光抑制

Five minutes is the optimal irradiation time for ALA-PDT by Xe lamp under the same irradiation conditions. Irradiation injury caused by the light alone was slight, but the destruction rate of ALA-PDT was very high. Conclusion: Xe lamp's action spectrum is wider and it's power is higher, so it's better than 532 nm laser for ALA-PDT.

结果：532 nm连续激光和脉冲激光对K562细胞的ALA-PDT抑制率均较低，增加光剂量也不能有效提高ALA-PDT的抑制率；氙灯在功率密度为350 mW/平方公分、光照5 min时就能达到最佳的光剂量，此时单纯光照对K562细胞的光损伤作用很小且ALA-PDT效率很高。

Cells grown at different CO2 levels showed differed characteristics of photoinhibition when exposed to high irradiance.

不同CO_2浓度下培养的藻细胞，在强光（1000～2000μmol m~(-2) s~(-1)）下表现出不同的光抑制特性。

High temperature stress ; Oryza sativa ; photoinhibition ; active oxygen ; chlorophyll fluorescence parameter ; protection

高温胁迫；水稻；光抑制；活性氧；叶绿素荧光参数；保护

There is slightly variation in Pn among the Pistacia vear varieties, but the curve of diurnal variation of Pistachio leaf photosynthesis all showed two peaks. This fact indicated that there exists photoinhibition of photosynthesis in pistachio leaves under strong sunlight at noon.

阿月浑子光合特性因种源和品种不同而略有不同，但光合速率的日变化均呈双峰曲线变化模式，中午强光下发生了&光抑制&。

The study on the photoinhibiton of Pistachio shows: the exposure of Pistacia vera seedlings to high irradiance induced lowering of apparent quantum yield , maximal fluorescence , minimal fluorescence , variable fluorescence , photochemical efficiency of PS Ⅱ, and photochemical quenching , but raising the Non-photochemical quenching , this indicates that high irradiance reduces the quantities of oxidized Q〓, which depresses the ability of electron transport from Q〓 to Q〓, and lowers the electron transport rate and the photosynthesis rate.

对&光抑制&研究表明，强光照射后，叶片表观量子效率、最大荧光、初始荧光、可变荧光、光化学效率、和光化学猝灭系数下降，而qN升高，说明强光处理降低了Q〓的氧化态数量，使Q〓→Q〓传递电子的能力下降，进而导致了电子传递速率和光合速率的下降。

During ginger growth,the photoinhibition of photosynthesis and the diurnal variation of photosynthetic efficiency of ginger Zingiber officinale Rosc.

生姜生长期间，午间强光使叶片光合速率、表观量子效率及PSⅡ的光化学效率下降，即表现为光抑制。

In the dark, COP1 accumulates in the nucleus and represses photomorphogenic development, and the light diminishes the abundance of COP1 and abrogates its activity.

当植物在暗环境下生长时，COP1蛋白聚集在细胞核内，抑制光形态的建成，而在光环境下，COP1蛋白则分散到细胞质中，解除其抑制作用，恢复光形态建成。

We have proven that the accumulation of superoxide will be dangerous by disproportioning to other deleterious ROS such as H〓O〓 and ·OH, although superoxide is less harmful than singlet oxygen because of the capability of artificial quinone to partially prevent PS Ⅱ reaction center complexes from photodamage.

发现受到光抑制破坏的PS Ⅱ仍能生成O〓，尽管重组醌对PS Ⅱ反应中心复合物的保护作用表明O〓对PS Ⅱ的破坏性可能不如单线态氧强，但它可以通过诱发生成的其它活性氧物种，如H〓O〓和·OH等，导致对PS Ⅱ造成显著的破坏，因而过多的O〓生成对高等植物是有害的。

On the bases of absorption spectra measurements, it is shown that stabilizer is beneficial to the stability of J-aggregate of sensitizing dye Results of reflection spectra and spectral-exposure experiments demonstrate that spectra absorbance are greatly affected by the adding order of stabilizer and sensitizing dye and only stabilizer added after dye can advantage for J-aggregate of sensitizing dye neatly forming on the surface of silver chloride grain and its absorbance be available ESR experiments show that the addition of stabilizers can decrease the number of dye positive hole and accelerate the decay of it Then desensitization aroused by the recombination of dye positive hole with photoelectron and/or latent image center, was reduced at the presence of the stabilizers

通过溶液光谱实验说明稳定剂有利于染料J聚集体的稳定性；反射光谱实验和光谱曝光实验证明稳定剂与染料的添加次序对乳剂的光吸收有很大的影响，只有稳定剂在染料之后加才有利于染料在AgCl颗粒上排列整齐形成J聚集态及其光吸收；ESR实验结果说明稳定剂的加入可以降低染料正空穴的浓度及其衰减速率，使乳剂中染料正空穴减少，从而抑制了染料正空穴引起的减感作用。因此可以认为稳定剂的超增感作用：一是有利于染料形成J聚集态及乳剂的光吸收；二是降低染料正空穴的浓度，从而抑制染料的减感。同时还提出了染料与稳定剂的增感吸附模型。

The results indicate that: these red pigments are insoluble in organic solvents but free in water, the pigments are red-violet and stable under acidic condition while yellow and unstable under alkaline condition, and they absorb the highest value at wavelength near 538 nm, light suppresses their accumulation and enhances their decomposition.

结果表明：该红色素溶于水而不溶于有机溶剂，光抑制其积累，在酸性条件下稳定，为红色，在碱性条件下不稳定，为黄色，最大吸收峰为538 nm。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐