Differences in nutrient-use efficiency have been attributed to differences in leaf habit. It has been suggested that evergreens, with their longer-lived leaves, and therefore longer nutrient retention, are more efficient than deciduous species in their use of nutrients. In tropical trees, however, leaf life span is not always a function of whole-tree deciduousness, leading to the proposal that ...

S Baojun BIAN ........................................................................................................................... 2 Zengjing CHEN ........................................................................................................................ 2 Min DAI ...................................................................................................................

[*] D. Wang, H. Luo, R. Kou, M. P. Gil, Prof. Y. Lu Department of Chemical and Biomolecular Engineering Tulane University New Orleans, LA 70118 (USA) Fax: (+1)504-865-6744 E-mail: [email protected] S. Xiao Department of Chemical and Biological Engineering University of Wisconsin Madison, Wisconsin 53706 (USA) Dr. V. O. Golub Advanced Materials Research Institute University of New Orleans New Orlea...