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A method for direct electrothermal at. absorption spectrometric detn. of lead in wine is described. A mixed chem. modifier contg. 20 mg of tungsten as ammonium paratungstate and 4 mg palladium as palladium chloride is applied to thermally stabilize Pb in w ...
Multimedia fate and multipathway human,exposure models are widely adopted in assessments of toxicological risks of chemical emissions at the regional scale. This paper addresses the question of how much spatial detail is necessary in such models when estim ...
The very existence of urban formations on all inhabited continents and throughout the history of mankind since the 3rd millennium B.C. leads to suppose a tendency of some structured societies to maximize interaction by minimizing physical distance. Were th ...
Population growth is in general constrained by food production, which in turn depends on the access to water resources. At a country level, some populations use more water than they control because of their ability to import food and the virtual water requ ...
Increasing water scarcity has posed a major constraint to sustain food production in many parts of the world. To study the situation at the regional level, we took Iran as an example and analyzed how an intra-country "virtual water trade strategy" (VWTS) m ...
We model the dynamics of self-organized robot aggregation inspired by a study on aggregation of gregarious arthropods. In swarms of German cockroaches, aggregation into clusters emerges solely from local interactions between the individuals, whereas the pr ...
Population dynamics and food preferences of the testate amoeba species complex Nebela tincta major-bohemica-collaris (“Nebela collaris sensu lato”) were described from a Sphagnum peatland over one growing season. The average abundance of Nebela collaris se ...
Recurrent or ephemeral water shortages are a crucial global challenge, in particular because of their impacts on food production. The global character of this challenge is reflected in the trade among nations of virtual water, i.e. the amount of water used ...
