In many areas of the life sciences it is becoming increasingly important to analyze living cells individually in order to explore the significance of cell heterogeneity, the phenotypic differences ...between genetically identical cells and the influence of variations in the cell cycle for cell biological studies. Therefore, different methods have been published to show tools to separate, sort and manipulate single cells which could accelerate research in the life sciences towards single cell resolution. Microfluidic large scale integration (mLSI) is one of the well-known plattforms for single-cell research that has been developed since 2002 1 and optimized by many researchers in recent years 2. However, the main issue with mLSI is that the external pressure sources are rather bulky and inconvenient to operate due to their huge size and complex structure, which hampers the uptake of this technology in Point-of-care (POC) applications Here, we present a small size and low power Digital Hydraulic Drive (DHD) intended for use in miniaturized and portable control systems for mLSI chips. The main components of a DHD are a pneumatic cylinder and a shape memory alloy (SMA) actuator 3. Depending on different types of SMA actuators, the DHD is not only able to provide digital hydraulic pulses (switching time smaller than 1 s), but can maintain a steady state up to 24 hours. A single DHD enables to control 256 mLSI valves in parallel.
In the framework of the second Swiss forest soil inventory, super(1) super(3) super(7) Cs-activity from 172 sites was measured systematically for the first time in the topmost soil layer (0-5 cm) and ...represented on a map. The spatial distribution of super(1) super(3) super(7) Cs contamination was similar to the pattern observed in 1986 from dose equivalent measurements following the Chernobyl nuclear power plant accident. Forest soils from regions with high precipitation in 1986 showed a higher super(1) super(3) super(7) Cs activity than regions with low precipitation. At sites with high caesium activities it was possible to discriminate between super(1) super(3) super(7) Cs originating from global fallout of the fifties and sixties and super(1) super(3) super(7) Cs from the Chernobyl accident. The results indicate that radiocaesium persists in the top soil layers and is recycled in forest ecosystems.
In the framework of the second Swiss forest soil inventory, super(137)Cs-activity from 172 sites was measured systematically for the first time in the topmost soil layer (0-5 cm) and represented on a ...map. The spatial distribution of super(137)Cs contamination was similar to the pattern observed in 1986 from dose equivalent measurements following the Chernobyl nuclear power plant accident. Forest soils from regions with high precipitation in 1986 showed a higher super(137)Cs activity than regions with low precipitation. At sites with high caesium activities it was possible to discriminate between super(137)Cs originating from global fallout of the fifties and sixties and super(137)Cs from the Chernobyl accident. The results indicate that radiocaesium persists in the top soil layers and is recycled in forest ecosystems.
Provider: - Institution: - Data provided by Europeana Collections- Stuttgart, Universität Stuttgart, Diplomarbeit- All metadata published by Europeana are available free of restriction under the ...Creative Commons CC0 1.0 Universal Public Domain Dedication. However, Europeana requests that you actively acknowledge and give attribution to all metadata sources including Europeana
Provider: - Institution: - Data provided by Europeana Collections- Mainz, Univ., Diss., 2007- All metadata published by Europeana are available free of restriction under the Creative Commons CC0 1.0 ...Universal Public Domain Dedication. However, Europeana requests that you actively acknowledge and give attribution to all metadata sources including Europeana
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