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Issue 04: Recent submissions

Now showing items 1-20 of 24

A FACILE AND EFFICIENT APPROACH TO THE SYNTHESIS OF 2,6-DIACETYLPYRIDINE

Guangyong, Xie; Haitao AI; Lu Lei; Dongfang Zhang (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2009-08-20)

2,6-Diacetylpyridine was synthesized via esterification by using pyridine-2,6-dicarboxylic acid as precursor and successive Claisen condensation promoted by sodium for the first time. Compared with traditional sodium ...
Comparative Vapour Phase FTIR Studies and Vibrational Assignment of Cyclopentadienyl-manganese-tricarbonyl and Methylcyclopentadienyl-manganese-tricarbonyl

Zahid Mahmood; Syeda Robina, Gillani (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2009-08-20)

The FTIR spectra in solution and vapour phase of the compounds, cyclopentadienyl manganese tricarbonyl (η-C₅H₅)Mn(CO)₃and methylcyclopentatadieny l manganese tricarbonyl (η-C₅H₄CH₃)Mn(CO)₃ were measured in the region ...
Sewage Water Pollutants Removal Efficiency Correlates to the Concentration Gradient of Amendments

Zulfiqar Ahmad, Bhatti; Qaisar Mahmood; Iftikhar Ahmad, Raja (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2009-08-20)

Three coagulants viz. alum, FeClG₃, and Moringa oleifera seed extract were compared for treating municipal wastewater. The wastewater samples were collected from a drain near the Murree Road in Abbottabad city. The initial ...
The Role of Fungi as Aeroallergens in Asthma and Allergies

MUHAMMAD ANWAR, WAQAR; TASNEEM AKHTER; ASMA WAQAR; SOHAIL SHAUKAT; MUNEEBA KHAN (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2009-08-20)

Allergies and asthma are worldwide diseases causing various health problems. Their symptoms include episodic wheeziness, breathlessness, dry cough, etc. Sensitivity to a variety of fungi is known to be a major factor in ...
Herbs can Effectively Talk with Diabetogenes

MUHAMMAD ANWAR, WAQAR; SANA AIJAZ; SOHAIL SHAUKAT; ASMA WAQAR (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2009-08-20)

Diabetes mellitus type-2 is a sweet killer disease, yet to be conquered. The frequency of this disease is constantly growing, emphasizing the need of new insights into the disorder's ground realities and novel strategies ...
Multiple Signaling Pathways Mediated by Dopamine and Calcium ionophore A23187 in Human Platelets

SHEIKH ARSHAD, SAEED; MUHAMMAD ANWAR, WAQAR; JAVERIA QUADRI; ZIA-UR-REHMAN, QURESHI (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2009-08-20)

This study was undertaken to investigate the mechanism(s) of platelet aggregation induced by the synergistic action of dopamine (DA) and a Ca2+ -ionophore, A23187. DA showed non significant effect on platelet aggregation ...
Synthesis of 2-Hydroxypropyl Dimethylbenzyl Ammonium N,O-Carboxymethyl Chitosan Chloride and Its Antibacterial Activity

ZHU, XUE-MEI; CAI, ZHAO-SHENG; YANG, CHUN-SHENG; SHANG, SHl-BlN (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2009-08-20)

N,O-carboxymethyl chitosan (N,O-CMC) was prepared from chitosan with chloroacetic acid as modifying agent and NaOH as binding-acid agent. 2-Hydroxypropyl dimethyl benzyl ammonium N,O-carboxymethyl chitosan chloride ...
Cholinomimetic and Calcium Channel Blocking Activities of the Aerial Parts of Tylophora hirsuta (Wall.)

BASHIR AHMAD; NIAZ ALI; SHUMAILA BASHIR; JAMSHAID AHMAD; SADIQ AZAM; IBRAR KHAN (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2009-08-20)

The effects of crude methanolic extract of Tylophora hirsuta (Th.cr) were studied for possible cholinommetic and calcium channel blocking activities in rabbit's jejunum preparations at different doses. Maximum spasmogenic ...
Effect of Pretreatments on Enhanced Degradation of Polyisoprene Rubber by Newly Isolated Bacillus sp. Strain SIO

ZIAULLAH SHAH; SHAH, AAMER ALI; ABDUL HAMEED; FARIHA HASAN (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2009-08-20)

The present investigation was conducted to isolate polyisoprene rubber (latex gloves) degrading microorganisms from soil. Twelve bacterial species were isolated through enrichment technique and were screened for their ...
Greener Approach to the Synthesis of 4-Thiazolidinone Derivatives Using Phase Transfer Catalysts under Microwave Irradiation

MUHAMMAD NAEEM; CHAUDHRY, MUHAMMAD NAWAZ; BALOCH, IFTIKHAR HUSSAIN; RANA AMJAD (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2009-08-20)

A series of ten newly synthesized compounds are reported by adopting environment friendly microwave irradiation methodology, with an idea that these compounds will be tested for in vitro antibacterial and antifungal activity. ...
Investigation of Contaminated Environmental Samples; US DOE EML Laboratory's Quality Assessment Programme

NAILA SIDDIQUE; ASMA RAHMAN; SHAHIDA WAHEED; MOHAMMAD WASIM; MOHAMMAD DAUD; SHUJAAT AHMAD (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2009-08-20)

A Quality Assessment Programme (QAP) was initiated by the US, Department of Energy (DOE) in 1998 to establish reliability in the measurement of radionuclides in contaminated environmental samples, i.e. soil, vegetation and ...
Synthesis and Characterization of Zinc and Cadmium complexes with Deoxyalliin

SHAHBAZ NAZIR; JAMIL ANWAR; MUNAWAR ALI, MUNAWAR (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2009-08-20)

Zinc and Cadmium complexes with the amino acid, deoxyalliin (S-Allyl Cysteine), having the formulae [Zn(C6H10O2NS)2] and [Cd(C6H10O2NS)2] were synthesized and characterized by elemental analysis, FT-IR, thermogravimetry-FT-IR ...
Synthesis and Structural Aspects of 2-Chloro-N, N-dimethylbenzylamine and its Complexes with Mo(CO)6 and W (CO)6

TARIQ MAHMUD; MUHAMMAD IMRAN; JAVED IQBAL; VlCKIE MCKEE (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2009-08-20)

A new ligand 2-chloro-N,N-dimethylbenzylamine has been synthesized by the amination of 2-chloro-benzyl bromide. The synthesized ligand was further reacted with W(CO)6 and Mo(CO)6 to yield 2-chloro-N,N-dimethylbenzylamine ...
Partition Studies on Aqueous Two-Phase System using Sodium Dodecyl Sulphate and Ammonium Salts for Extraction of Dyes

REHANA KOUSAR; NIAZI, SHAHIDA BEGUM; FARZANA MAHMOOD; FARZANA IRAM (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2009-08-20)

An aqueous two-phase system consisting of sodium dodecyl sulphate (SDS), an anionic surfactant, and NH4NO3 / (NH4)2SO4 as salting out agent has been used for the extraction of ionic dyes. Transparent aqueous two-phase ...
Chemical Pollution Profile of Rehri Creek Area, Karachi (Sindh)

ATIF SHAHZAD; KHAN, MOAZZAM ALI; S. SHAHID SHAUKAT; WAQAR AHMED (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2009-08-20)

The present investigation focuses on environmental issues along Rehri Creek area, which is an imperative creek of economic importance. During the study, a total of 30 samples of wastewater (industrial waste, Cattle colony ...
Low Frequency Vapour Phase Infrared Spectra of Metal Carbonyls. Derivatives of the type (where X=Br, Cl, H, D, CH3, cm, CF3,)

ZAID MAHMOOD (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2009-08-20)

Many vibrations which occur in the far-infrared region of spectrum are similar to the types of vibrations found in other regions of the spectrum. They fall in the far-infrared because the atomic masses are large and/or ...
Synthesis and Characterization of Co (Il), Ni (Il), Cd (Il) and Cu (Il) Complexes of Bis-Schiff Bases obtained from 1,8-Diaminonaphthalene

NEVIN TURAN; MEMET SEKERCI (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2009-08-20)

The present study deals with the preparation of Schiff base and its chelates with some transition metal ions Co (II), Ni (II), Cu (II) and Cd (II). The ligand was obtained by condensation of 1,8-diaminonaphthalene with ...
Kinetics of DeSOx Reaction on Copper and Cerium-based Sorbent-Catalysts

HUI WANG; LIU, GUO JIE; YAO WANG; WEI QING Ll; Ll ZHOU; SEN SHI; JIAN SUN (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2009-08-20)

Kinetics of So2 removal using a copper-based sorbent CuO/γ-Al2O3 and a cerium modified copper sorbent CuO-CeO2/γ-Al2O3 were measured on a TGA and their kinetics behaviors were simulated with a proposed empirical rate model ...
FTIR Study of the Methylation of Phenol with Dimethyl Carbonate over KBr/Si02

BlNG CHEN; QINGNIAN DONG; NING ZHAO; WEI WEI; YUHAN SUN (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2009-08-20)

The O-Methylation of phenol with dimethyl carbonate (DMC) over KBr/SiO2 catalyst was carried out and the reaction mechanism was investigated by in-situ FTIR. It was found that phenol was deprotonated to generate phenolate ...
Partially Cd+ Ion-Exchanged Type-A Zeolites and Their Thermal Analysis

SHER AKBAR; RUKHSANA SHAHNAZ; TAJAMUL HUSSAIN, SHAH; MUHAMMAD SAMI (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2009-08-20)

A series of partially exchanged Cd2+ A-zeolites (Cd0.86 A, Cd1.7 A, Cd2.46 A, Cd2.86 A, Cd3.25 A) were prepared by aqueous cation exchange technique from synthetic NaA-zeolite. The percentage of Cd2+ ions exchanged increased ...

Now showing items 1-20 of 24

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