Volume-13 ~ Issue-6 ~ June 2020

Abstract: The article is devoted to the research of binary water systems with the purpose of their further use as a coolant and heat storage material (HSM) in capacitive type heat accumulators. A method is presented for engineering calculation, which allows to determine the volume and functional feasibility of the battery, the maximum amount of stored heat, as well as to conduct a comparative analysis of different combinations of HSM. The results of researches of receiving useful heat in time, and depending on temperature, and also energy efficiency are resulted. Background: The search is a relevant area of research for new and the research of already known HSM in the field of energy and heat supply. It is known that HSMs differ in application temperature, physical condition, origin, field of application, economic feasibility, and so on. One of the promising areas is the use of binary water systems as low-temperature HSM in heat accumulators. Materials and Methods: Based on the analysis.....

Key Word: binary water systems, heat accumulating substances, water-soluble polymers, heat accumulator, efficiency.

[1]. Lund, H., Werner, S., Wiltshire, R., Svendsen, S., Thorsen, J. E., Hvelplund, F., et al. (2014). 4th Generation District Heating (4GDH): integrating smart thermal grids into future sustainable energy systems. Energy 68, 1–11. doi: 10.1016/j.energy.2014.02.089
[2]. Process Intensification Principles Applied to Thermal Energy Storage Systems—A Brief Review, Xiaofeng Guo and imageAlain Pascal Goumba, review article, Front. Energy Res., 20 March 2018, | https://doi.org/10.3389/fenrg.2018.00017
[3]. https://www.energy.gov/energy-storage-grand-challenge/energy-storage-grand-challenge
[4]. Паспорт «Експериментальний стенд №5 для дослідження теплофізичних властивостей акумулюючих речовин та ефектів високотемпературної сорбції/десорбції», - НАНУ ІТТФ. - 2019р. – 28с.
[5]. VG Demchenko, VY Falco, Experimental research of thermal stability of substances for thermal energy storage Thermophysics and Thermal Power Engineering, 2019, 41 (2), р. 64-71.

Abstract: Polynuclear mixed oxidation CoIII—CoII—CoIII complex formulated as{[(HL)(SCN)Co](m-L)[Co(SCN)4](m-L)[Co(SCN)(HL)]}2.2(C2H5OH).2(H2O) (1) has been prepared from a Schiff base (HL = N, N-dimethyl-N'- ((5-methyl-1H-imidazol-4-yl)methylene)ethane-1,2-diamine) containing imidazole ring. The complex (1) is characterized by elemental analysis, UV–Vis and IR spectroscopic studies. The complex (1) crystallizes in the triclinic space group P-1 with unit cell dimensions a = 11.3017 (7) Å, b = 15.1468 (11) Å, c = 18.9796 (18) Å, = 71.849 (7)°,  = 82.048 (7)°,  = 86.477 (6)°, V = 3057.1 (4) Å3, Z = 1, R1 = 0.092 and wR2 = 0.308. Both CoIIandCoIIIcationsare in a N6 inner and are situated in a distorted octahedral environment. The CoII cation is linked by two imidazole nitrogen atoms and fournitrogenatoms from thiocyanate anions. The CoIII cation is octacoordinated is linked by two imidazole nitrogen.......

Keywords: Schiff base, crystal, complex; cobalt, octahedral, magnetism.

[1]. V.G. Vlasenko, A.S. Burlov, Y.V. Koshchienko, A.A. Kolodina, Y.V. Zubavichus, V.A. Lazarenko, V.N. Khrustalev, Synthesis, crystal structure and magnetic properties of copper(II) complexes with 4-methyl-N-[2-[(E)-2-pyridyl[alkyl]iminomethyl]phenyl]benzenesulfamide ligands, J. Mol. Struct., 2020, 1203, 127450.
[2]. E.P. Ivakhnenko, P.A. Knyazev, K.A. Lyssenko, A.G. Starikov, V.I. Minkin, Synthesis and redox activity of the ruthenium complexes based on 9-hydroxy-2,4,6,8-tetra-(tert.-butyl)phenoxazin-1-one ligands, Inorg. Chim. Acta, 2019, 484, 430–436.
[3]. C. Liu, X. Zhu, P. Zhang, H. Yang, C. Zhu, H. Fu, Axially Chiral Cyclic Diphosphine Ligand-Enabled Palladium-Catalyzed Intramolecular Asymmetric Hydroarylation, iScience, 2018, 10, 11–22.
[4]. D.A. Shultz, Valence Tautomerism in Dioxolene Complexes of Cobalt, , In, Magnetism: Molecules to Materials II, , John Wiley & Sons, Ltd, 2003, pp, 281–306.
[5]. A.G. Starikov, A.A. Starikova, R.M. Minyaev, V.I. Minkin, A.I. Boldyrev, o-Quinone phenalenyl derivatives as expedient ligands for the design of magnetically active metal complexes: A computational study, Chem. Phys. Lett., 2020, 740, 137073..

Abstract: 1,2-Disubstituted benzimidazole moiety showed promising application in biological and clinical studies. Attention has been focused toward the synthesis of the 1,2-disubstituted benzimidazoles dueto their special biological properties. Herein several methods to selective synthesis of 1,2-disubstituted benzimidazoles from the condensation of o-phenylenediamines with aldehydes are reviewed

Keywords: Chemoselective; 1,2-Dibenzimidazoles; o-Phenylenediamine;Selective synthesis.

[1]. P. Naik, P. Murumkar, R. Giridhar, M. Yadav.Angiotensin II receptor type 1 (AT1) selective nonpeptidic antagonists—A
perspective. Bioorg. Med. Chem. 2010; 18 (24): 8418-8456.
[2]. V. K. Vyas, M. Ghate.Substituted benzimidazole derivatives as angiotensin II -AT1 receptor antagonist: A Review Mini-Rev. Med.
Chem. 2010; 10 (14): 1366 -1384.
[3]. T. Ishida, T. Suzuki, S. Hirashima, K. Mizutani, A. Yoshida, I. Ando, S. Ikeda, T. Adachi, H. Hashimoto.Benzimidazole inhibitors
of hepatitis C virus NS5B polymerase: Identification of 2-[(4-diarylmethoxy)phenyl]-benzimidazole.Bioorg. Med. Chem. Lett.
2006; 16 (7):1859-1863.
[4]. Q. Dang, S. Kasibhatla, W. Xiao, Y. Liu, J. Dare, F. Taplin, K. Reddy, G. Scarlato, T. Gibson, P. van Poelje, S. Potter, M.
Erion.Fructose-1,6-bisphosphatase Inhibitors. 2. Design, synthesis, and structure−activity relationship of a series of phosphonicacid
containing benzimidazoles that function as 5′-adenosinemonophosphate (AMP) mimics.J. Med. Chem. 2010; 53 (1):441-451.
[5]. L. Bielory, K. Lien, S. Bigelsen.Efficacy and tolerability of newer antihistamines in the treatment of allergic conjunctivitis drugs.
2005; 65 (2): 215-228..

Abstract: The origin of the spectrochemical series and the different dependence of crystal-field splitting (10Dq) and Racah parameters on the metal-ligand distanceis explored through rigorous calculations on Manganese Complexes.For this purpose, both periodic and cluster calculations have been performed. Background: The importance of the transition metal complexes formed has significance in all areas of science due to its particular properties. The transition metal complexes are widely involved in active centers of proteins, catalysts, molecular electronics, electroluminescent devices, solid-state lasers, gemstones, high-pressure manometers.The spectrochemical series discuss many parameters very clearly. Such as it shows that monoatomic ionic ligands usually....

Key Word: Racah Parameter; Manganese Ions; Co-ordination Compounds

[1]. W. J. Geary, Coord. Chem. Rev., 31, 19, (1964).
[2]. A. Joseph, B. Joseph and B. Narayana, J. Indian Chem. Soc., 85, 479, (2008).
[3]. K. Siddappa, P. C. Reddy, M. Kotta, T. Reddy,
[4]. M. Tambe and M. Mitra, Asian J. Chem., 23, 4511, (2011).
[5]. P. Kumari, S. Prakash and D. Prakash, J. Indian Chem. Soc., 89, 19, (2012)..

Abstract: This study investigates the sugar and heavy metal content of some commonly consumed bottled alcoholic and non- alcoholic beverages in Ozoro town. Ten brands of beverages which comprised of five (5) alcoholic and five (5) non-alcoholic beverages were purchased from retail outlets and analysed for their sugar and heavy metal concentration using UV-spectrophotometer. The samples were labeled as: A1, A2, A3, A4 & A5 (alcoholic) and B1, B2, B3, B4 & B5 (non_alcoholic) beverages respectively. In this study, the result showed that the sugar content in percentage of the beverages analysed are in the ascending order of magnitude: A4 < A3 < B1 < A1 < A5 < B2 < A2 < B3 < B4 < B5. It was highest (0.056%) in B5 among the non-alcoholic and lowest (0.003%) in A4 among the alcoholic beverages. The concentration of heavy metals in mg/l of the analysed beverages are in the order of magnitude: Pb >........

Keywords: alcohols, beverages, contamination, heavy metals, investigation

[1]. Abdulrahman,,F.I., Akan, J.C., Chellube, Z.M. and Waziri, M. (2012). Level of Heavy Metals in Human Hair and Nail Samples from Maiduguri Metropolis, Borno State, Nigeria. World Environment. 2(4):81-89. DOI:10.5923/;.env.2012024.05.
[2]. Adepoju-Bello, A.A., Oguntibeju, O.O., Onuegbu, M.T., Ayoola, G.A.A. and Coker, H.A.B. (2012). Analysis of selected metallic impurities in soft drinks marketed in Lagos,
[3]. Nigeria. African Journal of Biotechnology. Vol. 11(20), pp. 4676-4680. Available online at http://www.academicjournals.org/AJB. DOI: 10.5897/AJB11.3851.
[4]. Al-Mayaly, I.K.A. (2013). Determination of some Heavy Metals in some Artificial Fruit Juices in Iraqi Local Markets. Int. J. Research and Development in Pharmacy and Life Sciences. Available online at http//www.ijrdpl.com. Vol.2, No.4, pp. 507-510.
[5]. Ambler, T. and Styles, C.(1997). Brand development versus new product development: toward a process model of extension decisions. J. Prod. Brand Manage., 6(4). Pp222-234..