Volume-2 ~ Issue-4

Abstract: Kinetics and thermodynamic studies of chlorination of N-(p-substituted phenyl) -3,5- dimethyl -1, 1- dioxo-1,2-thiazine (C4H2(CH3)2SO2 N C6H4-X); {X = H, p-Cl, and p-OCH3} by using sulfuryl chloride (SO2Cl2) in chloroform medium have been investigated by Isolation method the observed rate of chlorination pseudo first order for 1,2-thiazine and SO2Cl2 and second order in overall reaction and using conductivity method. The reaction rate constant increases with increasing temperature from 273K to 318K. The kinetic and thermodynamic parameters k, Ea, ΔH# and ΔS# have been calculated. The corresponding halogenated 1,2- thiazine has been identified as a product of halogenation. A suitable reaction scheme is proposed and an appropriate rate law is deduced to account for the observed kinetic and thermodynamic data.
Keywords :Sultam, Chlorination (SO2Cl2), Kinetic, thermodynamic, conductivity.

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Abstract:study was carried out to determine the physicochemical and functional properties of bambara groundnut (Vigna subterranean L) seed using standard methods of analyses. The proximate compositions (%) were as follow; moisture (9.82±0.02), ash (3.10±0.10), crude protein (22.46±0.02), crude fat (5.80±0.02), crude fibre (4.50±0.01), carbohydrate (55.00±0.50) and energy content (362.04Kcal/100g). The mineral composition (mg/100g) of bambara groundnut showed potassium with 1702.10±0.50 to be the highest followed by phosphorus (738.04±0.15), magnesium (347.15±0.01), calcium (256.56±0.05), sodium (135.30±0.05), iron (18.51±0.10) and manganese (10.46±0.05). The antinutrient composition in mg/100g revealed tannin to be (7.15±0.50), phytic acid (6.94±0.02) and trypsin inhibitor (1.56±0.10). The functional properties of the seed also showed foam capacity to be 28.62±0.02%, foam stability at 30 and 60 min to be 21.00±0.02 and 13.00±0.10% respectively while foaming height was 40.32±0.01cm3. The carbohydrate fractions of the seed (g/mg) showed the following pattern: reducing sugar 3.61±0.05, raffinose 0.35±0.01, stachyose 1.57±0.10 and starch 48.12±0.20. The results of this research work revealed that the seed has a potential for dietary improvement as functional agent in food industry.
Keywords -Bambara groundnut, proximate, mineral, antinutrient, functional, carbohydrate.

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Abstract:Ascorbic acid (Laboratory grade), grape juice and vitamin C tablet (a pharmaceutical product) were either packaged in different materials or exposed to air or stored at different temperature were used to study stability of ascorbic acid using titrimetric analytical method with 2,6-dichlorophenolindophenol. Results of analysis showed that packaging materials, exposure to air and storage temperature condition significantly affected the stability of the vitamin. A significant negative correlation exists between ascorbic acid decline and time of storage and of exposure to air. Ascorbic acid content was more stable in the three sources when stored under refrigeration condition (4-50C) as obtained in the investigation.
Keywords -Stability, ascorbic acid, packaging materials, refrigeration condition, exposure, sun.

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Abstract:Mixed ligand Co(II), Ni(II) and Cu(II) complexes Co(EINA)2(PPD), Ni(EINA)2(PPD) and Cu(EINA)2(PPD), formed with ethyl-α-isonitrosoacetoacetate and dienes have been synthesized and characterized by their elemental analysis, infra red spectra and magnetic measurements. Ethyl-α-isonitrosoacetoacetate shows a tridentate behavior with coordination occurring through two oximino nitrogen atoms and further two coordination sides of metal ion are satisfied by oxygen atom. Diene acts as a bidentate ligand coordinating through the two nitrogen of the amino group.
Keywords -characterization, Dienes Co (II), Cu (II) and Ni (II), Ethyl-α-isonitrosoacetoacetate. Synthesis

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