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  2. Multimodal transport - Wikipedia

    en.wikipedia.org/wiki/Multimodal_transport

    Multimodal transport (also known as combined transport) is the transportation of goods under a single contract, but performed with at least two different modes of transport; the carrier is liable (in a legal sense) for the entire carriage, even though it is performed by several different modes of transport (by rail, sea and road, for example).

  3. Partial charge - Wikipedia

    en.wikipedia.org/wiki/Partial_charge

    In atomic physics, a partial charge (or net atomic charge) is a non-integer charge value when measured in elementary charge units. It is represented by the Greek lowercase delta (𝛿), namely 𝛿− or 𝛿+.

  4. Four-bar linkage - Wikipedia

    en.wikipedia.org/wiki/Four-bar_linkage

    Planar four-bar linkages are constructed from four links connected in a loop by four one-degree-of-freedom joints.A joint may be either a revolute joint – also known as a pin joint or hinged joint – denoted by R, or a prismatic joint – also known as a sliding pair – denoted by P. [Note 1]

  5. Quadruple bond - Wikipedia

    en.wikipedia.org/wiki/Quadruple_bond

    This bond is an extension of the more familiar types of covalent bonds: double bonds and triple bonds. [1] Stable quadruple bonds are most common among the transition metals in the middle of the d-block, such as rhenium, tungsten, technetium, molybdenum and chromium. Typically the ligands that support quadruple bonds are π-donors, not π ...

  6. Hydrogen bond - Wikipedia

    en.wikipedia.org/wiki/Hydrogen_bond

    The hydrogen of the donor is protic and therefore can act as a Lewis acid and the acceptor is the Lewis base. Hydrogen bonds are represented as H···Y system, where the dots represent the hydrogen bond. Liquids that display hydrogen bonding (such as water) are called associated liquids.

  7. Cross-link - Wikipedia

    en.wikipedia.org/wiki/Cross-link

    Chemical reactions associated with crosslinking of drying oils, the process that produces linoleum.. Crosslinking generally involves covalent bonds that join two polymer chains.

  8. Electron transport chain - Wikipedia

    en.wikipedia.org/wiki/Electron_transport_chain

    An electron transport chain (ETC [1]) is a series of protein complexes and other molecules which transfer electrons from electron donors to electron acceptors via redox reactions (both reduction and oxidation occurring simultaneously) and couples this electron transfer with the transfer of protons (H + ions) across a membrane.

  9. Covalent bond - Wikipedia

    en.wikipedia.org/wiki/Covalent_bond

    A covalent bond forming H 2 (right) where two hydrogen atoms share the two electrons. A covalent bond is a chemical bond that involves the sharing of electrons to form electron pairs between atoms.