Thus, there was global and selective increase in ceramides and DHceramides per unit of PDT light dose.
I is the intensity of the incident light, it can be determined by light power per unit area of light spot.
Cheap, conventional bulbs require more electricity per lumen, or unit of light output, than compact fluorescent or halogen bulbs, something that makes them increasingly unpopular for efficiency-oriented consumers.
Heavier birds used less energy per unit of mass than lighter birds, a counterintuitive result that may be a clue to how and why knots make such long nonstop journeys between hemispheres, the group suggests.
Halogen lamps emit more light per unit of energy than other sources of illumination, which gives them a quality of concentration, and this one lives up to its claim of being a task lamp, practically vibrating with energy and purpose.
Light-emitting diodes are tiny electronic devices that emit far more light per unit of electricity than incandescent lamps or even compact fluorescents.
Priced from $10 to $14 apiece, PolyBrite says its LED bulbs will deliver an incredible six times the light per unit of electricity that an incandescent does.
Rλ is the spectral responsivity, defined as the photocurrent generated per unit of power of the incident light on effective areas.
2005 genotypes expressed greater allocational plasticity in response to light level during the rapid growth stage (week 4) than 1994 plants, producing significantly less root tissue per unit of leaf surface area in Low light, and more steeply increasing this ratio in High light (mean within-genotype increase of 239% vs 125%, Fig. 3D; significant Treatment × Year effect, Table 3).
