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Keywords = pracaxi nuts

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20 pages, 1974 KiB  
Article
A Comprehensive Study on the Chemical Characterization and Neuroprotective Evaluation of Pracaxi Nuts Extracts Obtained by a Sustainable Approach
by Pouya Mohammadnezhad, Alberto Valdés, Ruth E. Barrientos, Elena Ibáñez, Jane Mara Block and Alejandro Cifuentes
Foods 2023, 12(20), 3879; https://doi.org/10.3390/foods12203879 - 23 Oct 2023
Cited by 3 | Viewed by 2232
Abstract
The Amazonian Pentaclethra macroloba (Willd.) Kuntze nuts contain a lipidic fraction with health-promoting effects, but little is known about the bioactivity of other constituents. In this study, the lipidic fraction obtained using supercritical fluid extraction (SFE) with CO2 was chemically characterized by [...] Read more.
The Amazonian Pentaclethra macroloba (Willd.) Kuntze nuts contain a lipidic fraction with health-promoting effects, but little is known about the bioactivity of other constituents. In this study, the lipidic fraction obtained using supercritical fluid extraction (SFE) with CO2 was chemically characterized by using lipidomics techniques. The SFE-CO2 residue, named as pracaxi cake, was re-extracted by pressurized liquid extraction following a biorefinery approach. Using a response surface methodology and based on the extraction yield and different in vitro assays, two optimum conditions were obtained: 80% and 12.5% of ethanol at 180 °C. Under these conditions, extraction yield and different in vitro measurements related to neuroprotection were assessed. Chemical characterization of these extracts suggested the presence of triterpenoid saponins and spermidine phenolamides, which were not previously reported in pracaxi nuts. These results suggest that pracaxi oil extraction by-products are a valuable source of bioactive compounds with neuroprotective potential. Full article
(This article belongs to the Section Food Nutrition)
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13 pages, 1535 KiB  
Article
Study of the Antioxidant Power of the Waste Oil from Palm Oil Bleaching Clay
by Katiane Cunha de Melo, Ingrid Silva de Oliveira, Luiza Helena de Oliveira Pires, Luís Adriano Santos do Nascimento, José Roberto Zamian, Geraldo Narciso da Rocha Filho, Marcele Fonseca Passos, Alessandra Santos Lopes, Attilio Converti and Carlos Emmerson Ferreira da Costa
Energies 2020, 13(4), 804; https://doi.org/10.3390/en13040804 - 12 Feb 2020
Cited by 8 | Viewed by 4020
Abstract
Palm oil is one of the most consumed oils, one of whose refining steps is the removal of pigments and other substances using bleaching clay as adsorbent. Worldwide production of this oil was 70 million tons in 2017, requiring 1 t of clay [...] Read more.
Palm oil is one of the most consumed oils, one of whose refining steps is the removal of pigments and other substances using bleaching clay as adsorbent. Worldwide production of this oil was 70 million tons in 2017, requiring 1 t of clay to produce 1000 t of refined oil. The residual bleaching clay, having an oil fraction (12.70%) rich in phenolics, carotenoids and tocopherols, was extracted in this study with ethanol to obtain an antioxidant-rich palm oil bleaching extract (POBE), with the aim of using it as a natural antioxidant source. The POBE antioxidant capacity determined by the DPPH method corresponded to a 20.29% inhibition of radical formation. The POBE was also tested for its potential to enhance oxidative stability of passion fruit, pracaxi and Brazil nut oils used as reference oils, and compared to common synthetic antioxidants (tert-butylhydroquinone and propyl gallate), either separately as controls or in mixtures with them. Besides the increased oxidative stability of these oils induced by the POBE, a positive synergistic effect between it and the synthetic antioxidants was observed. These results taken together suggest that the exploitation of the waste oil from bleaching clay as an additive to improve the oxidative stability of biofuels or lubricating oils is feasible. Full article
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