|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | 新疆地区表土孢粉分布规律及其与植被关系研究显示文摘对中国新疆地区218个样点进行植被调查及表土孢粉分析的研究结果表明,新疆地区温带山地针叶林、高寒草甸及盐生草甸、温带草原、荒漠以及荒漠-沙漠过渡带均具有相对特殊的孢粉组合,新疆南北向样带的孢粉图式揭示出表土孢粉从北到南随地形、纬度和植被的改变而发生的空间变化。针叶林区表土孢粉浓度平均值为22 602粒/g、草原为3 834粒/g、荒漠为1 762粒/g、沙漠为0-10粒/g。但在同一植被类型中,特别是在草原和荒漠中,孢粉浓度与植被盖度之间并不呈现线性相关关系。根据大空间尺度样品的A/C(蒿Artemisia/藜Chenopodiaceae)值的中位数统计,草原为1.264、荒漠为0.565、沙漠为0.243。Ep/C(麻黄Ephedra/藜Chenopodiaceae)比值的中位数在荒漠为0.098、草原为0.063。 | 罗传秀 郑卓 潘安定 安放舟 Celia BEAUDOUIN 黄康有 | 2007 | 干旱区地理2007,30,4: | 32 |
| 2 | 新疆地区表土孢粉空间分布规律研究显示文摘中国新疆地区表土花粉研究结果展示了干旱区主要孢粉的空间分布规律,大部分表土花粉属种的地理空间分布与含量与相应植物的分布区域基本一致,藜科、蒿属、麻黄属及木本植物云杉属、桦木属等花粉普遍呈超代表性,柽柳属花粉呈低代表性。干旱区主要草灌木表土花粉数据的聚类分析结果可以基本反映本区植物群落的主要生态组合类型。主成分分析进一步表明该区草本和灌木花粉分布主要受水文和湿度等因素控制。 | 罗传秀 郑卓 潘安定 安放舟 BEAUDOUIN Celia 黄康有 | 2008 | 地理科学2008,28,2: | 34 |
| 3 | 中国表土花粉与建群植物地理分布的气候指示性对比显示文摘利用中国建群植物数字化的地理分布数据与1860个中国表土样品花粉数据和气候插值定量分析了中国主要花粉含量与植物种类的地理分布和气候指示性.研究结果显示,绝大多数表土花粉含量的气候指示性与建群植物地理分布的气候区间是吻合的,表土花粉与建群植物的气候阈值的重合取决于花粉与气候的正态分布关系.此外,部分花粉种类指示的气候相对于植物存在一定的偏移,如杜鹃花科、菊科、禾本科和藜科等,这与花粉的分类鉴定水平较低和自然植被的人为干扰有关.本研究在较大空间尺度范围内将表土花粉与建群植物的气候指示性进行对比,为全球生态学、第四纪环境和古气候学研究提供了重要的数据和参照. | 郑卓 黄康有 许清海 吕厚远 Rachid Cheddadi 罗运利 Celia Beaudouin 罗传秀 郑艳伟 李春海 魏金辉 杜春彬 | 2008 | 中国科学(D辑)2008,38,6: | 32 |
| 4 | Comparison of climatic threshold of geographical distribution between dominant plants and surface pollen in China显示文摘The geographical distribution of dominant plant species in China was georeferenced and climatic variables were interpolated into all grids.Accordingly,the percentage distributions of principal pollen taxa based on 1860 surface pollen sites in China were selected and the related climate values were interpolated with the same method. The geographical and climatic comparison between the two data-sets indicated that the climate threshold of most pollen taxa from surface pollen is coherent with plant distributions. The climatic envelopes of dominant plant are mostly accordant with those of pollen taxa at certain levels. However, some distinct offsets of the climate ranges exist between the two datasets for most pollen taxa identified at family level, such as Ericaceae,Asteraceae, Poaceae and Chenopodiaceae. The present study provides for the first time rich information on temperature and precipitation in relation to pollen and plant distribution based on the datasets on a continental scale useful for global ecological modeling and Quaternary palaeoclimate reconstruction. | CHEDDADI Rachid BEAUDOUIN Celia | 2008 | Science China Earth Sciences2008,51,8: | 26 |
| 5 | Clinical value of rapid urine trypsinogen-2 test strip, urinary trypsinogen activation peptide, and serum and urinary activation peptide of carboxypeptidase B in acute pancreatitis显示文摘AIM: To assess the usefulness of urinary trypsinogen-2 test strip, urinary trypsinogen activation peptide (TAP),and serum and urine concentrations of the activation peptide of carboxypeptidase B (CAPAP) in the diagnosisof acute pancreatitis.METHODS: Patients with acute abdominal pain and hospitalized within 24 h after the onset of symptoms were prospectively studied. Urinary trypsinogen-2 was considered positive when a clear blue line was observed (detection limit 50 μg/L). Urinary TAP was measured using a quantitative solid-phase ELISA, and serum and urinary CAPAP by a radioimmunoassay method.RESULTS: Acute abdominal pain was due to acute pancreatitis in 50 patients and turned out to be extrapancreatic in origin in 22 patients. Patients with acute pancreatitis showed significantly higher median levels of serum and urinary CAPAP levels, as well as amylase and lipase than extrapancreatic controls. Median TAP levels were similar in both groups. The urinary trypsinogen-2 test strip was positive in 68% of patients with acute pancreatitis and 13.6% in extrapancreatic controls (P<0.01). Urinary CAPAP was the most reliable test for the diagnosis of acute pancreatitis (sensitivity 66.7%, specificity 95.5%, positive and negative predictive values 96.6% and 56.7%, respectively), with a 14.6 positive likelihood ratio for a cut-off value of 2.32 nmol/L.CONCLUSION: In patients with acute abdominal pain,hospitalized within 24 h of symptom onset, CAPAP in serum and urine was a reliable diagnostic marker of acute pancreatitis. Urinary trypsinogen-2 test strip showed a clinical value similar to amylase and lipase.Urinary TAP was not a useful screening test for the diagnosis of acute pancreatitis. | Jesús Sáez Juan Martínez Celia Trigo José Sánchez-Payá Luis Compay Raquel Laveda Pilar Grió Cristina García Miguel Pérez-Mateo | 2005 | World Journal of Gastroenterology2005,11,46: | 21 |
| 6 | 课堂图书馆——英语泛读教学新模式显示文摘课堂图书馆在我国的外语教学界尚处在尝试之中。文献表明,K rashen语言习得理论中的输入假设和情感过滤假设为创建课堂图书馆英语泛读教学模式提供了理论支持,而图式理论的运用从实践上保证了课堂图书馆的可操作性。文章最后讨论了课堂图书馆对外语教师带来的挑战。 | 马庆林 Celia Newberry | 2005 | 西安外国语学院学报2005,13,4: | 17 |
| 7 | 基于遥感数据对中国表土花粉进行植被覆盖度定量估算的研究显示文摘本文主要探讨利用现代类比法将表土花粉数据定量转换为植被覆盖度的方法,以及该方法在中国复杂地貌和气候环境中应用的可行性和可信度。陆地植被覆盖使用了卫星遥感MODIS500×500m分辨率的栅格数据,覆盖度分类为乔木、草地和裸地三种。使用的表土花粉数据共1127个样点,其地理分布基本能够覆盖中国的各种植被类型。用于现代类比法定量计算的花粉变量类型共64个。研究结果表明,计算获得的每个样点的植被覆盖度与MODIS实际观测值具有很好的对应性,基于花粉的覆盖度估算值与遥感实际观测值之间的相关性很高,其中裸地达到0.99,乔木达到0.97,草地为0.95。从空间分布看,利用花粉定量转换的植被覆盖样点可以清楚地识别从裸地向草地和乔木的变化区间,并且与植被分布的实际情况吻合。本研究证明,基于中国表土花粉数据对植被覆盖度的定量恢复是可行的。此外,研究发现乔木覆盖度较高的对应特征花粉较多,主要是松属、栲属、栎属(含青冈栎)、桦属、桤木属、杨梅属、冷杉属、云杉属等,而草地的对应特征花粉类型有莎草科、禾本科、蒿属、蔷薇科、豆科等,裸地主要为麻黄属和藜科等。 | 郑卓 郑艳伟 黄康有 魏金辉 许清海 吕厚远 罗运利 罗传秀 Celia Beaudouin | 2009 | 古生物学报2009,48,2: | 12 |
| 8 | Nutrient Intakes of Pregnant Women and their Associated Factors in Eight Cities of China: A Cross-sectional Study显示文摘 | Fang-Li Liu Yu-Mei Zhang Gerard Vinyes Pares Kathleen C Reidy Wen-Zhi Zhao Ai Zhao Cheng Chen Celia Y Ning Ying-Dong Zheng Pei-Yu Wang | 2015 | Chinese Medical Journal2015,,13: | 12 |
| 9 | Antibiotic Resistance Genes in the Human-Impacted Environment:A One Health Perspective显示文摘Antibiotic resistance and its environmental component are gaining more attention as part of combating the growing healthcare crisis. The One Health framework, promulgated by many global health agencies, recognizes that antimicrobial resistance is a truly inter-domain problem in which human health, animal agriculture, and the environment are the core and interrelated components.This prospectus presents the status and issues relevant to the environmental component of antibiotic resistance, namely, the needs for advancing surveillance methodology: the environmental reservoirs and sources of resistance, namely, urban wastewater treatment plants, aquaculture production systems, soil receiving manure and biosolid, and the atmosphere which includes longer range dispersal.Recently, much work has been done describing antibiotic resistance genes in various environments;now quantitative, mechanistic,and hypothesis-driven studies are needed to identify practices that reduce real risks and maintain the effectiveness of our current antibiotics as long as possible. Advanced deployable detection methods for antibiotic resistance in diverse environmental samples are needed in order to provide the surveillance information to identify risks and define barriers that can reduce risks. Also needed are practices that reduce antibiotic use and thereby reduce selection for resistance, as well as practices that limit the dispersal of or destroy antibiotic-resistant bacteria or their resistance genes that are feasible for these varied environmental domains. | James M. TIEDJE WANG Fang Celia M. MANAIA Marko VIRTA SHENG Hongjie MA Liping ZHANG Tong Edward TOPP | 2019 | Pedosphere2019,29,3: | 11 |
| 10 | Mechanisms of Optimal Defense Patterns in Nicotiana attenuata: Flowering Attenuates Herbivory-elicited Ethylene and Jasmonate Signaling显示文摘To defend themselves against herbivore attack,plants produce secondary metabolites,which are variously inducible and constitutively deployed,presumably to optimize their fitness benefits in light of their fitness costs.Three phytohormones,jasmonates (JA) and their active forms,the JA-isoleucine (JA-Ile) and ethylene (ET),are known to play central roles in the elicitation of induced defenses,but little is known about how this mediation changes over ontogeny.The Optimal Defense Theory (ODT) predicts changes in the costs and benefits of the different types of defenses and has been usefully extrapolated to their modes of deployment.Here we studied whether the herbivore-induced accumulation of JA,JA-Ile and ET changed over ontogeny in Nicotiana attenuata,a native tobacco in which inducible defenses are particularly well studied.Herbivore-elicited ET production changed dramatically during six developmental stages,from rosette through flowering,decreasing with the elongation of the first corollas during flower development.This decrease was largely recovered within a day after flower removal by decapitation.A similar pattern was found for the herbivore-induced accumulation of JA and JA-Ile.These results are consistent with ODT predictions and suggest that the last steps in floral development control the inducibility of at least three plant hormones,optimizing defense-growth tradeoffs. | Celia Diezel Silke Allmann Ian T.Baldwin | 2011 | Journal of Integrative Plant Biology2011,53,12: | 11 |
| 11 | 基于岩土介质三维孔隙结构的两相流模型显示文摘地下储层中岩土介质一般具有较低的孔隙连通性,宏观流动模拟一般忽略微观尺度的孔隙连通性,通过渗透率、弯曲度等参数反映储层的整体特性。但岩土介质的多孔性及孔隙间复杂的连通性,使得宏观描述流体在岩土介质中流动不能反映其内在流动特征。孔隙结构模型的建立可以反映岩土介质中孔隙的几何形态及空间连通性,为解释流体在复杂多孔介质中的流动特性提供有效手段。通过考虑岩土介质孔隙尺寸分布、孔隙孔喉空间相关性、孔隙连通性等特征参数,建立了反映不同岩土介质连通性、各向异性特征的等效孔隙网络模型。等效孔隙网络模型通过水力特征参数等效的方式反映岩土介质三维微观孔隙结构,通过渗透率计算验证了模型的有效性。此外,基于建立的孔隙结构模型,开发了孔隙尺度动态两相流计算模型,模型可以反映孔隙内弯液面的动态运动过程,直观反映多孔介质中的优势渗流,可以为不同孔隙尺度岩土介质提供表观渗透率、击穿曲线、相对渗透率曲线等宏观计算参数。将孔隙尺度两相流模型应用于页岩气开采中水力阻滞特性研究,结果表明:页岩基质的残余饱和度约为30%,随着平均配位数的增加,残余饱和度显著降低。 | 张鹏伟 胡黎明 Jay N Meegoda Michael A Celia | 2020 | 岩土工程学报2020,42,1: | 10 |
| 12 | Recent advances in arsenic trioxide encapsulated nanoparticles as drug delivery agents to solid cancers显示文摘Since arsenic trioxide was first approved as the front line therapy for acute promyelocytic leukemia 25 years ago,its anti-cancer properties for various malignancies have been under intense investigation.However,the clinical successes of arsenic trioxide in treating hematological cancers have not been translated to solid cancers.This is due to arsenic's rapid clearance by the body's immune system before reaching the tumor site.Several attempts have henceforth been made to increase its bioavailability toward solid cancers without increasing its dosage albeit without much success.This review summarizes the past and current utilization of arsenic trioxide in the medical field with primary focus on the implementation of nanotechnology for arsenic trioxide delivery to solid cancer cells.Different approaches that have been employed to increase arsenic's efficacy,specificity and bioavailability to solid cancer cells were evaluated and compared.The potential of combining different approaches or tailoring delivery vehicles to target specific types of solid cancers according to individual cancer characteristics and arsenic chemistry is proposed and discussed. | Anam Akhtar Scarlet Xiaoyan Wang Lucy Ghali Celia Bell Xuesong Wen | 2017 | The Journal of Biomedical Research2017,31,3: | 10 |
| 13 | Operative complications and economic outcomes of cholecystectomy for acute cholecystitis显示文摘BACKGROUND Recent management of acute cholecystitis favors same admission(SA)or emergent cholecystectomy based on overall shorter hospital stay and therefore cost savings.We adopted the practice of SA cholecystectomy for the treatment of acute cholecystitis at our tertiary care center and wanted to evaluate the economic benefit of this practice.We hypothesized that the existence of complications,particularly among patients with a higher degree of disease severity,during SA cholecystectomy could negate the cost savings.AIM To compare complication rates and hospital costs between SA vs delayed cholecystectomy among patients admitted emergently for acute cholecystitis.METHODS Under an IRB-approved protocol,complications and charges for were obtained for SA,later after conservative management(Delayed),or elective cholecystectomies over an 8.5-year period.Patients were identified using the acute care surgery registry and billing database.Data was retrieved via EMR,operative logs,and Revenue Cycle Operations.The severity of acute cholecystitis was graded according to the Tokyo Guidelines.TG18 categorizes acute cholecystitis by Grades 1,2,and 3 representing mild,moderate,and severe,respectively.Comparisons were analyzed withχ2,Fisher’s exact test,ANOVA,ttests,and logistic regression;significance was set at P<0.05.RESULTS Four hundred eighty-six(87.7%)underwent a SA while 68 patients(12.3%)received Delayed cholecystectomy.Complication rates were increased after SA compared to Delayed cholecystectomy(18.5%vs 4.4%,P=0.004).The complication rates of patients undergoing delayed cholecystectomy was similar to the rate for elective cholecystectomy(7.4%,P=0.35).Mortality rates were 0.6%vs 0%for SA vs Delayed.Patients with moderate disease(Tokyo 2)suffered more complications among SA while none who were delayed experienced a complication(16.1%vs 0.0%,P<0.001).Total hospital charges for SA cholecystectomy were increased compared to a Delayed approach($44500±$59000 vs$35300±$16700,P=0.019).The relative risk of developing a complication was 4.2x[95%confidence interval(CI):1.4-12.9]in the SA vs Delayed groups.Among eight patients(95%CI:5.0-12.3)with acute cholecystitis undergoing SA cholecystectomy,one patient will suffer a complication.CONCLUSION Patients with Tokyo Grade 2 acute cholecystitis had more complications and increased hospital charges when undergoing SA cholecystectomy.This data supports a selective approach to SA cholecystectomy for acute cholecystitis. | Christopher P Rice Krishnamurthy B Vaishnavi Celia Chao Daniel Jupiter August B Schaeffer Whitney R Jenson Lance W Griffin William J Mileski | 2019 | World Journal of Gastroenterology2019,25,48: | 8 |
| 14 | Low-cost disordered carbons for Li/S batteries: A high- performance carbon with dual porosity derived from cherry pits显示文摘一微 -- 并且从樱桃坑废物获得并且与 H 3 PO 4 酸为 Li/S 电池作为硫主人被学习了。碳有 1,662 m 2 灀楡的一个高特定的表面区域吗? | Celia Hernandez-Rentero Rafael Cordoba Noelia Moreno Alvaro Caballero Julian Morales Mara Olivares-Marin Vicente Gomez-Serrano | 2018 | Nano Research2018,11,1: | 7 |
| 15 | Metabolic alterations in cancer cells and therapeutic implications显示文摘Cancer metabolism has emerged as an important area of research in recent years.Elucidation of the metabolic differences between cancer and normal cells and the underlying mechanisms will not only advance our understanding of fundamental cancer cell biology but also provide an important basis for the development of new therapeutic strategies and novel compounds to selectively eliminate cancer cells by targeting their unique metabolism.This article reviews several important metabolic alterations in cancer cells,with an emphasis on increased aerobic glycolysis (the Warburg effect) and glutamine addiction,and discusses the mechanisms that may contribute to such metabolic changes.In addition,metabolic alterations in cancer stem cells,mitochondrial metabolism and its influence on drug sensitivity,and potential therapeutic strategies and agents that target cancer metabolism are also discussed. | Naima Hammoudi Kausar Begam Riaz Ahmed1 Celia Garcia- Prieto Peng Huang | 2011 | Chinese Journal of Cancer2011,30,8: | 6 |
| 16 | Bone marrow-derived monocyte infusion improves hepatic fibrosis by decreasing osteopontin,TGF-β1,IL-13 and oxidative stress显示文摘AIM To evaluate the therapeutic effects of bone marrowderived CD11b+CD14+ monocytes in a murine model of chronic liver damage. METHODS Chronic liver damage was induced in C57BL/6 mice by administration of carbon tetrachloride and ethanol for 6 mo. Bone marrow-derived monocytes isolated by immunomagnetic separation were used for therapy. The cell transplantation effects were evaluated by morphometry,biochemical assessment,immunohistochemistry and enzyme-linked immunosorbent assay. RESULTS CD11b+CD14+ monocyte therapy significantly reduced liver fibrosis and increased hepatic glutathione levels. Levels of pro-inflammatory cytokines,including tumor necrosis factor-α,interleukin(IL)-6 and IL-1β,in addition to pro-fibrotic factors,such as IL-13,transforming growth factor-β1 and tissue inhibitor of metalloproteinase-1 also decreased,while IL-10 and matrix metalloproteinase-9 increased in the monocytetreated group. CD11b+CD14+ monocyte transplantation caused significant changes in the hepatic expression of α-smooth muscle actin and osteopontin. CONCLUSION Monocyte therapy is capable of bringing about improvement of liver fibrosis by reducing oxidative stress and inflammation,as well as increasing antifibrogenic factors. | Veruska Cintia Alexandrino de Souza Thiago Almeida Pereira Valéria Wanderley Teixeira Helotonio Carvalho Maria Carolina Accioly Brelaz de Castro Carolline Guimaraes D’assuncao Andreia Ferreira de Barros Camila Lima Carvalho Virgínia Maria Barros de Lorena Vláudia Maria Assis Costa Alvaro Aguiar Coelho Teixeira Regina Celia Bressan Queiroz Figueiredo Sheilla Andrade de Oliveira | 2017 | World Journal of Gastroenterology2017,23,28: | 6 |
| 17 | 中国进行低成本CO2埋存示范项目的机遇显示文摘为了证明CO2捕集和埋存是缓解气候变化的一个主要措施,要在全世界各种不同的地质储层中开展CO2埋存示范项目。在中国,通过煤气化生产NH,的工厂有一些低成本的CO2气源。在这些工厂,因产生的CO2超过其他生产目的(例如合成尿素)的所需量,多余的CO2就作为一种相对纯净的气体排出。如果附近有适当的埋存地点,这些CO2气体可作为埋存示范项目的具有经济吸引力的潜在埋存对象。本研究调查和评估了中国现在燃煤合成氨厂CO2的可用程度。结果表明,单个工厂每年可提供相对纯净的CO2量为0.6-1.1Mt。分析了在CO2气源附近进行地质埋存的可行性。把CO2气源的地理位置标示在可能存在适合CO2埋存油气藏的中国产油沉积盆地中,发现了四对有前景的CO2气源和埋存地点。深部盐水层埋存的工程费用预计为$15-21/tCO2。此外,还评估了气源附近提高石油采收率和煤层气采收率的潜力。 | Kyle C. Meng Robert H. Williams Michael A. Celia | 2009 | 石油科技动态2009,,11: | 4 |
| 18 | Functional Recovery of Chronic Paraplegic Pigs After Autologous Transplantation of Bone Marrow Stromal Cells显示文摘 | Mercedes Zurita Jesús Vaquero Celia Bonilla Martín Santos Javier De Haro Santiago Oya Concepción Aguayo | 2008 | Transplantation2008,,6: | 3 |
| 19 | Pneumatosis Intestinalis in Adults: Management, Surgical Indications, and Risk Factors for Mortality显示文摘 | Alexander J. Greenstein Scott Q. Nguyen Ana Berlin Jacqueline Corona Jonathan Lee Everlyn Wong Stephanie H. Factor Celia M. Divino | 2007 | Journal of Gastrointestinal Surgery2007,,10: | 3 |
| 20 | 极低温条件下使用的X级管线钢感应弯头显示文摘感应弯制的工艺已成功地用于生产高强,大口径,厚壁,极低温级的管子弯头,为了达到管线钢性质和弯头参数的恰当组合,这个工作进行了多年。弯制工艺使用了中频感应线圈将管子的一个带充分加热到A3以上的温度,同时液压头对要变形的管端施加轴向的推力,而另一管端被围绕半园轨迹旋转的弯制臂夹住,仅允许变形发生在加热的窄带上。为了使X-等级管子在感应弯制热加工之后维持期望的低温韧性,管子必须有恰当的化学成分,本文描述产生这个结论的多种管线钢的广泛机械试验,还将讨论材料的显微组织变化对材料韧性的影响。本文描述了由于管子表面受铜的污染,促使管材的脆化问题,这导致了在生产中弯头外园弧的裂纹,讨论了避免这种液体致金属脆裂的方法。最后,作了概要的描述。 | Celia D.Youngren Robert L.Hipley 姜放 林雪梅 | 1999 | 天然气与石油1999,17,1: | 3 |