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17篇 您的检索式:作者名="Xiping ZHAO"
    题名 作者 年代 出处 被引量
1Effects 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 2013Journal of Environmental Sciences2013,25,3:15
2Duration of hypertension is associated with cognitive function: a cross-sectional study in Chinese adults显示文摘Li Tuo Bai Yu Xiang Junwu Wang Rui Bai Jie Tuo Xiping Zhao Zhongxin 2014Chinese Medical Journal2014,,11:5
3Fluorescence spectroscopic studies of the effect of granular activated carbon adsorption on structural properties of dissolved organic matter fractions显示文摘这个工作在第二等的自河在溶解有机物( DOM )的荧光特征上调查了小粒的激活的碳吸附( GACA )的效果,借助于刺激排放矩阵( EEM )系列,荧光地区性的集成(星期五)方法,同步系列,在刺激在 500 nm 在波长 450 nm 定义为荧光排放紧张的比率到那的荧光索引(<潜水艇class=“ a-plus-plus ”>前)=通信的 370 nm ,和波长 t 在从北方废水处理工厂的第二等的自河的 DOM (沈阳,中国) 是用进 5 部分的 XAD 树脂的 fractionated:恐水病的酸(HPO -- 一) ,恐水病中立(HPO-N ) , transphilic 酸(TPI -- 一) , transphilic 中立(TPI-N ) 并且吸水的部分(HPI ) 。结果显示出那荧光灯在 HPO-N 和 TPI-N 的材料被 GACA 不太乐意地在另外的部分比那些移开。相对内容荧光灯在 HPO 的材料 -- 一, TPI -- 而那作为 GACA 的后果在 HPO-N 和 TPI-N 增加了, A 和 HPI 减少了。在所有 DOM 部分的多不的 aromatics 被 GACA 优先地吸收,与表示为文档的体积 DOM 比较。在另一方面,芳香的氨基酸的吸附和由 GACA 在同步系列展出荧光山峰的腐殖的像酸的 fluorophores 似乎依赖于 DOM 部分的酸 / 中立性质。所有五部分减少了由于 GACA 的荧光索引。GACA 导致了一减少 < 潜水艇 class= “ a-plus-plus ” > 为 HPO 的 0.5 价值 -- 一,增加 < 潜水艇 class= “ a-plus-plus ” > 为 HPO-N 的 0.5 价值, TPI -- A 和 HPI,并且一一致 < 潜水艇 class= “ a-plus-plus ” > 为 TPI-N 的 0.5 价值。Shuang XUE Qingliang ZHAO Liangliang WEI Xiujuan HUI Xiping MA Yingzi LIN 2012Frontiers of Environmental Science & Engineering2012,6,6:5
4Synthesis and light-emitting properties of 2-(N-phenyl-α-naphthylamino) and 2-dimesitylboron-7-(N-phenyl-α-naphthylamino)-9,9-diethylfluorene显示文摘A fluorescent organic triarylamine with a symmetric structure, 2,7-bis(N-α-naphthyl-phenylamino)-9,9- diethylfluorene (NPAEF) was synthesized using two methods, modified Ullmann coupling and modified palladium-catalyzed amination. An activated copper and a combination of Pd(OAc)2/P(t-Bu)3 and Pd(dba)2/P(t-Bu)3 were selected as catalysts to improve yields of reactions. These synthetic procedures were also successfully applied to an asymmetric 2-dimesitylboron-7-(N-phenyl-α-naphthylamino)-9,9-diethylfluorene (BNPEF). Photoluminescent emission peaks in solid film and in diluted solution of NPAEF were both observed at 461 nm, while the main emission peaks of BNPEF appeared at 422 nm in hexane, and at 480 nm in methanol. The double emission peaks of BNPEF in hexane reflected fine structure in the vibrational state. With an increasing polarity of solvent, the main PL emission peaks were red-shifted and vibrational fine structure disappeared. Additionally, energy levels of NPAEF were investigated and an electroluminescence (EL) device of ITO/PVK:NPAEF/Al was fabricated, which showed a turn-on voltage of 9 V and peaked at 462 nm. The EL spectrum was in good agreement with PL spectrum, which indicated that they were from the same emitting center in the device.ZHANG WenGuan HE ZhiQun HUI GuanBao MU LinPing WANG YongSheng ZHAO ShengMin JING XiPing 2009Science China Chemistry2009,52,7:3
5Evaluation 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 fedJianzhou Zhao Yunliu Fan Xianlin Fan Xiping Shi Meiguang Lu 1999Chinese Science Bulletin1999,44,20:3
6A survey of HIV infection and related high-risk factors among men who have sex with men in Suzhou,Jiangsu,China显示文摘A cross-sectional study using the snowball sampling method was conducted in May 2008 to investigate human immunodeficiency virus (HIV) infection status and related high risk factors among men who have sex with men (MSM) in Suzhou city of Jiangsu province. The researchers carried out a face-to-face questionnaire interview among MSM, and collected their blood samples to test for HIV and other sexually transmitted diseases (STDs). Among the 280 respondents, 91.1% had homosexual acts in the past 6 months and 87.5% had multiple homosexual partners; 46.4% had heterosexual sex in the past 6 months and 33.1% had multiple heterosexual partners. The rate of continued condom use was 44.3% in homosexual sex in the past 6 months, while the rate in heterosexual sex was 33.9%. Laboratory test results showed that the prevalences of HIV and syphilis were 7.1% (20/280) and 15.0% (42/280), respectively, but no HCV-positive person was found. In the multivariate logistic regression model, subjects with a monthly income of more than RMB $ 1,000 (OR=4.83,95% CI=1.44-16.22), subjects who often went to bars for sexual partners (OR=2.25, 95%CI=1.21-4.20), and subjects who had more than one sexual partner in the past 6 months (OR=0.49, 95%CI=0.25-0.97) and had sex with fixed sexual partners in the past 6 months (OR=0.42, 95%CI=0.25-0.75) were significantly associated with the rate of continued condom use in homosexual sex in the past 6 months. Unprotected sex and multiple sexual partners were more common among MSM in Suzhou city; furthermore, the prevalences of HIV infection and syphilis were relatively high. HIV preventive measures should be designed to address these risk factors and control the spread of HIV among MSM.Hongling Bai Xiping Huan Weiming Tang Xin Chen Hongjing Yan Xiaoyan Liu Haitao Yang Zhihang Peng Xiuping Zhao Rongbin Yu Hao Yu Feng Chen 2011The Journal of Biomedical Research2011,25,1:2
7Optimal design of heating channels for rapid heating cycle injection mold based on response surface and genetic algorithm 显示文摘Li XiPing Zhao GuoQun Guan YanJin 2009Materials and Design2009,30,:1
8Long-Chain Peer Referral of Men Who Have Sex With Men: A Novel Approach to Establish and Maintain a Cohort to Measure HIV Incidence, Nanjing, China显示文摘Hongjing Yan Haitao Yang Jinkou Zhao Chongyi Wei Jianjun Li Xiping Huan Min Zhang H. Fisher Raymond Willi McFarland 2012JAIDS Journal of Acquired Immune Deficiency Syndromes2012,,2:1
9Nanosized titania and zirconia as catalysts for hydrolysis of carbon disulfide显示文摘Yinghong Yue Xiping Zhao Weiming Hua 2003Appl Catal B2003,46,3:1
10Histological observation of some primitive euconodonts of Late Cambrian from Liaoning显示文摘The histology of some euconodonts of Late Cambrian from Benxi and Fuxian County, Liaoning Province is studied by the oil-immersion technique. The histological characteristics of six primitive species of euconodonts - Proconodontus muelleri, Proconodontus tenuiserratus, Granatodontus ani, Rotundoconus tricarinatus, Teridontus nakamurai and Cordylodus proavus are describedin detail. Tubular dentine and atubular (parallel- and wavy-lamellar) dentine are found in the basal bodies of the primitive euconodonts Proconodontus tenuiserratus and Proconodontus muelleri, respectively. The tubular dentine and spherulitic dentine are also recognized from the basal bodies of Granatodontus ani and Rotundoconus tricarinatus. Since the histological characteristics of the studied six species of euconodonts belonging to Proconodontus lineage and Teridontus lineage Sensu Miller (Univ Kansas Paleontol Contr, 1980, 99: 1-39)seems to be almost the same, euconodonts are proposed as possibly monophyletic herein.GUO Wei DONG Xiping ZENG Xiaochun ZHAO Le 2005Progress in Natural Science:Materials International2005,15,12:1
11Novel phosphors of Eu^3+ ; Tb^3+ or Bi^3+ activated Gd2GeO5显示文摘Guo Peimin Zhao Fei Li Guobao Liao Fuhui Tian Shujian Jing Xiping 2003Journal of Luminescence2003,66,:1
12Optimal design of heating channels fiJr rapid heating cycle injection mold based on response surface and genetic algorithm 显示文摘LI Xiping ZHAO ( uoqun GUAN Yanjin 2009Materials and Design2009,30,:1
13A new strategy for fabrication of unique heterostructured titanium laminates and visually tracking their synchronous evolution of strain partitions versus microstructure显示文摘Heterostructured(HS)material with extraordinary mechanical properties has been regarded as one of the most promising structural materials.Here,we reported a new strategy for preparing heterostructured pure titanium laminates that possess a good combination of strength and ductility by combining gradient structure(GS)and heterogeneous lamella structure(HLS).The deformation characteristic versus microstructure evolution of GS/HLS titanium laminates,namely the strain partitions between different-sized grains(480–25μm)was visualized using a scanning electron microscope(SEM)equipped with electron backscattered diffraction(EBSD)mode combined with the digital image correlation(SEM-DIC)with an ultrahigh spatial resolution for the first time.As a result,the hetero-deformation of unique GS/HLS structure by the characteristic of strain partitions could be accurately captured.While the hetero-deformation could result in the hetero-deformation induced(HDI)stress strengthening and HDI hardening,which were regarded as the key reason that the resulting GS/HLS Ti laminates showed a superior combination of strength and ductility.This could promote a more in-depth understanding of the strengtheningtoughening mechanism of heterostructured material.Hao Ding Xiping Cui Zhiqi Wang Tao Zhao Yuchen Wang Yuanyuan Zhang Hongtao Chen Lujun Huang Lin Geng Junfeng Chen 2022Journal of Materials Science & Technology2022,,12:1
14Optimal Design of Heating Channels for Rapid Heating Cycle Injection Mold Based on Response Surface and Genetic Algorithm显示文摘Li Xiping Zhao Guoqun Guan Yanjin 2009Materials and Design2009,,30:1
15Breeding of New Processing Apricot Cultivar ‘Jinxiu'显示文摘‘Jinxiu' is a processing apricot(Armeniaca vulgaris L.) cultivar derived from the cross of ‘Chuanzhihong'בJintaiyang'.The fruit is oval-shaped with the ground color of orange and 1/4-1/2 sheet red in the surface. The average fruit weight is65.5 g, and the maximum value is 106 g. The flesh is orange, fine with very less fiber, toughness, less juice and freestone, and tastes sour and sweet. The soluble solid content is 12.5%. The edible rate is 95.8%. The fruit skin hardness is 12.9 kg/cm2 and storable. The preserved apricots have orange color and are tasty. The preserved yield is 40%. The fruit development period is 72 d. The fruit has high yield, and the fruit yield in full fruit period can reach 37 000 kg/hm2. ‘Jinxiu' was examined and approved by Hebei Examination and Approval Committee of Forest Tree Variety in 2013.Xiaohong WU Xiping ZHAO Huanying TANG Xiancheng ZHANG Jingtao WANG Wenhui MA Liyong YUAN 2017Agricultural Science & Technology2017,18,11:0
16对具有电子枪装置的试验方法和特殊要求(英文)显示文摘Name of Project:IEC 60519-7:2008 Security of Electric Heating Devices,Part 7:Special Requirements for Device with Electric Gun;IEC 60703:2008 Test Methods of Devices with Electric Gun Main Participant Units:MCC-Xi'an Electric Furnace Institute Co.,Ltd.,Xi'an Jiaotong University,Northwest Institute for Non-ferrous Metal Research,Machinery Industry Beijing Electro-technical and Economic Research Institute Main Contributors:Zhao Yuqing,Liu Xiping,Han Liang,Zhao Weiping,Zhang Yingming,Zeng Yanhong,Wang Yanwu,Zhao Yuqing Xi’an Jiaotong University Liu Xiping General National Industrial Electric Heating Equipment Standardization Technique Committee Xi’an Electric Furnace Institute Co, Ltd. Han Liang Xi’an University Xi’an Jiaotong University 2011China Standardization2011,56,3:0
17Screening of indicator pharmaceuticals and personal care products in landfill leachates: a case study in Shanghai, China显示文摘Identifying potential sources of pharmaceuticals and personal care products(PPCPs)in the environment is critical for the effective control of PPCP contamination.Landfill leachate is an important source of PPCPs in water;however,it has barely been involved in source apportionment due to the lack of indicator-PPCPs(i-PPCPs)in landfill leachates.This study provides the first systematic framework for identifying i-PPCPs for landfill leachates based on the wide-scope target monitoring of PPCPs.The number of target PPCPs increased from<20 in previous studies to 68 in the present study.Fifty-nine PPCPs were detected,with median concentrations in leachate samples ranging from below the method quantification limit(MQL)to 41μg/L,and 19 of them were rarely reported previously.A total of 29 target compounds were determined to be PPCPs of high concern by principal component analysis according to multiple criteria,including occurrence,exposure potential,and ecological effect.Coupled with source-specificity and representativeness analysis,erythromycin,gemfibrozil,and albendazole showed a significant difference in their occurrence in leachate compared to other potential sources(untreated and treated municipal wastewater and livestock wastewater)and correlated with total PPCP concentrations;these were recommended as i-PPCPs for leachates.Indicator screening procedure can be used to develop a sophisticated source apportionment method to identify sources of PPCPs from adjacent landfills.Xiping Kan Xia Yu Wentao Zhao Shuguang Lyu Shuying Sun Gang Yu Qian Sui 2023Frontiers of Environmental Science & Engineering2023,17,9:0
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