Mass Spectroscopy (Other Keyword)
1-2 (2 Records)
While tobacco use was a widespread and important social practice among Native Americans during the Historic Period, the prehistoric origins of the practice are poorly understood. Smoking pipes significantly predate botanical evidence of tobacco in Eastern North America. A promising technique for addressing this problem is gas chromatography/mass spectroscopy (GC/MS) analysis to identify nicotine or related compounds in smoking pipe residues. GC/MS analysis of a smoking pipe dating to...
An Experiment in Removing Spray Paint Graffiti from Hohokam Rock Art with Graffiti-B-Gone (1997)
In December 1994, an Arizona Site Steward notified the Phoenix City Archaeologist that a major rock art panel in South Mountain Park had been spray painted with graffiti. At least 700 years old, this Hohokam petroglyph panel is located on a dense, patinated, granodiorite boulder near a city street at the northern edge of the park's boundary. Spray paint graffiti had previously been placed on city structures along the street, as well as on several petroglyph boulders within the park, but this act...