Hamilton Bonaduz Ag

Ems-Chemie Ag

Renato Nay

Vinzenz Kirste

Rainer Beckbissinger

Manfred Hewel

Markus Bentz

Rene Ackermann

A process for hydrophobically coating a pipette tip by wetting at least regions of the inside of the pipette tip with a wetting solution, the process including: providing a holding cavity other than the pipette tip on a pipette device, immersing the holding cavity in the wetting solution, aspirating wetting solution into the holding cavity, connecting the pipette tip to the holding cavity, dispensing the aspirated wetting solution from the holding cavity through the pipette tip so as to rinse a pipetting fluid holding chamber portion inside the pipette tip, and evaporating solvent contained in the wetting solution.

Process for hydrophobically coating a pipette tip

Processes for hydrophobically coating a pipette tip by wetting at least regions of the outside and inside of the pipette by with a wetting solution are disclosed. Such a process may include coupling the pipette tip to a fluid pressure source having variable fluid pressure, immersing the coupled pipette tip in the wetting solution, aspirating wetting solution into the pipette tip, dispensing the aspirated wetting solution, and evaporating solvent contained in the wetting solution.

A liquid-metering device is disclosed, in particular, a pipetting device for aspirating and dispensing liquids. The device comprises a vessel which is at least partially filled with gas and has an opening through which liquid is received or discharged, a gas-pressure-changing device for changing the gas pressure in the vessel, a state-variable-detecting device for detecting at least one state variable of the gas in the vessel, and a control device which activates the gas-pressure-changing device as a function of the state variable detected by the state-variable-detecting device. The control device is a regulating device which, during a regulating time segment between liquid reception and liquid discharge, activates the gas-pressure-changing device as a function of the detected state variable such that the actual gas pressure in the vessel is kept essentially at a predetermined gas pressure.

Drip-resistant pipetting device and drip-resistant pipetting method

The invention concerns polyamide molding compositions with good surface quality and good flow behavior containing prepolymeric polyamides with a solution viscosity of &#x3bc;rel 1.01&#x2013;1.30 in quantities from 0.1 to 20 wt. %.

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Masein, Switzerland

Renato Nay