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by Science Source
$6.95
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Our greeting cards are 5" x 7" in size and are produced on digital offset printers using 100 lb. paper stock. Each card is coated with a UV protectant on the outside surface which produces a semi-gloss finish. The inside of each card has a matte white finish and can be customized with your own message up to 500 characters in length. Each card comes with a white envelope for mailing or gift giving.
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Jan Ingenhousz (1730-1799) was a Dutch physiologist, biologist and chemist. In his lifetime he was best known for successfully inoculating the... more
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Jan Ingenhousz (1730-1799) was a Dutch physiologist, biologist and chemist. In his lifetime he was best known for successfully inoculating the members of the Habsburg family in Vienna against smallpox in 1768 and subsequently being the private counsellor and personal physician to the Austrian Empress Maria Theresa. But most importantly, in 1779, Ingenhousz discovered that, in the presence of light, plants give off bubbles from their green parts while, in the shade, the bubbles eventually stop. He identified the gas as oxygen. He also discovered that, in the dark, plants give off carbon dioxide. He realized as well that the amount of oxygen given off in the light is more than the amount of carbon dioxide given off in the dark. This demonstrated that some of the mass of plants comes from the air, and not only the soil, thus discovering what we have come to call photosynthesis and cellular respiration. He lived to be 68 and died of natural causes.
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Juan Patricio Arias Farias
La superficie de un cm2 de hoja recibe 100.000.000 choques de molèculas por minuto al estar expuesta a la presion atmosferica, por lo tanto solo basta un pequeño poro que permita pasar una molecula de oxigeno para que la planta disponga de suficiente oxigeno para la sintesis organica fotovoltaica .
Jonathan James
one thing you don't see stated emphatically is that the atmosphere of the earth is less and 1/1000 co2 and yet 1/5 oxygen much more than 200 to 1 so it's hard to envision but plants must literal be like contact adhesive literally absorbing every molecule of co2 that touches their leafs because the have no lungs.. plants absorb co2 serendipitous from contact