In one aspect of the invention, a method recovers oil from a concentrated byproduct, such as evaporated thin stillage formed during a dry milling process used for producing ethanol. Also invented is a method of treating thrombocytopenia, in a mammal, including a human, in need thereof which comprises administering to such mammal an effective amount of a selected hydroxy-1-azobenzene derivative. One guide element is provided in an area where a non-drive element is provided. 01-50 g10 min, a molecular weight distribution in the range 3. Cylindrically precision centering means are provided at the connectors, which fit into each other and precisely align the center axis of the connectors resulting in reduced passive intermodulation.