Contrast control

The characteristics of a support material are of great importance to the measured enzyme activity [79, 101]. Hydrophobic carriers have a low ability to attract water, thus leaving more available for the enzyme, hence Wehtje et al. [102, 103] have shown that celite is a suitable carrier for the PaHnl to yield an immobilized form of the enzyme. In contrast, controlled pore glass (CPG) and Sephadex G25 were found to be less well suited to enzyme support as, using these systems, cyanohydrin synthesis was significantly reduced (over 30%). Sephadex also promoted the spontaneous addition of HCN to benzaldehyde [102]. A series of batch experiments showed that if the solvent (diisopropyl ether) surrounding the immobilised PaHnl contained insufficient water (i. e. less than 2 %), it would be extracted from the enzyme preparation and consequently enzyme activity was lost [102]. These results were the basis for the production... 

Variable contrast control produces higher signal/noise ratio... 

Note that there are two distinct steps in negative creation—expose and develop. The same distinction applies to printmaking—exposure and contrast control. Thus, our axiom for printmaking is expose (exposure time) for the highlights and contrast control (VC filters or paper grade selection) for the shadow areas. 

As shown by measurement of root and hypocotyl elongation, the treatment with the RO fraction did not prevent the initial absorption of water by the seed, which is essentially a passive process. However, it effectively inhibited the ensuing expansion of these organs, which results from a combination of cell expansion and cell division. As late as 46 h after seed imbibition, no sign of cell division was visible in roots from seeds treated with 1 8- and 1 10-diluted RO fraction, and only occasional divisions, mainly in the procambial area, were observed after treatment at 1 14 dilution. By contrast, control roots resumed active cell division within 16 h after imbibition. As a conspicuous consequence of the inhibition of cell expansion/division activity, the apex of roots from treated seeds appeared distinctly... 

A novel method developed by Bringmann and coworkers, by contrast, controls the formation of the biaryl juncture and atropisomerism separately. We chose to apply this latter strategy to our system to provide diol (+)-18 as a single atropisomer from benzocoumarin lactone ( )-19... 

Contrast control in printing motion-picture duplicates (glass) AAA. 

Local contrast control involves a combination of logarithmic compression and lateral inhibition, the latter provided by a horizontal resistive network (a neural network ) (7). After logarithmic compression, the output from a given pixel (Vi) is... 

A primary task in high-level architecture synthesis is the extraction of the data flow from a given algorithm description. The term data flow is defined here as the combination of operations and dependencies between them that define the algorithm. In contrast, control flow is then defined as a (partial) ordering of computations meeting the restrictions of their dependencies. The control flow is usually specified by introducing loops and function hierarchy. 

These scaffolds are bioresorbable, biocompatible and osteoconductive and can be easily molded to fit the individual defect. These properties were demonstrated by implantation of PLLA membranes into New Zealand White rabbits to cover 1 cm mid-diaphyseal defects of the radii. LIntreated defects of a similar size on the contralateral limb served as controls. Results showed that within the experimental animals, cortical bone was seen spanning the defects with no adverse effects. In contrast, controls developed radial-ulnar synostosis without bone formation. 

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