摘要:
Suction device to draw off sample liquids from filtration vessels to recipient vessels including an evacuable chamber, which has an upper opening with a continues circular sealing surface for marginally supporting at least one filtration vessel mountable in place from top and may be opened for the insertion and removal of at least one recipient vessel, and including a support parallel to the sealing surface to enable the recipient vessel to be positioned in the chamber below the filtration vessel wherein the upper opening including the circular sealing surface is disposed on a first chamber portion adapted to be displaced with regard to a stationarily disposed, second chamber portion including the support where the first and second chamber portions complement each other in a charging position to form a sealed chamber and the first chamber portion releases the support, in an access position displaced away from the second chamber portion, for the insertion and removal of the recipient vessel.
摘要:
The invention concerns a thermostated block for laboratory thermostats and comprising wells at a wells side to receive and make large-area contact with the parts of vials filled with sample liquids and comprising at least two heat regulating devices contact the thermostated block in thermally conducting manner to generate different temperatures at different sites of the thermostated block, said block being characterized in that the heat regulating devices are in large-area contact with adjoining zones of the contact side opposite the wells side of the thermostated block.
摘要:
The invention relates to an electronic pipette comprising an electrically driven unit for pipetting and an operating and/or display unit, wherein a device module comprises a unit for pipetting, an operating and/or display module physically separate from the device module completely or partially comprises the operating and/or display unit, and means are provided for wirelessly communicating between the device module and the operating and/or display module.
摘要:
The invention relates to a laboratory centrifuge rotor (1) running in air and devoid of an air chamber, comprising rotor arms (2) ending in fork arms (4), containers (6) swinging out on pivot pins (5) being suspended between said arms (2), said rotor being characterized in that an aerodynamic cladding component (12, 16, 20, 25) is mounted ahead as seen in the direction of motion on each rotor arm (2, 4) and/or ahead of each container (6) in at least the radially outermost regions of the zones (7) facing the incident airflow of the swung-out containers (6).
摘要:
An evacuating apparatus for applying suction to the underside of a microtitration diaphragm plate including a plurality of diaphragm receptacles each having an open top and a diaphragm bottom, the evacuating apparatus including a housing defining an evacuation chamber having an aperture provided in a top wall of said chamber and having associated therewith peripheral gasket means for supporting a rim of said microtitration diaphragm plate, and further comprising a carrier including support means for supporting a microtitration recipient plate including a plurality of closed bottom receptacles each having an open top and a closed bottom, said carrier being adapted to be displaced between an access position wherein said recipient plate may be positioned onto or removed from said support means, and a loading position wherein said recipient plate is disposed within said chamber below said diaphragm plate so that said diaphragm receptacles of said diaphragm plate vertically register with said closed bottom receptacles of said recipient plate, said carrier having a face plate which sealingly engages a peripheral edge of an access opening of said chamber when said carrier is in its loading position.
摘要:
In controlling the boundary layer of flow over the surface of a body, for reducing resistance and impeding flow separation, a sensor element in the surface measures certain flow values in the boundary layer. The measured values are conveyed to an analyzer control circuit which, in turn, conveys a signal to an active vibration transmitter in the surface of the body for providing the required control.
摘要:
The present invention relates to a pipette having: a rod-shaped handle body in which a drive unit is arranged for a displacement unit having an operating element in the top end, and having a seat for a pipette tip or syringe in the bottom end, wherein the handle body has a front grip surface that is approximately straight in the bottom part of the handle body in a vertical sectional plane through the handle body, and curves across the handle body toward a thumb rest in the top part of the handle body above the area that comes into contact with the surface of the hand, and the operating element actuatable with the thumb is arranged in the thumb rest.
摘要:
A laboratory apparatus having at least one control device (4) comprising an electric printed-circuit board (15) of the control device (4) that is disposed on an instrument body (2) of the laboratory apparatus (1) and has at least one electric control element (16, 18), at least one operator interface (6) of the control device (4) including at least one operator control (11, 33); a retaining device (29, 30) for detachably holding the operator interface (6) on the instrument body (2) with the operator control (11, 33) oriented to the control element (16, 18), and a mechanical and/or magnetic connection for detachably joining the control element (16, 18) mechanically and/or magnetically to the operator control (11, 33).
摘要:
The invention relates to an apparatus, in particular for moving particles in a fluid at Reynolds numbers larger than 0.5, which comprises a container section adapted to hold said fluid, and which is adapted to perform a displacement process, which includes a number of repeated displacements of said container section, comprises at least one actuating device, which is adapted to perform said displacements, at least one connecting means, which connects said container section to said actuating device, said displacement comprising a first motion of said container section from a first position to a second position and a second motion of said container section from said second position back to said first position, wherein during said first motion said container section is at least temporarily moved with a first velocity, and wherein during said second motion said container section is at least temporarily moved with a second velocity, which is different from said first velocity, and wherein by means of said displacement process, a force is acting upon said particles in the fluid, which is capable of inducing a directed motion of said particles in relation to said container section, wherein said first and second velocity of said container section control, i.e. influence or determine, said motion of the particles. The invention further relates to a method for in particular moving particles in a fluid at Reynolds numbers larger than 0.5.
摘要:
The invention relates to a laboratory centrifuge rotor (1) running in air and devoid of an air chamber, comprising rotor arms (2) ending in fork arms (4), containers (6) swinging out on pivot pins (5) being suspended between said arms (2), said rotor being characterized in that an aerodynamic cladding component (12, 16, 20, 25) is mounted ahead as seen in the direction of motion on each rotor arm (2, 4) and/or ahead of each container (6) in at least the radially outermost regions of the zones (7) facing the incident airflow of the swung-out containers (6).