Main compounds of interest include, acids, alcohols, ketones, aldehydes, lactones, esters, sulphur, phenols, benzene compounds, terpenes, alkanes
, alkenes, thiols, thiol esters, pyrazines, furans, amines and others.
At lower temperatures the clearly defined components (match quality > 80%) included mainly alkanes
, oxygen-containing compounds and some heteroatomic compounds.
05ml of mineral oil (selected from one of the following groups of light mixtures of alkanes
in the C15 to C40 range from a non-vegetable source, a distillate of petroleum, a paraffinic oil based on n-alkanes
, naphthenic oil based on cycloalkanes, aromatic oil based on aromatic hydrocarbons) and a double headed brush in which the front brush has coarse bristles for scrubbing and a rubber brush for deep cleaning.
The equilibrium of the alkanes
in the rumen was achieved within seven days according to the product instruction.
We uncovered a whole new class of inexpensive metals that allows us to process methane and the other alkanes
contained in natural gas, ethane and propane, at about 180 degrees centigrade or lower, instead of the more than 500[sup.
The research team engineered the fatty acid metabolism to provide the fatty acid derivatives that are shorter than normal intracellular fatty acid metabolites, and introduced a novel synthetic pathway for the biosynthesis of short-chain alkanes
The standard sensitivity mode works well for polar compounds such as ketones, alcohols, and esters, while the high-sensitivity mode works well for compounds such as halogenated alkanes
and substituted aromatics, as well as mixtures with one or more compounds of low concentration.
Alkanofer \aI-KAN-o-fer\ A subsurface body made of liquid alkanes
, molecules such as methane and ethane that contain only single-bonded carbon and hydrogen atoms.
Other topics covered include oxidation of olefins and alkanes
, asymmetric synthesis, and the catalytic behavior of particular metalloenzymes.
The new chemical process - discovered by chemists at the Catalysis Institute of Cardiff University - could mean that a raft of by-products of diesel production that have little practical use, such as low-value alkanes
, could be converted into chemicals for use in processes ranging from the production of dyes and life-saving medicines.
Results indicated that 24-hr transition metals and alkanes
were associated with increased odds of hospital admissions for cardiovascular disease (CVD); transition metals were significantly associated with increased hospital admissions for ischemic heart disease, congestive heart failure, and atrial fibrillation; increased respiratory-related hospital admissions were significantly associated with exposure to alkanes
; and aromatics and microcrystalline oxides were significantly associated with decreased CVD- and respiratory-related hospital admissions.
The main components of the base oil are cyclic alkanes