一种新型控制技术-PCC在水电站中的应用

本文吸收先进的监控设计思想．在总结和分析原有的现地控制单元的设计原理的基础上．将工业控制领域里一项先进的技术和产品——PCC引进到水电站的控制当中．使水电站监控系统无论是在技术上还是结构上都有了一个新的突破。该系统功能层次清晰、实时性、可靠性更高．具有较高的应用推广价值。     

Contributions of DPOR at Low Light Intensi.ty to Chlorophyll Biosynthesis and Growth in the Synechocystis sp. PCC 6803

Introduction Chlorophylls (Chls) and bacteriochlorophylls (Bchls) are two of the most abundant classes of natural pigments, and their biosynthesis is a major metabolic activity in the ecosystem[1]. Protochlorophyllide (Pchlide) is an intermediate in the Chl and Bchl biosynthetic pathway of photosynthetic organisms and its reduction to chlorophyllide (Chlide) is a key regulatory step in the Chl biosynthesis pathway. In this reaction, the porphyrin D-ring of Pchlide is converted to chlorin b…     

铁限制诱导对聚球藻转录组的影响

为探究Fe元素限制对聚球藻转录组的影响,该文以聚球藻Synechococcus sp.PCC 7002为研究对象,采用高通量测序技术对经过铁限制处理的聚球藻Synechococcus sp.PCC 7002进行转录组分析.以铁的3种摩尔浓度进行处理,其中每组数据重复3次实验,一共获得9组实验数据;对照组摩尔浓度为10....     

基于保护邻居基站主载波的载波（重）选算法

毫微基站(Femtocell)的引入,给无线网络的干扰管理带来新的挑战。在动态部署Femtocell的网络中,每个进入网络的基站选一个载波作为主载波,主载波提供小区的全局覆盖和初始化接入服务。主载波选择的好坏,直接影响小区边缘用户的通信质量。本文提出基于保护邻居基站主载波的家庭基站载波重选算法,基站借助用户测量汇报得到背景干扰信息,重选主载波;本算法着重考虑对邻居基站边缘用户影响,降低小区边缘干扰。仿真结果表明,该算法可以提高系统平均吞吐量和边缘用户的频谱效率。     

转小鼠金属硫蛋白基因集胞藻6803及其野生藻培养

通过摇瓶培养考察转小鼠金属硫蛋白基因集胞藻６８０３及其野生藻的光合自养培养过程中碳源浓度、氮源浓度和光照度对这两种藻生长的影响。野生藻的最适生长碳源浓度（０．０５－０．５ｇ／Ｌ）比转基因藻的最适生长碳源浓度（０．０２－０．０５ｇ／Ｌ）高。氮源浓度对转基因藻和野生藻的影响趋势相同。在０．３－４．５ｇ／Ｌ范围内,随着氮源浓度的增高,藻体生长的最大细胞浓度降低。转基因藻生长的最佳光照度为１５００ｌｘ,野     

关于汽车运输船舱内裂纹损伤

针对汽车运输船（ＰＣＣ）船侧非贯通横舱壁周围裂纹损伤这一突出问题，通过有限元数值方法对一具有代表性的实船损伤实例进行了分析；并在此基础上，重点对其加强方案进行了多种探讨比较以及相应的累积疲劳损伤估算，提出了一个较佳加强方法，为从工程的角度解决ＰＣＣ舱内裂纹损伤，提供了可供参考的结果．     

工业自动化控制产品的新锐——PCC

通过PCC产品与各种工业自动化控制产品的比较，介绍了PCC的特点及其代表的工业自动化控制产品的发展方向。     

鱼腥藻PCC7120α质粒上的parD/E同源基因all7155/asl7156的克隆及表达

为研究鱼腥藻PCC7120质粒上毒素抗毒素系统的蛋白质性质和相互作用,根据NCBI中PCC7120的α质粒上的all7155和asl7156基因数据,通过降落PCR克隆了目的基因(all7155/336 bp,asl7156/258 bp).将目的基因片段连接至p MD18-T构建了克隆载体,蓝白斑筛选了阳性克隆,经双酶切纯化后将目的基因连接至表达载体p ET30a(+),并转入表达菌BL21中,测序后证实构建成功,并利用IPTG诱导进行了表达.通过NCBI的BLAST蛋白比对,发现了all7155和asl7156与已知的Par D/E毒素抗毒素系统同源,可通过对此基因的克隆,表达和蛋白性质来进一步认识Par D/E系统.     

DnaJ-like protein gene sll1384 is involved in phototaxis in Synechocystis sp. PCC 6803

In Synechocystis sp. PCC 6803, gene sll1384 encodes a protein with a DnaJ domain at its N-terminal portion and a TPR domain at the C-terminal portion. An sll1384 mutant shows no difference from the wild type in adaptation to different temperatures, but almost completely loses its capability of phototactic movement. After complementation with sll1384, the mutant regains the phototaxis. As shown with electron microscopy, on the cell surface, mutant cells have pill that appear to be the same as that of the wild type. Also, the transformation efficiency remains unchanged in the mutant. It is postulated that Sll1384 regulates phototaxis of Synechocystis through protein-protein interaction. It is the first DnaJ-like protein gene identified in a cyanobacterium for a role in phototaxis.     

Promoter activities of genes cpcT2 and cpcS2 in Nostoc PCC 7120

To study the promoter activities of genes cpcT 2 and cpcS 2,several upstream DNA fragments of these two genes with different lengths were selected.These fragments were fused with promoterless gfp(reporter gene) for constructing five recombinant plasmids.Then,these recombinant plasmids were transferred into Nostoc PCC 7120 by conjugation.The promoter activities of genes cpcT 2 and cpcS 2 were determined by observing the fluorescence of green fluorescent protein(GFP) with a fluorescence microscope.The result showed that the 1 300 bp(-1 300 to 0 bp) and 2 600 bp(-2 600 to 0 bp) upstream fragments of cpcT 2 had strong promoter activity and the promoter activity of the 680 bp(-680 to 0 bp) fragment was weaker than that of two above fragments of cpcT 2.The 2 000 bp(-2 000 to 0 bp) upstream fragment of cpcS 2 revealed weak promoter activity.This showed that a strong promoter of cpcT 2 was located in the upstream fragment between-680 and-1 300 bp.