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Browsing Issue 06 by Issue Date

Browsing Issue 06 by Issue Date

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  • Ultrasound-Assisted Emulsification–Microextraction Combined with Flame Atomic Absorption Spectrometry for Determination of Trace lead in Water Samples 
    LI, JING CI; ZHANG, JING WEN; WANG, YU KUN; XIN DU; MA, JING JUN; GAO, HE QING (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-12-20)
    The process of ultrasound-assisted emulsification–microextraction (USAEME) was successfully applied for the extraction and preconcentration of trace lead from water samples, prior to flame atomic absorption spectrometry ...
  • Assessment of Pesticide Residues on Selected Vegetables of Pakistan 
    KHAN, MUHAMMAD SAQIB; SHAH, MOHAMMAD MAROOF; QAISAR MAHMOOD; AMJAD HASSAN; KEHKASHAN AKBAR (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-12-20)
    The present study was conducted to determine the pesticide residues on selected summer vegetables. Five vegetables were grown with three replicates in a split plot randomized complete block design. Pesticides were sprayed ...
  • Concentration of Residual Copper in the Bitter Gourd Samples Available in Punjab-Pakistan 
    ATHER, ABDUL QAYYUM; SABRI, MUHAMMAD USMAN; PHOOL SHAHZADI (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-12-20)
    Copper is very common substance that occurs naturally in the environment and spread through natural phenomena. Human widely use copper. In agriculture copper sulfate is used as a pesticide and fertilizer. The trade ...
  • Historical Development of Magnetite Nanoparticles Synthesis 
    KHAN, UMAR SAEED; KHATTAK, NAZIR SHAH; AMINUR RAHMAN; FARIDULLAH KHAN (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-12-20)
    Top down and bottom up are two fundamental routes for the formation of magnetite nanoparticles (MNPs). These routes are generally utilized for producing technologically and economically significant MNPs. This review discusses ...
  • Gasification Characteristics of Auto Shredder Residue 
    SHAHID NAVEED; NAVEED RAMZAN; ABDULLAH MALIK; MUHAMMAD AKRAM; ROSKILLY AP (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-12-20)
    Given the large volume of used tyre waste generated each year it is imperative that suitable re-use and disposal techniques are developed for dealing with this problem; presently these include rethreading, reprocessing for ...
  • Effect of UHT Processing and Storage Conditions on Physico-chemical Characteristics of Buffalo Skim Milk 
    IMTIAZ HUSSAIN (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-12-20)
    The obtained results indicated that physico-chemical and nutritional changes in UHT processed buffalo skimmed milk were more pronounced at 45°C than 25°C and 10°C. Duration of storage adversely affected the chemical and ...
  • Localization of Streptolysin S (SLS) by Blood Agar Overlay Technique (Zymogram) 
    BADARUDDIN A. MEMON (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-12-20)
    Streptolysin S (SLS) is the non-antigenic, oxygen-insensitive cytolysin which is produced by Group A streptococci. It is largely responsible for a zone of beta-haemolysis surrounding colonies on blood agar media. In this ...
  • Atom Transfer Radical Copolymerization of Phenoxycarbonylmethyl Methacrylate with Methylmethacrylate: Their Monomer Reactivity Ratios and Thermal Stabilities 
    NEVİN ÇANKAYA; KADİR DEMİRELLİ (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-12-20)
    The atom transfer radical polymerization of phenoxycarbonylmethyl methacrylate (PCMMA) and its atom transfer radical copolymerization (ATRP) with methyl methacrylate (MMA) were performed in bulk at 110 °C in the presence ...
  • Assessment of Concentration of Lead, Cadmium, Chromium and Selenium in Blood Serum of Cancer and Diabetic Patients of Pakistan 
    MUHAMMAD SALMAN; RABIA REHMAN; TARIQ MAHMUD; WAHEED-UZ-ZAMAN; UMER SHAFIQUE; JAMIL ANWAR; ALI, SANA ZULFIQAR (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-12-20)
    Heavy metals have specific role in the progression of diseases. The aim of this study was to investigate the level of toxic elements, i.e. lead, cadmium, chromium and selenium in blood serum of type 1 diabetes mellitus and ...
  • Study of Lead Pollution in Air, Soil and Water Samples of Quetta City 
    MUZAFFAR KHAN; KHAN, GHULAM MUSTAFA; SHER AKBAR; PANEZAI, MUHAMMAD ANWAR; TALAT ZAMIR; ZIA-UL-HAQ (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-12-20)
    This study briefly presents the collected data of lead pollution in the environment of Quetta City in Balochistan, Pakistan .The samples were collected from different sites. The analysis of lead was carried out in underground ...
  • Minerals and Nutritional Composition of Camel (Camelus dromedarius) Meat in Pakistan 
    TARIQ MAHMUD; RABIA REHMAN; JAMIL ANWAR; SAKHWAT ALI; AADIL ABBAS; MUHAMMAD SALMAN (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-12-20)
    The quality of camel meat has received little attention so far in Pakistan. It is nutritionally as good as that of the major sources of red or white meat. Camel is a desert animal but is not less than other red meat animals ...
  • Evaluation of Antioxidant Potential of Citrus Peel Extracts 
    CHATHA, SHAHZAD ALI SHAHID; ABDULLAH IJAZ HUSSAIN; ASI, MUHAMMAD RAFIQUE; MUDASIR MAJEED; NASIR IQBAL, HAFIZ MUHAMMAD (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-12-20)
    The antioxidant potential of different solvent extracts of three different locally grown citrus varieties; grape fruit, lemon and mussambi, was assessed using some antioxidant assays like estimation of total phenolic ...
  • Evaluation of Batch Biosorption of Chromium (VI) from Aqueous Solution by Chemically Modified Polyalthia longifolia Leaves 
    RABIA REHMAN; JAMIL ANWAR; TARIQ MAHMUD; MUHAMMAD SALMAN; MARIA SALEEM (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-12-20)
    Removal of toxic metals from surface water is a significant matter of concern. Biosorption is emerging as an economical and ecofriendly methodology for the removal of toxic chemicals from waste water. Optimization of ...
  • Development of an HPLC Fingerprint for Quality Control of Genkwa flos 
    XIA, LIN-BO; QIAN DONG; JIA, TIAN-ZHU; GUO, YAN-HUA; DENG, SHI-REN (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-12-20)
    Genkwa flos is a widely used herbal plant with great medical value in traditional Chinese medicine. For identification and effective quality control of Genkwa flos, a chemical pattern expressed by high performance liquid ...
  • Synthesis of Substituted Pyrimidin-4(1H)-one (Uracil) Derivatives and Some of Their Reactions 
    MOHAMMAD BARMAKI (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-12-20)
    In this paper I described two practical routes for the synthesis of substituted Uracilderivatives and achieved some of their reactions. In the first synthesis which is based on the condensation reaction of ethyl 2- ...
  • Recycling of NiCd Batteries by Hydrometallurgical Process on Small Scale 
    KIM, YOUNG-JU; KIM, JI-HOON; THI, LIEN DUONG; QURESHI, TAHIR IMRAN (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-12-20)
    High recovery of cadmium metal from household spent nickel cadmium batteries through hydrometallurgical process on small scale was conducted. Recovery of metal through separation of leached metal ions using ion exchange ...
  • Effect of Solid Waste on Heavy Metal Composition of Soil and Water at Nathiagali-Abbottabad 
    MUHAMMAD IRSHAD; NOREEN MALIK; TARIQ KHAN; FARIDULLAH (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-12-20)
    This experiment concluded that the waste material produced tangible impacts on soil and water system of Nathiagali. The dumping of waste resulted in a marked increase in the concentration of metals in soils and the measured ...
  • Intercomparison Exercises; A Requirement for Accurate and Precise Analytical Data 
    NAILA SIDDIQUE; S. WAHEED (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-12-20)
    External evaluation of laboratory results and procedures can be carried out by participation in intercomparison exercises. The results of the International Atomic Energy Agency - Marine Environmental Laboratory (IAEA-MEL), ...
  • The Effect of Cadmium and Chromium Concentration, on Biological Activity of Marsilea minuta 
    ZAHID HUSSAIN; KHAN, KHALID MOHAMMED; SHAHNAZ PERVEEN; NIDA AMBREEN; WAJID UR RAHMAN; ATA ULLAH (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-12-20)
    Antibacterial activity of the Marsilea minuta was investigated that was collected from four different places of the same stream. The activities were correlated with the chromium and cadmium ions contents of the stream. ...
  • Vindoline and its Reactions 
    INAM-UL-HAQUE; HINA SABA (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-12-20)
    Vindoline is a major alkaloid from the leaves of Vinca roseus Linn. (Catharanthus roseus G. Don) Apocynaceae. Chemically vindoline lacks physiological activity alone but is contained as the pentacyclic moiety in the ...

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