Characterisation and authentication of A. senegal and A. seyal exudates by infrared spectroscopy and chemometrics

Vanloot, Pierre; Dupuy, Nathalie; Guiliano, M.; Artaud, Jacques

doi:10.1016/j.foodchem.2012.06.125

Cited by 31 publications

(7 citation statements)

References 25 publications

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“…32 The range between 1200 and 1500 cm −1 results from coupling of the deformation vibrations of groups containing hydrogen atoms, namely CCH, HCH, COH, and HCO. 28 As can be seen in Fig. 1, these bands in this range were 1249.61, 1375.02, and 1424.40 cm −1 .…”

Section: Chemical Compositionmentioning

confidence: 61%

“…The observed signals between 950 and 1200 cm −1 refer to stretching vibration of alcoholic CO in COH bands in carbohydrates . The range between 1200 and 1500 cm −1 results from coupling of the deformation vibrations of groups containing hydrogen atoms, namely CCH, HCH, COH, and HCO . As can be seen in Fig.…”

Section: Resultsmentioning

confidence: 86%

“…27 The peaks diagnosed between 800 and 1200 cm −1 are called a fingerprint or anomeric area for carbohydrates. This region is sensitive to conformational and configurational transformations of polysaccharides 28 and can be used as a measure of structural differences in the various polymers. For example, Guiliano et al 29 differentiated Acacia senegal gum and Acacia seyal using the relative intensities of this region.…”

Section: Chemical Compositionmentioning

confidence: 99%

See 2 more Smart Citations

Characterizations and rheological study of the purified polysaccharide extracted from quince seeds

Rezagholi¹,

Hashemi

Gholamhosseinpour

et al. 2018

J Sci Food Agric

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Section: Chemical Compositionmentioning

confidence: 61%

Section: Resultsmentioning

confidence: 86%

Section: Chemical Compositionmentioning

confidence: 99%

See 1 more Smart Citation

Characterizations and rheological study of the purified polysaccharide extracted from quince seeds

Rezagholi¹,

Hashemi

Gholamhosseinpour

et al. 2018

J Sci Food Agric

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show abstract

“…The peaks at 850 and 1256 cm -1 derived from the bending vibration of C-O-S of sulfate in axial position and stretching vibration of S-O of sulfate, respectively (Gan et al 2011). The signals in the region of 1200-1500 cm -1 were mainly due to coupling of the deformation vibrations of groups containing hydrogen atoms, including HCH, CCH, HCO, and COH (Vanloot et al 2012). Table 1 shows the proximate composition of native and partially hydrolyzed fucoidans.…”

Section: Resultsmentioning

confidence: 99%

Improved immunomodulatory and antioxidant properties of unrefined fucoidans from Sargassum angustifolium by hydrolysis

et al. 2017

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The effect of polymer degradation was studied on immunomodulatory and antioxidant properties of fucoidan isolated from . Partially hydrolyzed fucoidans were prepared using 0.01 N hydrochloric acid after incubation for 10 and 15 min in boiling water. FT-IR analysis showed two major peaks at 850 cm corresponding to bending vibration of C-O-S of sulfate and 1256 cm derived from the stretching vibration of S-O. The native fucoidan consisted mainly of carbohydrate (49.4%), sulfate (22.9%), uronic acid (10.3%) and minor amount of protein (4.1%). The hydrolysis reduced the molecular weight of native fucoidan from 421 × 10 g/mol to 104.1 × 10 g/mol after 10 min boiling and 63.9 × 10 g/mol after 15 min boiling, without a significant change in their chemical compositions. Acid degradation increased the specific volume of gyration from 0.84 to 3.32 cm/g in hydrolyzed fucoidan polymers. Fucoidan with the lowest molecular weight showed the greatest proliferating effect on RAW264.7 cells and induced the macrophage cells to release more nitric oxide (39.0 μmol) at 50 μg/mL. The DPPH radical scavenging activity, ABTS radical scavenging activity and reducing power remarkably increased after hydrolysis. The current results showed that molecular weight has determinant effect on immunomodulatory and antioxidant activities of unrefined fucoidan and thus acid hydrolysis can be applied on commercial scale to obtain fucoidans with more beneficial effects.

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“…The assignments of IR bands corresponding to gum arabic are discussed in reference literature. [32][33][34][35][36] The functional groups of gum arabic are responsible for the formation of a corona on the particles consisting of more layers of this biopolymer. The mechanism of the corona formation includes the interactions of gum arabic from nucleation to the crystal growth of particles.…”

Section: Low Ementioning

confidence: 99%

The Effect of Gum Arabic on the Nano / Microstructure and Optical Properties of Precipitated ZnO

Petrović¹,

Ristić²,

Musić³

et al. 2017

Croat. Chem. Acta

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The development of the nano/microstructure of ZnO particles precipitated from zinc acetylacetonate showed dependence on the presence of gum arabic. In the absence of gum arabic in near-neutral pH range ZnO rods, some of them hollow, precipitated, whereas in alkaline (NH4OH) medium the multipods (stars) were obtained. A strong effect of gum arabic was noticed both in the near-neutral pH range and in alkaline (NH4OH) medium. In both cases ZnO particles consisted of 1D subunits. The FT-IR spectra of ZnO particles precipitated in the presence of gum arabic showed the IR bands due to the residual content of this biopolymer. Gum arabic formed the corona on ZnO particles and played a key role in the precipitation process from nucleation to the final ZnO product. UV/Vis spectra were also recorded. The PL spectra of ZnO powders dispersed in pure ethanol were very similar. In the presence of ethanol characteristic peaks in the blue emission region were diminishing, thus softening the intrinsic defects responsible for this emission. It was assumed that this effect was due to the covering of oxygen vacancies (VO) at the interface ZnO/C2H5OH with the oxygen atoms present in ethanol.

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Characterisation and authentication of A. senegal and A. seyal exudates by infrared spectroscopy and chemometrics

Cited by 31 publications

References 25 publications

Characterizations and rheological study of the purified polysaccharide extracted from quince seeds

Characterizations and rheological study of the purified polysaccharide extracted from quince seeds

Improved immunomodulatory and antioxidant properties of unrefined fucoidans from Sargassum angustifolium by hydrolysis

The Effect of Gum Arabic on the Nano / Microstructure and Optical Properties of Precipitated ZnO

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