. 2017 Dec;55(4):519–530. doi: 10.17113/ftb.55.04.17.5138

Table 2. Stern-Volmer and bimolecular quenching constant values of the pancreatic lipase interaction with caffeic acid, p-coumaric acid, quercetin and capsaicin.

Compound	K_sv/(10^-4 M ^-1)	R²	k_q/(10^-13 M^-1∙s^-1)	∆F/AU
Caffeic acid	(3.7±1.2)^ab	0.9798	(2.3±0.8)^ab	(19.1±1.8)^a
p-Coumaric acid	(2.0±0.6)^ab	0.9089	(1.3±0.2)^ab	(18.7±2.3)^a
Quercetin	(4.5±0.5)^a	0.9669	(2.8±0.1)^a	(18.1±2.0)^a
Capsaicin	(0.40±0.01)^c	0.9885	(0.25±0.03)^c	(6.6±2.2)^b

ΔF corresponds to the difference between registered fluorescence intensity of analyzed compounds (caffeic acid, p-coumaric acid, quercetin and capsaicin) at c=1 and 25 µM. The data are presented as mean value±standard deviation of triplicate analyses. Different letters in the same row indicate statistically significant values (Fisher’s least significant difference analysis, p≤0.05). K_sv=Stern-Volmer quenching constant, k_q=bimolecular quenching constant, F=fluorescence intensity