Arthur C. Medeiros

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GMP-PNP, a non-hydrolyzable analog of GTP binds tightly to G-protein in the presence of Mg2+, so that the binding is stable even after exhaustive washings. This property was exploited to prepare membrane samples of rat brain where G-protein GTP-binding sites were saturated with GMP-PNP. Experiments carried out with these membranes showed that GTP, GMP-PNP,(More)
We summarize information on current distribution of the invasive lizard Chamaeleo jacksonii and predict its potential distribution in the Hawaiian Islands. Potential distribution maps are based on climate models developed from known localities in its native range and its Hawaiian range. We also present results of analysis of stomach contents of a sample of(More)
The erythrina gall wasp (EGW), believed native to Africa, is a recently described species and now serious invasive pest of Erythrina (coral trees) in tropical and subtropical locales. Erythrina are favored ornamental and landscape trees, as well as native members of threatened ecosystems. The EGW is a tiny, highly mobile, highly invasive wasp that deforms(More)
The alien plant problems of Haleakala National Park are substantial but may be fewer than those of otherHawaìian natural areas, partly because most of the Park is at high elevation (75% above 5,000 ft or 1,525 m). However, potential problems with alien plants are still not clear because of the suppression of all vegetation by intense herbivory by feral(More)
Maui is the Hawaiian island where efforts to combat Miconia calvescens were first mobilized. An alarm of M.c.'s presence on Maui was first raised in 1991, about 20 years after its original introduction to the island. This alarm was taken seriously (based solely on M.c.'s track record in Tahiti), and removal of the seven known populations in lowland,(More)
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