scholarly journals Supercritical fluid extraction of murici leaves (Byrsonima crassifolia): Global yield, total phenolic compounds, antioxidant activity, and linear correlations / Extracção de fluido supercrítico de folhas de murici (Byrsonima crassifolia): Rendimento global, compostos fenólicos totais, actividade antioxidante, e correlações lineares

2021 ◽  
Vol 7 (12) ◽  
pp. 110898-110914
Author(s):  
Marcos Martins Almeida ◽  
Flávia Cristina Seabra Pires ◽  
Ana Paula de Souza E Silva ◽  
Sérgio Henrique Brabo De Sousa ◽  
Marielba de los Angeles Rodriguez Salaza ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Supercritical Fluid Extraction ◽  
Supercritical Fluid ◽  
Total Phenolic ◽  
Total Phenolic Compounds ◽  
Fluid Extraction ◽  
Byrsonima Crassifolia ◽  
Linear Correlations

Optimization of Supercritical Fluid Extraction of Phenolic Compounds from Peach Blossom (Amygdalus Persica) by Response Surface Methodology

2018 ◽  
Vol 17 (2) ◽  
pp. 180-187
Author(s):  
Yang Wen-Bo ◽  
Liu Jie-Chao ◽  
Liu Hui ◽  
Zhang Chun-Ling ◽  
Lv Zhen-Zhen ◽  
...  
Keyword(s):  
Response Surface Methodology ◽  
Phenolic Compounds ◽  
Response Surface ◽  
Supercritical Fluid Extraction ◽  
Supercritical Fluid ◽  
Antioxidant Activities ◽  
Total Phenolic ◽  
Fluid Extraction ◽  
Phenolic Contents ◽  
C 30

Supercritical fluid extraction (SFE) was used for the extraction of phenolic compounds from peach blossom (Amygdalus persica). The optimum conditions of SFE were optimized by response surface methodology and confirmed at 64°C, 30 MPa, 143 min, and 35 mL ethanol (100%) as modifier for maximum total phenolic contents (54.10 mg GAE g−1 DW), which was higher than the yield achieved by ultrasonic-assisted extraction (44.04 mg GAE g−1 DW). The antioxidant activities and tyrosinase inhibitory activities of extraction extracted by SFE were 79.55% and 14.42%. Furthermore, chlorogenic acid, quercetin-3-O-galactoside, kaempferol-3-O-galactoside, quercitrin-3-O-rhamnoside, and kaempferol 4′-glucoside were identified in this study.

scholarly journals Co-Solvent Selection for Supercritical Fluid Extraction (SFE) of Phenolic Compounds from Labisia pumila

Molecules ◽  
2020 ◽  
Vol 25 (24) ◽  
pp. 5859 ◽  
Author(s):  
Shazana Azfar Radzali ◽  
Masturah Markom ◽  
Noorashikin Md Saleh
Keyword(s):  
Phenolic Compounds ◽  
Supercritical Fluid Extraction ◽  
Supercritical Fluid ◽  
High Performance ◽  
Radical Scavenging ◽  
Solvent System ◽  
Total Phenolic ◽  
Fluid Extraction ◽  
Antioxidant Power ◽  
Labisia Pumila

A preliminary study was conducted to study the effects of different types and concentrations of co-solvents based on yield, composition and antioxidants capacity of extract prior to optimization studies of supercritical fluid extraction (SFE) of Labisia pumila (locally referred to as ‘kacip fatimah’). The following co-solvents were studied prior to the optimization of supercritical carbon dioxide (SC–CO2) technique: ethanol, water, methanol, as well as aqueous solutions of ethanol–water and methanol–water (50% and 70% v/v). By using the selected co-solvents, identification of phenolic acids (gallic acid, methyl gallate and caffeic acid) was determined by using High-Performance Liquid Chromatography (HPLC). Then, the antioxidant capacity was evaluated by using three different assays: total phenolic content (TPC), ferric reducing/antioxidant power (FRAP) and free radical-scavenging capacity of 2,2-diphenyl-1-picrylhydrazyl (DPPH). SC–CO2 with 70% ethanol–water co-solvent was superior in terms of a higher combination of phenolic compounds extracted and antioxidants capacity. Overall, SC–CO2 with co-solvent 70% ethanol–water technique was efficient in extracting phenolic compounds from L. pumila, and thus the usage of this solvent system should be considered for further optimization studies.

Vegetative propagation, chemical composition and antioxidant activity of yerba mate genotypes

2021 ◽  
pp. 1-10
Author(s):  
Leandro Marcolino Vieira ◽  
Renata de Almeida Maggioni ◽  
Jéssica de Cássia Tomasi ◽  
Erik Nunes Gomes ◽  
Ivar Wendling ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Vegetative Propagation ◽  
Adventitious Rooting ◽  
Ilex Paraguariensis ◽  
Total Phenolic ◽  
Yerba Mate ◽  
Total Phenolic Compounds ◽  
Leaf Retention ◽  
Correlated Components

Abstract Ilex paraguariensis, commonly known as yerba mate, is a tree species native to South America. Its commercial value is due to the manufacturing of teas, with potential also in the pharmacological and cosmetic industries. Vegetative propagation of yerba mate is considered an innovation to the traditional production systems based on sexual propagation. The present study aimed to evaluate the rhizogenic potential and chemical attributes of mini-cuttings from 15 yerba mate genotypes, as well as to verify the correlation between phytochemical and rooting-related variables. Mini-cuttings were collected from a pre-existing mini-clonal hedge and the experimental design was completely randomized, with 15 treatments (genotypes), four replications and 10 mini-cuttings per plot. After 120 days, mini-cuttings were assessed regarding rooting, mortality, callogenesis and leaf retention percentages, percentage of mini-cuttings with both calluses and roots, number of roots and average root length. At the time of collection, subsamples from each plot were used for phytochemical analyses including total phenolic compounds, protein, caffeine and theobromine contents and antioxidant activity. Rooting percentages ranged from 5 to 72.5%, with significant variation among genotypes. Adventitious rooting and phytochemical profile of yerba mate mini-cuttings are genotype-dependent. Leaf retention is a relevant factor in the rooting of yerba mate mini-cuttings and the levels of total phenolic compounds, antioxidants and theobromine present in mini-cuttings are negatively correlated components to Ilex paraguariensis adventitious rooting.

Effect of Drying on Total Phenolic Compounds, Antioxidant Activity, and Kinetics Decay in Pears

2015 ◽  
Vol 15 (2) ◽  
pp. 173-186 ◽  
Author(s):  
Raquel P. F. Guiné ◽  
Maria João Barroca ◽  
Fernando J. Gonçalves ◽  
Mariana Alves ◽  
Solange Oliveira ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Total Phenolic ◽  
Total Phenolic Compounds

scholarly journals Antioxidant activity of phenolic fraction of pea (Pisum sativum)

2013 ◽  
Vol 19 (No. 4) ◽  
pp. 139-142 ◽  
Author(s):  
R. Amarowicz ◽  
M. Karamać ◽  
S. Weidner
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Total Phenolics ◽  
Antioxidant Activities ◽  
Beta Carotene ◽  
Uv Spectra ◽  
Model System ◽  
Total Phenolic ◽  
Total Phenolic Compounds ◽  
Phenolic Fraction

An extract of seeds of pea was prepared using 80% (v/v) acetone. Six fractions (I–VI) were separated from the crude extract on a Sephadex LH-20 column using methanol as the mobile phase. The antioxidant activity of fractions was investigated in a β-carotene-linoleate model system. For individual fractions, UV spectra were recorded and the content of total phenolics was determined. Results of the β-carotene-linoleate model system indicated that antioxidant activities of separated fractions correlated with their content of total phenolic compounds and they decreased in the order of IV = VI > V > III > I > II. The antioxidant activity of fractions IV and VI was very strong as compared with that of butylated hydroxyanisole (BHA). Absorption maxima from UV spectra showed that flavonoids, and not phenolic acids, were the main phenolic compounds in separated fractions.

scholarly journals Optimization of Ultrasound Assisted Extraction of Functional Ingredients from Stevia Rebaudiana Bertoni Leaves

2015 ◽  
Vol 29 (2) ◽  
pp. 231-237 ◽  
Author(s):  
Jana Šic Žlabur ◽  
Sandra Voća ◽  
Nadica Dobričević ◽  
Mladen Brnčić ◽  
Filip Dujmić ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Extraction Procedure ◽  
Total Phenolic ◽  
Steviol Glycosides ◽  
Total Phenolic Compounds ◽  
Ultrasound Assisted Extraction ◽  
Probe Diameter ◽  
Assisted Extraction ◽  
Ultrasound Assisted

Abstract The aim of the present study was to reveal an effective extraction procedure for maximization of the yield of steviol glycosides and total phenolic compounds as well as antioxidant activity in stevia extracts. Ultrasound assisted extraction was compared with conventional solvent extraction. The examined solvents were water (100°C/24 h) and 70% ethanol (at 70°C for 30 min). Qualitative and quantitative analyses of steviol glycosides in the extracts obtained were performed using high performance liquid chromatography. Total phenolic compounds, flavonoids, and radical scavenging capacity by 2, 2-azino-di-3-ethylbenzothialozine- sulphonic acid) assay were also determined. The highest content of steviol glycosides, total phenolic compounds, and flavonoids in stevia extracts were obtained when ultrasound assisted extraction was used. The antioxidant activity of the extracts was correlated with the total amount of phenolic compounds. The results indicated that the examined sonication parameters represented as the probe diameter (7 and 22 mm) and treatment time (2, 4, 6, 8, and 10 min) significantly contributed to the yield of steviol glycosides, total phenolic compounds, and flavonoids. The optimum conditions for the maximum yield of steviol glycosides, total phenolic compounds, and flavonoids were as follows: extraction time 10 min, probe diameter 22 mm, and temperature 81.2°C.

scholarly journals Storage study of cereal bars formulated with banana peel flour

2018 ◽  
Vol 48 (3) ◽  
pp. 386-396 ◽  
Author(s):  
Vania Silva Carvalho ◽  
Ana Carolina Conti-Silva
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Storage Period ◽  
Banana Peel ◽  
Total Phenolic ◽  
Total Antioxidant Activity ◽  
Total Phenolic Compounds ◽  
Content Type ◽  
Total Antioxidant ◽  
Cereal Bars

Purpose This paper aims to examine the bioactive compounds and texture properties of cereal bars formulated with banana peel flour during storage. Design/methodology/approach Seven cereal bars were produced and stored during 11 months, under vacuum and protected from the light. The total phenolic compounds, the activity antioxidant by ABTS [2,2′-Azino-bis(3-ethylbenzothiazoline-6-sulfonic acid)] method, the DPPH (2,2-diphenyl-1-picryl-hydrazyl-hydrate) method expressed as EC50 (concentration required to reduce the original amount of free radicals by 50 per cent) and texture properties were evaluated over the storage period. Findings In general, total phenolic compounds decreased during storage (from 4.19 to 1.11 mg GAE. g-1f.w.). Although the total antioxidant activity (ABTS method) increased during the fifth month, it reduced during storage (from 3.41 to 0.30 µmol TE.g-1f.w.); and the EC50 was not modified in many formulations, though it decreased in other formulations during storage period (from 3913 to 19221 g fruit.g-1 DPPH). The force of rupture began to increase in the fourth month (reaching 62.4 N), and hardness began to increase in the ninth month (reaching 444 N). The formulation and time factors influenced the total phenolic compounds, total antioxidant activity (ABTS method), force of rupture and hardness, while EC50 was only influenced by the formulation (p-value = 0.001). A principal component analysis showed that time had little effect on the most important characteristics considered in description of the cereal bars. Originality/value Cereal bars can be consumed up to the third month of storage, considering the texture of the products. Moreover, the presence of bioactive compounds in cereal bars depends on the addition of banana peel flour, which it contributes to the insertion of total phenolic compounds and total antioxidant activity in cereal bars, aggregating functional properties in these products.

Chemical profile and antioxidant activity of sage herbal dust extracts obtained by supercritical fluid extraction

2018 ◽  
Vol 120 ◽  
pp. 305-312 ◽  
Author(s):  
Branimir Pavlić ◽  
Oskar Bera ◽  
Nemanja Teslić ◽  
Senka Vidović ◽  
Giuseppina Parpinello ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Supercritical Fluid Extraction ◽  
Supercritical Fluid ◽  
Chemical Profile ◽  
Fluid Extraction
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