scholarly journals Determination of fixed oil components of laurel (Laurus nobilis L.) obtained by different methods

2021 ◽  
Author(s):  
Musa TÜRKMEN ◽  
Oğuzhan KOÇER
Keyword(s):  
Laurus Nobilis ◽  
Oil Components

scholarly journals Characterization of Varietal Differences in Essential Oil Components of Hops (Humulus lupulus) by SFC–FTIR Spectroscopy

2000 ◽  
Vol 83 (3) ◽  
pp. 621-626 ◽  
Author(s):  
Rita H Auerbach ◽  
Kenan Dost ◽  
George Davidson
Keyword(s):  
Essential Oil ◽  
Chromatographic Method ◽  
Flow Cell ◽  
Humulus Lupulus ◽  
Ftir Analysis ◽  
Varietal Differences ◽  
Wave Numbers ◽  
Oil Components

Abstract A supercritical fluid chromatographic method combined with Fourier-transform infrared spectroscopy detection (SFC–FTIR) was developed for determination of varietal differences in essential oil constituents in hops (Humulus lupulus). Infrared spectra (IR) of the major constituents of essential oil of hops were taken as films deposited on AgCl discs and compared with those obtained after chromatographic separation in the IR flow-cell with supercritical carbon dioxide (scCO2). Spectra from AgCl discs were comparable to those in scCO2, but in scCO2 most of the bands appeared approximately 8–10 cm−1 to higher wave numbers. Open-tubular SFC–FTIR analysis of the essential oil of 4 different hop varieties was performed. The SFC–FTIR chromatograms showed differences in the location and relative intensity of the peaks depending on the variety, which was further confirmed by consideration of their FTIR spectra.

Determination of Final Steps in Biosyntheses of Essential Oil Components inPerilla frutescens

Planta Medica ◽  
1989 ◽  
Vol 55 (03) ◽  
pp. 251-253 ◽  
Author(s):  
A. Nishizawa ◽  
G. Honda ◽  
M. Tabata
Keyword(s):  
Essential Oil ◽  
Oil Components

scholarly journals DETERMINATION OF SOME AGRONOMICAL CHARACTERISTICS AND ESSENTIAL OIL VARIATION IN DIFFERENT LOCAL Ocimum basilicum L. ECOTYPES UNDER SEMI-ARID CLIMATIC CONDITIONS

2019 ◽  
Vol 18 (3) ◽  
pp. 3-15
Author(s):  
Suleyman Kizil ◽  
Ozlem Toncer ◽  
Tahsin Sogut ◽  
Emel Diraz ◽  
Sengul Karaman
Keyword(s):  
Essential Oil ◽  
Climatic Conditions ◽  
Gas Chromatography Mass Spectrometry ◽  
Methyl Chavicol ◽  
Leaf Yield ◽  
Harvest Data ◽  
Oil Components ◽  
Main Components ◽  
Semi Arid

The study aimed to determine agronomic characteristics and essential oil components of different basil ecotypes in semi-arid climatic conditions of South Eastern Anatolia, Diyarbakir, Turkey. Two-year harvest data about fresh and dry herb yield, dry leaf yield, essential oil content and its components from the plants of year 2015 and 2016 was analyzed in this study. Essential oil components were detected by gas chromatography/mass spectrometry (GC/MS). The resulting outcomes demonstrated that both ecotypes and harvests had important effects on fresh and dry herb, dry leaf yield and essential oil contents of sweet basil. The highest dry leaf yield was noted from green leafy ecotypes and from second harvest stage. Twenty-three constituents were detected in the essential oil of O. basilicum ecotypes. The main components of basil essential oil were linalool, methyl chavicol, neral, geranial and methyl cinnamate that differed according to ecotypes and harvests during experimental years 2015 and 2016. Purple leafy basil ecotypes were determined as linalool rich, while greenish leaf ecotypes were abundant in methyl chavicol. Silbe – green ecotype contains higher neral and geranial levels than the other ecotypes. It was concluded that basil plant could be grown successfully and harvested two or more times to prefer for maximum dry leaf yield and essential oil contents under semi-arid climatic conditions.

scholarly journals Determination of essential oil components, mineral matter, and heavy metal content of Salviavirgata Jacq. grown in culture conditions

2019 ◽  
Vol 43 (4) ◽  
pp. 395-404 ◽  
Author(s):  
Belgin COŞGE ŞENKAL ◽  
Tansu USKUTOĞLU ◽  
Cüneyt CESUR ◽  
Volkan ÖZAVCI ◽  
Hülya DOĞAN
Keyword(s):  
Heavy Metal ◽  
Essential Oil ◽  
Metal Content ◽  
Culture Conditions ◽  
Heavy Metal Content ◽  
Mineral Matter ◽  
Oil Components

Modeled Exposures To Freshly Spilled Crude Oil

1999 ◽  
Vol 1999 (1) ◽  
pp. 1195-1198
Author(s):  
Evan C. Thayer ◽  
Joan G. Tell
Keyword(s):  
Hydrogen Sulfide ◽  
Crude Oil ◽  
Oil Spill ◽  
Relevant Information ◽  
Dispersion Models ◽  
Safe Operation ◽  
Response Planning ◽  
Exposure Data ◽  
Oil Components

ABSTRACT Understanding initial oil spill responder's exposures is essential for planning purposes and a safe operation; however, there is little relevant information in the literature. Potential oil components of concern include hydrogen sulfide and benzene. This paper uses three dispersion models to evaluate and discuss these potential responder health exposures. Key parameters addressed include the effects of the thickness of the spill and the component concentration in the crude oil. Determination of the amount of time needed for site concentrations to fall below the relevant health guidelines is an important outcome. Model results are compared with available exposure data in the literature. Implications for response planning are discussed.

scholarly journals Antimicrobial Activities of Laurus nobilis Leaves Ethanol Extract on Staphylococcus aureus, Salmonellae typhi, and Escherichia coli.

2021 ◽  
Vol 9 (2) ◽  
pp. 119
Author(s):  
Khawla Abdullah Sakran ◽  
Dadik Raharjo ◽  
Ni Made Mertaniasih
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Minimum Bactericidal Concentration ◽  
Ethanol Extract ◽  
Multidrug Resistant ◽  
Antimicrobial Activities ◽  
Resistant Bacteria ◽  
Zone Of Inhibition ◽  
Laurus Nobilis

Laurus nobilis is one of the most well-known, most frequently used plants is from Lauraceae family which contains up 2.500 species that grow in the subtropics and tropics of the Mediterranean region and Indonesia. This study was supposed to investigate the antimicrobial eff ect of L.nobilis leaves ethanol extract on Staphylococcus aureus, Salmonellae typhi, and Escherichia coli. This preliminary study examined the antimicrobial eff ect of L.nobilis leaves ethanol extract. The method used Agar-well diff usion for determination of the zone of inhibition and the minimum bactericidal concentration to investigate the activity of L.nobilis leaves ethanol extract at 100% concentration . The results revealed that extract of L. nobilis leaves had the antibacterial activity against Staphylococcus aureus with a zone of inhibition (16.3 ±1.5 mm), Staphylococcus aureus with (14.5±0.5 mm), and weak antimicrobial activity against Escherichia coli (11.3±1.1mm). Also, through the minimum bactericidal concentration experiment, the L.nobilis leaves ethanol extract had activity on Staphylococcus aureus and Salmonellae typhi, it’s killed the bacteria in all concentration start it from 5×107 to 5×104. But the activity on Escherichia coli just weaken concentration 5×107 and 106. This research has concluded that the L.nobilis leaves ethanol extract exhibited a signifi cant antimicrobial eff ect against Staphylococcus aureus and Salmonellae typhi then Escherichia coli that is considered a kind of multidrug-resistant bacteria.

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