叶绿素

With the light intensity decreased, the total chlorophyll , chla and chlb content of Celtis julianae 'Aurea' increased, especially chlb rising rapidly.

随着光强的降低，金叶珊瑚朴的总叶绿素、叶绿素a和叶绿素b含量都有所增加，且以chlb含量的增加更为显著。

The paper studied the physiological characteristics of the leaves of Cotinus coggygria Royal Purple with different colors in autumn. Three kinds of leaf colors were selected to measure the contents of chlorophyll, anthocyanin, phenylalanin ammo-nialyase activity and the water content in the leaves. The results showed that the leaves exhibited red if it had lower chlorophyll content, higher activities of PAL and higher content of anthocyanin. The green leaves had higher chlorophyll content, lower activity of PAL, less content of anthocyanin.

本研究以美国红栌秋季叶片为试材，选取红色，中间色、绿色三种颜色的叶片，测定其叶绿素、花色素苷、苯丙氨酸解氨酶活性及叶片组织中的含水量，讨论其对美国红栌秋季叶片着色的影响，结果表明：美国红栌秋季叶片中，红色叶片叶绿素含量较低，PAL酶活性较高，花青素苷的含量较高，所以叶色呈现红色；绿色叶片中叶绿素含量较高，PAL酶活性较低，花青素苷的含量较少，所以呈现绿色。

The total chlorophyll and chlorophyll a of Gleditsia japonica miq, Catalpa ovata G, Hippophae rhamnoides L decreased with pollution degree. So did the ratio of chlorophyll a and b.

山皂荚、梓树、沙棘叶片叶绿素总量、叶绿素a含量随着土壤被石油污染物污染浓度的增加而减少，叶绿素a/b比值下降。

The study with water culture showed that when treated with 0.056 mg Cu·L~(-1),the chlorophyll a,b and contents in Spirodela polyrrhiza and Lemna minor were increased by 11%,46% and 22%,and 8%,15% and 11%,while under 0.15～5.6 mg Cu·L~(-1),the contents were decreased by 63%,62% and 63%,and 46%,45% and 45%,respectively,compared with no copper added.

结果表明，低浓度Cu(0.056 mg.L-1)的处理下，紫背萍和青萍的叶绿素a、叶绿素b和叶绿素的含量均出现不同程度的增加，分别高出其对照11%、46%、22%和8%、15%、11%，而在高浓度Cu(0.18~5.60 mg.L-1)的处理下，上述色素含量均显著下降，平均下降幅度分别达63%、62%、65%和46%、44%、45%。

This and previous studies have shown that pheophytin absorption peaks appears at 412 nm in the violet region of spectrum, and 670 nm in the red.

由实测数据及相关文献推断出脱镁叶绿素蓝光和红光吸收峰分别位于412和670nm波段，并采用多元线性回归对脱镁叶绿素和叶绿素a的比吸收系数进行研究。

Compared with the related pheophytin, the maximum absorption bands of RE-pheophytin red shifted in Soret band and blue shifted in Q band.

结果显示：在酸性条件下所制备的稀土叶绿素实际上是叶绿素卟啉环被修饰的稀土叶绿素衍生物。

Additionally, Pb-pheophytin was non-fluorescent and could result in the fluorescence intensity quenching of pheophytin.

通过光度动力学测定，分别求得铅与脱镁叶绿素a、脱镁叶绿素b和13〓-羟基脱镁叶绿素a的反应速率常数为2.0、0.78和1.86mol〓 ls〓。

The spectrometric properties of the purified RE-pheophytins (RE＝La, Nd and Tb) was investigated. It was found that the RE-pheophytins prepared in acetic acid medium were in fact the modified pheophytin complexes with rare earths.

4利用硅胶薄层色谱对所制备的稀土叶绿素进行分离纯化；系统比较了不同稀土叶绿素之间以及它们与天然叶绿素的光谱性质和色谱保留行为的差别。

The reaction rate constants of Pb〓 with pheophytin a, pheophytin b and hydroxypheophytin a were 2. 0 mol〓 l s〓, 0.78mol〓 l s〓and 1. 86 mol〓 l s〓, respectively.

铅与叶绿素a直接进行反应的结果显示：铅并不能取代叶绿素中的镁生成铅叶绿素。

While the proportion of pheophytin in total pigment concentration increased, the absorption peak in the blue region of spectrum deviated from 440 nm to near 412 nm. The absorption peak height in the blue region was mainly influenced by pheophytin concentration, whereas the height in the red was decided more by chlorophyll a concentration.

随脱镁叶绿素占色素总浓度比例的增大，浮游植物吸收曲线上蓝光吸收峰偏离440nm波段，逐渐向412nm波段靠近，并得到蓝光波段吸收峰的高度由脱镁叶绿素浓度决定，而红光波段吸收峰的高度由叶绿素a浓度决定。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。