The present invention is to present a particle analyzer that is capable of classifying and counting particles contained in a sample more accurately. The inorganic oxide particles obtained by the method of the present invention have high purity and are excellent in flowability. Each shackle can be configured to hold a poultry member in a processing position as the shackles are moved along the processing line. The predetermined force and the area of a contact region between the closing member and the valve seat determine how much pressure difference is needed to open the aperture. Also provided are high throughput methods for identifying substances that promote or inhibit the generation and function of IL-10 producing T cells. The system includes a first mirror, a second mirror, a third mirror, a fourth mirror, a fifth mirror, and a sixth mirror situated in an optical path from an object plane to an image plane, for imaging an object in said object plane into an image in said image plane.