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291.
Hugo D. Silva Marco T. A. García-Zapata Carlos E. Anunciação 《Food and environmental virology》2011,3(3-4):138-140
Adenovirus is the virus that contains the highest amount of features favorable to its use as a virologic marker for water quality. Those pathogens are resistant on the environment, abundant, easily detected by molecular methods and are of great importance in public health. 相似文献
292.
293.
Robert Blanchard Detlef Arndt Rainer Grätz Marco Poli Swen Scheider 《Journal of Loss Prevention in the Process Industries》2010,23(2):253-259
There is a general lack of information on the effects of full-bore obstacles on combustion in the literature, these obstacles are prevalent in many applications and knowledge of their effects on phenomena including burning rate, flame acceleration and DDT is important for the correct placing of explosion safety devices such as flame arresters and venting devices. In this work methane, propane, ethylene and hydrogen–air explosions were investigated in an 18 m long DN150 closed pipe with a 90 degree bend and various baffle obstacles placed at a short distance from the ignition source. After carrying out multiple experiments with the same configuration it was found that a relatively large variance existed in the measured flame speeds and overpressures, this was attributed to a stochastic element in how flames evolved and also how they caused and interacted with turbulence to produce flame acceleration. This led to several experiments being carried out for one configuration in order to obtain a meaningful average. It was shown that a 90 degree bend in a long tube had the ability to enhance flame speeds and overpressures, and shorten the run-up distance to DDT to a varying degree for a number of gases. In terms of the qualitative effects on these parameters they were comparable to baffle type obstacles with a blockage ratios of between 10 and 20%. 相似文献
294.
Marco Ferrante Francesco Napolitano Lucio Ubertini 《Journal of the American Water Resources Association》2000,36(5):1115-1120
ABSTRACT: In this paper a numerical model for flood propagation in urban areas is proposed. It has been applied to evaluate flooding hydraulic characteristics in terms of potential flood elevations, depths, and inundated areas. Furthermore, the algorithm efficiency and the consequent reduced computation time allow the use of the hydraulic model as a part of a more complex system for civil protection actions, planning, and management. During flood events, the transportation network plays a main role both in rescuing people when they are more vulnerable and in moving people and materials from and toward affected areas. The reduced efficiency of this transportation network is evaluated based on a least‐flood‐risk path‐finding algorithm. The results of a case study concerning the northern part of the city of Rome, show that the numerical model for unsteady flow in open channel networks achieves the proposed aims. It has proven to be able to describe the flood hydraulic characteristics and to be suitable for real‐time flood emergency management in urban areas. 相似文献
295.
Martin Graeve Marte Lundberg Marco Böer Gerhard Kattner Haakon Hop Stig Falk-Petersen 《Marine Biology》2008,153(4):643-651
Lipids of the Arctic ctenophore Mertensia ovum, collected from Kongsfjorden (Svalbard) in 2001, were analysed to investigate seasonal variability and fate of dietary lipids.
Total lipids, lipid classes and fatty acid and alcohol compositions were determined in animals, which were selected according
to age-group and season. Changes in lipids of age-group 0 animals were followed during growth from spring to autumn. Total
lipids increased from May to September. Lipids as percentage of dry mass were lowest in August indicating their use for reproduction.
Higher values occurred in September, which may be due to lipid storage for overwintering. Wax esters were the major lipid
class accounting for about 50% of total lipids in age-group 0 animals from July and August. Phospholipids were the second
largest lipid fraction with up to 46% in this age-group. The principal fatty acids of M. ovum from all age-groups were 22:6(n-3), 20:5(n-3) and 16:0. Wax ester fatty alcohols were dominated by 22:1(n-11) and 20:1(n-9)
followed by moderate proportions of 16:0. The unique feature of M. ovum lipids was the high amount of free fatty alcohols originating probably from the dietary wax esters. In May, free alcohols
exhibited the highest mean proportion with 14.6% in age-group 0 animals. We present the first data describing a detailed free
fatty alcohol composition in zooplankton. This composition was very different from the alcohol composition of M. ovum wax esters because of the predominance of the long-chain monounsaturated 22:1(n-11) alcohol accounting for almost 100% of
total free alcohols in some samples. The detailed lipid composition clearly reflected feeding of M. ovum on the herbivorous calanoid species, Calanus glacialis and C. finmarchicus, the abundant members of the zooplankton community in Kongsfjorden. Other copepod species or prey items seem to be less important
for M. ovum. 相似文献
296.
Marco Antonio Leonel Caetano Douglas Francisco Marcolino Gherardi Takashi Yoneyama 《Ecological modelling》2008
In recent years, the world has witnessed an ever-growing concern towards global warming caused by greenhouse gases, such as carbon dioxide (CO2). In order to reduce the emissions of CO2 without limiting economic growth, substantial investments should target the development of clean technology and the expansion of forested areas. Considering the limited availability of resources, investments must be used in the most effective way. The present work proposes a method to efficiently manage these resources by applying the optimal control theory to a new mathematical model that describes the dynamics of the atmospheric CO2. The contributions of this work are twofold: (1) present a model that describes the dynamic relation of CO2 emission with investment in reforestation and clean technology and (2) present a method to efficiently manage the available resources by casting an optimal control problem. The mathematical model uses ordinary differential equations to relate the production of CO2 with forest area and Gross Domestic Product (GDP). The model parameters are adjusted to fit the actual published data. Given an appropriate performance index, the optimal solution is found by numerically solving the Two-Point Boundary Value Problem (TPBVP) that arises from the application of Pontriagyn's Maximum Principle. The sensitivity of the obtained numerical solution is evaluated with respect to the uncertainties in the model parameters. The main objective of this work is to provide a quantitative tool for the efficient allocation of resources to reduce the greenhouse effect caused CO2 emissions. 相似文献
297.
Russo Fabiana Ceci Andrea Maggi Oriana Siciliano Antonietta Guida Marco Petrangeli Papini Marco Černík Miroslav Persiani Anna Maria 《Environmental science and pollution research international》2019,26(24):24445-24461
Environmental Science and Pollution Research - The study of the soil microbial community represents an important step in better understanding the environmental context. Therefore, biological... 相似文献
298.
Cutroneo Laura Reboa Anna Besio Giovanni Borgogno Franco Canesi Laura Canuto Susanna Dara Manuela Enrile Francesco Forioso Iskender Greco Giuseppe Lenoble Véronique Malatesta Arianna Mounier Stéphane Petrillo Mario Rovetta Ruben Stocchino Alessandro Tesan Javier Vagge Greta Capello Marco 《Environmental science and pollution research international》2020,27(9):8938-8952
Environmental Science and Pollution Research - The European Interreg Italy–France 2014–2020 Maritime Project SPlasH! (Stop to Plastics in H2O!) focused on the study of microplastics... 相似文献
299.
Henne Paul D. Bigalke Moritz Büntgen Ulf Colombaroli Daniele Conedera Marco Feller Urs Frank David Fuhrer Jürg Grosjean Martin Heiri Oliver Luterbacher Jürg Mestrot Adrien Rigling Andreas Rössler Ole Rohr Christian Rutishauser This Schwikowski Margit Stampfli Andreas Szidat Sönke Theurillat Jean-Paul Weingartner Rolf Wilcke Wolfgang Tinner Willy 《Regional Environmental Change》2018,18(1):205-221
Regional Environmental Change - Planning for the future requires a detailed understanding of how climate change affects a wide range of systems at spatial scales that are relevant to humans.... 相似文献
300.
Khaniabadi Yuef Omidi Fanelli Roberto De Marco Alessandra Daryanoosh Seyed Mohammad Kloog Itai Hopke Philip K. Conti Gea Oliveri Ferrante Margherita Mohammadi Mohammad Javad Babaei Ali Akbar Basiri Hassan Goudarzi Gholamreza 《Environmental science and pollution research international》2017,24(20):16860-16868
Environmental Science and Pollution Research - The main objective of this study was to assess the possible effects of airborne particulate matter less than 10 μm in diameter (PM10)... 相似文献