Lymnea columella snails were exposed to 3-5 newly emerged
Fasciola hepatica miracidia. The procedure insured 75-100 percent
infection of the host. Groups of 40 each exposed snails were placed
in controlled temperature containers and maintained at the following
series of temperatures: 8°, 15°, 20°, 25°, 30°, and 35° C. Two...
We undertook an interlaboratory comparison of techniques used to extract and analyze trapped gases in ice cores. The intercomparison included analyses of standard reference gases and samples of ice from the Greenland Ice Sheet Project 2 (GISP2) site. Concentrations of CO₂, CH₄, the δ¹⁸O of O₂, the δ¹⁵N of N₂,...
Background: DNA barcoding of rain forest trees could potentially help biologists identify species and discover new ones. However, DNA barcodes cannot always distinguish between closely related species, and the size and completeness of barcode databases are key parameters for their successful application. We test the ability of rbcL, matK and...
