Influence of thermal treatments on the antioxidant activity of hemp cake polar extracts

Recent trends in the food industry combined with novel methods in agriculture could transform rowan into a valuable raw material with potential technological applications. Thus, the aim of this research was to investigate the content of bioactive compounds in its fruits and to assess the color and antioxidant stability of the extracts prepared from such fruits during various thermal treatments and at different pH and ionic strength values. Various spectrophotometric methods, HPLC, and capillary electrophoresis were used to quantify the concentrations of bioactive compounds—polyphenols, carotenoids, organic acids, and to assess antioxidant activity and color. The results show that rowan berries contain circa 1.34–1.47 g/100 g of polyphenols among which include catechin, epicatechin, ferulic acid methyl ester, procyanidin B1, etc.; ca 21.65 mg/100 g of carotenoids including zeaxanthin, β-cryptoxanthin, all-trans-β-carotene, and various organic acids such as malic, citric, and succinic, which result in a high antioxidant activity of 5.8 mmol TE/100 g. Results also showed that antioxidant activity exhibited high stability when the extract was subjected to various thermal treatments, pHs, and ionic strengths, while color was mainly impacted negatively when a temperature of 100 °C was employed. This data confirms the technological potential of this traditional, yet often overlooked species.

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Effect of Thermal Processing on Color, Phenolic Compounds, and Antioxidant Activity of Faba Bean (Vicia faba L.) Leaves and Seeds

Antioxidants ◽

10.3390/antiox10081207 ◽

2021 ◽

Vol 10 (8) ◽

pp. 1207

Author(s):

Shu-Cheng Duan ◽

Soon-Jae Kwon ◽

Seok-Hyun Eom

Keyword(s):

Antioxidant Activity ◽

Faba Bean ◽

Nutritional Value ◽

Cooking Methods ◽

Thermal Treatments ◽

Nutritional Values ◽

Beneficial Effects ◽

Young Leaves ◽

Dry Heating ◽

Positive Correlations

The leaves and seeds of the faba bean are good sources of L-3,4-dihydroxyphenylalanin (L-dopa), and are usually eaten with thermal cooking methods. However, little information is available on the effect of thermal treatments on their nutritional value. We compared the changes in color, contents of L-dopa, vitamin C (Vc), total phenolics (TP), total flavonoids (TF) and antioxidant activity after dry heating or steaming faba bean leaves and seeds. The young leaves provided higher values of all the estimate factors, regardless of the thermal treatment. Steaming significantly degraded nutritional values of the leaves, but less changed in seeds, whereas dry heat maintained these attributes. The contents of L-dopa, Vc, TP and TF were shown to have strongly positive correlations with antioxidant activity in the leaves, whereas only L-dopa content was positively correlated with antioxidant activity of the seeds. Faba leaves contained relatively high L-dopa which possessed strong antioxidant activity compared to the Vc. As L-dopa is an important contributor to the antioxidant activity of faba leaves and seeds, consuming L-dopa from leaves may provide beneficial effects not only regarding Parkinson’s Disease.

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ANTIOXIDANT ACTIVITY OF RHIZOME EXTRACTS OF COLEUS FORSKOHLII BRIQ

Asian Journal of Pharmaceutical and Clinical Research ◽

10.22159/ajpcr.2018.v11i11.27125 ◽

2018 ◽

Vol 11 (11) ◽

pp. 275 ◽

Cited By ~ 2

Author(s):

Shanmugam S ◽

Usha Rani V ◽

Pradeep B V

Keyword(s):

Antioxidant Activity ◽

Tamil Nadu ◽

Radical Scavenging Activity ◽

Radical Scavenging ◽

Ethanol Extract ◽

Total Phenol ◽

Coleus Forskohlii ◽

Phytochemical Constituents ◽

Polar Extracts ◽

Dpph Radical Scavenging

Objective: The present study was on the analysis of the phytochemical constituents of Coleus forskohlii which was collected from five different areas in Tamil Nadu, where it is grown for commercial purposes.Methods: C. forskohlii tubers were collected from five areas (Thiruvannamalai, Kanchipuram, Kallakuruchi, Salem, and Vandalur) of Tamil Nadu. Dried tubers were extracted with different solvents such as aqueous, ethanol, and acetone (polar) and petroleum and chloroform (non-polar). Extracts were evaluated for total phenol and flavonoid content and antioxidant activity evaluation by 1,1-diphenyl-2-picrylhydrazyl (DPPH) reduction.Results: The highest DPPH radical scavenging activity (87.6%) was observed in ethanol extract of rhizome collected from Thiruvannamalai area. Total phenol and flavonoid contents were found to be, respectively, 38.82±0.22 mg gallic acid equivalents/g and 21.34±0.32 quercetin equivalent/g.Conclusion: The study clearly indicated the antioxidative potential of different extracts of C. forskohlii and this property may be useful in the preparation of drug formulations, health tonics, and cosmetics.

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Metabolite Profiling of Commiphora wightii (Guggul) with Respect to Seasons

Natural Product Communications ◽

10.1177/1934578x1801301028 ◽

2018 ◽

Vol 13 (10) ◽

pp. 1934578X1801301

Author(s):

Tusha Tripathi ◽

Anil Bhatia ◽

Suruchi Singh ◽

Kunwar Sarvendra ◽

Abdul Rahman Khan ◽

...

Keyword(s):

Antioxidant Activity ◽

Dietary Supplement ◽

Metabolic Profiling ◽

Radical Scavenging Activity ◽

Radical Scavenging ◽

Quinic Acid ◽

Commiphora Wightii ◽

Tert Butyl ◽

Polar Metabolites ◽

Polar Extracts

Aim of the study was to undertake comprehensive metabolic profiling of plant parts of Commiphora wightii during two contrasting seasons i.e. summer and winter; compared seasonal metabolic variations; and assess antioxidant activity of fractions for commercial applications. Leaves, young stems and gum-resin extracts from summer and winter seasons were analyzed using GC-MS, HPLC and NMR spectroscopy. The antioxidant activity on each set was determined by DPPH free radical scavenging assay. Complete metabolic profiling from two contrasting seasons identified one hundred and four major known and unknown metabolites. Also, two alkylated phenols, 2,4-di- tert-butyl phenol and 3-(3,5-di- tert-butyl-4-hydroxyphenyl) propanoic acid not reported earlier from this taxon were isolated from the vegetative part. Comparative analysis of seasonal metabolic profiles of leaves, young stems and gum-resin revealed significant variations in concentrations of several metabolites. Multivariate principal component analysis (PCA) showed significant qualitative and quantitative variations in the polar (glycine, quinic acid and myo-inositol) and non-polar metabolites (alkylated phenols, guggulsterones and α-tocopherol) between the two seasons. Variation amongst metabolites such as myo-inositol, quinic acid α- tocopherol and alkylated phenols that are important for nutraceutical industry in the two contrasting seasons is a useful finding. These metabolites are of medicinal and nutraceutical importance and are commonly used in nutraceuticals and dietary supplement industry. DPPH radical scavenging activity (IC50 values) of polar and non-polar extracts varied significantly between summer and winter seasons. The antioxidant activity can be attributed to major polar metabolite, quinic acid biosynthesized in excess during winter, and to non-polar metabolites like alkylated phenols and α-tocopherol present during the summer season. The study shall be useful for medicinal, nutraceutical and dietary supplement industry for selection of polar or non-polar extracts from a particular season for obtaining targeted products with optimized functionality.

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Effect of Equivalent Thermal Treatments on the Color and the Antioxidant Activity of Tomato Puree

Journal of Food Science ◽

10.1111/j.1365-2621.2002.tb09603.x ◽

2002 ◽

Vol 67 (9) ◽

pp. 3442-3446 ◽

Cited By ~ 30

Author(s):

M. Anese ◽

P. Falcone ◽

V. Fogliano ◽

M.C. Nicoli ◽

R. Massini

Keyword(s):

Antioxidant Activity ◽

Thermal Treatments ◽

Tomato Puree

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Phytochemicals and antioxidant activity degradation kinetics during thermal treatments of sour cherry extract

LWT ◽

10.1016/j.lwt.2017.04.026 ◽

2017 ◽

Vol 82 ◽

pp. 139-146 ◽

Cited By ~ 15

Author(s):

Ana-Maria Oancea ◽

Mihaela Turturică ◽

Gabriela Bahrim ◽

Gabriela Râpeanu ◽

Nicoleta Stănciuc

Keyword(s):

Antioxidant Activity ◽

Degradation Kinetics ◽

Sour Cherry ◽

Thermal Treatments

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Free radical scavenging properties and antioxidant activity of polar extracts from fruits of Eryngium planum and Eryngium amethystinum

Pharmacological Reports ◽

10.1016/s1734-1140(13)71411-7 ◽

2013 ◽

Vol 65 ◽

pp. 101-102

Author(s):

Krzysztof K. Wojtanowski ◽

Krystyna Skalicka-Woźniak ◽

Jarosław Widelski ◽

Kazimierz Głowniak

Keyword(s):

Antioxidant Activity ◽

Free Radical ◽

Radical Scavenging ◽

Free Radical Scavenging ◽

Polar Extracts ◽

Radical Scavenging Properties

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Free-radical Scavenging and Quantitative Estimation of Flavonoids from the Polar Extracts of Corchorus depressus Leaves

Journal of Pharmaceutical Research International ◽

10.9734/jpri/2021/v33i51a33486 ◽

2021 ◽

pp. 210-219

Author(s):

Khuntia Tapas Kumar ◽

Nanda Upendra Nath ◽

Senapati Aswini Kumar

Keyword(s):

Nitric Oxide ◽

Antioxidant Activity ◽

Phenolic Content ◽

Methanolic Extract ◽

Biological Activities ◽

Radical Scavenging ◽

Aluminium Chloride ◽

Total Phenolic ◽

Nitric Oxide Radical ◽

Polar Extracts

Background: The investigation of total flavonoids and antioxidant activity of polar extracts of Corchorus depressus is the major aim of this study. As observed from ancient literatures and folkloric claims the plant Corchorus depressus worshipped by the married women of Odisha, India, in the rituals called as “Jama Jutia”, possesses different biological activities including antioxidant property. Methods: The diphenyl picryl hydrazine, hydroxyl radical and nitric oxide radical scavenging methods were performed for measurement of the antioxidant activity at different extracts. The flavonoid and phenolic content of the extracts were determined by using aluminium chloride and Folin-Ciocalteau’s reagent (FCR) methods respectively. Results: The results for estimation of total phenolic content (mg/ 100 g) expressed as gallic acid equivalent (GAE) and total flavonoid (mg/ 100 g) in weight of quercetin equivalent (QE) was highest in methanolic extract 78.46 and 21.2 respectively, followed by 18.18 mg/100 g in GAE and 1.80 mg/100 g in QE for aqueous extract. Conclusion: The methanolic extract of C. depressus at 100µg/ml showed highest DPPH, hydroxyl and nitric oxide radical scavenging activity and this activity may be attributed to the presence of saponins and flavonoids as detected in the extract.

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