Science / Chemistry / Activated Complex: Transition state. An intermediate structure formed in the conversion of reactants to products. The activated complex is the structure at the maximum energy point along the reaction path; the activation energy is the difference between the energies of the activated complex and the reactants.
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Science / Chemistry / High Spin Complex: A metal-ligand complex with the same number of unpaired electrons as the uncomplexed metal ion. When a weak ligand complexes the metal ion, the crystal field splitting is small and the electrons can s MORE
Science / Biology / Golgi Complex: Organelles in animal cells composed of a series of fiattened sacs that sort, chemically modify, and package proteins produced on the rough endoplasmic reticulum. MORE
Science / Chemistry / Complexometric Titration: A titration based on a reaction between a ligand and a metal ion to form a complex. For example, free Ca2+ in milk powder can be determined by titrating a milk powder sample with EDTA solution, which MORE
Science / Chemistry / Low Spin Complex: A metal-ligand complex with fewer unpaired electrons than the uncomplexed metal ion. When a strong ligand complexes the metal ion, the crystal field splitting is large and some electrons pair rather t MORE
Science / Biology / Membrane-Attack Complex (MAC): A large cylindrical multiprotein complex formed by the complement system; kills invading microorganisms by embedding in their plasma membrane, creating a pore through which fiuid fiows, ultimately cau MORE
Science / Psychiatry / Oedipus Complex: Attachment of the child to the parent of the opposite sex, accompanied by envious and aggressive feelings toward the parent of the same sex. These feelings are largely repressed (i.e., made unconsciou MORE