LSCI 211 Lecture Notes - Lecture 1: Heat Capacity, Gibbs Free Energy, Micelle
28 Aug 2016
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Document Summary
A self-organized, self-replicating state of matter that interacts with its environment. A solvent (for polar molecules like amino acids, proteins, alcohols, sugars and salts) Causes polar biological molecules to have a sphere of hydration. Reactant and source of protons h3o+ and hydroxyl oh- High heat of vaporization, good evaporative and coolant. High specific heat capacity makes it a good heat buffer. Creates strong hydrogen bonds (more bonds with less entropy- i. e. ice) A network of many h-bonds can stabilize molecules. Gibbs free energy = enthalpy temperature x entropy. Ratio of the concentration of a compound in two phases. Amphipathic molecules have both hydrophilic and hydrophobic regions. Allows for disequilibrium on either side of biological membranes. While these interactions are weak individually, together they are strong. Important in enzyme-substrate and hormone-receptor recognition, antibodies binding to antigens, and neurotransmitters to neuroreceptors. H is between two atoms with high electronegativity (o, n)
