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  • Updated 12 months ago
    Opsin does not absorb visible light, but when it bonded with 11-cis-retinal by its lysine side-chain to from rhodopsin, the new molecule has a very broad absorption band in the visible region of the spectrum.[2][3] By removing the oxygen atom form the retinal and two hydrogen atom form the free amino group of the lysine, the linkage show on the picture above is formed, and it is called Schiff base.
    http://chemwiki.ucdavis.edu/Biological_Chemistry/Photoreceptors/Vision_and_Light
  • Updated 12 months ago
    Photoreceptor proteins are light-sensitive proteins involved in the sensing and response to light in a variety of organisms.[1] Photoreceptor proteins can be find in both animals and plants. Hence, they can, indeed, be considered as “star actors” in the pursuit to understand, in general terms, the atomic details of the dynamics of functional conformational transitions [i.e., (partial) un/folding] in these proteins required for their functioning.[4]
    http://chemwiki.ucdavis.edu/Biological_Chemistry/Photoreceptors/Photoreceptor_Protein
  • Updated 12 months ago
    Classically, the Franck–Condon principle is the approximation that an electronic transition is most likely to occur without changes in the positions of the nuclei in the molecular entity and its environment. The quantum mechanical formulation of this principle is that the intensity of a vibronic transition is proportional to the square of the overlap integral between the vibrational wavefunctions of the two states that are involved in the transition.
    http://chemwiki.ucdavis.edu/Physical_Chemistry/Spectroscopy/Electronic_Spectroscopy/Franck-Condon_Principle
  • Updated 12 months ago
    where k is a proportionality constant, Io is the incident light intensity, is the molar absorptivity, b is the path length, and c is the concentration of the substrate. Fluorescence commonly occurs from a transition from the lowest vibrational level of the first excited electronic state to the one of the vibrational levels of the electronic ground state.
    http://chemwiki.ucdavis.edu/Physical_Chemistry/Spectroscopy/Electronic_Spectroscopy/Fluorescence
  • Updated 12 months ago
    The inner product of the product of a scalar and the first vector times the second vector is equal to the product of the scalar times the inner product of the first vector times the second vector. The inner product of the vector sum of vector 1 and vector 2 times vector 3 is equal to the sum of the inner product of vector 1 times vector 3 and the inner product of vector 2 times vector 3.
    http://chemwiki.ucdavis.edu/Physical_Chemistry/Spectroscopy/Fundamentals/From_Linear_Algebra_to_Fourier_Transforms_for_Chemists
  • Updated 12 months ago
    The following headers are meant as a guide to the sections that you need in your module. The module should be easy to read; please reduce excess space, crop figures to remove white spaces, full justify all text, with the exception of equations, which should use the equation command for construction (see FAQ). You can delete the header for this section and place your own related to the topic. Remember to hyperlink your module to other modules via the link button on the editor toolbar.
    http://chemwiki.ucdavis.edu/Wikitexts/Hope_College/HOPE_343/P_and_T_Effects_on_Equilibrium
  • Updated 12 months ago
    The following headers are meant as a guide to the sections that you need in your module. The module should be easy to read; please reduce excess space, crop figures to remove white spaces, full justify all text, with the exception of equations, which should use the equation command for construction (see FAQ). You can delete the header for this section and place your own related to the topic. Remember to hyperlink your module to other modules via the link button on the editor toolbar.
    http://chemwiki.ucdavis.edu/Wikitexts/Hope_College/HOPE_343/Critical_Points
  • Updated 12 months ago
    Lewis was taught at home by his parents until the age of fourteen, when he entered The University of Nebraska. Eventually, Lewis became the Dean of the College of Chemistry and the Chairman of the Department of Chemistry at UC Berkeley. Lewis decided to focus his career studies on thermodynamics, isotopes, the relationship between matter and light, and the electron-pair bonding theory. Lewis was one of the first chemists to hypothesize about covalent bonding and the octet rule.
    http://chemwiki.ucdavis.edu/txHistory_of_Chemistry/Biographies/Lewis%2C_Gilbert_Newton
  • Updated 12 months ago
    The following headers are meant as a guide to the sections that you need in your module. The module should be easy to read; please reduce excess space, crop figures to remove white spaces, full justify all text, with the exception of equations, which should use the equation command for construction (see FAQ). You can delete the header for this section and place your own related to the topic. Remember to hyperlink your module to other modules via the link button on the editor toolbar.
    http://chemwiki.ucdavis.edu/Wikitexts/UC_Davis/UCD_Chem_110B/Chem110B_Extra_Credit/Selection_Rules_Are_Derived_from_Time-Dependent_Perturbation_Theory
  • Updated 12 months ago
    The following headers are meant as a guide to the sections that you need in your module. The module should be easy to read; please reduce excess space, crop figures to remove white spaces, full justify all text, with the exception of equations, which should use the equation command for construction (see FAQ). You can delete the header for this section and place your own related to the topic. Remember to hyperlink your module to other modules via the link button on the editor toolbar.
    http://chemwiki.ucdavis.edu/Wikitexts/UC_Davis/UCD_Chem_110B/Chem110B_Extra_Credit/The_Lines_in_a_Pure_Rotational_Spectrum_Are_Not_Equally_Spaced
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