Seedling Growth and the Environmental Factors of the Non-native Mangrove Species, Sonneratia caseolaris, in Shenzhen Bay

选取深圳湾红树林的林缘、林窗及郁闭海桑Sonneratia caseolaris林和秋茄Kandelia obovata林等4种环境下自然生长的海桑幼苗，测其生物量、光合特性等指标。结果表明，林缘海桑幼苗生物量累积最大，叶片生物量所占比重最高，幼苗通过提高叶片面积和叶片数量，增加光合速率、水分利用率和光合氮利用率而加速生长。综合分析4种环境的环境因子发现，光照强度是决定幼苗速生并占领生态位的关键生态因子。该结果为研究深圳湾外来种海桑的危害及其防控和管理措施提供参考。This study aimed to discover the growth, photosynthetic traits of Sonneratia caseolaris seedlings to different environment in natural mangroves, which were four kinds of plots under dense canopy of Kandelia obovata forests and S. caseolaris forests, forest gaps, and mudflats. The results showed that the seedlings growing in mudflats had the largest total biomass and leaf biomass partitioning, attributing to their high photosynthetic rates, water use efficiency and photosynthetic nitrogen use efficiency. Light intensity was the key factor among the all environmental factors that contributing to the fast growing of S. caseolaris seedlings, which led to its competition for new habitats. The results provided a reference for the management of non-native species, and the control of its invasive potential in Shenzhen Bay.国家自然科学基金（31270581

An Entrant of Smaller Fullerene: C-56 Captured by Chlorines and Aligned in Linear Chains

A smaller fullerene C-56 (#913) is stabilized, isolated, and crystallographically characterized as C56Cl10. The geometric parameters of C56Cl10 imply the otherwise unstable cage of C-56 can be stabilized by chlorination through releasing its surface strains and maintaining fragmental aromaticity. An unexpected C Cl center dot center dot center dot Cl C short contact, as well as the linear alignment with pearl - necklace-shaped, is revealed in C56Cl10 crystal.NSFC,20525103,20531050,20721001,20425312, 20423002 973 Program,2007C13815301

Bi and Eu-codoped Y_2O_3 Phosphor Prepared by Microwave Hydrothermal Processing and Its Luminescent Properties

[中文文摘]用微波水热法制备化学计量比为(Y0.94-x,Eu0.06,Bix)2O3(x=0,0.01～0.06)的铋铕共掺杂氧化钇磷光粉。用XRD、SEM、EDS、荧光光谱及HRTEM等进行表征。结果表明:该系统由于铋的加入使(211)晶面的生长受到抑制;在激发波长346 nm时,由于铋的掺入使发光增强;随铋掺杂量的增加,其发光先增强后减弱,并在x=0.03时有最大值;因此该系统可作为320～375 nm的近紫外(如白光LED及高压汞灯)激发用磷光粉。该系统在激发波长为254 nm时,铋的加入使发光强度减弱;因此该系统不适合用于低压汞灯。[英文文摘](Y0.94-x,Eu0.06,Bix)2O3(x = 0,0.01~0.06) phosphor powders were prepared by microwave hydrothermal processing.The powders were characterized by XRD,SEM,EDS,photoluminescence and HRTEM.The growth of the crystal face(211) was restrained,resulting from Bi doping probably.The intensity of the emission spectra was generally enhanced when excited with 346 nm owing to Bi doping.It was raised first and then declined later on,and achieved a maximum when x=0.03,indicating that the phosphor powders can serve in near-UV band of 320~375 nm excitation,for example,forwhite LED and high pressure mercury discharge lamps.The intensity of the emission spectra was generally weakened when excited with 254nm due to Bi doping,suggesting that the phosphor powders as mentioned are not suitable for the low-pressure mercury discharge lamps.福建省重大专项基金(2005HZ02-2)资助项