Attalea (plant) important economically. Products extracted from "A. speciosa" were reported to support over 300,000 households in the Brazilian state of Maranhão in 2005, and in 1985 it was estimated to support over 450,000 households throughout the Brazil. Piassava fibres, extracted from the leaf bases of "A. funifera", are commercially important, and generated about US$20 million in annual income to Brazilian farmers in 1996. Attalea (plant) Attalea is a large genus of palms native to Mexico, the Caribbean, and Central and South America. This pinnately leaved, nonspiny genus includes both small palms lacking an aboveground stem and large trees. The genus has
Simultaneously extracted metals and Acid-volatile sulfide Life or Human Health Are Possible." The Ohio Environmental Protection Agency uses [SEM]/[AVS] in sediment quality guidelines for waters in that state. Simultaneously extracted metals and Acid-volatile sulfide Simultaneously extracted metals/Acid-volatile sulfide (SEM-AVS) is an approach used in the field of aquatic toxicology to assess the potential for metal ions found in sediment to cause toxic effects in organisms dwelling in the sediment. In this approach, the amounts of several heavy metals in a sediment sample are measured in a laboratory; at the same time, the amount of acid-volatile sulfide (sulfide which can be liberated from the sediment by treatment