Ammonium and nitrate in ice accretions and snow at two Central European montane locations: δN and δ [Formula: see text] isotope ratios, fluxes and sources.

In many countries worldwide, NO emissions currently decrease as a result of pollution control, while NH emissions stagnate or continue to increase. Little is known about horizontal deposition of NO and NH, the oxidation/neutralization products of these primary pollutants. To close the knowledge gap, we studied atmospheric inputs of NO and NH at two mountain-top sites near the Czech-German-Polish borders during winter.

Challenges in moving towards fog's contribution to spatial patterns of atmospheric deposition fluxes on a national scale.

Fog is an important environmental phenomenon affecting, among other things, geochemical cycles via atmospheric deposition pathways. It is generally accepted that fog contributes substantially to atmospheric deposition fluxes especially in mountain forests. Nevertheless, due to intrinsic constraints, fog pathway has thus far been neglected in the quantification of atmospheric deposition and fog pathway has not been accounted for in nation-wide spatial patterns of atmospheric deposition of air pollutants.

Major ions in Central European precipitation - Insight into changes in NO/SO, NH/NO and NH/SO ratios over the last four decades.

Knowledge of precipitation composition is important, among other things, to reveal changes in atmospheric chemistry. Here we present the long-term time trends in ratios of major ions in precipitation, namely nitrate to sulphate (NO/SO), ammonium to sulphate (NH/SO) and ammonium to nitrate (NH/NO). For this we explore the long-term time series recorded by the Czech Hydrometeorological Institute at eight monitoring sites situated in urban, rural and mountain regions of the Czech Republic between 1980 and 2020.

Ambient ozone at a rural Central European site and its vertical concentration gradient close to the ground.

The representativeness of ambient air quality of an in situ measurement is key in the use and correct interpretation of the measured concentration values. Though the horizontal representativeness aspect is generally not neglected in air pollution studies, a detailed, high-resolution vertical distribution of ambient air pollutant concentrations is rarely addressed. The aim of this study is twofold: (i) to explore the vertical distribution of ground-level ozone (O) concentrations measured at four heights above the ground-namely at 2, 8, 50, and 230 m-and (ii) to examine in detail the vertical O concentration gradient in air columns between 2 and 8, 8 and 50, and 50 and 230 m above the ground.

Effect of Selected Factors Influencing Biogenic Amines Degradation by Isolated from Food.

Modern food technology research has researched possible approaches to reducing the concentration of biogenic amines in food and thereby enhance and guarantee food safety. Applying adjunct cultures that can metabolise biogenic amines is a potential approach to reach the latter mentioned goal. Therefore, this study aims to study the crucial factors that could determine the decrease in biogenic amines concentration (histamine, tyramine, phenylethylamine, putrescine and cadaverine) in foodstuffs using DEPE IB1 isolated from gouda-type cheese.