Originally meaning "pipe" or "flute" — the feathery bit at the top is the bamboo radical, indicating a section of bamboo culm — guǎn later evolved into a verb meaning "to manage" or "to be in charge of".
It confirms, on one hand, the favored formation of fulvenallenyl radical indicated by da Silva and Trevitt, but also indicates the possible formation of six-membered cyclic systems as minor products.
All amino acid changes for Type II divergence are radical, indicating a change in amino acid properties; the single exception is indicated with 'C'C
The work by Yang et al. implicating a solvent-exchangeable protein site in the H-atom back-donation to the product thyminyl radical indicated Cys141 plays a role in this process.
Quite high values of λR/R− (from 122 to 164 kJ mol−1) were found for all radicals, indicating that a significant change of structure accompanies electron transfer to R.
The increase in the inhibition of the free radicals indicate that the extracts posses high DPPH scavenging activity even at the lowest concentration.
β-sitosterol can scavenge the nitric oxide radicals generated in vitro by DPPH and NO scavenging assays by donating their hydrogen atom to quench the free radicals, indicating that β-sitosterol is a potential anti-oxidant.
One of the known biological properties of DMSO is scavenging of hydroxyl radicals, indicating that the generation of reactive oxygen species (ROS) could be implicated in the observed induction of apoptosis.
Also analysis of the kinetics of radical polymerization indicates that the linear relationship is observed when one radical obtained after PET is an initiating radical while the second type of radical terminates the chain [ 2, 3].
As expected, DPPH radical assay indicated that radical scavenging activity was dose dependent and increased with the concentration of the tested compound (Figure1).
Specifically, electron spin densities were computed to determine the distribution of unpaired spin in the iso-sinapyl radical, which indicates relative reactivity at each site, and reaction enthalpies were computed to determine the thermodynamic favorability for various potential radical conjugation reactions.
