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Bucharest, Romania

Popa D.,University of Craiova | Hanescu V.,University of Craiova | Constantin C.,ICPA | Codreanu M.,USAMV
Journal of Environmental Protection and Ecology | Year: 2010

As a result of some studies performed by the research team from the discipline of Microbiology, University of Craiova - Romania concerning the process of stabilising the dumps of slag and ashes through populating them with species of horticultural plants suitable to the mycorrhizal relationships, it was pointed out the fact that the mycorrhizal process is representing a critical factor in the minerals cyclic process. Another aspect is concerning the permanent change of the mycorrhizal fungi species, of the host plant species (cultivated and invading ones) and of the physicochemical features of the ashes dumps - functioning as substrate. The mycorrhizal plants had a faster growth; their vigurousity was translated into the biomass multiplication above 70%, comparing with the non-mycorrhizal vegetation. The presence of some disturbances within the mycorrhizal plants cultivated on the plateau of the dump was possible by maintaining the mono-cultures and modifying the plants species composition, the mycorrhizae types and mycorrhizal fungi species being the main factors for assuring the perenity of the vegetation. Source

International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM | Year: 2013

Significant floods all over the world, including Romania and Bulgaria, have occurred in the last years as result of climate change and extreme meteorological phenomena manifestation. Overland flooding, the most common type of flooding event usually occurs when rivers or streams overflow their banks as a result of heavy rainfalls or fast snowmelt. In European Union, flood defence management is an essential part of the integrated water management and the European Commission Directive 2007/60, regarding the estimation and management of the flood risks, states that all the member countries have to achieve flood risks maps till the end of 2013. Flood hazard maps must be created to help the communities in finding out which are the different flood risk areas and to provide public awareness and useful information to local authorities and decisions makers in case of possible flood events. Flood risk areas should be also identified and delimited for future land use and development. The development of risk maps assumes the existence and access to extensive databases, detailed maps and GIS data depots for most of the necessary information, as well as expensive software (i.e. ArcGIS, MIKE) and skilled experts. Unfortunately, these criteria are not always met. This paper presents an alternative method to prepare preliminary floodplain maps, based on the use of Autodesk products and Open Source software. The purpose of the method is to introduce basic satellite image display and processing techniques using open source software and freely available satellite data to allow floodplain maps development without using expensive software and unaffordable data. The method consists in DTM (Digital Terrain Model) generation, rivers and watershed delineation and hydraulic modelling in order to generate floodplain maps. © SGEM2013 All Rights Reserved by the International Multidisciplinary Scientific GeoConference SGEM. Source

Frasineanu C.,Academy of Economic Studies Bucharest | Chiurciu I.A.,USAMV | Stamate V.,INMA
INMATEH - Agricultural Engineering | Year: 2013

Environmental protection is of major importance because economic development takes place in the natural environment in which we are existing and working. According to the Environmental Protection Law 137/1995, pollution is the direct or indirect introduction, as a result of activities carried out by humans, of substances in soil or air that can harm human society and environment quality. Pollutants can be characterized according to the source, the aggregation, of changes determined. Among the elements that characterize a pollutant analyzed through its interactions with the environment, the most important are the maximum permissible concentration, degree of persistence and synergy effects that trigger when they are together with other pollutants. This article presents the optimal level of pollution reduction and of losses in correlation with the benefits and the costs of implementing. © 2013. Source

International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM | Year: 2014

Demand for the world's increasingly water supply is rising rapidly, challenging its availability for food production and putting global food security at risk. This aspect combined with climate change determine people to focus on all possibilities to obtain and preserve fresh water resources. In this context, data regarding evapotranspiration on earth, as significant part of water cycle in nature, are extremely valuable and important to know. This paper presents a way to create evapotranspiration maps for large territories, using remote sensed data collected by satellite, analyzed and processed with an improved algorithm, by a specialized toolbox, capable to be integrated in ArcGIS. The theoretically approach and results of the methodology are illustrated using the generation of Bulgarian evapotranspiration map as example. © SGEM2014. Source

Calmes B.,University of Angers | Calmes B.,French National Institute for Agricultural Research | Calmes B.,Agrocampus Ouest | Guillemette T.,University of Angers | And 16 more authors.
Frontiers in Plant Science | Year: 2013

In this study, the physiological functions of fungal mannitol metabolism in the pathogenicity and protection against environmental stresses were investigated in the necrotrophic fungus Alternaria brassicicola. Mannitol metabolism was examined during infection of Brassica oleracea leaves by sequential HPLC quantification of the major soluble carbohydrates and expression analysis of genes encoding two proteins of mannitol metabolism, i.e., a mannitol dehydrogenase (AbMdh, and a mannitol-1-phosphate dehydrogenase (AbMpd. Knockout mutants deficient for AbMdh or AbMpd and a double mutant lacking both enzyme activities were constructed. Their capacity to cope with various oxidative and drought stresses and their pathogenic behavior were evaluated. Metabolic and gene expression profiling indicated an increase in mannitol production during plant infection. Depending on the mutants, distinct pathogenic processes, such as leaf and silique colonization, sporulation, survival on seeds, were impaired by comparison to the wild-type. This pathogenic alteration could be partly explained by the differential susceptibilities of mutants to oxidative and drought stresses. These results highlight the importance of mannitol metabolism with respect to the ability of A. brassicicola to efficiently accomplish key steps of its pathogenic life cycle. © 2013 Calmes, Guillemette, Teyssier, Siegler, Pigné, Landreau, Iacomi, Lemoine, Richomme and Simoneau. Source

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