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STUDY REGARDING THE OPTIMIZATION OF WOOL DYING WITH NATURAL DYES EXTRACTED FROM GREEN WALNUTS PART 2: MATHEMATICAL MODEL

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Author(s): M. Pustianu | M. Chindriş | A. Popa | E. Airinei | A. Bucevschi | C. Sîrghie | M. Dochia

Journal: Annals of the University of Oradea. Fascicle of Textiles, Leatherwork
ISSN 1843-813X

Volume: XIV;
Issue: 2;
Start page: 143;
Date: 2013;
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Keywords: program of the order II central composed rotabil | naphtocquinone | regression equation | experimental matrix

ABSTRACT
To establish optimal conditions for dying with dye extracted from green walnuts husks was chosen for testing a central compose rotable second order program with two independent variables: concentration of dye and dying temperature. Using the values obtained for dye concentration absorbed in fibre were established the optimum working parameters for dying process with dye extracted from green walnuts husks.In this program were included two successive directions: the programming of the experiments and experimental dates analyse. Active method of elaboration of empirical models involves obtaining experimental data as a result of controlled experiments (planned). If you give up the classic experimental program in favor of an active experimental program, dependent variable description (optimization parameter) presents a series of advantages, namely: considerable simplification of calculations, decrease the number of experiments, shortened research works and the consumption of raw materials, increasing the accuracy of determination of the regression equation coefficients. In order for the research to present economic efficiency and to be carried out in a timely manner, it is necessary that the experimental part contains a minimum volume of determinations. By rotability the mathematical model obtained through statistical processing of factorial experiment allows to determine the answer, at equal distances from the experiment centre with the same precision, regardless of direction. In a rotable program standard deviation is the same for all points that are at the same distance to the centre of experimental region. The central compose rotable second order program contains experiments in the centre of the circle.
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