Biomolecular Characterization of Wild Sicilian Oregano: Phytochemical Screening of Essential Oils and Extracts, and Evaluation of Their Antioxidant Activities

2013 ◽  
Vol 10 (3) ◽  
pp. 411-433 ◽  
Author(s):  
Teresa Tuttolomondo ◽  
Salvatore La Bella ◽  
Mario Licata ◽  
Giuseppe Virga ◽  
Claudio Leto ◽  
...  
Keyword(s):  
Essential Oils ◽  
Antioxidant Activities ◽  
Phytochemical Screening

scholarly journals Phytochemical Screening of Essential Oils and Antibacterial Activity and Antioxidant Properties of Barringtonia asiatica (L) Leaf Extract

2019 ◽  
Vol 2019 ◽  
pp. 1-6 ◽  
Author(s):  
Isaac John Umaru ◽  
Fasihuddin A. Badruddin ◽  
Hauwa A. Umaru
Keyword(s):  
Antibacterial Activity ◽  
Essential Oil ◽  
Essential Oils ◽  
Crude Extract ◽  
Antioxidant Activities ◽  
Antioxidant Properties ◽  
Positive Control ◽  
Phytochemical Screening ◽  
Bacterial Strains ◽  
Agar Disc

Objective. To ascertain the essential oil phytochemicals of the leaf and to test for the antibacterial and antioxidant properties of dichloromethane crude extract of Barringtonia asiatica leaf. Methods. The phytochemical screening of essential oils, extraction by hydrodistillation using the Clevenger apparatus, and analysis performed by gas chromatography equipped with a flame ionization detector (GC-FID). Antibacterial activity and the inhibition rate (mm) were determined using the agar disc method against four bacterial strains using tetracycline as positive control. The antioxidant potential of dichloromethane crude extract was investigated spectrophotometrically using 1,1-diphenyl-2-picrylhydrazyl. Results. The essential oil properties were reasonable with major phytochemicals like uncineol 30.9%, eicosane 27.4%, eicosane 21.6%, and 4-propyl-guaiacol 14.05%. The antibacterial activity of the dichloromethane crude extract showed broad-spectrum activity against Salmonella typhi, Escherichia coli, Staphylococcus aureus, and Klebsiella pneumoniae with inhibition value ranges between 2.50 ± 0.10 mm and 5.00 ± 0.06 mm. The dichloromethane crude extract exhibited strong antioxidant activities when compared to the standard. Conclusions. These results suggest that the leaves of Barringtonia asiatica is composed of essential compound as well as antibacterial and antioxidant properties from the crude extract; these are possible due to the presence of some bioactive compounds in the crude extract. The species also showed a reasonable amount of natural products in the essential oils from the hydrodistillation which can as well be used in the cosmetics and food industries.

scholarly journals Untargeted Metabolomics of Rind Essential Oils Allowed to Differentiate Two Closely Related Clementine Varieties

Plants ◽  
2021 ◽  
Vol 10 (9) ◽  
pp. 1789
Author(s):  
María del Carmen González-Mas ◽  
José L. Rambla ◽  
Aurelio Gómez-Cadenas ◽  
María Amparo Blázquez ◽  
María Pilar López-Gresa ◽  
...  
Keyword(s):  
Essential Oils ◽  
Antioxidant Activities ◽  
Citrus Fruit ◽  
Chemical Characterization ◽  
Food Preservation ◽  
Untargeted Metabolomics ◽  
Variety Identification ◽  
Volatile Profiles ◽  
Citrus Varieties

Chemical characterization of clementine varieties (Citrus clementina Hort. ex Tan.) essential oils (EO) can lead to variety identification and valorization of their potential use in food and aroma industries. The goal of this study was the chemometric discrimination between two very closely related and morphologically identical clementine varieties, Clemenules (NL) and Clemenpons (PO), based on their rind EO, to identify the differential volatile organic compounds (VOCs) and to determine their antioxidant capacity. EO rind volatile profile was determined by gas chromatography coupled to mass spectrometry in Citrus fruit at different ripening stages grown two independent years in two different locations. Untargeted metabolomics and multivariate data analysis showed an evolution of EO volatile profiles markedly parallel in both varieties. Although EO qualitative composition was identical in both varieties, PLS-DA allowed the identification of characteristic VOCs, quantitatively discriminating them along all the ripening process. PO showed higher accumulation of several mono- and sesquiterpene compounds such as trans-carveol, while NL showed higher levels of aldehyde and alcohol non-terpenoids like dodecanal. Both varieties evinced identical EO antioxidant activities, indicating a similar value for food preservation. Hence, untargeted metabolomics approach based on rind EO volatiles was revealed as a powerful technique able to differentiate between morphologically undistinguishable Citrus varieties.

Characterization of white cabbages from different cultivations by isothiocyanates and antioxidant activities

Planta Medica ◽  
2008 ◽  
Vol 74 (09) ◽  
Author(s):  
A Śmiechowska ◽  
B Kusznierewicz ◽  
A Bartoszek ◽  
A Szumska ◽  
A Kawecka ◽  
...  
Keyword(s):  
Antioxidant Activities

Composition of essential oil and antioxidant activity of Khat (Catha edulis Forsk), Ethiopia

2019 ◽  
Author(s):  
Chem Int
Keyword(s):  
Gas Chromatography ◽  
Essential Oils ◽  
Antioxidant Activities ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Free Radical Scavenging ◽  
Gas Chromatography Mass Spectrometry ◽  
Bahir Dar ◽  
Dpph Radical ◽  
Catha Edulis

In this study, we determined the chemical composition and antioxidant activities of the essential oils from two different varieties of khat (Catha edulis Forsk) cultivated in Ethiopia. The essential oils were extracted by hydrodistillation using the Clevenger type apparatus, identifications of compounds were made by gas chromatography and gas chromatography-mass spectrometry (GC-MS). Seventy seven different compounds were identified from essential oils of the two different khat cultivars. The essential oils in the samples from Bahir Dar and Wendo were composed of 50 and 34 compounds, respectively. The major compound identified in khat essentials oils include: limonene, 1-phenyl-1,2-propanedione, 1-hydroxy,1-phenyl-2-propanone, camphor, (sulfurous acid)-2-propylundecyl ester, hexadecane, O-mentha-1(7), 8-dien-3-ol, heptadecane, 10-methylnonadecane, (phthalic acid)-isobutyl octadecyl ester, and tritetracontane. The antioxidant and free radical scavenging activity of the oils were assessed by means of 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical assay. The scavenging activities of the oils were 23.5-23.6 μg AAE/kg of fresh khat sample.

Sign in / Sign up

Export Citation Format

Share Document