An apparatus for determining a bidirectional reflectance distribution function of a subject. The present invention also provides a process for producing eukaryotic microbial lipids. The usage information is provided to an administrator or other authorized user in a format that is easily readable and usable. In the apparatus a detecting device detects the audio information and the reproducing control information from the medium. As a result, there is no need to wait with the local etching work until the alumina discharge tube 2 rises in temperature to the desired temperature due to the heat by the plasma discharge, that is, it is possible to perform the local etching work immediately after the plasma discharge. In particular, the present invention relates to two-part room temperature vulcanizing compositions which include in one of the parts a moisture curing organic polymer which is substantially free or does not contain siloxane bonds in its backbone.