112,117 research outputs found
Effetti di stress ambientali sui processi fotochimici in Pinus halepensis Mill. analizzati mediante fluorescenza fogliare.
No full textEnvironmental parameters in relation to the response of Trifolium repens L. cv. Menna to ambient ozone
No full textauthor-bios-SRD-19-0063.R1 – Supplemental material for The Network Structure of Police Misconduct
No full textSupplemental material, author-bios-SRD-19-0063.R1 for The Network Structure of Police Misconduct by George Wood, Daria Roithmayr and Andrew V. Papachristos in Socius</p
Ecophysiological characterization of Citrus sinensis (L.) Osbeck and relationships with type and amount of biogenic emissions
No full textIn this paper are shown the results obtained on Citrus sinensis (L.) Osbeck during the sampling campaigns performed in Burriana (Spain) in the frame of B.E.M.A. project. The daily trends of photosynthesis (A) showed higher values at morning and a decrement during the hottest hours of the day; for leaf transpiration (E) we observed a slight increment during the day. During different months (May '96, June '97 and July '95) we noted a progressive reduction in gas exchange of the leaves in relation to build-up of summer stress condition (-49% and -60% for June and July respect to May). In particular, net photosynthesis and leaf transpiration measured on Citrus leaves were, in general, characterised by low average values (2.7 +/- 0.06 (s.e.) mu mol CO2 m(-2)s(-1) and 0.665 +/- 0.021 (s.e.) mmol H2O m(-2)s(-1) for current leaves, respectively). The relationship between biogenic volatile organic compound (BVOC) emission rates normalised by assimilation (A) and gas exchange parameters as E/A ratio is reported. This latter is considered as an useful functional index to determine different vegetation types on a functional basis. We also found a good correlation between BVOC normalised emissions with air temperature. This behaviour has been reported for other species having monoterpene compounds in storage structures as Pinus species. Moreover, it is evident an uncoupling between BVOC emissions and photosynthesis. (C) 1999 Elsevier Science Ltd. All rights reserved
Annual estimations of ecophysiological parameters and biogenic volatile compounds (BVOCs) emissions in Citrus sinensis (L.) Osbeck
No full textChemical and physical interactions among trace gases (CH4, N2O, VOCs) contribute towards greenhouse effects. This paper by using a original simulation model analyses the annual trends of net photosynthesis, transpiration, and water use efficiency, the total primary production and finally the emission of monoterpenes from orange groves located in the Burriana plain (Spain). The net photosynthetic rate showed a bell-shaped trend with maximum average values of 3.5 mu molCO(2) m(-2) s(-1) calculated for the months of June and July. The canopy transpiration rate reached maximum values of approximately 2.5 mmolH(2)O m(-2) s(-1). Monoterpene emissions displayed a relevant increase during spring time reaching the highest values ol approximately 70 ng monoterpene m(-2) s(-1) during the summer period and a progressive decrease during the successive months. The loss of carbon by monoterpene emissions for the different plant organs is evaluated at approximately 0.404% of the total carbon fixed by photosynthesis (559.77 gC m(-2) y(-1)). On a fractionated basis the contribution of the leaves is 0.083% those of the fruits is 0.243% (for a period lasting from July to December), and only for the May period 0.079% for the flowers
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
René de Maulde, v.1880
No full textPortrait de René de Maulde (1852-?). Photographie Silli (13 quai Saint-Jean-Baptiste, Nice / boulevard National, Vichy), v.1880. Archives de Laprée, Quiestède, 5.P0103.16. Article révisé le 19/11/2019
Variations on the Author
No full text“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Report on the preliminary B.E.M.A. measuring campaign at Castelporziano, Rome (Italy), June 1993.
No full textServizi Ecosistemici e ruolo del verde nella rimozione del particolato atmosferico in aree metropolitane
No full textLa vegetazione urbana fornisce importanti servizi ambientali di natura ricreativa, estetico-paesaggistica e non ultimo funzionale, migliorando il microclima e contribuendo a ridurre l’inquinamento atmosferico. Il particolato (PM) rappresenta uno degli inquinanti maggiormente diffusi e ad elevato impatto ambientale e sanitario con particolare riguardo in ambito metropolitano (Direttiva 2008/50/CE, e Rapporto WHO 2011). Numerosi studi hanno confermato l’effetto di mitigazione da parte della vegetazione sulle concentrazioni di inquinanti atmosferici, con sensibile miglioramento della qualità ambientale. I risultati presentati fanno parte di ricerche condotte sia in contesto urbano che periurbano, all’interno di una villa storica di Roma, Villa Ada, nei giardini del Museo di Storia Naturale della città di Milano e nell’ambito della foresta mediterranea nella Tenuta Presidenziale di Castelporziano (Roma). Obiettivo della ricerca è stato quello di quantificare in aree urbane e periurbane la rimozione di PM atmosferico, da parte del verde presente in differenti aree campione, caratterizzate da vegetazione arborea o erbacea e a differenti altezze lungo la chioma degli alberi nella foresta urbana mediterranea. I risultati hanno evidenziato un abbattimento delle concentrazioni di PM all’aumentare della densità della vegetazione presente, confermando l’effetto sinergico esercitato dalla copertura arborea e da quella arbustiva, le cosiddette green barrier. Gli studi in corso contribuiranno a chiarire il ruolo effettivo del verde, nelle differenti tipologie e strutture, nel mitigare l’inquinamento atmosferico in aree metropolitane
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