This study was conducted to show impact of supercritical fluid extraction using pure SC-CO or SC-CO enriched by 2, 6, and 10% of acetone, simultaneously varied by the extraction time (1 vs. 5 h), on the quality of chia seed oils. Obtained oils were relatively similar in the fatty acid composition, but they differed in total content of phytochemicals (from 4956 to 6391 mg/kg of oil). Among them, three oils were the most different: oil extracted 1 h with pure SC-CO (the most abundant in squalene, sterols, and tocopherols), oil extracted 5 h with pure SC-CO (the poorest in squalene, polyphenols, and carotenoids, with medium level of sterols and tocopherols) and oil extracted 1 h with SC-CO enriched by 10% acetone (the most abundant in polyphenols and carotenoids). Such unique chia oils can be valuable for special market needs, such as cosmetics, pharmaceuticals, functional food or diet supplement production.
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http://dx.doi.org/10.1007/s10068-018-0316-2 | DOI Listing |
Nanoscale
December 2024
Department of Mechanical Engineering and Institute for Nano-Engineered Systems, University of Washington, Seattle, WA 98195, USA.
Reducing MOF particles to the nanoscale size range is beneficial due to their increased surface-to-volume ratio, higher defects exposing metals and ligands, and short diffusion path. While great efforts have been made to reduce the particle sizes by controlling the reaction kinetics or terminating the particle growth, large-scale, rapid synthesis of MOF nanoparticles (NPs) remains a challenge. Here, we report supercritical (sc) CO-assisted synthesis of HKUST-1 NPs in a continuous flow reactor, which yielded pure and thermally stable MOFs with median sizes of 110-250 nm and BET surface areas of 1610-1890 m g under 10 seconds synthesis time.
View Article and Find Full Text PDFInt J Mol Sci
September 2024
Department of Pharmaceutical Botany, Medical University of Lublin, ul. Chodźki 1, 20-093 Lublin, Poland.
Terpenes are plant secondary metabolites known for their anti-inflammatory and antioxidant activities. According to ethnobotanical knowledge, Sweet was used in traditional medicine against inflammation. The present study was conducted to determine the triterpene profile and antioxidant and anti-inflammatory activity of supercritical CO (SC-CO) extracts of Sweet flower (RLF).
View Article and Find Full Text PDFFood Res Int
February 2024
Laboratório de Alta Pressão em Engenharia de Alimentos (LAPEA), Faculdade de Engenharia de Alimentos (FEA), Universidade Estadual de Campinas (UNICAMP), 13083-862 Campinas, Brasil.
β-carotene, a natural dye renowned for its antioxidant and provitamin A activities, is hindered from direct use in food and drug products due to its susceptibility to oxidation, easy isomerization under light, heat, or acidic conditions, as well as its low water solubility and oral bioavailability. In this study, we addressed these challenges by loading β-carotene into corn starch aerogels via supercritical carbon dioxide (sc-CO) and assessed its loading contributions through adsorption during contact time and precipitation during depressurization. The loading process was studied under two cycles at pressure of 30 MPa, temperature of 40 °C, depressurization rate of 0.
View Article and Find Full Text PDFSmall
March 2024
College of Materials Science & Engineering, Zhengzhou University, Zhengzhou, 450052, P. R. China.
As a remarkable structure, 2D magnetic heterojunctions have attracted researchers' attention owing to their controlled manipulation in the electronic device. However, successful fabrication as well as modulation of their structure and compound remain challenging. Herein, a novel method is designed to obtain a CoCl /Co O heterojunction on Si/SiO substrate with the assistance of supercritical CO (SC CO ), and the as-fabricated sample has significantly increased coercivity and saturation magnetization, which is 11 times higher than pure Co O .
View Article and Find Full Text PDFPhys Chem Chem Phys
November 2022
College of Materials Science & Engineering, Zhengzhou University, Zhengzhou 450052, P. R. China.
Impregnating noble metals in metal-organic frameworks (MOFs) for obtaining effective catalysts for the photocatalytic process is of great significance but remains very challenging. Herein, for the first time, atomically dispersed Pt atoms were successfully impregated inside the MOF UiO-66 with the assistance of supercritical carbon dioxide (SC CO). Our study demonstrated that the SC CO-directed strategy makes Pt undergo a stable encapsulation inside UiO-66, realizing a stage for the rapid transfer of photogenerated electrons between the components of the composite, hence dramatically increasing the catalytic effect.
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