, by mass.The FTIR spectraofpreparedsampleswere collectedby
the use of a Perkin-Elmer System2000 (Waltham,MA, USA)
equipped with deuterated triglycine sulfate (DTGS) and
mercury cadmium telluride (MCT) detector. The assay was
conducted within the wave number range of 400–4000 cm−1
(midinfrared region) using a potassium bromide window,
at room temperature (26 ฑ 1
∘C) [24].