火焰原子吸收法测定银电解液中的钯

研究了在银电解液中，采用原子吸收直接测定钯的含量。在0．7mol／L HNO3介质中测定钯时，检出限0．03μg／mL，特征灵敏度0．04μg／mL1％，线性范围1～3μg／mL，相关系数0．9998。与经典法DbDo(二苄基二硫代乙二酰胺)测钯对照分析，结果令人满意。     

示波极谱法连续测定锌电解液中的钴与镍

在pH9．8时，柠檬酸钠—NH4C1，亚硝基R盐和溴化十六烷基三甲铵体系中，镍与钴均有灵敏的络合吸附波，其二阶导数峰电位分别为—0．62V(vs．SCE)和—0．84V(vs．SCE)．镍和钴的线性范围分别为0．01-1.4μg/mL,0．0012—1．0μg/mL．检出限分别为0．004μg/mL，0．0006μg/mL．方法用与锌电解液中微量钴与镍的测定，结果满意．     

硝酸银吸光光度法测定高纯二氧化锗中痕量砷

研究硝酸银吸光光度法测定高纯二氧化锗中痕量砷的新方法．高纯二氧化锗中主体锗分离后，痕量砷被还原成砷化氢气体逸出，在酸性吸收液中还原硝酸银为单质银，单质银在聚乙烯醇作用下显均匀的黄色，其最大吸收波长在400nm处，砷量在0．2—5μg／10ml吸收范围内符合比耳定律．方法检出限为O．06μg／ml，加标回收率为96％-103％，结果令人满意。     

碘化钾-乙醇萃取火焰原子吸收法测定痕量银和镉

研究了在硫酸铵存在下，碘化钾－乙醇体系萃取分离银和镉，并据此建立了萃取火焰原子吸收测定银、镉新方法。该方法银、镉检出限分别为0.029μg/ml和0.020μg/ml，银、镉线性范围分别为0－7.0μg/3ml乙醇和0－3.0μg/3ml乙醇。实测岩矿样品，结果令人满意。     

无砷锌还原测定锡合金中砷的分光光度法研究

研究了无砷锌还原测定微量砷的新银法．根据试验结果，吸收波长选择λ=410nm，表观摩尔吸光系数ε=2．51×104．砷的线性范围为0～13μg／mL．用于锡合金中砷的测定，获得满意结果。     

巯基棉分离银取代亚铁氰化物光度法测定矿物岩石中的银

本文研究了在亚硝基R盐存在下,银取代亚铁氰化钠的显色反应。研究表明,显色适宜酸度pH=4和pH=6,络合物最大吸收波长为620nm,银含量在0—100μg/25ml范围内符合比尔定律。此方法可用于一般地质样品中微量银的测定。     

铌—溴酸钾—偶氨氯膦Ⅲ催化光度法测定痕量铌

在稀硫酸介质中，铌灵敏催化溴酸钾氧化偶氮氯膦Ⅲ(CPAⅢ)的褪色反应，据此建立了催化动力学光度法测定铌的新方法。线性范围为0．004—0．2μg/mL，检出限2．6μg/L。本法准确、灵敏、简便，且体系稳定，用于煤渣试样中微量铌的测定，结果满意。     

ICP—AES法测定锌铝合金中的微量镧铈

采用电感耦合等离子体原子发射光谱（简称ICP—AES）法同时测定锌铝合金中的镧、铈元素。对样品溶解条件及影响其光谱测定的各种因素进行了研究，确定了试验的最佳测定条件。结果表明，La的检出限为0．0011μg／mL，Ce的检出限为0．013μg／mL，回收率97．0％～104．0％，相对标准偏差（RSD）小于1．00％。方法中La的测定范围0．001％～0．5％，Ce的测定范围0．005％～0．5％。该方法简便、快速、准确，用于锌铝合金中La、Ce的测定，结果满意。     

双硫腙水相法测水体中锌离子浓度的改进

本方法对双硫腙水相分光光度法测定水体中微量锌做了较大的改进，使锌离子的测定范围由0．1μg／mL提高到0—4μg／mL。用本方法与原子吸上法作对比分别测锌合成水样的浓度，偏差为0．9％，是一种简单、准确、廉价的新方法。     

粗硒中银、铜、铅、铋、铁原子吸收光谱法分析方法的研究

研究了无需将硒进入挥发炉挥发，而是采用原子吸收光谱法直接测定（Se90％以上）Ag、Cu、Pb、Bi、Fe的分析方法。并对方法的线性范围、相关系数、特征灵敏度、检出限、精密度、准确度、不同方法分析数据的比对评定做了细致的探索。经实验证明在5％盐酸介质中，测定粗硒中银、铜、铅、铋、铁，其线性范围分别为（μg／mL）1～1．5、1～3、1～4、1～3、1～4；相关系数分别为0．9999、0．9998、0．9995、0．9998、0．9993；特征浓度（μg／mL）分别为0．013、0，018、0．13、0．092、0．086；检出限（μg／mL）0．00083、0．0031、0．0044、0．056、0．014。RSD为0．50％～3．22％，样品加标回收率为98．75％～101．25％，测定范围0．10％～0．40％。     

Advances in Organolanthanide Chmistry in China

ＡｄｖａｎｃｅｓｉｎＯｒｇａｎｏｌａｎｔｈａｎｉｄｅＣｈｍｉｓｔｒｙｉｎＣｈｉｎａＳｈｅｎＱｉ（沈琪）（ＤｅｐａｒｔｍｅｎｔｏｆＣｈｅｍｉｓｔｒｙ，ＳｕｚｈｏｕＵｎｉｖｅｒｓｉｔｙ，Ｓｕｚｈｏｕ２１５００６，Ｃｈｉｎａ）Ｒｅｃｅｉｖｅｄ：Ａｐｒｉｌ２...     

风吹石墨在莱钢6m焦炉的应用

针对石墨在焦炉内的生成机理,对莱钢7号、8号焦炉炉墙上的石墨采用压缩空气进行吹扫,有效控制了石墨的生长速度,降低了劳动强度。     

浅谈博茨瓦纳某工程项目管理经验和总结

以博茨瓦纳某地方法院工程为例，简要介绍了在非洲承揽工程项目的管理经验和总结。     

武钢炼焦技术进步

介绍武钢焦化公司50年来炼焦技术进步,重点阐述炼焦配煤技术研究、焦炉热修补维护、140t／h干熄焦技术消化以及7．63m特大型焦炉的技术创新。     

Benzimidazole resistance in cyathostomes in horses in the Ukraine

The efficacy of treatment with cambendazole was tested in 1-year-old horses on a farm in Dubrovka, Ukraine. Thirty-five horses were treated. Their egg output was compared on the day of treatment and 14 days later with that of 33 untreated horses. Before treatment the mean number of eggs g-1 faeces was 614 in the controls and 766 in horses that had been treated. After 14 days the mean egg output in the controls was 580 and in the treated horses 369. This means a reduction of 54.5%. Only cyathostome larvae could be cultured from faeces collected after treatment. It can be concluded that benzimidazole resistance in cyathostomes is present in the Ukraine.     

重庆高校推进产学研合作的案例分析

以重庆大学、重庆邮电大学和重庆理工大学为例,剖析重庆高校推进产学研合作的基本模式,已经取得的突出成绩,分析总结其基本经验.从完善政策法规体系、强化经济调控、建立组织机构、加强中介建设及开展国际产学研合作等方面,提出了深入推进重庆高校产学研合作的对策建议.     

Trends in Temperature Extremes in Association with Weather-Intraseasonal Fluctuations in Eastern China

Trends in the frequencies of four temperature extremes (the occurrence of warm days, cold days, warm nights and cold nights) with respect to a modulated annual cycle (MAC), and those associated exclusively with weather-intraseasonal fluctuations (WIF) in eastern China were investigated based on an updated homogenized daily maximum and minimum temperature dataset for 1960-2008. The Ensemble Empirical Mode Decomposition (EEMD) method was used to isolate the WIF, MAC, and longer-term components from the temperature series. The annual, winter and summer occurrences of warm (cold) nights were found to have increased (decreased) significantly almost everywhere, while those of warm (cold) days have increased (decreased) in northern China (north of 40°N). However, the four temperature extremes associated exclusively with WIF for winter have decreased almost everywhere, while those for summer have decreased in the north but increased in the south. These characteristics agree with changes in the amplitude of WIF. In particular, winter WIF of maximum temperature tended to weaken almost everywhere, especially in eastern coastal areas (by 10%-20%); summer WIF tended to intensify in southern China by 10%-20%. It is notable that in northern China, the occurrence of warm days has increased, even where that associated with WIF has decreased significantly. This suggests that the recent increasing frequency of warm extremes is due to a considerable rise in the mean temperature level, which surpasses the effect of the weakening weather fluctuations in northern China.     

Apoptosis in experimental myocardial infarction in situ and in the perfused heart in vitro

We report the appearance of apoptotic cells in experimental myocardial infarction (rabbit heart) in in situ and in vitro preparations. Apoptosis was recognized by intravital staining with Hoechst 33342 (Ho342), by nick-end labeling (TUNEL) and by DNA laddering. A steady rise in the relative number of apoptotic cardiomyocytes (apoptotic index) was noted in in situ preparations. Apoptosis was first noted 6 h after the onset of ischemia with its highest value occurring after 72 h. Apoptotic nuclei were absent in remote areas of the left and right ventricles. Apoptotic nuclei within the infarcted area showed diminished intensity of Ho342 fluorescence. Three days after ischemia, a border zone adjacent to the infarcted area consisting of apoptotic macrophages was recognized. A novel finding was the appearance of apoptotic cardiomyocytes in the isolated perfused ischemic heart. Occurring as early as 50 min after the onset of ischemia, a high apoptotic index was present adjacent to the ligature placed around the coronary artery. This observation provides the opportunity to selectively examine factors leading to apoptosis in the ischemic heart under controlled experimental conditions.