E: The measured preceding research be indicative of predominately donor properties of FA and acceptor properties of HA employed in this study. reducing GS-626510 Technical Information capacity of CHP is 0.6 mmol/g which is corroborated by other data published for coal-derived humics [39,40]. These outcomes are in the array of values reported under equivalent situations for natural humics from soil (1.09 mmol/g), peat (2.29 mmol/g), and fresh water (six.5 mmol/g) [41].Agronomy 2021, 11, 2047 Agronomy 2021, 11, x FOR PEER REVIEW11 of11 of(A)(B)Figure five. Redox capacity (A) and antioxidant antioxidant capacity (B) ofderivatives with hydroquiFigure 5. Redox capacity (A) and capacity (B) of HA and FA HA and FA derivatives with hydronones (1,4-hydroquinone, 2-methyl-1,4-hydroquinone, 1,2-hydroquinone) and naphthoquinones quinones (1,4-hydroquinone, 2-methyl-1,4-hydroquinone, 1,2-hydroquinone) and naphthoquinones (1,4-naphthoquinone, 2-OH-1,4-naphthoquinone). (1,4-naphthoquinone, 2-OH-1,4-naphthoquinone).In the similar time, the naphthoquinone for the AOEdid not show substantial alterations Dasatinib N-oxide manufacturer Trolox Similar trends were observed derivatives values measured having a use of the in lowering capacity Antioxidant Capacity (TEAC) technique (Figure 5B). The CHP-2OHNQ Equivalent as in comparison to the parent humic supplies except for antioxidant capacity of whose decreasing derivatives outcompeted these of the essential to note that, generally, are within the FA capacity dropped substantially. It truly is HA derivatives. The obtained trends the redoxsync withvalues reported in [5] for electron donating capacities (EDCs), which accounted capacity those of the parent FA and all FA derivatives had been substantially higher as compared 0.6 those1.four the parent HA and all HA derivatives (except for catechol derivfor to and of mmol(e)/g for Aldrich HA and SRFA, respectively–mmol(e)/g. They atives). This could possibly be indicative of predominately donor properties of FAhumic and fulvic acids also corroborate effectively the findings on the antioxidant capacities of and acceptor properties of HA utilized in this study. determined with a use of ORAC technique: the Aldrich HA was characterized using a value of trends were observed the riverine FA and HA (SRFA and use of had been characterized Similar1.07 TEAC/g, whereas for the AOE values measured with aSRHA) the Trolox with a value of 1.22 and(TEAC) approach (Figure 5B). The antioxidant capacity of was also Equivalent Antioxidant Capacity 2.07 mmol TEAC/g [42]. The similar range of values reported outcompeted these of the marine DOM (0.five.0 mmol TEAC/g) [43]. the FA derivativesfor unique SPE isolates of HA derivatives. The obtained trends are in As in case in [5] for electron donating capacities (EDCs), which accounted sync with those reported of reducing capacity, the maximum AOE values had been characteristic for derivatives from the strongest HA and SRFA, respectively–mmol(e)/g. the same for 0.6 and 1.four mmol(e)/g for Aldrich donors–hydroquinone and catechol. At They alsotime, the AOE value findings on the antioxidant capacities of humic and fulvic acids decorroborate well the of 2-methylhydroquinone derivatives of HA was significantly reduced, along with the terminedlowest activity was observed the Aldrich HA of 2-OH-1,4-naphthoquinone. A threefold using a use of ORAC approach: for derivatives was characterized using a value of raise in the AOE worth of theHA (SRFA and SRHA) were characterized with 1.07 TEAC/g, whereas the riverine FA and catechol derivatives as compared to the hydroquinone derivatives could be TEAC/g [42].

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