查询词典 root-mean-square

The chloroform phase was isolated into 7 phases by column chromatograpathy, and the bioassy showed that the 1 phase has strong inhibitory effect, was 91.01% on Abutilon theophrasti M., root length, 51.35%、63.93%on Echinochloa crusgalli L, seedling length and root length, and the Amaranthus retroflexux L.,germination rate is 0, the secondly was 2 phase and 5 phas, and next we continued iaolated these two phases.

用硅胶柱对氯仿组分进行分离得到7个组分，生物测定表明组分1化感作用最强，对苘麻根长抑制率为91.01%，对稗草芽长和根长的抑制率分别为51.35%、63.93%，反枝苋的发芽率为0；其次是组分2和组分5，由于组分2的含量相对较少，对组分1和组分5继续分离。

It,s allelchemicals were isolated through extraction, thin-layer chromatography, and column chromatograpathy. After the white clover was infused in ethanol and evaporation, the leavings was dissolved by water. The aqueous extract was extracted by petroleum,chloroform, ethyl acetate and n-Butanol successively, and the bioassay showed that the chloroform phase has obvious inhibitory effect, the inhibitory rate was 44.32%,88.08% on Abutilon theophrasti M., seedling length and root length, 82.08%,92.16% on Echinochloa crusgalli L., seedling length and root length, and the Amaranthus retroflexux L., germination rate is 0, the secondly was ethyl acetate phase.

运用萃取、薄层层析、柱层析等方法对白三叶草地上部分的化感物质进行初步分离，结果表明，白三叶草经乙醇浸提旋转蒸发后用蒸馏水溶解，依次用石油醚、氯仿、乙酸乙酯、正丁醇萃取，生物测定表明氯仿组分对杂草的抑制作用最强，对苘麻芽长和根长抑制率分别为44.32%、88.08%，对稗草芽长和根长的抑制率分别为82.08%、92.16%，反枝苋的发芽率为0；其次是乙酸乙酯相。

The study of adventitious root formation is for the understanding andcontrolling of root development and vegetative propagation.

有关不定根形成机理的研究，是了解和控制根的发育和营养繁殖的基础性工作。

Wetland plants have a series of physiological and anatomical characteristics to adapt flooding habitat, e.g., their root aerenchyma and oxygen-penetrating capability can make the rhizospheric micro-environment be under oxidation condition, resulting in the formation of Fe/Mn plaques on root surface.

湿地植物具有一系列生理和结构上适应浸水环境的特征，如根系的通气组织和渗氧能力，这使得植物根际微环境处于氧化状态，这样土壤中的铁和锰会在植物根表被氧化而形成红棕色的铁锰氧化物胶膜。

32P isotope tracing technique was used in this study,and the results indicated that phosphorus stored or pre-existed in roots would be remobilized in maize under phosphorus deficiency from root cortical cells with lysis to shoot mostly rather than root apex during aerenchyma formation.

Kraus等的试验表明玉米根系从土壤中吸收的32P可在根皮层内保留15 d，之后逐渐减少[2]。这意味着与叶片的情形相似，根内也进行着磷的活化和再运转。当植物处于磷胁迫下时，根系吸收的磷素远不能满足植物各器官生长发

The changes of total branch length, expending rate of root and ball root rate decline with the increase of N clement, which shows that after using N ,the root tuber of Juema lies not a commercial value.

蕨麻总分枝长、根系膨大率、球根率则随N素水平的增加而直线下降，表明施用N素后蕨麻块根不具有商品价值。

The root is not necessarily the bass, except when chords are in root position, to be indicated by the numbers 5 and 3, although such figuring is often omitted for chords in root position.

根音不是低音的必需，除非和弦在本位和弦，用数字3，5来表示，虽然在本位和弦中这样的数字标记经常被省略。

The administrator cannot enforce the position of the root bridge.The administrator can set the root bridge priority to 0 in an effort to secure the root bridge position. But there is no guarantee against a bridge with a priority of 0 and a lower MAC address.

管理员不可以通过设置交换机的优先级0来确保交换机的根交换机的地位，但是不能保证出现一个交换机的优先级为0却拥有更低 MAC 地址的机器。

There were significant difference responses in ROS metabolism, respiration and the viability of root tip cells between cucumber and figleaf gourd after exposure to the suboptimal root temperature conditions. Under suboptimal root temperature, plant growth was more inhibited in cucumber plant than figleaf gourd.

这些结果表明：不耐热的黑籽南瓜在夏季主要依靠热耗散这条途径来耗散过剩的光能，而耐热的丝瓜具有较高的光呼吸速率可能对其在高温高光强环境的生长比具有较低光呼吸速率的黄瓜与南瓜更有优势。

Unfortunately, accurately quantifying below-ground C fluxes and estimating fine root longevity are still elusive. One of reasons is because we do not know the proportions of shortlived vs. long-lived root pools or the distribution of fine root longevity within these pools.

但是，准确量化地下C通量以及估计细根寿命仍然是目前研究中的难点，其原因之一是因为我们无法确定不同寿命细根间的数量比例关系，抑或说不清楚细根寿命符合何种统计分布。

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。