Generally, elevated temperature and higher nutrient levels caused an

increase in the bacterial growth rate and a shortening of the response time (lag phase). However, at the lowest nutrient concentration, bacterial growth was low at all tested temperatures, find more implying a stronger dependence on resource availability than on temperature for bacterial growth. Furthermore, data indicated that different bacterial assemblages had varying temperature responses and that community composition was strongly affected by the combination of high nutrient addition and high temperature. These results support the concern that climate change will promote heterotrophy in aquatic systems, where nutrient levels will increase considerably. In such environments, the bacterial community composition will change, their growth rates will increase, and their response time will be shortened compared to the present situation.”
“A high minority carrier effective lifetime tau(eff) of crystalline silicon was achieved by hydrogenated amorphous silicon (a-Si: H) films formed by a combination of plasma-enhanced chemical vapor deposition at 150 degrees C with high-pressure H2O vapor heat treatment. tau(eff) was 1.6 x 10(-4), 3.0 x 10(-4), and 1.15 x 10(-3) s for n-type silicon

substrates click here coated with 3-, 10-, and 50-nm-thick a-Si:H films treated with 1.0 x 10(6) Pa H2O vapor heat treatment between 180 and 300 degrees C for 1 h. Light-induced passivation enhancement was demonstrated when 620-nm light was illuminated at the 50-nm-thick a-Si:H surface. tau(eff) increased from 8.5 x selleck products 10(-4) to 1.15 x 10(-3) s probably caused

by field effect passivation induced by hole trapping at the SiOx formed by H2O vapor heat treatment for 1 h. On the other hand, tau(eff) was further increased to 1.2 x 10(-3) s by 1.0 x 10(6) Pa H2O vapor heat treatment at 300 degrees C for 3 h for the sample formed with the 50-nm-thick a-Si:H film. However, no increase in tau(eff) was observed by light illumination at the a-Si: H surface, probably because the SiOx clusters became stable and had no hole trapping property. (C) 2012 The Japan Society of Applied Physics”
“It is still unknown what exact role interspecific gene flow and reticulate patterns of gene transfer may play in adaptive radiations. To contribute to a better understanding of gene flow in a morphologically diverse and species-rich lineage, we investigated pollen transfer in the adaptively radiated Macaronesian Crassulaceae-Sempervivoideae. We aimed at comparing pollinator spectra and pollen transfer rates among sympatric species of Aeonium. Field studies were conducted on Tenerife (Canary Islands) including pollinator observations and estimations of pollen transfer using fluorescent dye powder as pollen analogue. Our results indicate an overlap in visiting insects among four sympatric species pairs of Aeonium.