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Table 5 Parameters of bioaccumulation for tested NPs according to measured Ce levels above background levels (mg/kg ww) (mean ± SEM) in stomach, intestine and carcass of fish

From: Influence of citrate and PEG coatings on the bioaccumulation of TiO2 and CeO2 nanoparticles following dietary exposure in rainbow trout

 

Stomach

Intestine

Carcass

 

CeO2-UNC

CeO2-CIT

CeO2-PEG

CeO2-UNC

CeO2-CIT

CeO2-PEG

CeO2-UNC

CeO2-CIT

CeO2-PEG

Day10 levels

0.85 ± 0.2

1.47 ± 0.5

1.84 ± 0.7#

0.32 ± 0.06

0.41 ± 0.13

0.35 ± 0.13

0.09 ± 0.04

0.32 ± 0.04#

0.59 ± 0.27#

K2 (day−1)

0.028

0.059

0.058

0.335”

nd^

nd^

nd

nd

nd

K2g

0.007

0.034

0.029

0.313

nd^

nd^

nd

nd

nd

α

0.013

0.034

0.072

0.003

nd^

nd^

nd

nd

nd

BMFk

0.009

0.011

0.025

0.0002

nd^

nd^

nd

nd

nd

BMFkgL

0.041

0.053

0.090

0.0002

nd^

nd^

nd

nd

nd

*BMFss

0.012

0.021

0.034

0.005

0.006

0.006

0.001

0.005

0.011

*BMFss-L

0.044

0.075

0.121

0.017

0.021

0.023

0.005

0.016

0.040

t ½ (day−1)

24.32

11.65

12.04

2.070

 > 42

 > 42

nd

nd

nd

  1. *Assumed steady state; nd: could not be determined due to fast clearance and no appreciable levels above control fish basal level at depuration phase sampling time; nd^; values could not be determined as high levels measured after 42 days of depuration. ”Calculated using limit of detection (LOD, 0.01 mg/kg) as values could only be measured at one sampling point in depuration phase. #Significant difference in uptake compared to uncoated (UNC) NPs (p < 0.050)