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1
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Rozwój i ekonomia suszenia produktów rolnych gorącym powietrzem w Niemieckiej Republice demokratycznej

100%
Schneider B.
Zeszyty Problemowe Postępów Nauk Rolniczych
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1974
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tom 147
2
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PO4 release at the sediment surface under anoxic conditions: a contribution to the eutrophication of the Baltic Sea?

100%
Schneider B.
Oceanologia
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2011
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tom 53
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nr (1-TI)
The vertical profiles of phosphate, total CO2 and oxygen/hydrogen sulphide were determined in the deep water of the Gotland Sea during March 2003 to July 2006 with a temporal resolution of 2–3 months. This time span included the shift from anoxic to oxic conditions resulting from a water renewal event, as well as the transition back to anoxic waters during the subsequent two-year stagnation period. The data from depths below 150 m were used to identify and quantify phosphate release and removal processes. The relationship between the total CO2 generated by mineralization (CT1 min) and the PO4 concentrations indicated that the initial decrease in the phosphate concentrations after the inflow of oxygen-rich water was mainly a dilution effect. Only about one third of the PO4 removal was a consequence of the precipitation of insoluble iron-3-hydroxo-phosphates (Fe-P), which occurred slowly at the sediment surface under oxic conditions. From the CT1 min/PO4 ratios it was also concluded that the formation of Fe-P was reversed during the later phase of the stagnation, when the redoxcline approached a depth of 150 m. A phosphate mass balance was performed for four deep water sub-layers in order to quantify the dissolution of Fe-P during the stagnation period and thus to estimate the amount of Fe-P deposited during the last inflow of oxygen-rich water. A value of about 50 mmol-P m−2 was found, which refers to the specific biogeochemical conditions during the change from anoxic to oxic conditions that preceded the stagnation period.
3

Immunomodulation of polyamine biosynthesis in tobacco plants has a significant impact on polyamine levels and generates a dwarf phenotype

51%
Nolke G., Schneider B., Fischer R., Schillberg S.
Acta Physiologiae Plantarum
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2004
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tom 26
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nr 3 suppl.
4
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Processes regulating pCO2 in the surface waters of the Central Eastern Gotland Sea: a model study

51%
Kuznetsov I., Neumann T., Schneider B., Yakushev E.
Oceanologia
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2011
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tom 53
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nr 3
This work presents a one-dimensional simulation of the seasonal changes in CO2 partial pressure (pCO2). The results of the model were constrained using data from observations, which improved the model’s ability to estimate nitrogen fixation in the central Baltic Sea and allowed the impact of nitrogen fixation on the ecological state of the Baltic Sea to be studied. The model used here is the public domain water-column model GOTM (General Ocean Turbulence Model), which in this study was coupled with a modifed Baltic Sea ecosystem model, ERGOM (The Baltic Sea Research Institute’s ecosystem model). To estimate nitrogen fixation rates in the Gotland Sea, the ERGOM model was modified by including an additional cyanobacteria group able to fix nitrogen from March to June. Furthermore, the model was extended by a simple CO2 cycle. Variable C:P and N:P ratios, controlled by phosphate concentrations in ambient water, were used to represent cyanobacteria, detritus and sediment detritus. This approach improved the model’s ability to reproduce sea-surface phosphate and pCO2 dynamics. The resulting nitrogen fixation rates in 2005 for the two simulations, with and without the additional cyanobacteria group, were 259 and 278 mmol N m−2 year−1 respectively.
5
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Sources of particulate selenium in the Baltic Sea atmosphere

51%
Dudzinska-Huczuk B., Schneider B., Bolalek J.
Oceanologia
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2000
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tom 42
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nr 3
To determine the atmospheric concentrations and size distributions of particulate selenium (Se), aerosols were collected by air filtration and impactor sampling at the Kap Arkona coastal weather station on the Island of R¨ugen.T otal reflection X-ray fluorescence analysis was used to determine Se and numerous other elements as well.The dependence of the Se concentration on the wind direction and the results of a regression analysis indicated that Se associated with sub-micron particles is mainly derived from anthropogenic sources.The pronounced relationship between Se and Cu indicated that copper smelting is a major source of atmospheric selenium. A marine Se contribution was identified for particles larger than 2 μm.
6

High reactivity of anti-HIV nucleotide D4T with nucleoside diphosphate kinase at the molecular level

39%
Schneider B., Biondi R., Sarfati R., Guerreiro C., Deville-Bonne D., Veron M.
Cellular and Molecular Biology Letters
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1999
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tom 04
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nr 3
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