described in the literature, were prepared and characterized. Electrodes I and 2 are based on mixed complexes of Cu(ll) and Ni(ll) ...
  • Nutritive Values of Brassica campestris L. Oil as Affected by Growth Regulator Treatments 
    ASGHARI BANO; NADEEM KHAN; FAIZANULLAH (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2009-10-20)
    The effects of plant growth regulators, viz. Indole acetic acid (IAA), Gibberellic acid (GA) and Abscisic acid (ABA) were studied on fatty acid compositions, glucosinolate content and protein content of Brassica campestris ...
  • Oxidation of CO by 02 over ZnO Studied by FTIR Spectroscopy 
    GHULAM HUSSAIN (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2009-10-20)
    The adsorption of CO at room temperature on finely divided ZnO surfaces, studied by FTIR, shows reversible bands (2250-2050 cm-I) and irreversible absorption bands (1800-600 cm-I ). The irreversible absorption bands (1800-600 ...
  • Phytochemical Studies on Daphne mucronata 
    RASOOL, MUHAMMAD AZAM; IMUHAMMAD IMRAN; HAQ NAWAZ; ABDUL MALIK; KAZMI, SHAHANA UROOJ (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2009-10-20)
    Eleven compounds have been isolated for the first time from Daphne mucronata namely, cinnamic acid (1), 7,8-dimethoxycoumarin (2), 7,8-dihydroxycoumarin (3), lupeol (4), ßamyrin (5), betulin (6), 5,6,7,8,3',4'-hexamethoxyflavone ...
  • Quantification and Diversity in the Black Seeds (Nigella sativa L.) Gene Stock of Pakistan for their Composition of Mineral Nutrients 
    IQBAL, MUHAMMAD SAJJAD; ABDUL GHAFOOR; QURESHI, AFSARI SHARIF (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2009-10-20)
    Nigella sativa (L.) a member of family Ranunculaceae is an annual herbaceous plant indigenous to the Mediterranean region contains more than 100 nutrients and had been used for edible and medicinal purposes in major parts ...
  • Surface Area and Pore Size Distribution of Activated Carbon Produced from Low Cost Precursors 
    SULTAN ALAM; BANGASH, FAZLULLAH KHAN (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2009-10-20)
    Fast growing wood (Paulownia tomentosa-PT, Ailanthus altissima-AA, Salvadora oleoides-SO) and animal bones were utilized for the preparation of activated carbon. The carbon samples were activated by thermal means (400-10000C). ...
  • Synthesis, Leishmanicidal and Enzyme Inhibitory Activities of Quinoline-4-Carboxylic Acids 
    KHAN, KHALID MOHAMMED; SUMAYYA SAIED; MUGHAL, UZMA RASOOL; MARIUM MUNAWAR; SAMREEN; AJMAL KHAN; SHAHNAZ PERVEEN (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2009-10-20)
    A series of quinoline4-carboxylic acids 1-13 wæ synthesized and screened for their leishmanicidal, phosphodiesterase, ß•glucuronidase md urease inhibitory properties. Only compounds 3 and 7 were found to be active against ...

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