1. Protein pattern changes in Zea mays plants from nitrate / Bhakti Prinsi. [et al.] -- 2. Pesticide-related illness reported to and diagnosed in primary care / Lesley Rushton and Vera Mann -- 3. Effects of increased litterfall in tropical forests / Emma J. Sayer, Jennifer S. Powers, and Edmund V.J. Tanner -- 4. Evolution of warning coloration / Jostein Gohli and Goran Hogstedt -- 5. Chemically diverse toxicants effects on precursor cell function / Zaibo Li. [et al.] -- 6. Estrogen-like activity of seafood from chemical contaminants / Sonia Garritano. [et al.] -- 7. Microbial contamination and chemical toxicity / Jose Mendoza. [et al.] -- 8. Heavy metal tolerance in Stenotrophomonas maltophilia / Delphine pages. [et al.] -- 9. Chemical defense in marine biofilm bacteria / Carsten Matz. [et al.] -- 10. Reverse and conventional chemical ecology in Culex mosquitoes / Walter S. Leal. [et al.] -- 11. Morphogenesis of the rat pre-implantation embryo and environmental toxicant / Karla J. Hutt. [et al.] -- 12. Endosulfan in farming areas of the Western Cape, South Africa / Mohamed A. Dalvie. [et al.] -- 13. Land use regression in Sarnia, 'Chemical Valley', Ontario, Canada / Dominic Odwa Atari and Isaac N. Luginaah -- 14. Chemical and physical properties of saline lakes in Alberta and Saskatchewan / Jeff S. Bowman and Julian P. Sachs.