production of selected secondary metabolites in transformed ...

Al
F i
80
70
60
50
40
30
20
10
0
0
1 2 3 4 5 6 7 8 9 10
Fig.2.: Fluorescence intensity dependence on pH for each complex
pH
The fluorescence intensity can be significantly increased in the presence of cationic
surfactant and small bathochromic shift in excitation spectra is also observed. The
fluorescence is increased in one hour (Fig.3) and after it reaches maximum, it’s stable at least
10 hours. The best positive effect was found for Zephyramine (Fig.4.). No positive effect was
observed for anionic and nonionic surfactants.
20
Ga
In
18
a b
Fig.3.: Comparison of emission spectra time trace for Al-QSA complex without surfactant (a)
and in presence of cationic surfactant Zephyramine (b)
Sborník soutěže Studentské tvůrčí činnosti Student 2006 a doktorské soutěže O cenu děkana 2005 a 2006
Sekce DSP 2006, strana 245
Al
In
Ga
16
14
12
10
8
6
4
2