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  2. Caucuses of the United States Congress - Wikipedia

    en.wikipedia.org/wiki/Caucuses_of_the_United...

    A congressional caucus is a group of members of the United States Congress that meets to pursue common legislative objectives. Formally, caucuses are formed as Congressional Member Organizations (CMOs) through the United States House of Representatives and governed under the rules of that chamber.

  3. Exogenous and endogenous variables - Wikipedia

    en.wikipedia.org/wiki/Exogenous_and_endogenous...

    An endogenous change is a change in an endogenous variable in response to an exogenous change that is imposed upon the model. [ 1 ] : p. 8 [ 3 ] : p. 8 The term ' endogeneity ' in econometrics has a related but distinct meaning.

  4. Metabolomics - Wikipedia

    en.wikipedia.org/wiki/Metabolomics

    The version 3.5 of the HMDB contains >16,000 endogenous metabolites, >1,500 drugs and >22,000 food constituents or food metabolites. [32] This information, available at the Human Metabolome Database and based on analysis of information available in the current scientific literature, is far from complete. [ 33 ]

  5. Substrate (chemistry) - Wikipedia

    en.wikipedia.org/wiki/Substrate_(chemistry)

    In chemistry, the term substrate is highly context-dependent. [1] Broadly speaking, it can refer either to a chemical species being observed in a chemical reaction, or to a surface on which other chemical reactions or microscopy are performed. In the former sense, a reagent is added to the substrate to generate a product through a chemical ...

  6. Coalition - Wikipedia

    en.wikipedia.org/wiki/Coalition

    Coalitions can be classified as internal or external. Internal coalitions consist of people who are already in an organization, such as a workplace. [7] For example, a trade union is a type of coalition formed to represent employees' wages, benefits, and working conditions.

  7. Ligand (biochemistry) - Wikipedia

    en.wikipedia.org/wiki/Ligand_(biochemistry)

    In contrast to the definition of ligand in metalorganic and inorganic chemistry, in biochemistry it is ambiguous whether the ligand generally binds at a metal site, as is the case in hemoglobin. In general, the interpretation of ligand is contextual with regards to what sort of binding has been observed.

  8. List of unsolved problems in chemistry - Wikipedia

    en.wikipedia.org/wiki/List_of_unsolved_problems...

    This is a list of unsolved problems in chemistry. Problems in chemistry are considered unsolved when an expert in the field considers it unsolved or when several experts in the field disagree about a solution to a problem.

  9. Molecular binding - Wikipedia

    en.wikipedia.org/wiki/Molecular_binding

    Molecular binding is an attractive interaction between two molecules that results in a stable association in which the molecules are in close proximity to each other. It is formed when atoms or molecules bind together by sharing of electrons.