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.

Comparative study on composition and antioxidant properties of mint and black tea extract

2008 ◽  
Vol 43 (10) ◽  
pp. 1887-1895 ◽  
Author(s):  
Ekambaram Padmini ◽  
Krishnan Prema ◽  
Bose Vijaya Geetha ◽  
Munuswamy Usha Rani
Keyword(s):  
Comparative Study ◽  
Antioxidant Properties ◽  
Black Tea ◽  
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 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

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.

scholarly journals Black Tea Extract and Its Theaflavin Derivatives Inhibit the Growth of Periodontopathogens and Modulate Interleukin-8 and β-Defensin Secretion in Oral Epithelial Cells

PLoS ONE ◽  
2015 ◽  
Vol 10 (11) ◽  
pp. e0143158 ◽  
Author(s):  
Telma Blanca Lombardo Bedran ◽  
Marie-Pierre Morin ◽  
Denise Palomari Spolidorio ◽  
Daniel Grenier
Keyword(s):  
Epithelial Cells ◽  
Black Tea ◽  
Interleukin 8 ◽  
Oral Epithelial Cells ◽  
Black Tea Extract ◽  
Tea Extract ◽  
Oral Epithelial

scholarly journals Novel Active Food Packaging Films Based on Whey Protein Incorporated with Seaweed Extract: Development, Characterization, and Application in Fresh Poultry Meat

Coatings ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 229 ◽  
Author(s):  
Mariana A. Andrade ◽  
Cássia H. Barbosa ◽  
Victor G. L. Souza ◽  
Isabel M. Coelhoso ◽  
João Reboleira ◽  
...  
Keyword(s):  
Lipid Oxidation ◽  
Whey Protein ◽  
Food Packaging ◽  
Antioxidant Properties ◽  
Radical Scavenging ◽  
Poultry Meat ◽  
Whey Protein Concentrate ◽  
Protein Film ◽  
Active Food Packaging ◽  
Freeze Dried

Algae and seaweeds are used in cookery since the beginnings of human civilization, particularly in several Asian cultures. Phenolic compounds are secondary metabolites produced by aquatic and terrestrial plants for their natural defense against external stimuli, which possess powerful antimicrobial and antioxidant properties that can be very important for the food industry. The main objective of this study was to develop a whey protein concentrate active coating, incorporated with a Fucus vesiculosus extract in order to delay the lipid oxidation of chicken breasts. Ten hydroethanolic extracts from F. vesiculosus were obtained and their antioxidant capacity was evaluated through two antioxidant activity assays: the DPPH radical scavenging activity and β-carotene bleaching assay. The total content in phenolics compounds was also determined by Folin-Ciocalteu method. The chosen extract was the one obtained from the freeze-dried F. vesiculosus using 75% (v/v) ethanol as extraction solvent. The extract was successfully incorporated into a whey protein film and successfully strengthened the thickness, tensile strength, and elastic modulus. The active film also was able to inhibit the chicken breasts lipid oxidation for 25 days of storage.

Anticancer Effect of Epitheaflagallin 3-O-Gallate, a Very Minor Constituent of Black Tea Extract

2021 ◽  
Vol 1 (8) ◽  
pp. 1428-1435
Author(s):  
Nobuya Itoh ◽  
Hiroshi Toda ◽  
Tatsuki Wakita ◽  
Yuna Yamamoto ◽  
Yoshihide Makino ◽  
...  
Keyword(s):  
Black Tea ◽  
Minor Constituent ◽  
Anticancer Effect ◽  
Black Tea Extract ◽  
Tea Extract
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