盐溶液

Because the olefinic hydroxyl groups are linked with olefinic carbon, so it can ionize H〓 ion and present the properties of weak acid, and so the olefinic hydroxyl groups change into the structure of alcoholate in the presence of alkali , but the structure of alcoholate may change into the structure of olefine alcohol again, after the Na〓 ions is removed, or when the pH value of its solution turn into pH. Because the structure of the olefine alcohol is not stable and is easy to isomerizate to become the structure of olefine ketone, so there appear the ca. 1730cm〓 C=O absorption peak in the IR spectra of the products.

明确指出了在C〓、C〓富勒醇中存在烯碳羟基与叔碳羟基等二类羟基，烯碳羟基由于与一个共轭体系相连，从而其羟基可以离解而呈现出弱酸的性质，因而在碱性条件下易形成烯醇钠盐的结构，当除去钠离子后或在酸性溶液中，烯醇钠盐结构转变为烯醇结构，但由于烯醇结构不如烯酮结构稳定，从而形成烯醇结构后，烯醇结构异构化为烯酮结构，因此在其产物的IR谱图上出现1730cm〓附近的C=0吸收信号。

I say "could be converted" because regardless of the pH, there will always be some bicarbonate and carbonate present, but at some pH there are enough protons in solution that if they were combined with the bicarbonate and carbonate present, it would all be converted to carbonic acid.

我认为："可转换"，因为不论其ph值，也往往会有一些碳酸氢盐和碳酸盐，但在一些ph值有足够的质子的溶液中，如果他们有机地结合起来，与碳酸氢盐和碳酸盐结合，它都将转为酸性。

It is found that many ripples of membranes emerge in the myelin, which is called the crimple myelin.

初始浓度低于生理盐浓度的水合溶液中，屏蔽效应对浓度变化非常灵敏，因此，myelin的稳定时间较短而且回缩速率较快。3对于能够稳定存在的myelin结构，采用自然蒸发与微操注射两种方法，人为调节其周围的盐浓度，实验发现，myelin内部将出现波纹样皱褶，我们称之为myelin的起皱现象。

The effects of different concentration of NaCl and Na2SO4 double salt solution stress on the seed germination and seedling ability of salt tolerance of seven oat varieties were studied using the standard block method.

为给燕麦抗盐育种和栽培提供理论依据，用不同梯度的NaCl和Na2SO4复盐溶液胁迫处理7个燕麦品种，研究了盐胁迫对燕麦种子萌发、幼苗生长和叶片质膜透性的影响。

It showed that the halophile of Kenyu7 were better than Wuming-5;(2)the contents of proline of the two Zea mays varieties increased significantly,and under high NaCl stress(150mmol/L NaCl or above) the increasing amount of the contents of proline of Kenyu7 was higher than Wuming-5 ,so it showed that the injuries of Wuming-5 imposed by NaCl stress was greater than Kenyu7;(3)the activities of CAT of the two varieties were no obviously changed,while the activities of CAT of Wuming-5 were all higher than Kenyu7 under all concentrations of NaCl solution,which hadn't showed the correlation between the activity of CAT and salinity tolerance.

结果表明，随NaCl溶液浓度的增加：（1）两品种玉米生长均受到严重抑制，发芽势降低，芽和根的长度均呈减小的趋势，总体来看，杂交种垦玉7的发芽势、芽和根的长势均好于自交系无名-5；（2）两品种玉米体内Pro含量均增加，且在NaCl浓度超过150mmol/L时，杂交种垦玉7体内Pro含量增加的幅度明显大于自交系无名-5，而使垦玉7对盐的适应能力强于无名-5；（3）两品种的CAT活性变化幅度均不大，但无名-5的CAT活性在各NaCl浓度条件下均高于垦玉7，这可能是由品种间本身差异造成的，而与品种的耐盐性无直接关系。

The invention discloses a method for measuring seawater chemical oxygen demand by photometry, wherein the seawater exemplar is first pre-processed, then using the basic potassium hypermanganate as reaction system, the potassium permanganate is deacidized quantitatively by organics to produce manganate, using pure water or margin solution as reference ratio, measuring the absorbance an of the manganate at its maximum absorbing wave length 430 nm, drafting the A-COD value operating curve, obtaining the concentration of the organics in the water, i.e.

本发明公开了一种对海水化学需氧量进行测定的光度测定法，该方法首先将海水样品进行预处理，再以碱性高锰酸钾为反应体系，这样海水中的有机物在强碱性介质中与过量的高锰酸钾迅速反应，高锰酸钾被有机物定量还原后生成锰酸盐，以纯水或空白溶液作参比，在锰酸盐的最大吸收波长430nm处测其吸光度A，该吸光度A与海水样品中的有机物的含量具有正相关关系。

Two summer squash varieties with different salinity tolerance, Baimei and Heipi, were used to study the the effects of salinity stress on leaf photosynthesis by treating their seedlings with different concentration of NaCl.

以2个耐盐性不同的西葫芦品种白美西葫芦和黑皮西葫芦为材料，用不同浓度的NaCl溶液进行处理，研究盐胁迫对西葫芦叶片光合性能的影响。

Using different concentration of NaCl treating seedlings, the effects of salinity stress on development, contents of proline and soluble sugar of two summer squash breeds , which were different in tolerance on salinity stress, were investigated.

以两个耐盐性不同的西葫芦品种白美西葫芦和黑皮西葫芦为材料，用不同浓度的NaCl溶液进行处理，研究盐胁迫对西葫芦幼苗生长、叶片脯氨酸与可溶性糖含量的影响。

Meanwhile,the behavior of the complexation between the sulfonated SEBS ionomers and pyriding-containing random coploymers both in dilute solution and in bulk was evidenced by an abnormal increase of the viscosity and Tg .

SEBS磺酸盐离聚物与含吡啶基的无规共聚物在稀溶液和本体中能形成分子间的络合物，这从共混物溶液粘度的反常增大和本体Tg的显著增加得到了证明。

Its preparing process includes dissolving the salts containing metal in group VIB or VII or their mixture in ammonia water until full dissolving, and adding citric acid to stabilize the solution.

其制备方法为：先用氨水溶解含ⅥB族金属或Ⅷ族金属的盐，或二者混合物，使之完全溶解后，加入柠檬酸以使溶液稳定。该溶液稳定性好，制备过程快速、简便、节能。

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。