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Monday 10-1 Lecture 1 Q: Thanks for podcasting How can one not
Monday 10-1 Lecture 1 Q: Thanks for podcasting How can one not

... No, but you should be able to recognize them. There is a big difference between recognizing a structure that has been shown to you and drawing one on a blank page. Although there there might be “tricky” ways to make it difficult for people to recognize a structure (like adding an extra –CH2- to the ...
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... The oxidation number is used to express the oxidation state of an element, whether as the uncombined element or when combined in a compound; it consists of a + or – sign followed by a number, or it is zero. Atoms of elements have no overall charge and are therefore given an oxidation number of zero. ...
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Photosynthetic reaction centre

A photosynthetic reaction center is a complex of several proteins, pigments and other co-factors assembled together to execute the primary energy conversion reactions of photosynthesis. Molecular excitations, either originating directly from sunlight or transferred as excitation energy via light-harvesting antenna systems, give rise to electron transfer reactions along a series of protein-bound co-factors. These co-factors are light-absorbing molecules (also named chromophores or pigments) such as chlorophyll and phaeophytin, as well as quinones. The energy of the photon is used to promote an electron to a higher molecular energy level of a pigment. The free energy created is then used to reduce a chain of nearby electron acceptors, which have subsequently higher redox-potentials. These electron transfer steps are the initial phase of a series of energy conversion reactions, ultimately resulting in the production of chemical energy during photosynthesis.
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