Caption: Figure 1: A typical HPLC chromatograph showing the standard mixture of phenolic compounds, i.e.,  caffeic acid,  resorcinol,  vanillic acid,  p-coumaric acid,  ferulic acid,  vanillin,  veratric acid,  myristicin,  coumarin, and cinnamic acid.
Phenolic compound/flavonoid Amount (%) 1 Caffeic acid  3.305 2 Resorcinol  0.008 3 Vanillic acid  0.063 4 p-Coumaric acid  0.034 5 Ferulic acid  0.054 6 Vanillin  0.181 7 Veratric acid  0.015 8 Myristicin  0.013 9 Coumarin  0.004 10 Cinnamic acid 0.042 Table 2: Validation of the liquid chromatographic method.
In addition, only for the groundwater filtered from wells H4-1, 3 bottles were prepared with 70 mg of either [sup.13]C-labelled veratric acid (Sigma-Aldrich, USA) or unlabelled ([sup.12]C) veratric acid (Sigma-Aldrich, USA).
Veratric acid is a lignin-related aromatic compound and a complex organic polymer derived from plants and algae .
The characteristic UV-vis absorption peaks of veratryl alcohol, veratraldehyde, and veratric
acid appear at 277 nm, 308 nm, and 252 nm, respectively (Fig.
Standards of gallic, protocatechuic, gentisic, 4-OH-benzoic, vanillic, caffeic, syringic, p-coumaric, ferulic, salicylic, veratric
, sinapic, 3-OH-cinnamic, and rosmarinic acid, luteolin 7-glucoside, luteolin 3,7-diglucoside, rutin, hyperoside, isoquercetin, naringin, naringenin 7-glucoside, quercitrin, apigenin 7-glucoside, and LC grade acetonitrile were purchased from Sigma-Aldrich Fine Chemicals (St.
acid, a phenolic acid attenuates blood pressure and oxidative stress in L-NAME induced hypertensive rats," European Journal of Pharmacology, vol.
cassumunar rhizomes have revealed the presence of phenylbutanoids, cyclohexene derivatives, naphthoquinones, vanillin, vanillic acid, veratric
acid [2-5], terpenoids, [beta]-sitosterol, and curcuminoids [6-9].
The experiment was done by exposing 2 high laccase fungal strains to 1C to 10C potencies of HBT and ABTS over 14 days, the laccase produced assessed for activity via PAGE and colorimetric tests and the level of demethylation activity assessed after incubation with veratric
Formation and action of lignin modifying enzymes in cultures of Phlebia radiata supplemented with veratric
The standard solution of each compound (aldehyde benzoic acid, caffeic acid, p-coumaric acid, ferulic acid, quercetin, pinobanksin, cinnamic acid, apigenin, veratric
acid, and vanillin, among others) was prepared as pure compound (2-6 mg) in MeOH.
Among eighteen phenolic acids (gallic, protocatechuic, gentisic, 4-OH-benzoic, 3-OH-benzoic, vanillic, trans-caffeic, cis-caffeic, syringic, trans-p-coumaric, trans-ferulic, veratric
, salicylic, 3-OH-cinnamic, trans-sinapic, and cis-sinapic) just eight were found and quantitatively determined.