弱碱性的

This complex reaction was phenolic electronic substitution reaction, so reaction rate was related with the positive electricity of pro-electronic reagent, as well as the form of aromatic hydrocarbons. Rates of chlorination of phenol and 2-monochlorophenol were faster in alkaline water than that in weak acid water, so 2,4-dichlorophenol and 2,4,6-trichlorophenol formation concentrations increased with the reaction time.

该复合反应属于酚类电子取代反应，反应速率与亲电子试剂的阳电性以及芳香烃的形式有关，碱性水环境中氯取代苯酚和2-一氯酚的速率要快于在弱酸性水环境；随着pH的升高，2，4-DCP和2，4，6-TCP的生成浓度也不断增加。

The product is in the pore structure on the graft copolymer of styrene divinyl benzene [-N amines (CH 3) 2 The ion exchange resin], the less alkaline, in the acidic, neutral and effective exchange of inorganic acid medium. and the larger size can be adsorbed molecules in aqueous solution and the use of anion.

本产品是在大孔结构的苯乙烯二乙烯苯共聚体上接枝叔胺基[-N（CH3）2]的离子交换树脂，其碱性较弱，能在酸性、近中性介质中有效地交换无机酸，并能吸附分子尺寸较大的阴离子以及在非水溶液中使用。

Altogether 26 kinds of proteolytic enzymes were found in the digestive system of Grus grus in all pH value conditions.

灰鹤消化系统蛋白水解酶的活性受pH值的影响和制约，在中性条件下酶活性最强，酸性条件下最弱，总的酶活性表现为中性〉碱性〉酸性；3。

Chemically, fluoroquinlones are an amphoterics molecule processing major ionizable groups, a basic piperazine amine and acidic carboxyl. The form of drugs was greatly affected by the acidity in aqueous solution. Thus the effect of pH values in aqueous solution on the fluorescent properties of fluoroquinolones was studied in details, the spectral properties of each form was characterized. It was found that the fluoroquinolones exhibit weak fluorescence in strong basic solution.

氟喹诺酮类药物分子结构中既有羧基，又有哌嗪氨基，它们所处环境的pH值对其存在型体有很大影响，因此我们详细研究了水溶液的pH值对该类药物光谱特性的影响，并对于各型体光谱特征进行归属，发现强碱性溶液中其发光较弱。

The sequence of effects of these three dispersants on the stability of ITO suspension is PVP＞β-alanine＞triammonium citrate, which is in agreement with the sequence of their acidity and alkalinity in the suspension.

结果表明：3种分散剂分散机制均为静电和空间位阻稳定作用；在相对ITO粉体质量比为5%、最佳球磨分散时间为48 h时，在15 d内ITO浆料的RSH可维持在10%以内；3种分散剂对ITO浆料稳定性的影响由强至弱的顺序为：聚乙烯吡咯烷酮＞β-丙氨酸＞柠檬酸三铵，与其在溶液中酸碱性强弱顺序一致，其中聚乙烯吡咯烷酮的分散效果最好。

For example, alkaline elements can affect diffusion velocity of Zr, Si and O ions although these alkaline elements cannot exist in crystal structure of zircon. However, K rich media and Na rich media exert different effects on the growth of crystal form: in the K rich media, growth speed of prism faces in the vertical direction is much higher than that of pyramid faces, and {111} growth speed in the vertical direction is higher than {311},which decides the formation of bipyramids dominated by {311} pyramids; in the Na rich media, both prism and pyramid grow to a certain extent, but the former is smaller than the latter.{100} growth speed in the vertical direction is lower than {110}, while {111} growth velocity in the vertical diredtion is lower than that of {311},resulting in the growth of the crystal form characterized by {100} short prism and {111} pyramid.

例如，尽管碱性元素并不进入锆石晶格，但它们可以影响Zr、Si、O离子的扩散速度，但是富钾和富钠的介质对锆石晶形发育的影响是有差别的，表现为：在富钾的介质中，将导致柱面的法向生长速度较锥面快得多，而锥面中，｛111｝的法向生长又较｛311｝快，由此决定了形成以｛311｝锥为主的双锥状晶体；在富钠的介质中，柱面和锥面都有一定程度的发育，但前者弱于后者，而柱面中，｛100｝的法向生长较｛110｝慢，由此决定了形成以｛100｝柱和｛111｝锥为主的短柱锥状晶体。

ABSTRACT Applications of natural potato starch and sweet potato starch are confined to a certain extent because of heat-resisting instabili...

天然马铃薯淀粉和甘薯淀粉由于其糊的热不稳定性、较弱的耐酸碱性和较差的冻融稳定性而限制了其使用范围。

In this paper, it was found that the weak ECL signal, generated from electrooxidation fluorescein on the surface of the carbon- printed electrode, was greatly enhanced by the chlortetracycline.

我们发现，碱性介质中的荧光素在碳质印刷电极表面的弱电化学发光信号可被金霉素所增敏。

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