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Статті в журналах з теми "Plant-extracted antioxidants"
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Moroșan, Elena, Magdalena Mititelu, Doina Drăgănescu, Dumitru Lupuliasa, Emma Adriana Ozon, Oana Karampelas, Cerasela Elena Gîrd, et al. "Investigation into the Antioxidant Activity of Standardized Plant Extracts with Pharmaceutical Potential." Applied Sciences 11, no. 18 (September 17, 2021): 8685. http://dx.doi.org/10.3390/app11188685.
Повний текст джерелаАнотація:
Given the important role of antioxidants in the cellular degeneration process, as well as the increased interest in recent years related to the use of natural antioxidants in therapy, the present study aims to investigate the antioxidant activity of a new pharmaceutical product containing natural antioxidants extracted from plant raw materials. In a first step, the product conventionally named “CILTAG”, containing a mixture in equal proportions of 10% hydroalcoholic extractive solutions of dried plant raw materials from Medicaginis herba, Trifolii pratense flores, Ginkgo bilobae folium, Myrtilli fructus, and Cynosbati fructus, was obtained. In the second stage, the antioxidant activity of the hydroalcoholic extractive solutions included in the pharmaceutical product was tested by chemiluminescence and electrochemical methods and by the superoxide dismutase (SOD) method. The electrochemical determination of the antioxidant capacity of hydroalcoholic extractive solutions was based on a method that provides an indirect evaluation of the presumed antioxidant properties of some compounds using Trolox (6-hydroxy-2,5,7,8-tetramethylchroman-2-carboxylic acid), as a standard measurement. The experimental results indicate a significant antioxidant potential for both the analyzed plant extractive solutions that are part of CILTAG and the final product.
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Koubaa, Mohamed, Ameni Ktata, Francisco J. Barba, Nabil Grimi, Houcine Mhemdi, Fatma Bouaziz, Dorra Driss, and Semia Ellouz Chaabouni. "Water-soluble polysaccharides from Opuntia stricta Haw. fruit peels: recovery, identification and evaluation of their antioxidant activities." International Agrophysics 29, no. 3 (July 1, 2015): 299–306. http://dx.doi.org/10.1515/intag-2015-0035.
Повний текст джерелаАнотація:
Abstract Opuntia stricta Haw. is considered as one of the most common cactus plant growing in Tunisia. Extracting valuable compounds from its fruit peel, considered as by-product, is drawing more and more attention, making it on the verge of commercialization. Water-soluble polysaccharides were extracted from Opuntia stricta Haw. peels, and their chemical composition assessed using thin layer chromatography. The antioxidant activities of the extracted polysaccharides were assessed using 2,2-diphenyl-1-picrylhydrazyl free radical scavenging activity, total antioxidant activity and reducing power capacity. The extraction yield of water-soluble polysaccharides was 7.53±0.86%. The chemical composition revealed the presence of rhamnose, arabinose, glucose, mannose, galactose and galacturonic acid. The infra-red spectroscopic analysis showed a similar structure to that of Opuntia ficus-indica polysaccharide peels. Additionally, the extracted polysaccharides exhibited high antioxidant activities. In fact, the free radical scavenging activity (half inhibition concentration = 6.5 mg ml−1 with 94.9% inhibition at 50 mg ml−1), the total antioxidant activity (100 μg ascorbic acid equivalent at 50 mg polysaccharides) and the reducing power capacity (absorbance 700 nm = 0.7 at 50 mg ml−1), appeared to be interesting compared to natural and synthetic antioxidants. Therefore, water-soluble polysaccharides from Opuntia stricta Haw. fruit peels could be a natural alternative to replace synthetic antioxidants.
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Fadda, Angela, Daniele Sanna, El Hassan Sakar, Said Gharby, Maurizio Mulas, Silvia Medda, Nese Sahin Yesilcubuk, et al. "Innovative and Sustainable Technologies to Enhance the Oxidative Stability of Vegetable Oils." Sustainability 14, no. 2 (January 12, 2022): 849. http://dx.doi.org/10.3390/su14020849.
Повний текст джерелаАнотація:
To meet consumers’ demand for natural foods, edible oil producers and food processing industries are searching for alternatives to synthetic antioxidants to protect oils against oxidation. Antioxidant compounds extracted from different plant parts (e.g., flowers, leaves, roots, and seeds) or sourced from agri-food industries, including residues left after food processing, attract consumers for their health properties and natural origins. This review, starting from a literature research analysis, highlights the role of natural antioxidants in the protection of edible oils against oxidation, with an emphasis on the emerging and sustainable strategies to preserve oils against oxidative damage. Sustainability and health are the main concerns of food processing industries. In this context, the aim of this review is to highlight the emerging strategies for the enrichment of edible oils with biomolecules or extracts recovered from plant sources. The use of extracts obtained from vegetable wastes and by-products and the blending with oils extracted from various oil-bearing seeds is also pointed out as a sustainable approach. The safety concerns linked to the use of natural antioxidants for human health are also discussed. This review, using a multidisciplinary approach, provides an updated overview of the chemical, technological, sustainability, and safety aspects linked to oil protection.
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Lourenço, Sofia C., Margarida Moldão-Martins, and Vítor D. Alves. "Antioxidants of Natural Plant Origins: From Sources to Food Industry Applications." Molecules 24, no. 22 (November 15, 2019): 4132. http://dx.doi.org/10.3390/molecules24224132.
Повний текст джерелаАнотація:
In recent years, great interest has been focused on using natural antioxidants in food products, due to studies indicating possible adverse effects that may be related to the consumption of synthetic antioxidants. A variety of plant materials are known to be natural sources of antioxidants, such as herbs, spices, seeds, fruits and vegetables. The interest in these natural components is not only due to their biological value, but also to their economic impact, as most of them may be extracted from food by-products and under-exploited plant species. This article provides an overview of current knowledge on natural antioxidants: their sources, extraction methods and stabilization processes. In addition, recent studies on their applications in the food industry are also addressed; namely, as preservatives in different food products and in active films for packaging purposes and edible coatings.
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Mosca, Federica, Gádor Hidalgo, Juliana Villasante, and María Almajano. "Continuous or Batch Solid-Liquid Extraction of Antioxidant Compounds from Seeds of Sterculia apetala Plant and Kinetic Release Study." Molecules 23, no. 7 (July 18, 2018): 1759. http://dx.doi.org/10.3390/molecules23071759.
Повний текст джерелаАнотація:
This work has been intended to investigate the antioxidant properties of compounds extracted from seeds of Sterculia apetala (a plant from Central America) in order to add further results to the relatively poor existing literature on the beneficial properties of this plant. Different extraction methodologies were used such as batch or continuous extraction conditions using water or ethanol 50% as solvents. The kinetic study has allowed estimation of the effective diffusion coefficients in a continuous solid-liquid extraction, highlighting the strict dependence of the diffusion rate and temperature and kind of solvent, showing the highest diffusion rate with ethanol 50% at 60 °C. The comparison between different techniques and two solvents led to the selection of water as the best extraction solvent while batch mechanically-agitated extraction was the most efficient mode, with the benefits of use of an environmental-friendly solvent and reduction in process time to achieve a high amount of extracted phenolic compounds. The analysis techniques used were ABTS and Folin-Ciocalteau methods to investigate the antioxidant activity and quantify the Total Phenolic Content (TPC) respectively. Also, different fatty acids were extracted from Sterculia apetala seeds and analysed by Gas Chromatography in order to quantify other interesting chemical species besides antioxidants.
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Almanea, Abdulaziz, Gamal S. Abd El-Aziz, and Mohamed Morsi M. Ahmed. "The Potential Gastrointestinal Health Benefits of Thymus Vulgaris Essential Oil: A Review." Biomedical and Pharmacology Journal 12, no. 04 (December 24, 2019): 1793–99. http://dx.doi.org/10.13005/bpj/1810.
Повний текст джерелаАнотація:
In recent times, medicinal plants have received great attention worldwide due to their effective pharmacological properties and therapeutic benefits. Numerous chemical compounds extracted from various medicinal plants have manifold biological activities. Thymus vulgaris (TV) is a flowering plant with an aromatic odor that has been broadly applied in conventional medicine, food additives, and phyto-pharmaceutical preparations. It is recognized to have promising therapeutic potential for curing various types of diseases. The essential oil extracted from TV, which contains a high quantity of flavonoids, possess antioxidant and antimicrobial activities. Consequently, it could be utilized as a good source in developing novel natural antioxidants and antibiotics. This review explores some of the potential health benefits of TV essential oil (TVEO) on the gastrointestinal tract.
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Atun, Sri, Sri Handayani, Anna Rakhmawati, Nur Aini Purnamaningsih, Bian Ihda An Naila, and Astuti Lestari. "Study of Potential Phenolic Compounds from Stems of Dendrophthoe Falcata (Loranthaceae) Plant as Antioxidant and Antimicrobial Agents." Oriental Journal of Chemistry 34, no. 5 (October 18, 2018): 2342–49. http://dx.doi.org/10.13005/ojc/340515.
Повний текст джерелаАнотація:
Dendrophthoe falcata is a hemiparasitic plant that has been used in traditional medicine.The study was conducted to identify the total phenolic and flavonoid compounds, to test antioxidant, and antimicrobial activity of ethanol extract stems of D. falcata parasite on Melia azedarach host tree. The dry powder stems of D. falcata was extracted with ethanol. The ethanol extract was subsequently partitioned successively using n-hexane, chloroform, and ethyl acetate. Each fraction was analyzed by a quantitative phenolic and flavonoid content with spectrophotometer method, and tested as antioxidant and antimicrobial activites. Antioxidant activity was performed by 2,2-diphenyl-1-picrilhidrazil (DPPH) method, while antimicrobial assay used pathogenic bacteria by disk-diffusion method. The results concluded that the stem of D. falcata plant showed a high content of phenolic and flavonoid compounds, very high antioxidant and moderate antimicrobial activities. It was also found that stems of D. falcata contain potential phenolic compounds that can be used as natural antioxidants and the treatment of various infections caused by microbes.
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Dirgantara, Septriyanto, As’ari Nawawi, and Muhamad Insanu. "Uji Aktivitas Antioksidan Tiga Spesies Tanaman Sarang Semut (Famili: Rubiaceae) Asal Kabupaten Merauke, Papua." JURNAL BIOLOGI PAPUA 5, no. 1 (October 13, 2018): 10–14. http://dx.doi.org/10.31957/jbp.517.
Повний текст джерелаАнотація:
Sarang semut plant is one of indigenous medicinal plants of Merauke region, the Papua province. Local people use the bulb of sarang semut plants to cure inflammation, muscle pain and enhancing immunity. However rare research of the plants has been done especially on the antioxidant activity. The objective of this research was to investigate the antioxidant activity of three species of sarang semut plants which were Myrmecodia beccarii, Myrmecodia sp. and Hydnophytum sp. The test was necessary to identify the inhibitory concentration level of plant extract in blocking a free radical (IC50). Parts of plants were extracted with maceration using methanol for 3 x 24 h to produce concentrated methanol. Plant extracts of three species were then subject to antioxidant activity test based on free radical blocking of 1,1-Difenil-2-Pikrilhidrazil (DPPH) qualitatively and quantitatively using Ultraviolet-Visible spectrophotometry. The results showed the methanol extract of M. beccarii, Myrmecodia sp. and Hydnophytum sp. were active as antioxidants with IC50 from 8.18 ppm, 21.79 ppm, 25.31 ppm, respectively while Vitamin C as a control has IC50 7.85 ppm. In conclusion, three plant species of sarangsemut are potential as natural antioxidant and plant extracts of M. beccarii showed the highest antioxidant activity among others. Key words: Antioxidant, sarang semut plants, Rubiaceae, DPPH.
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Nutan, ,., Manas Kr Das, Gaurav Saxena, and Nitin Kumar. "To perform phytochemical screening and study the antioxidant potential of isolated compound from Hemidesmus indicus." Journal of Drug Delivery and Therapeutics 9, no. 2 (March 15, 2019): 188–91. http://dx.doi.org/10.22270/jddt.v9i2.2401.
Повний текст джерелаАнотація:
“Anantmul” is an important and widely used medicinal plant. The study aimed to determine the physicochemical composition, bioactive compounds and antioxidant activity of Hemidesmus indicus (Asclepiadaceae). The roots of the plant were collected and sequentially extracted using petroleum ether, ethyl acetate, and methanol. The preliminary phytochemical screening of extracts was carried out and found to be a good source of bioactive compounds. Biological activities of flavonoid and phenolic compounds have been discovered in several latest studies. Further phytochemical isolation was carried out, and Lupeol was isolated. Phenols are shown to be multifunctional antioxidants which will perform as singlet oxygen quenchers. Lupeol was evaluated for in-vitro antioxidant activity. It showed a correlation with antioxidant activity by DPPH (IC50 = 0.52, P 6 0.05) and H2O2 (IC50 = 0.43, P 6 0.05). The results show promising perspectives for the exploitation and use of anantmul rhizome as a constituent of anti-aging as well as anticancer diet.
Keywords: Anantmul, Lupeol, Antioxidant, DPPH
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Osman Adam, Osman Adam, Ragaa Satti Mohmmed Abadi, and Saad Mohamed Hussein Ayoub. "Antioxidant activity, Total Phenolic and Flavonoid Contents and Cytotoxic activity of Euphorbia aegyptiaca." Journal of Drug Delivery and Therapeutics 10, no. 2 (March 15, 2020): 37–41. http://dx.doi.org/10.22270/jddt.v10i2.3911.
Повний текст джерелаАнотація:
Euphorbia aegyptiaca is a herbaceous plant traditionally used in Sudan for treatment of various diseases, and the study of this plant is still limited. The aim of the present study was to screen the phytochemicals and to assess the Antioxidant activity, total phenolic, flavonoid contents and cytotoxic activity of Euphorbia aegyptiaca. The plant material was extracted successively by Soxhlet apparatus using n-hexane, chloroform and methanol. The chemical constituents of the extracts were carried out using the standard procedures. The Folin- Ciocalteu and Aluminium chloride method was employed to calculate the total phenolic and flavonoid content, respectively. The antioxidant activity, was assessed by measuring the scavenging activity of the DPPH (2.2Di (4-tert-octylphenyl)-1-picryl-hydrazyl) and Propyl Gallate as standard antioxidants. While cytotoxic activities were screened using brine shrimp. Phytochemical screening studies revealed that flavonoids, tannins, coumarins, saponins, sterols, terpenes, anthraquinones and alkaloids were the main phytochemicals present in extracts of E. aegyptiaca. The methanol extract showed the highest level of total phenolic contents (173.49±2.427 mg GAE/g) and flavonoid content (239.53±7.90 mg QE/g), and the highest antioxidant activity 89% with least (IC50 0.0449µg/ml), and the no toxicity against brine shrimp (LD50 3423.156). Furthermore, no toxicity in all extracts was observed. The present study is the first evaluation regarding the characterization of E. aegyptiaca and its safety, and the results demonstrate its antioxidant potential and suggest its safe therapeutic use. The results suggest that methanol extract is a rich source of phytochemicals and exhibits highest amount of and total phenolic, flavonoid content and significant antioxidant activity and it has no cytotoxic activity. E. aegyptiaca plant can be regarded as a promising Source of naturally occurring potential antioxidants.
Keywords: Euphorbia aegyptiaca, Sudan, Antioxidant, Total phenolic, total flavonoid, Cytotoxicity.
Дисертації з теми "Plant-extracted antioxidants"
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Березка, Тетяна Олександрівна. "Удосконалення технології високостійкого пива з використанням антиоксидантів з рослинної сировини". Thesis, Національний університет харчових технологій, 2014. http://repository.kpi.kharkov.ua/handle/KhPI-Press/25005.
Повний текст джерелаАнотація:
Дисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.18.05 – технологія цукристих речовин та продуктів бродіння. – Національний університет харчових технологій Міністерства освіти і науки, Київ, 2014. Дисертаційну роботу присвячено удосконаленню технології пива з використанням антиоксидантів з рослинної сировини. Розглянуто окиснення ізо-альфа-кислот при кип’ятінні сусла з хмелем або хмелепродуктами за ланцюговим вільнорадикальним механізмом. Визначено шляхи сповільнення окиснення в результаті додавання антиоксидантів з рослинної сировини. На основі вивчення кінетики окиснення компонентів хмельових смол озонованим повітрям розчинів СО₂-екстракту хмелю підібрано умови, що забезпечують прискорене окиснення компонентів хмельових смол. Доведено ефективність застосування антиоксидантів із рослинної сировини для захисту від окиснення компонентів хмельових смол. Встановлено найефективніші антиоксиданти та рекомендовану кількість їх внесення. Виявлено, що добавка АО із листя м'яти перцевої та кори дуба в сусло в процесі його кип'ятіння із хмелем найбільш ефективно сприяє коагуляції білків сусла й освітленню пива і дає можливість економити 10 % хмелю або його концентратів та збільшити фізіологічну цінність пива. Виявлено, що АО з трави звіробою та кори дуба впливають на вміст летких метаболітів окиснювального обміну, зокрема зменшують вміст діацетилу та ацетальдегіду в молодому та готовому пиві. Запропоновано технологію застосування антиоксидантів з рослинної сировини на стадіях кип’ятіння і охолодження сусла. Визначено технологічні режими внесення антиоксидантів з рослинної сировини і хмелепродуктів. Проведено виробничі випробування технології різних сортів пива з використанням рослинних антиоксидантів на заводі Харківського відділення ПАТ «CАН ІнБев Україна». Виготовлено дослідно-промислову партію об’ємом 10000 дал.The thesis for a scientific degree of candidate of technical sciences on specialty 05.18.05 – technology of sugary substances and fermentation products. – National University of Food Technologies, Ministry of Education and Science of Ukraine, Kуiv, 2014. The dissertation paper is devoted to the improvement of beer technology with the use of plant-extracted antioxidants. Iso-alpha acids oxidation by free-radical-chain mechanism during wort boiling with hop or hop products is discussed. The ways to inhibit the oxidation due to the addition of plant-extracted antioxidants are determined. Based on the analysis of kinetics of ozonized air oxidation of hop resins components in methanol CO₂ hop extract solution, the conditions are found that provide accelerated oxidation of hop resins components. The efficiency of application of plant-extracted antioxidants for anti-oxygenation of hop resins components is proved. The most effective antioxidants and their dosing rate have been determined. It is revealed that adding antioxidants extracted from peppermint leaves and oak bark into boiling wort with hop is most effective for wort proteins coagulation and beer clarification, this provides up to 10 % savings in hop or its extracts and increases the physiological value of the beer. It is found that antioxidants extracted from Hypericum and oak bark influence the contents of volatile metabolites of the oxidizing exchange; specifically they reduce the diacetyl and acetic aldehyde content in young and finished beer. The technology of plant-extracted antioxidants application at the stages of wort boiling and cooling is proposed. The conditions of plant-extracted antioxidants and hop products dozing are determined. Industrial tests of production technology for different beer types with the use of plant-extracted antioxidants were performed at the Kharkov branch of the PJSC «SUN InBev Ukraine». An experimental industrial batch of 10,000 dal was produced.
Частини книг з теми "Plant-extracted antioxidants"
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Vieito, Catarina, Preciosa Pires, and Manuela Vaz Velho. "Pinus Pinaster Bark Composition and Applications." In Novel Technologies and Systems for Food Preservation, 174–89. IGI Global, 2019. http://dx.doi.org/10.4018/978-1-5225-7894-9.ch008.
Повний текст джерелаАнотація:
The food market is demanding natural antioxidants either to be applied to food or cosmetic and nutraceutical purposes. Plants are very rich in polyphenols that have diverse biological functions, such as defending plants against microbiological attacks, becoming essential to plant life. The bark of Pinus pinaster Aiton subsp. atlantica is known to have a great amount of polyphenols with antioxidant and antimicrobial properties. P. pinaster has a large area of distribution in the northwest of Portugal, making this source a biomass feedstock of great interest for the food industry in Portugal. Therefore, embarking on the trend of circular economy, polyphenols are being extracted aiming for the exploitation of their antioxidant and antimicrobial properties as a food additive in a variety of food matrices. This chapter aims to provide a more insightful view of the chemical composition, extraction methods, and food applications of pine bark of Pinus pinaster Aiton subsp. atlantica polyphenols.
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Sharma, Tanya, Vinika Tyagi, and Megha Bansal. "Vegetable and Herbal Extracts: A Way towards Preventive and Therapeutics Regimen." In Vegetable Growing [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.101104.
Повний текст джерелаАнотація:
The traditional and herbal medicines play significant role in the treatment of several diseases. These medicines are the outcome of extensive research on therapeutic and preventive activity of various plant species and their specific parts. Administration of various plant parts, vegetables, fruits and other herbal constituents have significant impact on reduction of clinical, carcinogenic and genotoxic effects of various environmental toxicants. Various parts of plant such as wood, bark, stem, leaf and pod are rich in antioxidants which are known for their free radical scavenging activity. Currently, the treatment options rely significantly using natural anti-oxidants which are extracted from plant products because these are largely available, cost effective and non-toxic as compared to the synthetic drugs. Some potent natural anti-oxidants include tocopherol, ascorbic acid, flavonoids, quercetin, carotene, cinnamic acid, peptides and phenolic compounds which are extensively available in various herbal extracts. The present chapter will focus upon availability of various antioxidants in vegetables and other medicinal plants and their potential activities against xenobiotics.
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Usharani, Bhimavarapu. "House Plant Leaf Disease Detection and Classification Using Machine Learning." In Advances in Systems Analysis, Software Engineering, and High Performance Computing, 17–26. IGI Global, 2022. http://dx.doi.org/10.4018/978-1-7998-8161-2.ch002.
Повний текст джерелаАнотація:
Hibiscus is a fantastic herb, and in Ayurveda, it is one of the most renowned herbs that have extraordinary healing properties. Hibiscus is rich in vitamin C, flavonoids, amino acids, mucilage fiber, moisture content, and antioxidants. Hibiscus can help with weight loss, cancer treatment, bacterial infections, fever, high blood pressure, lower body temperature, treat heart and nerve diseases. Automatic leaf disease detection is an essential task. Image processing is one of the popular techniques for the plant leaf disease detection and categorization. In this chapter, the diseased leaf is identified by concurrent k-means clustering algorithm and then features are extracted. Finally, reweighted KNN linear classification algorithms have been used to detect the diseased leaves categories.
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"Antioxidant Compounds Extracted from Several Plant Materials." In Biomaterials from Aquatic and Terrestrial Organisms, 127–86. CRC Press, 2006. http://dx.doi.org/10.1201/9781482280470-6.
Повний текст джерелаТези доповідей конференцій з теми "Plant-extracted antioxidants"
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Mladenovic, Jelena, Veronika Markovic, Ljiljana Boskovic-Rakocevic, Milena Đuric, and Nenad Pavlovic. "ISPITIVANJE EKSTRAKATA ORIGANA DOBIJENIH RAZLIČITIM METODAMA." In XXVI savetovanje o biotehnologiji sa međunarodnim učešćem. University of Kragujevac, Faculty of Agronomy, 2021. http://dx.doi.org/10.46793/sbt26.407m.
Повний текст джерелаАнотація:
Oregano is used in the production of specific aromatic cheeses, meat products and dough dishes, for the production of medicinal preparations, fragrant soaps, colognes and perfumes. Special interest in oregano in recent years is related to the results of a study of its biological activities, which indicate a wide range of antibacterial, fungicidal, antiviral and antioxidant properties. The subject of this paper is the examination of extracts of plant species of oregano (Origanum vulgare), with the aim of determining the method that is most popular for extracting this plant species and which gives the best yields of extracts. The content of extracted substances in each extract, the content of vitamin C as well as the content of organic acids were determined.
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Tomenko, D., E. Aksenov, and Lyudmila Novikova. "PHENOLIC COMPOUNDS OF CONIFEROUS TREES." In Modern machines, equipment and IT solutions for industrial complex: theory and practice. FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov, 2021. http://dx.doi.org/10.34220/mmeitsic2021_351-356.
Повний текст джерелаАнотація:
The paper discusses the classification, structure and properties of natural phenolic compounds found in conifers wood species of Russia. The reasons for the variety of detected phenolic compounds (more than 2000) are considered, including the type and conditions of plant growth, environmental factors, as well as methods for extraction of substances. Coniferous extractives include monomeric, dimeric and polymeric phenolic compounds in bound and free form, and their content differs significantly for various species and parts of a woody plant. Depending on the polarity of the solvent used (water, petroleum ether, dimethyl ether, ethyl acetate, acetone, etc.), the yield, chemical composition and structure of the extracted phenolic compound change. It was shown that bark extracts of Larch and Fir contain the most phenolic acids and extractive substances than Pine, Cedar and Spruce, while the content of polar substances is higher in needles, and non- polar substances in plant shoots. Phenolic compounds are secondary plant metabolites, exhibiting fungicidal, virucidal and strong antioxidant effects, that make them a valuable basis for the creation of drugs.
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Berechet, Mariana Daniela, Demetra Simion, Maria Stanca, Cosmin Andrei Alexe, Rodica Roxana Constantinescu, Maria Rapa, and Andreea Turcanu. "Antibacterial and antioxidant activities of lemon balm (Melissa officinalis L.) essential oil." In The 8th International Conference on Advanced Materials and Systems. INCDTP - Leather and Footwear Research Institute (ICPI), Bucharest, Romania, 2020. http://dx.doi.org/10.24264/icams-2020.ii.2.
Повний текст джерелаАнотація:
Lemon balm (Melissa officinalis L.) belongs to the Lamiaceae family. Essential oil extracted from the aerial parts of lemon balm has been investigated for the protection of fruits during storage, as insecticidal, as well as in medicine, due to its bioactive properties. In this paper, the composition and identification of components from Melissa officinalis L. essential oil were determined by gas chromatography coupled with mass spectrophotometry (GC/MS) analysis. Total phenol content (TPC) and the scavenging activity towards 2,2-diphenyl-1-picrylhydrazyl (DPPH·) and 2,2′-azino-bis (3-ethylbenzthiazoline)-6-sulfonic acid (ABTS+·) free radicals were evaluated by UV-VIS spectrometry. Antibacterial activities were carried out against Staphylococcus aureus, Escherichia coli and Klebsiella pneumoniae. Seventeen bioactive compounds were found as constituents of Melissa officinalis L. essential oil, among which o-cymene (19.735%), dehydro-p-cymene (17.180%), and limonene (11.589%) were found as the major components. Attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FT-IR) provided a confirmation for the chemical components of lemon balm essential oil identified by GC/MS. The values recorded for TPC and antioxidant activity were as follows: 54.72 mg GAE/g dry substance, 28.53% for DPPH, and 46.17% for ABTS assays, respectively. 100 µL lemon balm essential oil proved total antibacterial activity against the tested microorganisms. The results showed that the Melissa officinalis L. may be a good candidate as plant-derived antioxidant and antibacterial agent for medical footwear, wound dressings and other medical applications.