A comparative study on phenolic composition, antioxidant activity and essential oil content of wild and cultivated sage (Salvia fruticosa Miller) as influenced by storage

2012 ◽  
Vol 39 ◽  
pp. 170-176 ◽  
Author(s):  
Cuneyt Dincer ◽  
Ayhan Topuz ◽  
Hilal Sahin-Nadeem ◽  
Kubra Sultan Ozdemir ◽  
Ihsan Burak Cam ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Essential Oil ◽  
Comparative Study ◽  
Oil Content ◽  
Phenolic Composition ◽  
Salvia Fruticosa

scholarly journals Ultrasound-Enhanced Subcritical Fluid Extraction of Essential Oil from Nymphaea alba var and Its Antioxidant Activity

2019 ◽  
Vol 102 (5) ◽  
pp. 1448-1454
Author(s):  
Ying Zhao ◽  
Yang-Yang Fan ◽  
Wen-Gang Yu ◽  
Jian Wang ◽  
Wenju Lu ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Essential Oil ◽  
Oil Content ◽  
Chemical Constituents ◽  
Fluid Extraction ◽  
Water Lily ◽  
Nymphaea Alba ◽  
Subcritical Fluid Extraction ◽  
Subcritical Fluid

Abstract Background: The essential oil content of the water lily is extremely low; thus, finding a new method that can extract essential oil from water lilies with a high extraction rate and no residual organic solvents is essential. Objective: The optimal processing conditions for the ultrasound-enhanced subcritical fluid extraction of essential oil from Nymphaea alba var (red water lily) and the antioxidant activity of the essential oil in vitro are investigated to provide theoretical bases for identification and development. Methods: Single-factor experiments and orthogonal designs are performed to determine the effects of extraction conditions on essential oil yields. The chemical composition of essential oil is analyzed using GC–MS. Results: The optimum extraction parameters are established as follows: extraction temperature, 35°C; extraction time, 30 min/time for four times; ratio of material to liquid, 1:3; ultrasound power, 250 W/L; and ultrasonic frequency, 20 kHz. The extraction rate of essential oil is 0.315% under these conditions. Eleven components comprise more than 1% content. The main chemical constituents are 8-hexadecyne (31.04%) and 2,6,10-trimethyl-tetradecane (3.95%). The essential oil from N. alba var has an antioxidant activity in vitro; however, its antioxidant activity is weaker than that of butylated hydroxytoluene. Conclusions: Subcritical fluid is suitable for the extraction of essential oil from N. alba var, and the essential oil has a good antioxidant activity. Highlights: The essential oil content of N. alba var is 0.315%. Forty-seven chemical constituents are identified and isolated from N. alba var and analyzed by GC–MS.

scholarly journals Phenolic composition and antioxidant activity of Rocha pear and other pear cultivars – A comparative study

2010 ◽  
Vol 2 (2) ◽  
pp. 153-157 ◽  
Author(s):  
Joana Salta ◽  
Alice Martins ◽  
Rui G. Santos ◽  
Nuno R. Neng ◽  
José M.F. Nogueira ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Comparative Study ◽  
Phenolic Composition

scholarly journals Comparative Study of Chemical Composition and Antioxidant Activity of Essential Oil Extracted from Acorus calamus L. Leaves

2018 ◽  
Vol 8 (4) ◽  
pp. 203-211 ◽  
Author(s):  
Pinky Chaubey ◽  
Archana Parki ◽  
Om Prakash ◽  
Ravendra Kumar ◽  
A.K Pant
Keyword(s):  
Antioxidant Activity ◽  
Chemical Composition ◽  
Essential Oil ◽  
Comparative Study ◽  
Acorus Calamus

scholarly journals The chemical composition, antimicrobial and antioxidant activities of the essential oil of Salvia fruticosa growing wild in Libya

2013 ◽  
Vol 65 (1) ◽  
pp. 321-329 ◽  
Author(s):  
Abdulhamid Giweli ◽  
Ana Dzamic ◽  
Marina Sokovic ◽  
M.S. Ristic ◽  
P. Janackovic ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Antioxidant Activity ◽  
Free Radical ◽  
Chemical Composition ◽  
Essential Oil ◽  
Antioxidant Activities ◽  
Radical Scavenging ◽  
Free Radical Scavenging ◽  
Gram Negative ◽  
Salvia Fruticosa

The composition of essential oil isolated from Salvia fruticosa, wild growing in Libya, was analyzed by GC and GC-MS. Forty-five compounds could be identified. The essential oil contained 1,8-cineole (49.34%), camphor (7.53%), ?-pinene (7.38%), myrcene (7.38%), ?-pinene (5.15%), ?-caryophyllene (4.13%) and ?-terpineol (3.25). Antioxidant activity was analyzed using the DPP H free radical scavenging method and low antioxidant activity was found (IC50 = 15.53 mg/ml). The oil was also screened for its antimicrobial activity against eight bacteria (four Gram-negative and four Gram-positive) and eight fungi. The essential oil of S. fruticosa showed minimal inhibitory activity (MIC) at 0.125-1.5 mg/ml and bactericidal (MBC) at 0.5-2.0 mg/ml. In addition, it exhibited fungistatic (MIC) at 0.125-1.0 mg/ml and fungicidal effect (MFC) at 0.125-1.5 mg/ml.

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