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UID:11@deq.fe.up.pt
DTSTART:20191121T170000Z
DTEND:20191121T170000Z
DTSTAMP:20210407T163436Z
URL:https://deq.fe.up.pt/events/7179/
SUMMARY:Recovery of flavonoids using novel biodegradable choline amino acid
 s ionic liquids based ATPS
DESCRIPTION:Elena Gómez Costas\, Associate Laboratory LSRE-LCM | November 
 21\, 2019 – 17h00 | FEUP Sala B020\n\nFlavonoids are components present 
 on fruits and vegetables\, which have several pharmacological properties\,
  including anti-tumor\, antioxidant\, anti-inflammatory\, among others. Th
 e extraction and separation of flavonoids from natural products is\, there
 fore\, important to their future applications.\n\nThe conventional process
 es used in the extraction of flavonoids include techniques as solid-liquid
 \, liquid-liquid or supercritical fluid extraction\, the main process to o
 btain flavonoids for biotechnological applications is hydroalcoholic extra
 ction\, using different solvents such as methanol or ethanol\, being the y
 ield and purity low\, and the consumption of solvents excessive\, causing 
 high production costs. In the mid-1950s\, Albertsoon proposed the use of A
 queous Two-Phase Systems (ATPS) as an alternative to traditional liquid-li
 quid equilibria (LLE) extraction. ATPS is a separation technique with very
  low environmental impact due to the high content of water\, recognized as
  biocompatible media for biologically active substances. Conventional ATPS
  consist of mixtures of water plus one polymer and one salt or water and t
 wo different polymers. In 2003\, Rogers reported a pioneering work about t
 he formation of ATPS by the addition of K3PO4 salts to aqueous solutions o
 f butylmethylimidazolium chloride ionic liquid (IL). Nevertheless\, the us
 e of ILs as alternative phasecomponents in ATPS has been studied\, most of
  the ILs used are derived from imidazolium and pyridinium cations with hal
 ides as anions. However\, these ILs are toxic and poorly biodegradable. In
  recent years choline amino acids ionic liquids (CAAILs) showed an excelle
 nt biodegradability and low toxicity\, and amino acids are adequate candid
 ates as anions and provide a suitable separation media for biomolecules.\n
 \nConsequently\, ATPS based on IL have been significantly explored for the
  extraction of amino acids and proteins. In view of the above-mentioned\, 
 in this work\, it presents the study of the partitioning of different flav
 onoids in new choline amino acids ionic liquids based ATPS as separation t
 echnique\, since it is recognized as a high efficient method for the separ
 ation and purification of biomolecules.\n\n\n\nElena Gómez Costas obtaine
 d her Ph.D. Thesis at the University of Vigo\, in 2008\, obtaining the The
 sis\nExtraordinary Prize. After the PhD\, she was selected by FCT for a po
 st-doctoral grant at University of Porto\, under the supervision of Profes
 sor M. Eugénia Macedo (LSRE-LCM) from January 2009 to October 2010. After
  this\, and thanks to an Ángeles Alvariño Program (Xunta de Galicia)\, s
 he continued her research career at the University of Vigo in the separati
 on of mixtures with ILs. From June 2016 to May 2019\, she was a post-docto
 ral researcher at LSRE-LCM under project AIProcMat@N2020 on the field of p
 artitioning of biomolecules using aqueous two-phase systems with ILs. From
  June 2019 she has an Assistant Research position of the FCT Stimulus of S
 cientific Employment Individual Support for developing a project on extrac
 tion of vitamins and antioxidants towards health improvement.\n\n\n\n&nbsp
 \;\n\n[Host: Eugénia Macedo]\nImage credits: Elena Gómez Costas
ATTACH;FMTTYPE=image/jpeg:https://deq.fe.up.pt/wp-content/uploads/2019/12/
 1121_1700_EGomezCostas_1920_1S-SEMI-e1576265389876.png
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