Zobrazeno 1 - 10
of 33
pro vyhledávání: '"J.H. Vosjan"'
Autor:
J.H. Vosjan, K.M. Olańczuk-Neyman
Publikováno v:
Netherlands Journal of Sea Research. 28:221-225
This study describes the respiratory ETS-activity of surface water in an Antarctic coastal area and analyses the effect of temperature on the ETS-activity of organisms living in a consistently low-temperature regime. Secchi disk visibility, temperatu
Publikováno v:
Netherlands Journal of Sea Research. 25:501-511
In August 1984 and in February 1985 biomass as ATP, respiration rate as ETS activity and bacterial numbers were estimated in the upper 300 m water column of the eastern part of the Banda Sea and the northern Arafura Sea (Indonesia). In August, during
Publikováno v:
Netherlands Journal of Sea Research. 25:89-99
A watermass, on the Fladen Grounds, marked with a drifting buoy, was studied daily during one month in spring. Hydrographic parameters, nutrient regime, oxygen regime, biomass of microorganisms and respiratory activity were determined; the high varia
Publikováno v:
Netherlands Journal of Sea Research. 25:391-393
The effect of UV-B irradiation on the ATP content of natural assemblages of planktonic microorganisms in the upper 30-m water layer of the Weddell Sea (Antarctica) was studied. After five hours of irradiation with UV (290–320 nm) of 1.35 W·m −2
Publikováno v:
Netherlands Journal of Sea Research. 21:107-112
During the Antarctic winter expedition (ANT V/1) of the German R.V. “Polarstern” around Elephant Island and west of the Antarctic Peninsula in May–June 1986, two research groups measured ATP in the water column by different methods: boiling in
Autor:
J.H. Vosjan
Publikováno v:
Netherlands Journal of Sea Research. 8:208-213
Publikováno v:
Netherlands Journal of Sea Research. 11:14-23
The vertical distribution of organic C, sulphate-chlorinity ratio, sulphide concentration, oxygen consumption rate and ETS activity was studied over a column of 35 cm in sediments of a natural tidal flat and of a large artificial indoor tidal flat. B
Publikováno v:
Netherlands Journal of Sea Research. 11:1-13
A method is presented to measure respiratory electron transport system (ETS) activity in marine sediments. To prepare cell-extracts a mechanical Braun-Melsungen homogenizer, Model MSK, is used. The ETS assay procedure is carried out with NADH, NADPH
Autor:
G.J. Van der Hoek, J.H. Vosjan
Publikováno v:
Netherlands Journal of Sea Research. 5:440-444
The effects of the toxic metals Hg and Cu on the growth of Desulfovibrio in a continuous culture was studied. It appeared that in such a culture the metals are continually rendered harmless by the precipitation of metal suphides, while in batch cultu
Autor:
J.H. Vosjan
Publikováno v:
Netherlands Journal of Sea Research. 4:310-316
Porphyra umbilicalis accumulates the fission product yttrium-91 in six hours to a concentration factor of 288 ± 126. This accumulated yttrium may be easily removed to a large extent by washing with sea water to which EDTA has been added. This proves