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this approach was used to characterize the substrate specificity of a large number of protein kinases.
this approach was used to characterize the substrate specificity of a large number of protein kinases.

the principal stresses and principal directions characterize the stress at a point and are independent of the orientation.
the principal stresses and principal directions characterize the stress at a point and are independent of the orientation.

in later research, the oriented peptide library approach has also been used to characterize protease cleavage specificity.
in later research, the oriented peptide library approach has also been used to characterize protease cleavage specificity.

unlike urea and thiourea, which have both been researched extensively, relatively few studies quantitatively characterize selenourea.
unlike urea and thiourea, which have both been researched extensively, relatively few studies quantitatively characterize selenourea.

it also remains an unsolved problem to characterize graphs which have the same chromatic polynomial and to determine which polynomials are chromatic.
it also remains an unsolved problem to characterize graphs which have the same chromatic polynomial and to determine which polynomials are chromatic.

both en route and on the planet's surface, it will characterize the broad spectrum of radiation encountered in the martian environment.
both en route and on the planet's surface, it will characterize the broad spectrum of radiation encountered in the martian environment.

this approach was then extended to characterize the specificity of ser/thr kinases and phospho-ser/thr binding domains.
this approach was then extended to characterize the specificity of ser/thr kinases and phospho-ser/thr binding domains.

objectives. to characterize the effect of crevice corrosion on the strength of dental silver amalgam as determined by the hertzian ‘ball on disc’ method, with a view to providing a test method for use in standards compliance testing. materials & methods. sixteen dental silver amalgam products were tested using the ‘ball on disc’ protocol at 30 d after setting at 37 ◦c in air or immersed in artificial saliva at ph 6.2. the mixed materials were packed into a tapered steel disc mold (10 mm diameter, 3 mm thick) resting on a glass surface, slightly overfilled and carved level with a sharp edge, then ejected at ∼10 min and placed immediately into an incubator at 37 ◦c. for corrosion specimens, the disc was laid on a flat polystyrene surface, immersed in artificial saliva, to create a spontaneous crevice corrosion cell. testing was in hertzian mode, using a 20 mm steel ball, with the specimen resting on a disc of glass-filled polyamide (e = 10 gpa) at a cross-head speed of 0.2 mm/min on a universal testing machine (e3000, instron). the load at first crack was recorded, as was the number of radial cracks produced.
odontologicoobjectives. to characterize the effect of crevice corrosion on the strength of dental silver amalgam as determined by the hertzian ‘ball on disc’ method, with a view to providing a test method for use in standards compliance testing. materials & methods. sixteen dental silver amalgam products were tested using the ‘ball on disc’ protocol at 30 d after setting at 37 ◦c in air or immersed in artificial saliva at ph 6.2. the mixed materials were packed into a tapered steel disc mold (10 mm diameter, 3 mm thick) resting on a glass surface, slightly overfilled and carved level with a sharp edge, then ejected at ∼10 min and placed immediately into an incubator at 37 ◦c. for corrosion specimens, the disc was laid on a flat polystyrene surface, immersed in artificial saliva, to create a spontaneous crevice corrosion cell. testing was in hertzian mode, using a 20 mm steel ball, with the specimen resting on a disc of glass-filled polyamide (e = 10 gpa) at a cross-head speed of 0.2 mm/min on a universal testing machine (e3000, instron). the load at first crack was recorded, as was the number of radial cracks produced.