When.com Web Search

Search results

  1. Results From The WOW.Com Content Network
  2. Photochemical action plots - Wikipedia

    en.wikipedia.org/wiki/Photochemical_action_plots

    A key finding of modern photochemical action plots [32] is that the absorption spectrum of a photoreactive molecule or reaction mixture correlates poorly with photochemical reactivity as a function of wavelength in many cases. Initial studies showed a significant red-shift in photopolymerization yield compared to the absorption spectrum of the ...

  3. Action spectrum - Wikipedia

    en.wikipedia.org/wiki/Action_spectrum

    Absorbance spectra of free chlorophyll a (blue) and b (red) in a solvent. The action spectra of chlorophyll molecules are slightly modified in vivo depending on specific pigment-protein interactions. An action spectrum is a graph of the rate of biological effectiveness plotted against wavelength of light. [1]

  4. Phototropism - Wikipedia

    en.wikipedia.org/wiki/Phototropism

    Phototropism in Solanum lycopersicum. In biology, phototropism is the growth of an organism in response to a light stimulus. Phototropism is most often observed in plants, but can also occur in other organisms such as fungi. The cells on the plant that are farthest from the light contain a hormone called auxin that reacts when phototropism ...

  5. Phototropin - Wikipedia

    en.wikipedia.org/wiki/Phototropin

    One study found that phototropins on the plasma membrane play a role in phototropism, leaf flattening, stomatal opening, and chloroplast movements, while phototropins on the chloroplasts only partially affected stomatal opening and chloroplast movement, [16] suggesting that the location of the protein in the cell may also play a role in its ...

  6. Phytochrome - Wikipedia

    en.wikipedia.org/wiki/Phytochrome

    It has been well documented that gravitropism is the main tropism in roots. However, a recent study has shown that phototropism also plays a role. A red light induced positive phototropism has been recently recorded in an experiment that used Arabidopsis to test where in the plant had the most effect on a positive phototropic response.

  7. Photosynthetically active radiation - Wikipedia

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

    Bottom: PAR action spectrum (oxygen evolution per incident photon) of an isolated chloroplast. Chlorophyll , the most abundant plant pigment, is most efficient in capturing red and blue light. Accessory pigments such as carotenes and xanthophylls harvest some green light and pass it on to the photosynthetic process, but enough of the green ...

  8. Steve Kerr 'angry' and 'mad' about missed timeout call in ...

    www.aol.com/sports/steve-kerr-angry-mad-missed...

    Crew chief Tyler Ford told a pool reporter after the game that it wasn't totally clear what Braun was doing, which is why he called for a jump ball instead of assessing the Nuggets a technical foul.

  9. Photomorphogenesis - Wikipedia

    en.wikipedia.org/wiki/Photomorphogenesis

    Phytochrome is the only known photoreceptor that absorbs light in the red/far red spectrum of light (600-750 nm) specifically and only for photosensory purposes. [1] Phytochromes are proteins with a light absorbing pigment attached called a chromophore. The chromophore is a linear tetrapyrrole called phytochromobilin. [7]