Department of Chemistry, Science FacultyIslamic Azad University,Arak Branch Arak Iran

Email:- m-sadeghi@iau-arak.ac.ir

In this study, a series of highly swelling hydrogels bassed on sodium alginate (NaAlg) and polyN-Isopropylacrylamide (PNIPAAm) was prepared via a free radical polymerization method. The graft copolymezation reaction was carried out in a homogeneous medium and in the presence of ammonium persulfate (APS) as an initiator and N,N'- methylene bisacrylamide (MBA) as a crosslinker. A proposed mechanism for hydrogel formation was suggested and the structure of the product was established usingFTIR spectroscopy, Absorbency in various aqueous salt solution indicated and the swelling capacity deceased with an increase in the ionic strength of the swelling medium. This behavior can be attributed to charge screening effect for monovalent cations, as well as ionic crosslinking for multivalent cations. However, due to the high swelling capacity in the solutions, the hydrogels may be referred to as antisalt superabsorbents, Meanwhile, the overall activation enegy for the crosslinking reaction between Alg polysaccharrides was estimated to be 18.9kj/mol.

¹Department of Chemistry, L.N. Mahavidyalaya Korua, Kendrapara Orissa India

²Department of Physics,  L.N. Mahavidyalaya Korua, Kendrapara Orissa India

³P.G. Department of Chemistry G.M. (Aotu) College sambalpur Orissa India

⁴P.G. Department of Physics, F.M. University Balasore Orissa India

⁵Department of Chemistry, Ravenshaw University, Cuttack Orissa India

The ion-solvent interaction of CdCl₂ and CdBr₂ in Mathenol++ Water, Ethanot +water, Dioxane +water and Glycol+ water  obtaied from conductance have been compared at 10, 20 and 30%(w/w) soventcomposition within the temperature range 30°,35°, and 40° C. The K (dissociation constant)  delta G°_t (change in free energy transfer) delta G°_t (el) (change in free energy transfer due to electrical contribution) and G°_t  (ch) (change in free energy tranfer due to chemical equilibrium) have been calculated and ion-solvent interactions are interred

*Arts Com and Science College Yawal India

¹Shri. V.S. Naik College Raver India

²Pratap College, Amalner India

The interaction of Gd (III) and Dy(III) metal ion with Stanazolol (Ligand 1), Naloxone (Ligand 2), Raloxifen(Ligand 3), Ergotamine (Ligand 4) and Rutin (Ligand 5) have been instigated by ph metric titrationat 0.1 M ionic strength at room temperatur in 70% THF- Water mixture. The data obtained use to estimate the values of proton-ligand stability constant (P^k) and Metal-ligand stability contant (LogK). It is observed that lanthanide ion form form 1:1, 1:2 complexes with al five heterocyclic compounds.

¹Department of Chemistry, T John Institute of Technology, Bangalore India

²Department of Chemistry, St Josephs college, Bangalore  India

³Department of Chemistry, Auden Technology and management Academy, Bangalore India

⁴Department of Chemistry, Don Bosco Institute of Technology ,Bangalore India

 The present investigation aims to evaluate the corrosion control properties of metal matrix composites in comparison with matrix alloy using different concentration of Sodium chloride solutions and potentiodynamic polarization techniques. Matrix alloy used in AL6061 and the reinforcement used was quartz particulates of size 50-80 microns. Composites are prepared by liquid melt metallurgy technique using vortex method. Quartz particulates reinforced varying from two to six percent by weight in steps of two percent under dry conditions. Specimens are prepared according to ASTM standards. Both composites and corresponding base alloys were subjected to identical test conditions to understand the influence of the reinforcement on alloy corrosion behaviour and effective corrosion control. Composites became less prone to corrosion and pit formation than the matrix alloy, which may be due to chemically inert quartz particles present in the metal matrix composites. On the other hand the test also reveals that corrosion resistance of both alloy and composites increase with increase in normality of the sodium chloride solution, which may be due to increasing concentration of hydrogen ions in the solution. Corrosion of alloys can be effectively controlled by converting them in to composites by the addition of inert materials like silica particulates. If any automobile parts like bearing are made using these composites corrosion control properties can be tailored so that they can be used effectively in wide area of application. 
 

¹Department of Chemistry, BK Birla Institute of Engineering and Technology Pilani, Jhunjhunu Rajasthan India

²Head Department of Chemistry, Agra College Agra UP India

Schiff bases are aldehyde- or ketone-like compounds in which the carbonyl group is replaced by an imine or azomethine group. They are widely used for industrial purposes and also exhibit a broad range of biological activities. This paper compiles examples of the most promising antimalarial, antibacterial, antifungal, and antiviral Schiff bases. An overview of synthetic methodologies used for the preparation of Schiff bases are also described.

¹Department of Chemistry, T John Institute of Technology, Bangalore India

²Department of Chemistry, St Josephs college, Bangalore  India

³Department of Chemistry, Auden Technology and management Academy, Bangalore India

⁴Department of Chemistry, Don Bosco Institute of Technology ,Bangalore India

 This paper deals with the high corrosion resistance developed by the metal matrix composites when compared with that of matrix alloy by open circuit potential test. Matrix selected is AL6061 and reinforcement selected is quartz particulates, which is a ceramic material. The composites are prepared using liquid melt metallurgy technique using vortex method. Metal matrix composites containing 2, 4 and 6 weight percentage of quartz are casted. Castings of composites and matrix are cut into rectangular specimen of 20mm x 20mm cylinders for weight loss test according to standard metallographic techniques. Microstructures of the specimens are taken. The corrodents used for the tests were 0.025, 0.05 and 0.1 molar sodium hydroxide solutions in which weight loss corrosion tests were conducted at room temperature. Effect of exposure time and presence of increased percentage of reinforcement red mud and concentration of the medium are discussed in detail. 
 

Department of Chemistry, Sagar Institute of Research and Technology Bhopal India

Email:-tiwarirkt85@yahoo.com 

Gastric acid is responsible for Peptic ulcer. PPIs are first generation drugs. Pantoprazole (PAN) is one of the important PPI drug. PPIs play important role to suppress the Gastric acid. Stepwise formation constant and corresponding values of free energy change of complexes of Pantoprazole (PAN an important antiulcer drug, with transition metal ions [Vo(II), Cu(II), Cd(II), Mn(II), Co(II) and Zn (II)] have been determined at 26ºC and 36ºC and 0.1M (NaNO₃) ionic strength. Probable structures of isolated chelates have been assigned on the basis of IR, NMR spectral data. Antibacterial activity of the complexes "In vivo" for sensitivity test has been screened. 
 

Govt M.H College of Home Science for Women Jabalpur India

 Owings to the enhanced utilization of organophosphates in certain species of bacteria and fungi, a new compound has been synthesized (4-Bromo Aniline Phosphoro Mono Amidate Barium salt), by using Phosphorylation method. The characterization of the compound is accompanied with the aid of elemental and IR analysis. The synthesized test compound is used for screening effect on some selected species of fungus and bacteria and its effectiveness against pathogens has been determined.

¹Department of Chemistry, P.M.B Gujarati College , Indore- India

2Department of Chemistry, R.J College Ghatkopar (W) Mumbai India

3Department of Chemistry, SNBT Juhu Road Mumbai India

4Department of Chemistry,S.J.H.H.S Innovative College Indore India

Email:- optimisticdinesh@gmail.com

The present communication deals with the identification of various sugars present in the roots of the plants Maesa indica Wall. Their presence was confirmed by paper chromatography using authentic samples¹. Carbohydrate contents were found to contain 2.3% reducing sugars and following sugars were found present D- galactose, D- mannose, D- glucose, D- fructose, maltose, L- rhamnose, and sucrose. 
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