B: Chemistry (148)
GJSFR: B
Kinetic Approach to the Reductionof Toluidine Blue by Dithionate Ion in Aqueous Acidic Medium
Published In: GJSFR Part: B: Chemistry Volume: 13 Issue: 8
The kinetics of redox reduction of Toluidine blue (hereafter referred to as TB+) by dithionate ion have been studied in acidic medium under pseudo-first order condition of excess [S2O6 2-] at 31± 1oC, [H+] = 1 x 10-2 mol dm-3, ionic strength (I) = 0.5 mol dm-3 (NaCl) and λ max 600 nm. The redox reaction displays a 1:1 stoichiometry and the reaction was found to be first or...
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Authors Babatunde O.A, Ajayi J.ORead Journal Click Here
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Page No. 21 to 30
Kinetic Approach to the Mechanism of Reduction of (7-Amino-8-Methyl-Phenothiazin-3-Ylidene)-Dimethyl-Ammonium Chloride by Thiocyanate Ion in Acidic Medium
Published In: GJSFR Part: B: Chemistry Volume: 13 Issue: 8
The kinetics of reduction of (7-Amino-8-methyl-phenothiazin-3-ylidene)-Dimethyl-Ammonium Chloride (hereafter referred to as TB) by thiocyanate ion have been studied in acidic medium under the pseudo-first order condition of excess [SCN-] at 30 ± 1°C, [H+] = 1 x 10-3 mol dm-3 and ionic strength, I = 0.50 mol dm-3 (NaCl). The stoichiometry of the reaction was observed to be...
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Authors Babatunde O. A, Nwaji M. URead Journal Click Here
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Page No. 1 to 7
A New Spectrophotometric Determination of Chromium (VI) As Cr2O72- After Cloud-Point Extraction using a Laboratory-Made Organic Reagent
Published In: GJSFR Part: B: Chemistry Volume: 13 Issue: 8
A new trend in extraction and preconcentration of chromium (VI) using laboratory-made azo dye reagent 2- [benzenethiazolylazo]-4-benzenenaphthol (BTABN) after cloud-point extraction (CPE) and its determination by spectrophotometrically. The method involved the reaction of Cr2O7 2- with BTABN in acidic medium forming a hydrophobic ion-association complex [HBTABN][HCr2O7] which is entrappe...
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Authors Zuhair A-A Khammas, Shawkat K. Jawad, Ibtehage R. AliRead Journal Click Here
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Page No. 9 to 19
Kinetics Studies and Mechanism Evolution of the Cyclization of Ethylene Diamine and Propylene Glycol over Alumina Supported Nanocrystalline Mn-Ferrite
Published In: GJSFR Part: B: Chemistry Volume: 13 Issue: 7
Kinetics of Cyclization of propylene glycol and ethylene diamine to 2-methyl pyrazine has been studied over alumina-supported nanocrystalline MnFe2O4 catalyst in a differential flow fixed bed reactor in the temperature range 473 – 573 K. The partial pressures of propylene glycol and ethylene diamine were varied and rates were measured for the formation of 2 Methyl Pyrazi...
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Authors Rajeev DixitRead Journal Click Here
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Page No. 29 to 35
Methylation of Aniline over Mn-Cu Ferrites Catalysts
Published In: GJSFR Part: B: Chemistry Volume: 13 Issue: 7
The structural and catalytic properties of the mixed spinel ferrite system Mn1-xCuxFe2O4 (x=0, 0.25, 0.5,0.75, 1.0) have been investigated by X-Ray diffraction, Mössbauer and catalytic activity measurements.The variation of lattice parameter, crystallite size, and Mössbauer parameters of the product formed with the variation in the concentration of Cu has been studied.XRD S...
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Authors Rajeev Dixit, P Gupta, Samidha Saxena, Reena DwivediRead Journal Click Here
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Page No. 43 to 50
Isolation and Characterization of a New Phytotoxic Molecule from Culture Fluids of Verticillium Dahliae
Published In: GJSFR Part: B: Chemistry Volume: 13 Issue: 7
The verticillium dahliae liquid culture was extracted with butanol. The BE was able to induce necrosis of cutting stem of olive tree at 40 µg/ml the same toxicity was obtained with acetone precipitate (AP) at 50 µg/ml. The CPG profile of the fraction obtained by purification of BE on preparative TLC showed the presence of two peaks. The identification of these two compoun...
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Authors Hassan Laouane, My Hassan Sedra, Hassan B. LazrekRead Journal Click Here
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Page No. 37 to 42
Sntheses and Applications of Pyrimidinethiones
Published In: GJSFR Part: B: Chemistry Volume: 13 Issue: 7
One important class of pyrimidine is pyrimidinethione, which are also well known as mercapto or thioxopyrimidine compounds. This review deals with the synthesis and applicaions of pyrimidinethiones ...
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Authors Mohamed Abdel-Megid, K.M. Elmahdy, Aymn E. RashadRead Journal Click Here
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Page No. 7 to 28
A Dispersive Liquid- Liquid Microextraction based Gas Chromatography - Mass Spectrometry (DLLME-GC-MS) Method for the Simultaneous Determination of Fungicide Residues in Fruit Samples
Published In: GJSFR Part: B: Chemistry Volume: 13 Issue: 6
A simple and sensitive dispersive liquid - liquid microextraction method based gas chromatography mass spectrometry (DLLME-GC-MS) has been developed for the simultaneous determination of twelve azole fungicides (Tetraconazole, Penconazole, Tricyclazole, Propiconazole, Tebuconazole, Epoxyconazole, Etoxazole, Fluquinconazole, Difenconazole) in fruit samples. The following parameters that a...
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Authors Thammisetty Venkata Rao, Gundoju Suresh, Atmakuru RameshRead Journal Click Here
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Page No. 55 to 60
Kinetics ofNonbranched-Chain Processes of the Free-Radical Addition with Reactions, inwhich the 1:1 Adduct Radicals Compete for Interaction with Saturated and Unsaturated Components of the Binary Reaction System
Published In: GJSFR Part: B: Chemistry Volume: 13 Issue: 6
Five reaction schemes are suggested for the initiated nonbranched-chain addition of free radicals to the multiple bonds of the unsaturated compounds. The proposed schemes include the reaction competing with chain propagation reactions through a reactive free radical. The chain evolution stage in these schemes involves three or four types of free radicals. One of them is relatively low-re...
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Authors Michael M. SilaevRead Journal Click Here
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Page No. 31 to 53
Clove (Eugenia Caryophyllata) Extraction and Synthesis of New Pyrazole Derivatives from Eugenol
Published In: GJSFR Part: B: Chemistry Volume: 13 Issue: 7
An efficient method for the preparation of novel 1,3,4-trisubstituted 4,5-dihydro-1H-pyrazoles via 1,3-dipolar cycloaddition has been described. Using this method, various pyrazole were synthesized from eugenol, a major phenolic constituent of clove bud essential oil, as dipolarophilic system and N-aryl-C-ethoxycarbonitrilimine: the (Z)-ethyl 2-bromo-2-(2-(4-chlorophenyl)-hydrazono)aceta...
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Authors S. Hamri, K. Rhazri, A. Hafid, H. Ouchetto, Y.Hajbi, M. KhouiliRead Journal Click Here
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Page No. 1 to 6
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Removal of Ni, Cu and Zn from a Contaminated Soil using Different Brassica Species
Published In: GJSFR Part: B: Chemistry Volume: 13 Issue: 6
The remediation of heavy metal (Ni, Cu and Zn) in contaminated soil by different Barley and Brassica nigra (IC - 247)]. Species of Barley and Brassica were grown in contaminated soil and after washing with tap water [seed was collected from Krishi Anusandhan Bhavan Pusa Delhi]. The soil were mixed different amendment [FYM, ssp, CaCO3 and FYM+CaCO3]. and metal was applied at the rate of 0...
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Authors Sumedha Chauhan, S. S. YadavRead Journal Click Here
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Page No. 27 to 29
Effect of Cadmium ion on Adsorption-Desorption Behavior of Simazine on Agricultural Soils
Published In: GJSFR Part: B: Chemistry Volume: 13 Issue: 6
The effect of cadmium (Cd) on adsorptiondesorption behavior of Simazine [2-chloro-4, 6 bis (ethylamine)-1,3,5-triazine] which is anionic herbicide were investigated at three different temperature 10, 25 and 40 ±1˚C on six agricultural soil samples which has different texture. The first order rate law was most fitted with the best correlation factor, the Linear, Freundlich...
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Authors Rounak M. Shariff, Media A. HassanRead Journal Click Here
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Page No. 61 to 71
Synthesis, Characterization and Biological Activities of Cu(II), Ni(II), Zn(II), Cd(II), Sn(II), Co(II),Sb(III) and Fe(III) Complexes with Schiff base Methyl 3-[(E,E)-3-phenylprop-2-enylidene]dithiocarbazate
Published In: GJSFR Part: B: Chemistry Volume: 13 Issue: 6
The Complexes of Cu(II), Ni(II)), Zn(II), Cd(II), Sn(II), Co(II), Sb(III) and Fe(III) with Methyl 3-[(E,E)-3-phenylprop-2- enylidene]dithiocarbazate have been synthesized and characterized by elemental analysis, molar conductance, magnetic susceptibility, FT-IR, UV-Visible spectroscopy. The Schiff bases in every case behaved as bidentate, uninegative ligands. The complexes of Cu(II), Co(...
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Authors Sultana Shakila KhanRead Journal Click Here
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Page No. 15 to 26
Growth Curves of Filamentous Fungi for Utilization in Biocatalytic Reduction of Cyclohexanones
Published In: GJSFR Part: B: Chemistry Volume: 13 Issue: 5
The growth of filamentous fungal mass in malt extract culture was recorded over 10 days at 32 oC, with the aim of utilizing the mycelium for the biocatalytic reduction of cyclohexanones 1-3. Growth curves were obtained for marine fungi (Aspergillus sydowii CBMAI 933, Penicillium miczynskii CBMAI 930 and Trichoderma sp. CBMAI 932) and terrestrial fungi (Rhizopus sp. Cs1 and Aspergillus sp...
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Authors Gliseida Zelayaru00c3u00a1n Melgar, Francisca Vanessa Souza De Assis, Lenilson Coutinho Da Rocha, Silmara Cristina Fanti,Lara Duru00c3u00a3es Sette, Andru00c3u00a9 Luiz MeleiRead Journal Click Here
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Page No. 13 to 19
