查询词典 phototactic

In this study, we measured the action spectrum of the phototactic response of F. taiwana in three time periods: in the morning, at noon and in the afternoon.

因此本研究分别於早晨、中午及下午等三个同时段，对台湾铗蠓成虫进趋光为之偏好光谱试验。

It is so concluded that both the perception to light and subsequently phototaxis behavior of C. pallens depend on the light intensity obviously, there is no visible photophobism response in any case, and the response of primal receptor cell potential is accordant with the phototactic behavior in a certain range of light intensity, indicating that light intensity plays a subtle role during the light perception and succeeding phototaxis.

这些结果表明：光强度是大草蛉感光性与趋光性行为的重要决定因素，强光时感光性电位反应与趋光性行为反应基本一致，弱光时则不同，暗示了光强度信息在感光性和趋光性间作用的有条件性和复杂性。

Chlamydomonas cells are also positively phototactic, swimming toward light to increase their photosynthesis rate.but if the light intensity becomes too great.they show negative phototaxis,swimming away to protect their pigments.

衣藻细胞也同样为正趋光，游向有光处以增加其光合作用速率，但是如果光强度过大，它们就会表现出负趋光，游走以保护它们的色素。

Thus, it is helpful to understand mutual reactions among pollutants in heavy metal polluted soil and eutrophic water, to clarify their biological and environmental effect through studying phototactic behavior of Daphnia influenced by nitrogen, phosphate and heavy metals.

因此，戮们筛选培育的隆线搔纯生物株是一种非常理想的生物监测器，优于国外培育使用的大型搔，可以根据隆线搔的趋光行为的变化来监测样品中的有害物质。②在水搔趋光指数测定过程中，测定装置的工作条件和参数显著影响结果。

It's negatively phototactic.

它是背光性的。

Drawn to light; exhibiting a positive phototactic or phototropic response.

正趋光性的，光正性的吸光的：显示出阳性趋光的或趋光性反应的

The tadpoles usually remain on or near rocks or sand and are positively phototactic.

蝌蚪是无尾两栖动物生命史中的一个重要时期，大约有四分之三

The behavioral responses of sea cucumber to different light intensity (100, 50, 10, 5, and 1 lx) and settlement substratum color (red, gray, yellow, blue, white, black, and green) were examined by mean phototactic rate and mean attractive rate methods. The results showed that the MPR was significantly different (P.05) among strong light regions (100, 50, and 10 lx)(P.05), but was not between weak ones (5 and 1 lx).

为了探讨刺参的趋光特性和附着基颜色对其行为反应的影响，分别用平均趋光率(mean phototactic rate， MPR)和平均聚集率(mean atteactive rate， MAR)统计分析了刺参在100、50、10、5和1 lx共5档强度的光照和7种颜色的附着基（红色、灰色、黄色、蓝色、白色、黑色和绿色）下的行为反应差异。

So, a lot of fundamental research work needed to be done, including screening Daphnia, as a biomonitor, that is sensitive to toxicant but less to environment changing so as to decrease the environmental interferences for obtaining more accurate determination results; exploring the relationship between the phototactic behavior of Daphnia and pollutants such as nitrogen, phosphate, heavy metal, hormone and pesticide, especially their mixtures; studying the effect of environmental conditions such as temperature, pH and fish kairomones on the phototactic behavior of Daphnia.

口。。。口国。国里华典翩胭角嗓国但由于缺乏有效的研究方法，致使有关研究难于开展，人们不得不忽略有害物质之间的互相作用，把有害物质共同存在情况视为单一存在。因此，研究氮、磷和重金属对水搔趋光行为的影响规律，有益于认识富营养化水体和重金属污染的土壤中污染物之间的相互作用，弄清这些污染元素共存时产生的生物和环境效应，这些研究是治理土壤和水体污染之前必须解决的重大科学问题。

So, a lot of fundamental research work needed to be done, including screening Daphnia, as a biomonitor, that is sensitive to toxicant but less to environment changing so as to decrease the environmental interferences for obtaining more accurate determination results; exploring the relationship between the phototactic behavior of Daphnia and pollutantssuch as nitrogen, phosphate, heavy metal, hormone and pesticide, especially their mixtures; studying the effect of environmental conditions such as temperature, pH and fish kairomones on the phototactic behavior of Daphnia.

口。。。口国。国里华典翩胭角嗓国但由于缺乏有效的研究方法，致使有关研究难于开展，人们不得不忽略有害物质之间的互相作用，把有害物质共同存在情况视为单一存在。因此，研究氮、磷和重金属对水搔趋光行为的影响规律，有益于认识富营养化水体和重金属污染的土壤中污染物之间的相互作用，弄清这些污染元素共存时产生的生物和环境效应，这些研究是治理土壤和水体污染之前必须解决的重大科学问题。

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。