AT试剂对春茶光合生产的调控研究

应用ＡＴ试剂处理春茶，能提高越冬留养叶的光合速率，加速光合产物输出，增加叶片叶绿素含量，增加新梢的干物质积累。ＡＴ试剂在提高光合速率的同时，还使硝酸还原酶和过氧化氢酶活性下降。     

HPMBP与Phen衍生物对稀土的协同萃取研究

本文研究了1—苯基—3—甲基—4—苯甲酰基吡唑酮—5(HPMBP,HA)与1,10—菲咯啉(phen)及其衍生物(2,9—二甲基1,10—菲咯啉,DMphen;4,7—二苯基1,10—菲咯啉Bathophen的氧仿溶液对轻重稀土(Pr,Nd,Ho,Er)的协同萃取,用斜率法确定了各萃合物的组成均为REA_3B,(B代表phen或其衍生物)并求出了各稀土离子的协萃平衡常数Kse。结果说明,HPMBP与phen类双齿含氮中性萃取剂对稀土均有较强的协萃效应,但phen上取代基不同,协萃效果也不同,无论是轻或重稀土,其Kse均是Bathophen>phen>DMphen.Bathophen(下面用Bphen表示)的Kse要比phen的大4—10倍,而DMphen的则要比phen的小2—4个数量级。前者是由于增大了萃合物的共轭平面,所以稳定性增加,后者则是受空间位阻的影响,稳定性减小。用饱和萃取法制得了Ho·A_3·Bphen,元素分析结果,萃合物符合HoA_3·phen组成。同时测定了该萃合物的紫外、红外光谱。     

Plant growth stimulation by inoculation with symbiotic and associative rhizosphere microorganisms

SelectedRhizobium bacteria, arbuscular mycorrhiza-forming (AM) fungi and associative bacteria have been shown to stimulate the growth of legumes, gramineae and cruciferae in field experiments on different soil types in temperate regions. A combination of microorganisms with different metabolic capacities (N₂-fixation, P-mobilization; production of phytohormones and antibiotics) can partly surpass the effect of single inoculations, or can produce a positive effect where single inoculations are ineffective. Growth stimulation by inoculation requires microorganisms with phytoeffective metabolic characteristics and the ability to survive in the rhizosphere during the growth period. Another prerequisite is an adequate supply of plant assimilates for the production of microbial phytoeffective metabolites. Type of inoculum, method of inoculation and agricultural measures can influence the effect of the inoculation. Research is necessary to extend our knowledge both of basic principles, and about using microorganisms in practice.     

全程序微波辐射制备高等植物SEM样品的研究

本文以五种豆科植物和一种禾本科植物为材料，较为详细地研究和摸索了全程序微波辐射制备高等植物扫描电镜（ＳＥＭ）样品的条件和方法。结果表明。几种植物均能通过全程序微波辐射（包括半程序微波辐射）制得理想的ＳＥＭ样品。微波辐射制样的适宜条件为：固定、脱水、置换时的浸泡液终止温度３０±２℃，干燥终止温度７０±３．℃干燥时间３一一４ｍｉｎ。     

稀土烯丙基化合物的研究（Ⅺ）──钆、镝、钬、铒和镱的镁烯丙基四甲基乙二胺配合物的合成

低温时，以四甲基乙二胺（ｔｍｅｄ）作稳定剂，用无水稀土氯化物与烯丙基氯化镁在四氢呋喃中反应，合成了对空气和湿气相当敏感的稀土镁烯丙基四甲基乙二胺配合物（Ｃ３Ｈ５）２ＬｎＣｌ５Ｍｇ２（ｔｍｅｄ）２（Ｌｎ＝Ｇｄ，Ｄｙ，Ｈｏ，Ｅｒ，Ｙｂ）配合物的组成经元素分析、红外光谱、质谱等鉴定以及摩尔电导的测定．还进行了配合物与二氧化碳或含活泼氢的化合物的反应．     

积分惯性型对象的时间和燃料综合最优控制

本文应用庞特里雅金最小值原理,得到积分惯性型对象的时间和燃料综合最优控制的必要条件,求得了不同初始点情况下的最优控制作用,得到了以性能指标中加权系数ρ和对象参数κ、T为参变量的切换线方程,综合了作为状态变量函数的最优控制律u(x_1,x_2)作出了最优控制器和闭环系统的方框图。     

二十七点九态控制器及其三阶对象仿真分析

介绍二十七点九态控制器的模型和控制作用。此控制器将相空间分为二十七个工作区域，而被控对象由九条不同规则控制。在此控制器作用下对不同的三阶对象进行稳定性仿真分析及其正弦跟踪分析，可得出结论：无论三阶对象是否稳定，在此控制器作用下对于不同的三阶对象可以达到满意的控制效果。     

Growth,development, feeding preference,and food consumption and utilization by tobacco hornworm on tobacco mosaic virus-infected and non-infected tobacco leaves

Summary Plant disease may cause a variety of changes in plants which influence their suitability to insect herbivores. The reported physiological changes in tobacco due to infection by tobacco mosaic virus have the potential to influence the feeding, growth and behavior of the tobacco hornworm,Manduca sexta. However, feeding on foliage of systematically infected plants had no statistically significant effects on development time, mean pupal weight or the amount of foliage consumed by 4th instars. Although an initial preference was exhibited by larvae for healthy leaves after about 72 h no differences were observed. These results do not support the results of previous research on the influence of tobacco mosaic virus-infected plants on the tobacco hornworm.Scientific contribution No. 8130, article No. A-5071, of the Maryland Agricultural Experiment Station, Department of Entomology     

稀土对薏苡种子活力及产量因素的影响

研究了稀土浸种对薏苡种子活力及构成产量因素的影响，结果表明稀土浸种能明显促进薏苡种子活力，并提高构成产量的因素，浸种浓度以０．００５ｇ．Ｌ＾－１和０．０５ｇ．Ｌ＾－１最好。     

应用RE_SAF_phen_CTMAB显色反应分光光度测定希土总量

本文报导测定希土总量的一种新的分光光度方法.利用形成四元配合物[希土(RE)—水杨基莹光酮(SAF)—邻菲啰啉(phen)—溴化十六烷基三甲铵(CTMAB)〕测定希土总量,测定的pH值为9.5;测定的波长为570—58nm;各种希土配合物的表观摩尔吸光系数为(1.0 5—1.51)×10~5升·摩尔·厘米.在特定的条件下,不同希土配合物显色反应的强度近乎相同,配合物组成RE:SAF=1:2.本文还叙述了外来离子干扰情况及其消除办法.此法已用于测定土壤、岩石和矿石样品的希土总量.