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    题名 作者 年代 出处 被引量
1Assessment of the plug flow and dead volume ratios in a sub-surface horizontal-flow packed-bed reactor as a representative model of a sub-surface horizontal constructed wetland显示文摘David Jafet Rodríguez Alcocer Germán Giácoman Vallejos Pascale Champagne 2011Ecological Engineering2011,,:2
2An Invasive Succulent Plant (Kalanchoe daigremontiana) Influences Soil Carbon and Nitrogen Mineralization in a Neotropical Semiarid Zone显示文摘It has long been recognized that plant invasions may alter carbon(C) and nitrogen(N) cycles, but the direction and magnitude of such alterations have been rarely quantified. In this study, we quantified the effects caused by the invasion of a noxious exotic plant,Kalanchoe daigremontiana(Crassulaceae), on C and N mineralization and enzymatic and microbial activities in the soil of a semiarid locality in Venezuela. We compared soil parameters associated with these processes(C and N mineralization time and the cumulative values, fluorescein diacetate hydrolytic activity, and activities of dehydrogenase, β-glucosidase, glucosaminidase, and urease) between invaded and adjacent non-invaded sites. In addition, correlations among these parameters and the soil physical-chemical properties were also examined to determine if a positive feedback exists between nutrient availability and K. daigremontiana invasion. Overall,our results showed that C mineralization and transformation of organic compounds to NH_4^+ were favored at sites colonized by K.daigremontiana. With this species, we found the highest cumulative amounts of NH_4^+-N and C and the lowest mineralization time.These results could be explained by higher activities of urease and glucosaminidase in soils under the influence of K. daigremontiana.In addition, higher amounts of organic matter and moisture content in invaded soils might favor C and N mineralization. In conclusion,invasion of Neotropical semiarid zones by K. daigremontiana may influence the chemical and biological properties of the soils covered by this species, increasing nutrient bioavailability, which, in time, can facilitate the invasion process.Ileana HERRERA Jose R. FERRER-PARIS Diana BENZO Saul FLORES Belkis GARCIA Jafet M. NASSAR 2018Pedosphere2018,28,4:2
3Assessment of the plug flow and dead volume ratios in a sub-surface horizontal-flow packed-bed reactor as a representative model of a sub-surface horizontal constructed wetland显示文摘David Jafet Rodríguez Alcocer Germán Giácoman Vallejos Pascale Champagne 2011Ecological Engineering2011,,:1
4Improve SWAT model performance with time-dynamic voronoi tessellation of climatic input data in southern Africa 显示文摘Jafet C M Alexander J B Bernhard W 2012Journal of the American Water Resources Association2012,48,3:1
5A calibration technique to evaluate the power-law parameters of polymer melts using a torque-rheometer显示文摘Marquez Alfredo Quijano Jafet Gaulin Marc 1996Polymer Engineering and Science1996,36,20:1
6How Different Are Diverse Populations inScreening for Preeclampsia?显示文摘There is a big question on the level of differences between diverse populations.Genetically speaking,a pair of random individuals from two different populations can be more similar than two random individuals from any single population.1 The human genome project was key in showing how similar all humans are,describing that although humans may have different haplotypes,haplotype frequencies,and to some extent,different combinations of alleles,both common and rare haplotypes are often shared across populations.2 Studies in very different populations,such as Europeans,sub-Saharan Africans,and East Asians,have shown that complex phenotypes influenced primarily by rare alleles may correspond poorly with population labels and other population-typical traits.Raigam Jafet Martinez-Portilla Liona C.Poon 2021Maternal-Fetal Medicine2021,3,2:0
7加速人群健康改善计划显示文摘由于新型冠状病毒肺炎(COVID-19)疫情,使长期存在的医疗公平性差距更加突出1。为减少这种差距,对健康有决定性作用的其他社会部门之间的协调行动开始持续升温。事实上,医疗卫生部门使用的传统健康改进方法(包括工具与语言的资源共享)很有竞争优势,也可用于教育、地方政府、执法等其他部门以改进社会健康决定因素。这种方法相互借鉴可以提升这些部门共同为“人群健康改善”努力的效果。Pedro Delgado Kristine Binzer Amar Shah Jesper Ekberg Jafet Arrieta Dominique Allwood 张莉(译) 周红霞(校) 2022英国医学杂志中文版2022,25,2:0
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