Results 111 to 120 of about 4,932 (159)
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Carbon dioxide modified subcritical water chromatography
Journal of Chromatography A, 2008A novel method of increasing the elution strength in subcritical water chromatography (SWC) by adding CO2 to the water mobile phase is presented. Since the polarity of water reduces dramatically with increasing temperature, this property is used in SWC to create an isocratic mobile phase with tunable elutropic strength in reversed-phase separations ...
Michael O, Fogwill, Kevin B, Thurbide
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Phenanthrene degradation in subcritical water
Analytica Chimica Acta, 2006Subcritical water (
Yu Yang, Frank Hildebrand
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Subcritical water processing for nanopharmaceuticals
Chemical Engineering and Processing - Process Intensification, 2019Abstract Nanonization of poorly water-soluble drugs offers an efficient approach for enhancing the bioavailability of drugs where the solubility and dissolution rate are the main limitations. The solvent anti-solvent precipitation methods have been the most straightforward technique for producing ultrasmall drug nanoparticles with narrow size ...
Yuan Pu +4 more
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Characterization of the polarity of subcritical water
Journal of Chromatography A, 2017The polarity of subcritical water was studied solvatochromically with betaine dye (33) across a temperature range of 30°C-180°C and a pressure range of 13.8bar (200psi) to 124bar (1800psi). It was observed that temperature has a greater effect than pressure on the polarity of subcritical water.
Zahra M, Alghoul +2 more
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Kinetics of Maltooligosaccharide Hydrolysis in Subcritical Water
Journal of Agricultural and Food Chemistry, 2006The kinetics of the hydrolysis of maltooligosaccharides with a degree of polymerization (DP) of 3-6 in subcritical water was studied using a tubular reactor at temperatures between 200 and 260 degrees C and at a constant pressure of 10 MPa. The maltooligosaccharide disappearance and product formation at residence times shorter than 50 s could be ...
Shabnam Haghighat, Khajavi +3 more
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Decomposition Kinetics of Maltose in Subcritical Water
Bioscience, Biotechnology, and Biochemistry, 2004The decomposition process of maltose in subcritical water was studied using a tubular reactor in the temperature range of 180 to 260 degrees C and at 10 MPa. The formation of glucose and 5-hydroxymethyl-2-furaldehyde during the maltose decomposition was also observed. The decomposition rate of maltose was faster at higher temperatures.
Shabnam, Haghighat Khajavi +4 more
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Electrolysis of glycerol in subcritical water
Journal of Renewable and Sustainable Energy, 2009Recently, there has been a rising interest for the disposal of biorelated components that cannot be treated easily by biological processes. Because of the development of biodiesel production, the production of by-products such as crude glycerol has increased dramatically.
Asli Yuksel +3 more
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Polychlorinated biphenyls degradation in subcritical water
AIP Conference Proceedings, 2017In this work, the degradation of PCB-118, PCB-156, and PCB-180 congeners under subcritical conditions has been investigated. Stainless reaction vessels were used to carry out the heating of reaction mixtures. Liquid-liquid extraction of the reaction mixtures was conducted prior to GC analysis.
Ninad Doctor, Larry Yang, Yu Yang
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Subcritical and supercritical water oxidation for dye decomposition
Journal of Environmental Management, 2021The total annual output of synthetic dyes exceeds 7 × 105 tons. About 1,000 tons of non-biodegradable synthetic dyes are released every year into the natural streams and water sources from textile wastes. The release of these colored wastewater exerts negative impact on aquatic ecology and human beings because of the poisonous and carcinogenic ...
Rahat Javaid +4 more
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Subcritical Water Extraction of Biological Materials
Separation & Purification Reviews, 2016Extraction is a vital prerequisite in most scientific studies involving the isolation and analysis of compounds from biological/environmental systems. The use of large quantities of organic solvents in performing both conventional and modern methods of extraction of these substances stirs issues of safety, environmental concern and cost-effectiveness ...
Sefater Gbashi +4 more
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