| strepchazolins a and b: two new alkaloids from a marine streptomyces chartreusis na02069. | two new alkaloids, strepchazolins a (1) and b (2), together with a previously reported compound, streptazolin (3), were isolated from a marine actinomycete, streptomyces chartreusis na02069, collected in the coast of hainan island, china. the structures of new compounds were determined by extensive nmr, mass spectroscopic and x-ray crystallographic analysis, as well as modified mosher's method. compound 1 showed weak anti-bacillus subtilis activity with the mic value of 64.0 μm, and weak inhibit ... | 2017 | 28767052 |
| diversity and antimicrobial activity of endophytic fungi isolated from cephalotaxus hainanensis li, a well-known medicinal plant in china. | about 1051 endophytic fungi were isolated from leaves, branches, barks and stems of cephalotaxus hainanensis li from four sites in hainan, china. the fungi were identified as 21 genera by morphology and its sequences. one dominant species was phomopsis quercella in hainan tropical botanical garden and bawangling nature reserve, with relative frequency of 42·06 and 34·88% respectively. another dominant species was colletotrichum boninense in wuzhishan and jianfengling nature reserves, with relati ... | 2015 | 26280451 |
| antibacterial constituents of hainan morinda citrifolia (noni) leaves. | noni (morinda citrifolia l.) is an edible and medicinal plant distributed in hainan, china. the antibacterial activities of the extracts of water (we), petroleum ether (pee), ethyl acetate (eae), chloroform (ce), and n-butanol (be) were assayed by the disk diffusion method. the results showed that the extracts from noni leaves possessed antibacterial effects against bacillus subtilis, escherichia coli, proteus vulgaris, and staphylococcus aureus. among 5 different extracts, the be produced the b ... | 2016 | 27074391 |