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    题名 作者 年代 出处 被引量
1酸性矿山废水污染的水稻田土壤中重金属的微生物学效应显示文摘采样调查了广东大宝山地区受酸性采矿废水长期污染的亚热带水稻田的土壤理化性质 ,重金属 Cu、Pb、Zn、Cd的全量及其 DTPA浸提量 ,以及微生物生物量及其呼吸活性等指标。利用主成分和逐步回归分析了影响土壤重金属的有效性及其微生物学效应的因素。结果表明 :土壤高含硫 ,强酸性 ,有机碳、全氮较低 ,4种金属的全量普遍超标。DTPA可提取态金属含量较高 ,不仅与其全量呈显著正相关 ,而且与土壤酸度和粘粒含量正相关 ,和 Mn含量负相关。过量的金属显著降低了土壤微生物生物量 C、N、微生物商、生物量 N/全 N比 ,并抑制了微生物呼吸强度和对有机碳的矿化率 ,导致了土壤 C/N比的升高。同时 ,金属对微生物群落及生理代谢指标 ,如微生物生物量 C/N比和代谢商的影响不显著。 DTPA可提取态金属 ,特别是 DTPA- Cu是导致微生物生物量和活性指标变化的主要因素。以有机碳 (或全氮 )为基数的复合微生物指标降低了土壤性质差异造成的干扰 ,较单一指标更能准确指示微生物对金属胁迫的反应。土壤硫没有对金属有效性和微生物指标产生明显影响 。李永涛 Thierry Becquer Cécile Quantin Marc Benedetti Patric kLavelle 戴军 2004生态学报2004,24,11:31
2粤北大宝山高含硫多金属矿污染的水稻土壤污染元素的多元分析显示文摘调查了粤北大宝山高含硫多金属矿长期污染的水稻田的污染状况,用主成分分析法分析了环境变量间的关系及污染物在样点的空间分布.结果表明:长期的污灌导致了被调查水田土壤中铁矿、硫铜矿和铅锌矿酸性矿泥的沉积,引起土壤酸化和硫、铜、铅和镉的积累.上述污染元素与pH及矿质元素铁、钙之间高度相关,而与锰和铬的相关性差.李永涛 张池 刘科学 Thierry BECQUE Cécile QUANTIN Marc BENEDETTI Patrick LAVELLE 戴军 2005华南农业大学学报2005,26,2:26
3不同形态有机碳的有效性在两种重金属污染水平下水稻土壤中的差异显示文摘调查分析了两块不同重金属污染水平下的水稻田土壤有机碳活性组分的含量,以评价重金属胁迫条件下有机碳摹质的微生物有效性。结果显示,重污染水稻土的总有机碳(TOC)、0.5mol·-L^-1 K3SO4溶解态有机碳(K2SO4-C)、微生物生物量碳(MBC)、1~7d(CO2-C1-7d)和8.28d矿化的有机碳(CO2-C8-28d)的含量均显著低于轻污染土壤(P〈0.001)。碳有效性指标中,微生物商(MBC/TOC比)和8-28d的有机碳矿化率(CO2-C8-28d·TOC^-1 d^-1))在轻污染土壤中较高,而K2SO4-C/TOC和代谢商(qCO2)在重污染土壤较高(P〈0.001)。1—7d的有机碳矿化率(CO2-C1-7d·TOC^-1d^-1)在两种土壤中差异不显著。两种土壤培养初期的有机碳矿化率远高于培养后期(P〈0.001)。逐步回归分析显示,CO2-C1-7d与活性组分K2SO4-C和MBC显著相关(r^2=0.83,P〈0.001),而CO2-C8-28d只与TOC显著相关(r^2=0.70,P〈0.001)。研究表明,尽管如SO4溶解态有机碳在供试的重金属污染的水稻土中是较易被分解的活性碳基质,但重金属污染抑制了微生物数量及其呼吸活性,降低了活性有机碳库的矿化率,这是导致土壤中K2SO4溶解态碳积累的原因。溶解性有机碳叉能提高重金属的有效性,进一步抑制微生物对有机碳的矿化。因此,评价重金属污染的水稻土有机碳的有效性,应当综合考虑小同有机碳库的活性、微生物的矿化能力和碳基质在不同阶段的供应潜力。李永涛 戴军 Thierryecquer Cécile Quantin Marc Benedetti Patrick Lavelle 2006生态学报2006,26,1:14
4Pyrrolidine dithiocarbamate reduces ischemia-reperfusion injury of the small intestine显示文摘AIM: To evaluate whether pyrrolidine dithiocarbamate (PDTC), an enhancer of HO production, attenuates intestinal IR injury.METHODS: Eighteen male rats were randomly allocated into three groups: (a) sham; (b) IR, consisting of 30 min of intestinal ischemia, followed by 2-h period of reperfusion; and (c) PDTC treatment before IR. Intestinal microvascular perfusion (IMP) was monitored continuously by laser Doppler fiowmetry. At the end of the reperfusion, serum samples for lactate dehydrogenase (LDH) levels and biopsies of ileum were obtained. HO activity in the ileum was assessed at the end of the reperfusion period.RESULTS: At the end of the reperfusion in the IR group,IMP recovered partially to 42.5% of baseline (P<0.05vs sham), whereas PDTC improved IMP to 67.3% of baseline (P<0.01 vs IR). There was a twofold increase in HO activity in PDTC group (2 062.66±106.11) as compared to IR (842.3±85.12) (P<0.001). LDH was significantly reduced (P<0.001) in PDTC group (585.6±102.4)as compared to IR group (1 973.8±306.5). Histological examination showed that the ileal mucosa was significantly less injured in PDTC group as compared with IR group.CONCLUSION: Our study demonstrates that PDTC improves the IMP and attenuates IR injury of the intestine possibly via HO production. Additional studies are warranted to evaluate the clinical efficacy of PDTC in the prevention of IR injury of the small intestine.Ismail H Mallick Wen-Xuan Yang Marc C Winslet Alexander M Seifalian 2005World Journal of Gastroenterology2005,11,46:8
5Early prediction of major depression in chronic hepatitis C patients during peg-interferon α-2b treatment by assessment of vegetative-depressive symptoms after four weeks显示文摘AIM: To study the predictive value of the vegetative- depressive symptoms of the Zung Depression Rating Scale for the occurrence of depression during treatment with peg-interferon α-2b of chronic hepatitis C (CHC) patients. METHODS: The predictive value of vegetative- depressive symptoms at 4 wk of treatment for the occurrence of a subsequent diagnosis of major depressive disorder (MDD) was studied in CHC patients infected after substance use in a prospective, multi- center treatment trial in Belgium. The presence of vegetative-depressive symptoms was assessed using the Zung Scale before and 4 wk after the start of antiviral treatment. RESULTS: Out of 49 eligible patients, 19 (39%) developed MDD. The area under the ROC curve of the vegetative Zung subscale was 0.73, P = 0.004. The sensitivity at a cut-point of > 15/35 was 95% (95% CI: 74-100). The positive predictive value equalled 44% (95% CI: 29-60). CONCLUSION: In this group of Belgian CHC patients infected after substance use, antiviral treatment caused a considerable risk of depression. Seven vegetativedepressive symptoms of the Zung scale at wk 4 of treatment predicted 95% of all emerging depressions, at a price of 56% false positive test results.Geert Robaeys Jozef De Bie Marieke C Wichers Liesbeth Bruckers Frederik Nevens Peter Michielsen Marc Van Ranst Frank Buntinx 2007World Journal of Gastroenterology2007,13,43:4
6Cachexia and pancreatic cancer: Are there treatment options?显示文摘Cachexia is frequently described in patients with pancreatic ductal adenocarcinoma(PDAC)and is associated with reduced survival and quality of life.Unfortunately,the therapeutic options of this multi-factorial and complex syndrome are limited.This is due to the fact that,despite extensive preclinical and clinical research,the underlying pathological mechanisms leading to PDAC-associated cachexia are still not fully understood.Furthermore,there is still a lack of consensus on the definition of cachexia,which complicates the standardization of diagnosis and treatment as well as the analysis of the current literature.In order to provide an efficient therapy for cachexia,an early and reliable diagnosis and consistent monitoring is required,which can be challenging especially in obese patients.Although many substances have been tested in clinical and preclinical settings,so far none of them have been proven to have a long-term effect in ameliorating cancer-associated cachexia.However,recent studies have demonstrated that multidimensional therapeutic modalities are able to alleviate pancreatic cancerassociated cachexia and ultimately improve patients’outcome.In this current review,we propose a stepwise and pragmatic approach to facilitate and standardize the treatment of cachexia in pancreatic cancer patients.This strategy consists of nutritional,dietary,pharmacological,physical and psychological methods.Tara C Mueller Marc A Burmeister Jeannine Bachmann Marc E Martignoni 2014World Journal of Gastroenterology2014,20,28:3
7Structure of the Ca2+-dependent PP2A heterotrimer and insights into Cdc6 dephosphorylation显示文摘B″蛋白质磷酸酶 2A (PP2A ) 的 /PR72 家庭一个重要 PP2A 家庭涉及多样的细胞的过程,并且特别地由钙绑定调整了到规章的子单元。在这个家庭的 PR70 子单元与房间部门控制 6 交往(Cdc6 ) ,为 DNA 复制的控制重要的一个房间周期管理者。这里,我们在 2.1 和 2.4 Å 的一个决定报导孤立的 PR72 和 trimeric PR70 holoenzyme 的水晶结构;,分别地并且在 Cdc6 dephosphorylation 的 vitro 描述。holoenzyme 结构表明 PR70 钙绑定主题之一直接联系支架子单元,导致在所有 PP2A holoenzymes 之中的最紧缩的支架子单元符合构造。PR70 也在活跃地点附近区别地绑在催化子单元,它被要求让 PR70 向 Cdc6 提高磷酸酶活动。我们的研究为 B″ 的唯一的规定提供一个结构的基础;由钙离子的 /PR72 holoenzymes,并且在 PP2A holoenzymes 之中为底层特性的精确控制建议机制。Nathan Wlodarchak Feng Guo Kenneth A Satyshur Li Jiang Philip D Jeffrey Tingwan Sun Vitali Stanevich Marc C Mumby Yongna Xing 2013Cell Research2013,23,7:3
8Diagnostic value of drain amylase for detecting intrathoracic leakage after esophagectomy显示文摘AIM:To investigate the value of elevated drain amylase concentrations for detecting anastomotic leakage(AL) after minimally invasive Ivor-Lewis esophagectomy(MIILE).METHODS:This was a retrospective analysis of prospectively collected data in two hospitals in the Netherlands. Consecutive patients undergoing MI-ILE were included. A Jackson-Pratt drain next to the dorsal side of the anastomosis and bilateral chest drains were placed at the end of the thoracoscopic procedure. Amylase levels in drain fluid were determined in all patients during at least the first four postoperative days. Contrast computed tomography scans and/or endoscopic imaging were performed in cases of a clinically suspected AL. Anastomotic leakage was defined as any sign of leakage of the esophago-gastric anastomosis on endoscopy,re-operation,radiographic investigations,post mortal examination or when gastro-intestinal contents were found in drain fluid. Receiver operator characteristic curves were used to determine the cut-off values. Sensitivity,specificity,positive predictive value,negative predictive value,risk ratio and overall test accuracy were calculated for elevated drain amylase concentrations.RESULTS:A t o t a l o f 8 9 p a t ie n t s w e re in c lu d e d between March 2013 and August 2014. No differences in group characteristics were observed between patients with and without AL,except for age. Patients with AL were older than were patients without AL(P = 0.01). One patient(1.1%) without AL died within 30 d after surgery due to pneumonia and acute respiratory distress syndrome. Anastomotic leakage that required any intervention occurred in 15 patients(16.9%). Patients with proven anastomotic leakage had higher drain amylase levels than patients without anastomotic leakage [median 384 IU/L(IQR 34-6263) vs median 37 IU/L(IQR 26-66),P = 0.003]. Optimal cut-off values on postoperative days 1,2,and 3 were 350 IU/L,200 IU/L and 160 IU/L,respectively. An elevated amylase level was found in 9 of the 15 patients with AL. Five of these 9 patients had early elevations of their amylase levels,with a median of 2 d(IQR 2-5) before signs and symptoms occurred.CONCLUSION:Measurement of drain amylase levels is an inexpensive and easy tool that may be used to screen for anastomotic leakage soon after MI-ILE. However,clinical validation of this marker is necessary.Gijs HK Berkelmans Ewout A Kouwenhoven Boudewijn JJ Smeets Teus J Weijs Luis C Silva Corten Marc J van Det Grard AP Nieuwenhuijzen Misha DP Luyer 2015World Journal of Gastroenterology2015,21,30:3
9Single-Element Solution Comparisons with a High-performance Inductively Coupled Plasma Optical Emission Spectrometry Method显示文摘Marc L Salit Gregory C Yurk Abigail P Lindstrom 2001Anal Chem2001,73,:2
10Tenecteplase Reperfusion therapy in Acute ischaemic Cerebrovascular Events-Ⅱ (TRACE Ⅱ): rationale and design显示文摘Background and purpose Tenecteplase(TNK)is a promising agent for treatment of acute ischaemic stroke(AIS).We hypothesised that recombinant human TNK tissue-type plasminogen activator(rhTNK-tPA)is non-inferior to rt-PA in achieving excellent functional outcome at 90 days,when administered within 4.5 hours of ischaemic stroke onset.Methods and design Tenecteplase Reperfusion therapy in Acute ischemic Cerebrovascular Events(TRACE)is a phase Ⅲ,multicentre,prospective,randomised,open-label,blinded-end point non-inferiority study.Patients eligible for intravenous thrombolysis therapy are randomised to rhTNK-tPA 0.25 mg/kg(single bolus)to a maximum of 25 mg or rt-PA 0.9 mg/kg(10%bolus+90%infusion/1 hour)to a maximum of 90 mg.Medications considered necessary for the patient’s health may be given at the discretion of the investigator during 90-day follow-up.Study outcomes The primary study outcome is excellent functional outcome defined as modified Rankin Scale(mRS)0–1 at 90 days.Secondary efficacy outcomes include favourable functional outcome defined as mRS≤2 at 90 days,ordinal distribution of mRS and major neurological improvement on the National Institutes of Health Stroke Scale.Safety outcomes are symptomatic intracranial haemorrhage within 36 hours and death from any cause.Discussion There is no completed registration study of TNK in AIS worldwide.TRACE Ⅱ strives to provide evidence for a new drug application for rhTNK-tPA in AIS within 4.5 hours through a well-designed and rigorously executed randomised trial in China.Shuya Li Bruce C V Campbell Lee H Schwamm Marc Fisher Mark Parsons Hao Li Yuesong Pan Yongjun Wang 2022Stroke & Vascular Neurology2022,7,1:2
11Triple therapy in treatment-experienced patients with HCV-cirrhosis in a multicentre cohort of the French Early Access Programme (ANRS CO20-CUPIC) – NCT01514890<!-- Doctopic: VH -->显示文摘Christophe Hézode Hélène Fontaine Céline Dorival Dominique Larrey Fabien Zoulim Valérie Canva Victor de Ledinghen Thierry Poynard Didier Samuel Marc Bourlière Jean-Pierre Zarski Jean-Jacques Raabe Laurent Alric Patrick Marcellin Ghassan Riachi Pierre-Henr 2013Journal of Hepatology2013,,:2
12Human cord blood-derived cells can differentiate into hepatocytes in the mouse liver with no evidence of cellular fusion显示文摘Philip N Newsome Ingolfur Johannessen Shelagh Boyle Evangelos Dalakas Karen A Mcaulay Kay Samuel Frances Rae Lesley Forrester Marc L Turner Peter C Hayes David J Harrison Wendy A Bickmore John N Plevris 2003Gastroenterology2003,,7:2
13Quantification of veterinary antibiotics (sulfonamides and trimethoprim) in animal manure by liquid chromatography–mass spectrometry显示文摘Michel Y Haller Stephan R Müller Christa S McArdell Alfredo C Alder Marc J.-F Suter 2002Journal of Chromatography A2002,,1:2
14Towards high-throughput identification of endocrine disrupting compounds with mass spectrometry显示文摘Cédric Bovet Benoit Plet Marc Ruff Sylvia Eiler Florence Granger Andreas Panagiotidis Ryan Wenzel Alexis Nazabal Dino Moras Renato Zenobi 2009Toxicology in Vitro2009,,4:2
152009 Focused Update: ACCF/AHA Guidelines for the Diagnosis and Management of Heart Failure in Adults: A Report of the American College of Cardiology Foundation/American Heart Association Task Force on Practice Guidelines显示文摘Mariell Jessup William T. Abraham Donald E. Casey Arthur M. Feldman Gary S. Francis Theodore G. Ganiats Marvin A. Konstam Donna M. Mancini Peter S. Rahko Marc A. Silver Lynne Warner Stevenson Clyde W. Yancy Sharon Ann Hunt William T. Abraham Marshall H. C 2009Circulation2009,,14:2
16Designing flexible manipulators with the lowest natural frequency nearly independent of position显示文摘LOUIS J E JENNCHEN T MARC C 1999IEEE Transaction on Robotics and Automation1999,15,4:1
17A review of vaccine research and development: human acute respiratory infections显示文摘Marc PG Thomas C Yuri P 2005Vaccine2005,23,:1
18Activation mechanism for sacrificial Al/Zn/Hg anodes显示文摘Max C Reboul Marc C Delatte 1980Materials Performance1980,19,5:1
19Helicobacer pylori initiate or perpetuate immune thrombocytopenic purpura? 显示文摘Marc M Nichola C Christelle J 2004Blood2004,103,3:1
20The role of the brain re- nin-angiotensin system in hypertension: Implica- tions for new treatment显示文摘Marc Y Llorens-Cortes C 2011Progress in Neurobiolo-gy2011,95,2:1
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