弱碱性

The adsorption properties of 2-naphthalenesulfonic acid, p-tuluenesulfonic acid, p-chlorobenesulfonic acid and 4, 4'-dinitrostilibene-2, 2'-disulfonic acid onto the macroporous weak base anion-exchange resins were investigated. The influence of pH, salt and temperature on the adsorption equilibrium was also studied.

本论文以芳香磺酸化合物为研究对象，系统地研究了大孔弱碱性阴离子交换树脂对其的吸附行为，考察了温度、pH值、盐含量等因素对树脂吸附性能的影响。

Nevertheless, its fluorescence is enoughintense to be investigated the switch properties in aqueous solution. 5. The results of fluorimetric titrations and spectrophotometric titrations indicate that,for 〓 and 〓, fluorescence of fluorenyl was quenched by transfer of electron from metalcenter to photoexcited state of fluorenyl during coordination of Cu or Ni.

在酸性条件下，未配位的〓和〓都有荧光，在中性及弱碱性条件下与金属铜、镍离子配位后，发生光诱导电子转移，电子由金属离子中心转移至激发态的芴基而使其荧光猝灭。

This hollow ball not only has the function of adsorption filtration depuration of water but also reduce the acidity of water to activation decomposition lessening of hydrone through piezoelectricity and activation of releasing negative ion and sending far infrared. These processes can balance people's PH and make water tasted well and became alkalescence.

该空心球不仅对水质起到吸附、过滤、净化作用，而且通过释放负离子、发射远红外的压电作用和活化作用，降低水的酸性，将水分子活化分解变小，呈为能平衡人体酸碱度，口感好的弱碱性水。

This hollow ball not only has the function of adsorption filtration depuration of water but also reduce the acidity of water to activation decomposition lessening of hydrone through piezoelectricity and activation of releasing negative ion and sending far infrared.

该空心球不仅对水质起到吸附、过滤、净化作用，而且通过释放负离子、发射远红外的压电作用和活化作用，降低水的酸性，将水分子活化分解变小，成为能平衡人体酸碱度，口感好的弱碱性水。

This hollow ball not only has the function of adsorption filtration depuration of water but also reduce the acidity of water to activation decomposition lessening of hydrone through piezoelectricity and activation of releasing negative ion and sending far infrared. These processes can balance people's PH and make water tasted well and became alkalescence.

该空心球不仅对水质起到吸附、过滤、净化作用，而且通过释放负离子、发射远红外的压电作用和活化作用，降低水的酸性，将水分子活化分解变小，成为能平衡人体酸碱度，口感好的弱碱性水。

The concentration of liquid hydrocarbon B is 10%.the dosage of hydrophobe is 15%~20%. The condensation and used environment of defoaming agent were studied ,the experiments show that self-made defoamer can be the same with many bubbly systems,such as anion, zwitterions, Nonionic bubbly liquid et al.and it can be used from acidity to alkalescence conditions.the fitting dosage is 9‰～10‰to polyester,6‰to siloxane-polyester copolymer,and 3‰to mulriple defoamer.

对消泡剂的投加浓度、适用环境等作了相关应用研究，结论为：消泡剂适用的起泡体系较广，阴离子、两性离子、非离子型起泡液均可使用；适用PH值范围可从酸性至弱碱性，适宜加入量为(以占起泡体系的体积分数计)：聚醚酯消泡剂9-10‰，有机硅改性聚醚酯消泡剂6‰，复配消泡剂3‰。

The results indicated that the total surface basic sites was in favor of increasing catalytic activity, while the higher ratio of medium-strength basic sites was good for improving the selectivity of isophorone.

经过镧改性催化剂的表面总碱量增加，可提高催化剂的活性，但增加的碱量主要位于弱碱性位，因而不利于提高催化剂对于异佛尔酮的选择性。

Happy event contain limy alkalescent soil.

喜含石灰质弱碱性土壤。

The marmatite has sulphur-induced flotability at neutral and weakly alkaline pulp.

在中性和弱碱性条件下，铁闪锌矿具有硫诱导无捕收剂浮选。

Micellar effects of dopamine have also been studied by cyclovicltammetric method.

这与弱碱性的多巴胺在一定pH范围内形成的正离子结构有关。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷