Comparison of Antioxidant Activities and High-Performance Liquid Chromatography Analysis of Polyphenol from Different Apple Varieties

A comparison of the chemical composition and antioxidant activity of several new early‐ to mid‐season apple cultivars for a warmer climate with traditional cultivars

“…Fuji apples contained higher epicatechin levels (451.9 μg g −1 DW) than Fuji apples grown in Europe (250 μg g −1 DW) in the peel, after correcting FW to DW on the basis of a 90% estimated moisture content . Yellow‐skinned apple cultivars Summer King and Hwangok apples contained higher epicatehin levels (184.8 and 405.7 μg g −1 DW, respectively) than Golden Delicious apples grown in the USA (71.2 μg g −1 DW) and China (172.8 μg g −1 DW) in the peel . The peel of Fuji apples contained lower catechin levels (242.4 μg g −1 DW) than the peel of Fuji apples grown in Europe (290–750 μg g −1 DW) and higher catechin levels than the peel of Fuji apples grown in China (17.3 μg g −1 DW), after correcting FW to DW on the basis of a 90% estimated moisture content.…”

A theoretical study of adsorption of tyrosol derivatives as antioxidant drugs on the boron nitride (BN)-nanotube (9, 0) surface

“…Structure BDE IP BDE IP BDE IP tyrosol 343 677 338 680 339 683 NHMe-tyrosol 305 611 301 614 302 617 OMe-tyrosol 322 639 320 642 321 645 tert-butyl-tyrosol 331 656 329 659 330 662 The average absolute deviations of the ΔIP values of substituted tyrosols and those of phenols in Table 3 were 3 and 5 kJ mol −1 , respectively. Therefore, results show that, published ΔBDE and ΔIP values of phenols [5,6,21,28] and ΔBDE and ΔIP values of tyrosols in present article have same trends.…”

“…The experimental IP values were obtained by using of the electron impact technique (EIT) method. [5,6,21,28] The average absolute deviations of the ΔBDE values of tyrosols and those of phenols in Table 3 were 2 and 6 kJ mol −1 , respectively. Table 1.…”

“…In recent years, the antioxidant activity of important antioxidant compounds have been investigated. [21][22][23][24][25][26][27][28][29][30] In this section, the effects of NHMe, OMe, and tert-butyl substituents on the BDE and IP values of tyrosol were investigated, in order to find the novel tyrosol derivatives with high level of antioxidant activity. This work represents the first systematic study of antioxidant activity of substituted tyrosol derivatives by using of theoretical methods.…”

Detection and analysis of triterpenic compounds in apple extracts

“…Apples are among the most commonly consumed fruit in the world. [1] They are widely used in food industry for the manufacturing of various products and drinks (e.g. juice, wine, or cider), and are also used unprocessed.…”