scholarly journals Natural Antioxidants: Innovative Extraction and Application in Foods

Foods ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 937
Author(s):  
Monica Rosa Loizzo ◽  
Ana Sanches Silva
Keyword(s):  
Natural Antioxidants ◽  
Marine Species ◽  
Biological Properties ◽  
Animal Products

Research has devoted great attention to the study of the biological properties of plants, animal products, microorganisms, marine species, and fungi, among others, often driven by the need to discover new medicines [...]

Polyphenol Contents, Antioxidant and Antibacterial Activities of Aqueous Algerian Propolis Extracts

2021 ◽  
Author(s):  
E.K. Soltani ◽  
K. Zaim ◽  
K. Mokhnache ◽  
N. Haichour ◽  
S. Mezaache-Aichour ◽  
...  
Keyword(s):  
Aqueous Extract ◽  
Antioxidant Activities ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Antibacterial Properties ◽  
Natural Antioxidants ◽  
Antibacterial Activities ◽  
Antimicrobial Activities ◽  
Biological Properties ◽  
Aqueous Extracts

The propolis, an extremely complex resinous material, exhibits valuable pharmacological and biological properties, mainly attributed to the presence of polyphenols. The composition of propolis depends on time, vegetation, and the area of collection. Total flavonoid and polyphenol contents of aqueous extracts of propolis samples from different areas of Algeria, determined by using aluminum chloride and Folin–Ciocalteu colorimetric methods, were in the range of 3.047 ± 0.004–5.273 ± 0.013 mg/g and 96.833 ± 0.027–458.833 ± 0.0005 mg/g crude extract of propolis, respectively. This study examined the antioxidant and antimicrobial activities of propolis. Aqueous extracts of propolis were obtained in order to evaluate their antioxidant activities by using 1,1-diphenyl-2-picrylhydrazyl (DPPH) free radical scavenging, β-carotene and electrochemical assays. All tested propolis samples had relatively strong antioxidant activities, which were also correlated with the total polyphenol and flavonoid content present. The percentage of inhibition of lipid peroxidation of linoleic acid emulsion during 24 h varied between 86.04 ± 0.42 and 90.60 ± 3.77% among the tested samples. The highest DPPH radical scavenging activity was observed by ABAL (Ain Abassa Aqueous Extract) with IC50 = 8.49 ± 5.07 10−5 μg/ml, and the lowest was observed by SAL (Setif Aqueous Extract) with IC50 of 21.16 ± 0.0001 μg/ml. The most important antibacterial activity was obtained with Ain Abassa extract; the zones of inhibition obtained for this excerpt vary from 15.22 to 15.5 mm. Followed by the Setif extract with areas of 12.33 to 12.75 mm, the Tizi-Ouzou extract with areas of 10.11 to 11.11 mm. This study will bring an innovation for further studies with regard to the antioxidant and antibacterial properties of the aqueous extracts of propolis. This study corroborates that Algerian propolis is a rich source of natural antioxidants, properties which could be used in the prevention of different diseases, both in humans and in animals.

scholarly journals Spectroscopic, Theoretical and Antioxidant Study of 3d-Transition Metals (Co(II), Ni(II), Cu(II), Zn(II)) Complexes with Cichoric Acid

Materials ◽  
2020 ◽  
Vol 13 (14) ◽  
pp. 3102 ◽  
Author(s):  
Grzegorz Świderski ◽  
Agata Jabłońska-Trypuć ◽  
Monika Kalinowska ◽  
Renata Świsłocka ◽  
Danuta Karpowicz ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Transition Metals ◽  
Density Functional ◽  
Theoretical Calculations ◽  
Wide Spectrum ◽  
Natural Antioxidants ◽  
Electronic System ◽  
Biological Properties ◽  
Cichoric Acid ◽  
Antioxidant Power

Cichoric acid (CA) is a derivative of both caffeic acid and tartaric acid. It was isolated for the first time from Cichorium intybus L. (chicory) but it also occurs in significant amounts in Echinacea, particularly E. purpurea, dandelion leaves, basil, lemon balm and in aquatic plants, including algae and sea grasses. It has a wide spectrum of biological properties, including antioxidant, antiviral, anti-inflammatory and other. The work yielded cichoric acid complexes with selected transition metals, i.e., copper(II), nickel(II), zinc(II) and cobalt(II). In this work the dependency between the molecular structure and biological activity was discussed. The molecular structure was studied by means of infrared spectroscopy (Fourier transform infrared (FT-IR) Raman (FT-Raman)), electronic absorption spectroscopy (ultraviolet–visible (UV/VIS)) and theoretical calculations (density functional theory (DFT), Hartree–Fock (HF)). Understanding the mechanism of the effect of metals on the electronic system of ligands with biological importance will facilitate in the future the search for new, effective and natural antioxidants. The composition of the studied complexes in aqueous solutions was determined at a constant pH by the Job’s method. Antioxidative properties of the tested compounds were determined using the ferric-reducing antioxidant power (FRAP), DPPH (2,2-diphenyl-1-picryl-hydrazyl-hydrate free radical method), cupric-reducing antioxidant capacity (CUPRAC) and Superoxide Dismutase Activity Assay (SOD).

Comparing irrigated biodynamic and conventionally managed dairy farms. 1. Soil and pasture properties

2007 ◽  
Vol 47 (5) ◽  
pp. 479 ◽  
Author(s):  
L. L. Burkitt ◽  
D. R. Small ◽  
J. W. McDonald ◽  
W. J. Wales ◽  
M. L. Jenkin
Keyword(s):  
Cattle Breed ◽  
Farming Systems ◽  
Dairy Farms ◽  
Farming System ◽  
Biological Properties ◽  
Water Runoff ◽  
Animal Products ◽  
Soil P ◽  
Extractable P ◽  
P Balance

Ten paired irrigated dairy farms under biodynamic (BD) and conventional (CV) management were compared over a 4-year period (1991–94). The paired farms were located in the irrigation districts of northern Victoria and southern New South Wales and were matched for soil type, climate, cattle breed and farm area. Farms had been practising BD principles for an average of 16 years before the commencement of the study and had not received phosphorus (P) fertiliser for an average of 17 years. The effects of farm management on soil chemical and biological properties and the nutritive properties and botanical composition of pasture were examined at varying sampling times during the study. Soil Olsen extractable P concentrations were consistently 2–3 times higher under CV management at various sampling depths (mean = 22 mg/kg, 0–10 cm), and were generally marginal under BD management in the surface 10 cm (mean = 8.5 mg/kg). Low soil extractable P concentrations were also reflected in consistently lower mean pasture P concentrations under BD management (0.25 compared with 0.35% on CV farms). Lower soil and pasture P concentrations under BD management were the result of a large negative P balance across BD farms (–17 kg P/ha.year). A mean negative P balance under BD management was a result of low P imports (2 kg P/ha.year) in comparison with large quantities of P (19 kg P/ha.year) effectively lost from the farming system through animal products, estimated losses in water runoff and slowly reversible soil P reactions. These results suggest that greater P imports are required to ensure the future sustainability of BD dairy pasture farming systems. There were few differences in soil biological properties, with earthworm weights significantly higher under CV management, but no difference in soil organic carbon, humus concentration, the weight of the organic mat or microbial biomass, between the two management systems.

scholarly journals Sea buckthorn (Hippophae rhamnoides L.) as a potential source of nutraceutics and its therapeutic possibilities - a review

2015 ◽  
Vol 84 (3) ◽  
pp. 257-268 ◽  
Author(s):  
Jana Krejcarová ◽  
Eva Straková ◽  
Pavel Suchý ◽  
Ivan Herzig ◽  
Kateřina Karásková
Keyword(s):  
Natural Antioxidants ◽  
Sea Buckthorn ◽  
Hippophae Rhamnoides ◽  
Animal Nutrition ◽  
Animal Products ◽  
Positive Effects ◽  
Hippophaë Rhamnoides ◽  
Potential Source ◽  
Whole Plant ◽  
Active Substances

Sea buckthorn (Hippophae rhamnoides L.) is in the focus of interest mainly for its positive effects on health of both human and animal organisms. The whole plant of sea buckthorn and especially its berries are a source of a large number of different bioactive compounds. The greatest attention has been drawn to its high content of vitamins, minerals, natural antioxidants, n-3 and n-6 fatty acids, and proteins. Sea buckthorn is valued for its antioxidant, cardioprotective, antiatherogenic, antidiabetic, hepatoprotective, anti-carcinogenic, immunomodulatory, antiviral, antibacterial, anti-inflammatory and vasorelaxant effects. Due to these and other positive effects, the plant is included in both human and animal nutrition, in the latter case to increase the biological value of animal products. This review summarises the botanical characteristics of sea buckthorn, lists the bio-active substances contained in individual parts of the plant, their effects in the prevention of a number of different diseases and their possible utilisation in human and animal nutrition.

scholarly journals Bioactive lipids, antibacterial, hypoglycaemic, and antioxidant potentials of immature and mature Vicia faba L. seeds cultivated in tunisia

2020 ◽  
Vol 49 (3) ◽  
pp. 254-262
Author(s):  
A. Ferchichi ◽  
S. Harrabi ◽  
M. Feki ◽  
H. Fellah
Keyword(s):  
Vicia Faba ◽  
Functional Foods ◽  
Natural Antioxidants ◽  
Antibacterial Activities ◽  
Biological Properties ◽  
Human Consumption ◽  
Bioactive Lipids ◽  
Lack Of Information ◽  
Glucosidase Inhibitors ◽  
Immature Seeds

Both the immature and mature Vicia faba L. seeds are used for human consumption. However, there is a lack of information on the phytochemical composition and the potent biological properties of the immature seeds. The aim of the present study was to establish the profile of bioactive lipids as well as the antibacterial, antioxidant, and α-amylase and α-glucosidase inhibitory capacities of the immature and mature Vicia faba L. seeds. The studied petroleum ether extracts contain different bioactive compounds such as β-sitosterol, lupeol, β-amyrin, α-tocopherol, and γ-tocopherol. The extracts of the immature seeds exhibited higher antioxidant and antibacterial activities than those of mature ones. All tested extracts exerted higher inhibition on α-glucosidase than α-amylase. The immature seeds appeared as promising sources of natural antioxidants, antibacterial compounds, and α-amylase and α-glucosidase inhibitors. Thus, the immature Vicia faba L. seeds have a great potential as functional foods providing health beneficial properties.

scholarly journals Plant Polyphenols, More than Just Simple Natural Antioxidants: Oxidative Stress, Aging and Age-Related Diseases

Medicines ◽  
2020 ◽  
Vol 7 (5) ◽  
pp. 26 ◽  
Author(s):  
Christophe Hano ◽  
Duangjai Tungmunnithum
Keyword(s):  
Natural Antioxidants ◽  
Extraction Methods ◽  
Biological Properties ◽  
Modern Medicine ◽  
Special Issue ◽  
Aging Effects ◽  
Plant Polyphenols ◽  
Traditional Medicines ◽  
Age Related ◽  
The Status

The present editorial serves as an introduction to the Special Issue “Antioxidant and Anti-aging Action of Plant Polyphenols”. It also provides a summary of the polyphenols, their biological properties and possible functions as medicines, the importance of traditional medicines as a source of inspiration, the rationalization of new uses of plant extracts which lead to applications in modern medicine, the status of modern green-chemistry extraction methods, and some reflections on future prospects. Here, the articles from this Special Issue, and the main aspects of the antioxidant and anti-aging effects of plant polyphenols are discussed in the form of seven questions.

scholarly journals The Antioxidant Capacities of Natural Products 2019

Molecules ◽  
2020 ◽  
Vol 25 (23) ◽  
pp. 5676
Author(s):  
Susana M. Cardoso ◽  
Alessia Fassio
Keyword(s):  
Oxidative Stress ◽  
Natural Products ◽  
Chronic Diseases ◽  
Broad Spectrum ◽  
Natural Antioxidants ◽  
Biological Properties ◽  
Antioxidant Capacities

The search for new natural antioxidants is a growing area of research due to the broad spectrum of their biological properties, which are associated with the prevention of chronic diseases that originate in oxidative stress [...]

scholarly journals Dietary Polyphenol Supplementation in Food Producing Animals: Effects on the Quality of Derived Products

Animals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 401
Author(s):  
Valentina Serra ◽  
Giancarlo Salvatori ◽  
Grazia Pastorelli
Keyword(s):  
Dairy Products ◽  
Animal Feed ◽  
Saturated Fatty Acids ◽  
Meat Products ◽  
Natural Antioxidants ◽  
Alternative Source ◽  
Animal Products ◽  
Milk And Dairy Products

The growing interest in producing healthier animal products with a higher ratio of polyunsaturated to saturated fatty acids, is associated with an increase in lipoperoxidation. For this reason, it is essential to attenuate oxidative deterioration in the derived products. Natural antioxidants such as polyphenols represent a good candidate in this respect. The first part of the review highlights the occurrence, bioavailability, and the role of polyphenols in food-producing animals that, especially in intensive systems, are exposed to stressful situations in which oxidation plays a crucial role. The second part offers an overview of the effects of polyphenols either supplemented to the diet of monogastric and ruminants or added directly to meat and dairy products on the physicochemical and sensorial properties of the product. From this review emerges that polyphenols play an important, though not always clear, role in the quality of meat and meat products, milk and dairy products. It cannot be ruled out that different compounds or amounts of polyphenols may lead to different results. However, the inclusion of agro-industrial by-products rich in polyphenols, in animal feed, represents an innovative and alternative source of antioxidants as well as being useful in reducing environmental and economic impact.

Lipids in Ruminant Nutrition and Its Effect on Human Health

2021 ◽  
pp. 344-367
Author(s):  
Eman H. Elsabaawy ◽  
Sawsan M. Gad
Keyword(s):  
Fatty Acids ◽  
Human Health ◽  
Vegetable Oils ◽  
Scientific Evidence ◽  
Saturated Fatty Acids ◽  
Biological Properties ◽  
Human Consumption ◽  
Animal Products ◽  
Beneficial Effects ◽  
Total Fat

Scientific evidence and nutritional guidelines recommend a reduction in total fat intake, particularly of saturated fatty acids, which are associated with an increased risk of obesity, hypercholesterolemia, and cancer. Nutritionists recommend a higher intake of polyunsaturated fatty acids (PUFA), especially n-3 PUFA at the expense of n-6 PUFA. Besides the beneficial effects of n-3 fatty acids on human health, the conjugated linoleic acid (CLA) isomers have attracted increased attention as a result of their health promoting biological properties. As milk and meat are the main sources of CLA for human consumption, increasing such important nutrient in animal products is strongly recommended. Fat supplementation is one of the methods of increasing PUFA content in ruminant products, and it has been shown that PUFA can be increased in milk by supplementation with vegetable oils and oil seeds. Vegetable oils as equivalent to oilseeds show similar effects on CLA content in ruminant products.

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