See abscisic acid.参阅abscisic acid。...[继续阅读]

    A PLANT HORMONEonce thought to be responsible for theshedding (abscission)of flowers and fruitand for the onset of dormancy in buds(hence its early name,dormin).The com-pound is associated with the closing ofpores(stoma)in the leaves of plants de-prived o...[继续阅读]

    Pure alcohol (ethanol).纯酒精(乙醇)。...[继续阅读]

    A particular molec-ular configuration of a CHIRAL molecule,as denoted by comparison with a referencemolecule or by some sequence rule. Thereare two systems for expressing absoluteconfiguration in common use:the D-Lconvention and the R-S convention. Seeopt...[继续阅读]

    Symbol:T A tem-perature defined by the relationship:T=θ+273.15where θ is the Celsius temperature. The ab-solute scale of temperature was a funda-mental scale based on Charles’law,whichapplies to an ideal gas:V=V_0(1 +αθ)where V is the volume at temperatur...[继续阅读]

    The zero value of thermody-namic temperature; 0 kelvin or -273.15℃.See absolute temperature.热力学温度的零值:0°K或-273.15℃。参阅absolutetemperature。...[继续阅读]

    1.A process in which a gas istaken up by a liquid or solid,or in which aliquid is taken up by a solid.In absorption,the substance absorbed goes into the bulkof the material.Solids that absorb gases orliquids often have a porous structure.Theabsorption of ...[继续阅读]

    See spectrum. 参阅spectrum。...[继续阅读]

    A substance that increases therate of a chemical reaction.In this sense theterm is synonymous with CATALYST.It iscommon to refer to catalysts as‘accelerators’in certain industrial applications.For exam-ple,accelerators are used in the VULCANI-ZATION of ru...[继续阅读]

    The atom or group to which apair of electrons is donated in forming aCOORDINATE BOND.指接受一对电子形成配价键的原子或原子团。...[继续阅读]