A. Hopia

Publications126
h-index30
Citations9,216
Highly Influential Citations332
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Antioxidant activity of plant extracts containing phenolic compounds.
The antioxidative activity of a total of 92 phenolic extracts from edible and nonedible plant materials (berries, fruits, vegetables, herbs, cereals, tree materials, plant sprouts, and seeds) was… Expand
Berry phenolics and their antioxidant activity.
Phenolic profiles of a total of 26 berry samples, together with 2 apple samples, were analyzed without hydrolysis of glycosides with HPLC. The phenolic contents among different berry genera varied… Expand
Antimicrobial effects of Finnish plant extracts containing flavonoids and other phenolic compounds.
Plant phenolics, especially dietary flavonoids, are currently of growing interest owing to their supposed functional properties in promoting human health. Antimicrobial screening of 13 phenolic… Expand
Antimicrobial properties of phenolic compounds from berries
Aims: To investigate the antimicrobial properties of phenolic compounds present in Finnish berries against probiotic bacteria and other intestinal bacteria, including pathogenic species.
Processing of rapeseed oil: effects on sinapic acid derivative content and oxidative stability
Rapeseed oil is usually expelled from the seed at high temperatures. Refining removes most of the non-triacylglycerol components, including many sinapic acid derivatives typical for rapeseed. The… Expand
Oxidative stability and minor constituents of virgin olive oil and cold-pressed rapeseed oil
Abstract. The oxidative stability and minor constituents of three cold-pressed low erucic acid rapeseed oils and three virgin olive oils were compared. The rapeseed oils were more easily oxidized, in… Expand
Antioxidant activity and partitioning of phenolic acids in bulk and emulsified methyl linoleate.
To evaluate the effect of colloidal parameters on the activity of natural antioxidants, the effect of selected phenolic acids on both bulk and emulsified methyl linoleate oxidation (in the dark at 40… Expand
Flavonoids quercetin, myricetin, kaemferol and (+)-catechin as antioxidants in methyl linoleate
The antioxidant effect of the flavonoids quercetin, myricetin, kaemferol, (+)-catechin and rutin on methyl linoleate oxidation was investigated. In addition, the synergistic effects of flavonoids and… Expand
Margarines, butter and vegetable oils as sources of polycyclic aromatic hydrocarbons
Concentrations of polycyclic aromatic hydrocarbons (PAH) were determined in Finnish butter, margarines and vegetable oils and their raw materials. In all the samples some degree of PAH contamination… Expand
Investigation of plant extracts for the protection of processed foods against lipid oxidation. Comparison of antioxidant assays based on radical scavenging, lipid oxidation and analysis of the…
Abstract Antioxidant activities of plant extracts from spices, coffee, tea, grape skin, and tomato peel slurry were evaluated using a number of analytical methods including the quantification of… Expand
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