Patricia Ann Straat

59158247, Jun 29, 1999

Feb 28, 1997

8/808399

Patricia Ann Straat - Sykesville MD

F21V 3300

362133

The present invention relates to a quickly releasable removably engaged light source for use with a display shelf. A shortened display shelf having a top and bottom, a front and a back edge is mounted to a wall such as the back edge of the display shelf has an air-gap between it and the surface to which it is mounted. A removable light support member is releasably engaged with the back edge of the shelf. On the back of the light support member, there is a light attached thereon. The distance between the back of the removable light support and the surface to which the shelf is mounted is such that an air-gap is created between them so that the quickly releasable support member and attached light can be removed from the shelf without the light on the back of the removable light support member hitting the surface. The present invention can also be used in display units wherein a shortened shelf is held within the display unit and a air-gap is created between the back edge of the shortened shelf held within the display unit and the back wall of the display unit. The air-gap is sized such that when the quickly releasable light support member is engaged with the back edge of the shortened shelf, there is sufficient room between the back of the releasable light support member and the rear wall of the display unit so that the light attached to the back of the releasable light support member can be easily removed from the display unit without hitting the rear wall of the display unit.

42949319, Oct 13, 1981

Dec 26, 1979

6/107383

Gilbert V. Levin - Annapolis MD
Patricia A. Straat - Baltimore MD

Biospherics Incorporated - Rockville MD

C12M 120

435301

There is disclosed a device for conducting a microbiological radiorespirometric assay. The device comprises a support member which includes a plurality of pairs of chambers. One chamber in each pair contains a radioactive labeled substrate which is capable of being metabolized by at least some microorganisms to yield a radioactive gas. The other chamber in each pair contains a means for collecting radioactive gas. The two chambers in each pair are in communication with each other by means of a passageway, which opens into each of said chambers at the upper portion thereof. There is also disclosed a method for determining whether microorganisms contained in a sample material will metabolize a radioactive labeled substrate in the device. The method comprises placing said material in contact with a radioactive labeled substrate, collecting any gas which is evolved, exposing a photosensitive material to said collected gas and determining if a spot is produced on said photosensitive material. The production of a spot is indicative of the presence of radioactivity which indicates that the substrate has been metabolized by a microorganism.