Benedict ' s solution is an alkaline solution of copper ( ii ) sulfate , which is reduced to insoluble copper ( i ) oxide by reducing sugars , giving a red precipitate 本尼迪克特溶液是硫酸铜(二价)的碱性溶液,它可以通过还原糖被还原为不溶性的铜(一价)的氧化物,产生红色的沉淀物。
It is well known that nf membrane can only desalinate monovalent salts . however , the separation of bivalent salts from water - soluble organics is very important in modern chemical industry 荷电镶嵌膜可用于一价、二价电解质的浓缩及有机原料的脱盐,其膜通量接近于工业纳滤膜的水平。
In existential sentences , location and time phrase before mv or bv verb can be viewed as the subject , no matter whether it has semantic choice relation with the verb 存现句中,不论是一价动词前还是二价动词前的处所和时间词语,也不论其与动词是否具有语义上的选择关系,都可以看成主题。
The different bivalent cations with the same final concentration were put into the dnaase reacting system for 15 minute at ph5 . 4 , at 41 , then dnaase ' s activity unit was detected 在dna酶的酶促反应体系中加入终浓度相同的二价金属阳离子41下、 phs 4准确反应15分钟后测定酶的活力单位。
A charged mosaic membrane with ideal selectivity has apparently advantage over the conventional nanofiltration ( nf ) membrane , which can be used to concentrate the monovalent salts and bivalent salts 我们知道,传统的纳滤膜仅仅能透过一价盐,而在化学工业中对于二价盐的选择性传递有时尤为重要。
On the basis of distinctions of verbal valency , verbs used within oracle inscriptions can be divided into the following four categories : zero - valent verbs , monovalent verbs , bivalent verbs and trivalent verbs 摘要甲骨文中的动词可以根据其配价的不同分成以下四类,即零价动词、一价动词、二价动词、三价动词。
In general , bu is used to negate non - verbs , zero - valent verbs and monovalent verbs , while though fu is often used to negate bivalent verbs and trivalent verbs , bu can also be used to negate these two verb types 一般说来,非动词、零价动词、一价动词要用不来否定,而二价动词、三价动词常用弗来否定,但也可以用不来否定。
The forming that the color is leather , result from the reason that because with oxidizing the inferior iron two price irons and changing and oxidizing two irons three times under oxidizing the condition in hetian jade , so it is secondary 色皮的形成,是由于和阗玉中的氧化亚铁二价铁在氧化条件下转变成三氧化二铁所致,所以它是次生的。
The chemical analysis of the soil extracted solution has shown that the soluble salt in the soil is predominated by the divalent ions ca2 + and mg2 + which mean that the soil aggregates have been chemically stable during the field experiment 同时,对土壤浸剂液的化学成分的分析结果表明,浸提液中二价的钙、镁离子占优势,这使土壤微团聚体处于一种化学稳定的状态。
The transfer vector pbdtk - uni can be used for the construction of recombinant prv expressing foreign gene ( s ) . postgraduate : tianzhijun specialty : preventive veterinary science supervisors : prof . li yijing prof . tong guangzhi 以上结果表明所构建的具有自主知识产权的通用prv转移载体pbdtk - uni是成功的,为利用该载体构建伪狂犬病病毒二价基因工程疫苗提供了技术平台。