- polycyclic system
- 多环体系
Medical Chinese dictionary (湘雅医学词典). 2013.
Medical Chinese dictionary (湘雅医学词典). 2013.
polycyclic aromatic compound — abbr. PAC PAC includes multi ringed aromatic hydrocarbons in which one or more atoms of nitrogen, oxygen or sulfur (a heteroatom) replace one of the carbon atoms in a ring system. The PACs can be grouped according to the heteroatom they contain.… … Petroleum refining glossary
Chlorinated polycyclic aromatic hydrocarbon — Chlorinated polycyclic aromatic hydrocarbons (ClPAHs) are a group of compounds comprising polycyclic aromatic hydrocarbons with two or more aromatic rings and one or more chlorine atoms attached to the ring system. ClPAHs can be divided into two… … Wikipedia
Magma computer algebra system — Magma Developer(s) Computational Algebra Group, School of Mathematics and Statistics, University of Sydney Stable release 2.17 8 / May 27, 2011 Operating system … Wikipedia
Open-chain compound — In chemistry, an open chain compound (also spelled as open chain compound) or acyclic compound is a compound with a linear structure, rather than a cyclic one. [1] An open chain compound having no side chains is called a straight chain compound… … Wikipedia
hydrocarbon — hydrocarbonaceous, adj. /huy dreuh kahr beuhn, huy dreuh kahr /, n. any of a class of compounds containing only hydrogen and carbon, as an alkane, methane, CH4, an alkene, ethylene, C2H4, an alkyne, acetylene, C2H2, or an aromatic compound,… … Universalium
heterocyclic compound — Any of a class of organic compounds whose molecules contain one or more rings of atoms with at least one atom (the heteroatom) being an element other than carbon, most frequently oxygen, nitrogen, or sulfur. As in regular cyclic hydrocarbons,… … Universalium
85-01-8 — Phénanthrène Phénanthrène Structure du phénanthrène Général No CAS … Wikipédia en Français
Phenanthrene — Phénanthrène Phénanthrène Structure du phénanthrène Général No CAS … Wikipédia en Français
Phénanthrène — Structure du phénanthrène Général … Wikipédia en Français
Risk factors for breast cancer — Risk factors of breast cancer may be divided into preventable and non preventable. Their study belongs in the field of epidemiology. Breast cancer, like other forms of cancer, is considered to result from multiple environmental and hereditary… … Wikipedia
Aromatic hydrocarbon — Arene redirects here. For other uses, see Arene (disambiguation). An aromatic hydrocarbon or arene[1] (or sometimes aryl hydrocarbon)[2] is a hydrocarbon with alternating double and single bonds between carbon atoms. The term aromatic was… … Wikipedia