National Repository of Grey Literature 96 records found  1 - 10nextend  jump to record: Search took 0.08 seconds. 
The Effect of temperature treatment TiO2 nanoparticles on antibacterial properties
Bytesnikova, Z. ; Valeckova, V. ; Švec, P. ; Richtera, L. ; Šmerková, K. ; Vítek, Petr ; Adam, V.
The synthesis of TiO2 nanoparticles (NPs) under various temperature treatments was described and TiO2 NPs was subsequently tested as an antibacterial agent. Scanning electron microscopy (SEM), Raman spectroscopy, Dynamic light scattering (DLS) were used to confirm structure of TiO2 NPs and detect differences between individual batches treated with different temperature. Antibacterial properties were tested on Escherichia coli (E. coli). TiO2 NPs as photocatalyst was incubated with bacterial cells under ambient light. Changes in temperature treatment can affect diameter size and crystal structure of TiO2 NPs as well as its antibacterial properties.
Assessment of the Estimates of Sun-induced Fluorescence in large masses of Vegetation
Rodriguez-Moreno, Fernando ; Zemek, František ; Pikl, Miroslav
The remote estimation of the sun-induced fluorescence has been successful in fields in which, in addition to the measurements for the verification, there is also a detailed characterization\nof the atmosphere, besides being an optimal environment, flat surface without interferences. Revealing the fluorescence is a process of precision because the minimum error tolerated forces each element of the chain to fulfill its function exactly and consistently. The detailed monitoring of a flight line is not feasible, hence the uncertainty in this process and the reason for the series of publications with the new estimation of fluorescence.
Souhrnná výzkumná zpráva Aalto 1903
Hanuš, Jan ; Fabiánek, Tomáš ; Fajmon, Lukáš
Within the airborne hyperspectral campaign for a Finnish university Aalto University were scanned two locations - Hyytiälä (FI) - Järvselja (EST). The scanned processed data is used for other scientific purposes.\nAbstrakt: V rámci letecké hyperspektrální kampaňe pro Finskou univerzitu Aalto-yliopisto byly nasnímány dvě lokality - Hyytiälä (FI) - Järvselja (EST). Předaná zpracovaná data jsou používány pro další vědecké účely.
Souhrnná výzkumná zpráva Photomap - 2019
Hanuš, Jan ; Fabiánek, Tomáš ; Fajmon, Lukáš
The airborne hyperspectral campaign Photomap is focused on the acquisition of data for the study of long-term environmental damage.
Measurement of the vertical profile of the ground level of the atmosphere using an unmanned platform First results
Novotný, J. ; Bystrický, R. ; Dejinal, K. ; Trusina, Jan ; Komínková, Kateřina
Application of new technologies such as unmanned platforms is also on the rise in meteorology. The paper brings the first comparison of measurement sensors placed on the drone with standard meteorological measure-ments on the mast. The mast data provides continuous data over time, but not in space and only in five defined heights. The first results show a good match between mast measurements and measurements using a flying dron in wind direction and wind speed. Additional influences specific to the newly designed measurement method is the main problem, which must be solved.
The Influence of traditional ways of management on the State of Coppice - Results in 2018
Balková, M. ; Dařenová, Eva ; Friedl, M. ; Hloucalová, P. ; Kadavý, J. ; Kneifl, M. ; Knott, M. ; Kučera, A. ; Slach, T. ; Skládanka, J. ; Uchytilová, Tereza ; Uherková, B. ; Vichta, T. ; Volařík, D.
The most pronounced increase in number of herb species was remarked in the clear cut+litter gathering treatment. Harvest led to an increase in soil temperature and moisture. TheCO2efflux was the highest in September, namely in control treatment. The lowest intensity of root growth was remarked in the control treatment. Variants with litter gathering had smaller (28.9%) relative growth ratio.
DYNAMICS OF WINTER SEVERITY AND ITS EFFECT ON RECREATION
Zahradníček, Pavel ; Rožnovský, J. ; Brzezina, J. ; Štěpánek, Petr ; Farda, Aleš ; Chuchma, F.
Air temperature in winter months and colder half-year is an important factor for wide range of human activities, including recreation. As a result of current climate change, average air temperatures increase in winter as well. This, however, does not mean that there are no frosts. Each winter season can be assessed using several parameters. In this paper we used the sum of effective air temperatures below 0 degrees C and- 5 degrees C. Absolute minimum air temperature was used as an indicator of the extremity of a particular period. Space-time analysis has been performed for both parameters. Air temperatures in winter months are to a large extent influenced by the continentality of the climate. In general, the temperatures in Bohemia rise faster compared to Moravia and the absolute lowest minimum air temperatures are observed in the Western parts of the country. Based on a multiparametric analysis of climate characteristics, the coldest winter and colder half-year was in 1963, in contrast, the mildest winter was in 2007.
Methods of detection of fungal diseases applicable in plant phenotyping and remote sensing
Klem, Karel ; Veselá, Barbora ; Holub, Petr ; Urban, Otmar ; Mezera, J.
This methodology summarises findings from a comparison of three perspective methods of fungal disease detection applicable for remote sensing and plant phenotyping of fungal disease resistance. These methods are spectral reflectance, infrared thermal imaging, and blue-green fluorescence imaging. On the example of winter wheat infection with powdery mildew, stripe rust and brown rust the strengths and weaknesses of individual methods were demonstrated. From these results it is evident that all three methods are potentially applicable for non-destructive fungal disease detection, but their practical use may vary. Testing of spectral reflectance indices for the detection of fungal diseases showed particularly the high detection reliability of the red-edge and green band based spectral vegetation indices. Infrared thermal imaging has shown high detection accuracy for powdery mildew and brown rust, but lower for stripe rust. Blue-green fluorescence and thermal imaging seems to be also a very promising tools for evaluating the intensity and spatial distribution of infection on a leaf level.
Vulnerability analysis of climate change impacts in the city of Prague
Lorencová, Eliška ; Emmer, Adam ; Geletič, Jan ; Vačkář, David
Climate change is one of the key challenges of the 21st century, both in terms of adaptation as well as mitigation. The aim of this research was, following the Adaptation Strategy of the City of Prague, to prepare the background analysis for the Adaptation Action Plan, focusing on vulnerability assessment. The vulnerability asssessment focused on the climate change impacts related to: (i) temperature extremes - heatwaves, (ii) insufficient rainwater retention and extreme rainfall. The approach included spatially-specific analysis using ArcGIS based on climatic, land use and socio-economic indicators for the current status and future RCP 4.5 and RCP 8.5 scenarios. Regarding vulnerability to heatwaves, the most affected areas are located in the city center (Prague 2, Prague 3, Prague 6, Prague 7, Prague 1) and some peripheral areas with industrial buildings (e.g. Libeň or Štěrboholy). Vulnerability to extreme precipitation and insufficient rainwater retention was highest particularly at the confluence of the Vltava and Berounka (Velká Chuchle, Prague 16, Zbraslav and Lipence).
Research on inflence of SO2 and NOx on spruce growth
Hruška, Jakub ; Oulehle, Filip ; Kolář, Tomáš
Radial growth of Norway spruce (Picea abies) in Krušné and Jizerské Mts.responded qiuckly on the decline of SO2 and NOx emissions and S deposition. At the end of 1990´s it was equal to growh measured before the period of high emissions. The best correlation was founded with ambient SO2 concentrations, then with S atmosperic deposion and less important correlation was found with soil chemistry as it is correlated with deposition levels. At present there is no evidence of influence of SO2 and NOX on decline of radial growht. Observed decline in last decade is most probably attributed to climatic conditions.

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