铕对小麦根细胞钙调素及NAD激酶的影响研究

研究了Eu对小麦根细胞内钙调素的含量和活性以及对受钙调素调控的专一性酶NAD激酶的影响。结果表明，Eu^3＋有类似Ca^2＋的作用，影响受Ca^2＋浓度调控的信号系统关键蛋白——钙调素的活性和含量变化。从而引起钙调素调控酶NAD激酶的活性改变，最终影响细胞内生理生化过程。认为稀土离子对生物体的Hormesis效应町能与稀土离子对细胞信号传递系统的影响有关，稀土离子可能通过影响细胞信号系统来调节细胞内的各种生理生化变化，形成稀土元素生物效应的多样性特征。     

Two Novel Myrinsol Diterpenes from Euphorbia prolifera

Two novel diterpenes,Euphorprolitherin A(1) and Euphorprolitherin B(2), were isolated from the roots of Euphorbia prolifera. Their structures were elucidated on the basis of spectroscopic methods.     

由卫星互补DNA单体构建的抗黄瓜花叶病毒的烟草基因工程植株

本文将合成的卫星RNA-1的全长cDNA单体重组到含CaMV-35S启动子的植物表达载体ROK_2上,并将此重组质粒转入含Ti质粒的根癌杆菌(Agrobacterium tumefaciens)中,用以感染我国推广烟草品种G-140的叶圆片并再生成植株。经CMV强毒分离物接种后,大部分转化植株有大量卫星RNA表达,并表现出症状的减轻。第二代转基因植物仍保持大量卫星RNA的表达及对CMV的抗性并出现基本符合孟德尔遗传规律的分离。经分离和选育我们可得到纯化的抗病毒品种。     

用丘氏气提定氮器测定植物中的氮

研究了用气提滴定法测定植物中氮的条件和方法．实验结果表明，与蒸馏法相比，方法简便安全，结果准确     

ODA—H2O2—HRP偶合反应伏安酶联免疫分析检测植物病毒GTV,TAV和PVY

将邻联茴香胺（ＯＤＡ）－Ｈ２Ｏ２－辣根过氧化物酶（ＨＲＰ）偶合反应伏安酶联免疫分析新体系，应用于植物病毒葡萄扇叶病毒（ＧＦＶ）、番茄不孕病毒（ＴＡＶ）和马铃薯Ｙ病毒（ＰＶＹ）的测定。该法对以上各种植物病毒叶澄清液的测定的稀释比均高于酶联免疫吸附分析（ＥＬＩＳＡ）法，检测范围均宽于ＥＬＩＳＡ法。     

Two New Steroidal Glycosides from Fermented Leaves of Agave americana

Two new spirostanol glycosides named agamenoside A and B, ere isolated from the fermented leaves of Agave americana. Their structures were elucidated as (23S,25R)-5α-spirostan-3β,6α，23－triol 3-O-α-L-rhamnopyranosyl-(1→3)-β-D-glucopyranosyl-(1→2)-[β-D-xylopyranosyl-(1→3)]-β-D-glucopyranosyl-(1→4)-β-D-galactopyranoside(1) and (25R)-5α-spiro-stan-3β,6α-diol 3-O-β-D-glucopyranosyl-(1→2)-[β-D-xylopyranosyl-(1→3)]-β-D-glucopyra-nosyl-(1→4)-β-D-galactopyranoside(2) by a combination of chemical and spectral methods.     

种植沙生植物--沙棘改善内蒙古地区生态环境

结合内蒙古地区现状，对沙棘的生物学和生态学特性、沙棘属植物化学成分和微量元素及种植沙生植物——沙棘的重要性和必要性进行了详细的研究和探讨。研究表明，沙棘属植物具有极强的生态适应性并富含多种营养成分和生物活性物质，并以耐干旱、耐瘠薄、萌蘖及固氮能力强等特点被称为治理非宜林地水土流失、改善生态环境的先锋树种。种植沙棘是治理内蒙古脆弱生态环境最经济、最有效的措施，是贫瘠的不毛之地发展经济、增加收入的经济树种。另外．种植沙棘的技术简便，容易掌握，投资少，见效快。     

云南药用菊科植物微量元素含量聚类分析

论述了云南３１种药用菊科植物微量元素含量的特征，含量变化为Ｆｅ〉Ｚｎ〉Ｃｕ〉Ｐｂ〉Ｃｒ和Ｆｅ〉Ｍｎ〉Ｃｕ〉Ｐｂ〉Ｎｉ。３１种植物中Ｆｅ、Ｍｎ含量相对较高，Ｃｒ含量相对较低。用系统聚类法，根据欧氏距离，以３．０１８为分类阈值，被分为４组。叶下花、臭灵丹、狭叶免耳风各成一类，余下２８种植物为一类。若以１．４７７为阀值分类，亚组Ⅳ可分为８组，其中组１－山紫苑、滇川还阳参、夏田菊、牛蒡；组２－双股箭、马兰     

Ab Initio Study on the Anti-HIV Activities of Hydroxyflavones

1 INTRODUCTION AIDS, in other words, Acquired Immunodefici-encysyndrome, is a viral contagious disease withhigh death rate. However, effective treatment againstit has not appeared so far. At present, about 100kinds of natural compounds that could be extractedfrom natural products or artificially synthesized havebeen found to have anti-HIV activities to some ex-tent. They belong to flavonoid, terpenoid, steroid, cou-marin, peptide, alkaloid etc., respectively. Previousstudies show that…