1. International workshop on genotoxicity monitoring Bioassays Piracicaba, Brazil 2006 Conducted by Prof. Siegfried Knasmueller, Director, Institute for Cancer Research, Medical University of Vienna, Vienna, Austria Prof. Paulo Saldiva, Department of Pathology, University of Sao Paulo, Sao Paulo, Brazil. Dr. Geraldo Stachetti-Rodrigues. Centro Nacional de Pesquisa de Monitoramento e Avaliacao de impacio Ambiental, Brazil. Prof. Rgina Monteira, Gisela de Araga Umbuzeiro, Faculdade de Tecnologia, Universidade Estadual de Campinas,Piracicaba, Brazil

2. Group photo of participants and instructors of the workshop conducted at Piracicaba, Brazil Group photo of participants and instructors of the workshop

3. Prof. S. Knasmueller, Director of workshop Prof. S. Knasmueller, Director Prof. Paulo Saldiva, Co-director

4. Dr. Geraldo Stachetti-Rodrigues - Instructor

5. Participans took a shot break in the lecutr room Participants took a short break from the lab exercise in the hall

6. Professor of the University in Piracicaba giving a lecture to the participants

7. Instructor, S. Misik collecting inflorescences of proper stage of development for treatment

8. Dissecting flower buds to prepare microscope slides Dissecting flower bud for slide preparation

9. Prof. Knasmueller demonstrating the dissecting technique to a participant

10. Various stages of slide preparation, a photographer took pictures Various stages of slide preparation, photographs were taken

11. Instructor, Miroslave Misik demonstrating Stamen hair collection for mutation studies.

12. Scoring stamen hair mutation events under a dissecting microscope

13. pink blue MCN Pink mutation event in stamen-hair and microncleus (MCN) in a tetrad of Tradescantia

14. Scoring the frequency of micronuclei in Tradescantia tetrads

15. Analyzing the frequency of pink mutation events and the micronuclei frequency

16. Two happy participants ready for flower bud dissection with their needles.

17. A busy laboratory atmosphere for slide preparation

18. Data collection and analysis at the end of the workshop on Tradescantia assays