Investigation of equilibrium solubility of a carob galactomannan

Pollard, Michael; Kelly, R.; Wahl, C.; Fischer, Peter; Windhab, Erich J.; Eder, B.; Amadò, Renato

doi:10.1016/j.foodhyd.2006.08.010

Cited by 46 publications

(35 citation statements)

References 15 publications

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“…As the gel formed, water was lost because of an association of inter-and intra-catenary linear chains in the gel, which became increasingly rigid and produced loss of the liquid phase (Garcı´a-Ochoa & Casas, 2006). Similar behavior to that of W DIS in the FNG has been reported for carob (Ceratonia siliqua), in which W DIS increased as temperature increased from 5 to 85 8C, and dispersable gum increased from 50 to 90% (Pollard et al, 2006). Other hydrocolloids such starch, pectin and carrageenan native and modified have also exhibited similar behavior to the FNG, with maximum SI of 58 g/g water and W DIS of 22.5% at 85 8C (Babic et al, 2006).…”

Section: Swelling Index and Water Dispertionsupporting

confidence: 61%

Physicochemical properties of carboxymethylated flamboyant (Delonix regia) seed gum Propiedades fisicoquímicas de la goma carboximetilada de flamboyán (Delonix regia)

Pacheco-Aguirre

Rosado-Rubio

Betancur‐Ancona

et al. 2010

CyTA - Journal of Food

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The worldwide high consumption of food additives has encouraged to perform research on new species producers of gums or hydrocolloids that can compete with those that are traditionally used, such as flamboyant (Delonix regia) seed gum, a species considered underutilized and of ornamental type. Flamboyant tree seeds were used to obtain a native gum (flamboyant gum (FNG)), which was modified by carboxymethylation (CFG), this reaction was confirmed using Fourier transformed infrared (FTIR) spectroscopy and colorimetric titration. Swelling index and dispersion were evaluated in a range of 30-90 8C. The apparent viscosity (m) was evaluated with a rheometer. Compression strength of the gel (CSG) was measured with a texture analyzer and calorimetric profile with differential scanning calorimetry (DSC). The CFG had a degree of substitution of 0.33 and the FTIR analysis indicated the presence of carboxy-ether groups in the CFG. The modification of the FNG increased dispersion by 66%. Both gums exhibited shear-thinning behaviors although carboxymethylation caused a decrease in viscosity. The DSC showed a state crystalline in the FNG and a state amorphous in the CFG. The modification of the FNG favored hydrogen bridge interactions with water but decreased intra-catenary interactions in the polysaccharide.Keywords: carboxymethylation; Delonix regia; flamboyant; seed gum; functional properties El alto consumo de aditivos alimentarios a nivel mundial incentiva la investigacio´n de nuevas especies productoras de gomas o hidrocoloides que puedan competir con aque´llas usadas tradicionalmente, tal es el caso de la goma de la semilla de flamboya´n (Delonix regia), especie subutilizada y considerada de tipo ornamental. Las semillas de flamboya´n fueron usadas para obtener goma nativa (FNG), la cual fue modificada por carboximetilacio´n (CFG), esta reaccio´n se confirmo´usando espectroscopia de infrarrojo con transformada de Fourier (FTIR) y titulacio´n colorime´trica. El ı´ndice de hinchamiento y la dispersio´n en agua fueron evaluados de 30 a 90 8C. La viscosidad aparente (m) fue evaluada con reo´metro. La fuerza de compresio´n del gel (CSG) fue medida con un analizador de textura y el perfil calorime´trico con un calorı´metro diferencial de barrido (DSC). La CFG tuvo un grado de sustitucio´n de 0,33. La modificacio´n de la FNG incremento´la solubilidad en un 66%. Ambas gomas tuvieron un comportamiento reofluidizante. La carboximetilacio´n ocasiono un decremento de la m. El DSC mostro´un estado cristalino en la FNG y amorfo en la CFG. La modificacio´n de la FNG favorecio´las interacciones puentes de hidro´geno con el agua pero disminuyo´las interacciones intracatenarias en el polisaca´rido.

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Section: Swelling Index and Water Dispertionsupporting

confidence: 61%

Physicochemical properties of carboxymethylated flamboyant (Delonix regia) seed gum Propiedades fisicoquímicas de la goma carboximetilada de flamboyán (Delonix regia)

Pacheco-Aguirre

Rosado-Rubio

Betancur‐Ancona

et al. 2010

CyTA - Journal of Food

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“…Brummer, Cui, and Wang (2003) reported M w ¼ 1.198 Â 10 6 g/mol for a crude LBG. Pollard et al (2007) reported M w ¼ 1.25 Â 10 6 g/mol for a crude LBG (Unipektin). Somewhat higher values are here a result of lower dn/dc values used previously.…”

Section: Discussionmentioning

confidence: 99%

“…GM solubility was determined by a previously used gravimetric method (Pollard et al, 2007). Solutions were prepared at 5 mg/g (wet basis), tempered at 85 1C for 2 h, stored overnight at 5 1C, then centrifuged to remove Table 1 Evaluation of LBG endosperm flours by SEC and rheometry for (a) optimization experiments, (b) commercial LBG products, and (c) single seeds from an isolated tree insoluble cell-wall material (40,000g, 10 min, 25 1C).…”

Section: Gravimetrymentioning

confidence: 99%

Investigation of molecular weight distribution of LBG galactomannan for flours prepared from individual seeds, mixtures, and commercial samples

et al. 2008

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“…20) Nevertheless, the specific activities of this enzyme toward ivory nut mannan and -1,4-mannan from C. fragile were higher than toward guar gum. These facts strongly suggest that rMan5A preferentially hydrolyzes the -1,4-linkage of the non-galactosylated mannan main chain.…”

Section: Expression and Characterization Of Rman5amentioning

confidence: 83%

Analysis of a Clostridium josui Cellulase Gene Cluster Containing the man5A Gene and Characterization of Recombinant Man5A

Sakka

Goto

Fujino

et al. 2010

Bioscience, Biotechnology, and Biochemistry

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Investigation of equilibrium solubility of a carob galactomannan

Cited by 46 publications

References 15 publications

Physicochemical properties of carboxymethylated flamboyant (Delonix regia) seed gum Propiedades fisicoquímicas de la goma carboximetilada de flamboyán (Delonix regia)

Physicochemical properties of carboxymethylated flamboyant (Delonix regia) seed gum Propiedades fisicoquímicas de la goma carboximetilada de flamboyán (Delonix regia)

Investigation of molecular weight distribution of LBG galactomannan for flours prepared from individual seeds, mixtures, and commercial samples

Analysis of a Clostridium josui Cellulase Gene Cluster Containing the man5A Gene and Characterization of Recombinant Man5A

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