选择性

基本解释 (translations)

selectivity

与选择性相关的网络例句 [注：此内容来源于网络，仅供参考]

The effects of various reaction conditions were studied by GC analysis. Reaction time has slight effect on the conversion of acenaphthene. The selectivity of N-phenyl aminoacenaphthene increases with reaction time. Biacenaphthenyls or N-phenyl aminoacenaphthene is in the majority, 77.6% or 90.2% when the molar ratio of AlCl3 to acenaphthene is 1.2 and 2.4 respectively.

GC考察了不同反应条件对苊转化率和产物选择性的影响，时间对苊转化率影响不大，N-苯基氨基苊的选择性随着时间增加而增大；随着AlCl3用量的增加，苊转化率和N-苯基氨基苊的选择性随之增加；AlCl3与苊的摩尔比为1.2和2.4时，产物中联苊和N-苯基氨基苊的选择性分别达到77.6%和90.2%。

In 20℃ and 40℃, the selectivity of Cd~(2+) to analcime is less than that of Na~+ to analcime; in 60~(2+) and 80℃,the selectivity of Cd~(2+) to analcime is more than that of Na~+ to analcime.

在20℃和40℃时，方沸石对Cd~(2+)的选择性小于对Na~+的选择性，在60℃和80℃时，方沸石对Cd~(2+)的选择性大于对Na~+的选择性。

These dendritic NOBIN derived Schiff base ligands have been applied to titanium catalyzed hetero-Diels-Alder reaction of Danishefshy's diene and aldehydes, affording the corresponding 2-substituted 2, 3-dihydro-4H-pyran-4-one in quantitative yields and excellent enantioselectivities (up to 97. 2%ee). Comparing the reactivities and enantioselectivities of reaction catalyzed by the titanium complexes of these Schiff base ligands, it was found that a series of ligands L〓 were superior to the other three series of ligands L〓, L〓 and L〓, a significant positive NLE and a dendrimer effect existed in the L〓 dendritic catalyst system. The disposition of the dendritic wedges and the dendron size in the ligands were observed to have a significant impact on the enantioselectivity of the reaction.

NOBIN衍生的树枝状大分子希夫碱手性配体与钛形成的配合物在催化不对称杂Diels-Alder反应中的应用将得到的四个系列NOBIN衍生的树枝状希夫碱三齿手性配体与四异丙氧基钛形成的配合物用于催化Danishefsky's diene与醛的不对称杂Diels-Alder反应，通过反应条件的优化，获得了定量的收率和最高达97.2％ee值的对映选择性；考察了这四个系列NOBIN衍生的树枝状希夫碱钛配合物的催化活性和对映选择性，结果发现它们的活性次序依次为L〓≈L〓＞L〓＞L〓，对映选择性次序依次为L〓＞L〓＞L〓＞L〓。

The inventive has excellent activity of diolefin hydrogenation and selectivity, sulfur resistance and arsenic resistence, extremely excellent pyrolysis gasoline selective hydrogenation performance, can meet the process requirements of pyrolysis gasoline selective hydrogenation.

本发明的催化剂具有优异的双烯加氢活性和选择性，以及抗硫和抗砷能力，具有十分优异的裂解汽油选择性加氢性能，能够适应裂解汽油选择性加氢的工艺要求。

This paper provides a comprehensive review and critical analysis on the different reaction pathways for catalytic conversion of glycerol into commodity chemicals, including selective oxidation, selective hydrogenolysis, selective dehydration, pyrolysis and gasification, steam reforming, thermal reduction into syngas, selective transesterification, selective etherification, oligomerization and polymerization, and conversion of glycerol into glycerol carbonate.

本文提供了一个全面的审查和批判性分析的不同的反应途径甘油催化转化成商品的化学品，包括选择性氧化，选择性氢解，选择性脱水，热解气化，重整，热还原成合成气，选择交换，选择性醚化，齐聚和聚合，并转换成甘油甘油碳酸盐。

Six hundred and forty-two patients (aged 10 months to 37 years) were treated with combined operations of different operations, including traditional operations on soft tissue release, osteotomy, selective posterior rhizotomy, selective rhizotomy and converse anastomosis, neurectomy, etc. The follow-up period ranged from 6 months to 4 years (mean 18 months).

方法］应用传统的软组织松解延长手术、截骨手术、选择性脊神经后根切断术、脊神经后根选择性切断逆向吻合术，以及选择性周围神经切断等手术，对642例年龄在10个月～37岁的脑瘫病人采用不同的手术组合治疗，随访6个月～4年，平均18个月。

This paper pointed out that the complex sentence of selective default and its closely related,"would rather" sentence, and "even if" the sentence is similar to selective, concessions are in the lower body show the premise of selective, and selective concessions are inseparable ; However, the two sentences in selective areas there are also many different and specific expression: the different levels of concessions, the focus of different default, choose different context, the choice of the situation is different and selectivity Weak, such as different levels of five.

本文指出，复句的选择性与其预设密切相关，"宁可"句和"即使"句的选择性具有相同之处，都是在让步的前提下体现出选择性，让步性与选择性是密不可分的；但是，两个句式在选择性方面也存在很多不同之处，具体体现为：让步的程度不同、预设的重点不同、选择语境有所不同、选择项的情况不同以及选择性强弱程度不同等五个方面。关键词：让步复句；预设；选择性

At the heavy metal concentration of 3-4ppm, our study on adsorption capacity, adsorption selectivity of montmorillonite, illite and kaolinite to Cu〓、 Pb〓、 Zn〓、 Cd〓、 Cr〓 shows that the adsorption capacity is mainly determined by the capacity of exchangeable cations and the adsorption capacity of the three clay minerals decreases in this sequence: montmorillonite ＞＞ illite＞kaolinite. It is found that clay minerals have obvious adsorption selectivity to various heavy metals. Montmorillonite exhibits a stronger affinity to Cr〓 and Cu〓 while kaolinite and illite sorb Cr〓 and Pb〓 more effectively. At the same heavy metal concentration, adsorption amount of clay minerals to heavy metals increase with increasing pH value of the solution.

在痕量浓度下，研究了蒙脱石、伊利石、高岭石三种粘土矿物对Cu〓、Pb〓、Zn〓、Cd〓、Cr〓五种重金属离子的吸附容量、吸附选择性及其介质条件对吸附量的影响，结果表明，粘土矿物的阳离子交换容量越大，对重金属离子的吸附容量也越大，其大小顺序为蒙脱石＞＞伊利石＞高岭石；同时，不同粘土矿物对重金属离子具有明显的吸附选择性，蒙脱石对Cr〓和Cu〓有较好的选择性，伊利石和高岭石则对Cr〓和Pb〓有较好的选择性；随着吸附溶液pH值的增大，其吸附量有增加的趋势。

The results show that the maximum growth quantity of Nocardia can be achieved after culturing 120 h and obvious selective adsorption of Nocardia on the surface of pyrite and sphalerite can be detected. The maximum adsorption rate on the surface of pyrite is 96.99%, whereas it is less than 20% in the case of sphalerite. Adsorption equilibrium can be attained within 20 min on the surfaces of the two minerals. pH value is the key factor influencing upon selective adsorption, and the difference of adsorption quantity on the surfaces of two minerals is apparent when pH is between 4 and 10. Slurry concentration over 6 g/L is favorable to selective adsorption. Nocardia cell concentration, stirring speed and temperature have no obviously effect on selective adsorption.

结果表明：培养120 h后诺卡氏菌达到最大生长量；诺卡氏菌在黄铁矿和闪锌矿表面发生明显的选择性吸附，在黄铁矿表面的最大吸附率可达到96.99％，而在闪锌矿表面的吸附率大都在20％以下；诺卡氏菌在两种矿物表面于20 min内即可达到吸附平衡； pH值是影响诺卡氏菌在两种矿物表面发生选择性吸附的关键因素， pH在4～10之间时，选择性吸附现象明显；矿浆浓度超过6 g/L时有利于发生选择性吸附；细胞悬浊液浓度、搅拌速度和温度对吸附效果影响不大，均可产生选择性吸附。

Under the same condition as methane partial oxidation, the reaction results are as follows: CH4 conversions is 88%, CO selectivity is 90%, H2 selectivity is 68%, CO2 selectivity is 12%.H2-TPD indicates that it is difficult for H2 to desorb from catalyst. It is estimated that the reaction between hydrogen and oxygen being absorbed is the primary approach to produce H2O, and it maybe lead to the lower H2 selectivity.

反应结果如下：CH4转化率88%；CO选择性90%；H2选择性68%，CO2选择性12%。H2-TPD实验表明，H2在催化剂表面难于脱附，表面氢与表面氧反应可能是生成H2O的主要途径，这也可能是H2选择性比较低的原因。

与选择性相关的网络解释 [注：此内容来源于网络，仅供参考]

Selective credit control：选择性信贷控制,选择性信用管理,信用质量控制

selective cracking process 选择裂化 | selective credit control 选择性信贷控制,选择性信用管理,信用质量控制 | selective credit controls 局部信贷控制,局部信贷控制

selective flocculant：选择性絮凝剂

selective fire 选择性发射 | selective flocculant 选择性絮凝剂 | selective flooding 选择性注水

selective herbicide：选择性除莠剂; 选择性除草剂

selective collection 选择性收集 | selective herbicide 选择性除莠剂; 选择性除草剂 | selective non-catalytic reduction (SNCR) 选择性非催化还原

selective inattention：选择性不在意

selective identification facility 选择性识别器 | selective inattention 选择性不在意 | selective jamming 选择性干扰

ISE：离子选择性电极

钠电极名称: 离子选择性电极(ISE) 易清洗型(固体膜)自由液接设计电极名称: 离子选择性电极(ISE) 可更换感应模块自由液接设计电极名称: 离子选择性电极(ISE) 水溶性气体测量电极名称: 离子选择性电极(ISE) 可更换模块式设计

Paste Special：选择性粘贴 选择性贴上

password 口令 密码 | Paste Special 选择性粘贴 选择性贴上 | pasteclip 粘贴 贴上截取

Paste Special：选择性贴上 选择性黏贴

Paste 贴上 黏贴 | Paste Special 选择性贴上 选择性黏贴 | Paste as??? 贴上超连结 黏贴为超级链接

selective permeation：选择性渗透

selective perforating 选择性射孔 | selective permeation 选择性渗透 | selective plugging 选择性封堵

selective sorbent：选择性吸附剂

selective solvent extraction 选择性溶剂萃取 | selective sorbent 选择性吸附剂 | selective spin decoupling 选择性自旋去偶

selective herbicides：选择性杀草剂

选择性放牧 selective grazing | 选择性杀草剂 selective herbicides | 选择性培养基 selective medium