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Recent submissions

Issue 04: Recent submissions

Now showing items 1-20 of 30

A Sensor for Determination of Tramadol in Pharmaceutical Preparations and Biological Fluids Based on Multi-Walled Carbon Nanotubes-Modified Glassy Carbon Electrode

MOHAMMAD AFRASIABI; ZEINAB REZAYATI ZAD; SHOKAT KIANIPOUR; ALI BABAEI; ALI REZA TAHERI (The chemical society of Pakistan is an approved society from the PSF., 2013-08-08)

A chemically modified electrode is constructed based on multi-walled carbon nanotube modified glassy carbon electrode (MWCNTs/GCE). It is demonstrated that this sensor could be used for determination of pharmaceutical ...
Synthesis of Substituted 1, 4-dihydro-4-ferrocenylpyridines and 3-ferrocenyl-2-pyrazolines Catalyzed by Ionic Liquid [Bmim] OH

JIAN ZHANG; CHENGXIANG SHANG; LONGFEI JIN (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-08-04)

5-aryl-3-ferrocenyl-1-phenyl-2-pyrazolines have been synthesized by the reaction of α, β-unsaturated ketones with phenylhydrazine in ionic liquid [Bmim]OH. While 4-ferrocenyl-1,4-dihydropyridine-2,6-dimethyl-3,5-dicarboxylic ...
The Dissipation of Pyrimorph in Lake Water/Sediment Systems

ZHUONAN LI; WENBI GUAN; YONGQIANG MA; HENG ZHAO; ZHAOHAI QIN (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-08-10)

A study into the environmental behavior of pyrimorph in lake water/sediment systems has been carried out. The residue of pyrimorph in water and sediment for aerobic and anaerobic tests was determined, respectively. For ...
Microwave Assistant Synthesis, Crystal Structure and Biological Activity of A 1,2,4-Triazole Compound

WEI KE; NA-BO SUN; HONG-KE WU (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-08-09)

The title compound (C₁₇H₁₄F₂N₄SO) were synthesized and recrystallized from CH₃CN. The compound was characterized by ¹H-NMR, FTIR, MS, HRMS and X-ray diffraction. The compound crystallized in the Monoclinic space group C2/c ...
Synthesis, Crystal Structure and Biological Activity of A Novel 1,2,3-Thidiazole Compound

WEI KE; NA-BO SUN; HONG-KE WU (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-08-07)

A new 1,2,3-thiadiazole compound was synthesized and characterized by ¹H NMR, MS and HRMS. The crystal structure of the title compound (C₁₂H₁₁ClN₂O₄S₂, Mr = 346.80) has been determined by single-crystal X-ray diffraction. ...
Synthesis of Three New Donor- Acceptor [4] Dendralenes

MIR MUNSIF ALI TALPUR; TAJNEES PIRZADA; PETER SKABARA; THOMAS WESTGATE; MOHAMMAD RAZA SHAH (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-08-06)

Three new donor - acceptor [4] dendralene compounds have been synthesized. Wittig reaction was used for the preparation of first two compounds and third one by Knoevehagel condensation. Their mass was calculated by APCI ...
A Facile Multi Component Synthesis of Some Functionalized Chromenes and Spiroindole Derivatives using DABCO as an Efficient Catalyst

AKBAR MOBINIKHALEDI; MAHSA JABBARPOUR (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-08-06)

Chromene and spirocyclic 2-oxindole derivatives were readily synthesized in good yields via a one-pot three-component reaction involving Knoevenagel condensation of aromatic aldehyde or isatin with an active methylene ...
Gas Chromatographic Mass Spectrometric Analysis of n-Hexane Fraction of the Leaves of Sugar Beets (Beta vulgarus)

ZAHID HUSSAIN; PIR MOHAMMAD; KHAIR ZAMAN; KHALID MOHAMMED KHAN; SHAHNAZ PERVEEN; SADAF NIAZ (HEJ Research Institute of Chemistry, University of Karachi, Karachi, 2013-08-06)

The n-hexane fraction of the leaves of sugar beet was analyzed qualitatively and quantitatively using GC-MS and GC equipped with FID in separate experiments. The crude was extracted using ethanol and fractionated by n-hexane, ...
Application of Antioxidant Indicators to Select Nicotine-Degrading Bacterium for Bioaugmented Treatment of Tobacco Wastewater

HONGZHEN HE; MEIZHEN WANG; HUAJUN FENG; XIN ZHENG; DONGSHENG SHEN (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-08-05)

To select nicotine-degrading bacterium for bioaugmented treatment of tobacco wastewater, the activities of antioxidant indicators such as superoxide dismutase (SOD), catalase (CAT) and glutathione (GSH), and the ability ...
Determination of Estrogens in Milk by HPLC using Salting-Out Extraction

DEQING ZOU; YAN ZOU; ZHIGANG TAI; QI WANG; YALING YANG (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-08-04)

A simple salting-out assisted liquid–liquid extraction (SALLE) method with acetonitrile combined with high-performance liquid-chromatography was developed and applied for the determination four kinds of estrogens (estradiol ...
Synthesis of Attapulgite Clay@Fe₂O₃ Composite via Ionic Liquid and Its Application in the Oxidation of Elemental Mercury

HUI CANG YU LU; FEN NV HAN; JING LING SHAO; QI XU (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-08-04)

Attapulgite clay@Fe₂O₃ (ATP@Fe₂O₃) composite was prepared by a one-pot calcination process via the ionic liquid (IL), [bmim]PF₆, using two cheap, ecofriendly materials (i.e., Fe(NO₃)₃•9H₂O and ATP, which is a magnesium ...
Synthesis of 8-substituted 4, 4-difluoro-4-bora-3a,4a-diaza-s-indacene Dyes (BODIPY)

AHMET TUTAR; RAMAZAN ERENLER; JEAN-FRANÇOIS BIELLMANN (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-08-04)

4,4-Difluoro-4-bora-3a,4a-diaza-s-indacene (BODIPY) dyes are important in synthetic and applied chemistry. The reaction of pyrrolomethane 1 with acetyl chloride and boron trifluoride etherate in the presence of triethylamine ...
Poly (N-vinyl-2-pyrrolidone-co-acrylic acid): Comparing of “Traditional Heating” and “Microwave-Assisted” Free Radical Polymerization

KADRIYE KIZILBEY; SERAP DERMAN; ZEYNEP MUSTAFAEVA (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-08-03)

In organic chemistry microwave irradiation has become a common heat source and the use of microwave irradiation is also increasingly studied for polymerization reactions. Polymers have been synthesized at long reaction ...
Synthesis and In vitro Antioxidant Activities of Novel 4-(3-methyl-2-thienylmethyleneamino)-4,5-dihydro-1H-1,2,4-triazol-5-one Derivatives with Their Acidic Properties

OZLEM GURSOY KOL; HAYDAR YUKSEK; FATIH ISLAMOGLU (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-08-03)

In the present study 3-alkyl(aryl)-4-amino-4,5-dihydro-1H-1,2,4-triazol-5-ones 2a-i reacted with 3-methyl-thiophene-2-carboxyaldehyde to afford the corresponding 3-alkyl(aryl)-4-(3-methyl-2-thienylmethyleneamino)-4,5-dih ...
Synthesis of N, N'-bis(benzoyl) azelaic acid dihydrazide and its Effect on Performance of Poly (L-lactic acid)

YAN-HUA CAI (The chemical society of Pakistan is an approved society from the PSF., 2013-08-02)

In order to synthesize more function amides, N, N'-bis(benzoyl) azelaic acid dihydrazide(NA(A)) was synthesized from benzoyl hydrazine and azelaoyl chloride which was deprived from azelaic acid via acylation. The influence ...
Structural Elucidation of in Vitro and in Vivo Metabolites of Emodin in Rats by LC -ESI-MS/MS

DONGGENG WANG; LINA CHEN; QING ZHU; GUANGTONG CHEN; BAOHUA LIU (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-08-01)

Emodin is a widely occurring natural product and has been studied extensively for its varieties of pharmacological activity. In attempt to know more deeply about its metabolism, this paper investigated the metabolites of ...
Development of High Performance Liquid Chromatographic Method with Pre-Column Derivatization for Determination of Enantiomeric Purity of Hydantoin-5-acetic Acid

DAO CAI WANG; YU CAO; ZHI JIAN HE; SHUN YAO; HANG SONG (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-08-02)

The objective of the present work was to develop and validate a rapid analytical method for determination of enantiomeric purity of hydantoin-5-acetic acid. The method was based on pre-column derivatization of hydantoin-5-acetic ...
Synthesis of Mesoporous Silica Submicrospheres with High Specific Surface Area via a Modified Octylamine Templating Process

XIANG-FENG WU; CHANG-RUI WANG; YONG-KE ZHAO (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-08-11)

Mesoporous silica submicrospheres with high specific surface area, 930.9m⁹/g, were synthesized without using any acid or alkali as catalyst. Tetraethoxysilane as silica source, octylamine as template and polyoxyethylene ...
The Origin and Characterization of Soluble Organic Matter in the Phosphate Rock (Mardin-Mazıdağı-Turkey)

JALE NAKTIYOK; ABDUL KADIR ÖZER; MURAT ÇELIK; MUSTAFA ŞAHIN GÜLABOĞLU (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-08-10)

In this study, the origin and structure of the soluble organic matter in the phosphate rock was investigated. The organic matter was extracted with n-hexane from the phosphate rock. Its structure was analyzed by using TG, ...
Simultaneous Oxidative Conversion and CO2 Reforming of Methane to Syngas over Modified Ni/Al2O3 Catalysts

YUANFENG LIU; ZHENSHAN HOU; WUMANJIANG ELI; ZHENHONG HE (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-08-09)

A series of Ni/Al₂O₃ and modified Ni-M/Al₂O₃ (M= La, Na, K, Ca and Ba ) catalysts have been prepared and characterized by XRD, BET, XPS, TGA, TEM and SEM. The performance of these catalysts for simultaneous oxidative ...

Now showing items 1-20 of 30

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