Eduardo Medina Pradas

Dr. Eduardo Medina Pradas

Food Biotechnology, Instituto de la Grasa, Seville, Spain
orcid

Research Focus & Metrics

Academic Career Length

21Years (2006-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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13 June 2006 in Journal of Agricultural and Food Chemistry
Verified
Journal Article
Closed access
EPEduardo Medina Pradas
Eduardo Medina Pradas
ACAntonio de Castro
Antonio de Castro
CBConcepción Romero Barranco
Concepción Romero Barranco
MBManuel Brenes
Manuel Brenes

17 January 2007 in Journal of Agricultural and Food Chemistry
Verified
Journal Article
Closed access
CBConcepción Romero Barranco
Concepción Romero Barranco
EPEduardo Medina Pradas
Eduardo Medina Pradas
JVJulio Vargas
Julio Vargas
MBManuel Brenes
Manuel Brenes
ACAntonio De Castro
Antonio De Castro

1 February 2010 in Food Chemistry
Verified
Journal Article
Closed access
CBConcepción Romero Barranco
Concepción Romero Barranco
AGAranzazu García
Aranzazu García
EPEduardo Medina Pradas
Eduardo Medina Pradas
MMMaria-Victoria Ruiz Mendez
Maria-Victoria Ruiz Mendez
ACAntonio de Castro
Antonio de Castro
MBManuel Brenes
Manuel Brenes

31 October 2007 in Journal of Agricultural and Food Chemistry
Verified
Journal Article
Closed access
EPEduardo Medina Pradas
Eduardo Medina Pradas
MBManuel Brenes
Manuel Brenes
CBConcepción Romero Barranco
Concepción Romero Barranco
AGAranzazu García
Aranzazu García
ACAntonio de Castro
Antonio de Castro

9 July 2019 in Food & Function
Verified
Journal Article
Open access
PDF file
EPEduardo Medina Pradas
Eduardo Medina Pradas
CBConcepción Romero Barranco
Concepción Romero Barranco
PGPedro García
Pedro García
MBManuel Brenes
Manuel Brenes
A large spectrum of beneficial health properties has been attributed to olive leaves. This study was undertaken to characterize the bioactive compounds of commercial olive leaf extracts and olive leaves and their infusions. High variability of bioactive compounds was found among commercial samples. Polyphenol was detected in a range of 44–108 g kg−1 and 7.5–250 g kg−1 for olive leaves and olive leaf extracts, respectively. The main phenol was oleuropein, representing 74–94% of total phenols. However, only 17–26% of polyphenols were diffused to the aqueous phases when olive leaf infusions were prepared. Triterpenic acids were found in a range of 26–37 g kg−1 in olive leaves, but not detected in the infusions. Hence, the absence of the latter substances and the low oleuropein diffusion in olive leaf infusions make new studies necessary to maximize the presence of these bioactive compounds in the final product.

1 September 2016 in Food Chemistry
Verified
Journal Article
Open access
ECEVA MARIA RAMÍREZ CASTRO
EVA MARIA RAMÍREZ CASTRO
MBManuel Brenes
Manuel Brenes
PGPedro García
Pedro García
EPEduardo Medina Pradas
Eduardo Medina Pradas
CBConcepción Romero Barranco
Concepción Romero Barranco
The bitter taste of olives is mainly caused by the phenolic compound named oleuropein and the mechanism of its hydrolysis during the processing of natural green olives was studied. First, a rapid chemical hydrolysis of oleuropein takes place at a high temperature of 40°C and at a low pH value of 2.8, but the chemical hydrolysis of the bitter compound is slow at the common range of pH for these olives (3.8-4.2). However, decarboxymethyl elenolic acid linked to hydroxytyrosol and hydroxytyrosol have been found in a high concentration during the elaboration of natural green olives. When olives were heated at 90°C for 10min before brining, these compounds are not formed. Hence, the debittering process in natural green olives is due to the activity of β-glucosidase and esterase during the first months of storage and then a slow chemical hydrolysis of oleuropein happens throughout storage time.