多路电源任意电流分配控制系统

 针对目前电源供电模块受功率大小影响的不足,提出了解决方案。设计出一种由三路DC/DC变换器并联组成的输出电流任意比例分配的电源供电模块。整个系统由DC/DC变换器、采样电路、控制电路、按键显示电路等模块组成。开关电源三路主回路都输入12 V DC,通过升压斩波电路,变换为20~30 V DC输出;主控制器为STC12C516S2单片机。主控制器和TL494以双闭环形式控制DC/DC变换电路,既能通过电压反馈控制稳定输出电压,又能通过电流反馈对输出电流任意分配比例控制。且该系统还有过流保护功能。     

桑沟湾栉孔扇贝养殖容量的研究

通过计算单位面积的初级生产量生产的有机碳供应量、单位面积滤食性附着生物量及其对有机碳的需求量，首次对桑沟湾栉孔扇贝养殖容量进行了估算。结果显示，当栉孔扇贝壳高为３￣４ｃｍ时，其养殖总容量为１１０亿粒左右，单位面积养殖容量估算值为９０粒／ｍ＾２；当壳高为４￣５ｃｍ时，其养殖总容量降为７５亿粒，单位面积养殖容量估算值为６０粒／ｍ＾２；当壳高为５￣６ｃｍ时，其养殖总容量仅为４０亿粒，单位面积养殖容量为３     

棉花不同抗、感蚜虫品种的多酚氧化酶同工酶分析

棉花不同抗、感蚜性品种的幼嫩花蕾多酚氧化酶（ＰＰＯ）同工酶分析结果表明，感蚜品种酶带多，但弱带比例大。相反，抗蚜品种酶带少，且多为强带。ａ带（Ｒｆ０．０１）、ｂ带（Ｒｆ０．０８）和ｄ（Ｒｆ０．９６）是各品种共有带，其带的峰值大小与抗蚜性呈正相关。ＵＶＰ扫描分析结果显示，ｃ带（Ｒｆ０．５５）只存在于感蚜品种。本文结果可应用于棉花抗蚜性鉴定及其育种上。     

危害沙棘种子的新象虫—沙棘象

危害沙棘(Hippophae rhamnoides L.)种子的害虫——沙棘象,隶属于象虫科(Curculionidae)象虫属(Curculio Linnaeus)为一新种。分布于陕北、渭北、关山等地,严重影响沙棘种子产量和果实利用价值。模式标本保存于中国科学院动物研究所。     

新疆棉区棉蚜控制策略探讨

阐述了应从新疆特殊的自然环境条件特点出发,以生态治理为根本策略,科学地治理棉蚜危害的观点。     

辽宁兴城油松种子园球果害虫的研究

1984～1988年在辽宁省兴城油松种子园对直接危害油松球果的害虫进行了调查,发现有松果梢斑螟、微红梢斑螟、松实小卷蛾及金绿宽盾蝽,对这4种害虫的生活史、发生历期和生物学特性作了研究。     

进口原木截获松皮双凸象的鉴定及其风险

本文提供了福建省莆田出入境检验检疫局从来自澳大利亚澳洲辐射松原木截获的松皮双凸象的形态鉴定特征,其寄主植物种类为多种松属和杉属植物,其幼虫在树皮下危害,成虫和幼虫均易随原木远距离传播扩散。松皮双凸象对我国南方针叶树构成一定威胁,对从澳大利亚进口的针叶树原木需加强检疫以防止其入侵危害。     

QTL mapping for developmental behavior of plant height in wheat (<Emphasis Type="Italic">Triticum aestivum</Emphasis> L.)

A recombinant inbred line (RIL) population with 305 lines derived from a cross of Hanxuan 10 × Lumai 14 was used to identify the dynamic quantitative trait loci (QTL) for plant height (PH) in wheat (Triticum aestivum L.). Plant heights of RILs were measured at five stages in three environments. Total of seven genomic regions covering PH QTL clusters on different chromosomes identified from a DH population derived from the same cross as the RIL were used as the candidate QTLs and extensively analyzed. Five additive QTLs and eight pairs of epistatic QTLs significantly affecting plant height development were detected by unconditional QTL mapping method. Six additive QTLs and four pairs of epistatic QTLs were identified using conditional mapping approach. Among them, three additive QTLs (QPh.cgb-1B.3, QPh.cgb-4D.1, QPh.cgb-5B.2) and three pairs of epistatic QTLs (QPh.cgb-1B.1–QPh.cgb-1B.3, QPh.cgb-2A.1–QPh.cgb-2D.1, QPh.cgb-2D.1–QPh.cgb-5B.2) were common QTLs detected by both methods. Three QTLs (QPh.cgb-4D.1, QPh.cgb-5B.3, QPh.cgb-5B.4) were expressed under both drought and well-water conditions. The present data are useful for wheat genetic manipulations through molecular marker-assisted selection (MAS), and provides new insights into understanding the genetic mechanism and regulation network underlying the development of plant height in crops. Our result in this study indicated that combining unconditional and conditional mapping methods could make it possible to reveal not only the stable/conserved QTLs for the developmental traits such as plant height but also the dynamic expression feature of the QTLs.     

粉蓝烟草（Nicotiana glauca）花柱S-RNase的活性及其表达特异性研究

报道了粉蓝烟草自交不亲和性花柱S-基因产物的性质及时空表达特征。花柱S-基因产物是一种特异的糖蛋白（即S-糖蛋白）,具有极高的Rnase活性,因此又称S-Rnase。#+（32）P标记花粉RNA实验显示,授粉48h后,亲和性花粉管已生长进入子房,而自交不亲和性花粉管的rRNA含量急剧降低,并在花柱上半部特定区域停止生长。由此可推知,花柱S-Rnase通过与自交花粉管特异性识别进入管内分解rRNA,使花粉管蛋白质合成受阻,最终导致自交不亲和性反应。     

粉蓝烟草(Nicotiana glauca)花柱S-糖蛋白的发达及对花粉管生长的影响

Self-incompatibility in flowering plants is controlled by the S-gene,encoding stylar S-glycoproteins. The isolation of the stylar glycoprotein which is the likely product of the S-gene in Nicotiana glauca has been described previously. In this paper we reported the expressiot of stylar S一glycopro