国产麻黄的形态组织学研究——Ⅰ.北方主产的七种麻黄

据文献记载和作者的调查,我国产麻黄属(Ephedra)植物共有13种3变种1变型。本文报道我国北方生产的7种麻黄生药形态组织学比较研究结果。7种麻黄是:草麻黄Ephedra sinica Stapf、木贼麻黄E.equisetina Bunge、中麻黄E.intermedia Schrenk ex Mey.、膜果麻黄E.przewalskii Stapf,单子麻黄E.monosperma Gmel.ex Mey.、雌雄麻黄E.fedtschenkoae Pauls和细子麻黄E.reaeliana Florin。文中附有生药性状与组织构造特征比较表及生药组织图。     

Intracranial circulation: preliminary clinical results with three- dimensional (volume) MR angiography

The authors assessed the clinical utility of a magnetic resonance angiography technique in the evaluation of intracranial circulation. Eighteen patients with a low likelihood of cerebrovascular disease (control group) and 40 patients with suspected cerebrovascular disease were imaged with a FISP (fast imaging with steady precession) sequence (repetition time of 50 msec, echo time of 15 msec, velocity compensation in the read and section-select directions with acceleration compensation in the read direction, 15 degrees anisotropic volume, and a 1.25-mm partition thickness). Ninety-four percent of images in the control group and 72% of images in the group with cerebrovascular disease were considered useful for diagnosis. This technique can provide accurate images of intracranial circulation and can be performed in conjunction with two-dimensional spin-echo or gradient-echo imaging. It was most useful in the evaluation of patent intracranial aneurysms, vessel displacement, and large-vessel occlusive disease. Disadvantages included limited field of view, persistent signal voids, limited spatial resolution, and inadequate depiction of lesions with slow flow.     

白木通多糖的研究

用碱液从白木通(Akebia trifoliate)茎中提取所得的粗多糖ATB经DEAE-Celulose及SephadexG-200柱层析后得到一多糖纯品ATBB 2,其分子量为2.3×10⁵。糖组分分析ATBB-2中各糖残基的摩尔比为Rha∶Ara∶Xyl∶Gal∶Glc∶GalA=1.22∶1.00∶1.10∶0.85∶0.24∶0.82。经甲基化,高碘酸氧化,Smith降解,部分酸水解,¹H和¹³CNMR谱的分析揭示ATBB-2是一个结构复杂的杂多糖。