Search results for "F.U.E."

Dye-tracer technique for rill flows by velocity profile measurements

2020

Abstract Water flow on hillslope soil surface supplies energy which is required to detach soil particles, to transport and deposit sediments, therefore flow velocity is a key variable related to hillslope hydrodinamics of soil erosion processes. Among the different methods available for measuring velocity of shallow interrill and rill flow, the trace technique is widely used. Trace technique is applied by adding a material (salt, magnetic material, water isotope, floating object) and then measuring the speed of the material to travel a known distance from the injection point. When flow velocity is measured using a dye-tracing method, the mean velocity is calculated by multiplying the measur…

Flume experiments for assessing the dye-tracing technique in rill flows

2021

Abstract Flow velocity controls hillslope soil erosion and is a key hydrodynamic variable involved in sediment transport and deposition processes. The dye-tracer technique is one of the most applied methods for measuring velocity of shallow interrill and rill flow. The technique is based on the injection of a tracer in a specific point and the measurement of its speed to travel the known distance from the injection point to a given channel section. The dye-tracer technique requires that the measured surface flow velocity has to be corrected to obtain the mean flow velocity using a correction factor which is generally empirically deduced. The technique has two sources of uncertainties: i) th…

Direct seeding mulch-based cropping increases both the activity and the abundance of denitrifier communities in a tropical soil

2009

International audience; This study evaluated the impact of direct seeding mulch-based cropping (DMC), as an alternative to conventional tilling (CT), on a functional community involved in N cycling and emission of greenhouse gas nitrous oxide (N2O). The study was carried out for annual soybean/rice crop rotation in the Highlands of Madagascar. The differences between the two soil management strategies (direct seeding with mulched crop residues versus tillage without incorporation of crop residues) were studied along a fertilization gradient (no fertilizer, organic fertilizer, organic plus mineral fertilizers). The activity and size of the denitrifier community were determined by denitrifica…

Global and time-resolved monitoring of crop photosynthesis with chlorophyll fluorescence

2014

Guanter, Luis et al.

Peculiarities of X-Ray Diffraction in Crystals with Diffuse Boundaries of Twin on System {011}, <011>

2000

L’Européen

1989

Enfermeiras e profissionais durante a epidemia de gripe de 1918: Análise através da imprensa española

2018

espanolObjetivo: La epidemia de gripe de 1918 se considera una de las mas letales de la historia de la humanidad, ocasionando una alta morbilidad y mortalidad que quedo reflejada en la prensa espanola. Por ello, pretendemos abordar los acontecimientos relativos a la epidemia en relacion con los profesionales de Enfermeria desde la perspectiva periodistica. Material y metodo: A partir de diez cabeceras de periodicos espanoles se ha procedido a la extraccion de las informaciones relativas a profesionales de Enfermeria, desde el 1 de enero de 1918 hasta el 31 de diciembre de 1920, procediendo a su organizacion y caracterizacion tematica. Resultados: Se obtuvieron un total de 555 unidades de an…

Baltijas Psiholoģijas žurnāls

2013

Riin Seema, Anna Sircova. Mindfulness – a Time Perspective? Estonian Study ; Emīls Kālis, Līga Roķe, Indra Krūmiņa. Indicators of Creative Potential in Drawings: Proposing New Criteria for Assessment of Creative Potential with the Test for Creative Thinking – Drawing Production ; Ieva Urbanaviciute, Antanas Kairys, Inga Juodkune, Audrone Liniauskaite. The Lithuanian Version of the Global Motivation Scale: Testing Its Reliability and Factorial Validity ; Maruta Ludāne, Ieva Bite. Predictors of Cognitive Appraisal of Job Loss among the Unemployed Aged over 45 Years ; Per Eisele. Pooling Unshared Information: Comparing Computer-Mediated Group Discussion with Face-to-Face Group Discussion and E…

Transformation of follicular lymphoma to diffuse large cell lymphoma is associated with a heterogeneous set of DNA copy number and gene expression al…

2002

AbstractGenomic aberrations in a series of paired biopsy samples from patients who presented initially with follicle center lymphoma (FCL) and subsequently transformed to diffuse large B-cell lymphoma (DLBCL) were measured by array comparative genomic hybridization (CGH). The consequences of these aberrations on gene expression were determined by comparison with expression analysis on these specimens using cDNA microarrays. A heterogeneous pattern of acquired genomic abnormalities was observed upon transformation, some of which were recurrent in small subsets of patients. Some of the genomic aberration acquired upon transformation, such as gain/amplification of 1q21-q24, 2p16 (REL/BCL11A ge…

CH4 oxidation in a boreal lake during the development of hypolimnetic hypoxia

2020

AbstractFreshwater ecosystems represent a significant natural source of methane (CH4). CH4 produced through anaerobic decomposition of organic matter (OM) in lake sediment and water column can be either oxidized to carbon dioxide (CO2) by methanotrophic microbes or emitted to the atmosphere. While the role of CH4 oxidation as a CH4 sink is widely accepted, neither the magnitude nor the drivers behind CH4 oxidation are well constrained. In this study, we aimed to gain more specific insight into CH4 oxidation in the water column of a seasonally stratified, typical boreal lake, particularly under hypoxic conditions. We used 13CH4 incubations to determine the active CH4 oxidation sites and the …