HIST10014 Lecture Notes - Lecture 8: Jan Ingenhousz, Photosystem I, Photosynthetic Pigment
6 Aug 2018
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Photosynthesis: light energy is harvested and used to make carbohydrates from carbon dioxide and water, oxygen is released. The process by which autotrophic organisms trap the energy of sunlight and synthesise carbohydrates that heterotrophic organisms depend on. Earliest organisms were heterotrophs oxidised molecules from primeval broth" non renewable. Coal equivalent of 100 fty ton rail cars per second. Fossil fuels have energy as they were products of photosynthesis that were buried before they could have their energy used. For these discoveries we are assured that no vegetable grows in vain but cleanses and puri es our atmosphere" - joseph priestly. Plants in darkness contaminate the air" so that it is harmful to animals" and that sun itself has no power to mend air with the concurrence of plants" - jan ingenhousz. Solar energy is harvested and stored in chemical bonds of atp and carbohydrates, made from. Most energy is absorbed by the earth as heat energy.
