scholarly journals Analysis of antioxidant activity of black tea extract (Camellia sinensis L.) and the effect on organoleptic properties of cassava getuk

2021 ◽  
Author(s):  
Zjahra V. Nugraheni ◽  
Wahyu D. Gunawan ◽  
Hidayah N. Laili ◽  
Herdayanto S. Putro ◽  
Agus Wahyudi
Keyword(s):  
Antioxidant Activity ◽  
Camellia Sinensis ◽  
Black Tea ◽  
Organoleptic Properties ◽  
Black Tea Extract ◽  
Tea Extract

scholarly journals Effect of black tea extract (Camellia sinensis) on antioxidant activity of pukis

2021 ◽  
Author(s):  
Zjahra V. Nugraheni ◽  
Hidayah N. Laili ◽  
Wahyu D. Gunawan ◽  
Herdayanto S. Putro ◽  
Agus Wahyudi ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Camellia Sinensis ◽  
Black Tea ◽  
Black Tea Extract ◽  
Tea Extract

scholarly journals Development and Characterization of Functional Starch-Based Films Incorporating Free or Microencapsulated Spent Black Tea Extract

Molecules ◽  
2021 ◽  
Vol 26 (13) ◽  
pp. 3898
Author(s):  
Surakshi Wimangika Rajapaksha ◽  
Naoto Shimizu
Keyword(s):  
Antioxidant Activity ◽  
Lipid Oxidation ◽  
Food Packaging ◽  
Uv Light ◽  
Antioxidant Properties ◽  
Black Tea ◽  
Wall Material ◽  
Food Simulants ◽  
Black Tea Extract ◽  
Tea Extract

Antioxidant polyphenols in black tea residue are an underused source of bioactive compounds. Microencapsulation can turn them into a valuable functional ingredient for different food applications. This study investigated the potential of using spent black tea extract (SBT) as an active ingredient in food packaging. Free or microencapsulated forms of SBT, using a pectin–sodium caseinate mixture as a wall material, were incorporated in a cassava starch matrix and films developed by casting. The effect of incorporating SBT at different polyphenol contents (0.17% and 0.34%) on the structural, physical, and antioxidant properties of the films, the migration of active compounds into different food simulants and their performance at preventing lipid oxidation were evaluated. The results showed that adding free SBT modified the film structure by forming hydrogen bonds with starch, creating a less elastic film with antioxidant activity (173 and 587 µg(GAE)/g film). Incorporating microencapsulated SBT improved the mechanical properties of active films and preserved their antioxidant activity (276 and 627 µg(GAE)/g film). Encapsulates significantly enhanced the release of antioxidant polyphenols into both aqueous and fatty food simulants. Both types of active film exhibited better barrier properties against UV light and water vapour than the control starch film and delayed lipid oxidation up to 35 d. This study revealed that starch film incorporating microencapsulated SBT can be used as a functional food packaging to protect fatty foods from oxidation.

scholarly journals FORMULATION OF LOTION FROM BLACK TEA EXTRACT (CAMELLIA SINENSIS LINNAEUS) AS SUNSCREEN

2019 ◽  
Vol 11 (1) ◽  
pp. 205 ◽  
Author(s):  
Iyan Sopyan ◽  
Riestya Dwi Permata ◽  
Dolih Gozali ◽  
Insan Sunan Kurniawan Syah
Keyword(s):  
Camellia Sinensis ◽  
Black Tea ◽  
Ultraviolet Rays ◽  
Tea Leaves ◽  
Security Testing ◽  
Black Tea Extract ◽  
Emulsifying Agent ◽  
Irritation Test ◽  
Tea Extract ◽  
Tea Leaf

Objective: The goal of the project was to explore extracts from black tea leaves (Camellia sinensis Linnaeus) to prove it can give protection against ultraviolet rays (UV) in lotion preparation.Methods: Black tea extract was made in sunscreen lotion in oil in water (O/W) type emulsion using a combination of PEG-8 and beeswax as emulsifying agent 1, and combination of cetyl alcohol, ceteth-20, and steareth-20 as emulsifying agent 2. Evaluation of lotion including phytochemical screening of black tea leaf extract, measurement of sun protecting factor (SPF) value of extract black tea leaves, measurement of SPF preparation lotion sunscreen extract black tea leaves, physical observation of preparation, qualitative preparation evaluation using thin layer chromatography (TLC) and lotion security testing have been done to ensure the quality of lotions.Results: The result exhibited the effective SPF that was different to the sunscreen lotion F1, which contained 0.03% w/v and F2 which contain of 0.04% w/v black tea leaves extract with the point of SPF is 20.31 and 24.71 respectively. Both formulas fulfilled the requirements as lotion preparations and did not irritate the skin based on an irritation test on 20 volunteers.Conclusion: Formulas F1 and F2 can be applied as a sunscreen with good physical quality and is safe for topical use in lotion preparation.

Phytoestrogenic effects of black tea extract (Camellia sinensis) in an oophorectomized rat (Rattus norvegicus) model of osteoporosis

Life Sciences ◽  
2005 ◽  
Vol 77 (24) ◽  
pp. 3049-3057 ◽  
Author(s):  
Asankur Sekhar Das ◽  
Dolan Das ◽  
Maitrayee Mukherjee ◽  
Sandip Mukherjee ◽  
Chandan Mitra
Keyword(s):  
Camellia Sinensis ◽  
Rattus Norvegicus ◽  
Black Tea ◽  
Black Tea Extract ◽  
Tea Extract

Theaflavin Enriched Black Tea Extract Alleviates Diabetic Nephropathy by Suppressing Hyperglycaemia-Mediated Oxidative Stress and Inflammation in Streptozotocin-Induced Rats

2020 ◽  
Vol 10 ◽  
Author(s):  
Dhrubajyoti Sarkar ◽  
Sekhar Kumar Bose ◽  
Tania Chakraborty ◽  
Souvik Roy
Keyword(s):  
Oxidative Stress ◽  
Diabetic Nephropathy ◽  
Blood Glucose ◽  
Blood Urea Nitrogen ◽  
Phenolic Content ◽  
Black Tea ◽  
Total Phenolic ◽  
Urea Nitrogen ◽  
Black Tea Extract ◽  
Tea Extract

Background: Diabetic nephropathy (DN), a microvascular complication of diabetes has been a significant health issue globally. However, theaflavin enriched black tea extract (BTE-TF) could restrain DN. Objective: The main objective of this exploration was to elucidate the effect of BTE-TF on DN, though the underlying mechanism remains unclear and requires further investigation. Method: The tea leaves were fermented to get black tea extract. Total phenolic content and HPLC were carried out to determine the phenolic content and theaflavin in the extract. Streptozotocin induced diabetic rats were treated with 100, 200, and 400 mg/kg/day BTE-TF extract for 12 weeks. Biochemical parameters like blood glucose, creatinine, blood urea nitrogen (BUN), triglyceride and antioxidant parameters of kidney tissue were measured. Histology, immunohistochemistry and TUNEL assay were performed to observe the effect of the extract with comparison to the standard drug (Metformin 200mg/kg/day). Result: Treated animals exhibited reduced blood glucose levels, blood urea nitrogen (BUN), creatinine, and serum triglycerides. Further, BTE-TF restored the histological alterations in the kidney. Chronic hyperglycaemia resulted in a significant increase in oxidative stress and pro-inflammatory cytokines of NF-kβ pathway. BTE-TF attenuated oxidative stress (p<0.01), inflammation (p<0.05) and apoptosis (p<0.05). Conclusion: This study suggests that BTE-TF exerts a protective role against diabetes-induced renal injury by ameliorating oxidative stress, inflammation, and apoptosis.

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