Polyphenol Content and Antioxidant Effects in Herb Teas

Toda, Shizuo

doi:10.4236/cm.2011.21005

Cited by 23 publications

(22 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Herbs can be considered as a valuable source of polyphenols -a very important group of bioactive compounds. Hence, they play an important role in the human diet and its intake can provide a lot of benefits to our body (Toda 2011). It is known that the US treatment is connected with free radical generation (Fang et al 1996;Kohno et al 2011), what can change both chemical composition and antioxidative potential of dried herbs.…”

Section: Tpc and Dpph Scavenging Activitymentioning

confidence: 99%

Drying Kinetics, Microstructure and Antioxidant Properties of Basil Treated by Ultrasound

Śledź

Wiktor

Nowacka

et al. 2015

J Food Process Engineering

View full text Add to dashboard Cite

The current study is one of the first provided data on both the quality changes and the drying kinetics of herbal material affected by ultrasound (US). The aim of this study was to investigate the influence of US prior to microwave–convective drying on the drying kinetics, water diffusivity, total phenolic content, antioxidant activity and microstructure of basil leaves. The US pretreatment was applied at different frequencies (21, 35 kHz) for variable time (20, 30 min). Application of US significantly reduced the drying time up to 20% and decreased the total specific energy consumption maximally by 26.2% in the case of 35 kHz 20 min US‐treated basil. Sonication modified the microstructure of basil, which was manifested in larger and elongated cellular spaces. Nonetheless, US did not alter the antioxidant activity and resulted in even significantly higher phenolic content in leaves treated by US at 21 kHz 20 min and at 35 kHz 30 min, compared with untreated sample. Drying coefficients of the model proposed to describe the dehydration kinetics indicated the process intensity due to the significant correlation between the drying rate and effective water diffusivity. Practical Applications Basil is a seasoning herb widely cultivated and distributed in a dried form to nearly every part of the world. Nowadays, the dried leaves are produced for consumption purpose and are intended for pharmaceutical industry, especially due to an antioxidative potential of basil. Ultrasound (US) is a nonthermal, emerging technology which intensifies the highly energy‐consuming drying process and reduces its cost. The current study is one of the first that provided data on both the quality changes and the drying kinetics of herbal material, affected by US treatment. This paper revealed the possibility of industrial utilization of US prior to the drying of herbs. Application of the recommended herein US treatment parameters results in a significant reduction of drying expenditures and improvement of the quality of herbs. It should be emphasized that both investment and operating costs of US pretreatment are negligible compared with benefits associated with decrease of drying energy consumption.

show abstract

Section: Tpc and Dpph Scavenging Activitymentioning

confidence: 99%

Drying Kinetics, Microstructure and Antioxidant Properties of Basil Treated by Ultrasound

Śledź

Wiktor

Nowacka

et al. 2015

J Food Process Engineering

View full text Add to dashboard Cite

show abstract

“…Damage of cells caused by oxidative stress is correlated to pathophysiology and pathogenesis of a wide range of diseases, i.e., Alzheimer's, Huntington's, and Parkinson's diseases, inflammatory diseases, cardiovascular diseases, diabetes, and cancer [1,3,4,[7][8][9].…”

Section: Introductionmentioning

confidence: 99%

“…For example, Nageshi et al synthesized very effective antioxidants based on the structure of chalcones and containing phenolic functional group (Figure 1e) [13]. Phenolic compounds are one of the largest groups of antioxidants with high activity [1,4,[7][8][9]14]. An example of phenolic antioxidant, which is used in medicine as an adjuvant treatment of cardiovascular diseases, metabolic syndrome, type 2 diabetes, and inflammatory diseases, is resveratrol (stilbene derivative, Figure 1f) [4].…”

Section: Introductionmentioning

confidence: 99%

New 1,3,5-Triazine Derivatives Incorporating Aminobenzenesulfonamide, Aminoalcohol, Piperazine, Chalcone or Stilbene Structural Motifs and Evaluation of Their Antioxidative Activity

Havránková

Čalkovská

Padrtova

et al. 2019

The 23rd International Electronic Conference on Synthetic Organic Chemistry

View full text Add to dashboard Cite

A series of 1,3,5-triazine derivatives, incorporating aminobenzenesulfonamide, aminoalcohol/phenol, piperazine, chalcone, or stilbene structural motifs, were evaluated as potential antioxidants. The compounds were prepared by using step by step nucleophilic substitution of chlorine atoms in starting 2,4,6-trichloro-1,3,5-triazine. Reactions were catalyzed by Cu(I)-supported on a weakly acidic resin. The radical scavenging activity was determined in terms of %inhibition activity and IC50, using the ABTS method. Trolox and ascorbic acid (ASA) were used as standards. In the lowest used concentration 1 × 10 −4 M, the %inhibition activity at time 0 min was comparable with both standards at least for 10 compounds. After 60 min compounds 1, 2, 9 and 25 showed nearly twice %inhibition (73.44-87.09%) in comparison with standards (Trolox = 41.49%; ASA = 31.07%). Values of IC50 correlated with %inhibition activity . For compounds 1, 2, 9 and 25 values of IC50 in time 60 min (17.16-27.78 μM) were 5 times lower than IC50 of both standards (Trolox = 178.33 μM; ASA = 147.47 μM). Based on these results, the presented 1,3,5-triazine derivatives and their analogs have a high potential in the treatment of illnesses caused or related to oxidative stress.

show abstract

“…Free radical-induced oxidative stress has been correlated to various pathogenesis and pathophysiology of chronic diseases including cataract, aging, atherosclerosis, Alzheimer's disease, Parkinson's disease, osteoarthritis, diabetes, and cancer as reported earlier. [1][2][3][4] Previous studies have shown that dietary antioxidant is a good cancer preventive agent, and antioxidants have been a well-practiced prescription medicine in cancer treatments to reduce side effects and increase the response rate of the therapies.…”

Section: Introductionmentioning

confidence: 99%

Antioxidant properties of ginger (Kaempferia angustifolia Rosc.) and its chemical markers

Yeap

Kassim

et al. 2017

International Journal of Food Properties

View full text Add to dashboard Cite

The nutritional value of the rhizomes of Kaempferia angustifolia was measured through the antioxidant properties of various extracts and the determination of the bioactive compounds. The chloroform and methanol extracts of the rhizomes of Kaempferia angustifolia showed strong free radical scavenging activities against 1,1-diphenyl-2-picrylhydrazyl (DPPH) with values of 615.92 mg Trolox equivalent (TE)/g each. The methanol extract also exhibited the strongest antioxidant properties in the azinobis (3-ethyl-benzothiazoline-6-sulfonic acid) (ABTS) assay with a value of 38.87 mg TE/g. The hexane extract gave the strongest reducing ability in cupric reducing antioxidant capacity (CUPRAC) assay with a value of 901.76 mg TE/ g, whilst the ethyl acetate extract exhibited the strongest reducing ability against ferric reducing antioxidant power (FRAP) with a value of 342.23 mg TE/g. Column chromatographic separation on the rhizomes of Kaempferia angustifolia afforded boesenboxide (1), crotepoxide (2), 2ˊ-hydroxy-4,4ˊ,6ˊ-trimethoxychalcone (3), kaempfolienol (4), and zeylenol (5), which were elucidated by spectroscopic methods. Kaempfolienol (4) was the strongest free radical agent against DPPH with a value of 443.92 mg TE/g, whilst 2ˊ-hydroxy-4,4ˊ,6ˊ-trimethoxychalcone (3) exhibited the strongest antioxidant properties with values of 42.23, 1497.22, and 781.53 mg TE/g against ABTS, CUPRAC, and FRAP assays, respectively. ARTICLE HISTORY

show abstract

Polyphenol Content and Antioxidant Effects in Herb Teas

Cited by 23 publications

References 18 publications

Drying Kinetics, Microstructure and Antioxidant Properties of Basil Treated by Ultrasound

Drying Kinetics, Microstructure and Antioxidant Properties of Basil Treated by Ultrasound

New 1,3,5-Triazine Derivatives Incorporating Aminobenzenesulfonamide, Aminoalcohol, Piperazine, Chalcone or Stilbene Structural Motifs and Evaluation of Their Antioxidative Activity

Antioxidant properties of ginger (Kaempferia angustifolia Rosc.) and its chemical markers

Contact Info

Product

Resources

About