Volume-14 ~ Issue-4 ~ April 2021

Abstract: Background: Fatty acid composition and knowledge of properties such as density and kinematic viscosity are paramount both for optimizing diesel engine operation and for specification of fuel quality. The objective present work is to study the thermophysical and chemical properties of biodiesel as well as blends (B5, B10, B20) of biodiesel with diesel for their transferability as alternative diesel. The Biodiesel has been formulated from the seed oil ceiba pentandra by the transesterification reaction. Materials and Methods: Density of samples was evaluated at pressures up to 40MPa and varying the temperature from 293.15K to 353.15K. Kinematic viscosity of samples was measured at atmospheric pressure in a temperature range from 293.15K to 373.15K and presented in this work. Density values were fitted from the modified Tait-like equation with absolute mean deviations of approximately 0.005%......

Keyword: Ceiba pentandra; biodiesel; bleeds; thermophysical properties and isothermal compressibility.

[1]. Knothe G, Steidley KR. Viscosité cinématique des composants du biodiesel (acide gras esters d'alkyle) et composés apparentés à basse température. Fuel 2007; 86: 2560–7.
[2]. DYC Leung, X.Wu et MKH Leung. Une revue de la production de biodiesel par transestérification catalysée. Énergie appliquée. 2010 ; 87 (4): p. 1083 - 1095.
[3]. hanh LTT, Okitsu K, Boi LV et Maeda Y. Les technologies catalytiques pour la production de carburant biodiesel et l'utilisation du glycérol sont vues. Catalyseurs. Production de carburant biodiesel et l'utilisation du glycérol sont vues. Catalyseurs. 2012; 2 (1): p. 191 - 222.
[4]. Bettahar Z, Cheknane B, Boutemak K. Etude de la transestérification d'un mélange des huiles usagées pour la production du biodiesel. Revue des Energies Renouvelables (2016) ; 19(4) : 603-613.
[5]. Ashraful A M, Masjuki H H, Kalam M A, Fattah I R, Imtenan S, Shahir S A, Mobarak H M. Production and comparison of fuel properties, engine performance, and emission characteristics of biodiesel from various non-edible vegetable oils: A review. Energy Conversion and Management (2014) ; 80 : 202-228.

Abstract:Ten new derivatives of 5-((dimethylcabamoyl)methyl)-2-butyl-N-alkyl / aryl-4-methyl-6- oxopyrimidine-1(6H)-carboxamide (3a-l) have been synthesized, and most of the derivatives were promisingly active towards antibacterial and antifungal strains as compared with Ampicilin and flconazole as positive controls due to the presence of pyrimidine heterocyclic ring system. All the new derivatives were prepared from 2-(2-butyl-1,6-dihydro-4-methyl-6-oxopyrimidin-5-yl)-N,N-dimethylacetamide (1) is reacted with alkyl / arylisocyanate (2a-l) in dichloromethane at room temperature. The structures of newly synthesized derivatives were confirmed by IR, 1H NMR, MS spectral data and elemental analysis.

Keyword: 2-(2-butyl-1,6-dihydro-4-methyl-6-oxopyrimidin-5-yl)-N,N-dimethylacetamide; alkyl / arylisocyanate; 5-((dimethylcabamoyl)methyl)-2-butyl-N-alkyl / aryl-4-methyl-6-oxopyrimidine-1(6H)- carboxamide; antibacterial activity; antifungal activity.

[1]. Adrien A, Advances in Heterocyclic Chemistry, United Kingdom Ed., 32, Academic Press, London, 1982, 30.
[2]. Patel, R.; Desai, K.; Chikhalia, K. J. Ind. Chem. Soc. 80, 138(2003).
[3]. Desai, K.; Patel, R.; Chikhalia, K. J. Ind. Chem. 45 (B), 773(2006).
[4]. Amr, A.E., Nermien, M.S., Abdulla, M.M. (2007) Monatsh. Chem. 138, 699.
[5]. Fujiwara, N., Nakajima, T., Ueda, Y., Fujita, H., Kawakami, H. (2008) Bioorg. Med. Chem. 16, 9804

Abstract: The methods which applied in this study to estimate the chemical composition, especially XRF – and IR , showed that: The samples under studied (Sediments and Rocks ) contain high levels of calcium and the IR spectra shows presence one major peak which gave indicate that the main composition is CaCO3 mixed with small amounts of CaO. Also, the X –Ray analysis recorded Al and Si metals in most samples, this is mainly attributed to presence other ores as feldspar or silica, the presence of magnesium in the most is concern to magnesium – calcite carbonate (Dolomite). Generally, this study concluded that the sediment and rocks of Al –Gabal Al –Akhder (Libya) coast mainly composed by calcite with minor contents with other oxides.

Keyword: Sediments and Rocks, XRF, IR, Ras AL-hilal, Susah, Easterner coast, Libya

[1]. Ravisankar R. (2009) Application of Spectroscopic techniques for the identification of minerals from beach rocks of Tamilnadu. EARFAM. 19:272.
[2]. Farmer VC. (1974 )The IR Spectra of Minerals. Mineralogical Society. London. 1974;182.
[3]. Pichard C, Frohlich F. (1986) Quantitative IR analysis of sediments, Example of Quartz and Calcite determination. Revue de I InstitutFrancais du Petrol.;41:6.
[4]. Mattesson, A. and Herron, M. M. (1993) .Studied the Geochemical Assessment of sediment in Cape Town Harbour, South Africa 9308 presented at the Society of Core Analysis Annual Meeting, August 9-11.
[5]. Wang, Z.; Chen, Z.; Tao, J. J. Coastal Res. 2006,studied geochemical Assessment of sediment in cape town harbour, south Africa

Abstract: This research was carried out to studied the electrochemical behavior of metals Cu(II) with Lysine (Lys) by Cyclic voltammetry (CV), Chronamperometry (CA), UV-Vis and FTIR spectroscopic techniques. Electrochemical and spectroscopic techniques reveal the interaction of Cu(II), with the ligands (Lys) that may be formed of metal-ligand complexes. Electrochemical studies have been carried out in variation of metal ion concentration, ligand concentration, buffer solution of different pH and different scan rate. In this study all the experiment is carried out only in aqueous buffer solution; KCl or other conventional supporting electrolytes are not used in the solution. The effect of pH of Cu(II)-Lys was studied by varying pH from 3.0 to 9.0. The maximum peak current was obtained at pH 4.........

Keyword: Cyclic voltammetry, pH effect, Cu(II)-Lysine complex, Chronamperometry (CA), UV-Vis and FTIR

[1]. M.B. Robin, P. Day., H. Emeleus and A. Sharpe, 1968, "Advances in Inorganic Chemistry and Radiochemistry", Vol. 10, pp. 247 – 422.
[2]. P. Zanello, 2003, "Inorganic Electrochemistry: Theory, Practice, and Application", Royal Society of Chemistry, 1st Ed.
[3]. Zanello, P., Opromolla, G., Herberhold, M. and Brendel, H.D., 1994, Journal of Organometallic Chemistry, Vol. 484, pp. 67–70.
[4]. D.H. Brown and W.E. Smith, 1990, "Enzyme Chemistry-impact and Applications", Chapmann and Hall, London.
[5]. Vermeulen, N. P., Bessems, J. G. and Van de Straat, R., 1992, "Drug Metab. Rev", Vol. 24, p. 367.
[6]. Prescott, L. F., 1996, "Paracetamol (Acetaminophen) a Critical Bibliographic Review", Taylor & Francis Ltd., London, pp. 285–351

Abstract: The corrosion inhibitive behaviour of Datura metel seed extract on mild steel in acidic environment was investigated using gravimetric, electrochemical and spectroscopic methods. The results suggest that Datura metel seed extract acts as an efficient eco-friendly corrosion inhibitor for mild steel in 1 M HCl solution. The inhibition efficiency increased with an increase in inhibitor concentration and temperature, respectively. Maximum corrosion inhibition efficiency was found to be 95% at 0.5 g/mL and 333 K. Thermodynamic parameters such as a, ΔH⁰, ΔS⁰ and
were also evaluated. The results revealed that corrosion inhibition may be due to the spontaneous chemical adsorption of the plant constituents on the surface of mild steel. The adsorption of the extract on the mild steel surface was found to obey Langmuir's adsorption isotherm. Atomic Absorption Spectroscopy (AAS) analysis confirmed......

Keywords: Mild steel, Datura metel seed, Inhibition, Adsorption, Electrochemical method

[1]. El-Haddad, M.A.M., Bahgat Radwan, A., Sliem, M.H., Hassan, W.M.I & Abdullah A.M (2019). Highly efficient eco-friendly corrosion inhibitor for mild steel in 5 M HCL at elevated temperatures: experimental &molecular dynamics study. Scientific Reports, 9: 3695. https://doi.org/10.1038/s41598-019-40149-w
[2]. Bodude, M. A. & Sanni, O. S. (2014): Evaluation of Inhibitive Performance of some Plants extracts on Low Carbon Steel Corrosion. Studies in Engineering and Technology. 1 (2):21-28.
[3]. Edoziuno F.O., Adediran A.A, Odoni B.U., Akinwekomi A.D., Adesina O.S. & Oki M. (2020). Optimization and development of predictive models for the corrosion inhibition of mild steel in sulphuric acid by methyl-5-benzoly-2-benzimidazole carbamate (mebendazole). Cogent Engineering, 7:1, https://doi.org/ 10.1080/23311916.2020.1714100.
[4]. Buchweishaija, J. (2009). Phytochemicals as green corrosion inhibitors in various corrosive media: A review. Tanzania Journal of Science, 35:77-92
[5]. Phadke, S, N., Kedila R., Seranthimata S., & Vijaya Alva, D. P. (2017). Fatty Acids and its Derivatives as Corrosion Inhibitors for Mild Steel – An Overview. Journal of Asian Scientific Research, 7 (8):301-308

Abstract: methoxybenzylideneamino)phenylimino)methyl)–6–methoxyphenol (H2L) gives the metalloligand [Cu(L)].(H2O) (1). Reaction of metalloligand (1) with three fold of sodium dicyanamide Na[N(CN)2] gives the new tetranuclear compound [{Cu(μ–L)Na(EtOH)}(μ-1,5–N(CN)2){Cu(μ–L)Na (N(CN)2)]}] (2). Suitable crystals of (2) were grown by slow evaporation of ethanol solution for one week. The metalloligand (1) and the tetranuclear (2) complexes are characterized by IR and physical measurement. The Schiff base H2L behave an N2O2O'2 coordination hexadentate ligand which can encapsulate two metal ions. The structure of (2) was elucidated by X–ray diffraction analysis. The asymmetric unit of the compound contains two dideprotonated ligand molecules, two tetracoordinated copper ions, two hexacoordinated sodium ions, one monodentate dicyanamide unit, one coordinated ethanol molecule and.....

Keywords: Iron, Metalloligand, o–Vanillin, Sodium Dicyanamide

[1]. M. Lashanizadegan, Z. Gorgannejad, M. Sarkheil, Cu(II) Schiff base complex on magnetic support: An efficient nano-catalyst for oxidation of olefins using H2O2 as an eco-friendly oxidant, Inorg. Chem. Commun., 2021, 125, 108373.
[2]. M. Premkumar, P. Vijayan, G. Venkatachalam, Half-sandwich Ruthenium(II) Schiff base complexes: Synthesis, characterization and effective catalysts for one-pot conversion of aldehydes to amides, J. Organomet. Chem., 2019, 902, 120964.
[3]. P. Ghorai, P. Brandão, S. Benmansour, C.J.G. García, A. Saha, Azido and thiocyanato bridged dinuclear Ni(II) complexes involving 8-aminoquinoline based Schiff base as blocking ligands: Crystal structures, ferromagnetic properties and magneto-structural correlations, Polyhedron, 2020, 188, 114708.
[4]. S. Saha, S. Pal, C.J. Gómez-García, J.M. Clemente-Juan, K. Harms, H.P. Nayek, A ferromagnetic tetranuclear nickel(II) Schiff-base complex with an asymmetric Ni4O4 cubane core, Polyhedron, 2014, 74, 1–5.
[5]. B. Shaabani, A.A. Khandar, S.S. Kazemi, Z. Shaghaghi, A.K. Boudalis, V. Psycharis, A. Raptopoulou, Crystal structure and topological ferrimagnetic behavior of a new 2D metal–organic hybrid manganese complex [Mn3(N3)4(L)2(H2O)2]n·0.6(C2H5OH)·1.4(H2O) with the AF/AF/F alternating sequence (HL=N′-((pyridine-2-yl)methylene)isonicotinohydrazide), Polyhedron, 2013, 49, 61–66