• 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 ...
• Vindoline and its Reactions 

  INAM-UL-HAQUE; HINA SABA (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-12-20)

  Vindoline is a major alkaloid from the leaves of Vinca roseus Linn. (Catharanthus roseus G. Don) Apocynaceae. Chemically vindoline lacks physiological activity alone but is contained as the pentacyclic moiety in the ...
• Synthesis of Substituted Pyrimidin-4(1H)-one (Uracil) Derivatives and Some of Their Reactions 

  MOHAMMAD BARMAKI (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-12-20)

  In this paper I described two practical routes for the synthesis of substituted Uracilderivatives and achieved some of their reactions. In the first synthesis which is based on the condensation reaction of ethyl 2- ...
• Atom Transfer Radical Copolymerization of Phenoxycarbonylmethyl Methacrylate with Methylmethacrylate: Their Monomer Reactivity Ratios and Thermal Stabilities 

  NEVİN ÇANKAYA; KADİR DEMİRELLİ (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-12-20)

  The atom transfer radical polymerization of phenoxycarbonylmethyl methacrylate (PCMMA) and its atom transfer radical copolymerization (ATRP) with methyl methacrylate (MMA) were performed in bulk at 110 °C in the presence ...
• Study of Lead Pollution in Air, Soil and Water Samples of Quetta City 

  MUZAFFAR KHAN; KHAN, GHULAM MUSTAFA; SHER AKBAR; PANEZAI, MUHAMMAD ANWAR; TALAT ZAMIR; ZIA-UL-HAQ (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-12-20)

  This study briefly presents the collected data of lead pollution in the environment of Quetta City in Balochistan, Pakistan .The samples were collected from different sites. The analysis of lead was carried out in underground ...
• The Effect of Cadmium and Chromium Concentration, on Biological Activity of Marsilea minuta 

  ZAHID HUSSAIN; KHAN, KHALID MOHAMMED; SHAHNAZ PERVEEN; NIDA AMBREEN; WAJID UR RAHMAN; ATA ULLAH (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-12-20)

  Antibacterial activity of the Marsilea minuta was investigated that was collected from four different places of the same stream. The activities were correlated with the chromium and cadmium ions contents of the stream. ...
• Assessment of Concentration of Lead, Cadmium, Chromium and Selenium in Blood Serum of Cancer and Diabetic Patients of Pakistan 

  MUHAMMAD SALMAN; RABIA REHMAN; TARIQ MAHMUD; WAHEED-UZ-ZAMAN; UMER SHAFIQUE; JAMIL ANWAR; ALI, SANA ZULFIQAR (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-12-20)

  Heavy metals have specific role in the progression of diseases. The aim of this study was to investigate the level of toxic elements, i.e. lead, cadmium, chromium and selenium in blood serum of type 1 diabetes mellitus and ...
• Evaluation of Antioxidant Potential of Citrus Peel Extracts 

  CHATHA, SHAHZAD ALI SHAHID; ABDULLAH IJAZ HUSSAIN; ASI, MUHAMMAD RAFIQUE; MUDASIR MAJEED; NASIR IQBAL, HAFIZ MUHAMMAD (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-12-20)

  The antioxidant potential of different solvent extracts of three different locally grown citrus varieties; grape fruit, lemon and mussambi, was assessed using some antioxidant assays like estimation of total phenolic ...
• Evaluation of Batch Biosorption of Chromium (VI) from Aqueous Solution by Chemically Modified Polyalthia longifolia Leaves 

  RABIA REHMAN; JAMIL ANWAR; TARIQ MAHMUD; MUHAMMAD SALMAN; MARIA SALEEM (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-12-20)

  Removal of toxic metals from surface water is a significant matter of concern. Biosorption is emerging as an economical and ecofriendly methodology for the removal of toxic chemicals from waste water. Optimization of ...
• Intercomparison Exercises; A Requirement for Accurate and Precise Analytical Data 

  NAILA SIDDIQUE; S. WAHEED (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-12-20)

  External evaluation of laboratory results and procedures can be carried out by participation in intercomparison exercises. The results of the International Atomic Energy Agency - Marine Environmental Laboratory (IAEA-MEL), ...
• Minerals and Nutritional Composition of Camel (Camelus dromedarius) Meat in Pakistan 

  TARIQ MAHMUD; RABIA REHMAN; JAMIL ANWAR; SAKHWAT ALI; AADIL ABBAS; MUHAMMAD SALMAN (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-12-20)

  The quality of camel meat has received little attention so far in Pakistan. It is nutritionally as good as that of the major sources of red or white meat. Camel is a desert animal but is not less than other red meat animals ...
• Effect of Solid Waste on Heavy Metal Composition of Soil and Water at Nathiagali-Abbottabad 

  MUHAMMAD IRSHAD; NOREEN MALIK; TARIQ KHAN; FARIDULLAH (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-12-20)

  This experiment concluded that the waste material produced tangible impacts on soil and water system of Nathiagali. The dumping of waste resulted in a marked increase in the concentration of metals in soils and the measured ...

View more