scholarly journals Condensed Tannins as Antioxidants in Ruminants—Effectiveness and Action Mechanisms to Improve Animal Antioxidant Status and Oxidative Stability of Products

Animals ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 3243
Author(s):  
David Soldado ◽  
Rui J. B. Bessa ◽  
Eliana Jerónimo
Keyword(s):  
Antioxidant Activity ◽  
Oxidative Stability ◽  
Condensed Tannins ◽  
Antioxidant Status ◽  
Natural Antioxidants ◽  
Action Mechanisms ◽  
Antioxidant Agents ◽  
Wide Range ◽  
Ruminant Diets ◽  
Antioxidant Effects

Condensed tannins (CTs) are widely distributed in plants, and due to their recognized antioxidant activity are considered as possible natural antioxidants for application in ruminant diets. A wide range of CT-rich sources has been tested in ruminant diets, and their effects on animal antioxidant status and oxidative stability of their products are reviewed in the present work. Possible mechanisms underlying the CT antioxidant effects in ruminants are also discussed, and the CT chemical structure is briefly presented. Utilization of CT-rich sources in ruminant feeding can improve the animals’ antioxidant status and oxidative stability of their products. However, the results are still inconsistent. Although poorly understood, the evidence suggests that CTs can induce an antioxidant effect in living animals and in their products through direct and indirect mechanisms, which can occur by an integrated and synergic way involving: i) absorption of CTs with low molecular weight or metabolites, despite CTs’ poor bioavailability; ii) antioxidant action on the gastrointestinal tract; and iii) interaction with other antioxidant agents. Condensed tannins are alternative dietary antioxidants for ruminants, but further studies should be carried out to elucidate the mechanism underlying the antioxidant activity of each CT source to design effective antioxidant strategies based on the use of CTs in ruminant diets.

Neuroprotection with Natural Antioxidants and Nutraceuticals in the Context of Brain Cell Degeneration: The Epigenetic Connection

2020 ◽  
Vol 19 (32) ◽  
pp. 2999-3011 ◽  
Author(s):  
Iván Carrera ◽  
Olaia Martínez ◽  
Ramón Cacabelos
Keyword(s):  
Antioxidant Activity ◽  
Biological Effects ◽  
Natural Antioxidants ◽  
Brain Cell ◽  
Point Of View ◽  
Cell Degeneration ◽  
Epigenetic Modifiers ◽  
Antioxidant Agents ◽  
Wide Range ◽  
The Brain

: Bioactive antioxidant agents present in selected plants are known to provide the first line of biological defense against oxidative stress. In particular, soluble vitamin C, E, carotenoids and phenolic compounds have demonstrated crucial biological effects in cells against oxidative damage, preventing prevalent chronic diseases, such as diabetes, cancer and cardiovascular disease. The reported wide range of effects that included anti-aging, anti-atherosclerosis, anti-inflammatory and anticancer activity were studied against degenerative pathologies of the brain. Vitamins and different phytochemicals are important epigenetic modifiers that prevent neurodegeneration. In order to explore the potential antioxidant sources in functional foods and nutraceuticals against neurodegeneration, the present paper aims to show a comprehensive assessment of antioxidant activity at chemical and cellular levels. The effects of the different bioactive compounds available and their antioxidant activity through an epigenetic point of view are also discussed.

scholarly journals Purification, Characterization, and Antioxidant Activity of Daucosterol and Stigmasterol from Prangos ferulacea

2020 ◽  
Vol 10 (2) ◽  
pp. 2174-2180
Keyword(s):  
Antioxidant Activity ◽  
Structure Elucidation ◽  
Antiradical Activity ◽  
Bioactive Metabolites ◽  
Spectroscopic Techniques ◽  
Chromatographic Techniques ◽  
Phytochemical Investigation ◽  
Antioxidant Agents ◽  
Wide Range ◽  
Ft Ir

The genus Prangos is traditionally used for medicinal and food purposes. This genus contains a wide range of bioactive metabolites. In this work, phytochemical investigation and antioxidant activity evaluation of Prangos ferulacea were carried out. Chromatographic techniques were employed for the purification of extracts components. Spectroscopic techniques such as NMR, FT-IR, together with elemental analysis, were used for the structure elucidation of isolated compounds. Stigmasterol, daucosterol, and salicylic acid were purified and identified. Isolated compounds showed moderate to high antiradical activity in DPPH antioxidant assay. Results indicated the potential of P. ferulacea as a source of steroid and their glycosides and also its possible applications as antioxidant agents.

scholarly journals Evaluation of phytochemical and superoxide dismutase activities of Enhalus acoroides (L.f.) Royle from coastal waters of North Sulawesi, Indonesia

2020 ◽  
Vol 13 (4) ◽  
pp. 676-680
Author(s):  
Febry S. I. Menajang ◽  
Mohammad Mahmudi ◽  
Uun Yanuhar ◽  
Endang Yuli Herawati
Keyword(s):  
Antioxidant Activity ◽  
Superoxide Dismutase ◽  
Natural Antioxidants ◽  
Antioxidant Compounds ◽  
Beneficial Effects ◽  
Enhalus Acoroides ◽  
North Sulawesi ◽  
Antioxidant Agents ◽  
Phytochemical Constituents ◽  
Concentration Series

Background and Aim: Seagrasses are an excellent and potential bioresource to discover new natural bioactive compounds such as antioxidants that have beneficial effects on health. Natural antioxidants have many functions in biological systems, primarily for defense against oxidation which produces free radicals in food, chemicals, and living systems. This study aimed to discover new natural antioxidant agents, Enhalus acoroides (L.f.) Royle was evaluated for phytochemical constituents and the antioxidant activity against superoxide dismutase (SOD) was assessed. Materials and Methods: Sample specimens of E. acoroides (L.f.) Royle collected from two different areas, Manembo- Nembo, Bitung (SG-A) and Bahoi, Likupang Barat (SG-B) waters, were extracted with methanol and solutions were prepared in a concentration series. Results: Extracts of the seagrass E. acoroides (L.f.) Royle cultivated in different areas have different phytochemical constituents and SOD activities. The secondary metabolites of phenols, flavonoids, and steroids contained in the ethyl acetic extracts of E. acoroides were linearly correlated with their antioxidant activity, which exhibited an IC50 of 7 ppm. Conclusion: E. acoroides (L.f.) Royle samples cultivated in the two areas contained different phytochemical constituent profiles, indicating an effect of environmental factors, and both can be used as potential natural sources of antioxidant compounds.

scholarly journals Utjecaj dodatka antioksidanasa na oksidacijsku stabilnost goveđeg loja

Meso ◽  
2019 ◽  
Vol 21 (1) ◽  
pp. 52-61
Author(s):  
Tihomir Moslavac ◽  
Stela Jokić ◽  
Ana Mrgan ◽  
Štefica Grgić ◽  
Antun Jozinović ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Antioxidant Activity ◽  
Oxidative Stability ◽  
Peroxide Value ◽  
Beef Tallow ◽  
Natural Antioxidants ◽  
Alpha Tocopherol ◽  
Rosemary Extract ◽  
Synthetic Antioxidants ◽  
The Stability

Influence of antioxidants on oxidative stability of beef tallow Fats are contained in the majority of foods that are consumed daily. Beef tallow is one of the most complex fats found in nature. Tallow is subject to oxidation during the production, storage and heat treatment. This study researched the effect of natural antioxidants (rosemary extract type Oxy’Less CS and type StabilEnhance, sage extract, alpha tocopherol, mixture tocopherol) and synthetic antioxidants (PG, BHA) on the oxidative stability of beef tallow. The oxidative stability of beef tallow, with and without added antioxidant, was evaluated using the sustainability test at 98 oC. The results are expressed as peroxide value (mmol O2/kg) obtained after storing the sample for a certain period of time at the temperature of 98°C. The results showed that applied antioxidants successfully stabilized the beef tallow. Among natural antioxidants, rosemary extract type Oxy'Less CS showed a higher antioxidant activity in beef tallow. In comparison with other tested antioxidants, it achieved greater efficiency in protecting the beef tallow from oxidation. Synthetic antioxidants propyl galate and butylhydroxyanisole successfully increased the stability of beef tallow, whereby propyl galate showed a higher antioxidant activity.

scholarly journals Competing Role of Bioactive Constituents inMoringa oleiferaExtract and Conventional Nutrition Feed on the Performance of Cobb 500 Broilers

2015 ◽  
Vol 2015 ◽  
pp. 1-13 ◽  
Author(s):  
Govindarajan Karthivashan ◽  
Palanisamy Arulselvan ◽  
Abd. Razak Alimon ◽  
Intan Safinar Ismail ◽  
Sharida Fakurazi
Keyword(s):  
Antioxidant Activity ◽  
Meat Quality ◽  
Antioxidant Status ◽  
Cost Effective ◽  
Bioactive Constituents ◽  
Broiler Meat ◽  
Antioxidant Parameters ◽  
Antioxidant Effects

The influence ofMoringa oleifera(MO) leaf extract as a dietary supplement on the growth performance and antioxidant parameters was evaluated on broiler meat and the compounds responsible for the corresponding antioxidant activity were identified. 0.5%, 1.0%, and 1.5% w/v of MO leaf aqueous extracts (MOLE) were prepared, and nutritional feed supplemented with 0%, 0.5%, 1.0%, and 1.5% w/w of MO leaf meal (MOLM) extracts were also prepared and analysed for theirin vitroantioxidant potential. Furthermore, the treated broiler groups (control (T1) and treatment (T2, T3, and T4)) were evaluated for performance, meat quality, and antioxidant status. The results of this study revealed that, among the broilers fed MOLM, the broilers fed 0.5% w/w MOLM (T2) exhibited enhanced meat quality and antioxidant status (P<0.05). However, the antioxidant activity of the MOLE is greater than that of the MOLM. The LC-MS/MS analysis of MOLM showed high expression of isoflavones and fatty acids from soy and corn source, which antagonistically inhibit the expression of the flavonoids/phenols in the MO leaves thereby masking its antioxidant effects. Thus, altering the soy and corn gradients in conventional nutrition feed with 0.5% w/w MO leaves supplement would provide an efficient and cost-effective feed supplement.

scholarly journals OXIDATIVE STABILITY OF MAYONNAISE SUPPLEMENTED WITH ESSENTIAL OIL OF ACHILLEA MILLEFOLIUM SSP MILLEFOLIUM DURING STORAGE

2019 ◽  
Vol 13 (1) ◽  
Author(s):  
Asiye Ahmadi-Dastgerdi ◽  
Hamid Ezzatpanah ◽  
Sedighe Asgary ◽  
Shahram Dokhani ◽  
Ebrahim Rahimi ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Essential Oil ◽  
Lipid Oxidation ◽  
Essential Oils ◽  
Oxidative Stability ◽  
Control Sample ◽  
Thiobarbituric Acid ◽  
Natural Antioxidants ◽  
Achillea Millefolium ◽  
Totox Value

Lipid oxidation is the main chemical process affecting mayonnaise deterioration. Today, essential oils from aromatic plants have been qualified as natural antioxidants and proposed as potential substitutes of synthetic antioxidants in food products. In this research, antioxidant activity of Achillea millefolium essential oil was determined based on oxidative stability of treated mayonnaise (homogenized) during 6 months of storage at 4°C. The following analysis were performed: peroxide value (PV), anisidine value (AV), Totox value and thiobarbituric acid (TBA) to assess the extent of oil deterioration. Mayonnaise samples were divided into three experimental treatments, namely: E.O (essential oil in concentrations: 3.83, 5.85 and 7.2 mg/ml), T (TBHQ in concentration: 0.12 mg/ml) and C (control: no antioxidant). Subsequently, the samples from each treatment were stored at 4 oC. The results showed that the treatments containing essential oil and TBHQ significantly reduced the oxidation (p < 0.05), while the control sample was oxidized faster. Among the essential oils, concentrations of 5.85 and 7.2 mg/ml showed the best antioxidant activity. PV, TBA, AV and totox values increased during the storage time for all treatments. Our results suggest that essential oil of Achillea millefolium has potential source of natural antioxidant for the application in food industries to prevent lipid oxidation particularly lipid-containing foods such as mayonnaise, due to its reaction with oxidative free radicals and therefore can increase food shelf life.

scholarly journals Comparison of Antioxidative Efficacy of Ginkgo Biloba Leaves and Acer Palmatum Leaves

2020 ◽  
Vol 11 (SPL4) ◽  
pp. 433-437
Author(s):  
Jang Soon Park
Keyword(s):  
Antioxidant Activity ◽  
Ginkgo Biloba ◽  
Raw Materials ◽  
Radical Scavenging ◽  
Natural Antioxidants ◽  
Activity Measurement ◽  
Total Polyphenol ◽  
Dpph Activity ◽  
Radical Scavenging Ability ◽  
Antioxidant Effects

Modern people pay attention to the antioxidant effects that protect human aging and damage, but active ingredients used in cosmetics or pharmaceutical raw materials of synthetic ingredients are exposed to a number of problems. An alternative method for solving the problem was selected, and Ginkgo Biloba Leaves (GBL) and Acer Palmatum Leaves (APL) were selected to compare and analyze antioxidant efficacy evaluations such as total polyphenol, total flavonoid, DPPH ability, ABTS radical scavenging ability, and FRAP activity measurement. In the results of the study, GBL and APL showed DPPH activity at all concentrations (μg/ml). ABTS activity and FRAP Value also showed antioxidant activity in both GBL and APL and in particular, APL has been found to be potent and is considered a rich antioxidant. ABTS activity and FRAP Value also showed antioxidant activity in both GBL and APL, and in particular, APL has been found to be more potent. Therefore, these species can be evaluated as rich antioxidants. This study hopes to provide GBL and APL extracts as data for the development of natural antioxidants in cosmetics and pharmaceuticals.

scholarly journals Analysis of Antioxidant Efficacy of Ginkgo Biloba Leaves and Acer Palmatum Leaves

2021 ◽  
Vol 12 (6) ◽  
pp. 698-703
Author(s):  
Jang Soon Park
Keyword(s):  
Antioxidant Activity ◽  
Ginkgo Biloba ◽  
Raw Materials ◽  
Radical Scavenging ◽  
Natural Antioxidants ◽  
Activity Measurement ◽  
Total Polyphenol ◽  
Dpph Activity ◽  
Radical Scavenging Ability ◽  
Antioxidant Effects

Background/Objectives: Modern people pay attention to the antioxidant effects that protect human aging and damage, but active ingredients used in cosmetics or pharmaceutical raw materials of synthetic ingredients are exposed to a number of problems. Methods/Statistical analysis: An alternative method for solving the problem was selected, and Ginkgo biloba Leaves (hereinafter GBL) and Acer palmatum Leaves (hereinafter APL) were selected to compare and analyze antioxidant efficacy evaluations such as total polyphenol, total flavonoid, DPPH ability, ABTS radical scavenging ability, and FRAP activity measurement. Findings: In the results of the study, GBL and APL showed DPPH activity at all concentrations (㎍/㎖). ABTS activity and FRAP Value also showed antioxidant activity in both GBL and APL, and in particular, APL has been found to be potent and is considered a rich antioxidant. Improvements/Applications: ABTS activity and FRAP Value also showed antioxidant activity in both GBL and APL, and in particular, APL has been found to be more potent. Therefore, these species can be evaluated as rich antioxidants. This study hopes to provide GBL and APL extracts as data for the development of natural antioxidants in cosmetics and pharmaceuticals.

scholarly journals Comparative study on the antioxidant activities of ten common flower teas from China

2019 ◽  
Vol 17 (1) ◽  
pp. 841-848
Author(s):  
Xiao-Fang Hu ◽  
Zong-Bao Ding ◽  
Yue Chen ◽  
Jiang-Fu Luo ◽  
Jian-Min He ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Comparative Study ◽  
Food Industry ◽  
Functional Foods ◽  
Antioxidant Activities ◽  
Natural Antioxidants ◽  
Antioxidant Effect ◽  
Total Phenolic ◽  
The World ◽  
Antioxidant Effects

AbstractFlower teas are widely consumed across the world because of their beneficial health effects. The antioxidant activities of methanol extracts from ten common flower teas in China were evaluated using four antioxidant assays. The total phenolic (TPCs) and total flavonoid contents (TFCs) were also investigated. Most of these flower teas exhibited potent antioxidant effects, of which rosae rugosae flos exerted the strongest antioxidant effects in four assays. Rosae rugosae flos also exerted the highest TPC, while fragrans showed the highest TFC. Correction analysis indicated that phenolics play a key role in the antioxidant effect of flower teas, while flavonoids were poorly correlated with antioxidant activity. The results supported the consumption of flower teas as functional foods and their application as sources of natural antioxidants in the food industry.

scholarly journals Antioxidant Properties of Soybean Oil Supplemented with Ginger and Turmeric Powders

2020 ◽  
Vol 10 (23) ◽  
pp. 8438
Author(s):  
Federica Tinello ◽  
Stefania Zannoni ◽  
Anna Lante
Keyword(s):  
Antioxidant Activity ◽  
Soybean Oil ◽  
Oxidative Stability ◽  
Antioxidant Properties ◽  
Natural Antioxidants ◽  
Added Value ◽  
Human Consumption ◽  
Total Polyphenols ◽  
Lipid Stability ◽  
Freeze Dried

Soybean oil has been supplemented with 10% (w/w) of ginger and turmeric powders derived from commercial products (GC—commercial ginger and TC—commercial turmeric), freeze-dried rhizomes (freeze-dried ginger (GR) and freeze-dried turmeric rhizome—TR) and peels (freeze-dried ginger peel (GP) and freeze-dried turmeric peel—TP) for developing a functional seasoning with great lipid stability for human consumption. The exhausted ginger and turmeric powders were also recovered and recycled two times to promote a more sustainable process. The antioxidant activity and oxidative stability of oil samples were evaluated respectively by spectrophotometric and Rancimat methods. Folin–Ciocalteu assay and HPLC analysis were also performed to quantify total polyphenols, ginger-derived 6-gingerol and 6-shogaol, and turmeric-derived curcumin. Their antioxidant activity as well as oxidative stability, which non-linearly decreased over cycles because of a strongly reduced phenolic extractability, linearly increased with increasing phenolic yields. Hence, ginger and turmeric can be proposed as healthy spices containing bioactive compounds to control lipid oxidation and improve oil stability. Moreover, the valorization of peels as eco-friendly source of natural antioxidants is a valid strategy for providing added-value to these agro-food wastes.

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