| anti-tuberculosis activity of quassinoids. | in vitro evaluation of anti-tuberculosis activity was conducted for fifty-six quassinoids isolated in our laboratory from simaroubaceous plants, ailanthus altissima (= aa, 10 compounds), brucea antidysenterica (= ba, 16 compounds), picrasma ailanthoides (= pa, 14 compounds), and brucea javanica (= bj, 16 compounds). of the compounds tested, shinjulactone k (1), ailanthone (2), shinjudilactone (3), and dehydrobruceantin (4) were the most potent. although the activities were very low (0-19%), the ... | 1997 | 9332005 |
| two new quassinoids, ailantinols a and b, and related compounds from ailanthus altissima. | | 1996 | 8759166 |
| contact reaction to the tree of heaven. | | 1994 | 8187524 |
| evidence for allelopathy by tree-of-heaven (ailanthus altissima). | ailanthus altissima (mill.) swingle contains one or more phytotoxic compounds in roots and leaves. activity is higher in roots, where it occurs primarily in the bark. powdered root bark and leaflets strongly inhibited growth of garden cress (lepidium sativum l.) when mixed with soil in petri dishes (id50 values=0.03 g root bark, 0.6 g leaflet/dish). the toxic material was readily extracted by methanol but not dichloromethane. pieces of root bark mixed with soil at 2, 1, and 0.5 g/pot reduced cre ... | 1990 | 24264005 |
| a new beta-carboline alkaloid from ailanthus altissima. | a new indole alkaloid, 1-methoxycarbonyl-4,8-dimethoxy-beta-carboline ( 1a) was isolated from the leaves of ailanthus altissima and its structure elucidated by spectroscopic methods; 1-methoxycarbonyl-beta-carboline ( 1b) was also identified. | 1989 | 17262417 |
| comparison of biological activity induced by ailanthus altissima plant or cell cultures extracts. | | 1988 | 3247351 |
| a demonstration of photosynthetic state transitions in nature : shading by photosynthetic tissue causes conversion to state 1. | photosynthetic state transitions occurring in nature are demonstrated. chenopodium album leaves converted to state 1 and ailanthus altissima leaves converted to an intermediate position between state 2 and state 1 at a time of day when these leaves were shaded by the canopy on a sunny day, while both plants' leaves were in state 2 at a time of day when they were not shaded. filtering of white light by flasks of green algae also converted the light from causing state 2 in chlorella vulgaris to ca ... | 1988 | 24429771 |
| evidence for involvement of ketoglutarate in the biosynthesis of canthin-6-one from cell cultures of ailanthus altissima. | (13)c enrichments at c-3, c-4, c-5 and c-6 of canthin-6-one from cell cultures of ailanthus altissima supplemented with [1-(13)c], [2-(13)c] and [1,2-(13)c] acetate, give evidence of the involvement of ketoglutarate as an intact precursor in the biosynthetic pathway. | 1988 | 24241603 |
| studies on ailanthus altissima cell suspension cultures. uptake of l-[methyl-(14)c]methionine and incorporation of label into 1-methoxycanthin-6-one. | time-course studies of the uptake of l-[methyl (14)c]-methionine have shown rapid uptake by ailanthus altissima cells when fed at weekly stages throughout the growth cycle. the radio-label from [(14)c]-methionine was shown to be incorporated into 1-methoxycanthin-6-one with the highest level of incorporation being achieved with cells fed late in the growth phase. | 1987 | 24248663 |