Multiple probe contacts

Volumetric Metering. This unit is employed where volumes exceeding the capacity of the automatic pipets are desired. Liquid flowing into the unit rises until it contacts a prepositioned probe. The contact probes are for electrically conducting liquids. Capacitance-sensitive probes are available for nonconducting or inflammable liquids. A number of liquids may be admitted in sequence by employing multiple probes and valves. 

ISO 10360-5 (2010) Geometrical Product Specifications (GPS) - Acceptance and reverification tests for Coordinate Measuring Machines (CMM) — Part 5 CMMs using single and multiple stylus contacting probing systems... 

Since the process temperature for most lead-frees are higher than for eutectic- or near-eutectic Sn-Pb solder, any flux residues associated with No-Clean soldering are more thoroughly baked onto PWB snrface metals. This inhibits electrical test probe contact. Even with today s No-Clean solder pastes and with Sn-Pb solders, electrical probing can be a challenge. Often the residues that cover test points necessitate multiple seating cycles of the test probes to penetrate the flux residue. 

In an extensive investigation of the stereochemical memory effect, a series of six diastereomeric pairs of substrates was prepared to probe the effect of single, then multiple substituents on the 5-exo cyclization of amines onto alkene radical cations [144,145]. Overall, these cyclizations were highly dia-stereoselective and were accounted for by a transition-state model employing a chairlike transition state with attack of the nucleophilic amine on the opposite face of the alkene radical to the one shielded by the phosphate anion in the initial contact ion pair (Scheme 34), as exemplified in Schemes 35 and 36. 

Thermometers. The sensor probe should be placed in the bath in a central location removed from the heater and stirrer units. If a single cell or sample holder immersed in the bath is the only object of interest, the probe should be placed near this cell but not touching it. The measuring thermometer should be placed in good thermal contact with the cell or sample holder if there is only one or positioned close to the location of multiple cells. 

Petkova and Tycko have described investigations of the effects of rotational resonance (R ) on solid state C NMR spectra of uniformly C-labelled samples obtained under MAS." The utility of R measurements as structural probes of peptides and proteins with multiple uniformly labelled residues has been demonstrated. Results for uniformly C-labelled L-alanine and L-valine in polycrystalline form and for amyloid fibrils formed by the 15-residue peptide with uniform labeling of a four-residue segment have been reported. The MAS NMR spectra revealed a novel J-decoupling effect at R conditions that may be useful in spectral assignments for systems with sharp C MAS NMR lines. Pronounced dependences of the apparent isotropic NMR chemical shifts on MAS frequency near R conditions were also observed. The feasibility of quantitative distance determinations in L-valine, and qualitative determinations of inter-residue contacts in fibrils has been demonstrated. In addition, it has... 

A catheter tip or probe electrode is placed in a naturally occurring cavity in the body, such as in the gastrointestinal system. A metal tip or segment on a catheter makes up the electrode. In the case where there is no hollow lumen, the catheter or probe is inserted into the cavity so that the metal electrode makes contact with the tissue. A lead wire down the lumen of the catheter or down the center of the probe connects the electrode to the external circuitry. Multiple electrodes can be placed along the probe as illustrated in Figure 4.5a. 

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