Výsledky vyhledávání - "Paul J. Janknegt"

Akademický článek

Oxidative stress and enzymatic scavenging of superoxide radicals induced by solar UV-B radiation in Ulva canopies from southern Spain

Autor: Kai Bischof, Paul J. Janknegt, Anita G.J. Buma, Jan W. Rijstenbil, Gloria Peralta, Anneke M. Breeman

Publikováno v: Scientia Marina, Vol 67, Iss 3, Pp 353-359 (2003)

The generation of reactive oxygen species (ROS) and scavenging of the superoxide radical by superoxide dismutase (SOD) was studied in mat-like canopies of the green macroalga Ulva rotundata Bliding in a tidal brine pond system in southern Spain. Arti

Externí odkaz: https://doaj.org/article/3fb53d1459cd46f1a95405c83aba102f

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OXIDATIVE STRESS RESPONSES IN THE MARINE ANTARCTIC DIATOM CHAETOCEROS BREVIS (BACILLARIOPHYCEAE) DURING PHOTOACCLIMATION(1)

Autor: Paul J. Janknegt, Anita G. J. Buma, Willem H. van de Poll, Jan W. Rijstenbil, Ronald J. W. Visser

Publikováno v: Journal of phycology. 44(4)

The enzyme superoxide dismutase (SOD) holds a key position in the microalgal antioxidant network. The present research focused on oxidative stress responses in the Antarctic diatom Chaetoceros brevis F. Schutt during transition to excess (including u

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::52d39e43d0c6c183d2c84182eec3cb14
https://pubmed.ncbi.nlm.nih.gov/27041614

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Excessive irradiance and antioxidant responses of an Antarctic marine diatom exposed to iron limitation and to dynamic irradiance

Autor: Anita G. J. Buma, Paul J. Janknegt, Ronald J. W. Visser, Willem H. van de Poll, M. A. van Leeuwe

Publikováno v: Journal of Photochemistry and Photobiology B: Biology, 94(1), 32-37. ELSEVIER SCIENCE SA

The synergistic effects of iron limitation and irradiance dynamics on growth, photosynthesis, antioxidant activity and excessive PAR (400-700 nm) and UV (280-400 nm) sensitivity were investigated for the Antarctic marine diatom Chaetoceros brevis. Ir

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b340122aeb2887e3ccb4239e75f9b3a1
https://doi.org/10.1016/j.jphotobiol.2008.09.003

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A comparison of quantitative and qualitative superoxide dismutase assays for application to low temperature microalgae

Autor: T. S. Gechev, van de Willem Poll, Paul J. Janknegt, Anita G. J. Buma, Jan W. Rijstenbil

Publikováno v: Journal of Photochemistry and Photobiology B: Biology, 87(3), 218-226. ELSEVIER SCIENCE SA
Journal of Photochemistry and Photobiology B: Biology, 87(3), 218-226. Elsevier B.V.

Antioxidant enzymes such as superoxide dismutase (SOD) play a key role in the removal of reactive oxygen species produced during visible and ultraviolet irradiance stress in microalgae and plants. However, little is known about the enzymatic antioxid

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f2b68c192fbafc23d085478fabea1c7d
https://hdl.handle.net/20.500.11755/2533c349-9cb4-4a03-9823-f6933c75a86b

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Photoacclimation modulates excessive photosynthetically active and ultraviolet radiation effects in a temperate and an Antarctic marine diatom

Autor: Anne-Carlijn Alderkamp, Paul J. Janknegt, Willem H. van de Poll, Anita G. J. Buma, J Roggeveld

Publikováno v: Limnology and Oceanography. 51:1239-1248

The influence of photoacclimation on the effects of excessive photosynthetically active (PAR; 400-700 nm) and ultraviolet (UVR; 280-400 nm) radiation was assessed for the marine diatoms Thalassiosira weissflogii (Grunow) Fryxell and Hasle and Thalass

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9cebfd959c25b5802508cb4385259e22
https://doi.org/10.4319/lo.2006.51.3.1239

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Short-term antioxidative responses of 15 microalgae exposed to excessive irradiance including ultraviolet radiation

Autor: Anita G. J. Buma, C. Marco de Graaff, Ronald J. W. Visser, Jan W. Rijstenbil, Willem H. van de Poll, Paul J. Janknegt

Publikováno v: European Journal of Phycology, 44(4), 525-539

Short-term photosensitivity and oxidative stress responses were compared for three groups of marine microalgae: Antarctic microalgae, temperate diatoms and temperate flagellates. In total, 15 low-light-acclimated species were exposed to simulated sur

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ef8b81a6608eb8bd22ac8737b92d35fc
https://research.rug.nl/en/publications/759c5a9d-5f0b-4c88-885c-dff9d2f8bd10

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Wavelength-dependent xanthophyll cycle activity in marine microalgae exposed to natural ultraviolet radiation

Autor: Ronald J. W. Visser, Paul J. Janknegt, Anita G. J. Buma, E. Walter Helbling, Virginia E. Villafañe, Willem H. van de Poll

Publikováno v: European Journal of Phycology, 44(4), 515-524

The wavelength dependency of xanthophyll cycling in two marine microalgae (Thalassiosira weissflogii and Dunaliella tertiolecta) was studied by establishing biological weighting functions (BWFs) during exposure to natural ultraviolet radiation. High-

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::05fb6558f819d19bdfb2310f413987f7
https://research.rug.nl/en/publications/4779b544-1cbf-4500-a12e-bd7afdc49e2c

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Antioxidative responses of two marine microalgae during acclimation to static and fluctuating natural UV radiation

Autor: Willem H. van de Poll, Anita G. J. Buma, E. Walter Helbling, C. Marco de Graaff, Ronald J. W. Visser, Paul J. Janknegt

Publikováno v: Photochemistry and Photobiology, 85(6), 1336-1345. Wiley-Blackwell

Photoacclimation properties were investigated in two marine microalgae exposed to four ambient irradiance conditions: static photosynthetically active radiation (PAR: 400–700 nm), static PAR + UVR (280–700 nm), dynamic PAR and dynamic PAR + UVR.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e53d6f63561564577cb3939eb8bf9079
https://hdl.handle.net/11370/dfbe29a7-b8c1-4313-870e-83ed6e663049

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UVR-induced photoinhibition of summer marine phytoplankton communities from Patagonia

Autor: Paul J. Janknegt, Virginia E. Villafañe, E. Walter Helbling, Anita G. J. Buma, Willem H. van de Poll, Marco de Graaff, Ronald J. W. Visser

Publikováno v: Marine Biology, 154(6), 1021-1029. SPRINGER HEIDELBERG

During austral summer 2006, experiments were carried out to evaluate the effects of ultraviolet radiation (UVR, 280-400 nm) on carbon fixation of natural phytoplankton assemblages from Patagonia (Argentina). Surface water samples were collected (ca.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c3470033b6d7871845de9a94ae3438e9
https://research.rug.nl/en/publications/053a712f-5a88-43e5-8a5d-fd7700502a73

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