epoxy resin used was (3',4'-epoxycyclohexane) methyl 3,4-epoxycyclohexyl-carboxylate (CER, [M.sub.w] = 252.3, CEL2021P, Daicel Corp.).
It was shown that the aliphatic and alicyclic
oil hydrocarbons content in bottom sediments reduced in the course of the experiment from 53, 3[+ or -]7, 46 g/kg to 2, 2[+ or -]0, 39 g/kg.
These may belong to different derivatives of mono- and bicyclic aromatic hydrocarbons, but also to alicyclic
It is evident that even a small increase of the heating rate supports the splitting of alicyclic
rings and aliphatic groups in coal structure, and besides a considerable increase in the amount of hydrogen also brings the possibility of its additional formation through the secondary splitting of an increased amount of methane in the second stage.
Unless there is an enhanced hydrophobicity associated with an alicyclic
structure (e.g., [H.sub.12]MDI) these HEURs would be expected to be equal.
From the data gathered in Table 3 it is clear that the intrinsic gas phase acidity of the hydrogen attached to the tertiary carbon in position 1 is quite similar to that of the hydrogens borne by the secondary and tertiary carbons in a variety of aliphatic and alicyclic
Cycloalkane is a kind of saturated hydrocarbon containing an alicyclic
structure in organic chemistry and it contains an alicyclic
ring and unsubstituted alkyl on the ring.
PBCS by incorporation of alicyclic
units 1,4-cyclohexanedimethanol (CHDM) into PBS backbone has been extensively investigated on the biodegradability and biocompatibility , The chemical composition of PBCS series (PBCSs) plays an important role in controlling the physical properties.
Among the species, there were 28 kinds of low molecular alicyclic
hydrocarbons, accounting for about 68.3% of total species.
In a study of flavourings including aliphatic, alicyclic
and aromatic ethers (plus anisole derivatives), EFSA's scientific panel on food additives, flavourings, processing aids and materials in contact with food criticised Maximised Survey-derived Daily Intakes (MSDIs) methods, looking at average consumption of a flavouring.
It appears that macropores are found on the edge of the polymer where they are formed as a result of the alicyclic
and aliphatic hydrocarbons combination .
In this context, literature data indicate few main structural modifications of the backbone (5), such as incorporation of flexible linkages (6), introduction of twisted (7) or unsymmetrical (8) structures, bulky substituents (9), incorporation of aliphatic or alicyclic
monomers (10) (organic compounds that are both aliphatic and cyclic), and copolymerization (11), which may improve solubility.