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Browsing Volume 32 by Title

Browsing Volume 32 by Title

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  • Gas Chromatographic Analysis of Tranexamic Acid in Pharmaceutical Preparation Using Ethyl Chloroformate as Derivatizing Reagent 
    KULSOOM UBEDULLAH ABBASI; MUHAMMAD YAR KHUHAWAR; MUHAMMAD IQBAL BHANGER (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-06-06)
    Ethyl chloroformate (ECF) has been used as derivatizing agent for gas chromatographic (GC) determination of tranexamic acid (TA). The elution was from the column HP-5 (30 m x 0.32 mm i.d.) connected with flame ionization ...
  • Gas chromatographic-Mass Spectrometric Analysis of the Products Obtained by Microwave-Metal Interaction Pyrolysis of Coal 
    NADIA BASHEER; KHADIM HUSSAIN; KHALID MOHAMMED KHAN; ZAHID HUSSAIN (Karachi: The Chemical Society of Pakistan, 2010-12-14)
    A novel method for the liquefaction of coal has been investigated. It is a microwave assessed thermal cracking of coal in the presence of iron mesh. The iron mesh acts as antenna for the microwaves. This microwave metal ...
  • GC-MS Analysis of n-hexane Extract from Seeds and Leaves of Phoenix dactylifera L. 
    SUMBUL AZMAT; REHANA IFZAL; MUNAWWER RASHEED; FARYAL VALI; VIQAR UDDIN AHMAD (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-10-20)
    n-hexane extract of Phoenix dactylifera L (Date Palm) seeds and leaves was analyzed through capillary GC-MS. The compounds were identified by comparison of GC-MS spectrum with library searches. A total of forty one compounds ...
  • 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. ...
  • Heavy Metal Levels in Commonly used Traditional Medicinal Plants 
    SUMAYYA SAIED; ERUM ZAHIR; AZHAR SIDDIQUE (Karachi: The Chemical Society of Pakistan, 2010-12-07)
    In the present study a survey of 24 commonly used medicinal plants of Indian subcontinent origin was carried out to evaluate their levels of heavy metals by electrothermal atomic absorption spectroscopy. The results showed ...
  • 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 ...
  • Impacts of Solid Waste Leachate on Groundwater and Surface Water Quality 
    SIDRA KARIM; MUHAMMAD NAWAZ CHAUDHRY; KHURSHED AHMED; ADlLA BATOOL (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-10-20)
    The present investigation was carried out to assess the impacts of solid waste leachate on groundwater and surface water quality at unlined dumping site. Six leachate samples collected from different locations have average ...
  • Investigation of Heavy Metals Content in Medicinal Plant, Eclipta alba L. 
    IQBAL HUSSAIN; HAMAYUN KHAN (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-02-20)
    Heavy metal such as Cr, Fe, Zn, Mn, Ni, Pb, Cu and Cd were investigated in a medicinally important plant, Eclipta alba L. as well as in the soil it was grown using atomic absorption spectrophotometer. The plant samples ...
  • IONIC LIQUID CATALYZED SYNTHESIS OF 3,4-DIHYDROPYRIMIDIN-2(1H)-ONES UNDER MICROWAVE IRRADIATION 
    QIN WANG; AND WEN PEI (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-12-20)
    An effective synthesis of 3,4-dihydropyrimidin-2(1H)-one derivatives using ionic liquid 1-n-butyl-3-methylimmidazolium hexafluorophosphate ([bmim]PF₆) as the catalyst from aldehydes, 1,3-dicarbonyl compounds and urea ...
  • 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 ...
  • Maclafferty Rearrangement in Germyl Derivatives of Organo-tin Carboxylates 
    MUHAMMAD AZIZ CHOUDHARY; KHAWAJA ANSAR YASIN; HABIB-UR-REHMAN; SADIQ-UR-REHMAN (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-08-20)
    Bimetallic compounds of general formula [(R¹)₃GeCHR²CHR³COO]₂Sn[R⁴]₂and [R¹GeCHR²CHR³COO]Sn[CH₂C(CH₃)]₃ have been synthesized by the reported methods and were studied by mass spectrometric analysis to explore their ...
  • Mass Spectral Studies of Tetraorganotin (IV) Compounds Containing Long Chain Alkyl and Aryl Groups 
    SADIQ-UR-REHMAN; MUHAMMAD AZIZ CHOUDHARY; SAQIB ALI; MOAZZAM HUSSAIN BHATTI (Karachi: The Chemical Society of Pakistan, 2010-12-06)
    Tetraorganotin (IV) compounds having general formula R₄₋xSnR'x where R = CH₃, n-C₄H₉, C₆H₅, C₆H₅CH₅, R' = n-C₆H₁₃and x = 1 or 2, have been synthesized by the reaction of R₂SnCl₂ and R₃SnCl with appropriate amount of ...
  • Microstructural Development of Superconducting Phases in Pb-BSCCO System Derived from Sol-Gel Technique 
    AMMAD HUSSAIN QURESHI; NAZAR HUSSAIN; SHAHID KHAN DURRANI; HASSAN WAQAS; MUHAMMAD ARSHAD (Karachi: The Chemical Society of Pakistan, 2010-12-10)
    Sol-gel processing technique has been utilized to produce the gel of Pb-BSCCO system (Bi₂-xPbx Sr₂ Ca₂ Cu₃ O₁₀ ±y, where x = 0.2, 0.4, and 0.8, are the mole fraction of Pb substituted against Bi). The gel samples were ...
  • Mineral Composition of Date Palm Fruit and Pit by Atomic Absorption Spectrophotometry 
    IMDADULLAH MOHAMMAD; IZIARAT SHAH; HAMAYUN KHAN; IHSANULLAH; HIZBULLAH KHAN (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-02-20)
    The mineral composition of date palm available in Peshawar, Pakistan has not been reported previously. The current study was therefore, undertaken to investigate the minerals composition of date palm fruit and pit. The ...
  • MIXED LIGAND COPPER(II) COMPLEXES OF PYRROLIDINEDITHIOCARBAMATE AND DIAMINES 
    SAEED AHMAD; MASOOD SARWAR; SAJJAD AHMAD; SAQIB ALI; KHURRAM (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-08-20)
    Copper(II) complexes of pyrrolidinedithiocarbamate (PDTC) and diamines having the general formula, [Cu(diamine)(PDTC)]Cl, [Cu(diamine)Cl₂][Cu(PDTC)Cl] or [Cu₂(di-amine)(PDTC)₂Cl₂] (diamine = 1,3-diaminopropane, ...
  • 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 ...
  • Modified Synthesis of Phenolic Novolac by Biomass Pyrolysis Oil 
    XU JUNMING; JIANG JIANCHUN; DAI WEIDI; SUN YUNJUAN (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-10-20)
    The possibility of synthesis of fast curing phenolic novolac has been studied under the catalyst of HCl/ Zn(AC)₂ . Synthesis of high-ortho novolac resins modified with different concentration (10, 20, 30 and 40 wt %) of ...
  • Naturally Occurring Antifungal Aromatic Esters and Amides 
    MUHAMMAD SHAIQ ALI; SHAHNAZ; SOBIA TABASSUM; MUHAMMAD KASHIF PERVEZ; ISIAKA AJANI OGUNWANDE; OLADOSU ADEBAYO IBRAHIM (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-08-20)
    During the search of antifungal natural products from terrestrial plants, a new long chained aromatic ester named grandiflorate (1) along with spatazoate (2) from Portulaca grandiflora and N-[2-methoxy-2-(4-methoxyphenyl) ...
  • New High Performance Liquid Chromatographic Method for Simultaneous Determination of Diclofenac and Meloxicam in Oral Formulation of Liposomes and Human Plasma 
    ASADULLAH MADNI; MAHMOOD AHMAD; MUHAMMAD USMAN; MALIK MUHAMMAD ZUBAIR; MUHAMMAD QAMAR-UZ-ZAMAN; HAJI MUHAMMAD SHOAIB; ABUBAKAR MUNIR; SHUJAT ALI KHAN; MUHAMMAD NAEEM AMIR; MUHAMMAD SALEEM QURESHI (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-10-20)
    A new, easy and consistent reversed-phase high-performance liquid chromatographic method with diode array detection has been developed and validated for the simultaneous determination of diclofenac potassium (DP) and ...

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