Diffraction images of truncated sine and square wave periodic objects in the presence of linear image motion

Intensity distribution in the diffraction images of truncated one-dimensional periodic objects formed in the presence of linear image motion by a diffraction-limited optical system has been studied. Incoherent sine and square wave objects have been considered with a various number of cycles and for various degrees of image motion. The graphical presentation of results clearly shows the degradation in the image due to linear motion blur. Image contrast and average irradiance have been tabulated for a number of cases. For certain values of the motion parameter spurious resolution results. It has been found that the number of periods in the target required to approximate a target with infinite number of periods in the presence of linear motion is more than that in the absence of motion. For certain values of linear motion blur, the contrast remains zero irrespective of the number of periods considered.

An extracellular proteolytic enzyme from Scopulariopsis brevicaulis. II. Hydrolysis of polyamino acids

Scopulariopsis brevicaulis protease hydrolyzed poly-L-lysine and poly-L-glutamic acid; optimum pH values for hydrolysis were 10.6 and 4.7 respectively. Final products of poly-L-lysine digestion by the protease were intermediate peptides from tetramer upwards. Pentalysine was not hydrolyzed by the enzyme. The protease had no action on poly-L-aspartic acid, poly-L-alanine, poly-L-glycine, poly-L-valine, or poly-L-leucine.