scholarly journals Stability of total phenolic and antioxidant capacity in ready-to-drink black and green tea formulations

2020 ◽  
Vol 9 (10) ◽  
pp. e219108160
Author(s):  
Kristtiann Yuri Coelho ◽  
Adilson Assis de Oliveira ◽  
Maria Helena Nasser Brumano ◽  
Priscila Cardoso Fidelis
Keyword(s):  
Antioxidant Capacity ◽  
Green Tea ◽  
Room Temperature ◽  
Phenolic Content ◽  
Black Tea ◽  
Total Phenolic ◽  
Antioxidant Compounds ◽  
Frap Assay ◽  
The Stability ◽  
Bioactive Potential

Teas are rich in antioxidant compounds and many ready-to-drink teas are being developed with great acceptance in the market. However, the bioactive potential for these products should be preserved during the storage. The aim of this work was to evaluate changes in total phenolic content (TPC) and antioxidant capacity (AC) from six formulations of green and black ready-to-drink teas, stored in the dark or exposed to light during eight weeks at room temperature. The stability was evaluated every two weeks by measuring TPC by Folin-Ciocalteu and AC by ABTS and FRAP assays. In the absence of light TPC of green tea remained stable throughout the storage, but it dropped after two weeks when exposed to light. TPC for black tea decreased after four and two weeks, in the absence and presence of light, respectively. The AC for green tea decreased after two weeks, in the presence of light, however the decay was greater for the FRAP assay. In the absence of light, changes in AC for black tea were observed only for samples assayed by FRAP after two weeks. A reduction in the AC (FRAP and ABTS) occurred after four weeks for both samples exposed to light. The results show that to retain the majority of their TPC and AC these tea drinks should be commercialized in opaque packages and stored for up to eight weeks.

scholarly journals Relationship between Total Phenolic Content, Antioxidant Capacity, Fe and Cu Content from Tea Plant Samples at Different Brewing Times

Processes ◽  
2021 ◽  
Vol 9 (8) ◽  
pp. 1311
Author(s):  
Simona Dobrinas ◽  
Alina Soceanu ◽  
Viorica Popescu ◽  
Ionela Carazeanu Popovici ◽  
Daniela Jitariu
Keyword(s):  
Antioxidant Capacity ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Pearson Correlation ◽  
Black Tea ◽  
Tea Plant ◽  
Total Phenolic ◽  
Antioxidant Compounds ◽  
Cu Content ◽  
Tea Infusions

The purpose of this study was to investigate the antioxidant capacity of different tea plant: mint, linden, chamomile, St. John’s wort, green and black tea in relation to total phenolic content. The antioxidant capacity of the tea infusions at different brewing times was determined using DPPH assay while the total phenolic content (TPC) was assessed using the modified Folin-Ciocalteu method. The results showed that there were significant statistical differences in antioxidant capacity depending on infusion time, according to one-way ANOVA analysis. Leaves used as components of tea infusions were analyzed by FAAS for their content of iron and copper in the dry product and in the infusion. The correlation between TPC and DPPH capacity of tea plant infusions was evaluated by Pearson correlation matrix. Total phenolics compounds content was positively and significantly correlated with DPPH capacity for all infusions time. Significant correlation was observed between TPC and the copper concentration (p < 0.05). Consequently, the correlations between the physicochemical parameters, TPC, DPPH capacity, Fe and Cu content suggested that the TPC may be a good indicator of the DPPH capacity in the tea infusions and also, suggested the influence of antioxidant compounds on mineral bioavailability.

scholarly journals Antioxidant Capacity and Total Phenolic Content in Fruit Tissues from Accessions ofCapsicum chinenseJacq. (Habanero Pepper) at Different Stages of Ripening

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Lizbeth A. Castro-Concha ◽  
Jemina Tuyub-Che ◽  
Angel Moo-Mukul ◽  
Felipe A. Vazquez-Flota ◽  
Maria L. Miranda-Ham
Keyword(s):  
Antioxidant Capacity ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Antioxidant Activities ◽  
Placental Tissue ◽  
Trolox Equivalent Antioxidant Capacity ◽  
Total Phenolic ◽  
Antioxidant Compounds ◽  
Agricultural Crop ◽  
Habanero Pepper

In the past few years, there has been a renewed interest in studying a wide variety of food products that show beneficial effects on human health.Capsicumis an important agricultural crop, not only because its economic importance, but also for the nutritional values of its pods, mainly due to the fact that they are an excellent source of antioxidant compounds, and also of specific constituents such as the pungent capsaicinoids localized in the placental tissue. This current study was designed to evaluate the antioxidant capacity and total phenolic contents from fruits tissues of twoCapsicum chinenseaccessions, namely, Chak k’an-iik (orange) and MR8H (red), at contrasting maturation stages. Results showed that red immature placental tissue, with a Trolox equivalent antioxidant capacity (TEAC) value of 55.59 μmols TE g−1 FW, exhibited the strongest total antioxidant capacity using both the 2,2-diphenyl-1-picrylhydrazyl (DPPH) and the CUPRAC methods. Placental tissue also had the highest total phenolic content (27 g GAE 100 g−1 FW). The antioxidant capacity ofCapsicumwas directly related to the total amount of phenolic compounds detected. In particular, placentas had high levels of capsaicinoids, which might be the principal responsible for their strong antioxidant activities.

Antioxidant activity, total phenolic and flavonoids contents of three herbs used as condiments and additives in pickles products

2013 ◽  
Vol 59 (3) ◽  
pp. 51-62 ◽  
Author(s):  
Abdollah Ghasemi Pirbalouti ◽  
Milad Setayesh ◽  
Amir Siahpoosh ◽  
Hamid Mashayekhi
Keyword(s):  
Antioxidant Activity ◽  
Antioxidant Capacity ◽  
Total Phenolic Content ◽  
Food Industry ◽  
Phenolic Content ◽  
Food Additives ◽  
Total Phenolic ◽  
Endemic Plants ◽  
Dpph Assay ◽  
Frap Assay

Abstract Heracleum lasiopetalum Boiss, Kelussia odoratissima Mozaff., and Echinophora platyloba DC. belong the Apiaceae family. They are Iranian endemic plants. These three herbs have been used as food additives in traditional preparations such as pickles. Antioxidant activity (AA) of methanol extracts (ME) of the plants was evaluated by three assays, including DPPH, FRAP, and TEAC. From all three assays, comparing all the MEs for their IC50 and EC1 values, E. platyloba had the highest AA. Total phenolic content (TPC) of the extracts ranged from 74 to 120 mg TAE/g. The extract of H. lasiopetalum exhibited the highest TPC. The flavonoids content (FC) of the extracts ranged from 7.63 to 14.52 mg RE/g, from which the extract of E. platyloba had the highest flavonoids concentration. A positive correlation between the FC and AA in DPPH assay was found. A significant correlation was also found between the TPC and AA in FRAP assay. These results suggested that the level of AA in these plants varied in a great extent. Our results indicated that extract of E. platyloba could be an important dietary source of flavonoids compounds with high antioxidant capacity. In addition, E. platyloba can be used as an alternative preservative and natural flavor instead of synthetic ones in food industry (especially pickles)

scholarly journals Stability of the Ellagitannin Fraction and Antioxidant Capacity of Varietal Pomegranate Juices

2015 ◽  
Vol 10 (6) ◽  
pp. 1934578X1501000
Author(s):  
Pedro Mena ◽  
Cristina García-Viguera
Keyword(s):  
Antioxidant Capacity ◽  
Ellagic Acid ◽  
Phenolic Content ◽  
Punica Granatum ◽  
In Vitro Assays ◽  
Total Phenolic ◽  
Promising Alternative ◽  
The Stability ◽  
Punica Granatum L

This work aimed to assess the effect of combining two pomegranate (Punica granatum L.) cultivars at different rates on the ellagitannin content, antioxidant capacity, and total phenolic content of varietal pomegranate juices. Widely distinct juices made from Mollar de Elche and Wonderful cultivars were used for the elaboration of blended juices. They were stored for 70 days at both room and refrigeration temperatures. This study revealed a significant cultivar effect on the stability of main pomegranate ellagitannins (punicalagins, punicalins, punicalagin-like compound, and ellagic acid derivatives) and on the antioxidant capacity measured by the ABTS+ and DPPH• in vitro assays. Blended juices enhanced and/or retained the initial ellagitannin content and antioxidant capacity of pure juices during storage. Thus, blending varietal juices could be suggested as a promising alternative to the development of fresh juices with a high, stable phytochemical load.

scholarly journals Effect of Brewing Method on Quality Parameters and Antioxidant Capacity of Black Tea

2021 ◽  
Vol 1 (8) ◽  
pp. 1
Author(s):  
Zeynep B. Guzel-Seydim ◽  
Atif Can Seydim ◽  
Annel K. Greene
Keyword(s):  
Antioxidant Capacity ◽  
Phenolic Content ◽  
Black Tea ◽  
Quality Parameters ◽  
Total Phenolic ◽  
Tea Leaves ◽  
Total Polyphenols ◽  
Brewing Method ◽  
Functional Components ◽  
Brewing Time

Introduction: The traditional method for brewing tea in Turkey involves use of a two-vessel apparatus known as a “caydanlik.” The caydanlik allows for tea to be brewed for a longer time than typical brewing methods and involves introducing boiling water to tea leaves and steeping them in a teapot as the temperature declines over 15 minutes. In comparison, the typical tea brewing method used in other parts of the world involves steeping tea leaves in a single vessel teapot for 5 minutes. This study evaluated the effects of these two methods of brewing using two brands of tea.  Results: Results of this experiment indicate that use of the caydanlik and the accompanying longer brewing time significantly changed key quality parameters and increased the antioxidant capacity of the brewed black tea beverage. Use of the caydanlik method resulted in significantly higher (P < 0.05) theaflavins, thearubigins, theabrownins, and total polyphenols in the resultant tea than in tea brewed in a traditional teapot. Additionally, analysis of color values of the brewed tea indicated the L and b-values were significantly (P < 0.05) lower in the caydanlik brewed tea while a and hue values were significantly higher (P < 0.05). However, chroma values were not significantly different (P < 0.05) between the two methods.   Conclusions: In addition to influencing color, flavor and aroma, the brewing method also influenced the functional properties of prepared black tea. Use of the traditional two-vessel caydanlik for tea preparation increased concentrations of beneficial functional components in the tea.Keywords: Black tea, Caydanlik, Brewing, Camelia sinensis, ORAC, Total Phenolic Content 

scholarly journals EVALUATION OF PHARMACOLOGICAL STABILITY OF PERILLA OIL AND PERILLA OIL CAPSULE

2019 ◽  
pp. 518-522
Author(s):  
CHAIYAVAT CHAIYASUT ◽  
BHAGAVATHI SUNDARAM SIVAMARUTHI ◽  
PERIYANAINA KESIKA ◽  
SASITHORN SIRILUN ◽  
NETNAPA MAKHAMRUEANG ◽  
...  
Keyword(s):  
Antioxidant Capacity ◽  
Phenolic Content ◽  
Storage Period ◽  
Storage Conditions ◽  
Total Phenolic ◽  
Perilla Oil ◽  
Peroxide Values ◽  
Assay Methods ◽  
The Stability ◽  
Physical Changes

Objective: The present study explained the effect of storage conditions on the stability (total phenolic content (TPC), acid and peroxide values, and antioxidant capacity) of free perilla oil (PO) and capsulated PO (POC). Methods: PO from Mae Hong Son cultivar was used for making POC. The capsules were prepared by Nature Nutri Co., Ltd., Pathum Thani, Thailand. PO and POC samples were stored in different containers (plastic, glass, clear, and amber bottles) at various temperatures (4, 30, and 40°C) for 3 months. The physical changes (color, odor, sedimentation, and separations), TPC, and antioxidant capacity of the samples were assessed by organoleptic, Folin–Ciocalteu colorimetric, and 1,1-diphenyl-2-picrylhydrazyl and 2,2′-azino-bis-3-ethylbenzthiazoline-6-sulfonic acid assay methods, respectively. The acid and peroxide values of the samples were also studied by the titration method. Results: The color and odor of PO were not changed during storage, and also, there was no sedimentation and layer separation. The acid values were not significantly changed during the storage period, but the peroxide values were significantly increased in PO samples stored at 40°C while no changes were observed in POC. The TPC and antioxidant capacity of the samples were not influenced by any of the storage conditions. Conclusion: The results suggested that POC was relatively more stable than free oil in terms of peroxidation.

Investigation of total antioxidant capacity and total poly phenols of black tea in Iranian markets

2021 ◽  
Author(s):  
Naficeh Sadeghi ◽  
Masoomeh Behzad ◽  
Behrooz Jannat ◽  
Mannan Hajimahmoodi ◽  
Mohammad Reza Oveisi ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Antioxidant Capacity ◽  
Total Antioxidant Capacity ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Black Tea ◽  
Total Phenolic ◽  
Antioxidant Power ◽  
Wide Range ◽  
Total Antioxidant

Tea is the most widely consumed and popular non-alcoholic beverage in the world. Reactive oxygen spices may cause wide range of damages to biological systems. Purpose of this study was to determine the total antioxidant capacity and total phenolic of different black tea samples in Iran. The FRAP (Ferric reducing antioxidant power) assay was used for antioxidant activity. The total phenolic content was measured based on the Folin-Ciocalteu method. The results showed that all samples had substantial antioxidant activity and total phenolic content. Iranian tea samples had significantly the lowest 0.98 ± 0.15, 0.75 ± 0.17 µmoll-1 and Kenya tea samples had significantly the highest 2.67 ± 0.61, 2.10 ± 0.65 µmoll-1 amount of total antioxidant capacity and total phenolic, respectively. A linear positive relationship was observed between the antioxidant activity and total phenolic content of the black tea samples. These findings suggest that black tea can be considered as natural source of antioxidant and total phenolic compounds.

Total Phenolic Content, Antioxidant and Antibacterial Properties of Scurrula ferruginea Extracts

2014 ◽  
Vol 70 (5) ◽  
Author(s):  
Mohsen Marvibaigi ◽  
Neda Amini ◽  
Eko Supriyanto ◽  
Shajarahtunnur Jamil ◽  
Fadzilah Adibah Abdul Majid ◽  
...  
Keyword(s):  
Antioxidant Capacity ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Radical Scavenging ◽  
Antibacterial Properties ◽  
Antimicrobial Activities ◽  
Total Phenolic ◽  
Antioxidant Compounds ◽  
Dependent Manner ◽  
Stem Extract

Discovery of new therapeutic agents from nature, especially plants is one of the promising approaches for treatment of various diseases. In traditional medicine Scurrula ferruginea is applied to treat some disorders. To the best of our knowledge, there are no investigations on antioxidant capacity and antimicrobial activities of S.ferruginea in Malaysia. The present study was conducted to determine total phenolic content, Fe2+ chelating activity, antioxidative and antimicrobial potential of flowers, leaves and stems of S.ferruginea extracts. Antioxidant capacity, and total phenolic content of extracts were evaluated using DPPH free radical scavenging and Folin-Ciocalteu assays. Antibacterial properties were evaluated by disc diffusion, minimum inhibitory concentration and minimum bactericidal concentration methods. Results indicated the highest total phenolic content for stem extract (309.069). All S. ferruginea extracts exhibited antioxidant activity in a dose dependent manner. Stem extract showed capacity to scavenge free radicals and it was also found to chelate Fe2+ better than others. All extracts presented moderate inhibition ability against selected bacteria. The most significant values of MIC and MBC were belonged to the stem extract. These findings suggest that acetone extracts of S. ferruginea, particularly stem extract, are potentially sources of antioxidant compounds.

Formulation and characterization of an optimized functional beverage from hibiscus (Hibiscus sabdariffaL.) and green tea (Camellia sinensisL.)

2019 ◽  
Vol 25 (7) ◽  
pp. 547-561 ◽  
Author(s):  
Alejandra M Preciado-Saldaña ◽  
J Abraham Domínguez-Avila ◽  
J Fernando Ayala-Zavala ◽  
Mónica A Villegas-Ochoa ◽  
Sonia G Sáyago-Ayerdi ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Antioxidant Capacity ◽  
Green Tea ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Consumer Preference ◽  
Preference Test ◽  
Total Phenolic ◽  
High Temperature Short Time ◽  
Functional Beverages

Hibiscus sabdariffa and Camellia sinensis are traditionally consumed as beverages and are good sources of health-promoting phenolic compounds. The objective of this work was to use response surface methodology to develop an optimized functional beverage with high total phenolic content, antioxidant capacity, and acceptable for potential consumers. Optimum infusion conditions were 4.9 g of hibiscus calyces or C. sinensis leaves/100 ml of water at 26 ℃ for 291 min. These conditions yielded a total phenolic content of 14.80 ± 1.4 and 33.02 ± 0.34 mg gallic acid equivalents/100 ml for hibiscus and green tea, respectively. The optimized beverages were combined in a 7:3 (hibiscus:green tea, v/v) ratio; a consumer preference test showed that this combination had an acceptable taste according to untrained panelists. A chromatographic analysis showed that this formulation contained flavonoids, phenolic acids, and anthocyanins as its main components. Our data suggested that hibiscus and green tea phenolic compounds were efficiently extracted using near-ambient temperature water for prolonged times, contrary to routine methods (high temperature, short time). Our method also preserved antioxidant capacity, possibly by avoiding chemical changes/degradation due to high temperatures. This process can be used to produce organoleptically acceptable functional beverages that deliver a varied phenolic compound profile to the consumer.

scholarly journals Total Phenolic Content and Antioxidant Capacity of Selected Canned Fruits

2017 ◽  
Vol 9 (13) ◽  
pp. 96
Author(s):  
Hanis Mastura Yahya ◽  
Wendy Ann Roger ◽  
Hasnah Haron
Keyword(s):  
Antioxidant Capacity ◽  
Food Processing ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Total Phenolic ◽  
Dpph Assay ◽  
Frap Assay ◽  
Antioxidant Power ◽  
Ferric Reducing Antioxidant Power

Fruits are high in polyphenols which are compounds associated with the protection against diseases such as diabetes and cancer. However, food processing including canning can leads to the loss of polyphenol in the fruits. Thus, the aim of this study was to evaluate the total phenolic content (TPC) and antioxidant capacity of canned fruits commercially available in the local supermarkets in Malaysia. The TPC was determined by using Folin-Ciocalteu method while the antioxidant capacity was evaluated by using 2,2-diphenyl-1-picrylhydrazyl radical (DPPH assay) and Ferric Reducing Antioxidant Power (FRAP assay). Five types of different canned fruits with the total of 21 samples including longan, lychee, rambutan, pineapple and orange were selected for the analysis. The samples were analyzed in two forms which were, the homogenized (fruits and syrup) and syrup samples. Canned pineapples have the highest TPC for both homogenized (95.16±30.16 mg GAE/100 g) and syrup sample (108.62±33.88 mg GAE/100 g). For antioxidant capacity, canned pineapple also had the highest value for the homogenized sample (41.79±4.20 umol TE/100 g) while lychee was the highest (46.84±12.81 umol TE/100 g) for syrup sample assessed by DPPH assay. For FRAP assay, lychee was highest in antioxidant capacity for both homogenized sample (40.61±10.55 umol TE/100 g) and syrup sample (33.58±7.56 umol TE/100 g). A positive and significant (P < 0.001) correlation was found between TPC and antioxidant capacity (DPPH and FRAP). In conclusion, canned pineapple and lychee were the highest sources of polyphenol as compared to other types of canned fruits. Further investigation is warranted to determine the specific polyphenol present in the canned fruits.

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