选择性

The catalyst, palladium supported with chitosan condensated with salicylaldehyde, was studied in hydrogenation ofα-octene, nitrobenzene, 4-nitrophenol and m-dinitrobenzene, it was active and good selectivity forα-octene and nitrobenzene, when the activation time is 90 min, the catalyst showed the best hydrogenation active.

壳聚糖缩水杨醛负载不同比例PdCl_2的催化剂对α-辛烯、硝基苯、4-硝基酚和间二硝基苯的催化性能进行了研究，结果表明该催化剂活化90 min时加氢催化活性最好，对α-辛烯，硝基苯的催化选择性在催化5 h时达到了100%。

Communication should be strengthened between oculist and patient.

lasik手术是一种选择性手术，医患之间应加强沟通，严格进行术前检查，严格掌握手术的适应证和禁忌证。

It was showed that the imprinted polymer has good affinity and marked selectivity for the template molecule, and can be used to determine the trace amount of TBZ in biological and environemtal samples in an off-line mode. This methodology may be important for accurate investigation and determination of TBZ levels in the environmental and biological matrices.

研究结果表明，戊唑醇分子印迹聚合物对模板分子具有很强的亲和性和显著的选择性，可离线富集各种环境和生物样品中痕量的戊唑醇，在戊唑醇检测中具有实际的应用价值。

Studies on synthesis and selective oxidation of optical perillyl alcohol are an important procedure to develop abundant turpentine oil of our country and to synthesize a series of fine chemicals.

光学活性紫苏醇的合成及其选择性氧化研究是开发我国丰富的松节油资源，利用松节油合成一系列精细化学品的一条重要途径。

The selective extraction and separation of essential oils is of great importance.

挥发油的选择性萃取与分离具有非常重要的意义。

A two-choice olfactometer was developed to determine the behavioural responses of adult cotton bollworm to plant volatiles.

发展了一种选择性嗅觉仪，用这种嗅觉仪测定了棉铃虫成虫对萎蔫的枫杨叶、新鲜的棉花叶、棉花花蕾、玉米叶及玉米花丝气味的反应。

The "Y" type olfactometer test showed that sex pheromones in female solvent extract and female volatiles were both attractive to the males, indicating the presence of sex pheromone in female collections. There was no significant difference in attractive effect between two methods of collection.

Y型嗅觉仪测定表明，雌蚊溶剂浸提和空气收集法获得的提取物对雄蚊有引诱作用，且二者引诱效果无显著性差异(P=0.655)，雄蚊对雄蚊提取物无选择性，说明2种方法均从菊花瘿蚊雌蚊提取到了性信息素。

Objective To study the effects of the selective inhibitor of PDE5 on mouse oocyte maturation in vitro.

目的 研究磷酸二酯酶5（PDE5）选择性抑制剂扎普司托对小鼠卵母细胞体外成熟的影响。

New progress has been got in dephosphorizing of Fe concentrates owing to the development of RA-31 and DA-18 with success. mineral processing ; refractory iron ores ; oolite ; high-phosphorus iron ores ; iron increasing and phosphorus reducing ; flotation reagents

根据鄂西铁矿石的特点进行了选矿药剂及相应的浮选和絮凝选矿工艺的研究，研制成功了RD-31捕收剂和DA-18选择性絮凝剂，采用磁选-脱泥-反浮选工艺流程，对武钢矿业公司科技处提供的鄂西铁矿混合矿样(WE-1样)进行

International bids can generally be divided into two kinds: one is open bids or unlimited competitive bid; another is selected bids or limited competitive bids.

国际的投标一般可分为两大类：一类是公开投标，即无限的竞争投标；一类是选择性投标，即有限的竞争投标。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。