29 with Helen Swift, Japan Foundation Assistant Curator of Asian Art. Tickets are $50, available at /11099a/Portland-Fine-Print-Fair-Benefit-Preview.Įnjoy guided tours with Mary Weaver Chapin, Ph.D., Curator of Prints and Drawings, at 10:30 a.m. The preview is a benefit for the Print Department of the Portland Art Museum. 27, an opportunity to view the fair before it opens to the public. Prints from the Old Masters to contemporary emerging artists will be on sale and excellent works can be found in all price ranges.Īdmission is free on Saturday and Sunday, Jan. Patrons can peruse and purchase prints from 16 top dealers from across North America and Europe. Now in its 10th year, this is the largest and most comprehensive print fair on the West Coast. 27-29 in the Fields Ballroom of the Portland Art Museum, 1219 S.W. These chemical fingerprints, the researchers say, could be used in future research to clarify inputs and removals of methyl chloride in the atmosphere.The Portland Fine Print Fair returns as an in-person event from Jan.

They discovered a unique isotopic pattern that differs from those produced by other methyl chloride–degrading plants, suggesting that club moss uses an unknown mechanism to process the gas. Next, the researchers analyzed the isotopic composition of methyl chloride when it is broken down by club moss (Selaginella kraussiana). They found that the proportions of carbon, hydrogen, and chlorine isotopes in methyl chloride produced by the royal ferns differed significantly from those produced by industrially manufactured methyl chloride. They collected and analyzed samples of royal ferns in a botanical garden in Germany. The researchers first investigated methyl chloride production by the royal fern, which is common in temperate and subtropical regions and emits large amounts of methyl chloride. Isotope analysis, they say, could help elucidate the distribution of the gas's origins and removal.

Their analysis also revealed that another plant, called club moss, breaks down methyl chloride using an as yet undiscovered mechanism. Isotopes are different forms of the same chemical element with varying numbers of neutrons. In a new study published in the Journal of Geophysical Research: Biogeosciences, Hartmann and colleagues discovered that plants called royal ferns (Osmunda regalis) emit methyl chloride with an isotopic composition different from that emitted by industrial sources.

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