不同栽培基质和激素对竹节树生长及生理生化的影响研究

通过不同的栽培基质和激素对竹节树（Carallia brachiata）幼苗进行处理,结果表明：不同基质间竹节树幼苗地径、叶片叶绿素b含量和质膜透性有显著差异（P<0.05）;不同激素间竹节树幼苗地径、叶片质膜透性有极显著差异（P<0.01）,而苗高、叶绿素a、叶绿素b和总叶绿素含量差异不显著;传统基质60%黄心土+40%塘泥有利于竹节树幼苗苗高、地径生长,改良基质30%黄心土+30%菇渣+40%塘泥则对其生理生化指标有促进作用;使用激素可以提高竹节树幼苗地径、苗高生长,降低其质膜透性,100 mg/LIBA溶液可促进其苗高生长,IBA100mg/L+NAA 50mg/L可提高地径生长、降低叶片质膜透性。     

不同更新方式的米槠林经营效果评价

对福建三明不同更新方式的米槠林经营效果进行定量评估.结果表明:林分蓄积连年生长量、林分生产力:人促更新＞人工造林＞天然更新;林分生物量:人促更新＞天然更新＞人工造林.营林生产每hm2、每年投资:人工造林＞人促更新＞天然更新.活立木蓄积年增长经济价值和间接经济价值:人促更新＞人工造林＞天然更新.3种更新方式的林分间接经济价值远大于直接经济价值.     

慈姑种子发芽特性研究

以野生型慈姑巢湖野慈、棠梨店慈和栽培型慈姑浙江农大慈、南宁家慈为试材,从贮藏方法、光照、温度等方面对慈姑种子萌发特性进行了初步探讨。结果显示:慈姑种子需要浸水贮藏,低温水浸贮存更有利于种子萌发,干燥贮存导致种子不能萌发;光照对慈姑种子萌发有明显促进作用;慈姑种子最适发芽条件为25℃、12h/12h(L/D);不同基因型慈姑种子的发芽率存在差异,野生型慈姑明显高于栽培型慈姑。     

Searching and cloning of differentially expressed genes in liver tumor by restriction fragment differential display PCR

AIM:The aim of this study was to isolate and clone the liver tumor-associated genes by restriction fragment differential display PCR (RFDD-PCR) methods that developed recently. METHODS:Total RNA was extracted from primary carcinoma of the liver and adjacent noncancerous tissue separately. The method of RFDD-PCR was used to search for the differentially expressed genes. Each gene segment was sequenced after cloning. The sequence homogeneity were analyzed and compared with BLAST through Internet. The data were then transported into the Translated BLAST Searches to acquire the related information such as the corresponding protein function. RESULTS:Eighteen cDNA bands were found significantly different at their expression levels with 16 higher and 2 lower in primary carcinoma of the liver cells. Three of them were selected to reamplication by PCR, and then were cloned, identified and sequenced. One of them had no homology as compared with known genes and was likely to be a new one. One had relatively high homology with human ribosomal protein genes (86%). The other one has relatively high homology with selenoprotein P genes (98%). CONCLUSIONS:Compared with DDRT-PCR method, RFDD-PCR is better for rapid screening of the differentially expressed genes. It is simple, sensitive, reproducible and less false positiveness. Three differentially expressed genes are found, their functions and another 15 genes need further analysis.     

江西棉铃虫暴发成因浅析及防治对策

本文从气候变化、耕作制度变革等方面分析了2000年江西棉铃虫暴发原因，提出了相应的以灭蛾，杀卵为关键的防治对策。     

马尾松半同胞子代测定及速生优良家系和个体选择

对福建三明中村试验点的马尾松半同胞子代测定林9年生和16年生时进行调查研究,结果表明,2个年度的生长性状在家系间差异都达到显著或极显著水平;对2个年度入选家系进行比较,认为马尾松早期选择是积极有效的,有利于增强预测和测定的可靠性,优化育种程序;以材积为主要指标,从参试的70个家系中选出7个速生家系和13株速生个体,增产效果显著。     

我国图书馆未来的主流体制模式——总分馆制

介绍了图书馆"总分馆制"及其优点.并结合我国目前实行总分馆制的情况,着重分析了我国推行总分馆制的必要性、紧迫性和推行总分馆制应当注意的几点事项;同时,指出了"总分馆制"是一个适合图书馆发展和方向的主流体制模式.     

装饰木材美感度的评判

以65种具代表性的装饰木材为评价对象,采用大众评判法获得公众对每种装饰木材的喜好度值,用多元数量化理论Ⅰ模型建立喜好度与14个装饰木材表面要素间的回归关系,并用影响装饰木材美感度的颜色、色差、表面硬度、表面粗糙度4个主要因子建立了装饰木材美感度模型.结果表明,装饰木材的美感度随着表面硬度的增大而增大,随着表面粗糙度和色差的增大而减小,深暗色装饰木材具有较高的美感度.     

4种常用装饰装修木材表面特性分析

对筒状非洲楝、水曲柳、古夷苏木和杉木4种常用装饰装修木材表面特性进行测定分析,结果表明:在CIE(1976)L*a*b*色空间中,筒状非洲楝和古夷苏木明度L*平均值较低,属于深材色树种;杉木明度L*平均值为70.28,属于较高明度。从整体分布情况来看,4种常用装饰装修木材的a*和b*都分布在0以上,明度分布在40以上,色调标号都分布在YR的区间;古夷苏木和水曲柳木材表面润湿性大于筒状非洲楝和杉木。     

基于B/S架构的新疆组织机构代码业务受理系统的设计与应用

随着电子政务的普及,新疆组织机构代码网上业务受理系统的实现,提高了新疆代码工作管理能力和服务效率。本研究在基于B/S架构下的业务受理系统的基础上,介绍了该系统的设计与应用后的社会效益。