查询词典 pyridine

Place 100 mL of pyridine in a 250-mL graduated cylinder, and, keeping the pyridine cold in an ice bath, pass in dry sulfur dioxide until the volume reaches 200 mL.

将100ml的吡啶至250ml的量筒中，使吡啶在冰浴中保持冷，加干燥的二氧化硫直至体积达到200ml。

It was known that pyridine and Triton-x100 had a bad effect on the cell growth and lycopene production were studied. The results indicated that pyridine and triton-x100 inhibited cell growth and lycopene synthesis;β-ionone increased cell growth and lycopene synthesis when the concentration was 0.05 ml/L, but when the concentration became higher, there would be a decrease on the lycopene output; span-20 increased cell growth and lycopene synthesis effectively when the concentration reached 2.0ml/L, and the lycopene yield became 2.4×10~(-2) mg/L which was 3-fold than control.

研究了培养基中加入不同浓度的小分子效应物吡啶、Triton-x100、Span-20、β-紫罗酮、异烟肼对番茄红素产量的提高作用，结果显示培养基中加入很低浓度的吡啶(0.1ml／L)就会对菌体产生很强的毒害作用；triton-x100对类胡萝卜素的合成也有很强的抑制作用，试验的浓度为0.2ml／L到5ml／L，结果发现它对菌体的生长和番茄红素的合成都有抑制作用；β-紫罗酮在浓度为0.05ml／L时有很小的促进作用，而浓度升高就有了比较强的抑制效果；span-20在液体培养基中的加量为2.0ml／L时，对番茄红素的合成有很强的促进效果，产量达到了2.4×10~(-2)mg／L，比原始菌株产量提高了2倍，而浓度进一步增大就产生了很强的抑制效果。

The inhibiting efficiency of bromo-hexadecyl pyridine and 3-methyl pyridine is higher than that of the others.

其中溴化十六烷基吡啶和3-甲基吡啶的缓蚀性能较好。

These Ir complexes, bearing the chromophore ligand pyridine, isoquinoline and quinazoline respectively, exhibit green-to-red photoluminescence with moderate to high quantum efficiencies in the degassed fluid state and bright emission in solid state.

首先，描述一系列含P^O辅助基的铱金属错合物发光材料之设计概念，这些铱金属错合物藉由pyridine， isoquinoline和quinazoline不同的发光基团调控，磷光放光可以由绿色改变至红色，不论在除氧的溶液态以及固态都有相当不错的量子效率，并且具有效率高、寿命长的优点。

In Chapter 5,the pyrolysis of substituted six-membered ring model compound 4-methyl pyridine has been investigated.Instead of detail theoretical analysis of the reaction mechanism,the general results have been proposed from the products distribution and the combination of the pyrolysis investigation of its analogous pyridine.The major products are H_2,C_2H_2,C_4H_2,C_3H_3N and HCN,here HCN is not a primary initial product at low extent of decomposition.The mole fraction profiles of products have been obtained from the near threshold ionization.The pyrolysis of 4-methyl pyridine is initiated from the methyl abstraction and hydrogen abstraction procedures which are associated with the understanding of the soot formation and the NOX precursor correspondingly.

主要产物为H_2，C_2H_2，C_4H_2，C_3H_3N和HCN，其中HCN为非低温时的热解产物；通过近阈值电离并导出物种随温度变化的摩尔分数曲线，更详细地定量地描述了产物随温度的变化。4-甲基吡啶热解主要从母体脱甲基和脱氢两个初始反应出发，一种趋势是形成大质量数的苯并或杂环的多环化合物，有助于了解炭黑形成过程中的复杂化学过程；另一趋势是开环生成小的碳氢和腈类物质，实验得出的含氮物质的种类及随温度变化有助于了解NO_x的前驱物质的形成及其变化规律。

MCMB is endowed with the self-sinterability bythe presence of β resin (Benzene Insoluble-Pyridine Soluble fraction called self-binder),which possesses a great molecular weight and a plastic flow property when it is pressedor heat-treated.

MCMB 表面粘结组分(Benzene Insoluble-Pyridine Soluble fraction，又称β树脂)的存在赋予其自烧结性能，该树脂分子量大、残炭率高、一定压力或温度下呈塑性流动、可起粘接剂作用。

Using pyridine-2, 6-dicarboxylic acid as starting material, a novel ligand N^2, N^6-bis(3-methyl-pyridine-2-yl)-pyridine-2, 6-dicarboxamide was synthesized, which contained multidentate and large conjugative system.

以吡啶－2，6-二甲酸为原料，合成含有多个共轭体系多齿配体N^2，N^6-二（3-甲基吡啶）－2-取代吡啶－2，6-二甲酰胺；同时制备它与稀土离子Tb和Eu的配合物，并培养出单晶。

N-(6-methyl-2-pyridine)-amino-methylene-diethyl malonate was produced by condensation reaction of 2-amino-6-methyl pyridine with ethoxymethylene diethyl malonate under optimal conditions that n(2-amino-6-methyl pyridine)∶n(ethoxymethylene diethyl malonate) is 1∶1.3, reacting time 45 min and temperature 130 ℃,the yield of this reaction was 96%,which was 6% higher than that of literature.

在250℃的反应温度下，分别以二苯醚、石蜡油和邻苯二甲酸二乙酯为热载体进行成环反应，得到4-氧-7-甲基-1，8-萘啶-3-羧酸乙酯的收率分别为88.6%、56.3%和61.2%，确定二苯醚为最佳热载体，并发现反应温度对产率的影响最大，原料配比次之，反应时间基本无影响。

Using pyridine-2, 6-dicarboxylic acid as starting material, a novel ligand N2,N6-bis(3-methyl- pyridine-2-yl)-pyridine-2, 6-dicarboxamide was synthesized,which contained multidentate and large conjugative system.

摘 要：以吡啶-2， 6-二甲酸为原料，合成含有多个共轭体系多齿配体N2，N6-二(3-甲基吡啶)-2-取代吡啶-2， 6-二甲酰胺；同时制备它与稀土离子Tb和Eu的配合物，并培养出单晶。

The result of the test showed that the fed quantity of TiO2 was 1.25 mg／mL,the photocatalytic degradation of the pyridine was in conformity with the first order kinetic equation,the feeding of 0.2％H2O2 obviously increased the degradation rate of the pyridine and the nitrogen in the pyridine converted into ammonia nitrogen;the pearlite-loaded TiO2 had the same catalytic effect as that of powered TiO2 and was easy to recover and reutilize.

以钛酸四丁酯水解法制备TiO2，采用溶胶一凝胶法在膨胀珍珠岩上负载TiO2，在UV-TiO2体系中对水中吡啶进行光催化降解，结果表明：TiO2加入量为1.25mg／mL，吡啶的光催化降解符合一级动力学方程，加入0.2％H2O2可明显加快吡啶的降解速度，吡啶中氮转化为氨氮，珍珠岩负载型TiO2与粉末TiO2具有相同的催化效能，且便于回收和重复使用。

Fancy gold-plated dangling earrings with facetted White Opal crystals.

花式镀金悬垂耳环与facetted白欧泊水晶。

This essay chooses the study aim from biology teachers in middle school in Shi Jiazhuang which tells us that most of the middle school biology teachers in Shi Jiazhuang have the"burnout", lower successfulness, individualize.

本文选取石家庄市初中生物教师作为研究对象，运用问卷调查的方法对石家庄市初中生物教师职业倦怠的现状进行调查，调查结果发现，石家庄市初中生物教师这一群体普遍存在职业倦怠，情感枯竭程度偏高，成就感偏低，去个性化程度最为严重。