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Browsing Issue 02 by Issue Date

Browsing Issue 02 by Issue Date

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  • Isomerization of 3,4-Dichloro-1-butene into 1,4-Dichloro-2-butene by Heterogeneous Catalysis 
    NARGES SAMADANI LANGEROODI (HEJ Research Institute of Chemistry, University of Karachi, Karachi, 2010-04-01)
    The isomerization of 3,4-dichloro-1-butene into 1,4-dichloro-2-butene was investigated by gas-liquid chromatography in the temperature range of 60-90 ºC. Fe2₂O₃/TiO₂ was used as a catalyst. Fe₂O₃/TiO₂ solid acid catalyst ...
  • Phosphorus Adsorption Parameters in Relation to Soil Characteristics 
    AYAZ MEHMOOD; MOHAMMAD SALEEM AKHTAR; RIFAT HAYAT; MEHRUINSA MEMON (HEJ Research Institute of Chemistry, University of Karachi, Karachi, 2010-04-02)
    Understanding of soil phosphorus (P) adsorption chemistry is essential for evolving best fertilizer management practices aimed at enhancing fertilizer P use efficiency and environment quality. Soil chemical parameters which ...
  • 2,7-DICHLOROFLUORESCEIN: A SUITABLE COMPLEXING AGENT FOR THE SPECTROPHOTOMETRIC DETERMINATION OF OFLOXACIN IN PURE AND PHARMACEUTICAL DOSAGE FORMS 
    SYED HASNAIN ALI; AZIZ UR REHMAN; MUHAMMAD JAHANGIR; SABAHAT ZAHRA SIDDIQUI; MUHAMMAD ASHFAQ; MUHAMMAD ZAHID QURESHI; MUHAMMAD ATHAR ABBASI; VIQAR UDDIN AHMAD (HEJ Research Institute of Chemistry, University of Karachi, Karachi, 2010-04-02)
    Ofloxacin is a broad spectrum antibiotic effective against many Gram positive and Gram negative bacteria as well as for some key anaerobes. Ofloxacin was reacted with 2,7-dichloroflourescein in an acidified medium at room ...
  • Conversion of Low Density Polyethylene into Fuel Products Using Gachi Clay as Catalyst 
    ZAHID HUSSAIN; KHALID MOHAMMED KHAN; MUHAMMAD RASUL JAN; JASMIN SHAH (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-04-02)
    The use of Gachi clay as catalyst for the cracking of polyethylene was investigated. The yield of reaction was determined by the relative amounts of oil, wax and gas produced during the process. All the fractions were found ...
  • Characteristic Study of Assimilable Organic Carbon (AOC) Formation Potential in Drinking Water 
    JI HOON KIM; YOUNG JU KIM; DAE SUNG LEE; AHIR IMRAN QURESHI (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-04-03)
    Characteristic study of assimilable organic carbon formation potential (AOCFP) at different reaction conditions of ozonation using model raw water containing humic substances and natural source drinking water was conducted. ...
  • A Model for Making Field-Based Nitrogen Recommendations For Winter Wheat in Western Oregon 
    DOST MOHAMMAD BALOCH; MAQSOOD AHMED KHAN; EHSANULLAH KAKAR; MOHAMMAD AYAZ KHAN MALG HANI (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-04-04)
    A model based on early spring soil and tissue analysis was developed and evaluated for predicting the need for additional nitrogen (N) fertilizer on winter wheat. To develop the model, On-farm trials were established over ...
  • Lightscattering and Viscosities Measurements of Dilute Solutions of Some Schiff Base Polymers 
    ABDUL HAMID CHANNAR; KHALIDA PARVEEN MAHAR; MUHAMMAD YAR KHUHAWAR; SUBHAN MAJIDANO; MUHAMMAD SALEEM KHAN (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-04-05)
    Three Schiff base polymers polymethylene-bis(salicylaldehyde)tetramethylethlene-diimine (PMSATen), polymethylene-bis(salicylaldehyde)meso-stillbenediimine(meso-PMSAS) and poly-methylene-bis(2-hydroxyacetophenone)1,2-prop ...
  • Acidic Surface Functional Groups and Mineral Elements in Lakra Coal (Sindh, Pakistan) 
    KHALID SATED; MUHAMMAD ISHAQ; IMTIAZ AHMAD; MUHAMMAD SHAKIRULLAH; SAJJAD HAIDER (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-04-06)
    Surface acidity of virgin coal (Lakra Sindh, Pakistan) and variously extracted/leached coal samples leached with HNO₃, NaOH, and KMnO₄, were investigated by aqueous potentiometric titration employing KOH as a titrant. The ...
  • Effect of Molecular Mass of Polyethylene oxide over its Aggregation Behavior 
    ABDUR RAUF; MUSA KALEEM BALOCH; GULREZ FATIMA DURRANI (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-04-07)
    Samples of polyethylene oxide having different molecular mass (35, 12, 6 Kg/mol) are investigated with reference to characteristic concentration (CC), critical aggregation concentration (CAC) and hydrodynamic radius (RH), ...
  • HPLC Determination of Putrescine and Cadaverine in Serum of Cancer Patients Using Acetylacetone as Derivatizing Reagent 
    MUHAMMAD YAR KHUHAWAR; ROSHAN ALI GILAL; FAQEER MAHBOOB ALI RIND; ABDUL HAKEEM MEMON; MUHAMMAD USMAN MEMON (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-04-09)
    Liquid chromatographic procedure has been developed for the determination of putrescine (Put) and cadaverine (Cad) after derivatization with acetylacetone in aqueous-methanolic solution at pH 8.2. The derivatives were ...
  • Drug Release Kinetics and Stability Studies of Tablets of Tramadol HCl Microspheres 
    MUHAMMAD NAEEM AAMIR; MAHMOOD AHMAD; NAVEED AKHTAR; GHULAM MURTAZA; MUHAMMAD ASADULLAH (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-04-10)
    The objectives of study were the development of new formulations of Tramadol HCl (TmH) microspheres and their evaluation primarily for kinetics and stability. Microspheres of different polymer concentration M₁ (1:1), ...
  • Antibacterial Compounds and other Constituents of Evernia divaricata (L.) Ach. 
    CHAO YUAN; XIU JUAN ZIIANG; YUAN DA DU; YU HUA GUO; LI YAN SUN; QIANG REN; AA TIAN ZHAO (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-04-11)
    An activity-directed fractionation and purification process was used to isolate the antibacterial compounds from Evernia divaricata (L.) Ach. Six lichen substances were obtained from the active petroleum ether and ethyl ...
  • Sensitivity of Cells Towards Streptolysin S (SLS) 
    BADARUDDIN A. MEMON (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-04-12)
    Streptolysin S (SLS) produced by group A Streptococcus (GAS) is very potent membrane-damaging agent and lyses a wide variety of living cells and organelles. This study is about the comparison between the relative sensitivity ...
  • Substituent Effect on the Asymmetric Induction with (1R,2S,5R)-and (1S,2R,5S)-menthol Auxiliaries 
    MUSTAFA ER; NECDFT COSKUN (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-04-13)
    Substituted benzaldehydes reacts in cis-diastereoselective manner with menthyl haloacetates in the presence of phase transfer catalyst and a base in THF at room temperature to give the corresponding 3-aryloxirane-2-carboxylates ...
  • Generation of Bioenergy by the Aerobic Fermentation of Domestic Wastewater 
    ABDUL MAJEED KHAN; MUHAMMAD MANSOOR ALI; SHAMSA NAZ; MUHAMMAD SOHAIL (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-04-14)
    This research article demonstrates the development of microbial fuel cells (MFCs) for the generation of electrical energy by the aerobic fermentation of domestic wastewater (DWW) using the yeast as a culture of microorganisms. ...
  • Continuous Bioleaching of Copper from Copper Smelters Dust with a Mixed Culture of Mesophilic Bacteria 
    FERESHTEH BAKHTIARI; MORTAZA ZIVDAR; HOSSEIN ATASHI; SEYEDALI SEYEDBAGHERI (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-04-15)
    Bioleaching of the copper flue dust of the smelting furnaces of Sarcheshmeh Copper Complex has been investigated. At present, the dust is recycled to the smelters, which reduces their efficiencies and increases the required ...
  • Synthesis, Characterization and in vitro Antibacterial Studies of Ternary Complexes using Quinolone Antibiotics as Primary Ligand 
    MUHAMMAD IMRAN; TABINDA KOKAB; SHOOMAILA LATIF; MTTU LIVIU; ZAID MAHMOOD (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-04-16)
    Some new first row transition metal ternary complexes of quinolone antibiotics (Levofloxacin, Moxifloxacin) and 1,10-phenenthroline were prepared and characterized on the basis of UV-Vis spectroscopy, IR spectral data, ...
  • An Unplanned Synthesis of Symmetrical 1,3-Disubstituted Ureas 
    SHAHNAZ PERVEEN; SANA MUSTAFA; KHALID MOHAMMED KHAN (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-04-17)
    When urea derivatives (N-aryl-N’,N’-dialkyl urea) or (N-aryl-N’-alkyl/aryl urea) 1a-1u react with diethylcarbamyl chloride at 50-60 ºC symmetrical 1,3-disubstituted ureas 2a-2f were formed as major products instead of ...
  • Synthesis of Some 1, 2, 4-Triazole Derivatives and Investigation of their Fungicidal Activities 
    IRAM JANAM SINGH; DHARMENDRA KUMAR SINGH (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-04-18)
    The synthesis of a series of 3-pyridyl-6-aryl-s-triazolo (3, 4-b) (1, 3, 4) – thiadiazoles are described. synthesis of 3-pyridyl-6-aryl-s-triazolo (3, 4-b) (1, 3, 4) – thiadiazoles (3a-m) have been achieved by the ...
  • Vinblastine: A Review 
    INAM-UL.-HAQUE; HINA SARA (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-04-19)
    Vinblastine sulfate extracted from leaves of Catharanthus roseus is widely used as an anti-cancer drug. Chemically vinblastine is one of the Vinca alkaloids that inhibit the polymerization of tubulin, resulting in the ...

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