In homogeneous catalysis, catalysts are in the same phase as the reactants. Catalysts allow a reaction to proceed via a pathway that has a lower activation energy than the uncatalyzed reaction.957-68-6, Name is 7-Aminocephalosporanic acid, SMILES is CC(OCC(CS[C@@]([H])(N12)[C@H](N)C2=O)=C1C(O)=O)=O, belongs to quinuclidines compound. In a document, author is Boskovic, Perica, introduce the new discover, SDS of cas: 957-68-6.
The Aggregation Behavior and Antioxidative Activity of Amphiphilic Surfactants Based on Quinuclidin-3-ol
The self-aggregation and thermodynamic properties of three cationic quaternary ammonium surfactants were investigated. The physicochemical properties of compounds containing quinuclidin-3-ol with even number of carbon atoms (10, 12, and 14) in the hydrophobic tail were measured by conductivity, dynamic light scattering (DLS), and Zeta-potential measurements. DLS and Zeta-potential measurements show a similar size distribution for all surfactants with excellent uniformity, and Zeta-potential increases significantly with increase in the size of hydrocarbon tail. The critical micelle concentration (CMC) and the degree of micelle ionization (beta) were determined using conductivity measurements. The CMC values of surfactants were found to be between 3.4 and 23.8 x 10(-3) M. The standard Gibbs free energy (Delta Gmico) was derived from conductivity measurements and suggests that surfactants containing longer chains spontaneously form micelles. The antioxidative properties of these cationic surfactants were evaluated using the 2,2-diphenyl-1-picrylhydrazyl (DPPH) and oxygen radical absorbance capacity (ORAC) assays. Among the tested samples, N-tetradecyl-3-hydroxyquinuclidinium bromide (QOH-C14) exhibited the highest antioxidative potential (388.30 nmol (TE) equivalents mL(-1)), which was further investigated by the DNA nicking assay.
The reactant in an enzyme-catalyzed reaction is called a substrate. Enzyme inhibitors cause a decrease in the reaction rate of an enzyme-catalyzed reaction.Interested yet? Keep reading other articles of 957-68-6, you can contact me at any time and look forward to more communication. SDS of cas: 957-68-6.
Reference:
Quinuclidine – Wikipedia,
,Quinuclidine | C7H13N | ChemSpider