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  2. Photosynthetically active radiation - Wikipedia

    en.wikipedia.org/wiki/Photosynthetically_active...

    However, photosynthesis is a quantum process and the chemical reactions of photosynthesis are more dependent on the number of photons than the energy contained in the photons. Therefore, plant biologists often quantify PAR using the number of photons in the 400-700 nm range received by a surface for a specified amount of time, or the ...

  3. Photosynthetic efficiency - Wikipedia

    en.wikipedia.org/wiki/Photosynthetic_efficiency

    Photosynthesis is the only process that allows the conversion of atmospheric carbon (CO2) to organic (solid) carbon, and this process plays an essential role in climate models. This lead researchers to study the sun-induced chlorophyll fluorescence (i.e., chlorophyll fluorescence that uses the Sun as illumination source; the glow of a plant) as ...

  4. Photosynthetic reaction centre - Wikipedia

    en.wikipedia.org/wiki/Photosynthetic_reaction_centre

    This test proved it was oxygen, or, as Joseph Priestley had called it, 'de-phlogisticated air'. In 1932, Robert Emerson and his student, William Arnold, used a repetitive flash technique to precisely measure small quantities of oxygen evolved by chlorophyll in the algae Chlorella. Their experiment proved the existence of a photosynthetic unit.

  5. PI curve - Wikipedia

    en.wikipedia.org/wiki/PI_Curve

    The PI (or photosynthesis-irradiance) curve is a graphical representation of the empirical relationship between solar irradiance and photosynthesis. A derivation of the Michaelis–Menten curve, it shows the generally positive correlation between light intensity and photosynthetic rate.

  6. Photosynthesis system - Wikipedia

    en.wikipedia.org/wiki/Photosynthesis_System

    A photosynthesis system analysing the photosynthetic rate of a maize leaf. Photosynthesis systems are electronic scientific instruments designed for non-destructive measurement of photosynthetic rates in the field. Photosynthesis systems are commonly used in agronomic and environmental research, as well as studies of the global carbon cycle.

  7. The Strange Way Giraffes Fight - AOL

    www.aol.com/strange-way-giraffes-fight-140232689...

    Watch the Video. Click here to watch on YouTube. Giraffes are known for their peaceful nature and their preference for living together in close family social groups. Although they rarely fight ...

  8. Fantasy Football Week 16 Rankings (Half-PPR) - AOL

    www.aol.com/sports/fantasy-football-week-16...

    The experts of Yahoo Fantasy reveal their fantasy football rankings at each position in Week 16 of the 2024 season.

  9. Read the Transcript of Trump's Person of the Year Interview - AOL

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    A question on the minds of a lot of Americans: Will you restore your policy of separating families? I don’t think—I won’t have to, because, first of all, it wasn’t my policy. It was Obama ...

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