K
Kalevi Pihlaja
Researcher at University of Turku
Publications - 450
Citations - 15234
Kalevi Pihlaja is an academic researcher from University of Turku. The author has contributed to research in topics: Mass spectrum & Electron ionization. The author has an hindex of 49, co-authored 450 publications receiving 14411 citations. Previous affiliations of Kalevi Pihlaja include University of Helsinki.
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Antioxidant activity of plant extracts containing phenolic compounds
Marja P Kähkönen,Anu Hopia,Heikki Vuorela,Jussi-Pekka Rauha,Kalevi Pihlaja,Tytti S. Kujala,Marina Heinonen +6 more
TL;DR: 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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Antimicrobial effects of Finnish plant extracts containing flavonoids and other phenolic compounds
Jussi-Pekka Rauha,Susanna Remes,Marina Heinonen,Anu Hopia,Marja P Kähkönen,Tytti S. Kujala,Kalevi Pihlaja,Heikki Vuorela,Pia Vuorela +8 more
TL;DR: Flavone, quercetin and naringenin were effective in inhibiting the growth of the organisms and purple loosestrife was the most active plant extracts against gram-positive Staphylococcus aureus.
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Molecular size distribution and spectroscopic properties of aquatic humic substances
Juhani Peuravuori,Kalevi Pihlaja +1 more
TL;DR: In this article, the number and weight-averaged molecular weights of different isolated humic fractions and organic matter from natural water samples were measured using high-performance size-exclusion chromatography (HPSEC).
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Phenolics and betacyanins in red beetroot (Beta vulgaris) root: distribution and effect of cold storage on the content of total phenolics and three individual compounds.
TL;DR: The distribution of total phenolics and main betacyanins in red beetroot (Beta vulgaris) root was determined, and tentative identifications of betanidin and feruloylamaranthin were made.
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Inhibition of cancer cell growth by crude extract and the phenolics of Terminalia chebula retz. fruit
TL;DR: Flow cytometry and other analyses showed that some apoptosis was induced by the extract at lower concentrations, but at higher concentrations, necrosis was the major mechanism of cell death, and the most growth inhibitory phenolics of T. chebula fruit in the authors' study.