摘要:
Methods, systems, apparatus and machine readable media are disclosed to reduce biological carryover. An example method includes generating an alternating electromagnetic field and introducing an aspiration and dispense device into the electromagnetic field. The example method also includes inductively heating the aspiration and dispense device with the electromagnetic field to at least one of denature or deactivate at least one of a protein or a biological entity on a surface of the aspiration and dispense device.
摘要:
Methods, systems, apparatus and machine readable media are disclosed to reduce biological carryover. An example method includes generating an alternating electromagnetic field and introducing an aspiration and dispense device into the electromagnetic field. The example method also includes inductively heating the aspiration and dispense device with the electromagnetic field to at least one of denature or deactivate at least one of a protein or a biological entity on a surface of the aspiration and dispense device.
摘要:
Subterranean drill bits and particularly to nozzle features to be incorporated in subterranean bits. In one embodiment, the nozzle assembly of the invention defines a wear resistant structure which extends upstream from the terminus of the transition area. In another embodiment, nozzle assemblies are arranged about the transition area at low angles so as to minimize flow turbulence.
摘要:
An improved bi-center bit with improved directional stability and wear resistance is disclosed, which bit optimally utilizing a plurality of shaped PDC cutting elements selectively situated about the cutting surfaces of the pilot and the reamer to produce a minimal force imbalance, where further the pilot bit and the reamer are force balanced to further reduce imbalance in the operation of the tool.
摘要:
An improved disc-shaped cutting element including first and second major flat surfaces and a cutting edge, said element comprised of a hard metal substrate defining an irregular interface bonded to a polycrystalline diamond, where said interface includes a plurality of concentric and redial grooves adapted to receive corresponding protrusions formed on the diamond layer so as to enhance wear like and impact resistance.