A rapid method for determining SiO2 in glass

Максимова, О.С.; Rozhkina, G. D.

doi:10.1007/bf00680344

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“…The amount of antioxidant substances was determined by the following formula: in the case of the isopropanol extract: The antioxidant activity assessment method allows screening medicinal plant raw materials, phytopreparation and dietary supplements with high antioxidant activity (AOA) dependent on phenols, flavanoids, tanins, etc. [24]. The presence of antioxidant activity in extracts can be explained by the fact that the investigated extracts contained multifunctional BAS together with easily oxidized functional groups (for example, -SH, (CH3)2CH-), that relatively faster bind free radicals formed in living organisms.…”

Section: Uv Spectrum Of Diethyl Ether Extractmentioning

confidence: 99%

Study of the Chemical Composition, Antibacterial and Antioxidant Activity of Various Extracts of the Aerial Part of Leonurus Cardiaca

STEPANYAN

2023

FARMACIA

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The effect of various solvents (hexane, diethyl ether, ethyl acetate, isopropyl alcohol) on extraction of phytocomponents of Leonurus cardiaca leaf was studied a long with the antioxidant and antibacterial activity of the obtained extracts. The chemical composition of the obtained extracts was studied by the chemical and spectrophotometric methods. The results showed the presence of various phytocompounds in the extracts. It was found that the non-polar solvent hexane extracted a large amount of esters compared to all selected solvents. It was also established that the most polar solvent, isopropanol, extracted large amounts of fatty acids. More extractives (8.5% yield) were extracted with isopropanol and this extract contained the highest amounts of phenolic compounds (68.8 mg GAE/g) and flavonoids (22.7 mg RE/g). The analysis of the antioxidant activity showed that the isopropanol extract had the best result. The antibacterial analysis showed that all investigated conditionally pathogenic bacteria (E. Coli, B. subtilis and Salmonella tуphimurium) were sensitive to all extracts. RezumatPrezentul studiu a evaluat efectul unor solvenți (hexan, dietil eter, acetat de etil, alcool izopropilic) asupra procesului de extracție al fitocomponentelor din frunzele de Leonurus cardiaca, precum și activitățile antioxidantă și antibacteriană ale extractelor obținute. Compoziția chimică a acestora a fost studiată prin metode chimice și spectrofotometrice. S-a observat că hexanul a extras o cantitate mare de esteri în comparație cu restul solvenților. S-a stabilit, de asemenea, că solventul cel mai polar, izopropanolul, extrage cantități mari de acizi grași. Analiza activității antioxidante a arătat că extractul izopropanolic a avut cel mai bun rezultat. Analiza antibacteriană a arătat că toate bacteriile patogene condiționat investigate (E. coli, B. subtilis și Salmonella tуphimurium) au fost sensibile la toate extractele.

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Section: Uv Spectrum Of Diethyl Ether Extractmentioning

confidence: 99%

Study of the Chemical Composition, Antibacterial and Antioxidant Activity of Various Extracts of the Aerial Part of Leonurus Cardiaca

STEPANYAN

2023

FARMACIA

View full text Add to dashboard Cite

show abstract

A rapid method for determining SiO2 in glass

Cited by 1 publication

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Study of the Chemical Composition, Antibacterial and Antioxidant Activity of Various Extracts of the Aerial Part of Leonurus Cardiaca

Study of the Chemical Composition, Antibacterial and Antioxidant Activity of Various Extracts of the Aerial Part of Leonurus Cardiaca

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