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Browsing Issue 02 by Title

Browsing Issue 02 by Title

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  • 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), ...
  • 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), ...
  • 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. ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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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