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| 1 | Assessment of an Evapotranspiration Deficit Drought Index in Relation to Impacts on Ecosystems显示文摘Ecosystems have increasingly been subject to the challenge of heavy drought under global warming. To quantitatively evaluate the impacts of drought on ecosystems, it is necessary to develop a drought index that can sensitively depict the response of vegetation to drought evolution at a biological time scale. For the ability of direct connection between climate and ecosystem by deficit of evapotranspiration, in the present study, a drought index was defined based on standardized evapotranspiration deficit (SEDI), according to the difference between actual and potential evapotranspiration, to meet the need for highlighting drought impacts on ecological processes. Comparisons with traditional indices show that SEDI can reasonably detect droughts and climatic dry and wet transitions, especially at a monthly time scale, and can also regenerate long-term trends. Moreover, SEDI can more sensitively capture the biological changes of ecosystems in response to the dynamics of drought intensity, compared with the indices of precipitation and temperature. SEDI is more practical than the precipitation and temperature indices to highlight signals of biological effects in climate droughts. Hence, it has potential for use in assessments of climate change and its impact on ecosystems. | Xia ZHANG Mingxing LI Zhuguo MA Qing YANG Meixia LV Robin Clark | 2019 | Advances in Atmospheric Sciences2019，36，11： | 6 |
| 2 | Application of in vivo and ex vivo magnetic resonance imaging for evaluation of tranilast on neointima formation following balloon angioplasty of the rat carotid artery显示文摘 | Ohlstein EH Romanic AM Clark LV | 2000 | Cardiovasc Res2000，47，： | 1 |
| 3 | Life as a nurse researcher 显示文摘 | ~ Lv Clarke PN Fawcett J | 2014 | Nursing Science Quarterly2014，27，1： | 1 |
| 4 | Application of serial in vivo magnetic resonance imaging to evaluate the efficacy of endothelin receptor antagonist SB217242 in the rat carotid artery model of neointima formation显示文摘 | Chandra S Clark LV Coatney RW | 1998 | Circulation1998，97，22： | 1 |
| 5 | Application of serial in vivo magnetic resonance imaging to evaluate the efficacy of endothelin receptor antagonist SB217242 in the rat carotid artery model of neointima formation 显示文摘 | Chandra S Clark LV Coatney RW | 1998 | Circulation1998，97，22： | 1 |
| 6 | Application of serial in vivo magnetic resonance imaging to evaluate the efficacy of endothelin receptor antagonist SB217242 in the rat carotid artery model of neointima formation显示文摘 | Clark LV Coatney RW | 1998 | Circulation1998，97，22： | 1 |
| 7 | Effect of bacterial endotoxin on the respiratory function of liver mitochondria显示文摘 | Natanzon LV Clark AJ Jackson JB | 1997 | Ukr Biokhim Zh1997，60，1： | 1 |
| 8 | Development,validation and comparison of multivariable risk scores for prediction of total stroke and stroke types in Chinese adults:a prospective study of 0.5 million adults显示文摘Background and purpose Low-income and middle-income countries have the greatest stroke burden,yet remain understudied.This study compared the utility of Framingham versus novel risk scores for prediction of total stroke and stroke types in Chinese adults.Methods China Kadoorie Biobank(CKB)is a prospective study of 512726 adults,aged 30-79 years,recruited from 10 areas in China in 2004-2008.By 1 January 2018,43234 incident first stroke cases(36310 ischaemic stroke(IS);8865 haemorrhagic stroke(HS))were recorded in 503842 participants with no history of stroke at baseline.We compared the predictive utility of the Framingham Stroke Risk Profile(FSRP)with novel CKB stroke risk scores and included recalibration,refitting,stratifying by study area and addition of other risk factors.Discrimination was assessed using area under the receiver operating characteristic curve(AUC)and calibration was assessed using Greenwood-Nam-D’Agostinoχ^(2) statistics.Results Incidence of total stroke varied fivefold by area in China.The FSRP had good discrimination for total stroke(AUC(95%CI);men:0.78(0.77 to 0.79),women:0.77(95%CI 0.76 to 0.78)),but poor calibration(χ^(2);men:1,825,women:3,053),substantially underestimating absolute risks.Recalibration reducedχ^(2) by>80%,but did not improve discrimination.Refitting the FSRP did not materially improve discrimination,but further improved calibration.Stratification by area improved discrimination(AUC;men:0.82(0.82 to 0.83);women:0.82(0.82 to 0.83)),but not calibration.Adding other risk factors yielded modest,but statistically significant,improvements in the AUCs.The findings for IS and HS were similar to those for total stroke.Conclusions The FSRP reliably differentiated Chinese adults with incident stroke,but substantially underestimated the absolute risks of stroke.Novel local risk prediction equations that took account of differences in stroke incidence within China enhanced risk prediction of total stroke and major stroke pathological types. | Matthew Chun Robert Clarke Tingting Zhu David Clifton Derrick A Bennett Yiping Chen Yu Guo Pei Pei Jun Lv Canqing Yu Ling Yang Liming Li Zhengming Chen Benjamin J Cairns 无 | 2022 | Stroke & Vascular Neurology2022，7，4： | 1 |
| 9 | Characterization of extracellular polymeric substances in the biofilms of typical bacteria by the sulfur K-edge XANES spectroscopy显示文摘A combined approach of physicochemical extraction and sulfur K-edge X-ray absorption near-edge structure(XANES) spectroscopy was applied to characterize the extracellular polymeric substances(EPS) of typical bacterial biofilms in this study. Physicochemical analysis showed variation of the contents of DNA,polysaccharide and protein in different fractions of EPS in different mediums. The sulfur K-edge XANES analysis yielded a variety of spectra.Spectral fitting of the XANES spectra utilizing a large set of model compounds showed that there was more reduced sulfur in both LB-EPS(loosely bound EPS) and TB-EPS(tightly bound EPS) of all the biofilms in LB medium than in R2 A medium. More oxidized sulfur was identified in LB-EPS than that in TB-EPS,suggesting different niches and physiological heterogeneity in the biofilms. Our results suggested that the sulfur K-edge XANES can be a useful tool to analyze the sulfur speciation in EPS of biofilms. | Huirong Lin Chengsong Ye Lu Lv Clark Renjun Zheng Shenghua Zhang Lei Zheng Yidong Zhao Xin Yu | 2014 | Journal of Environmental Sciences2014，26，8： | 1 |
| 10 | Application of serial in vivo magnetic resonance imaging to evaluate the efficacy of endothelin receptor antagonist SB217242 in the rat carotid artery model of neointima formation显示文摘 | Chandra S Clark LV Costney RW | 1998 | Circulation1998，97，22： | 1 |
| 11 | Application of in vivo and ex vivo magnetic resonance imaging for evaluation of tranilast on neointima formation following balloon angioplasty of the rat carotid artery显示文摘 | OHLSTEIN EH ROMANIC AM CLARK LV | 2000 | Cardiovasc Res2000，47，4： | 1 |
| 12 | Effect of bacterial endotoxin on the respiratory function of liver mitochoadria 显示文摘 | Natanzon LV Clark AJ Jaekam JB | 1997 | Ukr Bickhim Zh1997，60，1： | 1 |
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