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Marine derived fungi are considered as a promising
source of novel drugs due to their biodiversity and consequent chemo-diversity.
Although marine microorganisms especially fungi are not well defined
taxonomically, making this a promising frontier for the discovery of new medicines. This
study focused on marine derived fungi as a model for bioactive exploration for
new entities with anti-inflammatory and antioxidant capacity. Three in-vitro assays were used to investigate
the bioactive antioxidant potentiality of fungal extracts. Thiobarbituric acid
(DPPH) and NO assay are based on their
total phenolic and flavonoid content of each extract group. Ch. globosum
recorded the highest antioxidant activity (92.82%) in TBARS assay, while G. dankaliensis came first by recording
59.28% in DPPH assay in comparison with ascorbic acid (61.83%). In NO
inhibition assay, N. oryzae showed
49.3% comparing with ascorbic acid (73.12%). From the
preliminary result of our extracts, we can consider the marine derived fungi
With the globalization of markets, the multinational production made obvious great strides marked by the proliferation of hybrid or bi-national products. In this context which supported the dissolution of identity of several products’ categories and called in question the weight of origin labels about the consumer behavior purchase. Beyond these reflections, this article proposed to wonder about the relation between globalization and product ethnicity, by analyzing the apparent effects of the current context of globalization on the establishment of stereotypic country-products associations by the consumers. Also, the question which is directed to the development and the presentation of this research is the following one: to what extend does the current context of globalization enable us to call in question the phenomenon of product ethnicity?
The modern nonlinear theory, bifurcation and chaos theory are used in
this paper to analyze the dynamics of the Rikitake two-disk dynamo system. The
mathematical model of the Rikitake system consists of three nonlinear
differential equations, which found to be the same as the mathematical model of
the well-known Lorenz system. The study showed that under certain value of
control parameter, the system experiences a chaotic behaviour. The experienced
chaotic oscillation may simulate the reversal of the Earth’s magnetic field.
The main objective of this paper is to control the chaotic behaviour in
Rikitake system. So, a nonlinear controller based on the slide mode control
theory is designed. The study showed that the designed controller was so
effective in controlling the unstable chaotic oscillations.