[permalink] [id link]
Mycosides are phenolic alcohols ( such as phenolphthiocerol ) that were shown to be components of mycobacterium glycolipids that are termed glycosides of phenolphthiocerol dimycocerosate ( Smith DW et al., Nature 1960, 186, 887 ) There are 18 and 20 carbon atoms in mycosides A, and B, respectively.
from
Wikipedia
Some Related Sentences
are and phenolic
Fretboards are most commonly made of ebony, but may also be made of rosewood or of phenolic composite (" micarta ").
Modern commercial domino sets are usually made of synthetic materials, such as ABS or polystyrene plastics, or Bakelite and other phenolic resins ; many sets approximate the look and feel of ivory while others use colored or even translucent plastics to achieve a more contemporary look.
In electronic devices, the tiny and delicate active components are embedded within nonconductive epoxy or phenolic plastics, or within baked glass or ceramic coatings.
A closely related plant is marjoram from Turkey, which, however, differs significantly in taste, because phenolic compounds are missing from its essential oil.
In addition to oleuropein, freshly picked olives are not palatable because of phenolic compounds.
Commercially charred oaks are rich in phenolic compounds.
Many wheat varieties are reddish-brown due to phenolic compounds present in the bran layer which are transformed to pigments by browning enzymes.
In wheat, phenolic compounds are mainly found in the form of insoluble bound ferulic acid and be relevant to resistance to wheat fungal diseases.
Alkylresorcinols are phenolic lipids present in high amounts in the bran layer ( e. g. pericarp, testa and aleurone layers ) of wheat and rye ( 0. 1-0. 3 % of dry weight ).
Many of the odor compounds in wood smoke, especially the phenolic compounds, are unstable, dissipating after a few weeks or months.
Phenol and other phenolic compounds in wood smoke are both antioxidants, which slow rancidification of animal fats, and antimicrobials, which slow bacterial growth.
Grandinin / roburin E, castalagin / vescalagin, gallic acid, monogalloyl glucose ( glucogallin ) and valoneic acid dilactone, monogalloyl glucose, digalloyl glucose, trigalloyl glucose, ellagic acid rhamnose, quercitrin and ellagic acid are phenolic compounds found in Q. alba.
The most common are known as polyester, vinyl ester, epoxy, phenolic, polyimide, polyamide, polypropylene, PEEK, and others.
Chlorophyll content can also be assessed with a chlorophyll fluorometer, which measures a chlorophyll fluorescence ratio to identify phenolic compounds that are produced in higher quantities when nitrogen is limited.
The ester and phenolic aspects are produced by the special type of yeast, rather than the high fraction of wheat in the grain bill.
Various materials are used in the construction of compression driver diaphragms including titanium, aluminium, phenolic impregnated fabric, polyimide and PET film, each having its own characteristics.
Grandinin / roburin E, castalagin / vescalagin, gallic acid, monogalloyl glucose ( glucogallin ) and valoneic acid dilactone, monogalloyl glucose, digalloyl glucose, trigalloyl glucose, ellagic acid rhamnose, quercitrin and ellagic acid are phenolic compounds found in Q. alba.
Modified tung oil and phenolic resins are often used.
Tannins are phenolic compounds that are commonly found in plants.
Common polymers like epoxy and phenolic are examples of thermosetting plastics while nylon, polyethylene, and polystyrene are thermoplastic.
Whenever possible, when structures are omitted from the text, these labels will be provided to make clear what type of phenolic compound is under discussion.
As Quideau notes above, and despite web definitions to the contrary, all chemicals presenting a phenolic group are not polyphenols and so cannot be expected to provide the health benefits associated with, for instance, tea and wine polyphenols ( see below ).
are and alcohols
An important class of alcohols are the simple acyclic alcohols, the general formula for which is C < sub > n </ sub > H < sub > 2n + 1 </ sub > OH.
Other alcohols are usually described with a clarifying adjective, as in isopropyl alcohol ( propan-2-ol ) or wood alcohol ( methyl alcohol, or methanol ).
Two other alcohols whose uses are relatively widespread ( though not so much as those of methanol and ethanol ) are propanol and butanol.
) Saccharomyces yeast are known to produce these higher alcohols at temperatures above.
These alcohols are called fusel alcohols or fusel oils in brewing and tend to have a spicy or peppery flavor.
Eight structural isomers with molecular formula C < sub > 5 </ sub > H < sub > 12 </ sub > O and all alcohols are known:
Reactions with water and alcohols are also very exothermic and release hydrogen gas:
* concentrated alcohols ( mainly ethanol, 1-propanol, called also n-propanol and 2-propanol, called isopropanol and mixtures thereof ; further, 2-phenoxyethanol and 1-and 2-phenoxypropanols are used ),
Carboxylate ions are resonance stabilized and this increased stability makes carboxylic acids more acidic than alcohols.
Components other than ethanol, including water, esters, and other alcohols, are collected in the condensate, which account for the flavor of the beverage.
Esters are usually derived from an inorganic acid or organic acid in which at least one-OH ( hydroxyl ) group is replaced by an-O-alkyl ( alkoxy ) group, and most commonly from carboxylic acids and alcohols.
Esters are more polar than ethers but less polar than alcohols.
Reagents are known that drive the dehydration of mixtures of alcohols and carboxylic acids.
Digestifs are traditionally stronger, and include Cognac, Armagnac, Calvados and fruit alcohols.
Hydrogen is the most common fuel, but hydrocarbons such as natural gas and alcohols like methanol are sometimes used.
Because of their inability to serve both as hydrogen-bond donors and acceptors, ketones tend not to " self-associate " and are more volatile than alcohols and carboxylic acids of comparable molecular weights.
They are the esters of nitric acid and alcohols formed by nitroxylation.
Organic compounds are classified according to functional groups, alcohols, carboxylic acids, amines, etc.
The bulk of the synthetic alcohols, at least those larger than ethanol, are produced by hydrogenation of hydroformylation derived aldehydes.
Although similar to alcohols, phenols have unique properties and are not classified as alcohols ( since the hydroxyl group is not bonded to a saturated carbon atom ).
The main constituents of attar of roses are the fragrant alcohols geraniol and l-citronellol ; and rose camphor, an odourless paraffin.
0.369 seconds.