蓝藻

The development of cyanobacterial genetic engineering makes it an increasing necessary to develop high cell dens...

蓝藻基因工程的发展迫切要求用封闭式光反应器进行蓝藻的高密度培养。

The phytoplankton community was mainly composed of Cyanophyceae, Euglenophyceae, Bacillariophyceae, and Chlorophyceae, and the dominant species were Oscillatoria subtillissima, Dactylococcopsis irregularis, Euglena caudata, Melosira granulata, Cyclotella meneghiniana, Chlorella vulgaris, and Scenedesmus quadricauda. The main environmental factors affecting the distribution of phytoplankton species in July were ammonium-nitrogen, dissolved oxygen, water temperature, and total phosphorus, while those in September were pH, water temperature, dissolved oxygen, transparency, and total nitrogen. Water transparency and zooplankton were the main factors affecting the biomass of Cryptophyceae, Pyrrophyceae, and Bacillariophyceae; while nitrogen, phosphorous, and dissolved oxygen were the main factors affecting the biomass of Cyanophyceae, Euglenophyceae, and Chlorophyceae.

结果表明：调查期间共鉴定出浮游植物384种，隶属于8门，浮游植物密度范围为2.01×105～57.60×105 cells·L-1；群落组成以蓝藻、裸藻、硅藻和绿藻为主，主要优势种有细微颤藻、无常蓝纤维藻、尾裸藻、颗粒直链藻、梅尼小环藻、普通小球藻、四尾栅藻等；7月影响浮游植物分布的主要环境因子依次为铵态氮、溶解氧、水温和总磷，而9月的pH值、水温、溶解氧、透明度和总氮含量对浮游植物的分布产生影响较大；其中，透明度和浮游动物量是影响隐藻、甲藻和硅藻藻类生物量的主要环境因子，而蓝藻、裸藻、绿藻主要受水体氮磷营养盐浓度和溶解氧的影响。

PCC6803 to develop FRAP andFRET techniques in living cyanobacteria cells, which can be used to study thedynamics of photosynthetic membrane proteins.

PCC6803建立了在蓝藻活细胞内进行FRAP和FRET实验的技术平台，用以研究活细胞生理状态下蓝藻光合膜蛋白的动态变化。

Studies using FRAP in living cyanobacteria cells have shown thatphycobilisomes diffuse rapidly on thylakoid membranes, and this diffusion is requiredfor state transitions in cyanobacteria.

在蓝藻活体内利用FRAP技术的研究已经表明藻胆体可以在类囊体膜上快速的自由扩散，且该动态扩散对蓝藻的状态转换是必需的。

The above results are useful for the cultivation of transgenic cyanobacteria in enclosed photobioreactors, and would promote the application of mixotrophic cultivation system in microalgae cultivation. Besides, they are also useful to understand the interrelation between photoautotrophy and heterotrophy in cyanobacteria.

本文的研究结果在实践上可为转基因蓝藻的光生物反应器培养奠定理论和实验基础，同时可促进混合营养培养系统在微藻培养中的应用，在理论上有助于提高人们对于蓝藻光自养和异养代谢的相互作用和蓝藻光合作用及其调控的认识。

In March, May and July, Cyanophyta was the dominant one, with high proportions of 45.6%, 55.9% and 87.7%, respectively, whereas the proportions for Bacillariophyta decreased to 30.1%, 25.9%, and 1.1%, respectively. In November, proportions for Bacillariophyta and Chlorophyta were equivalent, 40% each, and the Cyanophyta composed below 20%. In December, Bacillariophyta made up 25.6% and Cyanophyta 38.2%. In March, May and July, dominant species of Cyanophyta were Microcystis aeruginosa, Pseudoanabaena, and Gloeothece linearis. In dry January, November and December, species of Bacillariophyta were dominated by A chnanthes sp., Melosira ambigua, Melosira granulata and Cyclotella meneghiniana.

全年中，蓝藻与硅藻比例变化较大，二者呈相反的变化趋势。1月份硅藻占较高比例（63.1％），蓝藻较低（〈20％）；3、5、7月份蓝藻比例较高（分别为45.6％、55.9％、87.7％），而硅藻较低（30.1％、25.9％、1.1％）；11月份硅藻与绿藻比例相当（各占40％），蓝藻低于20％；12月份硅藻与蓝藻比例分别为25.6％与38.2％。3月份和丰水期浮游植物优势种主要为铜绿微囊藻、假鱼腥藻和线形粘杆藻等蓝藻种类，枯水期的1月、11月和12月主要以曲壳藻类、模糊直链藻、颗粒直链藻和梅尼小环藻等硅藻种类为优势种。

Uni-algal cultures were made first on media enriched with nitrogenous compounds to encourage vigorous growth.The uni-algal cultures were then subcul- tured onto nitrogen-free media,which effected a preliminary separation of those algae which could thrive in the absence of pre-f...

在100毫升无菌无氮培养基中生长四天的结果测定，水生686固氮蓝藻、水生678固氮蓝藻(A.azotica forma a)、水生670固氮蓝藻和水生508固氮蓝藻的固氮量分别为1.0146、0.938、0.8614和0.759毫克。

Uni-algal cultures were made first on media enriched with nitrogenous compounds to encourage vigorous growth.The uni-algal cultures were then subcul- tured onto nitrogen-free media,which effected a preliminary separation of those algae which could thrive in the absence of pre-formed nitrog...

在100毫升无菌无氮培养基中生长四天的结果测定，水生686固氮蓝藻、水生678固氮蓝藻(A.azotica forma a)、水生670固氮蓝藻和水生508固氮蓝藻的固氮量分别为1.0146、0.938、0.8614和0.759毫克。

In accord with the promotion in the photosynthetic oxygen evolution and ATP content, the transient increase in chlorophyll fluorescence after the termination of actinic light was increased; and meanwhile, the half-time of re-reduction of P700〓 in the presence of DCMU after a pulse light under background far-red light was shortened by approximately 30%, indicating that cyclic electron flow around PS1 was accelerated by the treatment.

与此同时，我们还发现经NaHSO〓处理后，蓝藻细胞的作用光关闭后叶绿素荧光瞬时上升的幅度增加，同时在远红光背景下和DCMU存在时，饱和闪光后蓝藻细胞P700〓再还原的半时间缩短约30％，表明低浓度NaHSO〓溶液处理能够促进蓝藻细胞围绕PSI的循环电子传递。

The investigation deals,with the nitrogen fixation of some blue-green algae isolated from the soils of rice fields.Samples of algae-bearing soils were collected from rice fields in the provinces of Hupeh,Hunan and Kiangsi.

湖北、湖南和江西等地采集的稻田蓝藻经过分离、培养、缺氮培养初步找到可能固氮的蓝藻后，进一步得出了无菌的纯培养的蓝藻藻种，经过试验和用微量凯氏法测定其产生的氮量，确定了四种蓝藻系固氮蓝藻。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。