Fractionation of carbon isotopes in oxygenic photosynthesis Calvin cycle during the day, when stomata are closed to prevent water loss, and the light reactions can drive the necessary ATP and NADPH production. This pathway differs from C4 photosynthesis because CAM plants separate carbon by storing fixed CO in vesicles at night, then transporting it for use during the day. Thus, CAM plants temporally concentrate CO to improve Rubsico efficiency, whereas C4 plants spatially concentrate CO in bundle sheath cells. The distribution of plants which use CAM photosynthesis includes epiphytes (e.g., orchids, bromeliads) and xerophytes (e.g., succulents, cacti). In Crassulacean acid metabolism, isotopic fractionation combines the effects of
What You Need from Me What You Need from Me "What You Need From Me" is a duet recorded by Welsh singer Bonnie Tyler and American singer-songwriter Vince Gill, taken from Tyler's sixteenth studio album and the 4th track of the album, "Rocks and Honey" (2013). The song was composed by American country singer-songwriters Jon Randall and Jessi Alexander and presented to Bonnie Tyler and her manager when they visited Nashville in 2011 searching for new material from music publishers. After hearing a demo of the song, Tyler said that she would prefer to sing the song as a duet, and approached Vince Gill to