Volume-11 ~ Issue-3 ~ March-2018

Abstract: Chemistry ofProteins which are the most complex substances known to man is one of the great challenges in modern science. In the present work peptides of amino acid were used to study metal-ligand stability constants. Various chelates of metal ions like Al(III), Cr(III), Fe(III), Pt(IV) etc. with various chalcones and amino acids were studied for their stability determination. In the present work complexes of transition metal ions like Cu(II) and Ni(II)with peptide; DL- Alanyl-DL- Alanine were prepared and progress of their formation and metal-ligand stability constants at 0.1M ionic strength were studied potentiometrically. It was found that for Cu(II) the colourlesssolution changed to blue at about pH 5.0 and for Ni(II) at pH 5.25 the colourless solution changed to orange. The stability was studied from Ƞ (ligand number) values and logK values. It is concluded from results that complex of Cu(II) with DL- Alanyl-DL- Alanine is more stable than that for Ni(II).

Keywords: Complex,Peptides, Stability constant, pH etc.

[1]. P.Doty: Scientific American; 173,197 (1957).
[2]. F.J.C.Rossotti and H.Rossotti: Determination of Stability Constants;Mc.Graw Hill Book Co.
[3]. A.E.Martell and M.Calvin: Chemistry of Metal Chelate Compounds; Prentice Hall (1962).
[4]. M.L.Narwade,M.M.Chincholkar and S.W.Sathe; Indian J. Chem. Soc.LXII, 194(1985).
[5]. P.D.Sawwalakhe and M.L.Narwade; Indian J. Chem. Soc., 310 (1993).

Abstract: Chemical speciation study of the interaction of Terephthalic acid dihydrazide with H+, Mn2+ and Co2+ was carried out using a potentiometric method of data acquisition followed by chemometric modeling methods of analysis. The ligand possesses two hydrazide chelating units and is therefore able to form monometallic and bimetallic species in different protonated, unprotonated and deprotonated forms. Several species of the type MmLlHh (m=1or 2, l=1 or 2 and h varies from 4 to -1 depending on m and l) were observed to be present in solution. Concentration distribution diagrams were generated using the HYSS program.

Keywords: Terephthalic acid dihydrazide, ditopic, binuclear, chemical speciation, stability constants.

[1]. Vanden Beuken EK, and Feringa BL.Bimetallic catalysis by late transition metal complexes. Tetrahedron. 1998; 54: 12985-13011.
[2]. Steinhagen H, Helmchen G, Asymmetric two-center catalysis: Learning from Nature. Angew. Chem. Int. Ed. 1996; 35:2339-2342.
[3]. Jonasse HB, Ramanujam VV. Binuclear complexes as catalysts. J. Phys. Chem. 1959; 63 (3):411-415.
[4]. McKenzie CJ, Robson R. High turnover catalysis at bimetallic sites of the hydration of nitriles to carboxamides co-catalyzed by
acid. Chem. Commun. 1988:112-113.
[5]. Shibasaki M, Yamamoto Y. Multimetallic Catalysts in Organic Synthesis. Wiley-VCH: Weinheim, Germany, 2004

Abstract: Capacity building is a diverse term which has different meanings to different people, depending on their targets and future plans to achieve certain objectives. Specifically capacity building encompasses the country's human, scientific, technological, organizational, institutional and resource capacities. The UNDP recognizes that capacity building is a long term continuing process in which all stakeholders (ministries, local authorities, non-governmental organizations "NGOS", water user groups, professional associations, academicians and others) participate. Briefly capacity building is much more than training and it includes the following:

[1]. IISD (2006): Summary of the capacity building workshop on partnerships for improving performance of water utilities in the African Region. Capacity Building Workshop Bulletin, Volume 4.
[2]. Wikipedia (Encyclopedia): Capacity Building (website).
[3]. Website (2007): Capacity building and transboundary cooperation.
[4]. Observations and experience of the author.

Abstract: Concentrations of six heavy metals (Iron (Fe), Lead (Pb), Nickel (Ni), Copper (Cu), Zinc (Zn) and Chromium (Cr)) in the flesh were investigated for two most consumed frozen fish species (Clupeaharengus and Scomberscombrus) in Mubi, metropolis. Samples were collected from Mubi market and taken to the Department of Fisheries and Aquaculture, Adamawa State University, Mubi for analysis.Length and Weight were measured using meter rule and weighing balance respectively.Wet digestion of the samples was doneand the concentrations of metals were evaluated using Atomic Absorption Spectrophotometer (AAS). Results revealed the highest concentrations of 18.152±0.696b, 0.036±0.001a, 0.040±0.003a, 19.590±0.012a, 0.019±0.001b and 0.082±0.018bc for Fe, Pb, Ni, Cu, Zn and Cr respectively in Clupeaharengus. In Scomberscombrus, the highest concentrations for Fe, Pb, Ni, Cu, Zn and Cr were 17.980±o.201a, 0.031±0.035b, 0.041±0.002a, 20.285±0.998, 0.012±0.011a and 0.065±0.001a respectively..........

Keywords: Contamination, Consumption, Bioaccumulation, Bio-magnifications and Danger.

[1] Aksoy, A. (2008). Chicory (CichoriumintybusL.): a possible bio monitor of metal pollution. Pakistan. Journal of Botany, 40(2):791-797.
[2] Alinor, J. and Obiji, I. A. (2010). Assessment of trace metal composition of fish samples from NorrieRiver. Pakistan Journal of Nutrition, Vol. 9(1): 81-85.
[3] Bajc, Z., Gacnik, K.S., Jenci, V. and Doganoc, D.Z. (2005): The pontent of Cu, Zn and Mnin Slovenian freshwater fish. Slov. Vet. Res., 42:15-21.
[4] Battarbee, R., Anderson, N., Appleby, P., Flower, R. J., Fritz, S., Haworth, E., Higgit, S., Jones, V., Kreiser, A., Munro, M. A., Natkanski, J., Oldfield, F., Patrick, S.T., Richardson, N., Rippey, B and Stevenson, A. C. (1988).Lake Acidification in the United Kingdom, ENSIS, London.Pp. 108.
[5] Beetseh, C. I. and Abrahams, J. O. (2013). Dangers of BioaccumulationofHeavy Metals consumed in Sardine and Mackerel (ice fish) Benue State, Nigeria. Journal of Civil and Environmental Research: 3(5): 1-6.