The present invention relates to the use of the compound A) 4-pyrrole-3-carbonitrile as a microbicide for the protection of engineering or industrial materials, to mixtures containing such compound, and to the use of such mixtures for the protection of engineering or industrial materials. The method further includes supplying a solution for forming a thin film onto the organic molecule film pattern, and selectively forming the thin film on the organic molecule film pattern. An ion source ionizes the sample. A quote is extracted from the identified sentences and displayed to a customer in conjunction with information regarding the individual item. ABS and ABS satisfy a relation, ABSABS<0.