The invention discloses a catalytic asymmetric hydrogenation reaction. Of the present invention is the role of chiral catalyst, H2 of the prochiral unsaturated compounds to addition reaction to obtain the chiral product, wherein the solvent used in the reaction liquid polyethylene glycol compound. T.....
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公开了一种腕骨骨折复位和固定装置，其包括：贴靠着使用者的前臂掌侧的前臂掌侧板（２）；连接于所述前臂掌侧板（２）的内侧向板（３）和外侧向板（３’），所述内、外侧向板（３、３’）通过至少一根带状部件（６）分别靠近前臂的内、外侧定位；利用另外的至少一根带状部件（６’）贴靠着使用者手背的手背板（４）；其中，所述内、外侧向板（３、３’）各自通过万向连接装置（５）连接到手背板（４）上，所述万向连接装置（５）允许使用者的腕部沿着任意方向运动，并可以在任意角度固定。
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Having a shape memory fabric finishing agent and its preparation method, which is to enhance the silicone-modified polyurethane resin emulsion, a crosslinking agent, deionized water in the catalyst under reaction and made. Wherein the silicone-modified polyurethane resin emulsion is to enhance the q.....
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