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ISSN 0974-1496

Publications in this journal

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    ABSTRACT: The present study of Calcein as complexing agent for simultaneous determination of Cu(II), Pb(II) and Cd(II) by Cathodic Adsorptive Stripping Voltammetry had been conducted. This method based on adsorptive accumulation of Cu(II)-Calcein, Pb(II)-Calcein, and Cd(II)-Calcein complexes onto hanging mercury drop electrode (HMDE). Followed by reduction of adsorptive species onto work electrode. The Optimum conditions were achieved at calcein concentration 6 mM, pH 5, accumulation time 50 seconds and accumulation potential -0.7V. This method has been applied to determine Cu(II), Pb(II) and Cd(II) in tap water, river and sea water. Concentration of metal ion in tap water was obtained Cu(II) 226.12μg/L, Pb(II)8.84 μg/L, while Cd(II) undetected. For river was obtained Cu(II) 119.10μg/L, Pb(II) 6.65 μg/L, Cd(II) 33.67 μg/L and for sea water was obtained Cu(II) 804.63 μg/L, Pb(II) 80.86μg/L while Cd(II) undetected. Relative standard deviation was obtained Cu(II) 0.53%, Pb(II) 3.16% and Cd(II) 7.69% and recovery was obtained Cu(II) 99.97%, Pb(II) 96.68% and Cd(II) 99.31%.
    Rasayan Journal of Chemistry 07/2015; 8(3):362-372.

  • Rasayan Journal of Chemistry 07/2015;
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    ABSTRACT: In modern aspects, the heterocyclic ring systems are playing a very important role in pharmaceutical drug synthesis. The present study was aimed to synthesis and evaluates the pharmacological potential of heterocyclic compound such as chromium (VI) compound. Microbiological potential of the prepared compound quinoxalinium dichromate (QxDC) was evaluated by disc diffusion method. Based on the results, we found that compound QxDC having significant potential against the selected organisms. The spectral characterization also revealed that the synthesized compound has heterocyclic ring system.
    Rasayan Journal of Chemistry 07/2015; 8(3):298-302.
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    ABSTRACT: A new simple, selective, accurate, rapid, stability indicating High Performance Liquid Chromatographic (HPLC) method was developed and validated for the analysis of such a combination of losartan potassium, glimepiride and metformin. Chromatographic separation was achieved isocratically on C18 column [PRINCETON SPHER – 100, (100 A0- 5μm, 150 mm x 4.6 i.d.).] utilizing a mobile phase composition of 10 mM disodium hydrogen phosphate and 10 mM sodium dodecyl sulphate buffer and acetonitrile (68:32, v/v), with a pH of 7.5 (adjusted with orthophosphoric acid) at a flow rate of 1.0 mL/min, with UV detection at 230 nm. The calibration graphs were linear with r2 >0.999 and % RSD> 3 for intra-day and inter-day precision. The retention time of losartan, glimepiride and metformin was 1.39, 4.27, 9.36 min., respectively. The limit of detection and limit of quantitation for losartan, glimepiride and metformin was 0.0382, 0.00473, 0.09331 and 0.1273, 0.0157, 0.31104 respectively. The drugs were subjected to various stress conditions, as per ICH guidelines. The stability indicating studies showed that neither the degradation products nor the excipients interfered in the estimation of drugs. Hence, this method was specific and can be successfully used for the estimation of these drugs in combined dosage forms.
    Rasayan Journal of Chemistry 07/2015; 8(3):287-297.
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    ABSTRACT: Experimental and theoretical ultrasonic velocity of the binary mixtures of alcohols with carbon tetrachloride systems have been find at 303K, The following theoretical methods such as, Nomotos relation, Van Dael relations, Impedance relations, Junjies relation, Impedance relations, Rao relations are used to calculate the theoretical ultrasonic velocity. Theoretical values are compared with experimental values to find the merits of the relations and check the validity of theses theoretical models by using percentage error and average percentage deviations. The results are discussed in terms of inter molecular interactions occurring in the systems. © 2015, Rasayan Journal of Chemistry, c/o Dr. Pratima Sharma. All rights reserved.
    Rasayan Journal of Chemistry 04/2015; 8(2):227-231.
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    ABSTRACT: In present research; we tried to confirm 2-phenyl Quinazolin-4(3H)-one derivatives, which are broadly reported in the literature as scavenging agent. The study was carried out on a selected set of 40 novel 2-phenyl quinazoline- 4(3H)-one and consequently docked them into Scavenger receptor class B Type- I (SRCB 1). The analogues 7a-7a8 and 7b1-7b8 were found to be more potent inhibitor as they exhibit drug like activity. The entire test Compounds which have highest ligand energy compared to the Standard compounds. Structure based drug designing of these analogues may found a novel antioxidant for future study. © 2015, Rasayan Journal of Chemistry, c/o Dr. Pratima Sharma. All rights reserved.
    Rasayan Journal of Chemistry 04/2015; 8(2):237-250.
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    ABSTRACT: Natural products are the most important sources of drugs that protects from various biological oxidants. That’s why they are discovering as antioxidants. Antioxidants are known as the first line defence against free radical damage. Synthetic antioxidant such as BHT and BHA were reported as a toxic compound for human cells. Thus there is a need for non-toxic herbal compounds. The present work was carried out to study in vitro antioxidant activity of isolated compound from methanolic stem extracts of Jasminum auriculatum. Different concentration of isolated compound was subjected to antioxidant activity by DPPH free radical scavenging.
    Rasayan Journal of Chemistry 04/2015; 8(2):161-163.
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    ABSTRACT: A Facile route has been developed to afford N,N- Dimethyl para phenylene diamine dihydrochloride (NNPPDA) under high pressure condition using N,N-Dimethyl amine HCl and 4-Chloro Nitrobenzene in DMF/NaHCO3 system followed by Raney nickel reduction and hydrochloride salt formation. This scalable and economical process ends up with 99% isolated yield on kilo scale.
    Rasayan Journal of Chemistry 04/2015; 8(2):164-166.
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    ABSTRACT: Polyethyleneimine is being increasingly applied for immobilizing enzymes employing its primary, secondary and tertiary ionisable amino groups. In this study, we attempt to immobilize pepsin on Sepabeads functionalized with Polyethyleneimine (PEI) polymers of varying molecular sizes (Mw 600, 1200, 10,000 gmol−1). The stability and activity of pepsin bound to PEI was found to be dependent on PEI molecular weight and also on the ionic strength of medium, used for immobilization and protein hydrolysis. Immobilized pepsin exhibited good storage and operational stability which was investigated for generating F (ab’)2fragments from hydrolysis of immunoglobulins. Digestion of IgG by soluble pepsin and immobilized pepsin showed the same electrophoresis profile (of F (ab')2 and Fc fragments) indicating no modification in pepsin specificity after immobilization on PEI activated Sepabeads support. The above method of immobilization presents an efficient means to immobilize pepsin onto a solid support wherein the said preparation would be free from autolysis and can be reused for multiple cycles.
    Rasayan Journal of Chemistry 04/2015; 8(2):186-193.
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    ABSTRACT: 3-hydroxybenzofuran-2-carbohydrazide undergoes facile condensation with aromatic aldehydes to afford the corresponding N-arylidene-3-hydroxybenzofuran-2-carbohydrazide (3a-f) in good yields. On heterocyclization reactions of compounds (3a-f) with succinic anhydride gave the desired products 1-(3-hydroxybenzofuran-2- carboxamido)-5-oxo-2-phenylpyrrolidine-3-carboxylic acid (4a-f). The structures of these compounds were established on the basis of analytical and spectral data. All the newly synthesized compounds were evaluated for their antibacterial and antifungal activities.
    Rasayan Journal of Chemistry 04/2015; 8(2):207-212.
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    ABSTRACT: Solvent free synthesis of substituted Coumarins by Von Pechmann condensation of phenols with β-ketoesters catalyzed by Zn [(L)-Proline]2as an organometallic catalyst by microwave irradiation method. Our present protocol is economical and clean comprise of green reagent, solvent and catalyst.
    Rasayan Journal of Chemistry 04/2015; 8(2):194-197.
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    ABSTRACT: Contamination of roadside soil and farmland with heavy metals due to traffic activities is an environmental hazard causing pollution, thereby affecting the eco-system. The present study is aimed to determine the impact of vehicular activity on soil and farmlands abetting the National highway 4 from Nelamangala to Dabaspet in the periphery of Bangalore city with contrasting traffic densities. The concentrations of heavy metals Titanium, Manganese, Iron, Zinc, Strontium and Zirconium across the highway were determined and the status of soil health due to traffic activity is presented. © 2015, Rasayan Journal of Chemistry, c/o Dr. Pratima Sharma. All rights reserved.
    Rasayan Journal of Chemistry 04/2015; 8(2):232-236.
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    ABSTRACT: Research on dye sensitized solar cells is of recent attraction to the researchers and academicians in the present scenario. Dye sensitized solar cells are a viable alternative to the conventional silicon based photovoltaic devices due to their remarkable conversion efficiencies. Photosensitizer is an essential component in this novel technology in order to enhance the overall conversion efficiency of a dye sensitized solar cell. In this work, we have extracted the natural dye from Techoma Stans flower and the ethanolic extract was further subjected to characterization studies to understand the nature of the dye and to find its suitability for dye sensitized solar cell application. © 2015, Rasayan Journal of Chemistry, c/o Dr. Pratima Sharma. All rights reserved.
    Rasayan Journal of Chemistry 04/2015; 8(2):251-254.
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    ABSTRACT: Polarographic studies of Ni (II) - 3-hydroxy-3-phenyl-1-(dichloro phenyl)triazene (HPDCT) complex has been done in aqueous medium. It is observed that Ni (II) forms 1:2 complexes with HPDCT and the electrochemical reduction of the complex is diffusion controlled in nature between pH 6.5 to 7. Well defined waves are obtained and the E1/2 shifts to more negative side with the addition of HPDCT. The log β value have been calculated using Lingane method and a 2 electron reduction mechanism is proposed. The present studies are first attempt to study electro chemical behavior of Ni(II)-3-hydroxy-3-phenyl-1-(dichloro phenyl) triazene complex.
    Rasayan Journal of Chemistry 04/2015; 8(2):172-175.
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    ABSTRACT: Benzimidazole derivatives plays important role in medical field with so many pharmacological activities such as antimicrobial, antiviral, antidiabetic, anticancer, activity. Various2-substituted benzimidazole derivatives in moderate to good yield have been prepared in one-spot reaction by condensation of o-phenylenediamine and different aromatic acid in the presence of ammonium chloride as catalyst at 80-90°C. The reaction is green and economically viable.
    Rasayan Journal of Chemistry 04/2015; 8(2):213-217.