Chhabra et al., "Simultaneous quantitative profiling of N-acyl-l-homoserine lactone
and 2alkyl-4(1H)-quinolone families of quorum-sensing signaling molecules using LC-MS/MS," Analytical and Bioanalytical Chemistry, vol.
In the IR spectrum of 2-(7-methyl-2-oxo-2H-chromen-4ylmethoxy)-benzoic acid methyl ester (2b) (R = 7-C[H.sub.3]), the lactone
carbonyl stretching frequency was appeared at 1720 [cm.sup.-1], whereas the methyl ester carbonyl stretching frequency was observed at 1742 cm-.
Abstract.- Nepalese honey samples stored for 8 months showed pH in the range of 3.9-4.6, free acidity 48.5-53meq/kg, lactone
15.5-17.1meq/kg, total acidity 61-70meq/kg, electrical conductivity 0.24-0.64mS/cm, Proline content 148-241mg/kg, HMF content 53.4-122mg/kg, Diastase Number 1.02-13.25DN and Invertase Number 0.58-10.5IN.
stewartii uses 3oxohexanoyl acyl carrier protein and SAdenosylL Methionine (SAM) as substrates to make 3oxohexanoyl homoserine lactone
In this study a fraction containing the lactone
sesquiterpene onopordopicrin (ONP) from Arctium lappa was administered orally as either 25mg/kg daily or 50mg/kg daily 48, 24 and 1 hour before the induction of colitis in rats by the administration of 2,4,6 trinitrobenzene sulfonic acid (TNBS).
Eprinomectin, a semi synthetic compound, member of macrocyclic lactone
of avermectin family intended for treatment of endo and ectoparasities.
= (10:00 - ml 0.05 N HCl from burette) x 50/g sample
The XP820[TM] is the first tag worldwide to contain abamectin, a macrocyclic lactone
Xinfu also said that its lactone
project, carried out by the ChongQing Subsidiary Company, has achieved large-scale production status.
But one could argue whether this should be done with the current 5-7% terpene lactone
One possibility of preparing compound 2 is to start from 2-oxabicyclo[3.3.0]oct-6-en-3-one (Grieco lactone
) 1 , which is a commercially readily available product, in enantiomerically pure form and in multigram scale [11-14].
These low-color additive blends are non-lactone replacements for Irganox XP blends of phenolic and lactone
stabilizers, which Ciba Specialty Chemicals will phase out of production this year.