The application of a novel industrial process based on the hydrothermal treatment of olive oil waste (alperujo) led to a final liquid phase that contained a high concentration of simple phenolic compounds. In this study the effect of pH on phenol extraction with ethyl acetate from the aqueous phase of hydrothermally treated alperujo at 160°C/60min (without modification, pH 4.5, and adjusted to pH 2.5) was evaluated, beside the increase of hydroxytyrosol during the storage. The variation of the concentration of phenolic compounds in each extract was analyzed by HPLC. The phenolic extract obtained at pH 4.5 presented a higher proportion of total and individual phenols and better antioxidant capacity in vitro than the extract obtained at pH 2.5. The use of lower pH values enhances the concentration of hydroxytyrosol in the liquid diminishing the storage times.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.foodchem.2016.09.141 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Effect of Ethanol Treatment and Calcination Temperature on Water Vapor Adsorption properties of MCM-41.
ACS Appl Mater Interfaces
December 2024
Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, No. 2, Nengyuan Rd., Tianhe DistrictGuangzhou 510640, China.
MCM-41, a mesoporous material with a high surface area and tunable pore size, shows great potential for water vapor adsorption. However, due to its large pore size, the effective adsorption capacity at medium to low relative partial pressures is limited in adsorption chiller applications. In this work, MCM-41 was successfully synthesized at room temperature using cetyltrimethylammonium bromide (CTAB) as a templating agent.
View Article and Find Full Text PDFDioxin-like polychlorinated biphenyls (dl-PCB) in hydrochars and biochars: Review of recent evidence, pollution levels, critical gaps, formation mechanisms and regulations.
J Hazard Mater
November 2024
Energy and Resources Institute, Charles Darwin University, Ellengowan Drive, Purple 12.01.08, Casuarina, NT 0810, Australia. Electronic address:
Contamination of chars with dioxin-like polychlorinated biphenyls (dl-PCB) significantly limits their use and hinders their deployment in the circular bioeconomy, specifically in applications that may lead to dietary exposure. Here, for the first time, we review the levels of contamination of chars produced from pyrolysis and hydrothermal carbonisation (HTC) with dl-PCB congeners. We conduct a detailed and critical examination of the role played by the processing parameters, such as temperature and residence time, and the reaction mechanisms, to detoxify the biomass under an oxygen-free atmosphere during its valorisation.
View Article and Find Full Text PDFCopper(II) Oxide Spindle-like Nanomotors Decorated with Calcium Peroxide Nanoshell as a New Nanozyme with Photothermal and Chemodynamic Functions Providing ROS Self-Amplification, Glutathione Depletion, and Cu(I)/Cu(II) Recycling.
ACS Appl Mater Interfaces
December 2024
Bioengineering Division, Hacettepe University, Ankara 06800, Turkey.
Uniform, mesoporous copper(II) oxide nanospindles (CuO NSs) were synthesized via a method based on templated hydrothermal oxidation of copper in the presence of monodisperse poly(glycerol dimethacrylate--methacrylic acid) nanoparticles (poly(GDMA--MAA) NPs). Subsequent decoration of CuO NSs with a CaO nanoshell (CuO@CaO NSs) yielded a nanozyme capable of Cu(I)/Cu(II) redox cycling. Activation of the Cu(I)/Cu(II) cycle by exogenously generated HO from the CaO nanoshell significantly enhanced glutathione (GSH) depletion.
View Article and Find Full Text PDFTracing Sentinel Lymph Nodes and Inhibiting Lymphatic Metastasis with TiN Nanobipyramids Through Photothermal Therapy.
Int J Nanomedicine
December 2024
Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, 999077, People's Republic of China.
Background: The lymphatic system is the major route of cancer metastasis, and sentinel lymph nodes (SLNs) are the first station for the spread of cancer cells. Accurate identification of SLNs by tracers during surgery is crucial for SLN biopsy and lymphadenectomy. However, conventional monomodal tracers such as blue dyes and carbon nanoparticles often induce a misjudgment of SLNs and thus are still unsatisfying for clinical applications.
View Article and Find Full Text PDFDiscrimination of normal/cancer cells in bioimaging through a rolling circle amplification-enhanced red carbon dots-embedded multivalent aptamers nanoplatform.
Talanta
December 2024
College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, China. Electronic address:
Glutathione (GSH) is a key biomarker closely associated with cancer, and its content varies greatly between normal cells and cancer cells. However, intracellular detection of GSH was challenging because existing probes not only have a long detection time but also have fluorescence in the blue-green region that overlaps with the biological matrix's spontaneous fluorescence, thus affecting the detection accuracy. Therefore, a new red fluorescent nano-probe was needed to rapidly and accurately detected GSH within the biological matrix.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!