67 

 Phase 1 



Plasma Zn concentrations of rats were not affected (P > 

 .05) by Zn or Cu source (Table 6-2) . Plasma Cu 



TABLE 6-2. Mean plasma Zn and Cu concentrations 

 for rats supplemented with different sources of Zn 

 and Cu (|lg/ml) a . 



Sources Zn Cu 



ZnS0 4 2.5 1.0 



ZnMet 2.2 .8 



ZnLys 2.6 .9 



CuO 2.2 .2 b 



CuS0 4 2.5 1.2 C 



CuLys 2J5 1.3 C 



a SEM are as follows: Zn = .75, Cu = .27. 



b,c Means with different subscripts within column and mineral 



differ (P < .05) . 



concentrations, on the other hand, were lower (P < .05) for 

 CuO than CuS0 4 or CuLys supplemented rats. 



There were no main effects (Zn or Cu; P > .05) for the Zn 

 concentrations for most tissues (Table 6-3) . Mean Zn 

 concentrations were relatively constant for all tissues across 

 treatments. Bone Zn concentrations, however, were higher (P 

 < .05) for CuLys than for CuO supplemented rats. 



There was an interaction effect for bone Zn 

 concentrations. Bone Zn concentrations were higher (P < .05) 

 for CuLys than CuS0 4 rats that were supplemented with ZnS0 4 and 

 CuLys supplementation resulted in higher (P < .05) bone Zn 



