CHEM237 Study Guide - Final Guide: Polyacrylamide Gel Electrophoresis, Aromatic Amino Acids, Affinity Chromatography
22 Aug 2016
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Chromatophores: cells that contain pigment (expand dark/contract light) Biomimicry: inventions and designs based on nature that are used to solve human problems. Properties of water: partially charged environments, permanent dipoles, net charge 0. The probability of the second or more h-bond will increase after the first h-bond is formed. Hydrogen are donors while the other electronegative atoms are acceptors. Form between water/alcohol, water/ketone, peptide groups, complementary bases. Liquid water has 15% less h-bonds than ice, where there are networks of fluctuating h- bonds. When water freezes into ice, each h2o molecule is roughly tetrahedral and make 4 h- bonds (2 h-bonds as a donor, and 2-h bonds as an acceptor) Water expands when it freezes and decreases in density; which is good! Water makes a strong solvent for many biological molecules: highly polar, h-bond capability. Solvation sphere: when a nonpolar molecule enters water, a constrained layer of water molecules surround the nonpolar molecule.
