Two simple media for the enhancement of pigment production by certain organisms of the Pseudomonas genus are described. The results of comparative studies employing these media, certain synthetic broths, and some commonly used dehydrated preparations are reported. One hundred (93 per cent) of the 107 strains of Pseudomonas studied were detected by pigment production on medium B; all 107 strains could be detected by the combined use of Heart Infusion agar and 27 per cent on Tryptose agar. The reactions produced strains elaborated a water-soluble pigment; 40 per cent were positive on Difco media A and B. On Difco Proteose peptone No. 3 agar, 77 per cent of the same on the two media by organisms belonging to certain other genera are described.

ABSTRACTA description of the clays and methods employed by an American mining and smelting company in the Andes Mountains for the manufacture of common and refractory brick.

Arcing in a high power energy system has a detrimental effect on the operational performance, energy efficiency, life cycle and operating and support costs of the facility. Under heavy arcing conditions, these systems pose a threat to the humans that operate the equipment as well as the plant infrastructure. Arcing can occur in motors, switching- networks, transformers, etc. and have an additional negative effect due to the electromagnetic pulse or interference that radiates from the event. A capability is needed to identify single events and/or entrained events in such a manner as to provide an effective measure (or grading) of arcing occurrence. This measure could then be normalized to a process operation to provide a performance index of system health. This paper details the development of a model-based matched filter approach that identifies single and/or multiple arcing events independent of source, calculates an energy estimate, and then a measure (or grading) as a function of process along with a confidence estimate.