Fluorescence sensing of Cu and Hg by a dipyrene ligand involving an excimer-switch off mechanism

A novel dipyrene ligand 1 has been designed which shows intramolecular excimer formation in solution. Its specific interaction with Cu²⁺ or Hg²⁺ leads to the disruption of the excimer and results in a fluorescence-mediated sensing of these ions in a mixed organic-aqueous solution. Apart from steady-state studies, time-resolved fluorescence measurements also reveal that excimer-switch off caused by metal ion coordination leads to the selective detection of these ions.     

北京城内庙中寿星──法源寺

法源寺始建于唐朝贞观年间，至今已有１３００多年的历史，是北京城内最古老的寺庙。该寺建筑规模宏大、壮观，是历朝帝王亲自临幸斋僧建道的主要寺庙，因此在历史长河中法源寺的命运与中国命运息息相关。法源寺不仅文物荟萃，而且花木繁多名贵，历代名家多咏诗赞叹。解放后党和国家倍加关怀，多次修茸，已经对外开放，是人们游览之地，也是研究中国佛学的学府。     

晋东南村庙建筑形态分析

探讨了村庙的存在意义,分析了晋东南村庙的社会形态、空间形态和构造形态。     

新农村建设背景下祠堂文化功能的演变

论述了古祠堂的文化及功能,并进一步研究了在社会主义新农村建设大背景的下祠堂文化功能,探讨了祠堂的社会教化意义,指出祠堂文化演进及其功能与"经济、政治、文化、社会"相通,有提高人之精神、兴发人之志气、开辟人之智慧之源的影响力。     

关于刘节斋逐利玛窦出肇庆的动机——刘承范《利玛窦传》读后(二)

关于两广总督刘节斋驱逐利玛窦出肇庆的原因,利玛窦本人先后列举了三点:其一,刘节斋欲占据僊花寺而建立自己的生祠;其二,刘节斋顾忌外国人在肇庆,担心他们刺探军情,从而不利于国家安全;其三,刘节斋为获取黄白术秘密而迫使利玛窦移居它处。根据刘承范《利玛窦传》,刘明强和黎玉琴否认第一点而肯定第二点,也与其他学者一样忽视了第三点。由于刘节斋迷信黄白术而利玛窦享有黄白术盛名,刘节斋更可能是为获取黄白术秘密而将利玛窦逐出肇庆,但目的地不是澳门而是韶州。     

Composition dependent structural and optical properties of Sm-doped sodium borate and sodium fluoroborate glasses

Sodium borate and fluoroborate glasses doped with trivalent samarium (Sm³⁺) were prepared and their detailed spectroscopic analysis was carried out. The FTIR spectra reveal that, the glasses contain BO₃, BO₄, non-bridging oxygen and strong OH⁻ bonds. From the optical absorption spectra, Judd-Ofelt intensity parameters (Ω_λ, λ=2, 4 and 6) have been evaluated and are in turn used to predict radiative properties such as radiative transition probability (A), stimulated emission cross section () and branching ratios (β_R) for the excited levels of Sm³⁺ ions in sodium borate and sodium fluoroborate glasses. The dependence of the spectral characteristics of Sm³⁺ ions due to compositional changes have been examined and reported. The value is found to decrease with the decrease in the sodium content in the glass. The decay from the ⁴G_5/2 level is found to be non-exponential indicating a cross-relaxation among the Sm³⁺ ions.     

论庙际网络、社会资本与两岸关系———以泉州天后宫为例

改革开放后泉州天后宫与闽台妈祖庙以及其他宫庙之间构建起密切的关系网络。通过获取蕴藏于庙际网络中的社会资本,泉州天后宫进一步巩固了它在闽台妈祖信仰圈中的中心位置。由于庙际网络是通过信众间的往来构建起来的,庙际网络在给宫庙带来社会资本回报的同时,也很自然地惠及两岸信众,由此促进两岸关系的发展。     

Helium implanted CuHf as studied by TDPAC and positron lifetime measurements

¹⁸¹Ta time differential perturbed angular correlation (TDPAC) and positron lifetime measurements were carried out on homogeneously α-implanted CuHf samples. TDPAC measurements indicate the trapping of vacancy clusters and helium associated defect complexes by Hf atoms. The presence of helium-vacancy complexes and helium stabilised voids has been identified by positron lifetime measurements. Further the nucleation and growth stages of helium bubbles have been identified. TDPAC and positron lifetime measurements indicate that Hf atoms act as heterogeneous nucleating centers for helium bubbles. Hf atoms are found to suppress the bubble growth in CuHf as indicated by the results of positron lifetime measurements.     

永顺县老司城祖师殿建筑群沿革初探

永顺县老司城遗址现存的一组明清时期的建筑群,由祖师殿、皇经台和玉皇阁3座建筑组成.关于该建筑群的历史沿革,存在着来自考古学、历史学界及民间学者的多种不同说法.对这些相关论述进行了梳理,并结合东南大学建筑研究所对宁波市保国寺大殿所做的基于勘测分析的复原研究,认为有必要对该建筑群进行基于样式形制和构造做法的建筑学意义上的考证,以此确定其年代和历史沿革,归纳出该建筑群在大木技术方面的地域特色和技术源流.     

略论魏晋南北朝佛教寺院的公益活动

魏晋南北朝时期的慈善公益事业,因受佛教慈悲观念和＂福田＂思想的影响,佛教寺院和僧人在社会上进行了广泛的慈善公益活动,他们参加到世俗的社会生活当中,赈灾济贫、行医施药、凿井修桥、保护生态环境,为当时的社会公益事业做出了独特的贡献,对保持社会稳定、促进经济和文化的发展产生了积极的影响。