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phenols (fēˑ·nlz), aromatic compounds found in some essential oils; possess strong antiseptic and antibacterial properties and also act as nerve stimulants and immunostimulants; can cause hepatotoxicity and irritate the skin.
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These compounds exert antioxidant activity by one electron reduction of the phenolic group in the chromanol moiety.
We used PCBs with 4, 5, and 6 chlorine substitutions and the phenolic group in the ortho, meta, and para positions.
The content of the carboxylic groups was much lower than of the phenolic group in the biochars, and the contents of both groups varied with the type of crop residue.
In the case of the human estrogen receptor site, a ligand with a phenolic group seems to be a common feature of most, but not all, molecules that display a substantial binding activity (8,9).
The NaHCO 3 neutralizes only the carboxylic groups on the carbon surface, simultaneously, the Na 2 CO 3 does the carboxylic and lactonic, and NaOH reacts with the carboxylic, lactonic and phenolic groups.
These results show that the efficiency of water and ethanol 80% for total phenolics extraction is dependent on the blackberry cultivar, suggesting that there are different concentrations of phenolic groups with different polarities among the samples.
In fact, the lignin available from cellulose production through the pulping process is a rather inert material, and the active phenolic groups are unfavorably changed for use as an adhesive after the pulping processes.
The second is that the efficiency with which these compounds interact with P in the soil environment is primarily determined by the arrangement of their carboxylic and phenolic groups (Fox et al.
Our work shows that the four major phenolic groups - anthocyanins, clorogenic acids, quercetin derivatives and catechins - work on different cells - fat cells, macrophages and vascular endothelial cells," he explained.
A combination of structural features, two phenolic groups as cathecolic system, forms an oxygenated system arrangement that may reflect the potentially antimicrobial properties of paepalantine.