First steps in ozone protection agreed

EHPnet: Ozone Protection

Background: The Moraxella catarrhalis Hag protein, an Oca autotransporter adhesin, has previously been shown to be important for adherence of this respiratory tract pathogen to human middle ear and A549 lung cells. Results: The present study demonstrates that adherence of M. catarrhalis isogenic hag mutant strains to the human epithelial cell lines Chang (conjunctival) and NCIH292 (lung) is red...

Stratospheric Ozone Protection Case Study

The Weyerhaeuser Corporation is a large forest products company operating private bare-root nurseries in the United States and British Columbia, Canada (Littke 1994a). Due to concerns over the continued availability of methyl bromide for tree seedling production, Weyerhaeuser formulated a strategy to identify and investigate potential alternatives to methyl bromide including alternatives that r...

The First Steps in Seeing

First Steps in Relational Lattice

Relational lattice reduces the set of six classic relational algebra operators to two binary lattice operations: natural join and inner union. We give an introduction to this theory with emphasis on formal algebraic laws. New results include Spight distributivity criteria and its applications to query transformations.

First Steps in Exploratory Data