Fractionation of carbon isotopes in oxygenic photosynthesis values more similar to C3 plants. In contrast to terrestrial plants, where CO diffusion in air is relatively fast and typically not limiting, diffusion of dissolved CO in water is considerably slower and can often limit carbon fixation in phytoplankton. As gaseous CO is dissolved into aqueous CO, it is fractionated by both kinetic and equilibrium effects that are temperature-dependent. Relative to plants, the dissolved CO source for phytoplankton can be enriched in C by about 8‰ from atmospheric CO. Isotope fractionation of C by phytoplankton photosynthesis is affected by the diffusion of extracellular aqueous CO into the cell, the
What I Do What I Do What I Do is the twelfth studio album by American country music artist Alan Jackson. It was released on September 7, 2004, and produced four singles for Jackson on the Hot Country Songs charts: "Too Much of a Good Thing" and "Monday Morning Church" both reached #5, while "The Talkin' Song Repair Blues" and "USA Today" both reached #18. "What I Do", however, was the first album of his career not to produce any #1 hits. The Wrights, a duo composed of Adam and Shannon Wright (the former of whom is Jackson's nephew) are featured as background