Volume-12 ~ Issue-2 ~ February-2019

Abstract: The effect of modified almond extract (MAE) as inhibitor for the corrosion of Q235 mild steel in 0.5 M H2SO4 was investigated using weight loss, electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (PDP) techniques. Scanning electron microscopy (SEM) analysis was employed as characterization technique. The results from EIS and weight loss techniques showed a good inhibition efficiency which increased with increase in extract concentration. Polarization results indicated MAE to be a mixed inhibitor in 0.5 M H2SO4 environment, having effect on both the anodic and cathodic partial reactions. MAE inhibits the corrosion of Q235 mild steel by an adsorption mechanism, which follows Freundlich adsorption isotherm. SEM analyses revealed that the corrosion process was retarded in the presence of inhibitor in the acid environment..

Keywords: Adsorption mechanism, characterization technique, corrosion inhibitor, mild steel, Modified almond extract.

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[2]. R. Saratha and V. G. Vasudha, Emblica Officinalis (Indian Gooseberry) leaves extract as corrosion inhibitor for mild steel in 1N HCL medium, E-Journal of Chemistry, 7(3), 2010, 677–684.
[3]. N. B. Iroha and M. A. Chidiebere, Evaluation of the Inhibitive Effect of Annona Muricata. L Leaves Extract on Low-Carbon Steel Corrosion in Acidic Media, International Journal of Materials and Chemistry, 7(3), 2017, 47-54.
[4]. N. Kumpawat, A. Chaturvedi and R. K. Upadhyay, A Comparative Study of Corrosion Inhibition Efficiency of Stem and Leaves Extract of Ocimum sanctum (Holy Basil) for Mild Steel in HCl Solution, Protection of Metals and Physical Chemistry of Surfaces, 46(2), 2010, 267-270.
[5]. N. B. Iroha and N. A. Madueke, Effect of Triumfetta rhomboidea Leaves Extract on the Corrosion Resistance of Carbon Steel in Acidic Environment, Chemical Science International Journal, 25(2), 2018, 1-9.

Abstract: In order to understand the kinetics and mechanistic paths adopted, we have been synthesized a versatile novel fluorescent probe 6-Chloro-3-hydroxy-2-(2´-thienyl)-4-oxo-4H-1-benzopyran (6-CHTF) linked via smaller sized five-membered heterocyclic thienyl moiety at 2nd position. The photolysis reaction of both substrate (4.14 × 10-5 M) and dye sensitizers has been performed through a irradiation source, a medium pressure mercury lamp, additionally placing a filter in front of the lamp for selective excitation wavelength in certain solvent such as acetonitrile. An analysis of the absorption and emission spectra of these molecules upon irradiation explains their product formation.........

Keywords: Photorearrangement; Photolysis; Excited-state intramolecular proton transfer; Quantum yield.

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Abstract: Some polymers are studied to know the effect of branching, flexibility and cross – linking on crystallization of polymers. It is found that the chain flexibility of polymers1 and the velocity of crystal nucleation are important factors.

Keywords: Flexibility , crystalline melting point (TM) , degree of linerity , molecular architectutre , velocity of crystal nucleation , vulcanization , cross – linking , crystallization rate.

[1]. D. Kumar;Ph.D. Thesis (1984) , study of crystallization of polymers, study of crystallization of polymers , Patna University, Patna , India.
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Abstract: The chemistry of Schiffs Base containing an active imine linkage has assumed important because of their versatility in the synthesis of many additivesand application of in the metal working fluids. Schiff base of N,N-bis-(p-dimetylaminobenzylidenediaminopropanand its metal complexes have been synthesied. All the prepared compounds were characterized by their spectral(IR, NMR) and screened for their antimicrobial activities. We have been synthesized and applied these compounds as additives in the oil based metal working fluids.In addition to these, in the formulation of cutting fluids were also included contact synthesized N-containing compounds having antifungi, antibacterial and other useful properties.

Keywords: antibacterial, antifungal, Schiff bases, metal complexes.

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Abstract: This study undertaken to assess the physico-chemical and microbial activity of underground water recharged by water harvesting system ofsidhi town and Rampurnaikin town. From the collected samples the color PH, iron, total dissolved solid, salinity, electrical conductivity, acidity, alkalinity, chloride, total hardness, calcium and magnesium hardness and microbial activities were analyzed and studied. The result obtained were compared with the standard value of BIS (Bureau of Indian standards) and accordingly recommendation suggested..

Keywords: Microbial activity, water harvesting drinking water, physic- chemical properties

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Abstract: This research work undertaken for complete chemical studies to make the waste flowersusefull for industrial purpose. During the chemical studies the temple waste flowers were collected and analyzed based on certain characteristics study which includes PH. Conductivity, moisture content,ash content, volatile content, matter soluble in water and in acid, bulk density specific gravity, porosity Methylene blue no, iodine no and surface area SBET, etc. and preparation of activated carbon by pyrolysis process. A part from this the activated carbon were softened and verified by FESEM (field.......

Keywords: Temple waste flowers, activated carbon Pyrolysis , EDS, FESEM and SBET.

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Abstract: This paper presents a review on the application of nanotechnology for enhancing oil recovery in oil and gas industry. Different types of nanoparticles; metallic, metal oxide, inorganic organic and magnetic nanoparticles has been reviewed. Application of nanotechnology in oil and gas industry has been revised in enhanced oil recovery, corrosion and scale inhibition, drilling and hydraulic fracturing fluids, exploration and reservoir characterization, reservoir cementing, production and stimulation. Challenges and current research gaps; cost ineffective route for synthesis and delivery of nanoparticle, mechanism for migration and transport behaviour of nanomaterials through a porous media, determination of size of nanomaterials to secure effective penetration into porous reservoir and agglomeration of nanoparticles in a coarse and harsh conditions of sub-surfaces were also discussed.

Keywords: Nanotechnology, Nanoparticle, Oil and Gas, Enhanced Oil Recovery, Heavy Oil Recovery

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Abstract: 2,3-di(4-nitro phenyl)-6-hydroxy quinoxaline was synthesized by the reaction of 4,4'-dinitro benzil with 3,4-diamino phenol by warming in a water bath for 1h,in the solvent medium of rectified spirit and the product was recrystallized from ethanol.6-(1-hydroxy hexyloxy)-2,3-di(4-nitro phenyl)quinoxaline was synthesized by the reactionof 2,3-di(4-nitro phenyl)-6-hydroxy quinoxaline with 1-choro-6-hydroxy hexane in the presence of potassium hydroxide and potassium iodide in the solvent medium of DMSOat 800c for 18h. The vinyl monomer was synthesized by the treatment of 6-(1-hydroxy hexyloxy)-2,3-di (4-nitro phenyl) quinoxaline with methacryloyl chloride in the solvent medium...........

Keywords: 4,4'-di nitro benzil, 2,3-di(4-nitro phenyl)-6-hydroxyquinoxaline, 6-(1-hydroxy hexyloxy)-2,3-di(4-nitro phenyl)quinoxalinemonomer,co-polymer

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Abstract: Samples of Eremomastax polysperma leaves were obtained from three cultivated gardens of the plant within Akwa Ibom State. During dry and wet seasons of the year. The plant was analyzed for Nutritional and Anti- nutrient potentials of the leaves to establish their variation with season. The result of the analysis revealed a significant level of variable among all the chemicals. For the proximate, Ash, fat, crude protein crude fiber, were higher in the dry season while moisture, carbohydrate and energy were higher in the wet season. The trends of occurrence of the macro mineral were the same but with variations in concentration for both seasons. Trends of occurrence as well as concentration...........

Keywords: seasonal variation, Neutrients, Anti-nutrients, Eremomastax polysperma.

[1]. Abasiekong, B.O., Ukpong, I.J & Abasiekong, R.S (2014). Comparative Evaluation of the Toxicants levels of some edible green vegetable in Ikot Ekpene. Elixir Applied Chemistry, 70 (2014):244140-24141
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Abstract: Zeolite was synthesized from coal fly ash by direct hydrothermal treatment with sodium hydroxide at different concentration ratios at temperature 550 °C and activation time of 4 hrs. Characterization of coal fly ash and synthesized zeolite was done using XRD, SEM and FTIR. It was used as a low cost adsorbent for the removal of Methylene Blue dye from wastewater. Batch studies were carried out to study the effect of pH, adsorbent doses, adsorbate concentration,..........

Keywords: Methylene Blue, zeolite, adsorption, Langmuir, Freundlich isotherm

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