scholarly journals Ultrasonic Degradation Kinetics and Isomerization of 3- and 4-O-Caffeoylquinic Acid at Various Ph: The Protective Effects of Ascorbic Acid and Epigallocatechin Gallate on Their Stability

2021 ◽  
Author(s):  
Danli Wang ◽  
Jiayuan Liu ◽  
Shaoping Qiu ◽  
Jingjing Wang ◽  
Bingquan Chu ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Degradation Kinetics ◽  
Epigallocatechin Gallate ◽  
Protective Effects ◽  
Caffeoylquinic Acid ◽  
Ultrasonic Degradation

scholarly journals Degradation kinetics and isomerization of 5-O-caffeoylquinic acid under ultrasound: Influence of epigallocatechin gallate and vitamin C

2021 ◽  
pp. 100147
Author(s):  
Danli Wang ◽  
Jingjing Wang ◽  
Jiachen Sun ◽  
Shaoping Qiu ◽  
Bingquan Chu ◽  
...  
Keyword(s):  
Vitamin C ◽  
Degradation Kinetics ◽  
Epigallocatechin Gallate ◽  
Caffeoylquinic Acid

Investigation of antioxidant activity of epigallocatechin gallate and epicatechin as compared to resveratrol and ascorbic acid: experimental and theoretical insights

2021 ◽  
Author(s):  
Yamina Boulmokh ◽  
Karima Belguidoum ◽  
Faiza Meddour ◽  
Habiba Amira-Guebailia
Keyword(s):  
Antioxidant Activity ◽  
Ascorbic Acid ◽  
Epigallocatechin Gallate

scholarly journals Synergistic protective effects of ceftriaxone and ascorbic acid against subacute deltamethrin-induced nephrotoxicity in rats

Renal Failure ◽  
2014 ◽  
Vol 37 (2) ◽  
pp. 297-304 ◽  
Author(s):  
Mohamed M. Abdel-Daim ◽  
Ashraf El-Ghoneimy
Keyword(s):  
Ascorbic Acid ◽  
Protective Effects

scholarly journals Green Tea and Epigallocatechin Gallate (EGCG) for the Management of Nonalcoholic Fatty Liver Diseases (NAFLD): Insights into the Role of Oxidative Stress and Antioxidant Mechanism

Antioxidants ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 1076
Author(s):  
Guoyi Tang ◽  
Yu Xu ◽  
Cheng Zhang ◽  
Ning Wang ◽  
Huabin Li ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Fatty Liver ◽  
Green Tea ◽  
Liver Diseases ◽  
Randomized Clinical Trials ◽  
Epigallocatechin Gallate ◽  
Protective Effects ◽  
Nonalcoholic Fatty Liver ◽  
Nonalcoholic Fatty Liver Diseases ◽  
Underlying Mechanisms

Nonalcoholic fatty liver diseases (NAFLD) represent a set of liver disorders progressing from steatosis to steatohepatitis, fibrosis, cirrhosis, and hepatocellular carcinoma, which induce huge burden to human health. Many pathophysiological factors are considered to influence NAFLD in a parallel pattern, involving insulin resistance, oxidative stress, lipotoxicity, mitochondrial dysfunction, endoplasmic reticulum stress, inflammatory cascades, fibrogenic reaction, etc. However, the underlying mechanisms, including those that induce NAFLD development, have not been fully understood. Specifically, oxidative stress, mainly mediated by excessive accumulation of reactive oxygen species, has participated in the multiple NAFLD-related signaling by serving as an accelerator. Ameliorating oxidative stress and maintaining redox homeostasis may be a promising approach for the management of NAFLD. Green tea is one of the most important dietary resources of natural antioxidants, above which epigallocatechin gallate (EGCG) notably contributes to its antioxidative action. Accumulative evidence from randomized clinical trials, systematic reviews, and meta-analysis has revealed the beneficial functions of green tea and EGCG in preventing and managing NAFLD, with acceptable safety in the patients. Abundant animal and cellular studies have demonstrated that green tea and EGCG may protect against NAFLD initiation and development by alleviating oxidative stress and the related metabolism dysfunction, inflammation, fibrosis, and tumorigenesis. The targeted signaling pathways may include, but are not limited to, NRF2, AMPK, SIRT1, NF-κB, TLR4/MYD88, TGF-β/SMAD, and PI3K/Akt/FoxO1, etc. In this review, we thoroughly discuss the oxidative stress-related mechanisms involved in NAFLD development, as well as summarize the protective effects and underlying mechanisms of green tea and EGCG against NAFLD.

scholarly journals Protective effects of ascorbic acid pretreatment in a rat model of intestinal ischemia-reperfusion injury: a histomorphometric study

Clinics ◽  
2007 ◽  
Vol 62 (3) ◽  
pp. 315-320 ◽  
Author(s):  
Oscar Haruo Higa ◽  
Edwin Roger Parra ◽  
Alexandre Muxfeldt Ab'Saber ◽  
Cecilia Farhat ◽  
Rita Higa ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Reperfusion Injury ◽  
Rat Model ◽  
Intestinal Ischemia ◽  
Ischemia Reperfusion Injury ◽  
Ischemia Reperfusion ◽  
Protective Effects ◽  
Acid Pretreatment ◽  
Histomorphometric Study ◽  
Intestinal Ischemia Reperfusion

scholarly journals Relevance and Standardization of In Vitro Antioxidant Assays: ABTS, DPPH, and Folin–Ciocalteu

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Helena Abramovič ◽  
Blaž Grobin ◽  
Nataša Poklar Ulrih ◽  
Blaž Cigić
Keyword(s):  
Ascorbic Acid ◽  
Chlorogenic Acid ◽  
Gallic Acid ◽  
Caffeic Acid ◽  
Sulfonic Acid ◽  
Epigallocatechin Gallate ◽  
The Other ◽  
Oh Groups ◽  
Standard Compound

Trolox, gallic acid, chlorogenic acid, caffeic acid, catechin, epigallocatechin gallate, and ascorbic acid are antioxidants used as standards for reaction with chromogenic radicals, 2,2-diphenyl-1-picrylhydrazyl (DPPH⋅) and 2,2′-azino-bis-3-ethylbenzotiazolin-6-sulfonic acid (ABTS⋅+), and Folin–Ciocalteu (FC) reagent. The number of exchanged electrons has been analyzed as function of method and solvent. A majority of compounds exchange more electrons in FC assay than in ABTS and DPPH assays. In reaction with chromogenic radicals, the largest number of electrons was exchanged in buffer (pH 7.4) and the lowest reactivity was in methanol (DPPH) and water (ABTS). At physiological pH, the number of exchanged electrons of polyphenols exceeded the number of OH groups, pointing to the important contribution of partially oxidized antioxidants, formed in the course of reaction, to the antioxidant potential. For Trolox, small impact on the number of exchanged electrons was observed, confirming that it is more suitable as a standard compound than the other antioxidants.

The Effects of Added Water and Grinding Temperature on Stability and Degradation Kinetics of Antioxidant Activity, Phenolic Compounds, and Ascorbic Acid in Ground Apples

2018 ◽  
Vol 83 (12) ◽  
pp. 3019-3026 ◽  
Author(s):  
Ah–Na Kim ◽  
Kyo‐Yeon Lee ◽  
Hyun‐Jin Kim ◽  
Jiyeon Chun ◽  
William L. Kerr ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Ascorbic Acid ◽  
Phenolic Compounds ◽  
Degradation Kinetics ◽  
Grinding Temperature ◽  
Added Water ◽  
Kinetics Of

scholarly journals Dual colorimetric sensing of ascorbic acid and thyroxine using Ag–EGCG–CTAB via a DFT approach

RSC Advances ◽  
2021 ◽  
Vol 11 (58) ◽  
pp. 36698-36706
Author(s):  
Nirangkush Borah ◽  
Amlan Jyoti Kalita ◽  
Ankur kanti Guha ◽  
Manash R. Das ◽  
Chandan Tamuly
Keyword(s):  
Silver Nanoparticles ◽  
Ascorbic Acid ◽  
Epigallocatechin Gallate ◽  
Cost Effective ◽  
Colorimetric Sensing

In this work, a colorimetric approach for the detection of ascorbic acid and thyroxine was developed by synthesizing cost-effective silver nanoparticles (AgNPs) decorated with epigallocatechin gallate (EGCG) and CTAB.

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