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Journal of Nanomaterials
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Journal of Nanomaterials
/
2014
/
Article
/
Fig 3
/
Research Article
Preparation and Characterization of Kynurenic Acid Occluded in Sol-Gel Silica and SBA-15 Silica as Release Reservoirs
Figure 3
Infrared spectra of KYNA, SiO
2
, and SiO
2
-KYNA samples in the low energy interval (4000–2500 cm
−1
).