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Research Project
Center for Nuclear Sciences and Technologies
Funder
Authors
Publications
Applications of bioactive compounds extracted from olive industry wastes: a review
Publication . Margaça, Fernanda M.A.; Santos‐Buelga, Celestino; Ferreira, Isabel C.F.R.; Cabo Verde, Sandra; Barros, Lillian
The wastes generated during the olive oil extraction process, even if presenting
a negative impact for the environment, contain several bioactive compounds
that have considerable health benefits. After suitable extraction and purification,
these compounds can be used as food antioxidants or as active ingredients in
nutraceutical and cosmetic products due to their interesting technological and
pharmaceutical properties. The aim of this review, after presenting general applications
of the different types of wastes generated from this industry, is to focus
on the olive pomace produced by the two-phase system and to explore the challenging
applications of the main individual compounds present in this waste.
Hydroxytyrosol, tyrosol, oleuropein, oleuropein aglycone, and verbascoside are
the most abundant bioactive compounds present in olive pomace. Besides their
antioxidant activity, these compounds also demonstrated other biological properties
such as antimicrobial, anticancer, or anti-inflammatory, thus being used
in formulations to produce pharmaceutical and cosmetic products or in the fortification
of food. Nevertheless, it is mandatory to involve both industries and
researchers to create strategies to valorize these byproducts while maintaining
environmental sustainability.
Phenolic compounds from irradiated olive wastes: optimization of the heat-assisted extraction using response surface methodology
Publication . Madureira, Joana; Melgar Castañeda, Bruno; Santos-Buelga, Celestino; Margaça, Fernanda M.A.; Ferreira, Isabel C.F.R.; Barros, Lillian; Cabo Verde, Sandra
Olive pomace, an environmentally detrimental residue generated during olive oil extraction,
contains bioactive compounds in demand by the food industry. To valorize this waste product a
suitable yield for the extraction process is required. Heat-assisted extraction of bioactive compounds
from olive pomace was optimized by a circumscribed central composite design and response surface
methodology. Our previous studies indicated that irradiation could improve 2.4-fold the extractability
of the main phenolic compounds from olive pomace. The effect of extraction time, temperature and
solvent concentration on the yield of polyphenols from irradiated olive pomace at 5 kGy was tested.
Hydroxytyrosol-1- -glucoside, hydroxytyrosol, tyrosol and caffeic acid were quantified by High
Performance Liquid Chromatography to calculate the total polyphenol content. The optimal general
conditions by RSM modeling were extraction time of 120 min, temperature of 85 C, and 76% of
ethanol in water. Using these selected conditions, 19.04 1.50 mg/g dry weight, 148.88 8.73 mg/g
extract of total polyphenols were obtained, representing a yield of 13.7%, which was consistent with
the value predicted by the model. This work demonstrated the potential of residues from the olive
oil industry as a suitable alternative to obtain compounds that could be used as ingredients for the
food industry.
Raman measurements on gamma irradiated chestnut fruits
Publication . Antonio, Amilcar L.; Cabo Verde, Sandra; Cerqueira, M. Fátima
Irradiation for food preservation is on use in several countries for different types of foods: fish, meat, vegetables,
etc., with its application accepted and regulated by national and international food safety agencies. In this work
an irradiation preservation process was applied on chestnut fruits, studying its impact on fruit characteristics.
Here, we applied Raman scattering measurements on two varieties of non-irradiated and irradiated chestnut
fruits at different irradiation doses (1, 2 and 5 kGy), to identify the main peaks associated with main molecular
structures present on chestnut fruits and their behavior (intensity, peak position and full width at half maximum-
FWHM) with irradiated doses. The intensity ratios of relevant peaks were used to correlate the obtained results
with the dose and/or variety. With the focus of this research centered not only on structural changes after
processing but also on the possibility to use this tool to easily distinguish between varieties and/or processed
fruits by irradiation. From the results presented in this study, following the appropriate Raman peaks, it was
possible to clearly identify the chestnut fruits varieties and also to discriminate irradiated from non-irradiated
samples. From our knowledge, this is the first time that Raman scattering measurements were performed on chestnut fruits submitted to an irradiation preservation process.
Applications of bioactive compounds extracted from olive industry wastes: a review
Publication . Madureira, Joana; Margaça, Fernanda M.A.; Santos-Buelga, Celestino; Ferreira, Isabel C.F.R.; Cabo Verde, Sandra; Barros, Lillian
The wastes generated during the olive oil extraction process, even if presenting a negative impact for the environment, contain several bioactive compounds that have considerable health benefits. After suitable extraction and purification, these compounds can be used as food antioxidants or as active ingredients in nutraceutical and cosmetic products due to their interesting technological and pharmaceutical properties. The aim of this review, after presenting general applications of the different types of wastes generated from this industry, is to focus on the olive pomace produced by the two-phase system and to explore the challenging applications of the main individual compounds present in this waste. Hydroxytyrosol, tyrosol, oleuropein, oleuropein aglycone, and verbascoside are the most abundant bioactive compounds present in olive pomace. Besides their antioxidant activity, these compounds also demonstrated other biological properties such as antimicrobial, anticancer, or anti-inflammatory, thus being used in formulations to produce pharmaceutical and cosmetic products or in the fortification of food. Nevertheless, it is mandatory to involve both industries and researchers to create strategies to valorize these byproducts while maintaining environmental sustainability.
Applications of bioactive compounds extracted from olive industry wastes: a review
Publication . Madureira, Joana; Margaça, Fernanda M.A.; Santos‐Buelga, Celestino; Ferreira, Isabel C.F.R.; Verde, Sandra Cabo; Barros, Lillian
The wastes generated during the olive oil extraction process, even if presenting
a negative impact for the environment, contain several bioactive compounds
that have considerable health benefits. After suitable extraction and purification,
these compounds can be used as food antioxidants or as active ingredients in
nutraceutical and cosmetic products due to their interesting technological and
pharmaceutical properties. The aim of this review, after presenting general applications
of the different types of wastes generated from this industry, is to focus
on the olive pomace produced by the two-phase system and to explore the challenging
applications of the main individual compounds present in this waste.
Hydroxytyrosol, tyrosol, oleuropein, oleuropein aglycone, and verbascoside are
the most abundant bioactive compounds present in olive pomace. Besides their
antioxidant activity, these compounds also demonstrated other biological properties
such as antimicrobial, anticancer, or anti-inflammatory, thus being used
in formulations to produce pharmaceutical and cosmetic products or in the fortification
of food. Nevertheless, it is mandatory to involve both industries and
researchers to create strategies to valorize these byproducts while maintaining
environmental sustainability.
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Funders
Funding agency
Fundação para a Ciência e a Tecnologia
Funding programme
6817 - DCRRNI ID
Funding Award Number
UIDB/04349/2020