Open Access Short communication

Experimental Study of New Collagen-containing Preparations

Olga Andreyeva, Lesia Maistrenko

Chemical Science International Journal, Page 1-6
DOI: 10.9734/ACSJ/2016/20468

Leather industry is one of the main sources of collagen-containing raw materials. Therefore, effective recycling of these raw materials into marketable products is a pressing problem not only for leather industry but also for other branches of national economy. In the present work, we have studied into new collagen-containing preparations, derived from untanned by-products of leather industry. The size of particles in collagen preparations was assessed using microscopy. Chemical analysis was carried out under chemical research technique. IR spectroscopy has revealed the presence of various functional groups in the structure of developed preparations. Based on the results of experimental data, we concluded that new collagen-containing preparations can be used in many sectors of national economy.

Open Access Original Research Article

Adsorption and Thermodynamics Behaviors of Ferroin [tris(1,10-phenanthroline Iron(II) Sulphate Complex] as Corrosion Inhibitor for Mild Steel in Acidic Medium

Shefali Dahiya, Suman Lata

Chemical Science International Journal, Page 1-11
DOI: 10.9734/ACSJ/2016/21414

The inhibition effect of Ferroin solution [tris(1,10-phenanthroline iron(II) sulphate complex] as a corrosion inhibitor was analysed against corrosion of mild steel (MS) in 0.5 M HCl solution, by using weight loss method, linear polarization, electrochemical impedance spectroscopy and scanning electron microscopic. The weight loss study of MS samples has proved that the reagent used was an efficient corrosion inhibitor with inhibition efficiency of >90%. The mixed mode of inhibition was confirmed by electrochemical polarizations. The results of electrochemical impedance spectroscopy have shown the changes in the impedance parameters, like Rct and Cdl, which confirmed the adsorption phenomenon taking place on the MS surface. The inhibition action of the compound was assumed to occur through adsorption on the steel surface at the active centers present in the inhibitor.

Open Access Original Research Article

Thermodynamic Calculation and 3D Modeling of the Liquidus and Immiscibility Surfaces of the Ge–Cu–Tl System

A. N. Mamedov, Z. E. Salimov, L. F. Mashadiyeva, M. B. Babanly

Chemical Science International Journal, Page 1-5
DOI: 10.9734/ACSJ/2016/21808

This work devoted to the calculation and 3D visualization of the crystallization surface of Ge and immiscibility surface of alloys based on thallium and copper in the Cu-Tl-Ge system. For determining and modeling these properties were used thermodynamic equations which are solved based on thermodynamic information obtained from the phase diagram of the binary boundary systems by using a limited number of experimental data for the ternary system. The calculation and visualization of immiscibility in the concentration range xGe=0÷0.55 and crystallization surfaces of Ge in the concentration range xGe=0.55÷1.0 mole fraction for section yPb=xPb/(xPbTl)=0÷1 were performed by the program OriginLab2015 and grafikus.ru/plot3d.

Open Access Original Research Article

Partitioning of Some Heavy Metals in the Soil along the Effluent Channels of JEZCO Plastic Industry Ekwulobia, Anambra State, Nigeria

A. G. Ezeaguba, P. A. C. Okoye, U. C. Umeobika, H. O. Abugu

Chemical Science International Journal, Page 1-15
DOI: 10.9734/ACSJ/2016/21491

The partitioning of some selected heavy metals in soil samples along the effluent channels of JEZCO Plastics industry Ekwulobia was investigated. The pH of the soils had average value of 8.07 and moisture content of 5.22%. The results revealed total metal concentration range of 0.13 mg/kg to 16.49 mg/kg among the metals –Cd, Cr, Pb, Ni, Cu, Co, Zn,Mn, Fe and Ca. Cadmium (Cd) had the lowest metal concentration with a value of 0.15 mg/kg and iron (Fe) had the highest metal concentration with a value of 14.62 mg/kg. The observed trend for total metal concentration was Fe > Mn > Ca > Pb > Cu > Ni > Co > Zn > Cr > Cd. The computed bioavailability of the metals followed the trend: Ca > Mn > Cu > Pb > Ni > Co > Cr > Zn > Cd > Fe. The heavy metal partitioning showed that the highest and lowest concentration of the metals Fe, Mn, Pb, Cr, Cu, Ni, Co and Zn, were found in the residual and water soluble forms respectively, except for Ca which had its highest concentration in the carbonate bound form, and the lowest concentration in the water soluble fraction. The highest concentration of Cd was found in the residual fraction and lowest was found in the water soluble fraction. Comparison with NESREA standard also revealed low contamination level of the metals, and there was no mean significant difference to conclude there was heavy metal pollution of the environment.

Open Access Original Research Article

Ameliorative Effect of Hydromethanolic Fraction of Citrullus lanatus Seeds on Biochemical and Histology Parameters of Female Wistar Rats Administered with Caffeine

G. I. Onyeso, K. W. Nkpaa, P. C. Osaretin, E. Ugochukwu

Chemical Science International Journal, Page 1-10
DOI: 10.9734/ACSJ/2016/21833

This study aimed at evaluating the ameliorative effect of hydromethanolic fraction of C. lanatus seeds on biochemical and histology parameters of female Wistar rats administered with caffeine. Oral administration of hydromethanolic fraction of C. lanatus seeds on experimental rats caused a significant reduction in serum aspartate, alanine and alkaline transaminases. The extract caused an increase dopamine and prolactin levels. The extract of C. lanatus at 200 mg kg-1 not only reversed the histopathological effects of caffeine but also counteracted the deleterious effects of caffeine - induced pituitary gland and hepatocyte injury by protecting pituitary gland tissues and hepatocyte cells. Thus hydromethanolic fractions of C. lanatus seeds have ameliorative effect.

Open Access Review Article

Effect of Infra-red Drying on the Stability of Physicochemical Properties, Phenolics, Flavonoids and on Antioxidant Activity of Allium sativum

Litaiem Jihène, Touil Amira, Zagrouba Fethi

Chemical Science International Journal, Page 1-12
DOI: 10.9734/ACSJ/2016/19342

In this work, the effect of infrared drying temperatures on the physicochemical properties and antioxidant capacity of Allium sativum was investigated. The following parameters were analyzed: proximal composition, mineral content, total phenolics content, and total flavonoids content. The antioxidant activity was evaluated by means of DPPH, ABTS and and β-carotene assays. Results have shown that a significant alteration in the physicochemical properties was produced at high drying temperatures. However, both total phenolic content and flavonoid content decreased as drying temperature decrease. Thermal processing seems to preserve antioxidant activity at higher temperature.