scholarly journals Comparison of Phenolic Compounds and Antioxidant Activities of Raw and Cooked Turkish Artichoke Cultivars

2021 ◽  
Vol 5 ◽  
Author(s):  
Seda Kayahan ◽  
Didem Saloglu
Keyword(s):  
Phenolic Compounds ◽  
Chlorogenic Acid ◽  
Acid Content ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Antioxidant Activities ◽  
Total Phenolic ◽  
Total Phenolic Compounds ◽  
Microwave Cooking ◽  
Gallic Acid Equivalent

The objective of this work was to determine the total phenolic compounds and antioxidants in raw and cooked Sakiz and Bayrampasa variety artichokes in parts such as inner bracts, stems, receptacles, and outer bracts. The artichokes were cooked by boiling, microwaving, and baking methods, and total phenolic compounds and antioxidants of cooked artichokes were evaluated. While TPC (total phenolic content), DPPH (2,2-diphenyl-1-picryl-hydrazine), and CUPRAC values for the leaves of raw Bayrampasa artichoke were found to be 686 mg gallic acid equivalent (GAE)/100 g, 478 mg TE/100 g, and 4,875 mg TE/100 g, respectively, TPC, DPPH, and CUPRAC values for stems of Sakiz artichoke were determined to be 1,579 mg GAE/100 g, 1,259 mg TE/100 g, and 3,575 mg TE/100 g. A significant increase in the content of TPC, DPPH, and CUPRAC values was observed for all cooking applications of both artichokes. DPPH and CUPRAC values increased by 11 and 43 times and 17 and 6.7 times after baking of Sakiz and microwave cooking of Bayrampasa, respectively. Chlorogenic acid, cynarine, and cynaroside content of both artichokes had an increment after all cooking applications. Chlorogenic acid content was improved 29 and 58 times after baking of Sakiz and microwave cooking of Bayrampasa, respectively.

scholarly journals Changes in Elderberry (Sambucus nigra L.) Juice Concentrate Polyphenols during Storage

2021 ◽  
Vol 11 (15) ◽  
pp. 6941
Author(s):  
Cláudia M. B. Neves ◽  
António Pinto ◽  
Fernando Gonçalves ◽  
Dulcineia F. Wessel
Keyword(s):  
Phenolic Compounds ◽  
Chlorogenic Acid ◽  
Total Phenolic Content ◽  
Room Temperature ◽  
Phenolic Content ◽  
Total Phenolic ◽  
Sambucus Nigra ◽  
Juice Concentrate ◽  
Rutin And Quercetin ◽  
Polymeric Color

Elderberry (Sambucus nigra L.) juice concentrate is highly rich in polyphenols, particularly anthocyanins and flavonols, which have been associated with a wide range of health-promoting properties. Phenolic compounds, in particular anthocyanins, are unstable and may change during storage, which might influence the product color quality and its potential health effects. The aim of this study was to evaluate the changes in the polyphenols profile of elderberry juice concentrate produced at an industrial scale during seven months of storage at 5 °C and at room temperature. The total phenolic content, the total monomeric anthocyanins, the percent polymeric color, and the ABTS•+ scavenging activity were monitored over time. In addition, the profile and content of the main individual phenolic compounds were also assessed by HPLC-DAD. The results show that cyanidin-3-O-sambubioside, cyanidin-3-O-glucoside, cyanidin-3-O-sambubioside-5-O-glucoside, cyanidin-3,5-O-diglucoside, chlorogenic acid, rutin, and quercetin-3-O-glucoside were the main phenolic compounds identified. Storage at room temperature resulted in a strong reduction in total monomeric anthocyanin content accompanied by an increase in percent polymeric color values. Cyanidin-3-O-sambubioside and cyanidin-3-O-glucoside degraded faster than cyanidin-3,5-O-diglucoside and cyanidin-3-O-sambubioside-5-O-glucoside. Concentration of chlorogenic acid also decreased over storage, whereas rutin and quercetin-3-O-glucoside were quite stable. Storage at 5 °C caused a lower impact on the contents of anthocyanins and chlorogenic acid and the percent polymeric color was not affected. The total phenolic content and the in vitro antioxidant activity remained quite similar over the time, for both temperatures, suggesting that elderberry concentrates still preserve their health benefits of antioxidant capacity after seven months of storage.

scholarly journals Variety and Year Impact on Phenolic Content of Arkansas-Grown Sweetpotato Leaves

2020 ◽  
Vol 4 (Supplement_2) ◽  
pp. 371-371
Author(s):  
Josue Bolanos ◽  
Sun-Ok Lee ◽  
Luke Howard ◽  
Cindi Brownmiller ◽  
Shahidul Islam ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Antioxidant Capacity ◽  
Chlorogenic Acid ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Statistical Significance ◽  
Radical Scavenging ◽  
Dry Weight ◽  
Antioxidant Potential ◽  
Total Phenolic

Abstract Objectives Sweetpotato leaf (SPL) is a natural source of phenolic compounds with potential utility as an antioxidant. The study aimed to measure the impacts of the years on SPL total phenolic content and antioxidant capacity and to identify and quantify the individual phenolic compounds. Methods Sweetpotato leaves in 2018 (27 varieties) and 2019 (24 varieties) were grinded and lyophilized. Phenolic compounds were extracted with 70% ethanol from SPLs. Total phenolic content was determined by Folin-Ciocalteu method and antioxidant potential was determined by DPPH (2,2-diphenyl-1-picrylhydrazyl) radical scavenging assay. Five SPL samples with statistically highest antioxidant capacity were identified and quantified by HPLC. All statistical analyses were carried out by SAS software using ANOVA. Statistical significance was accepted at P < 0.05. Results The average of total phenolic contents in 2018 SPL samples was 43 ± 13 mg gallic acid equivalent (GAE)/g dry weight (DW) SPL whereas in 2019, it was 53 ± 9 mg GAE/g dry weight SPL. Antioxidant capacity in 2018 was 110 ± 75 µmol Trolox equivalent (TE)/g dry weight SPL whereas in 2019, it was 132 ± 32 µmol TE/g dry weight SPL. SPL1 had the highest antioxidant potential, followed by SPL9, SPL3, SPL28, and SPL11 (P < 0.05). The concentrations of major identified phenolics from the five SPL samples (#1, 9, 3, 28, and 11) in dry weight of SPL were: chlorogenic acid at 3.05 ± 0.35 mg/g, 5-monocaffeoylquinic acid (CQA) at 0.71 ± 0.06 mg chlorogenic acid equivalent (ChAE)/g, 4-CQA at 0.99 ± 0.07 mg ChAE/g, 3,4-diCQA at 1.22 ± 0.18 mg ChAE/g, 3,4,5-triCQA at 1.2 ± 0.18 mg ChAE/g, and 3,5-diCQA at 15.5 ± 4.05 mg ChAE/g. 3,5-diCQA, the predominant phenolic, was present in the highest amounts in SPL1. Conclusions The results showed that sweetpotato leaves collected in 2019 contained higher total phenolics and antioxidant capacity than the ones collected in 2018. Phenolic compounds have strong antioxidant activity in Arkansas-grown sweetpotato leaves. This study warrants further investigation of sweetpotato leaves to be utilized as an antioxidant. Funding Sources The work was supported by USDA-NIFA.

scholarly journals STUDI OPTIMASI EKSTRAKSI KANDUNGAN SENYAWA FENOLIK TOTAL DAN UJI AKTIVITAS ANTIOKSIDAN DARI DAUN MANGGIS (Garcinia mangostana Linn.)

2019 ◽  
Vol 10 (1) ◽  
pp. 36
Author(s):  
Emil Salim ◽  
Yogi Afritunando ◽  
Nindi Antika Febriana ◽  
Mai Efdi
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Total Phenolic ◽  
Total Phenolic Compounds ◽  
Garcinia Mangostana ◽  
Activity Test ◽  
Ic50 Value ◽  
Dpph Method

This study aims to determine antioxidant activity and total phenolic content of mangosteen leaves in several different solvents. The antioxidant activity test of the extract was determined by the DPPH method and the total phenolic content was determined by the Folin-Ciocalteu method. The phytochemical test of mangosteen leaves showed the presence of phenolic compounds, saponins, triterpenoids and alkaloids. The extraction results increase with increasing water content in methanol, ethanol and acetone. The highest amount of extract was obtained using 50% acetone solvent (34.98 ± 0.17%). Extraction using 100% ethanol showed the highest total phenolic content (614.25 ± 5.58 mg GAE / g extract) and the lowest IC50 value (5.81 mg / L). The results of this study indicate that the use of 50% acetone solvent can optimize the amount of extract and 100% ethanol can optimize the content of total phenolic compounds and antioxidant activity of mangosteen leaves.

scholarly journals Formulation and Physicochemical Evaluation of a 3% Cream Using Crude 70% Ethanolic Extract of Morus alba L. Leaves for Skin Hyperpigmentation

2021 ◽  
Vol In Press (In Press) ◽  
Author(s):  
Shahab Edalatian Zakeri ◽  
Abbas Hadjiakhoondi ◽  
Saman Ahmad Nasrollahi ◽  
Mahdi Vazirian ◽  
Atefeh Naeimifar
Keyword(s):  
Phenolic Compounds ◽  
Side Effects ◽  
Total Phenolic Content ◽  
Microbial Growth ◽  
Phenolic Content ◽  
Ethanolic Extract ◽  
Total Phenolic ◽  
Total Phenolic Compounds ◽  
Perennial Plant

Background: Treatment of hyperpigmentation disorders is a challenge because of the side effects of current topical treatments. Thus, research for potent alternatives, especially of herbal origin, with comparable potency and less side effects is ongoing. Mours alba L. is a perennial plant with multiple established pharmacological effects, including antimelanogenesis effect. This effect has been demonstrated from different parts of the plant, including twigs, root barks, and leaves by measuring tyrosinase inhibition, melanin content, and melanin index, and it has been attributed to phenolic compounds such as oxyresveratrol and moracin M, to name a few. However, no study has considered formulating the total phenolic compounds from the leaves of this plant so far. Objectives: The aim of this study was to extract phenolic compounds of leaves with repeated maceration using 70% ethanol, formulate the crude extract, inspect its physicochemical stability under accelerated conditions, and assay for microbial growth and active phenolic compounds. Methods: Total phenolic compounds were extracted using 70% ethanol with repeated maceration, and then they were concentrated. The extract was then assayed for total phenolic content using Folin-Ciocalteu’s reagent. A 3% cream of this extract was manufactured, and its physicochemical parameters, microbial growth, preservative effectiveness, and total phenolic content were examined. Results: The prepared 3% cream was completely stable and homogeneous during the accelerated conditions and passed the physicochemical, total phenolic content, and microbial tests. Conclusions: The manufactured cream is a promising formulation for in vivo use as a skin lightening agent.

scholarly journals Antioxidant Properties of Western Georgia Native Khechechuri Pear

Sci ◽  
2020 ◽  
Vol 2 (2) ◽  
pp. 31
Author(s):  
Tamara Gabour Sad ◽  
Indira Djafaridze ◽  
Aleko Kalandia ◽  
Maia Vanidze ◽  
Katarina Smilkov ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Phenolic Acids ◽  
Total Phenolic Content ◽  
Fruit Juice ◽  
Phenolic Content ◽  
Antioxidant Activities ◽  
Antioxidant Properties ◽  
Total Phenolic ◽  
Bioactive Components

An endemic pear species spreads in one region of western Georgia, Adjara, called Khechechuri. Pears are dietary source of bioactive components such as polyphenols and triterpenic acid. In addition to its gastronomic value, the aim of the article was to examine and compare phenolic compounds, flavonoids, catechins, phenolic acids, and antioxidant activities in five species of Khechechuri collected from various regions in Adjara region: Adjaristskali, Merisi, Dandalo, Shuakhevi, and Khulo. Five fruit parts, the skin, edible pulp, the whole pear (skin + pulp), juice and the pomace were analyzed and the results were compared. Our study revealed that the amount of total phenolic content found in the skin of West Georgian pear types was as much as 4650 mg/kg. Also, the pear pomace showed significant amount of total phenolic content in all species of Khechechuri. In addition, in all species of Khechechuri pears, flavonoids were found, except in the fruit juice.

scholarly journals Green Extraction of Six Phenolic Compounds from Rattan (Calamoideae faberii) with Deep Eutectic Solvent by Homogenate-Assisted Vacuum-Cavitation Method

Molecules ◽  
2018 ◽  
Vol 24 (1) ◽  
pp. 113 ◽  
Author(s):  
Qin Cao ◽  
Junhan Li ◽  
Yu Xia ◽  
Wei Li ◽  
Sha Luo ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Chlorogenic Acid ◽  
Gallic Acid ◽  
Total Phenolic Content ◽  
Protocatechuic Acid ◽  
Phenolic Content ◽  
Deep Eutectic Solvent ◽  
Epigallocatechin Gallate ◽  
Total Phenolic ◽  
Protocatechuic Aldehyde

A homogenate-assisted vacuum-cavitation extraction (HVE) method with a “green” solvent (a deep eutectic solvent, DES) was developed to extract phenolic compounds from rattan (Calamoideae faberii). In this study, the optimum molar ratio of choline chloride (ChCl) and ethylene glycol (EG) was 1:3, the optimum volume ratio of ChCl-EG:H2O was 6:4, the solid-liquid ratio of HVE was 1:15, and the extraction time of homogenate and vacuum-cavitation were 2.0 min and 25 min, respectively. Under the optimum parameters of HVE, the extraction yield of total phenolic content with ChCl-EG solution was 6.82 mg/g. The higher total phenolic content was detected in fruit tissues (seeds 81.24 ± 1.55 mg/g, episperm 43.21 ± 0.87 mg/g, and arillus 38.47 ± 0.74 mg/g), followed by in leaves (sheath 19.5 ± 0.38 mg/g and blade 17.81 ± 0.33 mg/g). In addition, the content of specific phenolic compounds in aqueous and DES extracts was determined. Chlorogenic acid was the most abundant phenol in most organs of the rattan plant. Gallic acid was mainly distributed in the arillus; protocatechuic acid was mainly distributed in the arillus, sheath, and blade; protocatechuic aldehyde was mainly distributed in the blade, seed, and sheath; (+)-catechins were mainly distributed in the episperm, seed, and sheath; and epigallocatechin gallate was mainly distributed in the blade. The recovery rates of gallic acid, protocatechuic acid, protocatechuic aldehyde, (+)-catechins, chlorogenic acid, and epigallocatechin gallate were 93.77%, 94.09%, 97.32%, 97.83%, 94.41%, and 92.47%, respectively, by AB-8 resin.

Antioxidant Properties of Western Georgia Native Khechechuri Pear

Sci ◽  
2019 ◽  
Vol 1 (2) ◽  
pp. 44
Author(s):  
Tamara Gabour Sad ◽  
Indira Djafaridze ◽  
Aleko Kalandia ◽  
Maia Vanidze ◽  
Katarina Smilkov ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Phenolic Acids ◽  
Total Phenolic Content ◽  
Fruit Juice ◽  
Phenolic Content ◽  
Antioxidant Activities ◽  
Antioxidant Properties ◽  
Total Phenolic ◽  
Bioactive Components

An endemic pear species spreads in one region of western Georgia, Adjara, called Khechechuri. Pears are dietary source of bioactive components such as polyphenols and triterpenic acid. In addition to its gastronomic value, the aim of the article was to examine and compare phenolic compounds, flavonoids, catechins, phenolic acids, and antioxidant activities in five species of Khechechuri collected from various regions in Adjara region: Adjaristskali, Merisi, Dandalo, Shuakhevi, and Khulo. Five fruit parts, the skin, edible pulp, the whole pear (skin + pulp), juice and the pomace were analyzed and the results were compared. Our study revealed that the amount of total phenolic content found in the skin of West Georgian pear types was as much as 4650 mg/kg. Also, the pear pomace showed significant amount of total phenolic content in all species of Khechechuri. In addition, in all species of Khechechuri pears, flavonoids were found, except in the fruit juice.

scholarly journals Antioxidant Properties of the Native Khechechuri Pear from Western Georgia

Sci ◽  
2021 ◽  
Vol 3 (1) ◽  
pp. 10
Author(s):  
Tamara Gabour Sad ◽  
Indira Djafaridze ◽  
Aleko Kalandia ◽  
Maia Vanidze ◽  
Katarina Smilkov ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Phenolic Acids ◽  
Endemic Species ◽  
Total Phenolic Content ◽  
Fruit Juice ◽  
Phenolic Content ◽  
Antioxidant Activities ◽  
Antioxidant Properties ◽  
Total Phenolic ◽  
Bioactive Components

Khechechuri is an endemic species of a pear spread over one region of Western Georgia, called Adjara. Pears are a dietary source of bioactive components such as polyphenols and triterpenic acid. In addition to highlighting its gastronomic value, the aim of the article was to examine and compare phenolic compounds, flavonoids, catechins, phenolic acids, and antioxidant activities in Khechechuri collected from various villages in the Adjara region, namely Adjaristskali, Merisi, Dandalo, Shuakhevi, and Khulo. Five parts of the fruit, the skin, edible pulp, whole pear (skin + pulp), juice, and pomace, were analyzed and the results compared. Our study indicated that the highest total phenolic content was found in the skin of West Georgian pear types (4650 mg/kg.) Moreover, the pomace showed significant amounts of total phenolic content in each of the Khechechuri samples analyzed. Flavonoids were found in each part of the Khechechuri pears, with the notable exception of the fruit juice. A positive correlation between the total phenolic content and the geographical altitude of where the fruits were collected was observed.

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