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Two ligands L~Ⅵand L~Ⅶhave been designedand synthesized containing different terminal groups and using benzo-12-crown-4 as theskeleton, and their 18 rare earth nitrate and picrate complexes also have been synthesizedand characterized.

第二章：以五种不同种类水杨酰胺为功能末端基设计合成出以苯并-15-冠-5为骨架的配体L~Ⅰ～L~Ⅴ，并合成了其稀土硝酸盐和苦味酸盐的10个系列共51个稀土配合物。

Results: Among 32 tested MNs, depolarizing responses(excitatory postsynaptic potential, EPSP) were elicited by cVLF stimulation in 21 MNs, hyperpolarizing response (inhibitory postsynaptic potential, IPSP) in 1 MN, and IPSP preceded by EPSP in 4 MNs. The cVLFEPSPs were stimulus intensity-dependent, and could be abolished by low Ca(superscript 2+)/high Mg(superscript 2+) solution. compared with iVLF-EPSPs, cVLF-EPSPs showed longer latency (P.001). The cVLF-IPSP presented with membrane potential-dependent property and was eliminated by the perfusion of picrotoxin (30 μmol/L) and strychnine (1.0 μmol/L).

结果：在32个测试的MNs，观察到cVLF电刺激可在21个MNs上诱发去极化反应（即cVLF性兴奋性突触后电位，cVLF-EPSP），在1个MN上诱发超极化反应（即cVLF性抑制性突触后电位，cVLF-IPSP），在4个MNs上诱发cVLF-EPSP后复合有cVLF-IPSP的反应。cVLF-EPSP具有刺激强度依赖性、被低钙高镁溶液取消的特性，与i VLF性EPSP相比，有潜伏期较长的特点(P.001)。cVLF-IPSP呈膜电位依赖性，并被印防己毒素(30μmol/L)及士的宁(1.0μmol/L)取消。

Results By using containing ethanol-2mol·L -1 lithium chloride-water(2∶1∶5)solution,there is a very good secondary derivative differential pulse polarogram peak at -1.703 V.

结果 ：秦皮甲素在乙醇- 2mol·L- 1 氯化锂-水(2∶1∶5 )的底液中，于- 1.70 3V处出现一良好的二阶导数差示脉冲极谱法峰，其峰幅值与秦皮甲素在 0 。2～ 1.6mmol·L- 1 范围内呈良好的线性关系(r =0 。9998)，检测限为 5 0nmol·L- 1 。

Methods Iodine in sea water was determined by F-78 pulse polarograph under conditions of 0.5 mol/L KCl, 2.4×10-4 mol/L EDTA, pH=9.5 and removing O2 by inflation of pure N2 for 20 minutes. Results Recovery rate of sample was 97.7%～105%.

方法采用F-78型脉冲极谱仪于底液KCl浓度为0.5 mol/L ，EDTA为2.4×10-4mol/L，pH为9.5，通纯氮气除氧20 min条件下测定海水的含碘量。

When the sulfur concentration is in the range of 0～4 mg/L, the elemental sulfur has a linear relation with the peak current of polarography.

该方法灵敏度高，当元素硫浓度为0.1 mg/L 时仍可以看到明显峰电流；精密度和准确度较好，对1 mg/L 元素硫的测定，标准偏差为0.02；元素硫浓度在0～4 mg/L 浓度范围与极谱峰电流呈线性关系。

The results indicated that 3 chemicals could greatly enhance resistance of potato tuber to early blight at low concentrations.Protection rates induced by phenol(1 mmol/L),benzoic acid(0.01 mmol/L),and paraaminobenzoic acid(5 mmol/L) were 43.21%,40.72%,and 28.75%,respectively.

结果表明，供试的3种化合物均在较低浓度下具有较强的诱导抗病作用，苯酚、苯甲酸和对氨基苯甲酸分别在1，0.01和5 mmol/L时诱导的保护率最高，分别达到43.21%，40.72%和28.75%，均与对照差异极显著。

The test of dissociative water prolapsus implement in Gusilian showed that the oil content in transported water was above 2000mg/L before adding nano-composite demulsifier, when the dosage of nano-composite demulsifier was 300mg/L and treating time was 20min, the oil content in water flow from prolapsus implement was 130mg/L.

在东一联使用时，在井排来液条件相同的情况下和在外输水含油量相同时，纳米破乳剂的使用量仅为原有机高分子破乳剂的30%左右，减少破乳剂用量近70%；在孤四联游离水预分水器的试验中，未加纳米预脱水剂前，出水含油在2000mg/L以上。

Specifically, the specific on-resistance is conducted based on the proper value pair of L and L.

然后由最佳L和L值给出相应的特征导通电阻R。

The results were as follows: the activity of prawns was highest under the condition of pH 7.0, 35 ℃ using pyrocatechol as substrate; four inhibitors i.e ascorbic acid1 mg·mL~(-1, sodium sulphite2 mg·mL~(-1, phytic acid1 mL·L~(-1 and EDTA0.1 mg·mL~(-1 had some inhibiting effects on the PPO of prawns, in which the effect of phytic acid1 mL·L~(-1 was the best; the PPO activity of prawns increased gradurally during the storage period; the PPO activity of prawns was inhibited in vacuum environment, the lower the storing temperature was, the stronger the PPO activity was.

结果表明：以邻苯二酚为底物，虾PPO活性的最适pH为7。 0，最适温度为35 ℃；4种抑制剂(1 mg·mL-1抗坏血酸、2 mg·mL-1亚硫酸钠、1 mL·L-1植酸及0。 1 mg·mL-1EDTA)对南美白对虾PPO都表现出一定的抑制作用，以1 mL·L-1植酸抑制作用最强；南美白对虾在贮藏过程中PPO活性逐渐上升，真空环境中PPO活性受到抑制，贮藏温度越低，抑制作用越强。

4 G/L was found to be an optimal initial glucose concentration, where the concentration of pyruvic acid reached 58.0 g/L at 58 h with the yield of

实验确定 1 1 6.4g/L左右是较为适宜的初始葡萄糖质量浓度，发酵 58h时丙酮酸质量浓度和产率分别为 58.0 g/L和

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。