Zobrazeno 1 - 10
of 13
pro vyhledávání: '"Wai-Yuen Chung"'
Publikováno v:
Food additivescontaminants. Part B, Surveillance. 3(3)
The objective of the present study was to assess synthetic colours in common snack foods consumed by children and the accuracy of labelling. Dietary exposure to synthetic colours was estimated using food frequency questionnaire data obtained from pri
Publikováno v:
Clinical Biochemistry. 34:623-627
Aims: To compare plasma ascorbic acid results by the colorimetric FRASC (Ferric Reducing/Antioxidant and Ascorbic Acid) assay and a reference HPLC method; to re-examine plasma ascorbic acid stability, and anticoagulant effect. Design and methods: For
Autor:
Iris F.F. Benzie, Wai Yuen Chung
Publikováno v:
Cytometry. 40:182-188
Background Probe-assisted flow cytometry was used to monitor the response of membranes of living cells to oxidant stress in the presence and absence of antioxidants. Test conditions (fluorophore loading, oxidant concentration) were investigated and s
Publikováno v:
Clinical Chemistry. 45:901-904
In humans, allantoin is formed by nonenzymatic oxidation of urate; it may, therefore, be useful in assessing oxidative stress(1)(2). Most published methods involve separate analysis of urate and allantoin and require extraction, hydrolysis, and deriv
Autor:
Iris F.F. Benzie, Wai-Yuen Chung
Publikováno v:
Clinica chimica acta; international journal of clinical chemistry. 424
Allantoin in human plasma is a specific biomarker of oxidative stress. We describe a sensitive method to measure plasma allantoin using isocratic liquid chromatography and mass spectrometry (LC-MS/MS).Direct injection of deproteinized plasma into the
Publikováno v:
The British journal of nutrition. 109(12)
Green tea (Camellia sinensis) catechin profiles in plasma and urine following single dosing and regular ingestion of green tea are not clear. We performed a placebo-controlled intervention study with sixteen healthy volunteers to determine changes in
Publikováno v:
Clinica chimica acta; international journal of clinical chemistry. 411(5-6)
Urine 8-oxo-7,8-dihydro-2'-deoxyguanosine (8-oxodG) is a specific biomarker of oxidative stress. We evaluated a modified LC-MS/MS assay for urine 8-oxodG and determined biological variation in healthy adults.Untreated urine was injected into an isocr
Autor:
Iris F.F. Benzie, Wai-Yuen Chung
Publikováno v:
Annals of Clinical Biochemistry: International Journal of Laboratory Medicine. 36:104-106
Publikováno v:
The British journal of nutrition. 93(1)
Age-related macular degeneration (AMD) is a common disorder that causes irreversible loss of central vision. Increased intake of foods containing zeaxanthin may be effective in preventing AMD because the macula accumulates zeaxanthin and lutein, oxyg
Publikováno v:
Optometry and vision science : official publication of the American Academy of Optometry. 80(9)
BACKGROUND: Tear ascorbate is important for corneal health. A rapid and simple method for measurement of ascorbate in tears is needed, and adequate knowledge of physiological variation of tear ascorbate is important to facilitate comparative studies