碱的

The preventive measures for the harmful defects of alkali metals are as follows: 1, reducing the alkali metals content in the raw materials; 2, increasing the MgO content of the sinter , decreasing the basicity of slag , decreasing the Si content of the pig iron, increasing relative slag volume; 3 , introducing prereduced ore pellets or partly reducted sinter; 4increasing the ability of coke resisting alkali metals; 5, using refractories that have the ability of resisting corrasion of alkali metals; 6 , cleaning the blast furnace periodically. The above recommendations are necessary for decreasing the circulation and accumulation of alkali metals effectively in blast furnace, reducing the harmful influence of alkali metals on blast furnace, increasing the smelting intensity, decreasing the coke rate, improving the gas permeability.

基于碱金属对高炉冶炼的上述危害，本文结合湘钢高炉的实际生产情况，通过理论分析、计算以及其他钢厂防治碱害的经验，提出防治高炉碱害的措施：1、减少入炉原、燃料的碱金属含量；2、提高烧结矿中的MgO含量、降低炉渣碱度、降低生铁含硅量、适当增加渣量；3、采用预还原的金属化球团或部分还原的烧结矿；4、提高焦炭的抗碱能力；5采用抗碱侵蚀的耐火材料；6、周期性性洗炉，以有效地减少碱金属在高炉内的循环富集，降低碱金属对高炉的危害，提高高炉的冶炼强度，降低焦比，改善高炉透气性。

We attached for the first time -NOBIN to Frechet-type dendron units. The syntheses of 16 kinds of dendrimer-based NOBIN Schiff-base ligands were achieved in a straightforward manner by simple condensation of -NOBIN with the corresponding salicylicaldehyde derivatives, of which 12 belong to the dendritic Schiff-base ligands and 4 belong to the non-dendritic Schiff-base ligands.

通过手性拆分获得了光学纯化合物NOBIN，首次将NOBIN手性单元连接到树枝状大分子中去，设计合成了四个系列16种新的NOBIN衍生的希夫碱三齿手性配体，其中4种为非树枝状手性希夫碱配体，12种为树枝状手性希夫碱配体。

Hydrastine(97.7%) was obtained with extracted rate 65%by extracting the Goldenseal with mixed Solvent;Berberine hydrochloride (99.9%) was obtained by adding hydrochloride acid to alcohol (alcohol∶H 2O=1∶1) solution of the extract and Hydrastine (99.5%) was gained by CLC method with the yield 1%.

原药材用混合溶剂直接提取分离，可得到含北美黄连碱 97.7%的结晶体，提取率达 6 5%；提取物经醇水溶解、酸化，可直接获得小檗碱盐酸盐结晶，纯度达到 99.9%；用柱色谱法，可得到 99.5%的北美黄连碱，收率约 1

Calculation results indicated that, same to the experimental results, the complex can intercalate into DNA sequence.

尽管同在错配碱基对附近，由两对错配碱基对组成的双碱基对Ⅱ上的插入并不占优势。

And aphid. Results of mixed medicamental test showed, Matrine (1.8%) and avermectin(0.04%) had the best effect on killing pesticide and protecting leaves to Pieris rapae L.;Matrine(0.5%) and avermectin(0.2%) and Matrine(0.5%) and avermectin(0.25%) had the best effect to aphid, their LC50 is 0.08815mg/ml 0.07454mg/ml.

药剂混配试验结果表明：对菜青虫的试验中，1.8%苦参碱+0.04%齐螨素处理杀虫效果、保叶效果最佳；对蚜虫的试验中，0.5%苦参碱+0.2%齐螨素混剂处理，0.5%苦参碱+0.25%齐螨素混剂处理效果最佳，两者致死中浓度分别为：0.08815mg/ml、0.07454mg/ml。

Two different lines of evidence support the view that a base pair is composed of one purine and one pyrimidine.

有两方面的证据支持在DNA分子的螺旋构型中，每一个碱基对中都含有一个嘌呤碱基和一个嘧啶碱基

One liquor system is alkaline and is fed into the counter current washing liquor of the unbleached part of the fiber line.

一个流体系统是碱，碱流入未漂白纤维线的逆流洗涤液。另一流体系统是酸，酸加入部分碱回收区域或加入另一个分立的清洗系统。

When the causticization time was longer than 120min and higher than 80℃ with 1.1:1 of stoichiometric ratio, and the precipitation was longer than 30min at 80℃ with n:n(Na2S) being 1.45:1, the NaOH concentration after reviving was denser than 8%, and the revived caustic approximately had the same physical property and adsorption of CO2 as the new caustic.

结果表明：苛化反应温度大于80℃，反应时间超过120 min，n：n(Na2CO3)为1.1：1， CuO沉淀反应温度为80℃，反应时间30 min，n：n(Na2S)为1.45：1等条件下，再生后的NaOH含量可在8%以上，并且再生碱液的物性以及再生碱液对CO2吸收速率上与新鲜碱基本相同。

In this study, human tongue cancer Tca8113 cells and human umbilical venular endothelial cell ECV304 are treated with CPT and the cell proliferation and apoptosis are detected in order to investigate the effect of CPT on Tca8113 and the mechanism of antiangiogenesis.

本研究以喜树碱作用于舌鳞癌细胞(Tca8113)及人脐静脉血管内皮细胞(ECV304)，检测细胞增殖及凋亡状况，以研究喜树碱对舌鳞癌细胞及血管内皮细胞的生长抑制和凋亡诱导作用，探讨喜树碱抗鳞癌的作用及可能机理，并初步探索其抗血管生成机制，为该药治疗皮肤肿瘤和银屑病奠定实验基础。

Results:(1) The rats produced amphetamine CPP after treated with 2 mgkg^(-1) amphetamine for 4 days. Ketamine and low, middle, high dose rhynchophylline all could eliminate the CPP effect, and the effect of rhychophylline was increased in a dose-dependent manner. Rhychophylline itself could not induce CPP in normal rats.(2) When compared with normal rats, the NR2B expression in nucleus accubens and amygdaloid of the model rats was obviously increased. Ketamine and middle, high dose rhynchophylline could decrease NR2B expression induced by amphetamine, while low dose rhynchophylline did not affect NR2B expression. Rhynchophylline had no effect on RN2B expression in normal rats.

结果：(1)建立了苯丙胺（2mgkg^(-1)，连续4d）诱导的位置偏爱模型，氯胺酮及钩藤碱低、中、高剂量均可消除苯丙胺诱导的位置偏爱效应，随钩藤碱剂量增加其效应加强，且本身无精神依赖性；(2)苯丙胺模型组大鼠伏核和杏仁核NR2B蛋白表达增加，氯胺酮及钩藤碱中、高剂量抑制NR2B表达，低剂量及本身对NR2B表达无影响。

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。