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Sylwia Pasieczna-Patkowska and Tomasz Olejnik

Abstract

This article describes the application of IR spectroscopic methods in the study of the composition of finished cosmetic products. Four spectroscopic techniques: TS (transmission spectroscopy), PAS (photoacoustic spectroscopy), ATR (attenuated total reflectance) and DRS (diffuse reflectance spectroscopy) were used for this purpose. Tested cosmetic products were of different consistency and application. The choice of spectroscopic techniques was dictated by the physical state and consistency of the sample.

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Ancaelena-Eliza Sterpu, Anca Iuliana Dumitru and Mihai-Florinel Popa

Abstract

This study aims to characterize the corrosion behavior of steel by static immersion tests in biodiesel obtained from three different types of vegetable oils (sunflower oil, rapeseed oil and corn oil) at room temperature for 49 days. At the end of the test, corrosion behavior was investigated by weight loss measurements and changes in physical and chemical properties of biodiesel. Biodiesel samples were analyzed to investigate density, dynamic viscosity, acidity index, refractive index and saponification index. Results showed that under the experimental conditions, steel was more susceptible to corrosion in biodiesel from corn oil as compared to biodiesel from sunflower oil and rapeseed oil.

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Daniela Pereira, Paula M. R. Correia and Raquel P. F. Guiné

Percepcion, Editorial ACRIBIA, S.A., Zaragoza - Espana. Saltin S, Sumnu SG (2006) Physical Properties of Foods, Ankara, Turkey. Seyhun N, Sumnu G, Sahin S (2003) Nahrung 47: 248-251. Shibukawa S, Sugiyama K, Yano T (1989) Journal of Food Science 54: 621-624. Szczesniak AS, Loew BJ, Skinner EZ (1975) Journal of Food Science 40: 1253-1256. Vulicevic I, Abdel-Aal E-S, Mittal G, Lu X (2004) LWT - Food Science and Technology 37: 205-213. Zoulias EI, Oreopoulou, V, Tzia C (2002

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W. Rudziński and W. Płaziński

Kinetics of multi-site-occupancy adsorption at the solid/solution interfaces. The absolute rate theory approach

The kinetic approach based on the absolute rate theory and the model of a two-site-occupancy adsorption has been proposed to describe the kinetics of sorption of solute at the solid/solution interfaces. The obtained general kinetic equation reduces to the popular empirical formulas (i.e. the Lagergren equation and the pseudo-second order equation) depending on the values of physical and technical parameters which characterize the adsorption system. here, for the case when the adsorption kinetics is governed by the rate of surface reactions. The features of this general equation are shown by presenting some simple model investigations, and its applicability is tested by presenting the analysis of some experimental data reported in literature.

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Ján Kruželák, Andrea Kvasničáková, Rastislav Dosoudil and Ivan Hudec

V, Lasheras A, Lanceros-Mendez S, Barandiarán JM (2015) Synthesis, physical and magnetic properties of BaFe 12 O 19 /P(VDF-TrFE) multifunctional composites. European Polymer Journal. 69: 224—231. Hamed GR, editor (1992) Materials and Compounds: Engineering with Rubber. New York: Oxford University Press. Jung HS, Kwon SH, Choi HJ, Jung JH, Kim YG (2016) Magnetic carbonyl iron/natural rubber composite elastomer and its magnetorheology. Composite Structures. 136: 106—112. Kraus G (1963) Swelling of filler-reinforced vulcanizates. Journal of Applied

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Lorentz Jäntschi and Sorana D. Bolboacă

.A. Darling, A Test of Goodness-of-Fit, Journal of the American Statistical Association 49 (1954) 765-769. [5]. K. Pearson, Contribution to the mathematical theory of evolution, II. Skew variation in homogenous material, Philosophical Transactions of the Royal Society of London 91 (1895) 343-414. DOI: 10.1098/rsta.1895.0010 [6]. K. Pearson, On the criterion that a given system of deviations from the probable in the case of a correlated system of variables is such that it can be reasonably supposed to have arisen from random sampling

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Zbigniew Suchorab, Marcin K. Widomski, Grzegorz Łagód, Danuta Barnat-Hunek and Piotr Smarzewski

:156-165. [16] Lee J, Horton R, Noborio K, Jaynes DB. Characterization of preferential flow in undisturbed, structured soil columns using a vertical TDR probe. J Contamin Hydrol. 2001;51(3-4):131-144. DOI: 10.1016/S0169-7722(01)00131-0. [17] Lins Y, Schanz T, Fredlund DG. Modified pressure plate apparatus and column testing device for measuring SWCC of sand. Geotechl Test J. 2009;32(5):450-464. DOI: 10.1520/GTJ101318. [18] Skierucha W, Wilczek A, Szypłowska A, Sławiński C, Lamorski K. A TDR-based soil moisture monitoring system with

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Habibat F. Chahul, David T. Orhemba and Taiwo A. Gbadamosi

]. N.O. Eddy, Inhibitive and adsorption properties of ethanol extract of Colocasia esculenta leaves for the corrosion of mild steel in H 2 SO 4 , International Journal of Physical Sciences 4 (2009) 165 - 171. [7]. A.O. James, O. Akaranta, The inhibition of corrosion of zinc in 2.0 M hydrochloric acid solution with acetone extract of red onion skin, African Journal of Pure and Applied Chemistry 3 (2009) 212 - 217. [8]. E.E. Oguzie, I.M. Mejeha, M.C. Nwandu, K.B. Okeoma, L.A. Nnanna, M.A. Chidiebere, F.C. Eze, Experimental and theoretical assessment of

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M. Michel, M. Sprynskyy and B. Buszewski

, Chromatographia , 53, 204 (2001). S. Kowalska, K. Krupczynska, B. Buszewski, Biomed. Chromatogr. , 20, 4 (2006). D. Avnir, The Fractal Approach to Heterogeneous Chemistry , Wiley, Chichester, 1989. M. Jaroniec and R. Madey, Physical Adsorption on Hetrogeneous Solids , Elsevier, Amsterdam, 1988. K. S. W. Sing, Pure Appl. Chem. , 57, 603 (1985). D. B. Zdravkov, J. J. Cermak, M. Sefara, J. Janku, Central Eur. J. Chem. , 5, 385 (2007

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Monika Kosowska-Golachowska, Władysław Gajewski and Tomasz Musiał

- ation of the thermal conductivity and thermal diffusivity of coal. Fuel 43(1964), 267-280. [8] Dindi H., Bai X., Krantz W.B.: Thermal and electrical property measurements for coal. Fuel 68(1989), 185-192. [9] Singer J.M., Tye, R.P.: Thermal, mechanical and physical properties of selected bituminous coal and cokes. Bureau of Mines Report of Investigations 8364 (1979). [10] Herrin J.M., Deming D.: Thermal conductivity of U.S. coals. J. Geophys. Res. 101(1996), 25, 381-386. [11] Suleiman B.M., Larfeldt J