No abstract

1,2-Indandione has been used to develop fluorescent fingerprints on porous materials such as paper. The compound reacts with amino acid residues to produce highly fluorescent fingerprint ridges. An optimized formulation and treatment protocol for using the reagent is presented here. The reagent is applied as a solution in HFE7100 containing acetic acid and ethyl acetate. Treated articles are heated at 100°C for 10 min at ambient humidity and stored in the dark before recording the fingerprints using fluorescence photography or digital imaging. Photodecomposition of the fluorescent fingerprints has been observed. Storage in the dark reduces degradation, extending the lifetime of the fingerprints. Other chemical methods to stabilize the fingerprints proved unsuccessful. Comparisons of the performance of 1,2-indandione with DFO in CFC113 performed on a limited range of substrates indicated that the reagent might be an effective method for the development of latent fingerprints despite the new reagent producing less intense fluorescence.

No abstract

No abstract

CHAPTER 1. GENERAL INTRODUCTION The cause of population isolation in A. maritima is controversial. Some theorize that indigenous people carried seeds from the Delmarva population to Oklahoma due to the use of Alnus in various medicinal remedies (Stibolt, 1981). However, the more recently discovered population in Georgia, and fossil evidence of other Clethropsis subgenera in the northwestern United States, tend to discount this theory (Furlow, 1979; Schrader, 1999; Schrader and Graves, 2000a; 2000b; Stibolt, 1981). The populations in Georgia and on the Delmarva Peninsula more closely resemble each other than the population in Oklahoma, both morphologically and developmentally (Schrader and Graves, 2000a). These findings, along with the fossil evidence, indicate the three populations are vestiges of a larger population, with the population in Oklahoma becoming isolated and diverging before the populations in Delmarva and Georgia (Furlow, 1979; Schrader and Graves, 2000a; Stibolt, 1981). Urban landscapes Plants are an integral part of our managed landscapes (Grey and Deneke, 1986). Trees in urban environments often suffer greater stress than trees in more natural settings. Urban trees are planted because of their aesthetic and physical benefits, while trees found in nature are adapted to their habitats (Kramer, 1987). In general, urban landscape plantings use only a few species known to tolerate the environmental stresses unique to urban areas (Hunt, • 1989). In New York City, four species constituted 82% of 375 trees planted on land of the Consolidated Edison Company (Berrang et al., 1985). Two of the predominant abiotic stresses plants in managed landscapes must tolerate or avoid are extreme and varied soil