What's the difference between menthol and menthyl?

Menthol


Definition:

  • (n.) A white, crystalline, aromatic substance resembling camphor, extracted from oil of peppermint (Mentha); -- called also mint camphor or peppermint camphor.

Example Sentences:

  • (1) Do [MPs] remember the madness of those advertisements that talked of the cool fresh mountain air of menthol cigarettes?
  • (2) CSCs from the 1R4F, ULT, and ULT-menthol cigarettes were cytotoxic in the CHO-HGPRT assay, both with and without metabolic activation, while TEST and TEST-menthol CSCs were not cytotoxic under either condition.
  • (3) Objective and subjective measurements of nasal patency were made before and after L-menthol stimulation of the palatal mucosa (supplied with the trigeminal nerve) in 15 normal adult subjects.
  • (4) L-menthol caused a highly significant enhancement of nasal sensation of airflow but despite their great similarity in structure and a similar peppermint smell the isomers D-isomenthol and D-neomenthol had no effect on nasal sensation of airflow.
  • (5) External application of 50 microM Ni2+ blocks the effect of CAP, but does not affect the acceleration of the high voltage-activated (L-type) current inactivation induced by menthol.
  • (6) The VAS scores showed significant changes of subjective improvement in nasal sensation of airflow (P less than 0.001) in the menthol-treated group 10 min after dosing whereas the placebo group showed no change.
  • (7) Angela Harbutt, campaigns manager of the smokers' group Forest, said: "Consumers will have mixed feelings.We welcome the fact that some products have been reprieved while menthol cigarettes have been given a stay of execution, but consumers are still angry that the EU is trying to restrict or ban products they have purchased and enjoyed for many years.
  • (8) The effect of menthol on Ca channel current inactivation was studied in identified Helix neurons.
  • (9) Since, in equal concentrations, menthol specifically impairs neuronal calcium currents, the results are consistent with the conjecture that in cold receptors, menthol reduces the activation of a calcium-stimulated outward current by an impeding effect on a calcium conductance, thereby inducing depolarization and a modification of bursting behavior.
  • (10) Application of the specific calcium channel blocker menthol (0.2 mM) suppressed spontaneous activity, the effect becoming more prominent at higher temperatures.
  • (11) In contrast, lingual fibers and a different category of cortical units ('Type II') were extremely sensitive to menthol exposure.
  • (12) TEST and TEST-menthol SSCSs produced negative results in all 5 bacterial strains, both with and without metabolic activation.
  • (13) The specificity of the Ca2(+)-channel blocking effect of menthol was demonstrated in parallel studies using compounds with similar structures: menthone blocked Ca2+ channels with about half the potency of menthol, while cyclohexanol was without effect.
  • (14) Thus, a proposed third type of Ca current with transient activation and complete deactivation below -50 mV was either not present or not affected by menthol.
  • (15) TEST and TEST-menthol CSCs were nonmutagenic in all five bacterial strains, both with and without metabolic activation.
  • (16) The effect of l-menthol on the skin permeability of mannitol, cortisone or indomethacin was examined by an in vitro penetration technique with hairless mouse skin.
  • (17) Over a couple of pints, we cover all the big stuff: Victoria Beckham, rivers of blood, what it'll be like being deputy PM to Boris ("Boris needs me; he needs lightening up"), and the attempt to ban menthol cigarettes .
  • (18) The investigations were carried out with exogenous test substances (antipyrine, menthol and sulphadimidine) and by determination of D-glucaric acid excretion.
  • (19) No significant association was observed between either short-term (1-14 years) or long-term (15+ years) menthol use and lung cancer in logistic regression analyses adjusting for covariates.
  • (20) In the second study EtOH or a placebo was administered at 1530 across three days also in the presence of menthol.

Menthyl


Definition:

  • (n.) A compound radical forming the base of menthol.

Example Sentences:

  • (1) The synthesis (Schemes I and II) requires seven steps starting with di-(-)-menthyl fumarate and employs the useful RR-phosphonate reagent 14 to attach the mevinic acid side chain to aldehyde 13.
  • (2) The method involves extraction of propranolol enantiomers from plasma into 1% 1-butanol in n-hexane at basic pH, followed by evaporation of the organic phase and the formation of diastereomeric derivatives with the chiral reagent (-)-menthyl chloroformate.
  • (3) The extracted methadone was derivatizised with (-)-menthyl chloroformate.
  • (4) Capillary gas chromatography of the O-acetylated (-)-menthyl ester of urinary glyceric acid showed the substance to have the D-configuration.
  • (5) alpha, alpha-Trehalose and alpha-menthyl glucoside proved to be inhibitors of the glucoamylase activity of the enzymes from both sources.
  • (6) The homochiral derivatizing agent, (-)-menthyl chloroformate, was found to react at the tertiary piperidine nitrogen of racemic encainide providing two menthyl carbamate diastereomers.
  • (7) Use of the methyl esters in such analyses thus avoids the cumbersome preparation of the menthyl esters.
  • (8) The glyceric acid was found to have the D-configuration, as analyzed by capillary gas chromatography of its di-O-acetyl-l-menthyl ester.
  • (9) These drugs were detected as carbamate derivatives following reaction with (-)-menthyl chloroformate.
  • (10) No epimerization at the 2-methyl carbon of pristanic acid and its methyl or (--) menthyl esters was detected after treatment in 1N aqueous or methanolic NaOH under reflux for 1 hr or at 120 degrees (sealed tube) for 24 hr.
  • (11) The absolute configurations of urinary 2-hydroxybutyrate and 3-hydroxybutyrate were determined in patients with lactic acidemia and ketosis by capillary gas-liquid chromatography of their O-acetylated (--)-menthyl ester derivatives.
  • (12) The enantiomers of dichlorprop and mecoprop were also resolved as diastereomeric menthyl esters by achiral high resolution gas chromatography (HRGC).
  • (13) The mutant phenotype is stable and heritable in the absence of selective agent, and dose--response curves for mutant frequency were obtained with N-menthyl-N'-nitro-N-nitrosoguanidine, 3-methylcholanthrene, benzo[a]-pyrene, N-acetoxy-N-2-acetylaminofluorene, and the anti-7,8-diol-9,10-epoxide of benzo[a]pyrene.
  • (14) Comparison between GLC separation of the (--) menthyl and methyl esters of two diastereoisomeric isoprenoid acids of geological interest showed that a 46 m x 0.25 mm ID butanediol succinate column gives effective separation of 2S,6R,10R- and 2R,LR,10R-isomers of (--) menthyl pristanate (2,6,10,14-tetramethylpentadecanoate), but inferior separation of the corresponding methyl ester mixture.
  • (15) This was verified by gas chromatography-mass spectrometry and the configuration determined by capillary gas chromatography of O-acetylated menthyl esters.

Words possibly related to "menthol"

Words possibly related to "menthyl"