A. Hopia

Publications132
h-index31
Citations10,057
Highly Influential Citations349
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Antioxidant activity of plant extracts containing phenolic compounds.
TLDR
High activities were found in tree materials, especially in willow bark, spruce needles, pine bark and cork, and birch phloem, and in some medicinal plants including heather, bog-rosemary, willow herb, and meadowsweet and potato peel and beetroot peel extracts showed strong antioxidant effects.
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Berry phenolics and their antioxidant activity.
TLDR
The extraction method affected remarkably both the phenolic composition and the antioxidant activity, but with statistical analysis the observed activity could not be well explained with the contents of individual phenolic subgroups.
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Antimicrobial effects of Finnish plant extracts containing flavonoids and other phenolic compounds.
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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.
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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…
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Antioxidant activity and partitioning of phenolic acids in bulk and emulsified methyl linoleate.
TLDR
This study showed the system- and concentration-dependent antioxidant activity of phenolic acids, and the proportion of the antioxidant solubilized in the lipid phase and particularly in the interface did not necessarily reflect the efficiency of the antioxidants.
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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…
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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…
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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…
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Effects of laccase, xylanase and their combination on the rheological properties of wheat doughs
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