| 释义 |
DictionarySeechlorinechlorin
chlorine, chlorin a toxic pungent greenish-yellow gas of the halogen group; the 15th most abundant element in the earth's crust, occurring only in the combined state, mainly in common salt: used in the manufacture of many organic chemicals, in water purification, and as a disinfectant and bleaching agent. Symbol: Cl; atomic no.: 17; atomic wt.: 35.4527; valency: 1, 3, 5, or 7; density: 3.214 kg/m3; relative density: 1.56; melting pt.: --101.03°C; boiling pt.: --33.9°C chlorin[′klȯr·ən] (biochemistry) A saturated porphyrin for which one double bond at a single pyrrole ring has been reduced. chlorin
chlo·rin (klōr'in), Do not confuse this word with chlorine.One of the root structures of the chlorophylls (see porphyrin). Addition of the two-carbon bridge (see chlorophyll) to chlorin yields phorbin(e); addition of side chains yields the phorbides, distinguished by a number of arbitrary prefixes (those found in the chlorophylls are pheo- and bacteriopheophorbide); esterification of the propionic group by phytyl yields the respective phytins, and the addition of magnesium yields the chlorophylls (magnesium phytinates). See: porphyrins. |