scholarly journals COMPOSITION AND ANTIOXIDANT ACTIVITY OF ONION ANGULAR (ALLIUM ANGULOSUM L.), GROWING IN THE BAIKAL REGION

2020 ◽  
pp. 81-89
Author(s):  
Bayana Anatol'yevna Bazhenova ◽  
Raisa Alexandrovna Yegorova ◽  
Yulia Yurievna Zabaluyeva ◽  
Anastasia Galimzyanovna Burkhanova
Keyword(s):  
Chemical Composition ◽  
Baikal Region ◽  
Antioxidant Properties ◽  
Total Content ◽  
Biologically Active ◽  
Leaf Extracts ◽  
Carbon And Nitrogen ◽  
Irkutsk Region ◽  
The Republic ◽  
Pork Fat

The article presents data on the chemical composition and antioxidant properties of the organs of onion angular (Allium angulosum L.), growing in the Irkutsk region and the Republic of Buryatia. Allium angulosum L. has in its composition biologically active compounds, including those with antioxidant properties, which indicates a high potential and prospects for the use of this plant for food purposes. The aim of the work was to assess the chemical composition and total content of antioxidants in dried samples of leaves and stems of onion angular (Allium angulosum L.), growing in different conditions of the Baikal region. The study of carbon and nitrogen in different plant organs revealed that the carbon content is higher in stems, nitrogen in the leaves in all samples of onion angular, grown in different conditions. It is noted that in the organs of Allium angulosum L., growing on typical cold black earth, the content of the studied elements is higher in comparison with their content in other experimental samples. It was revealed that the stems and leaves of angular onions accumulate in their composition trace elements K, Na, Li, Mg, Ca. The study of the total content of antioxidants indicated that leaf extracts have in their composition more antioxidants than stems, regardless of the place of growth. The high content of antioxidants in Allium angulosum L. provides inhibition of oxidative processes in the storage of pork fat, which introduced crushed dried leaves of Allium angulosum L.

scholarly journals COMPARATIVE EVALUATION OF ANTIOXIDANT ACTIVITY OF EXTRACTS OF BERGENIA CRASSIFOLIA (L.) FITSCH LEAVES OF DIFFERENT TERMS OF VEGETATION

2020 ◽  
pp. 231-239
Author(s):  
Svetlana Vladimirovna Tsyrendorzhieva ◽  
Sesegma Dashiyevna Zhamsaranova
Keyword(s):  
Raw Materials ◽  
Antioxidant Properties ◽  
Total Content ◽  
Leaf Extracts ◽  
Green Leaves ◽  
Chelating Ability ◽  
The Republic ◽  
Bergenia Crassifolia ◽  
Maximum Content

New data on the chemical composition and antioxidant properties of aqueous leaf extracts of Bergenia crassifolia (L.) Fitsch of different periods of vegetation growing in the Republic of Buryatia were obtained. It is shown that this is one of the few plants whose leaves contain a significant amount of phenolic compounds. The maximum content of tannins was noted in the extract of red leaves of the incense – 2.42%. Depending on the phase of the collection of raw materials, the content of flavonoids in the water extracts of the leaves of the frangipani varied from 3.88 to 5.42%. A higher accumulation of flavonoids was observed in the extract of black leaves of badan, which is apparently associated with leaf fermentation, in which the cellular structure is destroyed, enzymes and polyphenols are released. The leader in determining the total content of anthocyanins, as well as for flavonoids, was the extract of black leaves of frankincense. The largest amount of arbutin was contained in the extract of green leaves of frankincense – 1.22%. The studied extracts had a high ability to absorb free radicals, however, the extract of green leaves of badan had the highest antiradical activity, had a minimum EC50 of 4 mg/cm3. The iron-chelating ability of the tested aqueous extracts of frankincense leaves of different periods of in vitro vegetation showed that the leaf extracts had weak iron-chelating activity.

Chemical Composition and Antimicrobial Activity of Bark and Leaf Extracts of Cupressus sempervirens and Juniperus phoenicea Grown in Al- Jabel Al-Akhdar Region, Libya

2019 ◽  
Vol 9 (4) ◽  
pp. 268-279
Author(s):  
Mohamed E.I. Badawy ◽  
Ibrahim E.A. Kherallah ◽  
Ahmed S.O. Mohareb ◽  
Mohamed. Z.M. Salem ◽  
Hameda A. Yousef
Keyword(s):  
Antimicrobial Activity ◽  
Chemical Composition ◽  
Sea Level ◽  
Plant Extracts ◽  
Complex Mixture ◽  
Biologically Active ◽  
Cupressus Sempervirens ◽  
Leaf Extracts ◽  
Juniperus Phoenicea ◽  
The Impact

Background:Plant extracts are important products in the world and have been widely used for isolation of important biologically active products. Because of their significant environmental impact, extensive research has been explored to determine the antimicrobial activity of plant extracts.Methods:Acetone extracts of the bark and leaf of Cupressus sempervirens and Juniperus phoenicea, collected from three different altitudes (125, 391, and 851 m high of sea level) at Al- Jabel Al-Akhdar area, Libya were obtained and analyzed by GC/MS. The antimicrobial activity of the extracts was further evaluated against plant bacteria Rhizobium radiobacter, Erwinia carotovora, Rhodococcus fascians and Ralstonia solanacearum and fungus Botrytis cinerea.Results:The impact of the altitude from the sea level on the quantity and chemical constituents of the extracts was investigated. The yield was largely dependent on tree species and the highest yield (6.50%) was obtained with C. sempervirens L bark of altitude III (851 m of the sea level), while the lowest (1.17%) was obtained with the leaf extract of C. sempervirens L from altitude I (125 m). The chemical composition analyzed by GC/MS confirmed that the leaf extracts of C. sempervirens and J. phoenicea contained a complex mixture of monoterpene hydrocarbons, sesquiterpenes, diterpenes, diterpenoids, terpenophenolic, steroids and phthalates. However, the bark extracts of both trees contained a mixture of sesquiterpenes, diterpenes, diterpenoids, terpenophenolics, phthalates, retinol and steroids. These constituents revealed some variability among the extracts displaying the highest interesting chemotype of totarol (terpenophenolic) in all extracts (14.63-78.19% of the total extract). The extracts displayed a noteworthy antifungal potency with varying degrees of inhibition of growth with EC50 values ranged from 78.50 to 206.90 mg/L. The extracts obtained from the leaves of C. sempervirens showed that the highest inhibitory activity was obtained with the extract of altitude II (391 m) with MIC 565, 510, 380 and 710 mg/L against E. carotovora, R. fascians, and R. radiobacter and R. solanacearum, respectively.Conclusion:Based on antimicrobial activity, raw plant extracts can be a cost-effective way to protect crops from microbial pathogens. Because plant extracts contain several antimicrobial compounds, the development of resistant pathogens can be delayed.

scholarly journals Evaluation of Antioxidative Mechanisms In Vitro and Triterpenes Composition of Extracts from Silver Birch (Betula pendula Roth) and Black Birch (Betula obscura Kotula) Barks by FT-IR and HPLC-PDA

Molecules ◽  
2021 ◽  
Vol 26 (15) ◽  
pp. 4633
Author(s):  
Aleksandra Ostapiuk ◽  
Łukasz Kurach ◽  
Maciej Strzemski ◽  
Jacek Kurzepa ◽  
Anna Hordyjewska
Keyword(s):  
Chemical Composition ◽  
Betula Pendula ◽  
Antioxidant Properties ◽  
Silver Birch ◽  
Biologically Active Substances ◽  
Biologically Active ◽  
Outer Bark ◽  
Betula Pendula Roth ◽  
Production Of Hydrogen ◽  
Active Substances

Silver birch, Betula pendula Roth, is one of the most common trees in Europe. Due to its content of many biologically active substances, it has long been used in medicine and cosmetics, unlike the rare black birch, Betula obscura Kotula. The aim of the study was therefore to compare the antioxidant properties of extracts from the inner and outer bark layers of both birch trees towards the L929 line treated with acetaldehyde. Based on the lactate dehydrogenase test and the MTT test, 10 and 25% concentrations of extracts were selected for the antioxidant evaluation. All extracts at tested concentrations reduced the production of hydrogen peroxide, superoxide anion radical, and 25% extract decreased malonic aldehyde formation in acetaldehyde-treated cells. The chemical composition of bark extracts was accessed by IR and HPLC-PDA methods and surprisingly, revealed a high content of betulin and lupeol in the inner bark extract of B. obscura. Furthermore, IR analysis revealed differences in the chemical composition of the outer bark between black and silver birch extracts, indicating that black birch may be a valuable source of numerous biologically active substances. Further experiments are required to evaluate their potential against neuroinflammation, cancer, viral infections, as well as their usefulness in cosmetology.

scholarly journals Antioxidant Activity and Chemical Composition of Extracts from Fruiting Bodies of Xylotrophic Fungi Growing on Birch

2001 ◽  
Vol 14 (3) ◽  
pp. 339-353
Author(s):  
Alexander A. Ermoshin ◽  
◽  
Irina S. Kiseleva ◽  
Irina V. Nikkonen ◽  
Dominique S. Nsengiyumva ◽  
...  
Keyword(s):  
Amino Acids ◽  
Antioxidant Activity ◽  
Chemical Composition ◽  
Antioxidant Properties ◽  
Biologically Active ◽  
Future Research ◽  
No Production ◽  
Fruiting Bodies ◽  
Fomitopsis Pinicola ◽  
Xylotrophic Basidiomycetes

The search for new natural sources of biologically active substances is a major issue in pharmaceutical industry. Xylotrophic basidiomycetes are common in forests worldwide, but as a prospective raw source of biologically active compounds they have not been studied as extensively as plants and other groups of fungi. The study is aimed to determine the chemical composition and antioxidant activity of extracts from 10 species of tinder fungi growing on birch and common in the forests in Russia. The chaga muchroom (Inonotus obliquus), traditionally used in medicine, was chosen as a standard species. Extracts from fruiting bodies were obtained with water or 95 % ethanol. They contained 4 to 8 types of free amino acids including 2 to 6 essential ones. Perennial basidiocarps were shown to be richer in phenolic compounds and poorer in amino acids than annual ones. Alkaloids and saponins were found in perennial basidiocarps of two species, saponins were also found in annual basidiocarps of one species. Water and alcohol extracts differed in composition and concentration of extractives, and showed different antioxidant (inhibition of lipid peroxidation) and antiradical (ABTS‑test, inhibition of NO production) activity. This way it was shown that the nature of the solvent extraction agent is important for the manifestation of biological activity. In most tests, water extracts from chaga showed better antioxidant properties; extracts from Piptoporus betulinus and Fomitopsis pinicola were also effective as antioxidants, which may be promising avenues for future research

scholarly journals PHYTOCHEMICAL ANALYSIS AND ANTIOXIDANT PROPERTIES OF LEAF EXTRACTS OF CARICA PAPAYA

2020 ◽  
pp. 58-62
Author(s):  
NANDINI G ◽  
GOPENATH TS ◽  
NAGALAMBIKA PRASAD ◽  
MURUGESAN KARTHIKEYAN ◽  
ASHOK GNANASEKARAN ◽  
...  
Keyword(s):  
Carica Papaya ◽  
Antioxidant Properties ◽  
Bioactive Compound ◽  
Biologically Active ◽  
Total Phenolic ◽  
Phytochemical Analysis ◽  
Leaf Extracts ◽  
Isolation And Purification ◽  
Chain Reactions ◽  
Methanolic Extracts

Objective: The objective of the present study aimed at investigating the phytochemical and antioxidant properties of Carica papaya leaf extracts. Methods: As phytochemicals are biologically active compounds and a powerful group of plant chemicals, believed to stimulate the immune system along with antioxidants, the molecules which hinder oxidation of other molecules by the process of inhibiting or by generating the oxidizing chain reactions and preventing diseases. The total phenolic content (TPC) was determined by Folin-Ciocalteu method and total flavonoid contents (TFC) were determined aluminum chloride method and antioxidant by 2,2,1-diphenyl-1-picrylhydrazyl method. Results: The results of phytochemical screening revealed the presence of bioactive compounds such as alkaloid, carbohydrates, and amino acids and TPC and TFC varied among the different solvent extracts, in which methanolic extracts showed highest amount of phytochemicals and TPC and TFC and antioxidants compared to other solvents. Conclusion: The isolation and purification of specific bioactive compound may account as natural and promising medicines in exploration of new drug.

scholarly journals CHEMICAL COMPOSITION AND ANTIOXIDANT ACTIVITY OF MEDICINAL EXTRACTS (SAPONARIA OF-FICINALIS L.)

2017 ◽  
pp. 137-143 ◽  
Author(s):  
Галина (Galina) Батоевна (Batoevna) Ендонова (Endonova) ◽  
Татьяна (Tat'jana) Петровна (Petrovna) Анцупова (Ancupova) ◽  
Сысыгма (Sysygma) Дашиевна (Dashievna) Жамсаранова (Zhamsaranova)
Keyword(s):  
Antioxidant Activity ◽  
Chemical Composition ◽  
Antioxidant Properties ◽  
Aqueous Extracts ◽  
Total Antioxidant Activity ◽  
Chelating Activity ◽  
Total Antioxidant ◽  
The Republic ◽  
The Village ◽  
Saponaria Officinalis

The paper presents new data on chemical composition and antioxidant properties in extracts of the aerial organs of Saponaria officinalis growing on the territory of the Republic of Buryatia. It was revealed that soapberry leaves extracts contain a number of organic acids such as oxalic, formic, fumaric, succinic, malic, citric, and benzoic ones, the dominant being formic, malic, acetic and citric acids. Of vitamins B2, B3. BC extracted from the plant the dominant one was riboflavin. The method of and Fthigh-performance liquid chromatography helped to reveal five compounds identified as aglycone and glycosidic in character. They are orientin, isoeryentin, isovitinexin-7-О-glycoside, orientin-7-О-glycoside, of which isovitoxin is dominant. The greatest total antioxidant activity was demonstrated by soapberry leaves and inflorescences picked up on abandoned sites of the village of Selenginsk. Extractions from Saponaria officinalis leaves showed showed antiradical and Fe2+-chelating activity comparable to that of the extractions from plants with pronounced antioxidant activity. Thus, the data obtained indicated the antioxidant activity of S.officinalis aqueous extracts due to the presence of natural flavonoids. This fact shows the plant as a promising new source of antioxidants.

scholarly journals Problems of the Buryat society of the late XIX – early XX centuries (based on archival materials of the Republic of Buryatia and Irkutsk Region)

2021 ◽  
pp. 32-45
Author(s):  
Larisa Khingeeva
Keyword(s):  
Elementary Education ◽  
Baikal Region ◽  
Social Problems ◽  
Medical Personnel ◽  
Academic Science ◽  
State Archive ◽  
Moral Standards ◽  
Irkutsk Region ◽  
Basic Sanitation ◽  
The Republic

In the late XIX – early XX centuries, the Buryat people were struggling to survive due to numerous social problems that had accumulated over time. The absence of basic sanitation, low cultural level and moral standards, widespread alcoholism led to mass infectious diseases and issues in reproductive health. The established menacing situation is described by the researchers, medical personnel, and representatives of the European academic science, who worked in the Baikal Region at that time. The goal of this article consists in giving an outlook on the situation from the perspective of Buryat society. The research employs the analysis of previously unpublished materials stored in the State Archive of the Republic of Buryatia and State Archive of the Irkutsk Region. This article is first to publish the notes of the little-known Buryat researcher Mangutkhan Malasagaev. He lived his entire life in the Baikal Region, was engaged in the traditional peasant activities, and thus can be considered a true representative of the Buryat people. His elementary education and lively analytical mind allowed him keeping records of his own observations, and thus leaving a range of manuscripts that describe and analyze various aspects of life of the Buryat people. The article presents his observations on social problems of the Buryat society.

scholarly journals Influence of the processing method on the chemical composition and antioxidant activity of raspberries

2021 ◽  
pp. 388-392
Author(s):  
И.А. Громова ◽  
М.С. Воронина ◽  
Н.В. Макарова
Keyword(s):  
Antioxidant Activity ◽  
Chemical Composition ◽  
Antioxidant Properties ◽  
Great Influence ◽  
Water Extract ◽  
Total Content ◽  
Waste Products ◽  
Fresh Frozen ◽  
Ethanol Extracts

Большое влияние на здоровье человека оказывают вещества, проявляющие антиоксидантный эффект, в значительной степени содержащиеся в ягодах малины и отходах сокового производства от данной ягоды, а именно свежезамороженной ягоде, свежевыжатом соке, водной вытяжке, сырых и высушенных выжимках и концентрированном соке. Целью работы стало изучение химического состава и антиоксидантной активности ягод малины и отходов сокового производства, наблюдение за изменением показателей исследуемых характеристик при механической и тепловой обработке ягод малины и выбор оптимального варианта. При проведении исследований были использованы следующие методы: определение общего содержания антоцианов; определение общего содержания фенольных соединений; определение общего содержания флавоноидов; определение антирадикальной активности; определение восстанавливающей силы; исследование антиоксидантных свойств с использованием модельной системы линолевой кислоты. Все методы по определению содержания антиоксидантов проводились на этанольных экстрактах. Установлено, что использование экстракции для ягод и отходов сокового производства позволяет более точно определить содержание исследуемых показателей. Выявлено, что наибольшая антиоксидантная активность 94,5-98,4 % отмечена в малине и водной вытяжке из нее. A great influence on human health is exerted by substances exhibiting an antioxidant effect, largely contained in raspberries and their juice waste products, specifically in fresh-frozen berries, fresh squeezed juice, water extract, raw and dried pomace and concentrated juice. The aim of the work was to study chemical composition and antioxidant activity of raspberries and their juice waste products, monitor changes in the parameters of the studied characteristics during mechanical and thermal processing of raspberries and select the optimal option. The following methods were used during the research: determination of the total content of anthocyanins; determination of the total content of phenolic compounds; determination of the total content of flavonoids; determination of antiradical activity; determination of regenerating power; study of antioxidant properties using a model system of linoleic acid. All methods for determining the content of antioxidants were carried out on ethanol extracts. It was established that using of extraction for berries and juice waste products made it possible to determine more precisely the content of the studied indicators. It was also revealed that the highest antioxidant activity of 94.5% - 98.4% was observed in raspberries and their water extract.

scholarly journals Humus conditions of stands with different proportion of Douglas fir in the Hůrky Training Forest District and Křtiny Training Forest Enterprise

2009 ◽  
Vol 55 (No. 8) ◽  
pp. 345-356 ◽  
Author(s):  
L. Menšík ◽  
J. Kulhavý ◽  
P. Kantor ◽  
M. Remeš
Keyword(s):  
Chemical Composition ◽  
Acid Site ◽  
Forest Floor ◽  
Total Content ◽  
Acid Sites ◽  
Douglas Fir ◽  
Soil Reaction ◽  
Carbon And Nitrogen ◽  
Beech Stand ◽  
Forest District

The paper presented evaluates reserves and chemical composition of forest floor of three stands of Douglas fir, spruce and spruce with beech at acid sites (3K) in the Hůrky Training Forest District (TFD) and at a meso-trophic site (4H) in the Křtiny Training Forest Enterprise (TFE). The aim of the study was to evaluate: (<I>i</I>) reserves of forest floor, (<I>ii</I>) soil reaction, (<I>iii</I>) total content of carbon and nitrogen for the forest floor layers, <I>iv</I>) C/N ratio, and (<I>v</I>) the content of dissolved organic carbon (DOC). The lowest reserve occurs in the Douglas fir stand at a mesotrophic site (25.0 t/ha), the highest accumulation occurs in the spruce stand and in the spruce/beech stand at an acid site (79.4–79.6 t/ha). The soil reaction is strongly acid to acid. The most favourable values of pH for forest floor and soil at acid (4.6 ± 0.4) and mesotrophic sites (5.2 ± 0.4) occur in the Douglas fir stand. It also corresponds to C/N ratio (23–26). The highest reserve of carbon in forest floor occurs at the acid site 34.7 t/ha (1.3 t/ha nitrogen). The lowest reserve of carbon in forest floor at the mesotrophic site amounts to 8.5 t/ha (0.4 t/ha nitrogen). The higher content of DOC in stands at acid sites can result in a higher risk of soil acidification. Keywords: spe

scholarly journals Bioactive Compounds in Aegopodium podagraria Leaf Extracts and Their Effects against Fluoride-Modulated Oxidative Stress in the THP-1 Cell Line

2021 ◽  
Vol 14 (12) ◽  
pp. 1334
Author(s):  
Karolina Jakubczyk ◽  
Agnieszka Łukomska ◽  
Sylwester Czaplicki ◽  
Anna Wajs-Bonikowska ◽  
Izabela Gutowska ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Antioxidant Enzymes ◽  
Essential Oil ◽  
Cell Line ◽  
Antioxidant Properties ◽  
Total Content ◽  
Antioxidant Potential ◽  
Leaf Extracts ◽  
Positive Effects

Aegopodium podagraria L. (goutweed), a member of the Apiaceae family, is a common perennial plant found all around the world that has been used in folk medicine since antiquity. Goutweed leaves contain polyacetylenes, essential oils, mono- and sesquiterpenes, vitamins, macro- and microelements, and phenolic compounds. In spite of its many health-promoting properties, including antioxidant effects, the plant has not been thoroughly studied. The aim of this study was to investigate the antioxidant properties of different goutweed leaf extracts and their effects on the THP-1 cell line, and also to describe the chemical characteristics of goutweed. Falcarinol and falcarindiol and essential oil were determined by gas chromatography coupled with mass spectrometry. Spectrophotometry was used to measure the total content of polyphenols and antioxidant activity–by DPPH and FRAP methods. Oxidative stress in THP-1 cells was induced via sodium fluoride. Then, goutweed leaf extracts were added to evaluate their influence on antioxidant potential (ABTS) and the activity of antioxidant enzymes. Confocal microscopy was used to visualise the production of cytoplasmic and mitochondrial reactive oxygen species (ROS) and for in vitro imaging of apoptosis. The ethanol extracts have a high total content of polyphenols, polyacetylenes, and essential oil, as well as high antioxidant potential. The main volatiles represented diverse chemical groups, which are both oxygenated derivatives of sesquiterpenes and monoterpenes. We also demonstrated positive effects of the high antioxidant potential and increased activity of antioxidant enzymes on cell cultures under severe fluoride-induced oxidative stress. Extraction at 80 ℃ and the use of ethanol as a solvent increased the antioxidant capacity of the extract. The leaves of Aegopodium podagraria may serve as a valuable source of antioxidants in the daily diet and assist in the prevention and treatment of oxidative stress-mediated conditions, e.g., inflammatory conditions, cardiovascular diseases, neurodegenerative diseases, and even obesity.

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