Studies on the Interaction between Catechin and Metal Ions

Influence of catechin (flavan-3-ol) addition to breeder quail (Coturnix coturnix japonica) diets on productivity, reproductive performance, egg quality and yolk oxidative stability

“…The egg weight decreased 4.56% and 5.70% by 0.2% and 0.4% catechins supplementation respectively, but Ariana et al (2011) state that egg weight did not change in the 1.5% green tea powder and 0.5% green tea extract. In added catechin groups, decreased egg shell thickness and egg specific gravity were recorded, and these results were in the line with the results reported by Kojima and Yoshida (2008) and Uuganbayar et al (2005Uuganbayar et al ( , 2006 ) and form inactive stacking of polyphenols (Crespy & Williamson 2004;Bark et al 2012;Haifar 2012). Besides, green tea leaf catechins (especially epigallo catechin gallate) have potential effect on metabolism and assimilation of minerals in human and animal digestive channel (Crespy & Williamson 2004).…”

Comparison of Salt Cations in the Design of Nonionic Surfactant Based Aqueous Biphasic Systems: Application in Polyphenol Separations

“…Additionally, many polyphenols including catechin have hydrophobic composition which has a high tendency to interact with the hydrophobic core of the micellar aggregation of the surfactant . However, the lower extraction efficiency in the surfactant rich phase against MgSO 4 is due to the formation of a bivalent complex to some extent, which is also supported by the literature . The complexation is experimentally supported by the absorbance data fitted to Benesi–Hildebrand equations which yield a high stability constant of the Mg–catechin complex (5.04 × 10 3 kg/mmol) at pH 8 as compared to other pHs (calculated using eq and Figures S3–S7 and tabulated in Table ).…”

“…38 However, the lower extraction efficiency in the surfactant rich phase against MgSO 4 is due to the formation of a bivalent complex to some extent, which is also supported by the literature. 19 The complexation is experimentally supported by the absorbance data fitted to Benesi−Hildebrand equations which yield a high stability constant of the Mg− catechin complex (5.04 × 10 3 kg/mmol) at pH 8 as compared to other pHs (calculated using eq 10 and Figures S3−S7 and tabulated in Table 9). Extraction of Hesperidin in the ABS.…”

“…Catechin (5,7,3′,4′-tetrahydroxyflavan-3-ol) is one of the monomeric flavanol compounds and occurs in fruits like grapes, apple, pear, cherries, and green tea. It has established antioxidant properties against lipid peroxidation and has been demonstrated in several in vitro and ex vivo systems . The polyphenols present in tea are reported to have scavenging actions for free radicals and biologically damaging oxy radicals such as the superoxide radical and singlet oxygen. , Hesperidin is largely found in flavanone glycoside present in citrus fruits, mainly in the peel of orange and lemon.…”

Stability of Iron–Quercetin Complexes in Synthetic Wine under In Vitro Digestion Conditions

“…Spectroscopic studies based on UV‐Vis, IR, Raman spectroscopy, and theoretical methods had been developed to evaluate interaction of metal ions with polyphenols, complexation sites, and metal:ligand ratios (Severino and others ; Bark and others ). In the case of quercetin, several works have focused on studying its conformational and electronic structure (Chien and others , ).…”