摘要:
Water sampling devices (1) comprising multiple separate sample containers (4) with inlet and outlet valves (23, 25) are used in all types of bodies of water. Water flows through the sample container (4) by means of the movement of the device or by means of a current, and once the water has been sampled, the sample container is closed. Afterwards, the next sample container (4) can be selected. The water sampling device (1) according to the invention has lower construction costs, weighs less and requires less maintenance, and also improves manageability and reliability. Said device is characterized by the following: a mounting frame (2) comprising two end plates (7) between which the cylinder magazine (3) is rotatably mounted; fastening devices of the sample containers (4) comprising positively engaging plug connections to the cylinder magazine (3) and force-fit clamping connections between the end plates (7) of the mounting frame (2); conical openings (27) in the end faces of the sample containers (4) and corresponding form-fitting sealing cones (28) as inlet and outlet valves (23, 25) which form symmetrical annular gaps (37) in an opened state; actuating devices (54) comprising catch hooks (50) on the sealing cones (28) and triggering levers (40) in the end plates (7) of the mounting frame (2); and a selection device (5) comprising a motor (8) with gears between the mounting frame (2) and the cylinder magazine (3).
摘要:
The invention relates to a security system, based on the optical identification of highly specific, spatially appearing microstructures in a substrate using a micro-optical magnification system that is integrated in the substrate. Known systems disclose a microlens array having a plurality of optical axes, which is disposed over a micro-image array and generates only a virtual spatial overall image. For a highly complex spatial image, which cannot be imitated or only with extreme effort, the invention is characterized in that the micro-optical magnification system (05) has a single optical axis (15) and the micro-structure is formed directly by the spatially configured surface of at least one individual micro-particle or nano-particle (02), which is embedded in a transparent embedding medium (03) on the optical axis (15) of the micro-optical magnification system (05). With the invention, thus the real three-dimensional nature of special micro-particles or nano-particles (02) having highly specific micro-structure patterns on the surfaces thereof, which cannot be imitated, are used and provided as a public security feature due to the microlens magnification.
摘要:
Disclosed is a bioremediation method for accelerated biological decomposition of petroleum hydrocarbons in sea ice-covered polar regions as well as bacteria and enzyme mixtures as agents for carrying out said method. Suitable bacterial strains and enzymes obtained therefrom can be produced by concentrating and isolating bacteria in a laboratory in real ice conditions at -3°C and with oil contamination. Eleven preferred bacterial strains have been filed with the German Collection of Microorganisms and Cell Cultures Ltd. (DSMZ).
摘要:
Known is a reflector lamp with a combined reflector of a revolution-ellipsoid section and a further concave mirror with aperture. Its centre coincides with the first focal point and the aperture's centre coincides with the second focal point of the ellipsoid of revolution; the light source is arranged in the first focal point. This design type with a singular light source requires a high-power lamp. In the new reflector emitter, for a strong light beam using a plurality of lower-power lamps, revolution-ellipsoid sections RE are formed from revolution ellipsoids which are additionally cut in the focal-point plane. The sectional planes of all the mirrors are arranged in one common base plane and the mirror surface of the further concave mirror WH is directed in the direction opposite the others. The light sources LQ are arranged in the first focal points of the revolution-ellipsoid sections RE and their second focal points and the focal point of the further concave mirror WH coincide. All the light beams which are incident on the surface of the revolution-ellipsoid sections RE are reflected onto the further concave mirror WH. Here, the light beams form a shaped bundle which leaves the reflector emitter at right angles to the base plane through the aperture RA.
摘要:
Bei bekannten Rohrofen für die Pyrolyse, beispielsweise zur thermischen Spaltung von Methan für eine Untersuchung der Wasserstoff-isotopischen Signatur, mit einer konzentrischen Anordnung aus einem Rohrgehäuse, einer thermischen Isolierung, einem Sinter-Heizrohr, einem Zweiloch-Keramikrohr und einer Pyrolysekapillare berühren sich thermische Isolierung, Sinter-Heizrohr und Zweiloch-Keramikrohr. Dadurch kommt es zu Hot-Spots, die einen häufigen Austausch des Sinter-Heizrohrs erfordern. Da die Sinter-Heizrohre aber produktionsbedingt schwankende Außendurchmesser haben, müssen bei jedem Austausch auch die Heizrohrhalterungen ersetzt werden. Bei dem erfindungsgemäßen Rohrofen (01) bestehen die Heizrohrhalterungen (08) jeweils aus zumindest drei radial angeordneten Keramikstiften (09), zwischen deren Spitzen das Sinter-Heizrohr (06) gelagert ist, wobei jeder Keramikstift (09) in einer am Rohrgehäuse (02) festgelegten Klemmschelle (10) radial verschieblich fixiert ist. Dadurch sind eine Anpassung an unterschiedliche Durchmesser und ein einfacher Austausch möglich. Zur Vermeidung von Hot-Spots können weiterhin ein Isoliermantel (05) mit einem ersten konzentrischen Luftspalt (07) und Zentriersterne (18) zur zentrierten Lagerung des Zweiloch-Keramikrohrs (15) mit einem zweiten konzentrischen Luftspalt (16) zum Sinter-Heizrohr (06) sowie eine schonende Spannungsversorgung vorgesehen sein.
摘要:
lightweight rims for motor vehicles are increasingly replacing steel rims for motor vehicles. In order to achieve the required strength, the rim body is configured with a thick wall and is heavy. A weight reduction is desired, as rims in their capacity of unsuspended masses must be as light as possible, in order to maintain the contact with the ground. Light metal rims with varying constructions and designs are known in prior art. The inventive lightweight rim is characterised by a highly symmetrical and particularly delicate construction, which requires a small amount of material, but guarantees a high strength by the high degree of crosslinking. The spokes fall into two categories, radial spokes and ring spokes. The radial spokes have a high aspect ratio in terms of the width of the ribs to their depth with an intersecting overlay of the radial spokes with the ring spokes, so that all the spokes support one another reciprocally. Especially advantageous is a configuration of 16 radial spokes and 6 ring spokes. The form of the lightweight rim thus resembles that of the diatom Arachnoidiscus.
摘要:
The invention relates to sequence-specific capture probes for detecting toxic algae by means of selective hybridisation of a complementary nucleic acid sequence which unequivocally characterises the algae to be detected and is in the form of special base sequences which bind to complementary sequences of the rRNA of the small 18S sub-unit or the large 28S sub-unit of the algae-specific ribosome or the single-strand DNA. The invention also relates to an electrochemical detection method for rapidly detecting toxic algae in situ in a liquid sample using at least one immobilised, sequence-specific capture probe (7). According to the inventive method, an auxiliary probe (12) is used to enable or to improve a sandwich hybridisation of the nucleic acid sequence (10) which is characteristic of the algae, and a marked detector probe (11) is used to easily identify said sandwich hybridisation. Both additional probes (11, 12) are located close to the sequence-specific capture probe (7) with as small a distance as possible between sequences, with a maximum difference of between 150 and 200 bases. The invention further relates to an arrangement for carrying out the detection method said arrangement comprising a complete set of disposable biosensor chips (1) which have a three-electrode system (4, 5, 6) and are pre-coated by the corresponding capture probes, and a hand-held display appliance and to the use of said arrangement as an early warning system for toxic algae.
摘要:
Silicone oils, permanently cross-linked silicone resins or silicone particles in cross-linked resins, all of which being used for protecting against fouling (top curve), do not achieve any optimal results since no individual adaptation to the prevailing environmental conditions ensues. The inventive polymeric coating paste, on the contrary, has a defined rheological switching behavior (bottom curve) based on a flow point, which can be set to the hydrodynamic and biological environmental conditions for the part and which is between 5 Pa and 2000 Pa above the wall shear stress of the unfouled part to be protected. When the part is in a state in which it is not fouled, the nontoxic and hydrophobic coating paste forms a solid colonization substrate. In the minimally burdened state, the coating paste liquefies and acts as a loss layer thereby having a self-cleaning effect. The flow point can be set by selecting the composition base of the paste and by the homogeneous mixing thereof with fillers that increase or decrease shear. The rheological switching behavior makes it possible to efficiently prevent permanent fouling on sea structures.
摘要:
During an inventive laser ablation ICP-MS analysis method, solid matter samples (39) are examined in a frozen initial state. To this end, the sample chamber (2) as well as the carrier gas stream (12), which transports the ablated sample particles into the plasma (ICP-MS), are cooled to low temperatures (TK). The physical conservation, especially of ice samples (3), results in obtaining a particularly high local resolution and thus a high time resolution since their annual layers often remain preserved. An advantageous device (1) is provided with an insulated chamber (2) that can be cooled and with a simple circulating cooling device (17). The laser ablation analysis method can be used for all freezable sample materials used in mass spectrometry.