国内银的分析测定研究进展（一）——国内光度法测定银的研究进展

归纳总结了国内主要刊物上所发表的光度法测定银的研究和应用情况。主要包括普通吸光光度法,催化光度法,共振散射法,和化学发光法,并进一步提出了建议和设想。     

Tidal stress triggering effects of earthquakes based on various tectonic regions in China and related astronomical characteristics

Dividing the mainland China into different tectonic stress regions, we calculate tidal stress components along the seismic compressive and extensional principal stress axes at every earthquake’s focus in different tectonic stress regions. Tidal stress triggering effect on every earthquake fault is analyzed. Based on this, the lunar-solar location parameters on the occurring times of earthquakes which suffered tidal triggering effects are calculated, and the distribution patterns of the lunar-solar location parameters in different tectonic stress regions are obtained. The results indicate that earthquake tidal triggering effects and related astronomical characteristics are dependent on the properties of regional tectonic stress and the geographic locations of earthquake faults. Supported by the National Natural Science Foundation of China (Grant No. 40764001)     

Chinesisch‐Deutsches Symposium ”Frontiers of Chemistry“

Die Chinesische Chemische Gesellschaft und die Gesellschaft Deutscher Chemikerorganisierten das zweite Symposium ”Frontiers of Chemistry“ vom 5. bis 11. Oktober 2008 in China.     

近46年来中国温度破纪录事件的时空分布特征分析

利用概率分布理论和中国近46年逐日最高、最低温度资料,对中国近46年来高温、低温破纪录事件频次和强度的时空分布特征进行了统计分析.结果表明：1976—2005年以来,中国实际检测年均发生高温破纪录事件频次多于理论值2.5次左右,而低温破纪录事件则少于理论值约4.5次,这与全球增暖趋势相一致.高温破纪录事件多发生于中国西北、华北、东北和青藏高原一带,低温破纪录事件则相反,在这些地方明显偏少;在温度破纪录事件年发生频次相对趋势上,中国大部地区高温破纪录事件频次有一定程度的增加而低温破纪录事件呈现普遍减少趋势; 关键词： 破纪录事件 气候变化 极端事件 中国气候     

TC2理论中tc夸克的联合产生

在TC2理论框架下,计算了在高能正负电子对撞机(LC)上,TC2动力学对味改变中性流过程e⁺e^－→tc产生截面的修正和TC2理论预言的中性top–pionπ0t对该过程产生截面的贡献.计算结果表明:TC2理论对LC实验中tc夸克联合产生的贡献主要来自中性top-pion π0t.在TC2理论的绝大部分参数空间内,可达10^－2ph.若假设LC的积分亮度为500fb^－1,则每年可产生数千个tc事例.因此,将来的LC实验可作为检验TC2理论的重要工具.     

Progress of estuarme research in China over last 50 years

It is well known that the estuarine research in China has got great achievements since the past 50 years. The development of estuarine research in China and progress in fundamental study are presented firstly in this paper. Especially in the aspect of theoretic studies, a distinctive feature is the combination studies of dynamics, sedimentology and geomorphology, which obtain a series of achievements, such as estuarine diluted water, estuarine fronts, turbidity maximum, sediment movement, formation of mouth bar, estuarine discontinuity phenomena, estuarine development, etc. Then some successful applications are introduced taking the Qiantang River Estuary and Yangtze Estuary as examples. Finally, main directions of estuarine research are discussed on fundamental study, the impacts of human activities on estuaries, estuarine material flux, sediment movement, prediction of estuarine erosion and accretion, estuarine discontinuity, artificial estuaries, land reclamation and wetland protection.     

分光光度分析

本文是本刊“分光光度分析”的定期评述的继续 ,主要是对 1 998年 6月～ 2 0 0 0年 6月年间我国在分光光度分析领域中的研究现状及进展进行了评述。文献资料主要来自国内主要杂志和全国性学术会议 ,对我国学者在国际杂志上发表的论文也给予部分收录。内容包括专著、综述、学术会议、有机试剂及多元络合物体系、动力学光度法、其它光度分析法 (固相光度法、导数光谱 ,双波长分光光度法及化学计量学光度法 )和流动注射在光度分析中的应用 (包括流动注射荧光法及化学发光法 )。引用文献 32 1篇     

稳定性同位素评价南方膳食结构中铁的吸收率

评价南方膳食结构中铁的吸收率,为我国不同人群、不同膳食类型的铁吸收率提供参考资料。采用~(57)Fe-EDTA或~(57)FeSO4两种铁的稳定性同位素示踪方法,以稀土元素Dy作为排泄物的回收标记物,于现场进行人体代谢试验,受试者为健康成年男子和孕龄妇女各10名,分6次口服3.0mg的~(57)Fe稳定性同位素示踪剂及2.0mg的Dy,粪便监测法收集同位素排出粪样;用电感耦合等离子体质谱仪测定粪样~(57)Fe/~(56)Fe的比值,用原子吸收光谱法测定粪样总Fe,从而计算该人群膳食铁的吸收率。在南方膳食结构中,口服~(57)Fe-EDTA示踪剂,成年男子膳食铁的吸收率为7.34%,孕龄妇女的吸收率为6.92%;口服~(57)Fe-SO4示踪剂,成年男子膳食铁的吸收率为6.01%,孕龄妇女的吸收率为5.40%。本研究结果表明口服~(57)Fe-EDTA评价膳食铁吸收率虽有高于用~(57)FeSO4评价结果的趋势,但无显著性统计分析差异。中国南方城市膳食中铁的吸收率与2000年中国营养学会对我国居民膳食铁吸收率的估计水平大致相当。     

Alkyl-chain branched effect on the aggregation and photophysical behavior of polydiarylfluorenes toward stable deep-blue electroluminescence and efficient amplified spontaneous emission

The control of the condensed superstructure of light-emitting conjugated polymers(LCPs) is a crucial factor to obtain high performance and stable organic optoelectronic devices.Side-chain engineering strategy is an effective platform to tune inter chain aggregation and photophysical behaviour of LCPs.Herein,we systematically investigated the alkyl-chain branched effecton the conformational transition and photophysical behaviour of polydiarylfluorenes toward efficient blue optoelectronic devices.The branched side chain will improve materials solubility to inhibit interchain aggregation in solution according to DLS and optical analysis,which is useful to obtain high quality film.Therefore,our branched PEODPF,POYDPF pristine film present high luminance efficiency of 36.1% and 39.6%,enhanced about 20%relative to that of PODPF.Compared to the liner-type sides' chain,these branched chains also suppress chain planarization and improve film morphological stability effectively.Interestingly,the branched polymer also had excellent stable amplified spontaneous emission(ASE) behaviour with low threshold(4.72 μJ/cm~2) and a center peak of 465 nm,even thermal annealing at 220 C in the air atmosphere.Therefore,side-chain branched strategy for LCPs is an effective means to control interchain aggregation,film morphology and photophysical property of LCPs.     

Stimuli-responsive fluorescent supramolecular polymer network based on a monofunctionalized leaning tower[6]arene

A fluorescent supramolecular polymer network with an excellent triple-stimuli responsive property based on metal–ligand coordination and host–guest interactions has been constructed from a terpyridine-monofunctionalized leaning tower[6]arene, a tetraphenylethylene AIEgen, and a bridging coordination ion (Zn²⁺). Addition of competitive binding agents, trifluoroacetic acid, and/or pillar[5]arene can break the metal coordination and/or host-guest inclusion complexation, and thermal heating can weaken the non-covalent interactions in the supramolecular polymer gel, all leading to the gel-to-sol transition.