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Volume 32: Recent submissions

Now showing items 1-20 of 126

Electrochemical Reduction of Nitrate: A Review

IMAM-UL-HAQUE; MUQADDAS TARIQ (HEJ Research Institute of Chemistry, University of Karachi, Karachi, 2010-06-20)

Nitrates are ubiquitous in water bodies. As contaminants they are considered to be hazardous. Electrochemical techniques have been investigated, appraised and developed for their removal. This review presents proposed ...
AN UPDATE OF TERPENOIDS, STEROIDS AND BIODIVERSITY OF SEAWEEDS FROM THE COAST OF PAKISTAN

ABDUL MAJEED KHAN (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-06-19)

This review article presents the comprehensive update of the ecology, biodiversity and importance of seaweeds. In addition, the article also presents the terpenoidal and steroidal compounds isolated from seaweeds of the ...
Contamination of Agro-Ecosystem and Human Health Hazards from Wastewater used for Irrigatio

MUHAMMAD JAMIL; MUHAMMAD SHARIF ZIA; MUHAMMAD QASIM (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-06-18)

The use of untreated/inadequately treated wastewater for irrigation in agriculture has been practiced for many years in arid zones of industrialized as well as developing countries. Farmers mostly use wastewater for growing ...
STUDY ON THE INCLUSION COMPLEXES OF FLUMORPH AND DIMETHOMORPH WITH Β-CYCLODEXTRIN TO IMPROVE FUNGICIDE FORMULATION

XIAO YU-MEI; WANG JIAN; WANG MING-AN; LIU JI-PING; YUAN HUI-ZHU; QIN ZHAO-HAI (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-06-17)

The β-Cyclodextrin (β-CD) complexes of Flumorph and Dimethomorph have been investigated quantitatively by UV measurement. The results showed that the 1:1 inclusion complexes were formed and the formation constants reduced ...
Comparative Study on the Antioxidant and Antimicrobial Activities of Stem-Bark Extract of Litchi chinensis and its Organic Fractions

DURRE SHAHWAR; MUHAMMAD ASAM RAZA; MIRZA ABID SHABBIR MUGHAL; MUHAMMAD ATHAR ABBASI; VIQAR U ODIN AHMAD (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-06-16)

Aqueous-methanolic (20:80) extract of stem-bark of Litchi chinensis Sonn. was fractionated with diethyl ether, ethyl acetate and n-butanol using solvent extraction technique, and then total phenols (TP), total flavonoides ...
Analysis of Free Oxygen Radicals and Antioxidant Enzyme Activities in Blood and Liver Tissues of Rabbits Operated with Argon Plasma Scalpel

MUSTAFA YONTEM; SULEYMAN KALELI; MEHMET AKDOGAN; RAMAZAN KAYAPINAR; FATIH GULTEKIN (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-06-15)

In surgical operations, many techniques are used and their side effects are investigated. The purpose of this study was to analyze free radicals and antioxidant enzyme activities in blood and liver tissues of rabbits which ...
Synthesis and Molecular Structure of Bis(4-methylpiperidino- dithiocarbamato)nickel(II)

EZZAT KHAN; AMIN BADSHAH; RHETT KEMPE (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-06-14)

Reaction of 4-methylpiperidinodithiocarbamic acid (C₇H₁₂NS₂) and nickel bromide in 2:1 ratio carried out under mild reaction conditions, affords the Ni[ (C₇H₁₂NS₂)₂] complex, 2. The complex was studied in the solution state ...
Effects of Dimenhydrinate, Prochlorperazine and Cyclizine on Thyroid Hormones and FSH in Sera of Normal Male Rabbits

AHMAD; KHALID HUSSAIN JANBAZ; SAEED AHMAD; GHULAM ABBAS (HEJ Research Institute of Chemistry, University of Karachi, Karachi, 2010-06-13)

The effects of dimenhyrinate, prochlorperazine and cyclizine on the serum thyroid hormones and follicle stimulating hormone levels were studied in normal male rabbits for 14-days. Dimenhyrinate (Group B) and cyclizine ...
Synthesis of Carbamate Derivatives of Biological Interest

SHAHNAZ PERVEEN; NASREEN FATIMA; KHALID MOHAMMED KHAN; AJMAL KHAN; MUHAMMAD ALI; MUHAMMAD IQBAL CHOUDHARY (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-06-12)

A number of carbamates derivatives 1-12 were synthesized and evaluated for their antioxidant, urease inhibition, anticancer, antibacterial and antifungal activities. N-Ethylamine-N¢, N¢-diethyl carbamate (4), showed ...
A Study of Cobalt Ions Removal from Aqueous Solutions by Sodium X-Zeolite

SHER AKBAR; TAJAMAL HUSSAIN SHAH; MUHAMMAD ANWAR; MUZAFFAR KHAN (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-06-11)

Investigations were made to determine the ion-exchange removal of cobalt ions from aqueous solutions over a pH range of 5.5-7.0 by synthetic zeolite NaX using the batch method with initial cobalt chloride solution concentration ...
Effect of Various Levels of Salinity on the Uptake of Macronutrients (N, P, K, Ca, and Mg) by the Roots and Shoots of Sunflower (Helianthus annuus L.) Hybrids

ABDUL KABIR KHAN ACHAKZAI; SAFDAR ALI KAYANI; AZHAR HANIF (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-06-10)

A pot culture experiment was conducted to study the effects of four different levels of salinity having osmotic potential of 0.00, -4.67, -9.35, and -14.03 bars on the uptake of macronutrients (N, P, K+, Ca²+, and Mg²+) ...
COMPARATIVE STUDY ON THE NO₂ BINDINGS TO (MGO)N AND (CAO)N CLUSTERS, N = 4, 6, AND 9: FORMATION OF NITRITE AND NITRATE

FATHI HASSAN BAWA (The chemical society of Pakistan is an approved society from the PSF., 2010-06-09)

A comparative study on MgO and CaO clusters toward NO2 adsorption have been investigated theoretically by the density functional theory, approach Beck3LYP. Bond lengths, bond angles as well as adsorption energies of the ...
Flow Injection Spectrophotometric Method for the Quantitative Determination of Humic Acid (HA) in Treated and Natural Waters

TAHSEEN GHOUS; AAMIR RASHEED; MUHAMMAD SIRAJ (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-06-08)

A double channel flow injection (FI) spectrophotometric method was established for humic acid (HA) determination in milligram levels in treated and natural waters. FI method was developed for the determination of humic ...
Physicochemical Characterization of Groundwater in Urban Areas of Lahore, Pakistan, with Special Reference to Arsenic

GULRAIZ AKHTER; ZULFIQAR AHMAD; JAVED IQBAL; NAZIA SHAHEEN; MUNIR HUSSAIN SHAH (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-06-07)

The current quality status of groundwater from Lahore was investigated using standard analytical methodologies. The physicochemical parameters included in the study were pH, alkalinity, electrical conductivity, TDS, hardness, ...
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 ...
Quantification of V(IV)-Maltol Complex Using Cyclic Voltammetry

HUMERA ANWER; ZAHIDA TASNEEM MAQSOOD; SYED AZHAR ALI (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-06-05)

Cyclic voltammetry is used in the present research work for the quantitative study of BMOV, (bis(maltolato)oxovanadium(IV)), the compound which shows insulin like properties. Electrochemical study of BMOV was done using ...
Cathodic Voltammetry of Nitrobenzene at Titanium in Micellar Solution

IMAM-UL-HAQUE; MUQADDAS TARIQ (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-06-04)

The present study relates to electro-reduction of nitrobenzene in the presence of miceller aqueous solution of sodium dodecyl sulphate at titanium cathode, using cyclic voltammetric and titanium etching methods in a ...
Synthesis of Dye-sensitized Solar Cell Using Nickel- tetraphenylporphrine as a Sensetizer

FAWAD AHMED; MUHAMMAD ATHAR ABBASI; AZIZ-UR-REHMAN; MUHAMMAD ASLAM AWAN; MUHAMMAD ASIF IQBAL; SYEDA AMBAR YOUSAF; MUHAMMAD JAVED IQBAL; VIQAR UDDIN AHMAD (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-06-03)

A dye-sensitized solar cell was prepared under facile conditions. For this, a wide range of metalloporphrines was investigated and consequently Ni-tetraphenylporphrine was selected because it gave the maximum output in ...
Study of Hydrodynamic and Non-Hydrodynamic Interaction Parameters for Water / PVP / PVA Ternary System by Solution Viscometry

SHER AKBAR; GHULAM SARWAR (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-06-02)

Polymer-Polymer interaction parameters from a water soluble polymer-blend solution have been determined by viscometry at 25°C. The ternary system assayed is distilled water poly (N-vinyl-2-pyrrolidone) (PVP)/Poly (vinyl ...
Effect of Orientation of Glass Fiber on Mechanical Properties of GRP Composites

SHAHZAD ALAM; FARZANA HABIB; MUHAMMAD IRFAN; WAQAS IQBAL; KHURAM KHALID (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-06-01)

Glass Fiber Reinforced polymer matrix composites are one of the most important engineering materials required for a variety of advanced and sophisticated applications in modern industry. The two components of a GRP composites ...

Now showing items 1-20 of 126

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