青海省西宁种植山莨菪中重金属元素特征

青海地道中藏药材山莨菪人工引种栽培试验成功。采集两年生和三年生种植山莨菪在不同生长期的植物全植株,采用流动注射氢化法原子吸收光谱分别测试了其不同组织中铅、砷、汞、镉等重金属元素含量。结果表明,山莨菪在生长周期内吸收的重金属元素并非全部蓄积在根组织器官中,部分重金属元素通过年生长周期内的生长发育而随着地上茎叶部分等组织器官的枯萎被代谢排出植物体外。     

Three new acyltyramines from Anisodus luridus Link et Otto (Solanaceae)

Three new acyltyramines, N-[2-(4-hydroxyphenyl)ethyl]hentriacontanamide (1), N-[2-(4-hydroxyphenyl)ethyl]nonacosanamide (2) and N-[2-(4-hydroxyphenyl)ethyl]heneicosanamide (3) have been isolated from n-hexane extract of leaves of Anisodus luridus (Solanaceae). Successive extraction of defatted leaves of A. luridus with methanol afforded a residue on removal of solvent under reduced pressure. Residue was partitioned by means of chloroform and n-butanol. Chromatographic resolution of n-BuOH extract afforded six known compounds, apigenin (4), luteolin (5), quercetin (6), quercetin 3-O-α-l-rhamnoside (7), kaempferol 3-O-α-rhamnoside (8) and quercetin 3-O-α-l-rhamnopyranosyl-(1→6)-β-d-glucopyranoside (9). The structures of the isolated compounds were assigned with the help of spectroscopic techniques. This is the first report of isolation of these compounds from this plant.     

Bishyoscyamine, one unusual dimeric tropane alkaloid from Anisodus acutangulus

One unusual dimeric tropane alkaloid, bishyoscyamine, was isolated from the roots of Anisodus acutangulus, whose structure including the absolute stereochemistry was unambiguously determined based on extensive 1D NMR and 2D NMR, HR-ESI-MS [α]D and CD spectroscopic analyses. To our knowledge, bishyoscyamine is the first example of tropane alkaloid dimer condensed by a C-N bond.     

青海种植山茛菪根部重金属元素特征

采集2～7年生人工种植山莨菪,用原子荧光光谱仪测定了镉、砷、汞,原子吸收光谱仪测定铅。结果表明,2—7年生种植山莨菪在每年9月份中,4种重金属元素含量水平由高到低依次为：砷、镉、铅、汞;铅和镉、砷和铅、且砷和镉之间均存在一定相关性。各种重金属的含量随着年份和生物量的增加而有所积累。