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| 1 | Effects of soil water and nitrogen availability on photosynthesis and water use efficiency of Robinia pseudoacacia seedlings显示文摘The efficient use of water and nitrogen (N) to promote growth and increase yield of fruit trees and crops is well studied.However,little is known about their effects on woody plants growing in arid and semiarid areas with limited water and N availability.To examine the effects of water and N supply on early growth and water use efficiency (WUE) of trees on dry soils,one-year-old seedlings of Robinia pseudoacacia were exposed to three soil water contents (non-limiting,medium drought,and severe drought) as well as to low and high N levels,for four months.Photosynthetic parameters,leaf instantaneous WUE (WUEi) and whole tree WUE (WUEb) were determined.Results showed that,independent of N levels,increasing soil water content enhanced the tree transpiration rate (Tr),stomatal conductance (Gs),intercellular CO2 concentration (Ci),maximum net assimilation rate (Amax),apparent quantum yield (AQY),the range of photosynthetically active radiation (PAR) due to both reduced light compensation point and enhanced light saturation point,and dark respiration rate (Rd),resulting in a higher net photosynthetic rate (Pn) and a significantly increased whole tree biomass.Consequently,WUEi and WUEb were reduced at low N,whereas WUE i was enhanced at high N levels.Irrespective of soil water availability,N supply enhanced Pn in association with an increase of Gs and Ci and a decrease of the stomatal limitation value (Ls),while Tr remained unchanged.Biomass and WUEi increased under non-limiting water conditions and medium drought,as well as WUEb under all water conditions;but under severe drought,WUEi and biomass were not affected by N application.In conclusion,increasing soil water availability improves photosynthetic capacity and biomass accumulation under low and high N levels,but its effects on WUE vary with soil N levels.N supply increased Pn and WUE,but under severe drought,N supply did not enhance WUEi and biomass. | Xiping Liu Yangyang Fan Junxia Long Ruifeng Wei Roger Kjelgren Chunmei Gong Jun Zhao | 2013 | Journal of Environmental Sciences2013，25，3： | 15 |
| 2 | Internal Structure of Cambrian Fossil Embryo Markuelia Revealed in the Light of Synchrotron Radiation X-ray Tomographic Microscopy显示文摘根据同步加速器放射 X 光检查 Tomographic 显微镜学(SRXTM ) , Markuelia hunanensis 的内部结构被揭示。在一个例子,玻璃化和脱皮的表演在卵壳下面隐藏的 annuli。Sectioning 和 3-D 重建从转换内向的人显示一条未经触动的消化的道到终端肛门。转换内向的人形成橄榄球 cavum。下列消化的道是像绳的卷,平行到身体轴,在长度的大约 650 m,和在直径(80 m ) 的制服。精致地保存的像管子的结构在像绳的结构的中间被隐藏,直径 2040 m,与一段 120 m。我们作为肌的可能的残余作为内脏和它的环境的可能的外皮解释这像管子的结构,类似于那在 Priapulans。连接身体墙和消化的道的二对称的杆形状结构作为可能的缩肌肌肉被解释。在比较左形式的保存的井和 Markuelia 的正确形式的身体以后,我们建议他们可以代表同种二形。直接数了, Markuelia hunanensis 的一件样品拥有 62 个环和其它 68。 | CHENG Gong PENG Fan DUAN Baichuan DONG Xiping | 2011 | Acta Geologica Sinica(English Edition)2011，85，1： | 4 |
| 3 | Evaluation of transgenic tobacco expressing two insecticidal genes to delay resistance development of Helicoverpa armigera显示文摘The resistance ratio of Helicoverpa armigera to Cry1Ac insecticidal protein from Bacillus thuringiensis (Bt) is 13.1- and 3.02-fold after 18 generations of selection by transgenic tobacco expressing Bt or two (Bt and CpTI) insecticidal protein genes, in which the average corrected mortality for each selection treatments is about 60% . The mortality of selected population by transgenic Bt gene tobacco is significantly lower than the control strain when fed | Jianzhou Zhao Yunliu Fan Xianlin Fan Xiping Shi Meiguang Lu | 1999 | Chinese Science Bulletin1999，44，20： | 3 |
| 4 | Contamination, chemical speciation and vertical distribution of heavy metals in soils of an old and large industrial zone in Northeast China显示文摘 | Fayun Li Zhiping Fan Pengfei Xiao Kokyo Oh Xiping Ma Wei Hou | 2009 | Environmental Geology2009，，8： | 2 |
| 5 | Compatibility study of 1,3,3-trinitroazetidinewith some energetic components and inert materials 显示文摘 | LI Jizhen FAN Xuezhong FAN Xiping | 2006 | J Therm Anal Calorim2006，85，3： | 1 |
| 6 | Contamination, chemical speciation and vertical distribution of heavy metals in soils of an old and large industrial zone in Northeast China显示文摘 | Fayun Li Zhiping Fan Pengfei Xiao Kokyo Oh Xiping Ma Wei Hou | 2009 | Environmental Geology2009，，8： | 1 |
| 7 | Benzothiophene and benzosulfone fused pyrazino[2,3-g]quinoxaline:Synthesis and semiconducting properties显示文摘A novel air-stable n-type benzothiaphene endcapped azaarene(BTPQ) and its sulfonated derivative(BSPQ) were prepared via two pathways and characterized by NMR, UV–vis, fluorescence and cyclic voltammetry spectroscopy. Symmetrically introducing four nitrogen atoms into acenes, the semiconductor properties could be changed from p-type to n-type detected through the space charge limited current(SCLC) method. After sulfonation of BTPQ, BSPQ is with deeper frontier orbital energy levels and enhanced the electron mobility. | Fangwei Ding Debin Xia Xiping Ding Ruibin Deng Congwu Ge Yulin Yang Ruiqing Fan Kaifeng Lin Xike Gao | 2023 | Chinese Chemical Letters2023，34，2： | 0 |
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