Jyrki Loponen

University of Turku — Finland

Medicine · Health Sciences

26h-index3.1kcitations46works0.02yr avg
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Research Topics

Phytochemicals and Antioxidant Activities(9), Plant biochemistry and biosynthesis(8), Natural product bioactivities and synthesis(7), Soil Carbon and Nitrogen Dynamics(4), Plant responses to elevated CO2(4)

Publications46 total

Variation of Phlorotannins Among Three Populations of Fucus vesiculosus as Revealed by HPLC and Colorimetric Quantification
Journal of Chemical Ecology·2007· 81 cited
Phenolic compounds and terpenes in soil organic horizon layers under silver birch, Norway spruce and Scots pine
Biology and Fertility of Soils·2007· 125 cited
High‐performance liquid chromatographic analysis of phlorotannins from the brown alga <i>Fucus Vesiculosus</i>
Phytochemical Analysis·2007· 160 cited
Reversed‐phase HPLC‐ESI/MS analysis of birch leaf proanthocyanidins after their acidic degradation in the presence of nucleophiles
Phytochemical Analysis·2007· 62 cited
Macroalgal Communities Face the Challenge of Changing Biotic Interactions: Review with Focus on the Baltic Sea
AMBIO·2007· 60 cited
Effects of Elevated Carbon Dioxide and Ozone on Foliar Proanthocyanidins in Betula platyphylla, Betula ermanii, and Fagus crenata Seedlings
Journal of Chemical Ecology·2006· 21 cited
Quantitative analysis of polymeric proanthocyanidins in birch leaves with normal‐phase HPLC
Phytochemical Analysis·2006· 39 cited
Response of soil C and N transformations to tannin fractions originating from Scots pine and Norway spruce needles
Soil Biology and Biochemistry·2006· 79 cited
Organic matter characteristics and C and N transformations in the humus layer under two tree species, Betula pendula and Picea abies
Soil Biology and Biochemistry·2005· 100 cited
Analysis of proanthocyanidins in forest floor under different tree species
Jukuri (Natural Resources Institute Finland (Luke))·2005· 2 cited
CONTENTS OF SOLUBLE, CELL-WALL-BOUND AND EXUDED PHLOROTANNINS IN THE BROWN ALGA Fucus vesiculosus, WITH IMPLICATIONS ON THEIR ECOLOGICAL FUNCTIONS
Journal of Chemical Ecology·2005· 353 cited
Phenolic Extractives from the Bark of <i>Pinus sylvestris </i>L. and Their Effects on Inflammatory Mediators Nitric Oxide and Prostaglandin E<sub>2</sub>
Journal of Agricultural and Food Chemistry·2004· 100 cited
Analysis of procyanidins in pine bark with reversed-phase and normal-phase high-performance liquid chromatography–electrospray ionization mass spectrometry
Analytica Chimica Acta·2004· 144 cited
The structural and conformational analyses and antioxidant activities of chebulinic acid and its thrice-hydrolyzed derivative, 2,4-chebuloyl-β-D-glucopyranoside, isolated from the fruit of Terminalia chebula
ARKIVOC·2004· 37 citedOpen Access
Determination of proanthocyanidins in forest floor under different tree species. In: Polyphenols Communications, XXII International Conference on Polyphenols. Hoikkala, A. & Soidinsalo, O. (eds.). Secretariat du Groupe Polyphenols
2004
Microbial activities and characteristics of organic matter in soil under birch and conifers
Jukuri (Natural Resources Institute Finland (Luke))·2004
Betalain and phenolic compositions of four beetroot ( Beta vulgaris ) cultivars
European Food Research and Technology·2002· 234 cited
Biodegradation of dimethylphenols by bacteria with different ring-cleavage pathways of phenolic compounds
Environmental Science and Pollution Research·2002· 13 cited
5,5′,6,6′-Tetrahydroxy-3,3′-biindolyl from Beetroot (Beta vulgaris) Peel Extract
Zeitschrift für Naturforschung C·2001· 22 citedOpen Access
Patterns in content of phenolic compounds in leaves of mountain birches along a strong pollution gradient
Chemosphere·2001· 60 cited
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Frequent Co-authors

Kalevi Pihlaja(20), Erkki K. Euranto(14), Tore Pettersson(14), Vladimir Ossipov(13), Erkki Haukioja(9), Maarit Karonen(6), Veikko Kitunen(6), Aino Smolander(6), Erik B. Pedersen(6), Karel D. Klika(5), Marjo H. Halme(5), Tytti Kujala(4), Riitta Koivikko(4), Veijo Jormalainen(4), Svetlana Ossipova(4), Sanna Kanerva(3), Jari Sinkkonen(3), Kurt Torssell(3), Tuija Honkanen(2), Maarit Vienola(2)