溴化十六烷基吡啶一双水相体系萃取分离Bi（Ⅲ）的研究

文章研究了在硫酸铵存在下，乙醇与水能够分为醇／水两相，在分相过程中，Bi（Ⅱ）与I^-及CPB^＋缔合生成BiI6^3-（CPB^＋）3，该三元缔合物能够很好地被乙醇相萃取。通过控制pH值，能够使Bi（Ⅲ）与Mn（Ⅱ）、Fe（Ⅲ）、Co（Ⅱ）、Ni（Ⅱ）、Zn（Ⅱ）、Al（Ⅲ）等常见离子完全分离。     

Me—Br—RB体系浮选——原子吸收法连续测定ppb级的Au，Bi和Cd

本探讨了金属离子－溴化物－罗丹B（Me－Br－RB）体系浮选－原子吸收测定法，并摸索了本体系浮选的最佳条件。这个Me－Br－RB体系可以同时浮选海水或矿样中痕量的Au，Bi和Cd，富集高达100倍，回收率为90－100％，溶液不需分离可直接以空气－乙炔焰原子吸收法测定Au，Bi和Cd的各自含量，结果令人满意。本分析法简单、方便、灵敏、准确且选择性好。同时还探索了Cr（Ⅲ），Mn（Ⅱ），Ca（Ⅱ），Mg（Ⅱ），Zn（Ⅱ），Cu（Ⅱ），Co（Ⅱ），Ni（Ⅱ），Al（Ⅲ），Fe（Ⅲ），Au（Ⅲ），Bi（Ⅲ）和Cd（Ⅱ）十三种离子的浮选行为。     

镉-铽-铕-强力霉素-曲通X-100体系增敏效应研究

研究了在表面活性剂TritonX-100存在下，Cd2+和Tb3+对Eu（Ⅲ）-强力霉素（DC）体系的协同荧光增敏效应。建立了Cd（Ⅱ）-Tb（Ⅲ）-Eu（Ⅲ）-DC-TritonX-100协同荧光增敏体系，并提出了一个高灵敏度测定稀土元素销的荧光分析法.     

硫酸铵-碘化钾-孔雀石绿体系浮选分离镉(Ⅱ)的研究

研究了硫酸铵-碘化钾-孔雀石绿体系浮选分离镉(Ⅱ)的行为,探讨了Cd(Ⅱ)与常见离子分离的条件。结果表明,控制水相的pH=3.0,能使Cd(Ⅱ)与Mn(Ⅱ)、Fe(Ⅲ)、Co(Ⅱ)、Ni(Ⅱ)、Zn(Ⅱ)、Al(Ⅲ)、Cr(Ⅲ)很好地分离。     

溴化十六烷基吡啶-双水相体系萃取分离Bi(Ⅲ)的研究

文章研究了在硫酸铵存在下,乙醇与水能够分为醇/水两相,在分相过程中,Bi(Ⅲ)与I-及CPB 缔合生成BiI63-(CPB )3,该三元缔合物能够很好地被乙醇相萃取。通过控制pH值,能够使Bi(Ⅲ)与Mn(Ⅱ)、Fe(Ⅲ)、Co(Ⅱ)、Ni(Ⅱ)、Zn(Ⅱ)、Al(Ⅲ)等常见离子完全分离。     

环庚酮缩氨基硫脲Cu(Ⅱ)、Fe(Ⅱ)、Zn(Ⅱ)配合物的直接电化学合成

本文在以环庚酮缩氨基硫脲（HL）为配体的非水溶剂中,用Cu、Fe、Zn金属做阳极,首次用电化学金属阳极氧化法合成了环庚酮缩氨基硫脲（HL）与Cu（Ⅱ）、Fe（Ⅱ）、Zn（Ⅱ）的金属配合物,通过元素分析、红外光谱、紫外光谱、摩尔电导等对配合物进行了表征．     

水杨醛缩邻氨基酸金属配合物合成(Ⅰ)

本文合成了水杨醛缩邻氨基酚的几种新的金属配合物，并进行了摩尔电导、红外、元素分析等表征，结果表明水杨醒缩邻氨基酚与Zn（Ⅱ）、Ph（Ⅱ）、Mn（Ⅱ）、Co（Ⅱ）形成2：2型中性配合物。     

金属-有机超分子聚合物[Zn5（D,L-Alaninato）4（Terephthalate）3]n的合成及晶体结构分析

以D,L-丙氨酸（D,L-Alanine）和对苯二甲酸（Terephthalic acid）为有机配体,与硝酸锌在水热条件下反应得到了金属-有机超分子聚合物[Zn5（D,L-Alaninato）4（Terephthalate）3]n（1）.在该化合物中,Zn（Ⅱ）离子与对苯二甲酸相互作用形成了二维的金属-有机配位层状框架,丙氨酸桥联Zn（II）离子形成了一维的配位链状结构.配位层与配位链之间通过氨基酸的桥联作用连接在一起形成了三维的超分子框架结构.     

心电图STⅡ/Ⅲ比值在急性下壁心肌梗死相关动脉预测中的价值

目的通过对急性下壁心肌梗死时心电图Ⅱ、Ⅲ导联ST段抬高幅度（STⅡ／Ⅲ比值）的比较分析，来预测梗死相关动脉（infarction related artery IRA）。方法回顾性分析72例首次急性下壁心肌梗死患者的入院心电图与冠状动脉造影资料。结果对急性下壁心肌梗死时心电图指标STⅡ／Ⅲ与IRA关系的统计分析表明，STⅡ／Ⅲ在右冠状动脉（RCA）组绝大多数小于1而左旋支（LCX）组多大于等于1（P〈0．011，排除RCA和LCX皆有显著病变的病例后仍然P〈0．01。结论心电图STⅡ／Ⅲ比值是预测急性下壁心肌梗死患者IRA的较准确的指标。     

罗丹明B分光光度法测定药物中微量锌

研究了Zn（Ⅱ）一SCN--RhB显色反应体系,建立了分光光度法测定药物中微量Zn（Ⅱ）的新方法．结果表明,在HAc—NaAc缓冲介质中,Zn（Ⅱ）一SCN--RhB离子缔合物在555nm处有一较强的吸收峰．在最佳实验条件下,Zn（1I）的质量浓度在0．080～0．80big·mL^1的范围内服从比尔定律,其表观摩尔吸收系数￡为5．5×10^4L·mol^-1·cm^-1．该方法直接用于测定药物制剂中痕量锌含量,结果较满意．     

卡思卡特城堡

It is worthy of noting that, whilst Crookston Castle witnessed the earlier and happier portion of Mary's variegated life,     

不同的吃喝玩乐

一、吃和喝吃苹果 eat an apple, 吃药 take medicine,吃糖 have some sweets,吃饭 have one's meals,吃馆子 dine out,吃惊 be surprised/     

漏洞百出的教育

Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help?     

只要努力,不要后悔

There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love.     

浅谈移民问题

Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject.     

Sister Carrie, an Adherent of Desires

Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities.     

Improvement of one-cycle controller by use of proportional integral differential controller

1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec…     

库克斯顿城堡

城堡, 是欧洲典型的建筑之一, 每个城堡都有一个美丽的传说或是一段历史。从本期开始, 我们将推出“城堡之旅”, 带各位读者去浏览、观赏欧洲各地的城堡, 开始一段文化与历史的旅途!     

胡主席在印度,我却在中国

Today, Sunday morning, I sit thinking and typing at my computer. My thoughts are in my homeland, India and my body is in China. The body is here and mind there for a good reason. Mr. Hu is president and I am resident and both are in each other's countries (what a difference the absence of one small letter makes!). Mr. Hu will return in a few days and I will stay on longer.