1. Exchange of (3)H(2)O with H(2)O takes place rapidly in incubated rat brain slices but at a lower rate in slices from infant brain than from adult brain. The temperature coefficient (Q(10)) of the exchange process, between 37 and 4 degrees C, is 1.76 with infant brain and 1.26 with adult brain. The exchange process is unaffected by the presence of ouabain or 2,4-dinitrophenol. 2. An approxima...

[1] Using an estimated bicarbonate concentration ([HCO3 ]) in water and discharge rates of surface water and underground water from the Houzhai Basin, southwest China, from 1986 to 2007, we estimate that the mean carbon uptake rate was 20.7 g C m yr. The surface water and underground water contribute about equally to the total carbon uptake from 1986 to 2007. About 97% of the interannual variat...

Nitrogen fixing organisms such as Trichodesmium spp. are abundant in the oligotrophic tropical North Atlantic Ocean, where microplankton (including other diazotrophs) are more likely to be phosphorus (P) than nitrogen (N) limited. Thus, understanding the ability of different functional groups in the plankton to compete for P in this area is important for understanding their relative success. Th...

Four populations of Sedurn wrightii were studied with respect to their photosynthetic carbon metabolism. This leaf-succulent species exhibits crassulacean acid metabolism (CAM). Plants that possess CAM have the potential to vary their rates of transpirational water loss greatly in response to drought. Leaf thickness and biomass 6I3C values were measured in mid growing season for the populations...

Research goal: This article presents the results of a research project aimed at demonstrating effects and benefits using an organic ingredient, hydrogel (Hydro Start), to improve germination growth Paulownia tomentosa Cupressus sempervirens seedlings. Materials Methods: The experiments started in May 2022 were conducted CREA-OF greenhouses Pescia (PT) on seeded plants sempervirens. seeds placed...