单词	naphthene
释义	naphthene /ˈnafθiːn / noun Chemistry Any of a group of cyclic aliphatic hydrocarbons (e.g. cyclohexane) obtained from petroleum.Most horticultural oils contain naphthene and paraffin compounds.... Since ethylenediamine is very polar, naphthenes are preferentially permeated to the solvent side. Oils high in naphthene also contain more impurities such as phytotoxic aromatic and unsaturated hydrocarbons. Derivatives naphthenic /nafˈθiːnɪk / adjective ... These are complex mixtures of paraffinic, aromatics and naphthenic hydrocarbon type molecules, ranging in carbon number from 14 to 40 +. The results given in Figure 3 show that the oil separation is lower for the naphthenic based grease. The different factors responsible for naphthenic corrosion as well as the ways of fighting it are reviewed.
随便看	competence competency competent competently competition competitive competitive advantage competitive exclusion competitively competitiveness competitor compilation compile compiler compile time comping complacence complacency complacent complacently complain complainant complainer complainingly complaint

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