blocking group

blocking group

[′bläk·iŋ ‚grüp]
(organic chemistry)
In peptide synthesis, a group that is reacted with a free amino or carboxyl group on an amino acid to prevent its taking part in subsequent formation of peptide bonds.
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Participants of the Information Switch group subsequently received presentations of the blocking CS without shock (i.e., extinction training), whereas participants of the Blocking group received an equal amount of presentations of a novel CS without shock as control treatment.
Planned comparisons indeed revealed lower ratings to blocked CS Y in the Blocking group than in the Control group, F(1, 30) = 60.14, p < .001.
Results indeed revealed such a difference: Shock-expectancy ratings to the blocked CS Y were significantly higher in the Information Switch than in the Blocking group, F(1, 30) = 4.60, p < .05.
A comparison of the Control and the Blocking group indicates that selective threat appraisal was successfully induced with the present parameters: Shock-expectancy to CS Y was lower in the Blocking than in the Control group, indicative of a blocking effect.
"A minority blocking group of five countries (at least) want to decide on a definite date for the end of the opt-out.
In this second training, unlike animals in the Blocking group to which only a new landmark (X) was added in comparison to the first training, the animals in the Unblocking group also had a change in the platform position.
In this second training, unlike animals in the Blocking group for which only a new landmark (X): was added in comparison to the first training, the animals in the Unblocking group had also a change in the platform position.
Rats in the Unblocking and Blocking group were trained in the presence of A, B, and C; those in the Control group, in the presence of L, M, and N.
On the first block of four escape trials after the end of placement training with 3 landmarks, the mean latency to find the platform was 26.89 sec in the Unblocking group, 28.87 sec in the Blocking group, and 28.76 sec in the Control group.
Polyrotaxane polymers are blends in which linear polymer chains pass through cyclic polymer structures and cannot be disconnected because of blocking groups. The chains slip easily through each other without separation, leading to extreme flexibility.
The paint contains an ingredient with marine biocide properties, wherein the binder comprises a blend of the rosin material and an auxiliary film-forming resin in a ratio of 20:80 to 95:5 by weight, the auxiliary film-forming resin comprising 20-100% by weight of an acid-functional film-forming polymer whose acid groups are blocked by groups capable of hydrolyzing or dissociating to leave a polymer soluble in sea water, the blocking groups being selected from divalent metal atoms bonded to a monovalent organic residue, divalent metal atoms bonded to a hydroxyl residue and monoamine groups which form an organic solvent soluble amine salt of the polymer, and 80% to zero percent by weight of a non-hydrolyzing water-insoluble film-forming polymer.
At the same time, the offense practices against a variety of blocking groups.