11 Result(s)
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Witoon Prinyawiwatkul
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Article
Open AccessPerceived vulnerability to COVID-19 infection from event attendance: results from Louisiana, USA, two weeks preceding the national emergency declaration
Individual perceptions of personal and national threats posed by COVID-19 shaped initial response to the pandemic. The aim of this study was to investigate the changes in residents’ awareness about COVID-19 an...
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Article
Comparisons and correlations of phenolic profiles and anti-oxidant activities of seventeen varieties of pineapple
Major phenolic, β-carotene, and ascorbic acid (AA) contents in 17 pineapple varieties were quantified and compared. Anti-oxidant activities were evaluated using 2,2-Diphenyl-l-picrylhydrazyl (DPPH), 2,2’-Azino...
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Article
Determination of Melting Points, Specific Heat Capacity and Enthalpy of Catfish Visceral Oil During the Purification Process
Changes in melting points, enthalpy, and specific heat capacity of catfish visceral oil at each step of the purification process were studied. Melting points of −46.2 to 21.2 °C for crude oil, −45.9 to 11.5 °C...
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Article
FA composition of the oil extracted from farmed atlantic salmon (Salmo salar L.) viscera
The FA composition of visceral oil extracted from farmed Atlantic salmon (Salmo salar L.) viscera was studied. Seventeen FA were identified in the extracted visceral oil, and the major FA were 18∶1n9, 16∶0, 16∶1n...
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Article
Capabilities of different cooking oils in prevention of cholesterol oxidation during heating
The potential of various cooking oils to prevent cholesterol degradation and/or oxidation, as measured by the production of 7-ketocholesterol during heating at different temperatures, was studied using a chole...
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Article
Adsorption of FFA in crude catfish oil onto chitosan, activated carbon, and activated earth: A kinetics study
The feasibility of using chitosan, activated carbon, and activated earth to remove FFA from crude catfish visceral oil, and the adsorption kinetics of the procedure were evaluated. The effect of adsorbents on ...
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Article
Thermal degradation of FA and catfish and menhaden oils at different refining steps
The thermal degradation (weight loss) of individual FA and of catfish and menhaden oils collected from different refining steps was investigated by thermogravimetric analysis. The heat resistance of FA was par...
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Article
Effects of purification process on rheological properties of catfish oil
Effects of oil refining steps (degumming, neutralizing, bleaching, and deodorizing) on rheological properties of catfish oil were investigated. Four rheological models (Newtonian, Bingham, Herschel-Bulkley, an...
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Article
Oil production from catfish viscera
Oil was extracted from catfish viscera and purified (degummed, neutralized, bleached, and deodorized). The yield of catfish oil after purification was 65.7%. The major yield loss took place during the degummin...
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Article
Microwave-assisted catfish liver oil extraction and FA analysis
FA profiles of catfish liver oils were analyzed after microwave-assisted (without solvent extraction) and/or conventional (with solvent extraction) preparation methods. Microwave heating of the smaples was per...
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Article
FA composition of crude oil recovered from catfish viscera
The FA composition of crude catfish oil recovered from whole viscera, digestive tract, liver, gallbladder, and visceral storage fat was determined and compared with that of fillet and nugget (abdominal portion...
