A. Stewart

Publications48
h-index18
Citations6,703
Highly Influential Citations293
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Overexpression of a transporter gene in a multidrug-resistant human lung cancer cell line.
The doxorubicin-selected lung cancer cell line H69AR is resistant to many chemotherapeutic agents. However, like most tumor samples from individuals with this disease, it does not overexpress… Expand
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A review of recent studies on malondialdehyde as toxic molecule and biological marker of oxidative stress.
AIM Of the many biological targets of oxidative stress, lipids are the most involved class of biomolecules. Lipid oxidation gives rise to a number of secondary products. Malondialdehyde (MDA) is the… Expand
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The TRANSPARENT TESTA16 Locus Encodes the ARABIDOPSIS BSISTER MADS Domain Protein and Is Required for Proper Development and Pigmentation of the Seed Coat Article, publication date, and citation…
Screening for seed pigmentation phenotypes in Arabidopsis led to the isolation of three allelic yellow-seeded mutants, which defined the novel TRANSPARENT TESTA16 (TT16) locus. Cloning of TT16 was… Expand
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HPLC-MSn analysis of phenolic compounds and purine alkaloids in green and black tea.
Tea is a complex mixture containing a range of compounds from simple phenolics to complex thearubigins, many of which have well-recognized antioxidant properties. This paper describes the application… Expand
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Occurrence of flavonols in tomatoes and tomato-based products.
The flavonol contents of 20 varieties of tomato fruit were investigated in relation to variety, size, season, and country of origin. Ten commonly consumed tomato-based food products were also… Expand
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The effect of nitrogen and phosphorus deficiency on flavonol accumulation in plant tissues
The flavonol content of Arabidopsis thaliana and tomato seedlings was assessed in conditions of reduced nitrogen or phosphorus availability. In both systems, a significant inverse relationship was… Expand
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On-line high-performance liquid chromatography analysis of the antioxidant activity of phenolic compounds in green and black tea.
Teas represent a rich source of dietary antioxidants. This paper describes analysis of the antioxidant potential of individual tea phenolics using an on-line high-performance liquid chromatography… Expand
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Effect of freezing and storage on the phenolics, ellagitannins, flavonoids, and antioxidant capacity of red raspberries.
Scottish-grown red raspberries are a rich source of vitamin C and phenolics, most notably, the anthocyanins cyanidin-3-sophoroside, cyanidin-3-(2(G)-glucosylrutinoside), and cyanidin-3-glucoside, and… Expand
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Flavonoid metabolites in human plasma and urine after the consumption of red onions: analysis by liquid chromatography with photodiode array and full scan tandem mass spectrometric detection.
Blood was collected from six human volunteers 1 h after the ingestion of lightly fried red onions, which are rich in anthocyanins and flavonols. Urine excreted 0-4 h after ingestion was also… Expand
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Chlorogenic acids in coffee - absorption and excretion by human volunteers.
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