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Organophosphorus compounds. Part IX: Decomposition of ω-dimethylaminoalkyl methylphosphonofluoridates and isomerization of 2-dipropylaminoethyl methylphosphonofluoridothionate

Autor: G. R. van den Berg, G. W. Kraay, H. P. Benschop

Publikováno v: Recueil des Travaux Chimiques des Pays-Bas. 89:1025-1037

The decomposition product of 2-dimethylaminoethyl methylphosphonofluoridate (IV, n = 2) was identified as 1,1,4,4-tetramethylpiperazinium bis-(methylphosphonofluoridate) (VI). In hexadeuteriodimethyl sulfoxide (60°), the first-order rate of decompos

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::402864aa462ade0ecf17105b892add54
https://doi.org/10.1002/recl.19700891004

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Phytoplankton community structure derived from HPLC analysis of pigments in the Faroe-Shetland Channel during summer 1999: the distribution of taxonomic groups in relation to physical/chemical conditions in the photic zone

Autor: R. Riegman, G. W. Kraay

Publikováno v: Journal of Plankton Research. 23:191-205

A study of the phytoplankton community in the Faroe-Shetland Channel was conducted in July 1999. Samples were collected at various depths in the photic zone along three transects (the northern entrance, the center and the southern entrance). Except f

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4bd086be23c7dd14e2a4473fd17dd7da
https://doi.org/10.1093/plankt/23.2.191

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Trophic upgrading of food quality by protozoans enhancing copepod growth: role of essential lipids

Autor: W. C. M. Klein Breteler, G. W. Kraay, Marianne Baas, N. Schogt, Stefan Schouten

Publikováno v: Marine Biology. 135:191-198

Protozoa are known for their intermediary trophic role in transferring organic matter from small size planktonic particles to mesozooplankton. This study concentrates on the possible addition of biochemical value during this transfer, by new producti

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::bf9410f587ea4a8599051e706f7561ff
https://doi.org/10.1007/s002270050616

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Monsoonal differences in primary production in the eastern Banda Sea (Indonesia)

Autor: D. Setiapermana, W. W. C. Gieskes, A. Nontji, Sutomo, G. W. Kraay

Publikováno v: Netherlands Journal of Sea Research. 25:473-483

14C incorporation into phytoplankton of the eastern Banda Sea was registered during incubations of samples, both in situ and in an incubator equipped with blue filters. Light conditions throughout the euphotic zone were apparently simulated quite wel

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3538fb0b4948aafef7f8af8618187d40
https://doi.org/10.1016/0077-7579(90)90071-n

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Influence of physical and biological processes on the concentration of O2 and CO2 in the ice-covered Weddell Sea in the spring of 1988

Autor: Winfried W.C. Gieskes, Jean-Marie Bouquegneau, G. W. Kraay, A. M. Larsson

Publikováno v: Weddell Sea Ecology ISBN: 9783642775970

In October and November 1988, measurements of oxygen and total dissolved inorganic carbon (TCO2) concentrations were made in the northwestern Weddell Sea to the south and north of the marginal ice edge, in order to estimate the relative importance, r

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9bc8190f09d0f1e84e96fee68d726b94
https://doi.org/10.1007/978-3-642-77595-6_18

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Effect of enclosure in large plastic bags on diurnal change in oxygen concentration in tropical ocean water

Autor: W. W. C. Gieskes, G. W. Kraay

Publikováno v: Marine Biology. 70:99-104

From November 1980 to February 1981 the concentration of oxygen dissolved in the surface mixed layer of the oligotrophic Caribbean Sea off Curacao was quite constant (420.77±1.98 μg at l-1). However, immediately following enclosure in 4500-1 plasti

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e83cab1f0b66a9c062f426211f32d74e
https://doi.org/10.1007/bf00397300

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Analysis of phytoplankton pigments by HPLC before, during and after mass occurrence of the microflagellate Corymbellus aureus during the spring bloom in the open northern North Sea in 1983

Autor: G. W. Kraay, W. W. Gieskes

Publikováno v: Marine Biology. 92:45-52

Daily observations in April and May 1983 near a subsurface drifter launched in the Fladen Grounds area of the North Sea revealed that a large crop of the microflagellate Corymbellus aureus Green, producing up to 3 g C m-2 d-1, succeeded the diatoms d

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3e791a9e271f5ce1632d41ff24b0d619
https://doi.org/10.1007/bf00392744

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Dominance of Cryptophyceae during the phytoplankton spring bloom in the central North Sea detected by HPLC analysis of pigments

Autor: G. W. Kraay, W. W. C. Gieskes

Publikováno v: Marine Biology. 75:179-185

Microscopic observations of Lugol-preserved samples collected near a subsurface drogue during the spring bloom of 1981 in the central North Sea suggested that the phytoplankton crop consisted mainly of diatoms. However, the relative abundance of allo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7c59747358e0204a446aef78ccaaa03e
https://doi.org/10.1007/bf00406000

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