Abstract: A method of examining an object containing a polycrystalline material, in which at least one part of the surface of the object is illuminated with substantially isotropic light, as well as a illumination device for carrying out the method. In this manner, the polycrystalline material is less influenced by the different reflection characteristics of individual particles of the polycrystalline material.

Abstract: A method for inspecting surfaces 12 with n+1 repeating patterns 16, with a camera 18 producing an image 12? with a plurality of pixels forming a matrix of pixels, said pixels generating a technical value such as the gray value or the like, and with a computer unit 26 processing data of said pixels for the detection of the condition of said surface 12, which method comprises the following comparison steps: each value of a pixel to be inspected—inspection pixel—is compared with a value of a reference pixel, the difference of the comparison of said pixels will determined the result of the inspection. The invention is characterized in that only the values of the pixels of the matrix referring to said image 12? are the basis for said values of said reference pixels to detect the condition of said surface 12.

Abstract: The invention relates to a process for recombinantly preparing picornavirus particles, in particular hepatitis A virus particles, their precursors and particles which are derived therefrom, with a structural protein precursor molecule (P1-2A or P1) and the corresponding P3 region (3ABCD) being coexpressed in cis or in trans.