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Now showing items 1-14 of 14

Cholesterol Metabolism in Asterias Rubens

A. SATTAR KHAN (Karachi: International Centre for Chemical and Biological Sciences, H.E.J. Research Institute of Chemistry, University of Karachi, 2000-09-12)

[41-14C] choleslerol, (26J4C) cholesterol and (2-J4C) acetic acid were employed to study cholesterol metabolism in A. rubens,. With (4J4C) cholesterol highest radioactivity was found in free sterols (71 %) and steryl ...
Determination of Microamount of Carbon in Selected Samples of Iron, Steels, Ferro-Alloys and Metal Powder

JAVED AKHTAR; SHAHID KHAN DURRANI; N.A. CHUGHTAI (Karachi: International Centre for Chemical and Biological Sciences, H.E.J. Research Institute of Chemistry, University of Karachi, 2000-09-05)

The influence of non-meta1lic components such as nitrogen, hydrogen and carbon has significant effect on the microstructure and ultimately on the mechanical properties of iron steels and ferro-alloy products. For the ...
Extraction and Spectrophotometric Determination of Molybdenum and Iron in the Thiocyanate System

SAEED-UR-REHAMN; SHABNAM YAMIN; KHAN, KAMIN (Karachi: Journal of chemical society of Pakistan, H.E.J. Research Institute of Chemistry, University of Karachi, 2000-09-02)
IR and 111-NMR Investigations for Molecular Interactions between Methyl Methacrylate and Methylcyanoacetate

MIR MUNSIF ALI TALPUR; A. KAIM; T. PIRZADA; T. KASPRZYCKA-GUTTMAN (Karachi: International Centre for Chemical and Biological Sciences, H.E.J. Research Institute of Chemistry, University of Karachi, 2000-09-08)

The molecular interaction between. methyl methacrylate (MMA) and methylcyanoacetate (MCA) has been studied. The IR results show a lower electron density for vinyl as well as for the carbonyl double bond of methyl ...
Measurements of Photochemical Oxidants at Sindh Industrial Trading Estate of Karachi, Pakistan

A.H.K. YOUSUFZAI; DURDANA RAIS HASHMI; ISHAQ QAIM KHANI (Karachi: International Centre for Chemical and Biological Sciences, H.E.J. Research Institute of Chemistry, University of Karachi, 2000-09-07)

Continuous measurement of nitrogen oxides (NO and NOx) and ozone (03) were carried out by Air Pollution Monitoring Mobile Laboratory at a sampling lite located in the Sindh Industrial Trading Estate (SITE) of Karachi. The ...
Organic Reactions in Aqueous Medium Part-XI: Effect of Sonication on the Reaction of Benzoylacetone with Semicarbazide Hydrochloride in the Formation of 3-Phenyl-5- methylpyrazole and 3-Phenyl-5-methylpyrazole-l-carboxamide

SH. SHAUKAT ALI; KHAN, `SHAFIULLAH; C.M. ASHRAF (Karachi: International Centre for Chemical and Biological Sciences, H.E.J. Research Institute of Chemistry, University of Karachi, 2000-09-10)

Reaction of benzoylacetone with semicarbazide hydrochloride has been studied. An intensive investigation has been carried out under varying conditions. Since benzoylacetone is not soluble in water, it does not read with ...
Potable Water Quality Characteristics of the Urban Areas of Peshawar (Pakistan) Part 1: Tubewell Water.

AZIZ-UR-RAHMAN; A.R.KHAN (Karachi: Journal of the Chemical Society Of Pakistan., 2000-09-20)

Potable Water quality of the urban areas of Peshawar was monitored for various physical and chemical parameters. The importance of this reference data, related to the water quality of Peshawar was felt after spreading of ...
A Semi-Empirical Study of (B3H3N3H3)Cr(CO)3

F.O'BRIEN, JAMES; HAWORTH, DANIEL T. (Karachi: International Centre for Chemical and Biological Sciences, H.E.J. Research Institute of Chemistry, University of Karachi, 2000-09-03)

A semi-empirical molecular orbital calculation at the PM3 level has been done on the berazine chromium carbonyl complex, (B3H3N3H3) Cr(CO)3. The results of our calculation show that the B3N3 ring atom of benzine favour a ...
A Simple Method for Isothermal Titration Calorimetric Data Analysis.

A.A. SABOURY (Karachi: Journal of the Chemical Society Of Pakistan., 2000-09-20)

A Simple method was introduced for isothermal titration calorimetric data analysis. This method was applied to the binding of monosaccharide methy1 α-D-mannopyranoside to concavalin A at pH 6.9 and temprature of 25°C. The ...
Some Metal(II) Chelates of Ni(II), Cu(II) and Zn(II) with Thiazole Derived Schiff-Base Ligand: Their Synthesis, Characterization and Role of Anions (NO3," SO42-C2042" and CH3CO2) on Their Antibacterial Properties.

ZAHID H. CHOHAN; M. PRAVEEN (Karachi: International Centre for Chemical and Biological Sciences, H.E.J. Research Institute of Chemistry, University of Karachi, 2000-09-03)

A number of biologically: active nickel (ll),copper(ll) and zinc(1I) chelates with a novel thiazole derived salicylaldehyde having the same meta1 ion but different anions, e.g., nitrate. sulfate, oxalate and acetate. have ...
Synthesis, Characterization and Antibacterial Activity of Binuclear Complexes of Chiral Schiff Base 2,6-Bis (1S, 2R-2-Hydroxy-l-Methyl 2- Ph enylethylim in o)-4-Heptanone

NASIR AHMAD; NASIR IQBAL; CHRISTY MUNIR (Karachi: International Centre for Chemical and Biological Sciences, H.E.J. Research Institute of Chemistry, University of Karachi, 2000-09-06)

Binuclear complexes of VO(IV), Cr(1I), Co(II), and Cu(lI) with the title ligand were synthesized and characterized by elemental analysis and infrared spectra. The metal ions occupy the ONONO coordination sites of the ligand ...
Two New Hydroquinone Derivatives from Two Sponge Species of the Aegean Sea I ILKAY ERDOGEN, 2JUN'ICHI TANAKA, 2TATSUO RIGA, 'BILGE SENER

ILKAY ERDOGEN; JUN'ICHI TANAKA; TATSUO RIGA; BILGE SENER (Karachi: International Centre for Chemical and Biological Sciences, H.E.J. Research Institute of Chemistry, University of Karachi, 2000-09-06)

From two sponge species (Spongia and Ircinia) of the Aegean Sea two new octaprenylated hydroquinone, 1,4,44-trihydroxy-2-octaprenylbenzene (1) and 4-hydroxy-3oclaprenylbenzoic acid (2) were isolated together with eleven ...
Uptake of Copper, Cadmium and their Mixture in Artemia Sp. under Controlled Laboratory Conditions

A.B. MUNSHI; KHAULA SHIRIN; S.G.A. SHAH; RABIA ZUBERI (Karachi: International Centre for Chemical and Biological Sciences, H.E.J. Research Institute of Chemistry, University of Karachi, 2000-09-09)

The uptake of metal s and median lethal concentration( LC50) of Artemia sp. exposed to Cu, Cd and their mixture in static tests for a definite period of exposure was determined . The LC50 of copper was at 1000mg/L and ...
Using of 4-(4"-Methylbenzylidene)-1-Hydroxy-2-(N-Phthalimidomethyl)-5- Imidazolone as A Building Block in Synthesis of Some Heterocyclic

S.A. NASSAR (Karachi: International Centre for Chemical and Biological Sciences, H.E.J. Research Institute of Chemistry, University of Karachi, 2000-09-11)

4{4'·Mcthylbenzylidene)-1-hydroxy-2-(N-phthalimidomethyl)-5-imidazolone (2) is now newly synthesized. The interaction of 2 with aromatic amines, hydrazines, and aromatic: substrates under Friedel-Craft's, conditions were ...

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