scholarly journals Antioxidant Activity and Chemical Composition of Methanolic Extract from Arum Dioscoridis Sm. var. Dioscoridis and Determination of Mineral and Trace Elements

2017 ◽  
pp. 205-218 ◽  
Author(s):  
Erdal YABALAK
Keyword(s):  
Antioxidant Activity ◽  
Trace Elements ◽  
Chemical Composition ◽  
Methanolic Extract

scholarly journals Eugenia Klotzschiana O. Berg Fruits as New Sources of Nutrients: Determination of their Bioactive Compounds, Antioxidant Activity and Chemical Composition

2019 ◽  
Vol 62 ◽  
Author(s):  
Nárgella Silva Carneiro ◽  
Cássia Cristina Fernandes Alves ◽  
Caroline Cagnin ◽  
Celso Martins Belisario ◽  
Marco Antônio Pereira da Silva ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Chemical Composition ◽  
Bioactive Compounds

Comparative study of the ethanol extracts of six Acinos Miller species: chemical composition, antimicrobial and antioxidative activities

2020 ◽  
Vol 48 (1) ◽  
pp. 53-65
Author(s):  
Tatjana D. GOLUBOVIĆ ◽  
Gordana S. STOJANOVIĆ ◽  
Dušanka V. KITIĆ ◽  
Bojan K. ZLATKOVIĆ ◽  
Dragana R. PAVLOVIĆ ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Chemical Composition ◽  
Salmonella Enteritidis ◽  
Ethanol Extract ◽  
Antimicrobial Activities ◽  
Diffusion Method ◽  
Disk Diffusion Method ◽  
Fungal Organisms ◽  
Ethanol Extracts

The ethanol extracts of selected Acinos Miller species were investigated in terms of chemical composition, antimicrobial and antioxidative activities. Qualitative and quantitative analyses of the extracts were performed using GC and GC-MS. Eighty-six constituents, accounting for 93.70-99.99% of the total composition of the extracts, were identified. The ethanol extracts of A. majoranifolius, A. suaveolens and A. alpinus were characterized by domination of monoterpenes, representing 85.03%, 57.39% and 28.02% of the total extracts, respectively. Fatty acids and their esters in the A. arvensis and A. graveolens extracts reached 28.97% and 30.75%. Also, n-alkanes were the major compounds found in A. hungaricus ethanol extract (30.98%). The extracts were characterized by determination of total polyphenols, flavonoids and tannins. Besides, the antioxidant activity of the investigated extracts was estimated by two assays: DPPH and FRAP test. The highest antioxidant activity was observed in the extract of A. alpinus which had high levels of all examined polyphenol classes. A disk diffusion method was employed for the determination of the antimicrobial activities of the ethanol extracts. Gram-positive: Bacillus subtilis, Sarcina lutea, Staphylococcus aureus, Clostridium pyogenes, Enterococcus sp., Micrococcus flavus; Gram-negative: Klebsiella pneumoniae, Pseudomonas aerugionsa, Salmonella enteritidis, Proteus vulgaris, Escherichia coli and fungal organisms: Aspergillus niger, Candida albicans and Saccharomyces cerevisiae were used as test microorganisms. The results of preliminary bioassay demonstrated that the A. alpinus ethanol extract could be a possible source of compounds with antioxidant and antimicrobial activity.

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 Chemical Composition and Antioxidant Activity of Cirsium vulgare Inflorescences

2017 ◽  
Vol 12 (4) ◽  
pp. 1934578X1701200 ◽  
Author(s):  
Jolanta Nazaruk ◽  
Sebastian Chłędzik ◽  
Jakub Strawa ◽  
Katarzyna Bazydło ◽  
Anna Wajs-Bonikowska
Keyword(s):  
Antioxidant Activity ◽  
Chemical Composition ◽  
Plant Material ◽  
Methanolic Extract ◽  
Total Flavonoid Content ◽  
Flavonoid Content ◽  
Chromatographic Separations ◽  
Cirsium Vulgare ◽  
First Time ◽  
Derivatives Of

The chemical composition of Cirsium vulgare flower heads was examined. Petrol and chloroform extracts of this plant material were analyzed by GC-MS for the presence of fatty acids, phytosterols, and triterpenes. Diethyl ether, ethyl acetate, and butanol fractions of the methanolic extract were subjected to multistep chromatographic separations, and as a result, fourteen flavonoids were obtained (1–14). All compounds were isolated from this morphological part for the first time and eleven from the plant. Among the identified components were four aglycones, eight glycosides, and two glycoside esters, derivatives of apigenin, luteolin, kaemferol, and quercetin. One of them was a rarely occurring compound apigenin 7- O-β-(6″-butyl)-glucuronide) (14). Total flavonoid content and antioxidant activity were determined in the various fractions of methanolic extract.

scholarly journals Chemical Composition and Antioxidant Activity of the Ceratonia Siliqua L. Seeds Oil

2021 ◽  
Author(s):  
Said Abbout ◽  
Driss CHEBABE ◽  
Malak REHIOUI ◽  
Hamid ERRAMLI ◽  
Najat HAJJAJI
Keyword(s):  
Fatty Acids ◽  
Antioxidant Activity ◽  
Chemical Composition ◽  
Organic Compounds ◽  
Ceratonia Siliqua ◽  
Ceratonia Siliqua L

Abstract In this work, we are interested in the antioxidant activity of Ceratonia Siliqua L. seeds oil. After extraction of seeds oil by Soxhlet, we characterized by GC-MS and evaluated the antioxidant activity by DPPH• and ABTS+•. The obtained results show that the seeds oil of Ceratonia Siliqua L. contains various organic compounds, the majority of which are fatty acids. Furthermore, the determination of IC50 by the DPPH• and ABTS+• methods show that cyclohexane has good IC50 compared to hexane.

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