Contents

#### **Preface XI**



#### Chapter 9 **Biomarkers 165**  Yasser M. Moustafa and Rania E. Morsi

Chapter 11 **Purification of Peptides from** 

Chapter 10 **Quantification of Antimalarial Quassinoids Neosergeolide and Isobrucein B in Stem and Root Infusions of** *Picrolemma sprucei* **Hook F. by HPLC-UV Analysis 187**  Rita C. S. Nunomura, Ellen C. C. Silva, Sergio M. Nunomura, Ana C. F. Amaral, Alaíde S. Barreto, Antonio C. Siani and Adrian M. Pohlit

> *Bacillus* **Strains with Biological Activity 201**  María Antonieta Gordillo and María Cristina Maldonado
