Since no standard was available for methyl pyrogallol
and ethyl syringol, it was possible that those two compounds were also present.
All three hydroxyl groups in the pyrogallol
molecule act as hydrogen bond donors with three N atoms each from different HMTA molecules acting as acceptors.
Sun CQ, Gao Q and Liu LL: Adsorptive stripping measurements of germanium(IV) in the presence of pyrogallol
1930) 69 Ellagic acid Plant Resources of the USSR (1987) 70 Hydroquinone Zenk(1964) 71 p-galloyloxyphenyl Britton and Haslam (1965) ([beta]-D-glucoside 72 Pyrogallol
Phenolic acids Chernetsova et al.
Urinary protein as measured with a pyrogallol
red-molybdate complex, manually and in a Hitachi 726 automated analyzer.
The catechol, resorcinol, pyrogallol
and phloroglucinol were of laboratory grade.
11) that extractives such as polyflavonoid tannins, catechol, and pyrogallol
in wood form complexes with metal ions resulting in enhanced leaching of these components and their poor performance in service, notably with respect to soft-rot fungi.
transformations as catalyzed by oxides of Mn, Fe, Al and Si.
Polyphenol oxidase and peroxidase activities were determined using pyrogallol
(PG) as the substrate (Kar and Mishra 1976; Allison and Jastrow 2006).
05 ml of pyrogallol
solution and the volume was made up to 2.
The incubation mixture for peroxidase assay consisted of pyrogallol
Results are not included in Table 1, because total protein content of small peptides could not be standardized using the pyrogallol
The substrates tested included the monophenols L-tyrosine, tyrosine methyl ester, and tyramine; the diphenols 4-methylcatechol, dopamine, 3,3'-diaminobenzidene (DAB), L-3,4-dihydroxyphenylalanine (L-DOPA) and hydroquinone; and the triphenol pyrogallol
Commercial high purity nitrogen was repurified by passing through successive columns containing pyrogallol
solution, dry sulfuric acid, phosphorous pentoxide, silica gel, calcium chloride, and freshly baked molecular sieves (4A and 5A).
Total SOD activity was determined by the inhibition of pyrogallol
autoxidation by SOD (with and without sample) at 25[degrees]C and was followed kinetically at 420 nm as described by Marklund and Marklund (1974).