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In order to study the characteristics of the changes in the contents of K, Ca and Mg in pericarp and its effects on the pericarp's coloring of Ziniangxi litich, a study based on the pericarp was finished. The characteristics of the tendencies of the changes in the contents of K, Ca and Mg and the indicators of coloring in pericarp were detected, and the relationship between the changes in the contents of 3 kinds of mineral nutrients and the pericarp's reddening were analyzed by the methods of the canonical correlation analysis and the unitary exponential regression analysis. The results in the course of the development of the pericarp's reddening were as follows: The content of chlorophyll in pericarp decreased significantly while the content of anthocyanin in pericarp increased significantly. The contents of the total K, the water-soluble K and the total Ca, the water-soluble Ca generally dropped and rose respectively. The content of the water-soluble Mg generally rose. The content of the total Mg changed insignificantly. The contents of the total K, Ca and Mg and those of the water-soluble K, Mg and Ca respectively decreased significantly in sequence at the same time. The unitary exponential regression equations of the content of the anthocyanin to those of the total Ca and K respectively were both significant, and the correlation was respectively positive and negative. The unitary exponential regression equations of the content of the chlorophyll to those of the water-soluble Mg and the total Ca and K were all significant respectively, meanwhile, the former two were both negative, and the latter was positive. In summary, the higher content of the total Ca was the key factor improving the pericarp's reddening, and it would guide to formulate the technical proposals on the fertilizer application for improving the pericarp's reddening of Ziniangxi litchi. [ABSTRACT FROM AUTHOR]

Chemical constituents in soft coral Sarcophyton glaucum were separated and purified by various chromatographic methods. Based on the spectral data, physicochemical properties, and comparison with the data reported in the literature, nine cembranoids, including a new cembranoid named sefsarcophinolide(1) together with eight known cembranoids, namely(+)-isosarcophine(2), sarcomilitatin D(3), sarcophytonolide J(4),(1S,3E,7E,13S)-11,12-epoxycembra-3,7,15-triene-13-ol(5), sarcophytonin B(6),(-)-eunicenone(7), lobophytin B(8), and arbolide C(9), were identified. As revealed by biological activity experiment results, compounds 2-6 had weak acetylcholinesterase inhibitory activity, and compound 5 displayed weak cytotoxicity against K562 tumor cell line.