西洋参与人参中人参皂甙含量的比较

采用ＴＬＣ和ＨＰＬＣ方法分析比较西洋参（Ｐａｎａｘ ｑｕｉｎｑｕｅｆｏｌｉｕｍ Ｌ．）、人参（Ｐ．ｇｉｎｓｅｎｇ Ｃ．Ａ．Ｍｅｙ．）及其加工品红参（ｒｅｄ ｇｉｎｓｅｎｇ）,以及不同规格的西洋参中人参皂甙的含量。结果表明,西洋参中人参皂甙总量及人参二醇型皂甙的含量明显高于人参及红参,且含有１种人参及红参中未发现的未知人参皂甙Ｒｘ,但不含人参及红参中含有的Ｒｆ;人参中人参二醇型皂甙的含量高于人参三醇     

人参皂甙Rg1抗衰老和促智作用及其机制研究

现代研究证明,人参皂甙Ｒｇ_１是人参“益智延年”的主要有效成分。本研究以老年动物为实验对象,首次发现Ｒｇ_１能选择性增强老年大鼠免疫功能,改善老年大鼠的行为活动和操作能力,提高青、老年大鼠海马神经细胞功能,促进海马细胞内ｃ－ｆｏｓ基因的表达,并对抗谷氨酸介导的神经毒作用以及对原代培养的大鼠海马神经细胞表现出一定的保护作用,从而为Ｒｇ_１抗衰老和促智作用及其机制的研究提供了新的实验证据。     

模拟微重力环境因子对人参细胞生长和人参皂苷含量的影响

与在正常重力条件培养下的对照相比,经回转器水平回转处理的人参细胞鲜重和干重均增加,人参皂苷含量提高１０％左右。在去Ｃａ６２＋培养基上生长的人参愈伤组织细胞,经回转器水平回转３周后,人参皂苷含量约为正常重力条件下培养细胞的倍。另外,在试验范围内,如果培养基中直始钙离子浓度越高,则其培养的人参细胞中人参皂苷含量越低。     

氧水平对密闭系统中贮藏鲜人参呼吸作用的影响

利用气调技术贮藏鲜人参的研究近年来已有一些报道但对决定其气调贮藏指标的氧气和二氧化碳的最低和最高忍耐点的研究尚未见报道.结合小包装、限气人参保鲜试验工作,我们研究了氧水平对密闭系统中贮藏鲜人参呼吸作用的影响.为有效地实施鲜参气调贮藏工作提供了依据. 一、材料与方法     

野山参叶,园参叶和西洋参叶与氨基酸含量

报道了野山参叶中氨基酸的含量并与园参叶,国产西洋参中氨基酸含量进行了对比分析。     

六种藓类植物茎的比较解剖学研究

通过对6种藓类植物,即褶叶青藓(Brachythecium salebrosum(Web.et Mohr.)B.S.G.)、湿地匐灯藓(Plagiomnium acutum(Lindb.)Kop.)、侧枝匐灯藓(Plagiomnium maximoviczii(Lindb.)Kop.)、大凤尾藓(Fissidensnobilis Griff.)、大羽藓(Thuidium cymbifolium(Doz.et Molk.)B.S.G.)和大灰藓(Hypnum plumaeforme Wils.)嫩茎和老茎的石蜡切片和显微观察发现,同一藓类植株的嫩茎和老茎,茎结构稳定,不同种藓类植物茎横切面具有不同特征.植物体茎横切面形状、表层细胞的层数、细胞大小和细胞壁厚薄、皮层细胞大小和形状、中轴的有无以及比例等特征可以作为藓类植物的分科分类依据之一.     

Investigation of the mechanism of temperature sensitivity of the electroreceptors of ampullae of lorenzini

In experiments on Black Sea skates (Raja clavata), the potential of the receptor epithelium of the ampullae of Lorenzini and spike activity of single nerve fibers connected to them were investigated during electrical and temperature stimulation. Usually the potential within the canal was between 0 and –2 mV, and the input resistance of the ampulla 250–400 k. Heating of the region of the receptor epithelium was accompanied by a negative wave of potential, an increase in input resistance, and inhibition of spike activity. With worsening of the animal's condition the transepithelial potential became positive (up to +10 mV) but the input resistance of the ampulla during stimulation with a positive current was nonlinear in some cases: a regenerative spike of positive polarity appeared in the channel. During heating, the spike response was sometimes reversed in sign. It is suggested that fluctuations of the transepithelial potential and spike responses to temperature stimulation reflect changes in the potential difference on the basal membrane of the receptor cells, which is described by a relationship of the Nernst's or Goldman's equation type.I. P. Pavlov Institute of Physiology, Academy of Sciences of the USSR, Leningrad. I. M. Sechenov, Institute of Evolutionary Physiology and Biochemistry, Academy of Sciences of the USSR, Leningrad. Pacific Institute of Oceanology, Far Eastern Scientific Center, Academy of Sciences of the USSR, Vladivostok. Translated from Neirofiziologiya, Vol. 12, No. 1, pp. 67–74, January–February, 1980.