Supercritical fluid extraction of dandelion leaves

Simándi, Béla; Kristó, Sz. T.; Kéry, Ágnes; Selmeczi, L. K.; Kmecz, Ildikó; Kemény, Sándor

doi:10.1016/s0896-8446(02)00012-8

Cited by 46 publications

(21 citation statements)

References 5 publications

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“…85 The main advantages claimed 80 are: the higher purity of extracted compounds and the use of a thermally non-aggressive and non-toxic technology, thereby avoiding degradation of these components. 83,86 Supercritical fluids may also be used to extract lignin, 81,87 if a correct co-solvent is used, and to transport and introduce desirable components such as preservatives. 88,89 Phenolic compounds Phenolic compounds are solvent extractable components of low molecular weight.…”

Section: Extractable Componentsmentioning

confidence: 99%

Cork: properties, capabilities and applications

Silva¹,

Sabino²,

Fernandes³

et al. 2008

International Materials Reviews

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Cork is a natural, renewable, sustainable raw material that has been used for many centuries. As a result of this very long term interest, the scientific literature on cork is extensive. The present review focuses on the chemical composition, physical and mechanical properties of cork and on its products and sub-products. The substantial efforts to fully characterise cork, as well as new developments and evolving research, are reviewed, beginning with its histology, growth and morphology (at macro-and microscales). The chemical structure is analysed in detail, covering both the materials that form the wall structure and the low molecular weight, extractable components. The unique properties of cork are discussed and correlated with current knowledge on morphology and chemical structure. Finally, the important industrial applications of cork are reviewed, in the context of research to provide cork with novel, high added-value applications.

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Section: Extractable Componentsmentioning

confidence: 99%

Cork: properties, capabilities and applications

Silva¹,

Sabino²,

Fernandes³

et al. 2008

International Materials Reviews

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“…A key precursor of triterpenoids has been verified as β‐amyrin, which particularly reflects the potential anti‐inflammatory, anti‐hyperglycemic, and hypolipidemic effects besides the pharmacological activities similar as glycyrrhizin . β‐amyrin can be extracted with nonpolar solvent from plant with very low yield, that is, the highest content found in dandelion is only 5 mg/g dry material, resulting in its complicated and costly purification procedure generally including supercritical fluid extraction/adsorption, decolorization, and multistep chromatographic separation, which makes the high price of β‐amyrin about $2500 per gram . In addition, the extraction of β‐amyrin from the natural sources can be time consuming, wasteful on the natural resources and even destructive to plant communities .…”

Section: Introductionmentioning

confidence: 99%

Refactoring β‐amyrin synthesis in Saccharomyces cerevisiae

et al. 2015

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Triterpenoids are a highly diverse group of natural products and used particularly as medicine. Here, a strategy combining stepwise metabolic engineering and transcriptional control was developed to strengthen triterpenoid biosynthesis in Saccharomyces cerevisiae. Consequently, an efficient biosynthetic pathway for producing β‐amyrin, a commercially valuable compound and precursor of triterpenoids, was constructed through expressing a plant‐derived β‐amyrin synthase. Introducing a heterologous squalene monooxygenase greatly dragged intermediate metabolite squalene toward β‐amyrin. Increasing squalene pool by overexpressing IPP isomerase, FPP, and squalene synthase further enhanced β‐amyrin synthesis of 49‐folds. Through reconstructing the promoters with the binding site of transcription factor UPC2, directed transcriptional regulation on engineered pathway was availably achieved, resulting in β‐amyrin titer increased by 65‐folds. Using ethanol fed‐batch fermentation, β‐amyrin titer was finally improved up to 138.80 mg/L with a yield of 16.30 mg/g dry cell, almost 185 and 232 and folds of the initially engineered strain, respectively. © 2015 American Institute of Chemical Engineers AIChE J, 61: 3172–3179, 2015

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“…Among the supercritical fluids (SFs), carbon dioxide (CO 2 ) is widely used because supercritical CO 2 (Sc‐CO 2 ) provides some advantages over conventional extraction processes . Several research works have been carried out on phytosterol extraction and fractionation using SC‐CO 2 from various plant sources . These studies showed that SFE is an effective technology for the recovery of phytosterol.…”

Section: Introductionmentioning

confidence: 99%

Phytosterols and their extraction from various plant matrices using supercritical carbon dioxide: a review

et al. 2014

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Phytosterols provide important health benefits: in particular, the lowering of cholesterol. From environmental and commercial points of view, the most appropriate technique has been searched for extracting phytosterols from plant matrices. As a green technology, supercritical fluid extraction (SFE) using carbon dioxide (CO2) is widely used to extract bioactive compounds from different plant matrices. Several studies have been performed to extract phytosterols using supercritical CO2 (SC-CO2) and this technology has clearly offered potential advantages over conventional extraction methods. However, the efficiency of SFE technology fully relies on the processing parameters, chemistry of interest compounds, nature of the plant matrices and expertise of handling. This review covers SFE technology with particular reference to phytosterol extraction using SC-CO2. Moreover, the chemistry of phytosterols, properties of supercritical fluids (SFs) and the applied experimental designs have been discussed for better understanding of phytosterol solubility in SC-CO2.

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Supercritical fluid extraction of dandelion leaves

Cited by 46 publications

References 5 publications

Cork: properties, capabilities and applications

Cork: properties, capabilities and applications

Refactoring β‐amyrin synthesis in Saccharomyces cerevisiae

Phytosterols and their extraction from various plant matrices using supercritical carbon dioxide: a review

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