Table 1.

(continued)

ID	NPb	Size	ZP	R1c	R2	Coating	NHitd	Class	Prediction	Domain
41	NP45	23	−13.6	29	62	Other	1	Inactive	Inactive	-
42	NP46	33	−14.5	36	106	Other	1	Inactive	Inactive	-
43a	NP47	28	−9.23	32	60	Other	0	Inactive	Inactive	Reliable
44a	NP48	25	−37	29	49	Other	1	Inactive	Inactive	Reliable

^aTest Set

^bThe 44 NPs were obtained from the following studies (Liu et al. 2011; Epa et al. 2012)

^cR1: spin–lattice relaxivity; R2: spin–spin relaxivity

^dNHit: the number of hits identified for each NP across the 64 bioactivity measures (4 cell lines X 4 assays X 4 concentrations)