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1
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

The material cycles of biomass and the energy flow in Hungarian agriculture

100%
Nagy A.
Zeszyty Problemowe Postępów Nauk Rolniczych
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1989
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tom 378
Agriculture is essentially an energy conversion process - the conversion of solar energy through photosynthesis to biomass. The problem with solar radiation is that it is diffuse, intermittent and has a low energy flux, so that if we are going to use it, we have to collect this energy, convert to a form convenient for our purposes, and also need to store it - this is what plants solved a long time ago. The primary goal of agriculture is to produce food for humans in the form of a balanced diet. To realize this goal in a modern agriculture with high productivity we use fossil energy subsidy together with a complex mix of science and technology. Fossil energy INPUT in agriculture can be applied directly, as fuels and electricity, and indirectly, as invested energy of fertilizers, pesticides, irrigation, machinery or buildings, all of which depend primarily upon fossil energy. Now, the total fossil energy INPUT, e.g. in maize production per hectare in the growing season averages about 450 1 of oil equivalents. But this represents only 8% of the total solar energy captured by the plant.
2

The synthesis of system-analyses in the development of rural areas

51%
Kaposzta J., Goda P., Nagy H., Nagy A.
Roczniki Ekonomii Rolnictwa i Rozwoju Obszarów Wiejskich
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2012
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tom 99
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nr 3
We often face the question how a development strategy can be maintained. What sustainability means and is there a general approach which is able to describe these condition systems in any region or community of a country. Each area has different physical and mental characteristics and one certain development concept may be applied in one country but the same concept causes damages to the other (and it can be true even for the different regions and communities of one country). Our paper outlines general guidelines that are suitable for describing complex problems. The development of rural areas can be defined as an interdisciplinary field of science synthetizing more scientific fields and built from different approaches due to its complexity. These approaches often have system theory roots and their overall review is required very much.
3

Push and reach related neuronal activity in the posterior parietal cortex and the superior colliculus of the primate brain

51%
Hoffmann K. P., Nagy A., Rottmann S., Kruse W.
Acta Neurobiologiae Experimentalis
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2005
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tom 65
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nr 5
4
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

The role of tourism in rural areas of Hungary

51%
Nagy A., Kaposzta J., Csonka T.
Roczniki Naukowe Stowarzyszenia Ekonomistów Rolnictwa i Agrobiznesu
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2013
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tom 15
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nr 5
Studied by many researchers, tourism has become a major income-generating sector of the economy. Tourism often creates potential and acts as an engine of local economic development for many rural areas however, it is not established in all areas. The utilization of tourism potential in rural areas is sometimes considered to be the “only and last resort” to generating economic growth, even though it is frequently not enough to solve long-lasting and serious problems existing in such areas. Thus, when developing the sector, it is necessary to examine the conditions of a given area. The aim of this study is to discover the touristic possibilities of rural areas and, with the application of certain indicators, quantify and define the long-term potentials of the sector.
5
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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The development prospects of rural areas in the least-developed regions of Hungary

51%
Nagy H., Kaposzta J., Kollar K., Nagy A.
Roczniki Naukowe Stowarzyszenia Ekonomistów Rolnictwa i Agrobiznesu
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2011
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tom 13
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nr 6
The actuality of our topie is established and justified by the fact that the cohesion policy of the European Union is criticized very much nowadays. In our opinion, the criticism primarily focuses on the low efficiency of the use of EU funds and the increasing gap between the regions. It was mentioned even at the 2010 Open Days events in Brussels that the distribution system of funds in the Union is not perfect, but the current principles, system and the eligibility criteria have to be maintained. The strengthening of the Community and its cohesion policy is one of the priority tasks for the Hungarian EU presidency as they will get more importance due to the future enlargements.
6

Speed tuned cells in feline superior colliculus

45%
Waleszczyk W. J., Nagy A., Eordegh G., Wypych M., Benedek G.
Acta Neurobiologiae Experimentalis
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2003
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tom 63
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nr 5
7

A new method for identification of modulation in neural responses to drifting grating stimulation

39%
Wypych M., Nagy A., Paroczy Z., Markus Z., Berenyi A., Benedek G., Waleszczyk W.
Acta Neurobiologiae Experimentalis
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2009
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tom 69
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nr 3
Temporal modulation of responses to drifting grating stimulation is observed in visual neurons in different brain structures. The common measure of intensity of such modulation is the modulation index (MI; Movshon et al. 1978), defi ned as the ratio of the amplitude of the response component at the stimulus temporal frequency (f1 ) and the net response of the cell. However MI works correctly in a limited range of net responses. If stimulation causes only a weak change in mean fi ring rate, MI can take any value independently of actual modulation in the response. Here we present a new, simple method of determining the strength of modulation, based on the detection of a peak in an amplitude spectrum at the frequency of stimulation. We defi ne modulation strength (MS) as the ratio of f1 value above the mean value of amplitude spectrum and standard deviation (SD) of amplitude values along all frequencies in the spectrum. We assume the response to be modulated if f1 value exceeds the mean amplitude by at least one SD (MS>1). We test the method on data recorded from a number of structures of the extrageniculate visual pathway and compare it to the classical MI and the modulation depth (measure used in the amplitude modulation radio transmission – here the change of the spectrum component at the stimulation frequency between the spontaneous activity and the response). Supported by MNiSW grants: N303 070234, COST/127/2007, N303 046 31/1483, OTKA/NKTH Hungary grant 68594, OTKA grant PD75156.
8
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Etiology and pathology of epidemic outbreaks of avian influenza H5N1 infection in Egyptian chicken farms

33%
Ali A., Elmowalid G., Abdel-Glili M., Sharafeldin T., Abdallah F., Mansour F., Nagy A., Ahmed B., Abdelmoneim M.
Polish Journal of Veterinary Sciences
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2015
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tom 18
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nr 4
Epidemic outbreaks of avian influenza (AI) virus H5N1 have been frequently reported in Egypt during the last nine years. Here we investigate the involvement of AI H5N1 in outbreaks of acute respiratory disease that occurred in several commercial chicken farms in Egypt in 2011, and we describe to the pathology caused by the virus in the course of the outbreak. Twenty-one chicken farms with history of acute respiratory symptoms and high mortalities were screened for AI H5N1. Virus identification was based on hemagglutination inhibition test, and PCR detection and sequencing of the hemagglutinin and neuraminidase genes. Virus distribution was determined by immunohistochemical staining of AI antigens in organs of infected birds. Standard H&E staining was performed for histological examination of affected organs. Eighty-one % of the examined birds, representing 100% of the screened farms, were positive for AI H5N1 virus. Phylogenetic analysis of the hemagglutinin and neuraminidase genes of the isolated virus reveals its affiliation to clade 2.2.1. Viral antigens were localized in the endothelial cells of the heart, liver, lungs and skin, where pathological lesions including congestion, hemorrhages, multifocal inflammation and necrosis were concurrently observed. According to the pattern of the viral antigen and lesion distribution in the visceral organs, we suggest cardiovascular and circulatory failures as the probable cause of death during these outbreaks. In conclusion, the present study further confirms the epidemic status of AI H5N1 virus in Egypt and reveals the highly pathogenic nature of the local isolates.
9
Content available remote

Hepatic and systemic effects of rosuvastatin on an experimental model of bile duct ligation in rats

33%
Olteanu D., Nagy A., Dudea M., Filip A., Muresan A., Catoi C., Mircea P. A., Clichici S.
Journal of Physiology and Pharmacology
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2012
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tom 63
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nr 5
10
Content available remote

Immunomodulatory and potential therapeutic role of mesenchymal stem cells in periodontitis

33%
Racz G. Z., Kadar K., Foldes A., Kallo K., Perczel-Kovach K., Keremi B., Nagy A., Varga G.
Journal of Physiology and Pharmacology
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2014
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tom 65
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nr 3
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