59 research outputs found
Delineation of the Pannonian vegetation region
Phytogeographical regions have been set up traditionally on the basis of the flora. Several examples indicate that the potential natural vegetation is also suitable for this purpose although the flora- and vegetation-based boundaries do not necessarily overlap. We define a vegetation region as an area where the physical geographic features are rather uniform, and which consists of landscapes with floristically/structurally similar vegetation and/or their repetitive mosaics. In this paper, we delimited the boundaries of the Pannonian region based on the distribution of characteristic plant communities. The line runs most often on the border between Quercus cerris-Quercus petraea and Carpinus betulus/Fagus sylvatica dominated landscapes. We provided descriptions of the potential vegetation on both sides of the boundary. The region has an area of 167,012 km2. The region is either in direct contact with the neighboring regions (e.g., Western Carpathians), or is separated from them by transitional areas (towards the Eastern Alps), and character-poor areas with non-Pannonian, non-Alpine, non-Dinaric vegetation (in the southwest to the Western Balkan). Often, the boundary does not coincide with the boundary of the Pannonicum floristic province. We found that vegetation region boundaries can help reevaluate long-established floristic region boundaries. The boundary of the ’floristic Pannonian region’ also requires revision based on integrated distribution databases and statistical analyses. We argue that the method applied here is simple, repeatable and falsifiable. Our map provides an opportunity to the European Union to use a scientifically more sound biogeographical circumscription of the Pannonian region in her Natura 2000 and other programs
Difference between transformed and spontaneous revertant strains of Neurospora crassa
Difference between transformed and spontaneous revertant strains of Neurospora crass
Neural Cell Response to Nanostructured Biosensor Surfaces
AbstractIn our work we investigate the interaction of cells and nanotextured surfaces as a model of implanted device surface and living tissue interaction. We developed a maskless nanostructuring method, which can be integrated into our neural biosensor fabrication process. Morphology of the fabricated nanograss was characterised using SEM. The nanorods are 520-800nm in height and their density is 18-70/μm2. Electrochemical impedance spectroscopy and contact angles of different surfaces were measured. The specific surface area is 30 times larger than the reference. The contact-angle can be tuned. The samples will be tested in viability and adhesion assays using neural cell cultures
Combined in vivo recording of neural signals and iontophoretic injection of pathway tracers using a hollow silicon microelectrode
Valproate treatment normalizes EEG functional connectivity in successfully treated idiopathic generalized epilepsy patients
Application of a flexible polymer microECoG array to map functional coherence in schizophrenia model
Effect of different weaning age (21, 28 or 35 days) on production, growth and certain parameters of the digestive tract in rabbits
The effect of different weaning ages, that is, 21 (G21), 28 (G28) or 35 (G35) days, on growth and certain parameters of the
digestive tract was examined in rabbits to assess the risk of early weaning attributable to the less-developed digestive system.
On days 35 and 42, G35 rabbits had 10% to 14% and 10% higher BW, respectively ( P,0.05), than those weaned at days 21 and
28. In the 4th week of life, early weaned animals had 75% higher feed intake than G28 and G35 rabbits ( P,0.05). The relative
weight of the liver increased by 62% between 21 and 28 days of age, and thereafter it decreased by 76% between 35 and
42 days of age ( P,0.05), with G21 rabbits having 29% higher weight compared with G35 animals on day 35 ( P,0.05).
The relative weight of the whole gastrointestinal (GI) tract increased by 49% and 22% after weaning in G21 and G28 rabbits,
respectively ( P,0.05). On day 28, the relative weight of the GI tract was 19% higher in G21 than in G28 rabbits, whereas on day
35 G21 and G28 animals had a 12% heavier GI tract compared with G35 rabbits ( P,0.05). Age influenced the ratio of stomach,
small intestine and caecum within the GI tract; however, no effect of different weaning age was demonstrated. The pH value of
the stomach and caecum decreased from 5.7 to 1.6 and from 7.1 to 6.3, respectively, whereas that of the small intestine increased
from 6.8 to 8.4 ( P,0.05); the differences between groups were not statistically significant. Strictly anaerobic culturable bacteria
were present in the caecum in high amounts (108), already at 14 days of age; no significant difference attributable to weaning age
was demonstrable. The concentration of total volatile fatty acids (tVFA) was higher in G21 than in G28 and G35 throughout the
experimental period ( P,0.05). The proportion of acetic and butyric acid within tVFA increased, whereas that of propionic acid
decreased, resulting in a C3 : C4 ratio decreasing with age. Early weaning (G21) resulted in higher butyric acid and lower propionic
acid proportions on day 28 ( P,0.05). No interaction between age and treatment was found, except in relative weight of the GI
tract and caecal content. In conclusion, early weaning did not cause considerable changes in the digestive physiological
parameters measured, but it resulted in 10% lower growth in rabbits
Electrophysiological and behavioral properties of 4-aminopyridine-induced epileptic activity in mice
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