叶的

The leaf production continues, but as a result of leaf abscission, the older, lower leaves will drop off, as the plant grows taller.

叶生产继续，但是由于叶裁去，更旧，较低的叶子将减低，当植物变得更高。

And use the prior and more consummate ways to carry through vaneaccidence design, These ways have own technology points and disadvantage, In this paperstressly discuss the momentum-element theory way, this way was developed in the basic ofthe two ahead ways, and it overcome their defect. It also use element theory to deal withvane design. In the vane designing and aerodynamical characteristic calculating they bothrelate with intervene gene, so the keystone is to carry through the intervene gene in twocase, thereout to do the vane design and aerodynamical characteristic calculating.

运用翼型的基本概念和风力机叶片的基础外型参数进行叶片设计的预研讨论，并分别运用了Glauert和Schmitz叶片设计方法叶片进行初步设计，这两种方法有其各自技术特点和缺点，文中还着重研究了动量—叶素理论方法，这种方法在前两种设计方法的基础上发展而成，并采用两者的叶素研究方法进行叶片设计，动量叶素理论方法在进行叶片外型设计和叶片气动特性计算都涉及到干涉因子，文中重点对设计和计算情况下的干涉因子进行处理，并由此来设计叶片的外型和进行气动特性的计算。

Our group is interested in plant secondary metabolism and cotton biology. Current research projects include characterization of transcription factors and small RNAs involved in controlling cotton fiber and Arabidopsis development; investigation of terpenoid biosynthesis, particularly in Artemisia annua; and genetic engineering of cotton fiber development, plant resistance to insects, and artemisinin production.

利用遗传学、发育生物学、生物化学和分子生物学等手段克隆和鉴定参与叶形态建成的重要基因，解析它们之间的互作关系，了解叶形态建成的基因调控网络，认识叶形态建成的分子调控机理，为创制具有理想叶片形态的作物遗传改良品种提供理论基础和技术支撑。

In order to find the reasons for susceptible collapse of wood cell in structure, the ultra –structure of wood were observed and analysis the effect of ultra-structure on paths of free water moving with E.urophylla and E. grandix×urophylla as materials. Based on the research on structure, the reasons of susceptible collapse of wood were discussed.

摘 要：本文以尾叶桉（E.urophylla）和尾巨桉（E.grandix×urophylla）为研究试材，用扫描电子显微镜观测了这两种木材的超微构造，分析了构造对自由水移动途径的影响，探讨了尾叶桉、尾巨桉木材容易发生皱缩在构造上的原因，根据皱缩发生的机理确定了尾叶桉、尾巨桉木材发生皱缩的基本条件。

The recovery of the leaf area of winter wheat after the relief of stress is closely linkedwith its tillering properties,Which results from the increasing number of new tillers and theirleaf area.

5水分胁迫后复水冬小麦叶面积的恢复与它的分蘖特性密切相关。胁迫解除后叶面积的恢复，是通过增加新的分蘖及其叶面积的途径实现的。

There are more catechins contanted in old leaf than in the tender leaf that was used for manufacturing tea. In this study, we propose a process to extract the catechins from the waste old tea leaf, eliminate the caffeine from the extract and assess the functional effects of the product.

然而制茶中所采用的嫩叶内儿茶素的含量反而较茶农修剪茶树所遗弃的老叶内之儿茶素含量为低，故本研究的目的在於利用茶农修剪茶树后废弃的老叶做为原料，而於从老叶提取儿茶素的过程中去除咖啡因，并对其进行抗氧化以及抑制人类癌症细胞株生长等功能性评估。

Under the condition [0mmol/L,raise in vermiculite] of phosphorus stress, variation in root morphology and biomass among different soybean genotypes at seedling stage were studied, the result shows: At two-leaf age, higher P-efficiency genotypes(K1 and K2) don't develop their potential advantages; at four-leaf age, some characteristics of K1 and K2, such as lateral root number, lateral root length, root absorbent area and dry weight of shoot are all less reduced than those of intermediate P-efficiency genotypes(Z1 and Z2) and of lower P-efficiency genotypes(M1 and M2), and dry weight of root and R/S of higher P-efficiency genotypes are more increased than those of the others.

在磷胁迫[0mmol/L，砂培]条件下，对不同基因型大豆苗期在根系形态、生物量等方面的差异进行了研究，结果表明：磷高效基因型在两叶期并未发挥出其基因型潜力的优势；四叶期，磷高效基因型的侧根数、侧根长、根系吸收面积、茎叶干重等性状的受抑制程度均显著低于磷中、低效基因型，而地下干重、根冠比却受到了较中、低效基因型更强的诱导作用。

Considering many biophysics processes such as the atmosphere,hydrology,plant leaf N content et al.a multiple layer,two-leaf canopy model for predicting of mass transportation and energy exchange between plant canopies and the atmosphere has developed after dividing the canopy height into three layers,and the sunlit and shaded leaf area index was computed respectively at different layers through introducing a foliage clumping index,it is important to distinguish the spatial light distribution and so leaf photsynthesis.

多层—双叶模型对冠层上方碳通量的模拟：综合考虑农田水、热因子及叶片氮含量的非线性垂直分布对碳、水循环的影响，将农田按植株高度分为上、中、下三层，并通过叶片集聚指数计算阴、阳叶面积以区分叶片的空间分布受光状态，建立了均匀农田与大气间物质输送和能量交换的多层—双叶模型，对农田冠层上方基于光合—呼吸的碳循环过程进行了模拟应用研究。

Determination of photosynthetic pigments used 80% of acetone extraction method directly and the photosynthetic characteristics of using Li-6400 portable photosynthesis detector. Results showed that Returning the right amount maize straw stem into field was able to significantly restraint this year winter wheat flag leaf Chla degradation, to raise the flag leaf Chla/Chlb in the watery metaphase and late stage, to effectively restraint the photosynthesis rate decrease in the watery stage, to increase the pertinence of photosynthesis rate and pigment compared to others. However returning more maize straw stem into field was able to accelerate the retrogradation of chlorophyll and photosynthesis rate decrease then the yield declined.

结果表明：适量的玉米秸秆还田(9 000 kg/hm^2)可显著抑制接茬冬小麦灌浆中后期旗叶Chla降解，提高小麦灌浆中后期旗叶Chla/Chlb的比值，有效抑制灌浆期旗叶光合速率的下降，与其他处理相比，其光合速率与叶绿素的相关性得到加强；过量的秸秆还田(15 000 kg/hm^2)，加速了光合色素的降解，使得光合速率下降，产量降低；在各处理中，处理Ⅱ(9 000 kg/hm^2)产量最高。

The results show that various blade stacking lines have a great effect on location, strength and scale of passage vortex at cascade exit, moderate positive curved blade and positive leaned blade can decrease energy loss of guide vane cascade.

计算结果表明：导向器叶栅采用不同积叠线形式的叶片，对导向器叶栅出口截面上通道涡的位置、强度和尺度以及能量损失的影响是显著的，采用适度的正弯或正倾斜叶片可降低导向器叶栅的能量损失。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。