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This work aimed to investigate the influence of different coupling agents with …


Biology Articles » Bioengineering » Influence of spacer length on heparin coupling efficiency and fibrinogen adsorption of modified titanium surfaces » Tables

Tables
- Influence of spacer length on heparin coupling efficiency and fibrinogen adsorption of modified titanium surfaces

Table 1

Quantification of NH2 groups per area for different spacer molecules on cp-titanium and on TiO2 powder (amount per powder weight in [nmol/mg] in parenthesis)

Substrate
Number of primary NH2-groups per nm2


APMS
Diamino-APMS
Triamino-APMS
cp-Ti disc
156 ± 16
162 ± 12
134 ± 22
TiO2 powder
20.0 ± 0.5 (84.9 ± 2.1)
18.7 ± 0.5 (78.7 ± 2.0)
17.0 ± 0.3 (71.3 ± 1.3)

Tebbe et al. BioMedical Engineering OnLine 2007 6:31   doi:10.1186/1475-925X-6-31

Table 2

Quantification of heparin immobilised on APMS, Di- and Triamino-APMS modified titania powders


APMS
Diamino-APMS
Triamino-APMS
[ng/cm2]
53.3 ± 3.6
41.2 ± 6.9
32.1 ± 5.7

Tebbe et al. BioMedical Engineering OnLine 2007 6:31   doi:10.1186/1475-925X-6-31

Table 3

Amount of immobilised heparin on different polymer substrates *(dependent on PEO spacer length)

Substrate
Polyurethane-CO2H
Polyurethane-NH2
Polyurethane-PEO
Polyethylene
Heparin [μg/cm2]
1.40 ± 0.08
2.00 ± 0.13
0.24 ± 0.04–0.47 ± 0.08*
4.4 ± 0.1–4.7 ± 0.1

Tebbe et al. BioMedical Engineering OnLine 2007 6:31   doi:10.1186/1475-925X-6-31


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