CJ-VOLUME 01 ISSUE 01 NOVEMBER 2011


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Chemistry Journal  (CJ)                                               ISSN 2049-954X

Volume 01 No.01 November 2011 (Pages 1-36)

S. No.

Title

1

Physicochemical Studies of Resin Derived from p-Hydroxybenzoic Acid, Diaminobenzoic Acid with Formaldehyde and its Electrical Conductivity Study

2

DFT Study of Interactions of Carbenes with Boron Nitride Nanotubes

3

Microwave-assisted Efficient Synthesis of Chalcones as Probes for Antimicrobial Activities

4

Natural Adsorbents for Dye Effluent of High Strength COD and their Microbiological Analysis





Title

Physicochemical Studies of Resins Derived From p-Hydroxybenzoic Acid, Diaminobenzoic Acid with Formaldehyde and its Electrical Conductivity Study

Author(s)

Dhantaj T. Masram , K.P.Kariya and N.S.Bhave 


Abstract

The resin p-hydroxybenzoic acid- diaminobenzoic acid -formaldehyde (pHDBF) was synthesized by the polycondensation of p - hydroxybenzoic acid and diaminobenzoic acid with formaldehyde in the presence of a hydrochloric acid catalyst with molar proportion 1:1:2.The purity of newly synthesized resin has been tested and confirmed by thin layer chromatography (TLC) technique. Resin was characterized by elemental analysis, infrared (IR) spectroscopy, nuclear magnetic resonance (NMR) spectroscopy and UV- Visible spectral studies. The number average molecular weight of the resin was determined by non-aqueous conductometric titration. Viscometric measurements in Dimethylformamide (DMF) have been carried out in order to ascertain the characteristics functions and constants of pHDBF resin. Electrical conductivity measurements have been carried out to ascertain the semiconducting nature of the resin.

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Title

DFT Study of Interactions of Carbenes with Boron Nitride Nanotubes

Author(s)

Rita Kakkar and Smriti Sharma


Abstract

Single-walled boron nitride nanotubes are chosen as model reactants, and (10,0) and (6,6) are chosen as representatives of armchair and zigzag nanotubes, respectively, to study the interaction of carbenes of the type :CX2.  It is found that, contrary to the case of carbon nanotubes, boron nitride tubes, particularly armchair BNNTs, do not show a propensity for cyclopropane ring formation. The SWBNNT (10,0) system with :CH2 forms an insertion product. Mulliken population analysis is also done to ascertain the charge distribution in the final product and to emphasize the effect of electronegativity on the functionalizations. The band gaps are also analysed and it is noted that the sidewall functionalisations by carbenes have a profound effect on the electronic properties of boron nitride nanotubes. The carbene adopts a triplet state for zigzag BNNTs, but remains in the singlet state for the armchair BNNTs. The bandgap is found to decrease with increasing tube diameter.

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Title

Microwave-assisted Efficient Synthesis of Chalcones as Probes for Antimicrobial Activities

Author(s)

M. M. H. Bhuiyan, M. I. Hossain, M. M. Mahmud and Mohammad Al-Amin


Abstract

A series of chalcones (1-9) were prepared by Claisen-Schmidt condensation of methyl ketones with several aromatic aldehydes in presence of aqueous solution of sodium hydroxide using microwave irradiations. The reaction is clean with shorter reaction time, mild reaction condition, eco-friendly, excellent yield as compared to conventional methods and reduces the use of volatile organic compounds (VOCs). Variety of functional groups such as nitro, chloro, amino and ether survived under the reaction conditions. The structures of the novel synthesised chalcones have been established on the basis of their IR, NMR spectral data and elemental analyses. These compounds were screened for their antibacterial activities against five pathogenic organisms: Pseudomonas aeruginosa, Staphylococcus aureus (ATCC 6538), Vibrio choloriae, Shigella dysenteriae (AE 14396) and Salmonella typhi (AE 14612 (Table. 1) and antifungal activity against three organisms: Aspargilllus flavus, Saccharomyces cerevisiae and Candida albicans (Table. 2) using disc diffusion method and poisoned-food technique respectively. Some of them were found to possess significant activity, when compared to standard drugs.

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Title

Natural Adsorbents for Dye Effluent of High Strength COD And Their Microbiological Analysis

Author(s)

Shishir Kanti Pramanik, Mohammad Abdullah-Al-Shoeb, Abu Ali Ibn Sina, Mohammad Julhas Uddin, Dr. Suvomay Datta and Mohammad Abbas Uddin


Abstract

A study was carried out to examine the removal of dye and pathogenic bacteria from textile dye effluent by different adsorbents such as water hyacinth, tuberose pulp, sugarcane pulp and coconut pulp.  The study shows that most of the adsorbents were active in removal of dye from the dye effluent. Especially, the efficiency of water hyacinth for dye removal was satisfactory. The COD values in all samples were higher than the recommended value. In microbiological analysis, viable bacteria (TVBC) were found in all samples. The lowest count was 3x106 whereas the highest count was 6x106. Fecal Coliform (TFCC) and Total Coliform were not found in any sample. The lowest count was 0 and the highest count was 5x105. No value of TCC and TFCC was found in any sample, treated by water hyacinth. The experimental results suggested that water hyacinth was found suitable adsorbent on the basis of removal dye and harmful pathogenic bacteria.

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