Table-4: Concentrations of total aliphatic hydrocarbons (TAH) in marine sediments for some coastal regions in the world.
Comparing Hydrocarbon Levels in Jeddah Sediment with other Coasts in the World Total aliphatic hydrocarbons (TAH) in the present study were ranged between 2.18 - 492 ppm d.w.
Toxicity data for total aliphatic hydrocarbon (TAH) in sediment were not available due to the low solubility especially for the higher molecular weight fractions.
It is not possible (according to the available knowledge) to eliminate the formation of PAH in the obtained oil without elimination or decreasing the aromatization processes via secondary reactions through either a Diels-Alder type reaction or selective cracking of aliphatic compounds resulting in selective concentration of aromatic compounds.
* Chemical class fractionation of the obtained shale oil using solid phase extraction on silica gel was particularly useful for separation of the oil into aliphatic, aromatic, ester and polar hydrocarbons.
* The content of aliphatic material represented by the fractions pentane-1 and pentane-2 is lower in the oil obtained at pyrolysis under the nitrogen/steam atmosphere.
Epotuf epoxy hardeners include modified aliphatic and cycloaliphatic polyamines, polyamides and polyamide solutions, amidopolyamines, and anhydrides.
Epoxy curing agents for use in all epoxy application arenas include aromatic amines, aliphatic and cycloaliphatic mines, ketamines, polyamides, polyamine adducts and salts, amido-amine and accelerated amines.
Formulating is done with aliphatic amine, anhydride, polyamide, Lewis-acid, and cycloaliphatic chemistries.
We found that preovulatory LH in urine was lower in healthy, reproductive-age women who had higher internal doses of aliphatic HCs in exhaled breath.
Our high versus low aliphatic HC exposure groups had urinary LH levels of 15.4 versus 22.6 mIU/mg creatinine, respectively.
The mechanism by which aliphatic HCs could lower LH levels is unknown.