Foshan University

About: Foshan University is a education organization based out in Foshan, China. It is known for research contribution in the topics: Catalysis & Adsorption. The organization has 3906 authors who have published 4171 publications receiving 40027 citations.

The Chemical Investigations of the Mangrove Plant Avicennia marina and its Endophytes

Abstract: A diverse array of bioactive compounds have been isolated and characterized from the mangrove plant Avicen- nia marina and its endophytes. Extensive chemical investigations of the different parts (barks, leaves, twigs, etc.) of the mangrove plant A. marina and its endophytes (mainly endophytic fungi) resulted in the reporting of the isolation of 123 compounds, and most of them are new or novel compounds. Most of compounds produced by the endophytes were differ- ent from the chemical components of the host A. marina, but it can still be found that some metabolites of the endophytes and some chemical components of the host possess the same structure unit. It suggested that there exist some biogenetic relationships between the endophytes and its host. Their biological activities, structural and stereochemical assignments are reported.

A simple method to determine the critical buckling loads for axially inhomogeneous beams with elastic restraint

Abstract: In this paper, a new and simple approach is presented to exactly calculate the critical buckling loads of beams with arbitrarily axial inhomogeneity. For various end boundary conditions, we transform the governing equation with varying coefficients to linear algebraic equations; then a characteristic equation in critical buckling loads will be obtained. Several examples of estimating buckling loads under typical end supports are discussed. By comparing our numerical results with the exact and existing results for homogeneous and nonhomogeneous beams, it can be found that our method has fast convergence and the obtained numerical results have high accuracy. Moreover, the buckling behavior of a functionally graded beam composed of aluminum and zirconia as two constituent phases is investigated for axially varying material properties. The effects of gradient parameters on the critical buckling loads are elucidated. Finally, we give an example to illustrate the enhancement of the load-carrying capacity of tapered beams for admissible shape profiles with constant volume or weight. The proposed method is of benefit to optimum design of beams against buckling in engineering applications.