• Phytochemical Screening, Total Phenolic Contents and Biological Evaluation of Aerial Parts of Nepeta praetervisa 

  Ghulam Fareed; Nighat Afza; Abdul Malik; Muhammad AliVersiani; Nazia Fareed; Mehreen Lateef; Lubna Iqbal; Uzma Rasheed Mughal; Rasool Bakhsh Tareen (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-10-20)

  This study was designed to explore the phytochemical screening, total phenolic contents, radical scavenging potential and urease inhibitory activities in various fractions of the aerial parts of Nepeta praetervisa. ...
• Synthesis, Characterization and Antimicrobial Activity of Potential Bioactive Organotin(IV) Dithiocarboxylates 

  Syed Mustansar Abbas; Muhammad Sirajuddin; Farooq Ali Shah; Saqib Ali; Sajjad Ahmad (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-10-20)

  A series of newly synthesized organotin(IV) compounds; Me₂SnClL (1) Bu₂SnClL (2), Ph₂SnClL (3), Me₃SnL (4), Ph₃SnL (5) have been derived from the reaction of organotin(IV) chlorides with 4-formylpiperazinium 4-formylpipe ...
• Rivina humilis L: A Potential Antimicrobial and Antioxidant Source 

  Muhammad Ajaib; Annam Zikrea; Khalid Mohammed Khan; Shahnaz Perveen; Shazia Shah; Aneela Karim (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-10-20)

  he antimicrobial and antioxidant activities were carried out on different parts including root, stem, leaf, inflorescence and fruit of plant of Rivina humilis L. It was revealed from the results that the plant extracts ...
• Electrochemical Analysis of Phenols through Charging of Phenol Solutions: A New Approach to Electrochemical Analysis of Phenols 

  Zahid Hussain; Nadia Bashir; Nisar Ahmad; Shahnaz Perveen (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-10-20)

  Five different phenols including catechol, hydroquinone, phenol, phloroglucinol and resorcinol were analyzed using a novel electrochemical method of analysis. This method exploits the properties of the phenols to store ...
• Investigation of a New Spectrophotometric Method for the Analysis of Carbohydrates using glucose as model 

  Zahid Hussain; Khalid Mohammed Khan; Asif Ali; Nasr ullah Shah; Shahnaz Perveen (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-10-20)

  Carbohydrates are biomolecule of significant importance. Its analysis is of prime importance in the clinical investigations, delivery of medicines and quality control operations of food and fuel products. Based on its ...
• Preparation of Bioorganic Rechargeable Battery Using Urea and Chickpea Protein for the Storage and Generation of Electrical Power 

  Zahid Hussain; Khalid Mohammed Khan; Aman Ullah; Akram Shah; Faiq Saeed; Shahnaz Perveen (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-10-20)

  The concept of the organic rechargeable battery is introduced. This battery is using urea as oxidation half and the aqueous extract of chickpea as reduction half due to the reversible electrochemical oxidation and reductions ...
• Synthesis and Crystal Structure of Novel Ethyl 2-chloro-2-(4-(p-tolyl)-1,2,3-thiadiazol-5-yl)acetate 

  Jian-Chang Jin; Zhao-Hui Sun; Ming-Yan Yang; Na-Bo Sun; Jian-Zhong Jin; Hong-Ke Wu (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-10-20)

  A new 1,2,3-thiadiazole compound was synthesized. The crystal structure of the title compound (C₁₃H₁₃ClN₂O₂S, Mr = 296.76) has been determined by single-crystal X-ray diffraction. The crystal is of triclinic, space group ...
• Towards the Synthesis of Batrachotoxin-Formation of Alkynyl Stannanes 

  Aeysha Sultan; Abdul Rauf Raza; Khalid Mohammed Khan (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-10-20)

  Batrachotoxin, isolated from frogs belonging to the genus Phyllobates, is a very potent neurotoxin and a steroidal alkaloid that has been found to block the Na+ channels in nerves and muscles resulting in arrhythmias or ...
• Synthesis and Biological Activities of 3-1-(3-(2-Chloro-3,3,3-trifluoro- prop-1-enyl)-2,2dimethylcyclopropanecarbonyl)-3-Substituted Phenyl thiourea 

  Na-Bo Sun; Chao Lei; Jian-Zhong Jin; Jian-Fen Zhang (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-10-20)

  Some thiourea compounds containing pyrethroids are synthesized. Their structures were confirmed by ¹H-NMR, MS and elemental analysis. The bioassay results indicated that they showed moderate insecticidal and fungicidal activity.
• Asymmetric Epoxidation of Chalcones Promoted by Chiral Schiff Bases and Amino Alcohols 

  Tianhua Shen; Junqi Li; Funa Cui; Xiaocong Zhou; Xiaoli Chen; Qingbao Song (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-10-20)

  A series of chiral ligands were conveniently prepared from L-phenylalanine and characterized. Their application to the asymmetric epoxidation of chalcone was studied. The results demonstrated that 3a were efficient catalysts ...
• Synthesis, Crystal Structure and Biological activity of N-(5-(o-tolyl)-1, 3, 4-thiadiazol-2-yl)cyclopropanecarboxamide 

  Jian-Ying; Na-Bo Sun; Hong-Ke Wu; Xing-Hai Liu (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-10-20)

  A new 1, 3, 4-thiadiazole compound, N-(5-(o-tolyl)-1,3,4-thiadiazol-2-yl) cyclopropanecarboxamide, was synthesized and its structure was confirmed by 1H NMR, MS and HRMS. The single crystal structure of the title compound ...
• New Antibacterial Diazotized Derivatives of 5-Amino Azaheterocycles 

  Humaira Yasmeen Gondal; Muhammad Ali (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-10-20)

  Six new diazotized derivatives of pharmacologically important azaheterocycles (2a-d, 4a-b) were prepared from their corresponding 5-amino benzimidazoles (1a-d) and benzimidazolones (3a-b). All new compounds have been ...
• Synthesis of Antibacterial and Antifungal Activity of Metal (II) Complexes with Schiff Base Derived from 3-Methoxy-5-Bromosalicylaldehyde 

  Emine Gulhan Bakirdere; Erdal Canpolat; Mehmet Kaya (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-10-20)

  In this study, the complexes of Co (II), Ni (II), Cu (II) and Zn (II) with 2-{(E)-[(4-aminophenyl)imino]methyl}-4-bromo-6-methoxyphenol were prepared and characterized by physical, spectral and analytical data. The metal: ...
• Antioxidant Activity of the Various Extracts of Cyclamen graecum Link Tubers and Leaves from Turkey 

  Hulya Metın; Cıgdem Aydın; Cennet Ozay; Ramazan Mammadov (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-10-20)

  IIn this study, antioxidant activities of various solvent extracts (methanol, ethanol, acetone and petroleum benzine) obtained from tubers and leaves of Cyclamen graecum Link (Primulaceae) were determined. Antioxidant ...
• Optimization of Formulation of CMC-Na, Xanthan Gum and Carrageenan Affecting the Physicochemical Properties of Papaya-Wolfberry Beverage using Response Surface Methodology 

  Jie Zeng; Haiyan Gao; Guanglei Li; Panpan Zhong (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-10-20)

  CMC-Na, xanthan gum and carrageenan are widely employed in food industry. They were used for its thickening properties of aqueous solutions or emulsifying abilities. The present work aims to optimize the formula of the ...
• Synthesis, Characterization and Antitumor Activities of 1,1`-Diacetylferrocene Dihydrazone Containing a Salicylaldehyde Moiety and its Complexes with Pd(II) and Pt(II) 

  Wael Hussein Hegazy; Yasair Suliman Al Faiyz (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-10-20)

  A ferrocenyl ligand was prepared from condensation of 1,1`-diacetylferrocene dihydrazone with salicylaldehyde. Ligand forms 1:1 complexes with Pd(II) and Pt(II) in good yield. Characterization of the ligand and complexes ...
• Preparation and Characterization of Magnesium Phthalocyanines Nanoparticles: Effect of Surfactant on the Shape and Size of Nanoparticles 

  Abdullah Mohamed, Asziri; Maha Moteb, Al-Otaibi; Reda Muhammad, El-Shishtawy; Khalid Ahmad, Alamry; Sher Bahadar, Khan (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-10-20)

  Magnesium phthalocyanine nanoparticles (MgPc) were developed in aqueous phase and the effect of anionic, cationic and non-ionic surfactant on the preparation of nanoparticles was evaluated. The sonication time, concentration ...
• Analysis of Samarium and Europium in Wheat by ICP-MS after On-Line Separation and Preconcentration 

  Yong Zhang; Zhihua Ning; Luzhi Sui; Hao Zhong (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-10-20)

  Europium and Samarium in wheat were determined by inductively coupled plasma mass spectrometry (ICP-MS) after flow injection on-line separation and preconcentration with P507 resin micro-column. The enhancement factors of ...
• Molten Salt Synthesis of Iron Oxide Modified Attapulgite for Catalytic Oxidation of Elemental Mercury 

  Yu Lu; Jing Ling, Shao; Hui Cang; Fen Nv Han; Zhi Dong, Chen; Qi Xu (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-10-20)

  IIron oxide modified attapulgite (Fe₂O₃-ATP) catalysts, with special network structure, were prepared by molten salt method, and were applied to investigate Hg⁰ oxidation ability in simulated flue gas from 100 to 260°C. ...

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