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Browsing Volume 10 by Title

Browsing Volume 10 by Title

Now showing items 1-20 of 35

Analysis of Volatile Constituents of Pakistani Coleus aromaticus Plant Oil by Capillary Gas Chromatography IMass Spectrometry

INAM UL HAQUE (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 1988-09-20)

Thymol 79.6%, has been shown to be the princi pal compound among fi f teen components detected in the essential oil of the Coleus aromaticus
Carbonization of Walnut Shells and the Determination of Surface Acidity of Charcoal by Selective Neutralization Technique

M. ARSALA KHAN; FAZAL RABBI (The Chemical Society of Pakistan, 1988-12-05)

Charcoal obtained from walnut shells were studied for determining the acidic surface complexes by selective neutralization technique using bases of different strengths. Effect of time, benzene extraction and demineralization ...
Cyclisation Reaction of Dibenzoylmethanemono-- (tosylhydrazone) with Butyllithium and Lead tetraacetate.

C.M. ASHRAF; MUSHTAQ AHMAD (The Chemical Society of Pakistan, 1988-12-07)

Dibenzoylmethanemono(tosylhydrazone) undergoes cyclisation reaction with butyllithium and lead tetraacetate to afford 3,5-diphenylpyrazole in good yield in both cases. Mechanistic schemes have been postulated to account ...
Determination of Chromium in Collected Leather Samples and Tannaries Waste by Spectroscopic Techniques.

MOHAMMAD RASUL JAN; MOHAMMAD DAUD; SHAHID PERVEZ; SAEED ANWAR (The Chemical Society of Pakistan, 1988-12-06)

Chromium was extracted from collected leather samples by two different methods and in the extracted solution chromium was determined by U.V./Vis and atomic absorption methbds. The chromium values in the extracted solution ...
Determination of Some Naturally Occuring Hydroxylated Anthraquinones by Differential Pulse Polarography

A. TEMIZER; A.N. ONAR; M.T. ORBEY; B. SENER; M. BASGUL (The Chemical Society of Pakistan, 1988-12-13)

Differential pulse polarographic analyses were carried out on the hydroxylated anthraquinone contents of various Rumex species growing in Turkey. Alizarin and emodin, which were extracted both from the roots and aerial ...
Effect of Mercuric Salts on Xylenol Orange and Their Halochromic Effect

E.A.EL-SAWI; N.G.KANDILE; S.M. SHENDY; I.KH.EL-SAYED (The Chemical Society of Pakistan, 1988-12-01)

Xylenol orange reacts with mercuric acetate, chloride and iodide in non polar and polar medium to give mercurated products. Their structures are confirmed by analytical data, IR, UV/V and MS spectra. The halochromic effects ...
Gas Chromatographic Separation of Copper(ll), Nickel(ll) and Palladium(ll) Complexes of Meso-and DL—Bis (Isopropanoylacetone) Stilbenediimine

M. Y. KHUHAWAR; A.K. Talpur (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 1988-09-20)

Copper( l l) , nickel (Il) and pal ladium(ll) complexes of bis( isopropa- PA S) and nickel (Il) and palladium(ll) PA S) are prepared for their possible use for gas chromatographic separation of copper, nickel ånd pal ladium. ...
A High Yield Method of Preparation of Pyridine-2-aldehyde

RASHID IQBAL; AWAD EL-HOSSADI; SABIHA SARWAR BAQAI (The Chemical Society of Pakistan, 1988-12-16)
An Indirect Spectrophotometric Method for the Microdetermination of Nitrogen (as ammonia)

JAMIL ANWAR; ANJUM IMTIAZ; SUMRA JAN; NAGRA, SAEED AHMAD (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 1988-09-20)

A simple indirect spectrophotometric method for the determination of nitrogen (as ammonia) is described. The method is based on the fact that in a neutral medium the precipi tat ion of nickel with dimethylglyoxime remains ...
Kinetics of the Thermal Gas—phase Decomposition of 2—Ethoxypropene

IFTIKHAR A. AWAN; M.C.Flowers (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 1988-09-20)

Ki netics of the gas phase deconposition of 2-ethoxypropene has been studied over the temperature range 544-635 K at a pressure between 3 and 72 torr. Ethene and propanone, fomed in equimolar amunt ( ± 4 Z), were the major ...
Large Amplitude Pulse Voltammetry of Aromatic Amino Compounds

INAM UL HAQUE (The Chemical Society of Pakistan, 1988-12-12)

Large amplitude pulse voltammetry of aniline, p-anisidine, p-phenetidine, p-chloroaniline and m- dimethylaminoanisidine in nearly neutral aqueous solution at low concentrations shows that the anodic oxidation of these ...
The Newtonian Viscosity of Polymer Solutions: Over a Wide Range of Concentrations

BALOCH, MUSA KALEEM (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 1988-09-20)

Viscos i ty of three pol ymers, namely polyi sobutyl ene, cel lulose acetate and polyschizophyl Ian, having different degree of flexibility is investigated over a wide range of concentrations and weights. The data so ...
Nitration of Hector's Base

BUTLER, ANTHONY R.; HUSSAIN, ISHTIAQ (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 1988-09-20)

Ni tration of Hector's Base gives both mno and dinitro products. in each case, only one out of two phenyl rings involves in the nitration process and that ring is the 3-anilino portion of the kkctor's Base. The protonation ...
On the Formation of Mn(II) Anthranilic Acid Anilide Complexes. Structural Elucidation by TGA, IR, Electronic, EPR Spectra and Potentiometric Studies

SAMY; M.ABU-EL-WAFA; MOSTAFA A.EL-BEHAIRY; RAAFAT M. ISSA; AKILA A. SALEH (The Chemical Society of Pakistan, 1988-12-15)

A new series of Mn(1I)-anilide complexes have been prepared and chara¬cterized by elemental analysis, TGA and IR spectra. Electronic and EPR spectra indicate octahedral geometry around the MN(II) ion, where the solvent ...
Phase Transfer Synthesis of Sulphamethoxazole 1 N (methyl 2,3,4-tri-O-acety1-13-D-glucuronide)

BASHIR AHMAD; J.W.POWELL (The Chemical Society of Pakistan, 1988-12-09)

Sulphamethoxyazole-N1 -(methyl 2,3,4-tri-O-acetyl-6-D-glucuronide) was successfully synthesized and characterized by NMR and mass spectrometry for the metabolic study of suiphamethoxazole.
Polarographic Behaviour of Some Sulphonic—aryl—hydrazono Dyes Pyrazolin-5-one Dyes

BASHEIR A. EL-SHETARY; MOHAMED S; ABDEL-MOEZ; FAROUK I. ZIDAN; SHAKER L. STEVAN (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 1988-09-20)

Polarographic studies of some sulphonic aryl (or napthol ) hydrazono -I-phenyl -3-methyl -2-pyraz01in-5-one have been carried out in ethyl alcohol B. R. buffer solutions in the pH range 1.8 - 12.0. The nurrber of reduction ...
Reaction of 3-Ben zylidenephthalide with Diamines and p-Aminophenylcarboxylic Acids & Antimicrobial Activities of the Products

A.H.BEDAIR; R.Q.LAMPHON; S.A.GHAZAL (The Chemical Society of Pakistan, 1988-12-02)

Bis-(2-methylene-3-benzalphthalimidine) II, desoxybenzoin-o-(4'- aminophenyl) carboxamide III and 2- (substitutedpheny1)-3-benzalphthalimidines of type IV and V were obtained via interaction of corresponding diamines with ...
Reduction of Aromatic Nitro Compounds Using Aluminium Scrap

M.S. KHAN; ABDUL HANAN; ABDUL MAJEED (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 1988-09-03)

Reduction of aromatic nitro compounds with metals and concentrat¬ed acids have most commonly been carried out using iron, tin, zinc and magnesium metals. The acids used are H2SO4' HC1 and acetic acid. Astonishingly enough ...
Review: Glycoproteins: Biologically Vital Macromolecules

NASIR-UD-DIN; EVELYNE WALKER-NASIR; M.A.K.MALGHANI; S.ALTAF HUSSAIN (The Chemical Society of Pakistan, 1988-12-17)
Sesquiterpenoids of Ferula Species

HASSAN M.G.AL-HAZIMI (The Chemical Society of Pakistan, 1988-12-18)

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