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Browsing Issue 02 by Title

Browsing Issue 02 by Title

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  • 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 ...
  • 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 ...
  • 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 ...
  • NASEEM ZAHRA (HEJ Research Institute of Chemistry, University of Karachi, Karachi, 2010-04-20)
    Industrial waste constitutes the major source of various kinds of pollution in natural water and toxicity from heavy metals has been reported worldwide. The presence of arsenic in water is major problem these days. High ...
  • 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. ...
  • 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 ...
  • 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 ...
  • 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), ...
  • 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), ...
  • 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. ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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, ...
  • 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 ...

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