Chemotyping of new hop (Humulus lupulus L.) genotypes using comprehensive two-dimensional gas chromatography with quadrupole accurate mass time-of-flight mass spectrometry was written by Yan, Dan Dan;Wong, Yong Foo;Tedone, Laura;Shellie, Robert A.;Marriott, Philip J.;Whittock, Simon P.;Koutoulis, Anthony. And the article was included in Journal of Chromatography A in 2018.Related Products of 106-73-0 The following contents are mentioned in the article:
Comprehensive two-dimensional gas chromatog. with quadrupole accurate mass time-of-flight mass spectrometry (GC × GC-Q-TOFMS) is employed to profile Humulus lupulus L. (hop) essential oils. Comparison of characterized essential oils allows discrimination among chemotypes. Exptl. and com. hop genotypes displayed distinguishable chemotypic patterns among the volatile secondary metabolites making up their essential oils. In total, 210-306 unique compounds were detected (depending on specific genotype), with 99 of these compounds either pos. or tentatively identified. Identified volatile secondary metabolites were grouped into esters, monoterpene hydrocarbons, oxygenated monoterpenes, sesquiterpene hydrocarbons, oxygenated sesquiterpenes and ketones. Terpenoids were the dominant chem. families across all hop genotypes analyzed, representing between 67% and 90% of the total ion count. The multidimensional chromatog. profiles of hop essential oils are extremely information-rich, making GC × GC-Q-TOFMS useful for fast screening of new hybrid hop genotypes, and therefore informing breeding strategies to derive new com. hop cultivars for the development of distinctive and desirable beers. This study involved multiple reactions and reactants, such as Methyl heptanoate (cas: 106-73-0Related Products of 106-73-0).
Methyl heptanoate (cas: 106-73-0) belongs to esters. Esters are also usually derived from carboxylic acids. It may also be obtained by reaction of acid anhydride or acid halides with alcohols or by the reaction of salts of carboxylic acids with alkyl halides. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.Related Products of 106-73-0
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics