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在腐植酸上二氧化氮光敏还原制备亚硝酸
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作者 Konrad Stemmler markus ammann +3 位作者 Chantal Donders Jrg Kleffmann Christian George 郑佩珠 《腐植酸》 2013年第3期26-30,共5页
研究结果表明,土壤和其他含有腐植酸的表面,具有一种能产生还原表面物质的有机表面光化学,而这种还原表面物质可以选择性地与二氧化氮反应。亚硝酸形成的表观速率可以解释最近观察到的白天在边界层中亚硝酸高浓度现象,亚硝酸的光分解占... 研究结果表明,土壤和其他含有腐植酸的表面,具有一种能产生还原表面物质的有机表面光化学,而这种还原表面物质可以选择性地与二氧化氮反应。亚硝酸形成的表观速率可以解释最近观察到的白天在边界层中亚硝酸高浓度现象,亚硝酸的光分解占整个羟基自由基源的60%。我们认为这种在腐植酸上的光诱导亚硝酸产物对最低对流层的化学过程有潜在的重要影响。 展开更多
关键词 亚硝酸 二氧化氮 腐植酸 还原 光化学
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The 3-60 criteria challenge established predictors of postoperative mortality and enable timely therapeutic intervention after liver resection
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作者 Georg P.Gyoeri David Pereyra +11 位作者 Eva Braunwarth markus ammann Philipp Jonas Florian Offensperger Florian Klinglmueller Ruth Baumgartner Sandra Holzer Michael Gnant Friedrich Laengle Stefan Staettner Thomas Gruenberger Patrick Starlinger 《Hepatobiliary Surgery and Nutrition》 SCIE 2019年第2期111-124,共14页
Background:To date,definitions of liver dysfunction(LD)after hepatic resection rely on late postoperative time points.Further,the used parameters are markedly influenced by perioperative management.Thus,we aimed to es... Background:To date,definitions of liver dysfunction(LD)after hepatic resection rely on late postoperative time points.Further,the used parameters are markedly influenced by perioperative management.Thus,we aimed to establish a very early postoperative score to predict postoperative mortality.Methods:Liver related parameters were evaluated after liver resection in a retrospective evaluation cohort of 228 colorectal cancer patients with liver metastasis(mCRC)and subsequent validation in a prospective set of 482 consecutive patients from 4 independent institutions undergoing hepatic resection was performed.Results:C-reactive protein(CRP,AUC=0.739,P<0.001)and antithrombinⅢ-activity(ATⅢ,AUC=0.844,P<0.001)on the first postoperative day(POD)were found to be elevated in patients with LD.Cut-off values for CRP at 3 mg/dL and for ATⅢat 60%significantly identified high-risk patients for postoperative LD and mortality(P<0.001)and thus defined the 3-60 criteria on POD1.The 3-60 criteria showed superior sensitivity and specificity compared to established criteria for LD[3-60 criteria:total positive patients:26 patients(70%mortality detected),odds ratio(OR):48.8;International Study Group for Liver Surgery:total positive patients:43(70%mortality detected),OR:23.3;Peak7:total positive patients:9(30%mortality detected),OR:27.8;50-50:total positive patients:9(30%mortality detected),OR:27.8].These results could be validated in a multi-center analysis and ultimately the 3-60 criteria remained an independent predictor of postoperative mortality upon multivariable analysis.Conclusions:The 3-60 criteria on POD1 predict postoperative LD and mortality early after liver resection with a comparable or better accuracy than established criteria,allowing for immediate identification of high-risk patients. 展开更多
关键词 LIVER surgery LIVER dysfunction(LD) MORTALITY C-reactive protein(CRP) AntithrombinⅢ-activity(ATⅢ)
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