Lake Minnetonka, located in southeastern Minnesota, U.S.A., is currently experiencing increased eutrophication due to excessive phosphorus (P) loading in runoff from agriculture and urban areas. This phenomenon has been exacerbated by the isolation of wetlands in the surrounding watershed from the surface water drainage network. In order to determine if rerouting surface water through these wet...

Several organic solvents (OSs) are potent carcinogens among population at risk. Their genotoxicity have important implications for cancer production. Genotoxicity could be related to lipid peroxidation with decrease of endogenous body antioxidants. This work included 27 car spray painters exposed to a mixture of mainly aromatic OSs and a comparable group of 27 males. For both groups, chromosoma...

We consider a version of the on-line graph coloring problem as a two person game. Players are called Spoiler and Painter. Spoiler reveals a graph by putting or removing a node. But at each time the total number of nodes on the board is bounded by previously fixed constant n. Painter must assign a color to any new node such that two nodes connected by an edge have different colors. He cannot cha...

The existence of blue straggler stars (BSSs) in dwarf spheroidal galaxies (dSphs) is still an open question. In fact, many BSS candidates have been observed in the Local Group dSphs, but it is unclear whether they are real BSSs or young stars. Shedding light on the nature of these BSS candidates is crucial, in order to understand the star formation history of dSphs. In this paper, we consider B...