查询词典 LD

The acute toxicity test indicated that OHSP of LD was big than 15000 mg/kg, it was showed that OHSP was safety and avirulent substance.

急性毒性试验中的LD50大于15000mg/kg，说明动物长期服用口腔保健精是安全无毒的。

The principle of frequency bathochromic shift used for testing the thermal resistors R(subscript th of Laser Diodes was given. The temperature change △T was obtained indirectly because the temperature change caused the LDs peak wavelength change△λ.

给出了&频率红移法&测量半导体激光二极管热阻R的原理：由于温度变化引起LD峰值波长的变化△λ，间接得到温度变化△T；由注入电功率和输出光功率间接得到热耗散功率。

The study, which verified the discrepency of metacognition in reading between the children of LD and the excellent comprehender, can efficiently guide the teaching of reading and improve their reading faculty .

研究学习困难学生的阅读元认知，探明学习困难学生与优生在阅读活动中的元认知差异，不仅可以进一步丰富和发展元认知理论，而且还可以有效地指导阅读教学，提高学习困难学生的阅读水平。

In the case of 10% reflectivity, less than 3.7ns with 8.6:1 pulse-compression ratio has been observed. As our acknowledgement, that is the first reported.In addition, a new type of phase conjugator using tapered fiber is designed, which combined the higher reflectivity of small core-diameter fiber and higher damage threshold of large core-diameter fiber.

为了获得更高的能量反射率和稳定性，我们自行设计了一种新型的锥度光纤，并应用于LD泵浦的双通放大DPL系统中；实验表明：应用锥度光纤相位共轭器可以获得高达85％的能量反射率和90％的相对稳定度。

The right parietal cortex contusion was made with stab wound and the rat was killed at various survival time( 30min, Ih, 3h, 6h, 12h,ld, 3d, 7d, 14d, 21d). Paraffin sections(4 μ m) were cut coronally of the whole brain and stained with antibody of GFAP, the hemotoxylin eosin stain was done in the mean time.

实验组用针刺法造成大鼠右顶叶脑挫伤后，按30min，1h，3h，6h，12h，1d，3d，7d，14d，21d不同时间分批处死动物并立即取出全脑，同时颈静脉取血2ml，正常对照组不造成颅脑损伤，直接处死动物后立即取材。

The study should be useful for design and analysis of the diffractive optics for LD laser beam shaping.

这对设计和分析半导体激光器衍射整形光学器件具有重要意义。

Fant by use of serial CK-BB isoenzyme measurement.

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Mineral phase of LD slag was studied when smelting SPHC and Q235 by high phosphorus hot metal,the results show that mineral phase of slag consist of C2S mainly,P2O5 exist in C2S phase,After de-oxygen,mineral phase of slag consist of akermanite and gehlenite mainly.

主要研究了高磷铁水转炉冶炼SPHC和Q235低合金钢后转炉渣矿相组织，实验结果表明，高磷铁水转炉渣的矿相组织主要以硅酸二钙(C2S)为主，P2O5主要存在于该相中。

The injectable hemocoelic potency LD (50 of toxin Ⅲ was 0.18 μg/larva against Galleria mellonella fifth_instar larvae.

SDS-PAGE图谱显示毒素Ⅰ和毒素Ⅱ是由多个多肽组成的复合蛋白，而毒素Ⅲ只分离出一条多肽。

Object To analyze the rDNA ITS sequences between wi ld plants and cultivars of Trapa L. and study the utility in p hylogenesis and identification of these two groups.

目的 对野生菱和栽培菱种rDNA ITS片段进行分析，探讨该片段在两大群体中的系统学及鉴别研究意义。

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。