Sliding partners

An additional phenomenon can occur at the sliding interface of two materials of different hardness. In this case, the chemical bonds that are continuously formed and broken at the interface compete with chemical bonds within the softer material. As a result, parts of the softer of the two sliding partners are transferred to the harder-... 

Sliding partner gray iron 30 steel X20Cdl3... 

In particular, the low tendency to adhesion gives polymers their good slip characteristics with steels as the sliding partners in the absence of additional abrasive particles because of the low... 

Our primary interest in employing an elastomeric (PDMS) pin as the sliding partner for these three SAM films is to test if the alkyl-chain-dependent (C5CH3 versus C11CH3... 

Disc An example of the images collected on a tribotrack produced with 10 N at 80 °C and on the ball is shown in Fig. 8 to compare the films formed on both sliding partners. The tribotrack on the disc was clearly visible in the phosphorus 2p image, where the tribotrack showed higher... 

According to this concept, the wear process starts with the detachment of particles from the sliding partners. The detached particles remain for a certain time trapped between the two contacting bodies where they form a separating third body that influences contact stress distribution and thus the overall tribological behaviour. The effective material loss associated with wear is given by the definitive ejection of third body particles from the contact. In case of tribocorrosion, the third body approach should be adapted to include the mass flow associated with corrosion processes. 

The toroidal structure of PCNA has distinct front and back faces that might provide a variety of sites for interaction with other proteins. The loop region between the twin domains of each monomer is a highly immunogenic exposed site that is important for interaction with other proteins. Such functional protein partners are thought to be crucial in regulating the role of PCNA in replication and repair. The aforementioned symmetry could define the directionality of PCNA movement as it slides along DNA. 

The stabilization of dioxygenated Co(il)- and Fe(n)-Blm on DNA suggests that the complex is not able to undergo the rapid cycles of dissociation and rebinding necessary to find a partner to carry out Reactions 4 or 14. Nor is a rapid sliding process available to facilitate these reactions. 

With some detection technologies compounds can be screened in microarrays instead of plate wells. This requires that either the small molecule or the target be attached to a solid support, usually a glass slide, as shown in Figure 6.9. The other potential binding partner, which can be labeled (say with a fluorescent dye if fluorescence microscopy is used) or unlabeled (if surface plasmon resonance detection, discussed later, is to be used), is then exposed to the shde and interactions are detected. 

Figure 6.9 Small-molecule and protein microarrays different small molecules or proteins are attached to a glass slide (usually 25 x 75 mm) and probed with a fluorescently labeled binding partner. Fluorescence microscopy is used to detect small-molecule-protein interactions. (Reprinted with permission from ACS Chem. Biol. 2007, 2, 24-30, copyright 2007, American Chemical Society.)...

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