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Artigos de revistas sobre o tema "Antioxidant"

Autor: Grafiati

Publicado: 4 de junho de 2021

Última modificação: 25 de julho de 2025

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1

Gonokami, Mio, Yoshimasa Yamamoto, Oraphin Chaikumpollert, Yoshito Ohtake, and Seiichi Kawahara. "ANTIOXIDANTS FOR EPDM SEALS EXPOSED TO CHLORINATED TAP WATER." Rubber Chemistry and Technology 87, no. 1 (2014): 1–9. http://dx.doi.org/10.5254/rct.13.87963.

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ABSTRACT A suitable antioxidant for a poly(ethylene-co-propylene-co-5-ethylidene-2-norbornene) (EPDM) seal in tap water applications was determined with respect to volatilization and decomposition of the antioxidants. Seals were prepared by mixing EPDM with 1 phr antioxidant and other ingredients followed by vulcanizing the mixture at 433 K for 20 min. The resulting EPDM seals were immersed into chlorinated water to investigate accelerated degradation. The change in antioxidant content was measured by gas chromatography/mass spectroscopy (GC/MS) and high-performance liquid chromatography (HPLC

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Buřičová, L., M. Andjelkovic, A. Čermáková, et al. "Antioxidant capacity and antioxidants of strawberry, blackberry, and raspberry leaves." Czech Journal of Food Sciences 29, No. 2 (2011): 181–89. http://dx.doi.org/10.17221/300/2010-cjfs.

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The total phenolic content (Folin-Ciocalteu method), free radical scavenging ability expressed as DPPH value, ferric reducing antioxidant capacity (FRAP), and oxygen radical absorbance capacity (ORAC) were determined in water extracts of leaves from Rosaceae family plants (Fragaria vesca L., Rubus fructicosus L., and Rubus idaeus L.). The antioxidant capacities of the extracts (in the order of the above mentioned methods) were 73.6&ndash;88.9%, 60.1&ndash;71.4%, 49.7&ndash;78.0% respectively, and 45.3&ndash;66.5% of that of green tea water extract. Further, the presence of 15 c

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Choudhary, BR, SM Haldhar, SK Maheshwari, R. Bhargava, and SK Sharma. "Phytochemicals and antioxidants in watermelon (Citrullus lanatus) genotypes under hot arid region." Indian Journal of Agricultural Sciences 85, no. 3 (2015): 414–17. https://doi.org/10.5281/zenodo.6814806.

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Ten genotypes of red-fleshed watermelon [Citrullus lantus (Thunb.)] were estimated for various health promoting bioactive compounds. The evaluated genotypes showed wide variability in total phenols, total flavonoids, tannin, total carotenoids and lycopene contents. The antioxidant activity was estimated by using in vitro assay of cupric reducing antioxidant capacity (CUPRAC). The significant difference (P=0.05) was observed among evaluated watermelon genotypes for different phytochemicals and antioxidants. The total phenols varied from 16.77 to 21.41 mg/g, total flavoniods 55.60 to 100.93 mg/1

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Shoker, Roaa M. H., Wasan Hamza Al-Shammery, and S. R. Al-Aidy. "A Review Article: Free Radical and Replacement Synthetic Antioxidant by Natural Antioxidant." Journal for Research in Applied Sciences and Biotechnology 2, no. 2 (2023): 206–11. http://dx.doi.org/10.55544/jrasb.2.2.29.

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Free radical may be responsible of several pathophysiology disease for threatening human life, and they are produced from endogenous and exogenous sources. Using the balanced amount of nutritious diet lead to a good health, may be neutralizing or scavenging free radicals by antioxidants compounds. daily diet have large number of vitamin A, E and C, carotenoids, polyphenols, etc. as natural antioxidants, the main bases of them are fruits, cereals, vegetables, and beverages. Enzymatic and non-enzymatic antioxidant substances are two different kinds that lessen the reactions of free radicals. In

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Smajić Bećić, Arnela, Ramzija Cvrk, Amela Kusur, Halid Junuzović, and Tijana Brčina. "Comparative analysis of the antioxidant capacity of some natural and synthetic antioxidants added to palm oil." Technologica acta 15, no. 2 (2023): 19–23. http://dx.doi.org/10.51558/2232-7568.2022.15.2.19.

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Various synthetic and natural antioxidants are used to reduce oxidation and its negative impact on the oil during the food frying process. Considering that some studies show the negative impact of synthetic antioxidants on the health of consumers, natural alternatives are being used more and more. BHA and BHT are synthetic antioxidants that are widely used in the food industryand a large number of natural compounds such as phenols, anthocyanins, flavonoids, vitamins, etc. show antioxidant properties. In this study, the antioxidant capacity of oregano and rosemary essential oil was tested and c

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Sadowska-Bartosz, Izabela, and Grzegorz Bartosz. "Effect of Antioxidants Supplementation on Aging and Longevity." BioMed Research International 2014 (2014): 1–17. http://dx.doi.org/10.1155/2014/404680.

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If aging is due to or contributed by free radical reactions, as postulated by the free radical theory of aging, lifespan of organisms should be extended by administration of exogenous antioxidants. This paper reviews data on model organisms concerning the effects of exogenous antioxidants (antioxidant vitamins, lipoic acid, coenzyme Q, melatonin, resveratrol, curcumin, other polyphenols, and synthetic antioxidants including antioxidant nanoparticles) on the lifespan of model organisms. Mechanisms of effects of antioxidants, often due to indirect antioxidant action or to action not related to t

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Pan, F. G., E. Q. Yang, J. Y. Xu, et al. "Review on preparation methods, mechanisms and applications for antioxidant peptides in oil." Grasas y Aceites 73, no. 4 (2022): e478. http://dx.doi.org/10.3989/gya.0560211.

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Natural antioxidants, especially those used in edible oil, are safer compared to chemically synthesized antioxidants. Therefore, research on natural antioxidants has become prevelant. Antioxidant peptides derived from food protein can effectively prevent oil oxidation. Protein hydrolyzation is widely applied for the production of antioxidant peptides in industry, and bioinformatics is employed nowadays to generate the desired peptide sequence. Furthermore, the mechanism of antioxidant peptides in the oil system is still controversial, which limits the further development of antioxidant peptide

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Pastor, Rosario, and Josep A. Tur. "Antioxidant Supplementation and Adaptive Response to Training: A Systematic Review." Current Pharmaceutical Design 25, no. 16 (2019): 1889–912. http://dx.doi.org/10.2174/1381612825666190701164923.

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Background: Antioxidant supplementation has become a common practice among athletes to theoretically achieve a reduction in oxidative stress, promote recovery and improve performance. Objective: To assess the effect of antioxidant supplements on exercise. Methods: A systematic literature search was performed up to January 2019 in MEDLINE via EBSCO and Pubmed, and in Web of Sciences based on the following terms: “antioxidants” [Major] AND “exercise” AND “adaptation”; “antioxidant supplement” AND “(exercise or physical activity)” AND “(adaptation or adjustment)” [MesH]. Thirty-six articles were

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Pokorný, J., Š. Schmidt, and H. T T Nguyen. "Functionality changes of natural antioxidants during food processing and storage." Czech Journal of Food Sciences 22, SI - Chem. Reactions in Foods V (2004): S80—S83. http://dx.doi.org/10.17221/10617-cjfs.

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Food raw materials and products contain inhibitors of oxidation reactions, both in the lipidic phase and the aqueous phase. The most important inhibitors are phenolic antioxidants. During food processing and storage, concentrations of antioxidants in the two phases reach an equilibrium. Phenolics react with lipidic free radicals, being converted into antioxidant free radicals, quinones, polymers and copolymers. Some degradation products possess an antioxidant activity, too. The relative antioxidant activity decreases with decreasing concentration of oxygen in the system and with increasing tem

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Siregar, Muhammad Septian Azhar, Eri Bachtiar, Atikah Nurhayati, and Muhammad Wahyudi Lewaru. "Antioxidant Activity of Gamat (Stichopus variegatus) and Milk Sea Cucumbers (Holothuria fuscocinerea) from the Thousand Islands National Park Waters." Journal of Aquaculture and Fish Health 12, no. 3 (2023): 390–404. http://dx.doi.org/10.20473/jafh.v12i3.35007.

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The frequent use of synthetic antioxidant compounds can cause degenerative diseases, especially consumers, so that natural antioxidant compounds are needed to reduce the risk of disease. One of the biotas that may contain potential as natural antioxidants is sea cucumber. Sea cucumbers are marine invertebrates that have therapeutic properties whose bioactive content has the potential as antioxidants. Thus, this study aims to determine the potential of two species of sea cucumber (Stichopus variegatus and Holothuria fuscocinerea) as natural antioxidant candidates as an alternative to synthetic

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Butterfield, D. Allan, and Jeffrey N. Keller. "Antioxidants and antioxidant treatment in disease." Biochimica et Biophysica Acta (BBA) - Molecular Basis of Disease 1822, no. 5 (2012): 615. http://dx.doi.org/10.1016/j.bbadis.2012.02.020.

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Singh, Poornima, Virginia Paul, and Ritu Dubey. "Antioxidant Foods." International Journal of Advances in Agricultural Science and Technology 9, no. 4 (2022): 1–7. http://dx.doi.org/10.47856/ijaast.2022.v09i04.001.

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Antioxidant is any substance that delays, prevents or removes oxidative damage to a target molecule. It can be found in many foods, including fruits and vegetables. The role of antioxidants in foods is to retard or control oxidation. The process of autoxidation and development of rancidity in foods involves a free radical chain mechanism via initiation, propagation and termination steps. While radicals are produced in the ‘initiation’ step, they react with unsaturated fatty acids by abstracting a hydrogen atom from a site which requires the least energy that is the allylic or diallylic positio

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Hassan Darwish, Hassan Darwish, Evan Brewer, et al. "Comparative antioxidant analysis using the iodine clock reaction: A kinetic approach." World Journal of Advanced Research and Reviews 25, no. 3 (2025): 406–10. https://doi.org/10.30574/wjarr.2025.25.3.0725.

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Aim: This study aims to evaluate the antioxidant capacity of black tea, turmeric, melatonin, and chamomile/lavender tea using the iodine clock reaction, a kinetic method for assessing antioxidant activity. Background: Oxidative stress, caused by an imbalance between free radicals and antioxidants, contributes to chronic diseases, including cardiovascular diseases and neurodegenerative disorders. Antioxidants play a crucial role in mitigating oxidative damage. Methods: The iodine clock reaction was utilized to assess antioxidant activity by measuring the delay in the oxidation process. Reaction

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Kamaluddin, Irna Diyana Kartika, Pratiwi Trisda Ramadhani, Irmayanti Haidir Bima, Andi Alamanda Irwan, and Rasfayanah F. Matoo. "Comparative Analysis of Antioxidants in Moringa Leaves and Soursop Leaves." Jurnal Biologi Tropis 24, no. 2 (2024): 81–88. http://dx.doi.org/10.29303/jbt.v24i2.6760.

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Antioxidants are chemical compounds that can donate one or more electrons to free radicals, so antioxidants function to neutralize free radicals. Antioxidants delay and inhibit cell damage through their properties that can neutralize free radicals. Several studies have reported that M.oleifera has antioxidant activity to various pharmacological effects such as anti-inflammatory and anti-cancer. Moringa oleifera or better known as Moringa is a plant that is widely used by the community to overcome various disease complaints. In addition to Moringa leaves, Soursop leaves (Annona muricata L) also

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Zazuli, Zulfan, Rika Hartati, Cornelia Rosasepti Rowa, Sukmadjaja Asyarie, and Satrialdi. "The Potential Application of Nanocarriers in Delivering Topical Antioxidants." Pharmaceuticals 18, no. 1 (2025): 56. https://doi.org/10.3390/ph18010056.

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The imbalance in the production of reactive oxygen species (ROS) with endogenous antioxidant capacity leads to oxidative stress, which drives many disorders, especially in the skin. In such conditions, supplementing exogenous antioxidants may help the body prevent the negative effect of ROS. However, the skin, as the outermost barrier of the body, provides a perfect barricade, making the antioxidant delivery complicated. Several strategies have been developed to enhance the penetration of antioxidants through the skin, one of which is nanotechnology. This review focuses on utilizing several na

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Carsono, Nono, Sefren Geiner Tumilaar, Dikdik Kurnia, Diding Latipudin, and Mieke Hermiawati Satari. "A Review of Bioactive Compounds and Antioxidant Activity Properties of Piper Species." Molecules 27, no. 19 (2022): 6774. http://dx.doi.org/10.3390/molecules27196774.

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Antioxidants are compounds that are able to inhibit the negative effects that come from free radicals. The phenomenon of imbalanced antioxidant production and the accumulation of free radicals in cells and tissues can cause oxidative stress. Excessive free radicals that enter the body cannot be warded off by endogenous antioxidant compounds so that the required antioxidant compounds can come from the outside, which helps in the performance of endogenous antioxidants. Antioxidants that come from outside consist of synthetic and natural antioxidants; however, synthetic antioxidants are not an op

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Olesia, Bilous, Sytnik Natalia, Bukhkalo Svitlana, et al. "DEVELOPMENT OF A FOOD ANTIOXIDANT COMPLEX OF PLANT ORIGIN." Eastern-European Journal of Enterprise Technologies 6, no. 11 (102) (2019): 66–73. https://doi.org/10.15587/1729-4061.2019.186442.

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An antioxidant complex has been developed for use in oils, fats, and food products, which must be enriched with biologically active substances of plant origin. Rational conditions have been examined for obtaining of water-ethanol extracts from plant raw materials: oak bark, eucalyptus leaves, and green tea leaves. An antioxidant has been derived capable of preventing the oxidation of fat-containing products, preserving their high nutritional value. The antioxidant substances of natural origin will make it possible to create products, balanced in composition, with prolonged shelf life while pre

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Patil, Kunal, and Vishwajit Nalawade. "A Review on Antioxidant Property of Herbal Tea." International Journal of Research Publication and Reviews 04, no. 01 (2022): 1627–33. http://dx.doi.org/10.55248/gengpi.2023.4146.

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Antioxidants are substances found in the medicinal plants which may have a protective role to play in certain conditions such as heart disease, stroke and some cancers. Polyphenols, which are antioxidant components, can be found in tea extracts. Natural antioxidants have gotten a lot of attention and research since they are effective due to free radical scavenger activity and are thought to be less hazardous than synthetic antioxidants. Tea, along with water, is one of the world's most popular beverages.tea(Camellia sinensis)have clasiifird into green tea,black tea,oolong tea . Spectroscopy is

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Petrescu, Florian Ion Tiberiu, Relly Victoria Virgil Petrescu, and Eleni Mimi Buzea. "New natural antioxidants." Independent Journal of Management & Production 11, no. 3 (2020): 967. http://dx.doi.org/10.14807/ijmp.v11i3.938.

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Antioxidants are, no doubt, an essential part of an optimal health and even traditional doctors support the importance of an appropriate contribution of antioxidants taken through food. Antioxidants are a category of molecules able to inhibit the oxidation of other molecules. The body distributes various nutrients in the body due to their antioxidant properties and also factory antioxidant enzymes to keep under control the reaction in the chain of free radicals. Some antioxidants are produced by the body, but others don't. In addition, the body's natural ability to produce antioxidants decreas

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Nikitina, O. A., M. A. Darenskaya, N. V. Semenova, and L. I. Kolesnikova. "Antioxidant defense system: regulation of metabolic processes, genetic determinants, methods of determination." Сибирский научный медицинский журнал 42, no. 3 (2022): 4–17. http://dx.doi.org/10.18699/ssmj20220301.

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An increase in peroxidation activity is considered as a nonspecific process characteristic of the pathogenesis of various diseases accompanied by antioxidant deficiency. As bioregulators that can increase defense, antioxidants are important links in a multi-stage system of regulation and coordination of various body functions. The structure and function of enzymes involved in the regulation of oxidative stress can be significantly affected by genetic polymorphism. To date, the role of genes encoding the activity of enzymes of the antioxidant system in the pathogenesis of many diseases remains

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Sani, Abbas, and Sanusi Sani. "Antioxidant Vitamins and Minerals Composition of Fresh Carrot-Cabbage Juice." Bioremediation Science and Technology Research 10, no. 1 (2022): 10–13. http://dx.doi.org/10.54987/bstr.v10i1.682.

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Antioxidants are substances that protect cells from the damages caused by free radicals. Fruit and vegetables are rich in antioxidants and provide important sources of antioxidants. While the quest for an antioxidant supplement is ongoing, this study investigated the antioxidant vitamins and minerals composition of fresh carrot-cabbage juice. Antioxidant vitamins and minerals compositions of the juice were determined by standard methods using spectrophotometry and atomic absorption spectrophotometry (AAS) respectively. The concentration of antioxidant vitamins was found to be in the order; vit

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Saristiana, Yuneka, Achmad Wahdi, and Fendy Prasetyawan. "IDENTIFIKASI SENYAWA ANTIOKSIDAN EKSTRAK KULIT BUAH MANGGIS (Garcinia mangostana L.)." Well Being 9, no. 1 (2024): 71–79. http://dx.doi.org/10.51898/wb.v9i1.246.

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This study aims to identify the antioxidant classes in mangosteen rind (Garcinia mangostana L.), which is known to be rich in natural antioxidants. Antioxidants are compounds that can prevent or slow down cell damage caused by free radicals, which can form through metabolism or environmental exposure. The identification and utilization of natural sources of antioxidants are crucial for protecting cells from damage and supporting health. The research process began with the drying and grinding of mangosteen rind into a fine powder, which was then extracted using ethanol to obtain an antioxidant-

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De Oliveira Lemes, Erick, Michele Maria Carlos Fernandes, Valeria Paiva Rosa, and Adriano Honorato Nascimento. "Levantamento da Utilização do Pequi (Caryocar brasiliense camb.) como Agente Antioxidante na Prevenção de Doenças Neurodegenerativas." UNICIÊNCIAS 21, no. 2 (2017): 110. http://dx.doi.org/10.17921/1415-5141.2017v21n2p110-114.

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O cerrado é um patrimônio de recursos naturais renováveis, com espécies frutíferas, com características peculiares e intensas. O Caryocar brasiliense Camb. possui atividade antioxidante, conforme estudos realizados, o consumo de pequi regularmente pode agir de forma a minimizar esse desequilíbrio, com a diminuição do nível de radicais livres no organismo humano. As doenças neurodegenerativas levam à perda de função e estrutura neuronal, sendo um grave problema de saúde pública, o número de casos cresce a cada ano. Estas doenças são associadas ao desequilíbrio entre a produção de radicais livre

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Mamataeva, А. Т., Sh А. Abzhanova, А. N. Aralbaeva, R. S. Utegalieva, G. А. Saginbek, and K. I. Almagambetova. "The use of plants with high antioxidant activity in cooking." Journal of Almaty Technological University, no. 3 (September 24, 2022): 19–25. http://dx.doi.org/10.48184/2304-568x-2022-3-19-25.

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The quality of food has a significant impact on human health and longevity. Antioxidants are found in large quantities in herbaceous plants. Therefore, foods with high antioxidant activity can be considered one aspect of their quality. Antioxidants, in turn, are a form of activity that inhibits the free-radical oxidative processes that occur in living organisms. Consumption of foods high in antioxidants helps maintain normal human health. Antioxidants are used as food supplements or in prepared meals. Therefore, this article discusses the preparation of food using herbs with high antioxidant a

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Chandra, Gorre Vijaya, Lakshmi Bavisetti, and V. D. N. Kumar Abbaraju. "Migration of Leachables Amount of Antioxidants and Vulcanizers: Analytical Method Development and Validation for Antineoplastic Drug Injection by HPLC." International Journal of Drug Delivery Technology 15, no. 02 (2025): 01–09. https://doi.org/10.25258/ijddt.15.2.38.

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An HPLC method for the analysis of leachables amounts of Antioxidants and vulcanizers was developed and validated. The method was developed and validated for quantitation on six targeted Antioxidants and vulcanizers in rubber stoppers of antineoplastic Drug Injection. Methods: The analytical method used to determine the leachableamount of antioxidants (BHT,Antioxidant 1010, Antioxidant 1330, Antioxidant 1076, Antioxidant 168) and vulcanizer(Sulfur) in packaging materials for Melphalan Hydrochloride as Injection 50mg/vial and sterile diluent to Melphalan as Injection 10.00mg/vial by HPLC method

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Gharehbeglou, Pouria, and Seid Mahdi Jafari. "Antioxidant Components of Brassica Vegetables Including Turnip and the Influence of Processing and Storage on their Anti-oxidative Properties." Current Medicinal Chemistry 26, no. 24 (2019): 4559–72. http://dx.doi.org/10.2174/0929867325666181115111040.

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Brassica vegetables, particularly turnip, contain many natural antioxidants. This review focuses on antioxidant components and the influence of different processing and storage conditions on antioxidant activities of some Brassica vegetables including turnip. Long storage times had an adverse effect on antioxidant value of turnip. Also, the activity of antioxidants in cruciferous vegetables could be influenced by antioxidant breakdown and leaching during cooking. Heat treatment has a major impact on the antioxidant activity of Brassica vegetables and it has been perceived minor antioxidant abi

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Apak, Reşat, Shela Gorinstein, Volker Böhm, Karen M. Schaich, Mustafa Özyürek, and Kubilay Güçlü. "Methods of measurement and evaluation of natural antioxidant capacity/activity (IUPAC Technical Report)." Pure and Applied Chemistry 85, no. 5 (2013): 957–98. http://dx.doi.org/10.1351/pac-rep-12-07-15.

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The chemical diversity of natural antioxidants (AOXs) makes it difficult to separate, detect, and quantify individual antioxidants from a complex food/biological matrix. Moreover, the total antioxidant power is often more meaningful to evaluate health beneficial effects because of the cooperative action of individual antioxidant species. Currently, there is no single antioxidant assay for food labeling because of the lack of standard quantification methods. Antioxidant assays may be broadly classified as the electron transfer (ET)- and hydrogen atom transfer (HAT)-based assays. The results obt

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Shen, Yanqiu, Xinyi Cheng, Hui Gu, Guihong Zhou, Hui Xia, and Dong Liang. "Determination of Antioxidant Compounds and Antioxidant Activity of Six Table Grapes with Red Skin." E3S Web of Conferences 145 (2020): 01004. http://dx.doi.org/10.1051/e3sconf/202014501004.

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Red grapes are a better source of antioxidants. Although studies have reported the major antioxidant contents and activities of grape cultivars, but the literature lacks information on detailed antioxidant composition and capacities of grape cultivars grown with rain-shelter-cultivation in Chengdu plain, south of China. In the present study, the total phenolics content (TPC), total flavonoids content (TFC), total flavanols content (TFAC), total anthocyanins content (TMAC) and antioxidant activity (DPPH, ABTS and FRAP) were detected and the results will provide basic knowledge about antioxidant

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Pereira de Paiva, Miguel Henrique, Mayara Rafaela dos Reis, Maria da Conceição Calassa Albuquerque, Judite Oliveira Lima Albuquerque, and Vicente Galber Freitas Viana. "The use of foods and dietary supplements with antioxidant activity in the elderly/O uso de alimentos e suplementos alimentares com atividade antioxidante em idosos/El uso de los alimentos y suplementos dietéticos con actividad antioxidante en los anciano." Revista de Enfermagem da UFPI 3, no. 3 (2014): 21. http://dx.doi.org/10.26694/reufpi.v3i3.1498.

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ABSTRACT Objective: To describe the use of foods and dietary supplements with antioxidant activity in elderly patrons of two centers. Methods: Descriptive study of quantitative approach, developed within the Institutional Program for Scientific Initiation Scholarships School of Integral Differential, whose aim was to describe the use of foods and dietary supplements with antioxidant activity in the elderly. The sample consisted of 152 subjects aged over 60 years and active patrons in two Centres for the Elderly Living in the city of Teresina, Piauí, who willingly volunteered to accept answer t

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Iwit, Seswita, Ardi, and Auzar Syarif. "Activity Uji Aktivitas Antioksidan dan Kandungan Fitokimia Daun Benalu (Loranthus ferrugineus Roxb.) yang Tumbuh pada Ketinggian Tempat dan Inang Berbeda." KOVALEN: Jurnal Riset Kimia 10, no. 2 (2024): 135–46. http://dx.doi.org/10.22487/kovalen.2024.v10.i2.17288.

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Restrictions on synthetic antioxidants in several countries have caused the global community to switch to using natural antioxidants. One source of natural antioxidants is mistletoe leaves (Loranthus ferrugineus Roxb.).The presence of mistletoe in a place and host is an important aspect to pay attention to to get the best antioxidants. This research aims to determine the effect of different altitudes and host types on the antioxidant activity and phytochemical content of mistletoe leaves. This research was structured in a split-plot design with 2 factors, namely altitude (lowland and medium la

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Živković, Jelena, Slavica Sunarić, Nataša Trutić, Marko Denić, Gordana Kocić, and Tatjana Jovanović. "Antioxidants and Antioxidant Capacity of Human Milk / Antioksidansi i antioksidativni kapacitet humanog mleka." Acta Facultatis Medicae Naissensis 32, no. 2 (2015): 115–25. http://dx.doi.org/10.1515/afmnai-2015-0012.

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SUMMARY Milk contains plenty of enzymatic and non-enzymatic antioxidant components that probably account for the vital antioxidant protection of the infants at early stages of life against the development of complications induced by oxygen free radicals. Indigenous milk enzymes play a key role in regulating lactogenesis, including active involution of mammary gland. Moreover, they are essential constituents of antioxidation and the innate immune system of milk. Among antioxidant enzymes, superoxide dismutase, catalase and selenium-containing glutathione peroxidase have been demonstrated in hum

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Fujimoto, Taiki, and Hiroaki Gotoh. "Feature Selection for the Interpretation of Antioxidant Mechanisms in Plant Phenolics." Molecules 28, no. 3 (2023): 1454. http://dx.doi.org/10.3390/molecules28031454.

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Antioxidants, represented by plant phenolics, protect living tissues by scavenging reactive oxygen species through diverse reaction mechanisms. Research on antioxidants is often individualized, for example, focusing on the evaluation of their activity against a single reactive oxygen species or examining the antioxidant properties of compounds with similar structures. In this study, multivariate analysis was used to comprehensively examine antioxidant properties. Eighteen features were selected to explain the results of the antioxidant capacity tests. These selected features were then evaluate

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Syakri, Syamsuri, Nur Azizah Syahrana, Asrul Ismail, Karlina Amir Tahir, and Anshari Masri. "A Review: Testing Antioxidant Activity on Kawista Plants (Limonia acidissima L.) in Indonesia." Open Access Macedonian Journal of Medical Sciences 9, F (2021): 281–87. http://dx.doi.org/10.3889/oamjms.2021.6497.

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BACKGROUND: Antioxidants are natural ingredients that can block the oxidation process of free radicals that enter the body so that damage to body cells can be prevented. Kawista plants are one of the plants that have antioxidant activity. AIM: This article review aims to determine the compounds that have antioxidant activity found in Kawista plants, the method used in testing antioxidants on Kawista plants, and the IC50 value found in antioxidant testing on Kawista plants. METHODS: The method used in this study is the Population, Intervention, Control, and Outcome method through inclusion and

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SIKIRU, A. B., A. ARANGASAMY, I. C. ALEMEDE, S. S. A. EGENA, R. BHATTA, and S. B. N. RAO. "In vitro evaluation of antioxidant properties of Chlorella vulgaris and its derivatives for use as antioxidant supplements in animal production." Indian Journal of Animal Sciences 94, no. 1 (2024): 88–91. http://dx.doi.org/10.56093/ijans.v94.i1.131441.

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Bioactive compounds with varied functional properties found in microalgae such as Chlorella vulgaris can serve as antioxidants supplement against free radicals causing oxidative stress in food animals, but there is a need to quantify these antioxidants in the algae for effective applications. Therefore, this study quantified antioxidants in Chlorella vulgaris and derivatives prepared with the microalgae biomass for enhancing its application in animal nutrition. Eight derivatives prepared using the Chlorella vulgaris biomass were subjected to in vitro antioxidant supplements in animals for atte

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Roy, Uttam Kumer, Birthe Vejby Nielsen, and John James Milledge. "Antioxidant Production in Dunaliella." Applied Sciences 11, no. 9 (2021): 3959. http://dx.doi.org/10.3390/app11093959.

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Microalgae have become an attractive natural source of a diverse range of biomolecules, including enzymatic and non-enzymatic antioxidants; nevertheless, economically sustainable production of such compounds from microalgae biomass is still challenging. The main hurdles are: (a) increasing microalgae yield; (b) achieving optimal cultivation conditions; (c) energy-efficient and cost-effective downstream processing (extraction and purification); (d) optimal storage of post-processed antioxidant molecules. This review provides a detailed overview of enzymatic and non-enzymatic antioxidants in the

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M., Nazirah, Evangeline Yvonne S., A. M. Mohd Hafiz, and S. Mohd Sani. "A review of antioxidant potential from seaweeds - extraction, characterization, benefits and applications." Food Research 6, Supplementary 4 (2023): 58–64. http://dx.doi.org/10.26656/fr.2017.6(s4).008.

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Potential natural antioxidant from seaweeds is used to improve the oxidative stability of food. It also functions as an active ingredient. There are three classes of antioxidants consisting of vitamins, carotenoids and polyphenols. Researchers employ a variety of ways to evaluate antioxidant activity, including screening approaches and chemical composition. Solid-liquid extraction pressured liquid extraction, supercritical fluid extraction, and other green extraction techniques are among the seaweed antioxidant extraction methods commonly utilized and reviewed in this article. The aim of the r

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Dipak, Sontakke* Vinod Chavare Praful Patil Om lole Dhananjay Popalghat. "A Study on Antioxidant from Natural Origin." International Journal of Scientific Research and Technology 2, no. 5 (2025): 600–613. https://doi.org/10.5281/zenodo.15529360.

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Antioxidants Are The Defense System Of The Body Against The Damage Of Reactive Oxygen Species, Which Is Normally Produced During The Various Physiological Processes In The Body. There Are Various Sources Of These Antioxidants Like Endogenous Antioxidant Present In The Body And Exogenous Food Source. In Recent Decades, Alternate Of Synthetic Food Antioxidants By Natural Ones Has Fostered Interest On Vegetable Sources And The Screening Of Inexpensive Raw Materials Particularly From The Agriculture For Identifying New Antioxidants. Polyphenols Are The Significant Plant Compounds With Antioxidant

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Malinowska, Paulina. "Effect of flavonoids content on antioxidant activity of commercial cosmetic plant extracts." Herba Polonica 59, no. 3 (2013): 63–75. http://dx.doi.org/10.2478/hepo-2013-0017.

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Abstract The aim of this work was to evaluate the antioxidant capacity and flavonoids content in 10 commercial cosmetic plant extracts used in cosmetics industry. Antioxidant activity of plant extracts were measured using two methods: FRAP (Ferric Reducing Antioxidant Power) and TEAC (Trolox Equivalent Antioxidant Capacity). The relationship between flavonoids content and antioxidant capacity of plant extracts were checked. As a result of this research it was found that FRAP and TEAC values of plant extracts significantly depend on the flavonoids content. The highest antioxidant activity, both

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Bērziņa, Laima, and Inese Mieriņa. "Vanillic and Meldrum’s Acid Containing Antioxidant." Key Engineering Materials 933 (October 17, 2022): 162–68. http://dx.doi.org/10.4028/p-87z4f8.

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Oxidation is a natural part of the aerobic world. Usually oxidation is suppressed by adding various antioxidants. Although a huge amount of antioxidants is known, studies of more active antioxidants which could be used in smaller amounts are crucial. Previously we have demonstrated arylmethyl Meldrum`s acids as promising free radical scavengers. On the other hand various phenol type compounds represent one of the most diverse group of antioxidants. In this study, two types of antioxidants – 1,3-dicarbonyl and phenol – were combined in a single molecule to study the plausible synergistic effect

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Nizori, Addion, Elkanah Jayanti, Surhaini Surhaini, Ika Gusriani, Mursyid Mursyid, and Daniel Tua Purba. "Influence of Fermentation Conditions on The Antioxidant and Physico-Chemical of Arabica Coffee from Kerinci Region of Indonesia." Indonesian Food Science & Technology Journal 5, no. 1 (2021): 34–38. http://dx.doi.org/10.22437/ifstj.v5i1.17383.

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Abstract—Coffee quality can depend on several factors such as the species/varieties cultivated, the processing after the harvesting phase, geographical origin, and climatic factors. Fermentation is one of the post harvest technology that influence coffee chemical and sensory properties. This study was to determine the effect of fermentation time into antioxidant and physicochemical of Arabica coffee from Kerinci region Indonesia. Research design used was randomized complete design with 5 combinations of treatments, which are 12, 20, 28, 36, and 44 hours fermentation with 3 replicates. The resu

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Tusevski, Oliver, Aneta Kostovska, Ana Iloska, Ljubica Trajkovska, and Sonja Simic. "Phenolic production and antioxidant properties of some Macedonian medicinal plants." Open Life Sciences 9, no. 9 (2014): 888–900. http://dx.doi.org/10.2478/s11535-014-0322-1.

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AbstractInvestigations have been made to study the production of phenolic compounds (total phenolics, flavonoids and phenylpropanoids) and total antioxidant capacity in 27 Macedonian traditional medicinal plants to improve its potential as a source of natural antioxidants. Antioxidant potential of plant extracts was analyzed by five different assays: cupric reducing antioxidant capacity (CUPRAC), phosphomolybdenum method (PM), reducing power (RP), 2,2-diphenyl-1-picrylhydrazyl (DPPH·) and 2,2′-azinobis(3-ethylbenzothiazoline-6-sulphonic acid (ABTS·+) radical scavenging activity. Origanum vulga

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Meda, Srikala, Sharda Singh, Philip Palade, Sahil Tonk, and Sanjay Awasthi. "Oxidative stress in intensive care unit patients: a review of glutathione linked metabolism and lipid peroxidation." Southwest Respiratory and Critical Care Chronicles 7, no. 27 (2019): 7–35. http://dx.doi.org/10.12746/swrccc.v7i27.511.

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Despite clear evidence of increased oxidative stress in the blood and tissues of critically ill intensive care unit patients, consistent beneficial effects of many different antioxidants have not been observed, and antioxidant therapy has not yet translated into widely accepted clinical practice. The reasons for this are unclear, likely rooted in the complex and context dependent free radical behavior of antioxidants interacting with the process of lipid peroxidation. Control of lipid peroxidation is a crucial requirement for the beneficial effects of antioxidants, but the interactions of biol

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Sekti, Beta Herilla. "TEST OF ANTIOXIDANT CONTENT IN BLUE LOTUS (Nymphaea Stellata Wild) LEAVES WITH DPPH METHOD (1,1-Diphenyl-2-Picrylhydrazyl)." Jurnal Jamu Kusuma 1, no. 2 (2021): 46–50. http://dx.doi.org/10.37341/jurnaljamukusuma.v1i2.10.

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Antioxidants are compounds materials that can inhibit the rate of oxidation of other molecules or neutralize free radicals. Antioxidants can be obtained in synthetic or natural forms. Natural antioxidants can protect the human body from damage to active oxygen which can inhibit degenerative diseases and inhibit the production of fat and food. Natural antioxidants can be obtained from plants, one of which is the Blue Lotus Plant (Nymphaea Stellata Wild). To ensure the presence of antioxidants in this plant, the antioxidant activity was tested using the DPPH method. The DPPH method was used to d

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Bandaru, Aishwarya, and Prasuna Ravi Gyana. "Investigating unexplored cyanobacterium Desmonostoc salinum sp. in mangroves as a novel antioxidant source." Research Journal of Chemistry and Environment 28, no. 9 (2024): 67–76. http://dx.doi.org/10.25303/289rjce067076.

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Antioxidants are essential in the fight against free radicals which are linked to a number of diseases in humans. Synthetic antioxidants are stable and economical, but they come with health hazards. Mangrove cyanobacteria are being studied for their antioxidant properties in an effort to find natural substitutes. Desmonostoc salinum is isolated from industrial and mangrove sites in the study and antioxidant activity is evaluated. When compared to their industrial counterparts, mangrove isolates show better antioxidant qualities including a greater phenolic content and DPPH radical scavenging a

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Huyut, Zübeyir, Şükrü Beydemir, and İlhami Gülçin. "Antioxidant and Antiradical Properties of Selected Flavonoids and Phenolic Compounds." Biochemistry Research International 2017 (2017): 1–10. http://dx.doi.org/10.1155/2017/7616791.

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Phenolic compounds and flavonoids are known by their antioxidant properties and one of the most important sources for humans is the diet. Due to the harmful effects of synthetic antioxidants such as BHA and BHT, natural novel antioxidants have become the focus of attention for protecting foods and beverages and reducing oxidative stressin vivo. In the current study, we investigated the total antioxidant, metal chelating, Fe3+and Cu2+reduction, and free radical scavenging activities of some phenolic and flavonoid compounds including malvin, oenin, ID-8, silychristin, callistephin, pelargonin, 3

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Taufiq, Nuramaniyah, and Sulfiani Sulfiani. "Antioxidant Activity of Ethanol and n-hexane Extracts of Javanese Bark (Lannea coromandelica) Using the DPPH Method." Indo. J. Chem. Res. 11, no. 1 (2023): 43–48. http://dx.doi.org/10.30598//ijcr.2023.11-tau.

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Javanese bark (Lannea coromandelica) contains secondary metabolites of saponins, tannins, phenolics, and flavonoids. Flavonoids include aromatic compounds that are antioxidants. Antioxidants can inhibit the oxidation process that arises due to free radical reactions to form unreactive compounds. The active flavonoid compounds in counteracting free radicals are determined by the presence of the –OH (hydroxy) functional group. Flavonoid compounds that have antioxidant properties include catechins, flavones, flavanones, flavonols, chalcones, and isoflavones. This study aims to determine the antio

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Vardanyan, L. R., and S. A. Hayrapetyan. "Antioxidant Properties of Ethyl Acetate Osage Orange Extract (Maclura pomifera)." Herald of the Bauman Moscow State Technical University. Series Natural Sciences, no. 3 (102) (June 2022): 96–109. http://dx.doi.org/10.18698/1812-3368-2022-3-96-109.

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The antioxidant properties of ethyl acetate extracts of fruits, leaves and bark of the Osage orange (Maclura pomifera) tree were studied by a kinetic method using the example of a model reaction of cymene oxidation. The extracts exhibit antioxidant properties. Findings of the research show that fresh orange maclura fruits contain the greatest amount of antioxidants. At a temperature of 348 K, the effective content of antioxidant substances is 1.05 · 10--3 mol/(l · mg). The analysis of the effective content of antioxidants in each extract revealed that it decreases when the extract is stored at

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Munteanu, Irina Georgiana, and Constantin Apetrei. "A Review on Electrochemical Sensors and Biosensors Used in Assessing Antioxidant Activity." Antioxidants 11, no. 3 (2022): 584. http://dx.doi.org/10.3390/antiox11030584.

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Currently, there is growing interest in screening and quantifying antioxidants from biological samples in the quest for natural and effective antioxidants to combat free radical-related pathological complications. Antioxidants play an important role in human health and provide a defense against many diseases. Due to the valuable dietary role of these compounds, the analysis and determination of their amount in food is of particular importance. In recent years, many attempts have been made to provide simple, fast, and economical analytical approaches for the on-site detection and determination

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Скрыпник (Skrypnik), Любовь (Lyubov') Николаевна (Nikolaevna), and Алина (Alina) Андреевна (Andreevna) Курашова (Kurashova). "THE COMPARATIVE STUDY OF ANTIOXIDANT PROPERTIES OF SOME SAMBUCUS L. SPECIES." chemistry of plant raw material, no. 1 (March 6, 2019): 127–37. http://dx.doi.org/10.14258/jcprm.2019014037.

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The antioxidant properties of fruits, flowers, leaves, bark (or stem) of elderberry (Sambucus nigra L.), red elderberry (Sambucus racemosa L.) and dwarf elder (Sambucus ebulus L.) were investigated. The total content of anthocyanins and total phenolic compounds content by using of Folin-Ciocalteu assay were determined spectrophotometrically. The total content of water-soluble antioxidants was investigated by amperometric method. The antioxidant activity (AOA) of plant extracts was measured using DPPH (1,1-diphenyl-2-picrylhydrazyl) radical, ABTS (2,2’azinobis(3)ethylbenzthiazoline-6- sulfonic

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De Lima Franzen, Felipe, Janine Farias Menegaes, Jéssica Righi da Rosa, et al. "Antioxidant and Antimicrobial Activity of Edible Flower Extracts Obtained by Different Extraction Methods." Ensaios e Ciência C Biológicas Agrárias e da Saúde 25, no. 4 (2021): 513–20. http://dx.doi.org/10.17921/1415-6938.2021v25n4p513-520.

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Existe uma grande demanda no mercado por produtos naturais derivados de plantas. A atividade antioxidante e os compostos fenólicos proporcionam diversos efeitos benéficos à saúde humana. Além disso, as propriedades antimicrobianas de substâncias presentes em extratos vegetais e óleos essenciais, produzidos por plantas, são reconhecidas empiricamente há séculos e têm sido comprovadas cientificamente nos últimos anos. O objetivo deste trabalho foi avaliar o conteúdo de compostos fenólicos, flavonóides totais e capacidade antioxidante e antimicrobiana in vitro de extratos de pétalas de flores com

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