Pakistan Science Foundation: Recent submissions

  • Microbial Transformation of Vanillin Isolated from Melia azedarach to Vanillyl Alcohol followed by Protease Inhibition and Antioxidant Activity 
    DURRE SHAHWAR; MUHAMMAD ASAM RAZA; TOQIR ALI; VIQAR UDDIN AHMAD (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-10-20)
    Vanillin (1) was isolated from ethanolic extract of Melia azedarach L. and incubated in the culture of Aspergillus niger GC-4, which resulted in vanillyl alcohol (2). The product was identified by mass, ¹H and ¹³C-NMR ...
  • IONIC LIQUID CATALYZED SYNTHESIS OF 3,4-DIHYDROPYRIMIDIN-2(1H)-ONES UNDER MICROWAVE IRRADIATION 
    QIN WANG; AND WEN PEI (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-12-20)
    An effective synthesis of 3,4-dihydropyrimidin-2(1H)-one derivatives using ionic liquid 1-n-butyl-3-methylimmidazolium hexafluorophosphate ([bmim]PF₆) as the catalyst from aldehydes, 1,3-dicarbonyl compounds and urea ...
  • Catalytic Conversion of Waste Inner Tube Rubber (Isobutylene Isoprene) into Valuable Products 
    FAZAL MABOOD; MOHAMMAD RASUL JAN; JASMIN SHAH; FARAH JABEEN; SULTAN ALAM; MOHAMMAD SADIQ; JAVID HUSSAIN; ZAHID HUSSAIN (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-12-11)
    Waste inner tube rubber (isobutylene isoprene) represents a source of energy and valuable chemical products. Waste inner tube rubbers were pyrolysed catalytically in a batch reactor under atmospheric pressure. Calcium ...
  • A Cystein Protease from Asteraceae (Centaurea Aegialophila) 
    NAZAN DEMİR; HAYRUNNISA NADAROĞLU; MUHARREM TOPAL; YAŞAR DEMİR (Karachi: The Chemical Society Of Pakistan, 2011-10-19)
    Proteases are enzymes that perform very important functions in organisms and are used for a variety of objectives in vitro. In recent years, proteases have been used for clinical, pharmaceutical (alimentary digestion, ...
  • Secondary Metabolites from Caragana ambigua 
    MAJIDA; REHAN KHAN; ITRAT FATIMA; AMAN KARIM; ABDUL MALIK; RASOOL BAKHSH TAREEN (Karachi: The Chemical Society Of Pakistan, 2011-10-18)
    A new naturally occurring pregnane derivative named as ambiguanol (1) has been isolated from ethyl acetate soluble sub-fraction of the ethanolic extract of Caragana ambigua along with E-cinnamic acid (2), β-sitosterol ...
  • Antiviral Activity Evaluation of Pyrazolo[4,3-e][1,2,4]triazines 
    MARIUSZ MOJZYCH (Karachi: The Chemical Society Of Pakistan, 2011-10-17)
    The main purpose of this study is to screen synthesized pyrazolo[4,3- e][1,2,4]triazine derivatives for their antiviral activity against a panel of DNA and RNA viruses. Minimum cytotoxic and minimum virus-inhibitory ...
  • Antifungal Activity of the Pyrolyzate of Glucose, Sucrose and Starch in Comparison to Paper Pyrolyzate 
    ZAHID HUSSAIN; KHALID MOHAMMED KHAN; SHAHNAZ PERVEEN; IFTIKHAR HUSSAIN BUKHARI (Karachi: The Chemical Society Of Pakistan, 2011-10-16)
    Glucose, sucrose, starch and cellulose were pyrolyzed at 300 º C. The antifungal activities of these pyrolyzates were investigated. All of these pyrolyzates were found to be remarkably active against Trychophyton longifusus. ...
  • Improved Synthesis of Ferrocenyl aniline 
    ATAF ALI ALTAF; NASIR KHAN; AMIN BADSHAH; BHAJAN LAL; SHAFIQULLAH; SAEED ANWAR; MUHAMMAD SUBHAN (Karachi: The Chemical Society Of Pakistan, 2011-10-15)
    Comparative synthesis of ferrocenyl aniline from nitro phenyl ferrocene using different reducing agents, like Sn/HCl, Zn/HCl, Pd-charcoal/NH₂-NH₂ and Zn/formic acid, has been studied and found that Zn/formic acid system ...
  • Studies of Antifungal Activity of Forsskalea tenacissima 
    MUHAMMAD QAISAR; VIQAR UDDIN AHMAD; MOHAMMAD NISAR; SYED NAEEMUDDIN GILANI; SAMREEN PERVEZ (Karachi: The Chemical Society Of Pakistan, 2011-10-14)
    Antifungal activity of different extracts from Forsskalea tenacissima prepared by solvent-solvent extraction and vacuum liquid chromatography (VLC) was determined. Extracts were found to be active against Candida albicans, ...
  • Bioassay Directed Isolation Studies on Solanum surrattense 
    EJAZ AHMED; AHSAN SHARIF; HAQ NAWAZ; MUKHTAR-UL-HASSAN; MUHAMMAD AZAM RASOOL; KHADIJA NAFEESA; ROBINA BEGUM; MUHAMMAD ASHRAF; TARIQ MAHMUD (Karachi: The Chemical Society Of Pakistan, 2011-10-13)
    Bioassay directed isolation studies on solanum surrattense have resulted in the isolation of three steroidal alkaloids namely, acetyl-solasodine (1), khasianine (2) and solamargine (3) from the ethyl acetate soluble fraction. ...
  • 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 ...
  • allo-Imperatorin: A Potent Urease Inhibitor from Fresh Unripe Fruits of Aegle marmelos (Rutaceae) 
    ALI, MUHAMMAD SHAIQ; GHAFOOR AHMED; PERVEZ, MUHAMMAD KASHIF; MEHREEN LATEEF; NIGHAT AFZA; LUBNA IQBAL (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-12-20)
    During the search for bioactive constituents from different parts of Aegle marmelos (Rutaceae), the ethanol soluble portion of fresh unripe fruits yielded two known amides named aegeline (1) and 2-O-methyl aegeline (2), ...
  • Comparison of the Catalytic Activity of the Commercially Available Clays for the Conversion of Waste Polyethylene into Fuel Products 
    M. RASUL, JAN; JASMIN SHAH; KHADIM HUSSAIN; SHAHNAZ PERVEEN; KHAN, KHALID MOHAMMED; ZAHID HUSSAIN (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-12-20)
    The use of clays as catalyst for the cracking of polyethylene was investigated and commercially available clays like China clay, Fuller’s earth and French chalk were used to convert polyethylene into fuel oil and fuel gas ...
  • Camel Liver Acid Phosphatases: Purificaion and Properties 
    MEHRIN SHERAZI; RUBINA NAZ; ASMA SAEED; AISHA SIDDIQUA; SHAZIA AMEEN; AHMAD SAEED (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-12-20)
    Three acid phosphatases were identified from the liver of a camel. Of these, two high molecular weight acid phosphatase forms were isolated and purified by successive chromatography on SP-Sephadex C-50, Sephadex G-75, ...
  • Synthesis and Characterizations of New 1,3-Oxazine Derivatives 
    OZTURKCAN, S. ARDA; KADIR TURHAN; ZUHAL TURGUT (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-12-20)
    In this study, Betti's classical procedure, a Mannich-type aminoalkylation reaction of 2- naphthol with various aldehydes was applied in the presence of ammonia and then 1,3disubstituted-2,3-dihydro-1H-naphtoxazines were ...
  • Molecular Characterization of Hemolysin Gene from a Pakistani Clinical Isolate of Vibrio cholerae 
    ASIF IQBAL; AZIM, MUHAMMAD KAMRAN (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-12-20)
    Hemolysins comprise an important bacterial exotoxin family. The genome of Vibrio cholerae genome contains several hemolysin genes including thermolabile hemolysin which is thought to be the key virulence factor beside ...
  • Chitosan Nanoparticles as Drug Delivery Carriers for Biomedical Engineering 
    LU-E SHI; GUO, XIAO-FENG; FANG, XIU-JUAN; ZHAO, LI-MING; LIANG, YING XING; MIN CHEN; TANG, ZHEN-XING; ZHU, DONG-SHENG (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-12-20)
    Chitosan is a rather abundant material, which has been widely used in food industrial and bioengieering aspects, including in encapsulating active food ingredients, in enzyme immobilization, and as a carrier for drug ...
  • Advances in the Development of Methane Bromination 
    HAROON UR RASHID; KAICHAO YU; JINLAN ZHOU (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-12-20)
    The bromination reactions of Methane were studied and majority of the work done so far was outlined, as these reactions have gained immense importance for years in the industrial sector. Thermodynamically, Bromine (Br) is ...
  • Synthesis of Unsymmetrical 1, 4-Dihydropyridine Derivatives in Ionic Liquid and Inference on the Formation Mechanism of Furopyridines 
    JIAN ZHANG; JIN, LONG FEI (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-12-20)
    Aromatic aldehydes, methyl acetoacetate, ethyl acetoacetate, ammonium acetate, ethyl 4-chloroacetoacetate as materials, eight unsymmetrical 1, 4-dihydropyridine derivatives were synthesized in ionic liquid [Bmim]OH in short ...
  • INFLUENCE OF TERRAIN ON PHENOLIC COMPOUNDS AND ANTIOXIDANT ACTIVITIES OF CABERNET SAUVIGNON WINES IN LOESS PLATEAU REGION OF CHINA 
    Bao Jiang; Zhang, Zhen-Wen; Zhang, Xiao-Zuhan (Karachi: Journal of the Chemical Society Of Pakistan., 2011-12-20)
    Two vineyards with different terrains (site A: 1280 m versus site B: 909 m) in Xiangning County of Shanxi Province located in Loess Plateau region were chosen to study phenolic compounds and antioxidant activities of ...

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