ilicifolia samples in the solid state. The 1H solution NMR spectra of the extracts of each M. ilicifolia sample were acquired in a Varian Mercury 300 spectrometer, operating at a 1H frequency of 300 MHz. The analyses were carried out at 40 °C, with a recycle delay of 1 s, using deutered water as solvent. The acquisition time was 3.3 s and the spectral width was 5200 Hz for the samples of M. ilicifolia extracts. The TGA curves for all M. ilicifolia samples in solid state were shown in Fig. 1. All samples presented almost no significant loss of weight at temperatures below 200 °C, which might be associated with water this website and volatile content components. From 200 to 300 °C, the weight

loss behaviour was similar for all samples in relation to identical degradation processes of the polysaccharide components, such as cellulose and hemicellulose ( Li et al., 2001, Li et al., 2002 and Soares et al., 2001). From 350 to 700 °C, some similar behaviour between the curves of samples A and C can be seen. Sample

B presented a more accentuated weight loss between 320 and 450 °C than do samples A, C and D. This temperature range can be attributed to a weight loss of lignin. The behaviour of sample D was also distinct from samples GSK1210151A A and C at temperatures from 350 to 700 °C. The thermogravimetric curves indicate that the weight loss of samples A and C behaves similarly, which can probably be attributed to the similarity in the chemical structural organisation. Fig. 2 shows the FTIR spectra of all herb samples, with bands related to molecular vibrations located at 671, 1024, 1510, 1608, 1724, 2355, 2918, 3290 and 3726 cm−1. For samples A and C, some Rolziracetam similarity of the FTIR bands are observed at 1024, 1510, 1608, 2918, 3290 and 3726 cm−1, corresponding to CH and C–C angular deformations and bending vibrations, CH2 scissor and C C stretching vibrations, CH2 axial deformation, NH + OH associated and NH + OH non-associated, respectively (Soares et al., 2001; Silverstein, Webster, & Kiemle, 2006).

Comparing the bands of samples A and D shows the presence of a slightly pronounced band at 1724 cm−1 in sample D. This band corresponds to axial deformation of C O. This difference suggests a structural organisation differentiation between the two samples. On the other hand, comparing the bands with samples A and B shows a difference in the band located at 2918 cm−1, which corresponds to axial deformation of CH2. For sample B, the band is practically absent, a result that can indicate a difference in the molecular structural organisation of the two samples. These results confirm that samples A and C similar behaviour, which is the same result in their chemical structural organisation and support the results already found for TGA. Fig. 3 shows the relation of the proton spin–lattice relaxation data versus the frequency range varying from 10 kHz to 42.5 MHz obtained by FFC and classic relaxometry techniques.