Therapeutic Potential of Green Tea Catechins - A Magical Herb

Nath, Gopal; Amaladhas, N. Laxmana Naik P. Heartwin; Emerald, F. Magdaline Eljeeva

doi:10.20546/ijcmas.2021.1002.392

Cited by 3 publications

(3 citation statements)

References 35 publications

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“…The bioreducer utilized in this research is Green Tea extract. Green Tea, with a catechin content of 60-80% [20], has the highest antioxidant content among teas. Antioxidants play a crucial role in the formation process of AgNPs.…”

Section: Modification Of Membrane Using Green Synthesized Agnpsmentioning

confidence: 99%

Green-AgNPs modified membrane for monitoring mercury ions in cosmetic sample using pre-concentration assisted voltammetry technique

Fadillah,

Inayatussholeha,

Hidayat

2024

Ind. J. Chem. Anal.

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The carcinogenic and teratogenic properties of mercury have driven the necessity for the development of highly sensitive methods capable of detecting even trace amounts of the element. In response to this need, an analysis technique has been established for mercury ions, employing preconcentration methods utilizing filter paper modified by silver nanoparticles (AgNPs) and 3-Amino propyl trimethoxy silane (APTMS). This method allows for the detection of mercury ions through the voltammetry technique, ensuring accurate and reliable results. Upon conducting analyses using this method, it was found that the tested cosmetic samples were free from Hg2+ ions, indicating the absence of mercury contamination in the cosmetics under investigation. The correlation coefficient derived from the graph of the analysis results stands at an impressive value of 0.9976, affirming the strong relationship between the measured concentrations and the actual mercury content. Additionally, the method demonstrates excellent sensitivity, as evidenced by the low limit of detection (LOD) value of 0.0483 mM and the limit of quantification (LOQ) value of 0.1611 mM.

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Section: Modification Of Membrane Using Green Synthesized Agnpsmentioning

confidence: 99%

Green-AgNPs modified membrane for monitoring mercury ions in cosmetic sample using pre-concentration assisted voltammetry technique

Fadillah,

Inayatussholeha,

Hidayat

2024

Ind. J. Chem. Anal.

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“…Green tea phytochemicals are antiinfammatory (especially EGCG), antimicrobial, and anticarcinogenic because of their antioxidant properties. Tey control infammation by decreasing protein denaturation and increasing the production of anti-infammatory cytokines [11]. Both green and black teas exhibit antioxidant properties because of the polyphenols, which also reduce oxidative stress and activate DNA repair [12].…”

Section: Introductionmentioning

confidence: 99%

“…When black (oxidized) tea is orally administered, it binds afatoxins in the GIT preventing their absorption and promoting their egestion along with feces, thereby protecting the body from afatoxicity. On the other hand, catechins in green tea inhibit angiogenesis, DNA hypermethylation, proliferation, and metastasis of tumor cells, and enhance telomerase enzyme function, tumor suppressor genes, and augment tumor cell apoptosis [11]. In addition, through up-regulating superoxide dismutase and glutathione, they maintain the integrity of the mitochondria [12].…”

Section: Introductionmentioning

confidence: 99%

Effect of Extraction Period on Total Phenolics, Total Flavonoids, and Antioxidant Capacity of Ugandan Camellia sinensis (L) Kuntze, Black Primary Grades and Green Tea

Murokore

Vuzi

Wacoo

et al. 2023

Journal of Food Quality

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Introduction. Globally, the consumption and production of tea are on the rise because of its beneficial constituents. Scarce literature exists on the effects of extraction periods on the contents of the biologically important and protective phytochemicals such as phenolics, flavonoids, and antioxidants in locally produced teas in Uganda. Aim. This study determined the effects of extraction periods on the aqueous total phenolic content (TPC) of local Camella sinensis, black primary grades and green tea, and their ecological differences, their total flavonoid content (TFC), and antioxidant capacities (AOC). Methods. Samples of local tea were collected from Kigezi, Ankole, and Buganda regions, and those of green tea were purchased from a local supermarket in Uganda. Four- and 40-minute infusions were separately prepared for each sample. Total phenolic and flavonoid contents were determined using the Folin–Ciocalteu and aluminium chloride methods using garlic acid and quercetin as standards, respectively. Antioxidant content was determined using 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radical scavenging and ferric reducing assay power (FRAP) methods, using ascorbic acid as the standard. Results. Green tea had the highest total phenolic content both with four-minute (9.50 ± 0.25 mgGAE/g) and 40-minute (25.81 ± 1.13 mgGAE/g) extractions, followed by D1 (4.14 ± 0.33 mgGAE/g) at four minutes and PF (23.60 ± 2.37 mgGAE/g) at 40 minutes. Regionally, Kigezi (4.71 ± 0.09 and 22.13 ± 0.85 mgGAE/g) at four and 40 minutes, respectively, gave the highest TPC. In TFC, tea from Buganda (4,371 ± 0.00 μgQE/g) was the highest. In DPPH and FRAP, GT (93.82 ± 0.03%, 39.04 ± 0.02 AAEμg/mL) was the best, followed by Buganda tea (88.71 ± 0.03%, 36.99 ± 0.01 AAEµg/mL), respectively. Conclusion. Longer extraction periods increase TPC in all teas. Green tea generates approximately twice the TPC generated by black tea in four-minute infusions. Green tea gives higher TPC, DPPH, and FRAP but less TFC than some black teas and is perhaps the best in terms of protection against oxidative damage to the body.

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Properties of Green Tea Waste as Cosmetics Ingredients and Rheology Enhancers

et al. 2022

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Green tea waste (GTW) is a naturally abundant material, and it has not been widely reused into more valuable materials. The composition of GTW was identified using NMR for carbohydrate composition, an element analyzer for protein content, acetone and hot water extraction for evaluating extractives, and Klason lignin for lignin content. GTW can be converted into nanoparticles by carboxymethylation as pretreatment of the degree of substitutions (DS) and high-pressure homogenizer for nanoparticle making. GTW was prepared using various DS 0 until DS 0.4. The results showed that GTW DS has a more than −30 mV zeta potential, suitable for stable nanoemulsion formulations. The particle size of GTW DS decreases with increasing carboxyl content in the hydrogel, which has a width and length from GTW DS 0.3 to DS 0.4. As a humectant, the water retention value (WRV) of GTW with various DS was increased; DS 0.3 is the best. DS 0.4 has the highest viscosity, storage, and loss modulus as rheology modifiers.

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Therapeutic Potential of Green Tea Catechins - A Magical Herb

Cited by 3 publications

References 35 publications

Green-AgNPs modified membrane for monitoring mercury ions in cosmetic sample using pre-concentration assisted voltammetry technique

Green-AgNPs modified membrane for monitoring mercury ions in cosmetic sample using pre-concentration assisted voltammetry technique

Effect of Extraction Period on Total Phenolics, Total Flavonoids, and Antioxidant Capacity of Ugandan Camellia sinensis (L) Kuntze, Black Primary Grades and Green Tea

Properties of Green Tea Waste as Cosmetics Ingredients and Rheology Enhancers

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