Abstract: A multipurpose detergent composition comprising from about 5% to about 25% of a surfactant system comprising: from about 20% to about 100% of at least one anionic surfactant, wherein no more than about 12% by weight of the overall multipurpose detergent composition comprises anionic surfactants having more than 14 carbon atoms; from about 0.04% to about 40% of an ethoxylated nonionic surfactant; and from about 0.5% to about 5% of at least one organic acid, each organic acid in the multipurpose detergent composition having fewer than 9 carbon atoms, whereby the multipurpose detergent composition has a neat pH of from about 2 to about 7; the multipurpose detergent composition is substantially free of cationic surfactants, zwitterionic surfactants, and amphoteric surfactants, enzymes, soil suspension polymers and soil release polymers.

Abstract: Methods and materials for producing porphyrins are described. In particular, microorganisms that contain one or more exogenous nucleic acids are described that produce porphyrins in high yield.

Abstract: A disc recognizing method prevents a leaf spring of a pickup from being deformed in an optical disc playback apparatus including a pickup transfer for moving a pickup and a plurality of starting point detecting switches for recognizing a type of a seated disc. The method includes a disc recognizing step of recognizing the seated disc by virtue of an on state of a first starting point detecting switch which corresponds to the starting point of a laser disc when a playback mode is selected, a disc recognizing step of recognizing the seated disc by virtue of an on state of a second starting point detecting switch which corresponds to a compact disc, and a disc recognizing step of recognizing the seated disc by inwardly transferring the pickup for a predetermined period of time when a focusing operation fails after the first starting point detecting switch has been turned on.