Volume-1 ~ Issue-2

Abstract : HIPS was blended with starch in three formulations 10, 20 & 30% with compatibilizer glycerol (2wt% based on starch) using a twin screw extruder. Test specimens were prepared using an injection molding machine. Mechanical, electrical, physical and thermal properties were determined. Photo degradation using accelerated weather o meter for 25, 50, 100, 200 hrs was carried out. And then bio degradation for 45 days was carried out. The loss in mechanical properties was studied after photo degradation. After photo degradation, bio degradation was evaluated. The effect of starch on bio degradation was studied. HIPS is photo degradable and starch is bio degradable. Hence starch filled HIPS is photo & bio degradable. This photo & bio degradable starch filled HIPS is used in packaging & disposable applications like cups, lids, trays, spoons, pens & cutlery handles with lower cost.
Keywords: HIPS, starch, Mechanical properties, photo degradation, bio degradation

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Abstract: A study in terms of proximate, elemental and fatty acid contents of (Hura crepitans) seed was investigated using standard analytical techniques. The results of proximate composition in % were as follows: moisture 12.82 ± 0.01, crude protein 24.76 ±0.04, crude fibre 10.15 ± 0.03, fat 10.68 ± 0.01, ash 3.16 ± 0.02 and carbohydrate 34.75 ± 0.05. The elemental composition of the seed showed Na, K, Ca and Mg in mg/100g to be 6.00 ± 0.01, 123.00 ± 0.02, 10.40 ± 0.03, 112.00 ± 0.01 respectively while other elements determined in mg/kg were Fe and Zn with 7.10 ±0.04 and 2.60± 0.01. The (%) free fatty acid compositions of the seed oil were as follows: lauric (1.310 ±0.015), palmitic (0.389 ±0.012), palmitoleic (1.211 ±0.013), stearic (2.436 ± 0.004), oleic (6.138 ±0.003), linoleic (8.625 ±0.001) and linolenic (2.469 ± 0.102). The results revealed linoleic and oleic acids to be the most common in terms of abundance while palmitic acid was the least. The seed of Hura crepitans could be described as a good food because it contained significant amount of essential nutrients required by man.
Keywords: Proximate, elemental, fatty acid, Hura crepitans, seed-oil.

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Abstract: Nanocrystalline ceria (CeO2) was prepared by solution combustion method using cerium nitrate as oxidizer and citric acid as fuel. The as-formed CeO2 nanopowder was characterized by Powder X-ray diffraction, Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The nanoparticles were found to be agglomerated, fluffy and porous with a mean crystallite size of about 20 nm. The as-formed ceria nanopowder was used for the removal of chemical oxygen demand (COD) of an industrial effluent. The effect of various factors such as pH, dosage of nanopowder, stirring time and sedimentation time was studied. It was found that more than 89% removal of COD could be achieved at a pH of 4, for a catalyst dosage of 0.8g of the nanopowder per liter of the industrial effluent with a sedimentation time of about 80 minutes.
Key Words: Ceria, Solution combustion, Scanning electron microscopy, Chemical oxygen demand.

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Abstract : Ionic liquid [Et3NH][HSO4] was found to be a particularly efficient catalyst for the synthesis of β- amino carbonyl pyrimidines through the Mannich condensation reaction of substituted pyrimidin-2(1H)-ones, cyclohexanone and 4-fluro/chlorobenzaldehyde under ultrasonic irradiation at room temperature. The present methodology offers several advantages such as excellent yields, simple procedure and mild conditions.
Keywords: Pyrimidine, Ionic Liquid, Mannich Reaction, Ultrasound, Green chemistry

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Abstract: In the present study, a successful attempt has been made to develop a simple method for the simultaneous determination of manganese (II) and iron (III) in an industrial effluent using differential pulse polarography (DPP) technique. Quantification of manganese (II) and iron (III) was done in Triethanolamine and KOH as a supporting electrolyte. The polarogram recorded for the industrial effluent in triethanolamine and KOH showed two peaks at -0.3V and 0.82V vs. saturated calomel electrode which were confirmed to be of manganese (II) and iron (III) respectively by the method of standard addition. The linear working range for manganese (II) and iron (III) both was 1.408 μg/mL to 4.977 μg/mL. The proposed method was found to be simple, precise, and accurate and can be successfully applied for the analysis and simultaneous determination of manganese (II) and iron (III) in industrial effluents.
Keywords: Differential pulse polarography, Industrial effluent, Iron (III), Manganese (II), Potassium hydroxide, Triethanolamine,

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Abstract: Two new, selective and sensitive visible spectrophotometric methods (method A and B) have been developed for the estimation of Tenofovir disoproxil fumaratein bulk and in pharmaceutical preparations. Method 'A' is based on the reaction with wool fast blue, in the presence of buffer at PH 1.5 to form a colored species with a λmax 590nm. Method B is based on the reaction with tropaeoline -00 dye under acidic condition with a λ max 410nm. Beer's law is obeyed in the concentration range of 50 to 250μg/ml for both the methods. The methods were extended to pharmaceutical formulations and there was no interference form any common pharmaceutical excepients and diluents. The result of analysis has been validated statistically and by recovery studies.
Keywords: Spectrophotometric determination Wool fast blue, tropaeline-00, Tenofovir disoproxil fumarate

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Abstract: The determination of cadmium in rice by radiochemical displacement is the main objective of the present work. Cadmium was preconcentrated and separated from coexisting ions by anion exchange resin. Optimum absorption and elution condition were studied. The absorption of cadmium on the resin was obtained by using 2 M HCl. The eluting condition of cadmium was using 8 M ammonia solution with the eluting efficiency of 96 %. Cd enriched was then analyzed by the displacement of labeled Zn from Zn : PAN complex. The detection limit was 6 g kg-1 (n = 5)

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Abstract: A novel calix[4]arene based chemosensor having two schiff's base units has been designed, synthesized and characterized by NMR and ESI-MS analysis. It is found to exhibit excellent selectivity for Cu2+ over a wide range of alkali, alkaline earth and other transition metal ions in acetonitrile solution. Its metal binding affinity and binding constant studies revealed a 1:1 binding stocheometry of the ligand with Cu2+ ion.
Keywords: calix[4]arene, chemosensor, Cu2+, recognition, schiff's base

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Abstract: m-hydroxy benzyl ethylene diamine synthesized by the author in the laboratory has been successfully used as a reagent to form complex with chromium metal in water samples. The estimation of chromium present in various water samples has been carried out by spectrophotometry. Other parameters like effect of pH, reagent concentration, choice of solvent, effect of interference ions has been studied. . This method is simple, sensitive and accuracy comparable with other existing extractive spectrophotometric methods for the determination of Chromium in various water samples.
Keywords:Chromium,m-hydroxybenzylethylenediamine,watersamples

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