Spectral photon fluence rate

I. In reference to a spectral feature, the scalar or magnitude of that feature. 2. Chromatic purity. 3. The magnitude of a particular force or energy per unit (e.g., surface, charge, mass, time, volume, etc.). 4. Synonym for photon irradiance. 5. Synonym for fluence rate. 6. Synonym for irradiance illuminance. 7. Synonym for radiant power. 8. Symbohzed by /, synonym for radiant intensity. 9. See Magnetic Field Strength. 10. See Electric Field Strength. 

From an energy point of view, the photosynthetic microorganisms disregard the direction of the incident photons. Then, instead of considering the directional intensity Ix r,s), it is more appropriate to use the local spectral fluence rate G i(r) defined as the irradiance incident from all directions, at location r in the PBR and expressed as... 

An alternative approach, based on thermodynamic and biochemical considerations, consists of defining the specific local rate of photon absorption (LRPA), tj expressed in /tmoliu /kg-s represents the amount of photons in the PAR region absorbed per unit weight of biomass and per unit time (Comet et al., 1992 Pmvost and Comet, 2012). The LRPA depends on the mass spectral absorption cross-section of the species and on the spectral fluence rate in the PBR. It can be expressed as (Comet et al., 1992)... 

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