The quantum yield for CO 2 uptake was measured in C3 and C4 monocot species from several different grassland habitats. When the quantum yield was measured in the presence of 21% 02 and 340cm 3 m -3 CO2, values were very similar in C3 monocots, C3 dicots, and C 4 monocots (0.045-0.056 mole CO 2 β’ mol
Implications of quantum yield differences on the distributions of C3and C4grasses
β Scribed by James R. Ehleringer
- Publisher
- Springer-Verlag
- Year
- 1978
- Tongue
- English
- Weight
- 820 KB
- Volume
- 31
- Category
- Article
- ISSN
- 0029-8549
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## Abstract Quantum Monte Carlo and a series of other ab initio as well as density functional theory calculations were performed for the enthalpy of formation of C~4~H~3~ and C~4~H~5~ radicals. The computed Ξ~f~H~298~^0^ values, in kcal/mol, are 126.0 for __n__βC~4~H~3~, 119.4 for __i__βC~4~H~3~, 8