Effect of extraction techniques on the chemical composition and antioxidant activity of Eucalyptus camaldulensis var. brevirostris leaf oils

Fadel, Hoda H. M.; Marx, Friedhelm; El‐Sawy, A. A.; El‐Ghorab, Ahmed H.

doi:10.1007/s002170050405

Cited by 75 publications

(51 citation statements)

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“…The study proposed that steam temperature needs to be regulated below saturated temperature throughout the extraction process. This finding had been supported by lots of other published works [3][4][5][6][7]. Nevertheless, there were very few literature on the control development for ext raction system was found.…”

Section: Introductionsupporting

confidence: 63%

Adaptive Steam Temperature Regulation for Essential Oil Extraction Process

Tajjudin¹,

Rahiman²,

Ishak³

et al. 2012

CONTROL

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Essential oil is volat ile and sensitive to excessive heat. Many studies had shown that temperature during extraction process had a great impact on the oil quality. Despite of that, until now there are very few research had been published on the control development of essential oil extraction system. Hence, this study was commenced part icularly on the development of a regulated essential oil extract ion system using self-tuning control. A self-tuning control was applied using pole-assignment method to regulate the steam temperature throughout the extraction process. Combination of controller poles in real and imaginary axis may influence the closed-loop response so that the steam can reach the set point faster but yet with min imal overshoot. Extensive analysis was done by simu lation in order to understand the effect of the poles location and also the selection of sampling time over the closed-loop response. Outcome fro m the simu lation was applied on the real process where the controller produced satisfactory result as expected. The controller was able to regulate the steam temperature at a desired level and maintained within ±2% output boundary.

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Section: Introductionsupporting

confidence: 63%

Adaptive Steam Temperature Regulation for Essential Oil Extraction Process

Tajjudin¹,

Rahiman²,

Ishak³

et al. 2012

CONTROL

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“…Recent studies also demonstrated that the reduction in oxidative stress and lipid peroxidation observed in the EOP-treated animals can be attributed to the vital role of essential oils as effective antioxidants 41, 43 46 . In this regard, the terpenoids are responsible for the antioxidant action of the essential oils used in this study 47,48 .…”

Section: Discussionmentioning

confidence: 99%

Protective Effects of <i>Pinus halepensis</i> L. Essential Oil on Aspirin-induced Acute Liver and Kidney Damage in Female Wistar Albino Rats

et al. 2016

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“…Phellandrene has the highest reducing ability (65.500 mmol/kg), while menthol and menthone (0.165 and 0.168 mmol/kg) show the lowest. The best antioxidants are flavonoids (Vessal et al, 2003;Molina et al, 2003), therefore, the values are related to a well-known flavonoid antioxidant, quercetin, and to its glycoside, rutin. The antioxidant capacities of the compounds and of volatile oils show concentration dependence as seen in Fig.…”

Section: Resultsmentioning

confidence: 99%

Antioxidant Property of Volatile Oils Determined by the Ferric Reducing Ability

Lado

Then

Varga

et al. 2004

Zeitschrift Für Naturforschung C

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Some current oils and their main components were studied to determine their antioxidant values. This was done by using the modified method of ferric reducing ability of plasma. It has been established that volatile oils of medicinal plants have on average a reducing capacity of 3.5Ð220 mmol/kg oil. The reducing capacities of the main constituents of volatile oils are 0.165Ð65.5 mmol/kg in concentrated oils. The highest reducing capacity was showd for phellandrene (65.438 ð 0.166 mmol/kg) and anethole (50.087 ð 0.160 mmol/kg) while the lowest values were obtained for menthol (0.165 ð 0.023 mmol/kg) and menthone (0.168 ð 0.010 mmol/kg). It has been stated that the antioxidant values of the main constituents are lower than those of volatile oils. The reducing capacity of the main constituents of medicinal plant drugs at different concentrations was also determined.

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Effect of extraction techniques on the chemical composition and antioxidant activity of Eucalyptus camaldulensis var. brevirostris leaf oils

Cited by 75 publications

References 0 publications

Adaptive Steam Temperature Regulation for Essential Oil Extraction Process

Adaptive Steam Temperature Regulation for Essential Oil Extraction Process

Protective Effects of <i>Pinus halepensis</i> L. Essential Oil on Aspirin-induced Acute Liver and Kidney Damage in Female Wistar Albino Rats

Antioxidant Property of Volatile Oils Determined by the Ferric Reducing Ability

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