查询词典 acidity

The experimental results proved the intermediate product of H2S in the leaching of marmatite. The results also showed that oxygen, element sulfur disperser as well as chloride ions could accelerate the electrochemical oxidation of marmatite in sulfuric acid. The electrochemical oxidation of sphalerite was retarded but that of marmatite was promoted with the increase of acidity.

结果表明：在铁闪锌矿浸出过程中有H2S中间产物生成；通氧、元素硫分散剂以及氯离子引入浸出体系均能明显促进铁闪锌矿的电化学氧化；随硫酸浓度升高，铁闪锌矿的电化学氧化不断加强而闪锌矿的电化学氧化受抑。

Volume of cell ill will color is larger, polygonal, afterbirth film is clear, afterbirth qualitative translucence is fine meshy, afterbirth nucleus shrinkage, visible nucleus channel and nuclear different, nucleolus is unidentified show; and acidity of qualitative be addicted to of afterbirth of acerbity cell of be addicted to submits fine grained form, apparent nuclear week sky is dizzy it is thus clear that.

嫌色细胞体积较大，多角形，胞膜清楚，胞质半透明细网状，胞核皱缩，可见核沟及核异型，核仁不明显；而嗜酸细胞胞质嗜酸性呈细颗粒状，可见明显的核周空晕。

The proton affinity calculations showed that the acidity of isomorphously substituted mordenite increases in the order:BMORGaMORAlMOR.

质子亲合势分析表明与硅铝丝光沸石相比， B和Ga进入骨架导致丝光沸石分子筛的Brnsted酸性有所减弱，其酸性依次为：BZSM5GaZSM5AlZSM5。

State Key Laboratory of Coal Conversion, Institute of Coal Chemistry,Chinese Academy of Sciences, Taiyuan 030001The siting of B, Al or Ga and the bridging hydroxyl group in mordenite framework were studied by using ab initio HartreeFock methods. The influence of the presence of B or Ga in the framework on the Bronsted acidity of mordenite was investigated.

用从头计算HartreeFock方法研究了B、Al、Ga等同晶取代进入丝光沸石骨架后可能存在的位置，确定了与电荷平衡质子结合的氧位置，考察了B、Ga等杂原子进入骨架对丝光沸石Brnsted酸性的影响。

As to MNa-ZSM-5, the order is CuNa-ZSM-5〓AgNa-ZSM-5＞CeNa-ZSM-5＞ CoNa-ZSM-5〓FeNa-ZSM-5＞Na-ZSM-5. Among the samples tested, CoHZSM-5 shows the highest activity, the conversion of NO is about 60%, and the activity is higher than that of CoNa-ZSM-5 with the same exchanged level. Suggests that the exist of some Bronsted acidity is benefited for this reaction. For Fe-ZSM-5, the activity are changed obviously with the various of preparation condition. It was also found that mordenite zeolite is a good support for this reaction.

其中，Co-HZSM-5表现出最佳的反应活性，NO的最高转化率达60％以上，并且活性明显高于具有相同交换度的CoNa-ZSM-5，表明适量的酸中心存在有利于该反应的进行；对于Fe-ZSM-5，制备条件不同Fe-ZSM-5的反应活性影响很大，反应的活性中心应是处在交换位上的铁离子；另外，通过考察不同载体对铁离子交换分子筛催化剂反应性能的影响，发现丝光分子筛也是较好的催化剂载体。

Naphthenic acid corrosion is the tough problem in processing high-acidity crude.

环烷酸腐蚀是炼制高酸值原油时遇到的一个难题。

In the same time, the intra-molecular photoinduced electron transfer process between naphthyl group and nitrogen atom of tertiary amine group at the tip of molecule was found and this process strongly depends on the acidity of solution.

通过对该类化合物在溶液中的光物理行为以及酸度影响的比较研究，观察到以叔胺为骨架的三足化合物存在分子内光诱导电子转移，且这一过程强烈地依赖于介质的pH值；叔胺基的氮原子质子化将会减弱这一PET过程。

BET, acid amount and distribution of acidity of niobic acid catalysts were investigated.

测定了固体铌酸催化剂的比表面积、表面酸强度及表面酸量。

The structure and surface acidity of the niobic acids were analyzed by XRD, BET and TG/DTG.

用XRD、BET和TG/DTG对铌酸的结构特征和表面酸强度进行了分析。

In order to discover acid-tolerant Rhizobium meliloti that can nodulate alfalfa high-effectively on acidic soil, researches were explored to isolate rhizobia from alfalfa nodules on acidic soil (pH5.2), methods based on the thesis of adaptive acid-tolerance response of the Rhizobia were adopted, six strains were isolated, which could grow on solid medium with pH4.8 steadily. In addition, the nodulation characteristics, growth curves and mean generation time under different acidity of the strains were examined.

为获得能够使紫花苜蓿在酸性土壤中高效结瘤的耐酸根瘤菌，该研究从酸性土（pH5.2）上生长的紫花苜蓿根瘤中分离到若干菌株，利用根瘤菌对酸的适应性耐受反应筛选到六株能够在pH4.8的固体培养基上稳定生长的菌株，并检测了这六株菌的结瘤特征、不同酸度下的生长曲线和平均代时。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。