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  2. List of search engines - Wikipedia

    en.wikipedia.org/wiki/List_of_search_engines

    Find files and folders by name instantly on NTFS volumes Freeware Found MacOS: Searches for files stored locally, and the cloud and inbox and, is summoned with a double-tap of the ctrl key. Program now discontinued. Free, Proprietary GNOME Storage: Linux: Open-source desktop search tool for Unix/Linux GPL Google Desktop: Linux, Mac OS X, Windows

  3. Photosystem I - Wikipedia

    en.wikipedia.org/wiki/Photosystem_I

    Antenna molecules can absorb all wavelengths of light within the visible spectrum. [12] The number of these pigment molecules varies from organism to organism. For instance, the cyanobacterium Synechococcus elongatus ( Thermosynechococcus elongatus ) has about 100 chlorophylls and 20 carotenoids, whereas spinach chloroplasts have around 200 ...