北京大学

胡苷片，赤苷胶囊，藿酮胶囊，益智胶囊，益骨胶囊     

对实验教材中乙酸乙酯合成方法的改进

以乙酸和无水乙醇为原料 ,用五水合氯化高锡为催化剂合成乙酸乙酯 .讨论了SnCl4 的用量 ,原料配比 ,反应温度 ,反应时间对酯的收率的影响     

H2TBP和H2TP(o-NO2)TBP的Sn(Ⅳ)、Mn(Ⅲ)配合物电化学性质

研究了H2TBP，H2TP（o-NO2)TBP的Sn(Ⅳ）和Mn(Ⅲ)配合物的电化学性质，并用Nicholson方法测这了上述配合物的非均相电子传递速率常数。     

比较中日“红“的运用及含义——从语言、文化方面

中国和日本的颜色文化,一方面得益于长时间的文化交流,两国间存在很多相同或相似的地方,另一方面,由于两国有着不同的风俗习惯、历史文化背景,两国间同时也存在着不少不同的地方。文章通过比较“红”在中日两国语言、生活中的运用,分别从语言和文化的角度揭示了中日关于“红”的差异。     

硫化锡金粉制法探讨

硫化锡金粉制备工艺简单,成本低廉,但由于其光泽度和金色失真不被市场认可.通过对反应条件的探讨,找到了一种制备具有一定市场的金粉的方法.     

Preparation and Tribological Performance of Novel Organotin Compound as Lubricant Additive

Oil-soluble stannous naphthenate (SN) is synthesized by using naphthenatic acid and SnO. And its molecular structure is confirmed by IR and multielement oil analyzer (MOA). The tribological performances of the organotin as lubricant additive are evaluated with a four-ball friction and wear tester. These experiments indicate that the wear scar diameter (WSD) and friction coefficient are diminished while the load-carrying capability increased by comparison with that of base oil. The elemental composition of the boundary lubricating film is examined by means of Auger electron spectroscopy (AES). Synergistic effect is found in the load-carrying capability of the complex of SN and sulfured olefin. The analytical results of AES indicate that the good performance of stannous naphthenate is attributed to the formation of a boundary lubricating film containing Sn on the rubbed surface.     

湖南省衡东锡岩洞岩溶风景资源开发研究

衡东锡岩洞以丰富的洞穴岩溶风景资源与古老的洞穴文化古迹紧密结合为特色，具有良好的开发价值，同时也具有良好的开发条件。经过几年的开发已初见成效，但也存在一些问题。作者还对开发衡东锡岩洞提出了一些合理的建议。     

四氯化锡催化合成橙花素

四氯化锡能够代替硫酸作为醚化催化剂.在五水四氯化锡存在下,由β 萘酚和乙醇合成了橙花素(β 萘乙醚).当β 萘酚、乙醇和四氯化锡的物质的量比为1:4:0.114,回流反应12h,醚收率达74.4%.     

Synergetic effect of stannate with o-aminophenol on inhibiting H2 evolution of A1 anode in strong alkaline media

The performance of Al-alloy anode in 4 mol/L KOH with and without stannate and o-aminophenol at 25℃ and 55℃ was studied by hydrogen collection, potentiodynamic polarization and electrochemical impedance spectrum, o-aminophenol acts as a perfect inhibitor because of its adsorbability and forming chelate complex at its optimum concentration of 0.4 mol/L. Stannate enhances the inhibition of o-aminophenol and improves the activity of Al-alloy because of its reduction to tin. There is synergetic effect of stannate with o-aminophenol on the behavior of Al-alloy, and the inhibitive efficiency at 55℃ is better than that at 25 ℃.     

四氯化锡催化合成橙花素

四氯化锡能够代替硫酸作为醚化催化剂，在五水四氯化锡存在下，由β-萘酚和乙醇合成了橙花素(β-萘乙醚)，当β-萘酚、乙醇和四氯化锡的物质的量比为1：4：0．114，回流反应12h，醚收率达74．4％。