What's the difference between paraxylene and substituent?

Paraxylene


Definition:

  • (n.) A hydrocarbon of the aromatic series obtained as a colorless liquid by the distillation of camphor with zinc chloride. It is one of the three metamers of xylene. Cf. Metamer, and Xylene.

Example Sentences:

  • (1) We studied the surface hydrophobicity of 88 Acinetobacter baumannii strains of clinical origin, using both salt aggregation and adherence to paraxylene tests.
  • (2) This incident put the spotlight back on paraxylene (PX) - a benzene-based chemical widely used in plastic bottles and polyester clothing.
  • (3) Others held banners that spelled out local concerns about the factory, which produces paraxylene (PX) - a benzene-based chemical widely used in plastic bottles and polyester clothing.
  • (4) The Fujia petrochemical plant has the capacity to produce 700,000 tonnes of paraxylene (PX), a benzene-based chemical widely used in plastic bottles and polyester clothing.
  • (5) Every year, the refinery would produce 500,000 tonnes of the chemical paraxylene (PX), a suspected carcinogen used in production of polyester, according to the state-run China Daily newspaper.
  • (6) Every year the refinery would produce 500,000 tons of paraxylene (PX), a carcinogenic chemical used in production of polyester , according to the state-run China Daily newspaper.
  • (7) Some chanted old revolutionary songs, and others held banners spelling out local concerns about the factory, which produces paraxylene (PX), a benzene-based chemical widely used in plastic bottles and polyester clothing.
  • (8) In August I attended a thousand-person protest against plans to build a petrochemical refinery and by-product paraxylene (PX) plant just 30km away.

Substituent


Definition:

  • (n.) Any atom, group, or radical substituted for another, or entering a molecule in place of some other part which is removed.

Example Sentences:

  • (1) Replacement of vinyl groups with bulkier substituents (hydroxyethyl or acetyl groups) decreases holoenzyme stability and catalytic activity.
  • (2) The molar refractivity has been shown to be a superior parameter for the description of the activity of sulphonamides than the sum of electronegativities of atoms making up a heterocyclic substituent in the sulphonamide molecule and molecular weight of the substituent.
  • (3) Energy conformational calculations on these compounds were also carried out using the empirical energy program called MOLMEC, in order to better understand how the 4-R substituents modulate receptor binding affinities and efficacies.
  • (4) The N-substituents included methyl, benzyl, and beta-hydroxy- and beta-chloroethyl groups.
  • (5) Substitution at the 5'-position resulted in decreased efficacy as inhibitors of uridine kinase, particularly if the substituent was large.
  • (6) Enzyme-inhibiting ability for individual alkylphenols can be estimated based on the quantitative structure-activity relationship developed by Dewhirst (1980) and is a function of the free hydroxyl group, electron-donating ring substituents, and hydrophobic aromatic ring substituents.
  • (7) All other broad-spectrum benzimidazole anthelmintics, regardless of substituent at the 2 position (methyl carbamate or thiazolyl group), are flat.
  • (8) Difference spectra for the tetracyclines were dependent on the characteristics of the ring substituents.
  • (9) Activity was insensitive to oxygen and CO if the substrates had no additional substituents on either ring or contained only electron-donating substituents.
  • (10) The hypothesis that opiate agonism requires an N substituent in the axial position does not appear to be consistent with the increased potency of beta isomers in which axial N substituents are thermodynamically more unstable.
  • (11) The ability of the monocarboxylate analogues to inhibit depends strongly on the nature of substituents, particularly at the second carbon.
  • (12) The receptor subregion that interacts with the propyl C-1 of 1 is more tolerant of bulk and of polar substituents than the subregion that interacts with propyl C-3.
  • (13) The relative reactivities of three o-substituted phenols can be explained in terms of steric hindrance which is minimal for a single o-substituent.
  • (14) Sucrose esters were prominent surface constituents and 3-methylvaleric acid, 2- and 3-methylbutyric acid, and methylpropionic acid accounted for 60%, 25% and 9%, respectively, of total C3--C7 acyl substituents.
  • (15) In compounds with other substituents that promote activity, C-6 alpha substitution with -CH3, -Cl, or -Br strongly enhances activity; -F, -OCH3, carbonyl, or the unsubstituted compound promotes weak binding; and -OC2H5, -OAc, -OCOOCH3, or -OH eliminates binding activity.
  • (16) The hypoprothrombinemia in vitamin K-deficient female rats was caused by beta-lactam antibiotics with N-methyltetrazolethiol, thiadiazolethiol and methyl-thiadiazolethiol as the 3'-position substituent of the cephem nucleus.
  • (17) After prolonged adaptation of strain BN6 to growth on 6A2NS, this organism readily converted all naphthalene-2-sulfonates with OH- or NH2-substituents in the 5-, 6-, 7-, or 8-position.
  • (18) Six new 5(1H)oxo-2,3-dihydroimidazo[1,2-a]pyrimidine-6-carboxylic ethyl esters bearing an aromatic substituent in position 1 or 2 were obtained.
  • (19) This radioligand was selected as a synthetic target because of its potency as a 5HT3-receptor antagonist, its selectivity for this receptor viz a viz other 5HT-receptor subtypes, and the ability to readily incorporate three tritia via the indazole N-CH3 substituent.
  • (20) Instead, the latter experiment yielded 1,5-anhydro-2,3-di-O-methyl-D-mannitol, establishing the presence in the polysaccharide of terminal (nonreducing) D-mannopyranosyl groups bearing 4,6-O-(1-carboxyethylidene) substituents.

Words possibly related to "paraxylene"

Words possibly related to "substituent"