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