叶绿素的

Using fresh chlorophyll distilled from fresh leaves of yulan as experimental material, this research analyses the change of the absorption spectra of chlorophyl under light of different wave length, different illuminating time, different temperature by means of using the WGS-9 chroma analysing instrument.

以从新鲜玉兰叶片中提取出的新鲜叶绿素为原料，用WGS-9型色度仪分别测出叶绿素提取液在不同波长的光和不同照射时间以及不同温度下的吸收光谱，通过对吸收光谱的分析得出不同光照和温度对叶绿素的影响及对叶绿素中成分的破坏情况。

The extraction and the stability of chlorophyll of leaves of Indocalamus latifolius and the preparation of sodium-zinc chlorophyllin were studied using orthogonal experimental designs.

通过正交实验对箬竹叶中叶绿素的提取工艺、叶绿素的稳定性以及叶绿素锌钠的制备工艺进行了研究。

However, the ratios of chl a/ch b and carotenoids/chls were dropped due to drought, independently of sampling unit.

然而，不管是用单位叶面积的色素含量或是单位叶鲜重的色素含量计算而来的叶绿素a和叶绿素b的比率以及类胡萝卜素和总叶绿素的比率对土壤干旱引起的变化趋势是一致的，都表现为降低。

Tracing the hydrolysate of spinach endogenous chlorophyllase by HPLC, it was found that the effect of rare earth on the chlorophyllase activity or the hydrolysis activity of chlorophyllase on La-pheophytin was not remarkable; but La-pheophytin could accelerate the oxidation degradation of chlorophyll in spinach.

此外，用HPLC跟踪菠菜中叶绿素酶水解活性的结果显示：稀土离子对叶绿素酶的水解活性的影响并不显著；同样叶绿素酶对镧叶绿素的酶水解活性也不明显，然而，镧叶绿素可以催化叶绿素氧化降解。

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%。

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 multivariate linear regression analysis on specific absorption coefficients for pheophytin and chlorophyll a indicates that the specific absorption coefficients for pheophytin was much larger than chlorophyll a at 412 nm; slightly larger than pheophytin at 440nm; and about 3 times larger than pheophytin at 670 nm and 675 nm.

结果表明，412nm波段脱镁叶绿素的比吸收系数远大于叶绿素a；440nm波段，叶绿素a的比吸收系数略大于脱镁叶绿素；670、675nm波段，叶绿素a的比吸收系数约为脱镁叶绿素的3倍。

The absorption bands observed for Pb-pheophytin a at 462nm and 673nm , while for Pb-pheophytin b at 480nm and 662nm . Compared with pheophytin a and pheophytin b, all these bands red shifted more or less. Among the reported metallochlorophylls, the degree of red shift of Pb-pheophytin in Soret band was the largest by 54nm and 44nm for Pb-pheophytin a and Pb-pheophytin b, respectively.

实验表明：对铅叶绿素a和b系列来说，它们在Soret带、Q带的特征吸收峰分别在462nm，673nm和480nm，662nm；与脱镁叶绿素a，b相比，铅叶绿素a，b在Soret带和Q带吸收峰均有不同程度的红移；与现已报道的金属叶绿素相比，铅叶绿素a，b在Soret带的红移程度最大，分别为54和44nm；铅叶绿素不具有荧光活性，并能猝灭脱镁叶绿素的荧光。

At the same leaf position,the SPAD value was high under mild temperature and light.

艾天成等[2-3]在测定了水稻、棉花、大豆等夏作物的叶绿素含量及SPAD值后，确定了SPAD值与叶绿素含量的相关函数，发现二者相关性达到了极显著水平，表明可以用SPAD值来代表叶绿素的含量。

L under high temperature sterilization. The condition of complexion of Zn2+ with chlorophyll to stabilize the chlorophyll to prevent the browning of chlorophyll in green Typha latifolia.L is studied.

并对利用锌离子与叶绿素高温复合反应稳定叶绿素以防止绿化蒲菜中叶绿素的褐变的工艺条件作了初步探讨。

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。