Characteristics of the Polyphenolic Profile and Antioxidant Activity of Cone Extracts from Conifers Determined Using Electrochemical and Spectrophotometric Methods

Latos‐Brozio, Malgorzata; Masek, Anna; Chrześcijańska, Ewa; Podsędek, Anna; Kajszczak, Dominika

doi:10.3390/antiox10111723

Cited by 16 publications

(12 citation statements)

References 40 publications

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“…Microansamycin is a member of the macrolactams family, important bioactive compounds with anti-tuberculous and anti-tumor activity 55 . Similarly, its host, the Korean fir, produces rich polyphenol compounds like quercetin (flavonoid) and carotenoids to provide the strong antioxidant properties of Korean fir 56 . The essential oil of Korean fir includes the terpene group (monoterpenes, oxygenated monoterpenes, sesquiterpenes, diterpenes, and limonene) 57 , 58 which also have strong antioxidant, antimicrobial, and anti-inflammatory activities 1 , 4 .…”

Section: Resultsmentioning

confidence: 99%

Subtercola endophyticus sp. nov., a cold-adapted bacterium isolated from Abies koreana

Jiang

Peng

Seo

et al. 2022

Sci Rep

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A novel Gram-stain-positive, aerobic bacterial strain, designated AK-R2A1-2 T, was isolated from the surface-sterilized needle leaves of an Abies koreana tree. Strain AK-R2A1-2 T had 97.3% and 96.7% 16S rRNA gene sequence similarities with Subtercola boreus K300T and Subtercola lobariae 9583bT, respectively, but formed a distinct phyletic lineage from these two strains. Growth of strain AK-R2A1-2 T was observed at 4–25 °C at pH 5.0–8.0. Strain AK-R2A1-2 T contained menaquinone 9 (MK-9) and menaquinone 10 (MK-10) as the predominant respiratory quinones. The major cellular fatty acids were anteiso-C15:0 and summed feature 8 (C18:1ω7c or/and C18:1ω6c), and the polar lipids included diphosphatidylglycerol (DPG) and three unknown aminolipids, AKL2, AKL3, and AKL4. The complete genome of strain AK-R2A1-2 T was sequenced to understand the genetic basis of its survival at low temperatures. Multiple copies of cold-associated genes involved in cold-active chaperon, stress response, and DNA repair supported survival of the strain at low temperatures. Strain AK-R2A1-2 T was also able to significantly improve rice seedling growth under low temperatures. Thus, this strain represents a novel species of the genus Subtercola, and the proposed name is Subtercola endophyticus sp. nov. The type strain is AK-R2A1-2 T (= KCTC 49721 T = GDMCC 1.2921 T).

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Section: Resultsmentioning

confidence: 99%

Subtercola endophyticus sp. nov., a cold-adapted bacterium isolated from Abies koreana

Jiang

Peng

Seo

et al. 2022

Sci Rep

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“…DPV and SWV are more sensitive compared to CV and have been used more often for the characterization of medicinal plant extracts. Similarly to CV, oxidation peaks are registered on the voltammograms (Figure 13B) [117]. The oxidation potentials are reflected by the antioxidant constituents, and the oxidation currents depend on the concentration of the antioxidants.…”

Section: Methods Based On the Oxidation Of Antioxidants On Electrodesmentioning

confidence: 95%

Electrochemical Characterization of the Antioxidant Properties of Medicinal Plants and Products: A Review

Ziyatdinova

Kalmykova

2023

Molecules

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Medicinal plants are an important source of bioactive compounds with a wide spectrum of practically useful properties. Various types of antioxidants synthesized in plants are the reasons for their application in medicine, phytotherapy, and aromatherapy. Therefore, reliable, simple, cost-effective, eco-friendly, and rapid methods for the evaluation of antioxidant properties of medicinal plants and products on their basis are required. Electrochemical methods based on electron transfer reactions are promising tools to solve this problem. Total antioxidant parameters and individual antioxidant quantification can be achieved using suitable electrochemical techniques. The analytical capabilities of constant-current coulometry, potentiometry, various types of voltammetry, and chrono methods in the evaluation of total antioxidant parameters of medicinal plants and plant-derived products are presented. The advantages and limitations of methods in comparison to each other and traditional spectroscopic methods are discussed. The possibility to use electrochemical detection of the antioxidants via reactions with oxidants or radicals (N- and O-centered) in solution, with stable radicals immobilized on the electrode surface, via oxidation of antioxidants on a suitable electrode, allows the study of various mechanisms of antioxidant actions occurring in living systems. Attention is also paid to the individual or simultaneous electrochemical determination of antioxidants in medicinal plants using chemically modified electrodes.

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“…Another important point is the extracted faradaic current which results in analyzing the electrode reactions more precisely [ 59 ]. It is also used effectively to measure the antioxidant capacity of food [ 60 ], plant extracts [ 61 ], and polyphenolic compounds such as procyanides and catechins from cone extracts which showed significant ability to reduce oxidative stress, scavenge free radicals, and transitions metal ions as well [ 62 , 63 , 64 ].…”

Section: Electrochemical Methodologiesmentioning

confidence: 99%

Electrochemical Methodologies for Investigating the Antioxidant Potential of Plant and Fruit Extracts: A Review

et al. 2022

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In recent years, the growing research interests in the applications of plant and fruit extracts (synthetic/stabilization materials for the nanomaterials, medicinal applications, functional foods, and nutraceuticals) have led to the development of new analytical techniques to be utilized for identifying numerous properties of these extracts. One of the main properties essential for the applicability of these plant extracts is the antioxidant capacity (AOC) that is conventionally determined by spectrophotometric techniques. Nowadays, electrochemical methodologies are emerging as alternative tools for quantifying this particular property of the extract. These methodologies address numerous drawbacks of the conventional spectroscopic approach, such as the utilization of expensive and hazardous solvents, extensive sample pre-treatment requirements, long reaction times, low sensitivity, etc. The electrochemical methodologies discussed in this review include cyclic voltammetry (CV), square wave voltammetry (SWV), differential pulse voltammetry (DPV), and chronoamperometry (CAP). This review presents a critical comparison between both the conventional and electrochemical approaches for the quantification of the parameter of AOC and discusses the numerous applications of the obtained bioextracts based on the AOC parameter.

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Characteristics of the Polyphenolic Profile and Antioxidant Activity of Cone Extracts from Conifers Determined Using Electrochemical and Spectrophotometric Methods

Cited by 16 publications

References 40 publications

Subtercola endophyticus sp. nov., a cold-adapted bacterium isolated from Abies koreana

Subtercola endophyticus sp. nov., a cold-adapted bacterium isolated from Abies koreana

Electrochemical Characterization of the Antioxidant Properties of Medicinal Plants and Products: A Review

Electrochemical Methodologies for Investigating the Antioxidant Potential of Plant and Fruit Extracts: A Review

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