Beérkezett könyvek

Fehér Márta és Békés Vera (szerk.): Tudásszociológia szöveg­gyűjtemény. Typotex, Budapest, 2005 Ralph W. Moss: Szent-Györgyi Albert. (Fordította: Bakács Tibor) Typotex, Budapest,  2004 Schiller Róbert: Egy kultúra között. Typotex, Budapest, 2004 Laki János: A tudomány természete. Thomas Kuhn és a tudomány­filozófia történeti fordulata. Gondolat Kiadó, Budapest, 2006 Mosoniné Fried Judit és Tolnai Márton (szerk.): A tudományon kívül és belül. Tanulmányok a társadalom és a tudomány kapcsolatáról. MTA KSZI, Budapest, 2005 Kertész András és Pelyvás Péter (szerk.): Tanulmányok a kognitív szemantika köréből. Általános Nyelvészeti Tanulmányok. XXI. Akadémiai Kiadó, Budapest, 2005 James A. Anderson: A kommunikációelmélet ismeretelméleti alapjai. (Fordította: Wil­helm Gábor) Typotex, Budapest, 2005 Jean-François Rouet: Cent fenêtres sur l'internet. Atlantique, Poitier, 2005 Ivaskó Lívia (szerk.): Érthető kommunikáció. SZTE Médiatudományi Tanszék, Szeged, 2005 Johan Goudsblom: Időrezsimek.Typotex, Budapest, 200

Neurotoxic and general effects of combined subchronic exposure of rats to insecticides and heavy metals

Three different insecticides: dimethoate, cypermethrin and amitraz were given, alone or combined with the heavy metals Pb, Hg and Cd, to male Wistar rats per os for 12 weeks from their 4th week of life. After the treatment period, the left hemisphere of the rats was exposed in urethane anaesthesia, and spontaneous and evoked cortical activity was recorded from the primary sensory areas. The effects of dimethoate on the spontaneous activity, and of dimethoate and amitraz on the evoked responses, were increased by the metal combination treatment, whereby the metals alone had no effect on the spontaneous and mild effect on the evoked activity. Finally, the animals were dissected, organ weights measured, and relative organ weights calculated. The weight gain of all treated groups was significantly retarded compared to the control. Several organ weights were also significantly reduced, mainly in groups receiving insecticide plus metal treatment. The toxic interactions observed in this work indicate that combined human exposure to environmental pesticide residues and heavy metals may have unexpectedly severe effects

Hyperspectral Technology in Vegetation Analysis

The objective of the work reported is the development of red-edge methodology in order to characterize agricultural vegetation types and the determination of relationships between different vegetation (high biomass, low biomass) and thermal images. Therefore, the aim was to calculate red-edge position (REP) values and compare them to traditional vegetation indices (NDVI) and thermal images. Images were taken by a DAIS 7915 airborne imaging spectrometer that was equipped with an additional thermal imaging system. An exponential relationship was found between the on-curve-evaluation based (REP) and the broad band vegetation indices (NDVI). A linear relationship was determined between surface temperature differences (ΔTs) of the vegetation and NDVI values. A logarithmic relationship was found between surface temperature differences (ΔTs) of the vegetation of the canopy and red-edge position (REP). NDVI and REP are suitable vegetation indices when there are several bands available in the spectral range of 600-800 nm. REP was found to be a suitable method for analyzing and characterizing vegetated surfaces