B: Chemistry

B: Chemistry (148)

GJSFR: B

This paper discusses in detail the calculation of bond lengths of organic molecules in the solid state. It describes briefly the effect of electronegativity in covalent bond length. A set of single bond covalent radii and electronegativity values are proposed. Covalent bond lengths calculated by a modified form of the soft sphere equation (which calculated internuclear separation of diff...
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Authors Peter F. Lang, Barry C. Smith
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Page No. 55 to 60

This research focuses on the synthesis of metalcontainin gmesoporous silica for catalytic esterification of benzyl alcohol with acetic acid. In this study Zr-containing MCM-41 with different molar ratios of Si/Zr were synthesized successfully. It is observed that the structural ordering of Zr- MCM-41varies with the Si/Zr ratio, and highly ordered mesoporous molecular sieves could be obta...
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Authors Mehdi Erfani Jazi & Thualfeqar G Mohammed
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Page No. 31 to 39

In this approach electrode kinetics and mechanism of pesticides having different electro active centres at carbon nano tubes paste electrode was studied. Universal buffer used as supporting electrolyte and the techniques employed are cyclic voltammetry, differential pulse adsorptive stripping voltammetry, millicoulometry and controlled potential electrolysis. All investigations were made...
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Authors T. Raveendranath Babu, P. Sujana, S. Rajasekhar Reddy
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Page No. 41 to 45

The threshold breakdown of the through holes by power laser radiation of metallic foils is considered as response of metallic system to laser radiation. Binding experimentally determined response to the absolute temperature scale allows one to determine the value of the imaginary part of the generalized susceptibility depending on temperature, the critical temperature of the transition "...
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Authors Evgenii Kalashnikov, Aleksey Bugayev, Mikhail Kantor,
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Page No. 21 to 29

The manufacture of conventional polyurethanes include the use of isocyanates, which in turn require using toxic and hazardous phosgene. The safety devices are necessary to prepare these monomers. Therefore, the huge investment is inevitable for this process. Also, these monomers cannot be considered as environmentally friendly chemicals. The increasing global awareness for protection of ...
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Authors Mehdi Erfani Jazi, Thualfeqar G Mohammed, & Fatemeh Aghabozorgi
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Page No. 1 to 20

A rapid, sensitive and simple spectrophotometric procedure for the assay of the smaller amounts measures from sodium salicylate at pharmaceutical preparations (topical-solution) was examined. The procedure is focus on a diazotization and reaction coupling between sodium salicylate and diazotized para-amino benzoic acid in alkaline medium for the formation of an intensive bright yellow so...
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Authors Mohauman Mohammad Al-Rufaie
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Page No. 47 to 53

Two oleogum resin essential oils (from two different seasons: fall and summer), of Boswellia spp. (collected from Somalia), were obtained by hydrodistillation and analyzed by GC-MS. Out of 147 peaks, components were identified among the two essential oils accounting for 100%, and 99.7% of the oils, respectively. The two essential oils were dominated by the 1-methoxy alkane [octyl methyl ...
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Authors Prabodh Satyal, Robert S Pappas
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Page No. 1 to 9

The aim of this study was to characterize adult distribution with respect to light and analyze ovary contents in the four seasons of the year. The swimming behavior of Ciona intestinalis, Molgula manhattensis, Ascidella aspersa and Phallusia mammilata larvae against certain abiotic factors were commented. For the field data on adult distributions, one-way analysis of variance (ANOVA) was...
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Authors Gaber Ahmed Saad, Abdullah Bedeer Hussein
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The dissolution of polymers in solvents is an interest area of polymers science and technology due to their applications in films and membranes. The starting point for the preparation of polymer membranes by phase inversion is having a thermodynamically stable solution. In this work, the thermodynamic behavior of polyamide 66 (PA66) solutions in formic acid (FA) and in hydrochloric acid ...
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Authors Mara Zeni, Jocelei Duarte, Venina Dos Santos
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Page No. 11 to 18

The simultaneous analyses of NMP and DMAc in synthetic fibers that have been regulated recently due to their human hazard properties were studied by both a conventional GC-MS method and a thermal desorption(TD)-GC-MS method that uses Py-GC-MS instrument using the thermal desorption function. Method validation characteristics such as linearity, precision of peak area and retention time, l...
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Authors Kwang Seo Park, Moon Hwan Song, Young Dal Cho, Eun Kyung Choe
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Page No. 17 to 23

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