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| CROZIER,ALAN; BURNS,JENNIFER; AZIZ,AZLINA A; STEWART,AMANDA J; RABIASZ,HELENA S; JENKINS,GARETH I; EDWARDS,CHRISTINE A; LEAN,MICHAEL EJ. |
| Flavonols are polyphenolic secondary plant metabolites that are present in varying levels in commonly consumed fruits, vegetables and beverages. Flavonols have long held an interest for nutritionists, which has increased following a Dutch study in the early 1990s showing that dietary intake of flavonols was inversely correlated with the incidence of coronary heart disease. The main factors that have hindered workers in the field of flavonol research are (i) the accurate measurement of these compounds in foods and biological samples, and (ii) a dearth of information on their absorption and metabolism. This review aims to highlight the work of the authors in attempting to clarify the situation. The sensitive and selective HPLC procedure to identify and... |
| Tipo: Journal article |
Palavras-chave: Bioavailability; Dietary antioxidants; Flavones; Flavonols; HPLC analysis. |
| Ano: 2000 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602000000200007 |
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| Montiel-Montoya,Jorge; Valdez-Morales,Maribel; Reyes,Cesar; Barrales-Cureño,Hebert Jair. |
| ABSTRACT: Two chemical treatments, five enzymatic (pectinase, lipase, hemicellulase, hemicellulose-cellulase or lipase-pectinase) and one microbiological (Bacillus subtilis) treatment were evaluated to obtain glucosamine hydrochloride (Gluc-HCl) from the chitin obtained from crab (Callinectes bellicosus) exoskeletons. Chemical treatments were referred as Method A (HCl hydrolysis during 75 min at 90°C) and Method B (HCl hydrolysis during 20 min and 14 h of rest). Glucosamine and, in some cases, N-acetyl-D-glucosamine were identified and quantified by HPLC. Treatments with the greater concentrations of Gluc-HCl in descending order were: lipase (94.4 mg/g), microbiological (45.7 mg/g), lipase-pectinase (22.9 mg/g), hemicellulase-cellulase (20.9 mg/g),... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Callinectes bellicosus; Extraction methods; Glucosamine hydrochloride; HPLC analysis. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000900752 |
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