... Hydroxyl Tyrosine-phenolic 9. 5-10.5 Amino Cytidine 4.1 Imino Peptides 13 Table 1. Some chemical groups involved in the metal -biomass interactions and their pKas. Source: Eccles, 199 9. Biosorption ... 199 9. The kinetics and mechanism of lead (II) biosorption by powderized Rhizopus olgisporus, World Journal of Microbiology Biotechnology, Vol: 15, No. 2, (April, 199 9), 291 - 298 , ISSN 095 9- 399 3. ... walls and/ or in the cytoplasm) and the necessity to provide nutrients (Modak & Natarajan, 199 5; Sheng et al., 2004; Volesky, 2006). Progress in Biomass and Bioenergy Production 140 increasing...