conjugated diene

conjugated diene

[′kän·jə‚gād·əd ′dī‚ēn]
(organic chemistry)
An acyclic hydrocarbon with a molecular structure containing two carbon-carbon double bonds separated by a single bond.
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Key statement: A method of production of a modified conjugated diene rubber, including a first step of polymerizing a monomer containing at least a conjugated diene compound by using a polymerization initiator in an inert solvent so as to obtain a conjugated diene polymer having an active end, and a second step of causing a compound represented by a following formula (1) to react with the active end of the conjugated diene polymer having an active end:
(9) The investigators previously observed antioxidant activities exhibited by volatile extracts isolated from thyme (as well as various other herbs and spices) using aldehyde/carboxylic acid as well as conjugated diene assays.
The aim of our study was to determine the effect of nonalcohol Aronia melanocarpa extract on NO synthase activity, particularly NO synthase isoform protein expressions in the aorta and left ventricle, as well as their immunohistochemistry and on cytokine and conjugated diene levels on L-NAME-induced experimental model of arterial hypertension.
The sequence begins with the isomerization of LA to cis-9, trans-11 CLA, followed by the hydrogenation of the cis-double bond of the conjugated diene to yield a trans-11 octadecenoic acid (trans-vaccenic acid).
Serum conjugated diene levels of the IBS group was significantly higher than that of the control group (pless than 0.01).
Susceptibility of LDL particles to oxidation was determined from the rate of conjugated diene formation after exposure to copper chloride.
These features indicate the presence of conjugated diene and lipid hydroperoxide in the studied samples.
This kinetically preferred bromination product isomerizes readily to thermodynamically more stable E, Z-BrMe isomers, with temperatures on the order of 130 [degrees] C promoting rearrangement as well as HBr elimination to conjugated diene (6).
The plasma collected at the 6th week was used to determine total cholesterol as well as to evaluate the lipid oxidation resistance using the conjugated diene assay.
The elastic material contains a crosslinked network formed from a branched block copolymer having a monoalkenyl aromatic midblock positioned between conjugated diene endblocks (e.g., butadiene-styrene-butadiene ("B-S-B") triblock copolymer).