Fluorescamine is a new reagent for the detection of primary amines in the picomole range. Its reaction with amines is almost instantaneous at room temperature in aqueous media. The products are highly fluorescent, whereas the reagent and its degradation products are nonfluorescent. Applications are discussed.

No abstract

No abstract

have been discussed by Cameron (32), Johnson (33), Manley (34), and Matsuoka et al. (35).On the basis of the rather crude x-ray positional data that were available in the fall of 1966, Sandage made a photographic survey of a 4by 4-degree region surrounding Cyg XR-2. Subsequently, more accurate information was provided by the ASE-MIT group, which led to an identification of Cyg XR-2 with a 16th-magnitude blue star noted on the Palomar plates. If the identification is confirmed, Cyg XR-2 and Sco XR-1 will be "charter members" of a newly recognized class of stars, located in our own galaxy, whose x-ray luminosities considerably exceed their optical outputs. References and Notes 1. The 1967 Texas Symposium had a registration of approximately 650 persons. The organizing committee and sponsoring organizations consisted of A. have been discussed by Cameron (32), Johnson (33), Manley (34), and Matsuoka et al. (35).On the basis of the rather crude x-ray positional data that were available in the fall of 1966, Sandage made a photographic survey of a 4by 4-degree region surrounding Cyg XR-2. Subsequently, more accurate information was provided by the ASE-MIT group, which led to an identification of Cyg XR-2 with a 16th-magnitude blue star noted on the Palomar plates. If the identification is confirmed, Cyg XR-2 and Sco XR-1 will be "charter members" of a newly recognized class of stars, located in our own galaxy, whose x-ray luminosities considerably exceed their optical outputs.References and Notes 1. The 1967 Texas Symposium had a registration of approximately 650 persons. The organizing committee and sponsoring organizations consisted of A.