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R. V. Men’shova S. P. Ermakova S. M. Rachidi A. H. Al-Hajje T. N. Zvyagintseva H. M. Kanaan 《Chemistry of Natural Compounds》2012,47(6):870-875
The variation of the polysaccharide composition of the brown alga Padina pavonica from the Mediterranean Sea was studied as a function of the collection season (April–July). It was shown that the principal
polysaccharide (8.0-13.3% of dry alga weight) was alginic acid. Its content did not undergo significant changes from April
to July. The content of water-soluble polysaccharides (laminarans and fucoidans) was low (<0.3% of dry alga weight). Water-soluble
polysaccharides of the studied alga were practically pure fucoidan. The amount of laminarans was insignificant (<0.01% of
dry alga weight). The content of fucoidans increased in alga samples from May through July. It was shown that P. pavonica is a promising source of alginic acids, which have a high capacity for gelation, and fucoidans, which exhibit antitumor action
against RPMI-7951 human melanoma cells. 相似文献
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In this note, we propose an explicit representation with the nested sums for the entries of the inverses of general tridiagonal nonsingular matrices. Its equivalence with other particular representations, based on the combinatorial expressions or the continued fractions, is considered. In addition, an analytical representation for the entries of the finite sections of the resolvent of Jacobi matrices, in terms of its related orthogonal polynomials, is observed. 相似文献
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Farid Rachidi Mutale-joan Chanda Redouane Benhima Mernissi Najib EL Abderahime Aasfar Laila Sbabou Arroussi Hicham EL 《Applied biochemistry and biotechnology》2019,188(1):225-240
Applied Biochemistry and Biotechnology - Microalgae are photosynthetic microorganisms that produce several bioactive molecules that have received considerable attention in scientific and industrial... 相似文献
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We study here some linear recurrence relations in the algebra of square matrices. With the aid of the Cayley–Hamilton Theorem, we derive some explicit formulas for An (nr) and etA for every r×r matrix A, in terms of the coefficients of its characteristic polynomial and matrices Aj, where 0jr−1. 相似文献
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This paper is devoted to the study of some formulas for polynomial decomposition of the exponential of a square matrix A. More precisely, we suppose that the minimal polynomial MA(X) of A is known and has degree m. Therefore, etA is given in terms of P0(A),…,Pm−1(A), where the Pj(A) are polynomials in A of degree less than m, and some explicit analytic functions. Examples and applications are given. In particular, the two cases m=5 and m=6 are considered. 相似文献
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Journal of Dynamics and Differential Equations - The current work is the third of a series of three papers devoted to the study of asymptotic dynamics in the following parabolic–elliptic... 相似文献