Raman and FTIR spectroscopic study of carboxymethylated non-starch polysaccharides

Yuen, Sze‐Nga; Choi, Siu‐Mei; Phillips, David Lee; Ma, Ching‐Yung

doi:10.1016/j.foodchem.2008.10.053

Cited by 243 publications

(136 citation statements)

References 19 publications

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“…In the region comprised between 950 and 700 cm −1 , the polysaccharide showed characteristic absorption at 871 and 811 cm −1 . Such fact can be attributed to the presence of D-galactopyranose and D-mannopyranose, respectively, revealing the coexistence of glycosidic bonds [17,18]. Other characteristics common to polysaccharides were observed in the region of 1600 to 800 cm −1 , such as the detection of bands of 1629, 1375, 1021, 871, and 811.…”

Section: Fourier Transform Infrared (Ftir) Spectroscopymentioning

confidence: 93%

Biopolymer from Adenanthera pavonina L. Seeds: Characterization, Photostability, Antioxidant Activity, and Biotoxicity Evaluation

Melo

Geronço

Sousa

et al. 2018

International Journal of Polymer Science

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Plant polysaccharides have been increasingly employed in the pharmaceutical, industrial, and food environments due to their versatile functional properties. In the present investigation, a heteropolysaccharide galactomannan (GAP) was extracted from Adenanthera pavonina L. seeds and characterized by physicochemical analyses to determine its thermal properties, photostability, antioxidant activity, and acute toxicity. GAP was characterized by FTIR, DSC, and TG. The photostability of GAP submitted to artificial UV irradiation was analyzed. Antioxidant activity was evaluated by the DPPH (2,2-diphenyl-1-1-picrylhydrazyl) free radical-scavenging method, while a bioassay method was carried out to study acute toxicity in Artemia salina L. Physical-chemical and functional characteristics of GAP support its potential role in the food and pharmaceutical industries. GAP was photostable under UV irradiation. In vitro GAP antioxidant evaluation showed that it bears free radicalscavenging activity for DPPH radicals. The median lethal concentration (LC 50 ) of GAP was 239.4 mg•mL −1 , indicating that this biopolymer is nontoxic. Such results indicate that this biopolymer presents characteristics of neutrality, photostability, and nontoxicity that are commercially attractive.

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Section: Fourier Transform Infrared (Ftir) Spectroscopymentioning

confidence: 93%

Biopolymer from Adenanthera pavonina L. Seeds: Characterization, Photostability, Antioxidant Activity, and Biotoxicity Evaluation

Melo

Geronço

Sousa

et al. 2018

International Journal of Polymer Science

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“…Another band detected was at 2921 cm -1 indicating -CH stretching. 35 Other common bands for polysaccharides such as bands at 1631, 1377, 1016, 870 and 810 cm -1 were detected in the spectral region between 1600 and 800 cm Figure 6 illustrates drug release profiles from matrices prepared with both polymers (HPMC and galactomannan). Figure 6 also shows that 16.7 wt.% of galactomannan (Batch R 1 ) can control the drug release.…”

Section: Ft-ir Spectrummentioning

confidence: 99%

Adenanthera pavonina galactomannan for controlled delivery of rutin – a preliminary study

Nobre¹,

Soares²,

Vieira³

et al. 2018

Quim. Nova

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publicado na web em 04/04/2018Improving the development of modified release matrix systems strictly depends on selecting an appropriate agent capable of controlling the drug's release. In this study, Adenanthera pavonina galactomannan was investigated as a potential basis for developing a controlled release of rutin. This galactomannan was extracted, purified and characterized by GPC, NMR and FT-IR spectroscopy. C DEPT 135º NMR and HSQC spectra). The sustained-release tablets containing rutin and galactomannan were compared with the extensively investigated hydrophilic matrix HPMC. Drug release analysis revealed similar release mechanism for both matrices. A new formulation for controlled drug delivery from water-swellable matrix systems is proposed.

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“…Ambas as mucilagens, reticulada e não reticulada, apresentaram uma banda forte e larga em 3425 cm -1 , que pode ser atribuída ao estiramento vibracional do grupo O-H de água e álcoois (Silverstein et al, 2006;Pavia et al, 2008;Yuen et al, 2009). Houve uma redução na intensidade das bandas 2920 cm -1 e 2855 cm -1 , as quais são atribuídas às vibrações simétricas e assimétricas do grupamento C-H (Silverstein et al, 2006;Tavares et al, 2011) quando a amostra foi reticulada.…”

Section: Espectroscopia No Infravermelho Com Transformada De Fourier unclassified

Extração, Precipitação E Reticulação Da Mucilagem De Jaracatiá (Carica Quercifolia (A. St.-Hil) Hieron) Para Uso Como Adsorvente De Proteínas

Heidemann¹,

Faccio²,

Quadri³

et al. 2015

Anais Do XX Congresso Brasileiro De Engenharia Química

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RESUMO -A mucilagem é composta quimicamente por água, pectinas, açúcares e ácidos orgânicos, tornando-se viscosa na presença de água. O objetivo deste estudo foi a reticulação da mucilagem de jaracatiá (Carica quercifolia (A. St.-Hil.) Hieron) precipitada, a qual é composta por polissacarídeos naturais, para uso como adsorvente de proteínas, aproveitando assim os produtos da biodiversidade brasileira. Após a extração e precipitação com etanol, a mucilagem foi reticulada com epicloridrina. O rendimento da mucilagem de jaracatiá precipitada e da reticulação, os grupos funcionais antes e após a reticulação e a capacidade de adsorção do reticulado utilizando papaína foram avaliados. O rendimento da mucilagem precipitada em relação a massa de polpa do fruto foi de 1-1,5% e, após a reticulação o rendimento ficou em torno de 20% de mucilagem reticulada em relação à massa inicial de mucilagem precipitada. Os espectros FTIR mostraram que houveram mudanças nas bandas características com a reticulação. A capacidade da adsorção de papaína mostrou-se satisfatória, em torno de 50%.

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Raman and FTIR spectroscopic study of carboxymethylated non-starch polysaccharides

Cited by 243 publications

References 19 publications

Biopolymer from Adenanthera pavonina L. Seeds: Characterization, Photostability, Antioxidant Activity, and Biotoxicity Evaluation

Biopolymer from Adenanthera pavonina L. Seeds: Characterization, Photostability, Antioxidant Activity, and Biotoxicity Evaluation

Adenanthera pavonina galactomannan for controlled delivery of rutin – a preliminary study

Extração, Precipitação E Reticulação Da Mucilagem De Jaracatiá (Carica Quercifolia (A. St.-Hil) Hieron) Para Uso Como Adsorvente De Proteínas

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