This invention relates to articles of manufacture containing liquid compositions of hypohalous acid or hypohalous acid salt for deactivating allergens and preventing diseases on hard surfaces, soft surfaces and in the air. Such suspensions are dried or otherwise caused to precipitate out the particles in ordered arrays. The PAA system is further configured to start or stop with minimal impact on the portal application, wherein the PAA system is coded using Aspect Oriented Programming and able to collect information from multiple threads. The emission beams are guided through an optical system to two detectors. The step member is provided with a protrusion protruding downstream in the conveying direction of the document to form space between the transmitting glass and a downstream part of the step member in the conveying direction of the document.