Characterization of fractional precipitation behavior of galactomannan gums with ethanol and isopropanol

Jian, Honglei; Lin, Xue-Jiao; Zhang, Weian; Zhang, Weiming; Sun, Daquan; Jiang, Jianxin

doi:10.1016/j.foodhyd.2014.02.012

Cited by 56 publications

(37 citation statements)

References 20 publications

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“…In contrast, the guar gum fractions had a lower mannose content (approximately 50%) and higher galactose content (approximately 50%). After the gradual precipitation, the G2 and G3 samples occupied more than 95% of the total purified gum, which is close to the galactomannan yield (95.7%) purified by 33.3% ethanol in Jian et al (2014). Similar to the above, the yield of the G1 sample with almost the same chemical components was only 3.1%, indicating that 10% ethanol aqueous solution could not efficiently fractionate the galactomannan gum.…”

Section: Yields and Monosaccharide Compositionsupporting

confidence: 62%

“…By adding the dehydrating agent (ethanol), the dielectric constants of the polysaccharide solutions became lower, inducing the conformational changes in the polysaccharides and then allowing polymer molecules to precipitate under different ethanol concentrations. The morphology of precipitates varies with increasing ethanol concentration from random coil conformation to insolubilization with different molecular size and structure (Jian et al 2014). However, the values of molecular weight are supposed to be a little higher due to the formation of aggregations in the purification process as compared with data from other reports (Jian et al 2011a;2014).…”

Section: Molecular Weight and Distributionmentioning

confidence: 82%

“…The morphology of precipitates varies with increasing ethanol concentration from random coil conformation to insolubilization with different molecular size and structure (Jian et al 2014). However, the values of molecular weight are supposed to be a little higher due to the formation of aggregations in the purification process as compared with data from other reports (Jian et al 2011a;2014). It is possible that precipitation with cold acetone promoted aggregate formation by dehydrating the polysaccharide and promoting intra-molecular associations; alternatively, freeze-drying contributed to polysaccharide aggregation.…”

Section: Molecular Weight and Distributionmentioning

confidence: 88%

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Physicochemical Characteristics of Gradual Fractionation Ingredients of Industrial Galactomannan Gums from Gleditsia microphylla and Cyamopsis tetragonoloba

Liu¹,

Xing²,

Liu³

et al. 2016

BioResources

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Galactomannan in industrial Gleditsia microphylla and guar gum was successfully fractionated by gradual precipitation in an aqueous solution with increasing ethanol concentrations. The molecular properties of each fraction were characterized, and the galactomannans were added to photopolymerized hydrogels to test their effects on mechanical properties and swelling capacity. In the series fractions of guar gum, the sample precipitated from 20% EtOH solution had the highest yield, mannose to galactose ratio, and viscosity, and it had a slightly lower molecular weight than that precipitated by 30% EtOH. Correspondingly, the best tensile property of its photopolymerized hydrogel was finally detected. In terms of G. microphylla gum, the precipitation in 30% EtOH solution achieved the highest yield, M/G ratio, and molecular weight value, and it exhibited the best rheological property of all the samples. The hydrogel with the addition of this sample also had the best mechanical properties despite its lower hydroscopicity than the blank hydrogel. The unique properties of each fraction could probably lead to their use as biodegradable alternatives in different applications.

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Section: Yields and Monosaccharide Compositionsupporting

confidence: 62%

Section: Molecular Weight and Distributionmentioning

confidence: 82%

Section: Molecular Weight and Distributionmentioning

confidence: 88%

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Physicochemical Characteristics of Gradual Fractionation Ingredients of Industrial Galactomannan Gums from Gleditsia microphylla and Cyamopsis tetragonoloba

Liu¹,

Xing²,

Liu³

et al. 2016

BioResources

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“…Larutan yang digunakan ketika pemurnian natrium alginat pada metode asam menggunakan isopropil alkohol pro-analis sedangkan pada metode kalsium menggunakan etanol teknis. Menurut Jian et al (2014), pengendapan dengan isopropil alkohol lebih efektif dibanding etanol karena isopropil alkohol memiliki atom karbon yang mengikat gugus hidroksil ( -OH) yang juga berikatan dengan dua karbon lain.Konsentrasi isoprofil alkohol yang digunakan semakin tinggi, maka semakin tinggi pula viskositas yang didapatkan. Hal ini disebabkan semakin tinggi konsentrasi isopropil alkohol yang digunakan, kemampuan larutan untuk menarik air dalam natrium alginat semakin baik sehingga viskositas meningkat (Zailanie et al 2001).…”

Section: Viskositasunclassified

Effect of Extraction Methods on Characteristic of SodiumAlginate from Brown Seaweed Sargassum fluitans

Maharani¹,

Husni²,

Ekantari³

2018

Jurnal PHPI

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AbstrakAlginat merupakan metabolit primer yang banyak dibutuhkan industri pangan maupun nonpangan. Metode ekstraksi alginat dari rumput laut berpengaruh pada viskositas dan rendemen yang dihasilkan. Penelitian ini bertujuan untuk mengetahui pengaruh metode ekstraksi terhadap karakteristik dan kualitas natrium alginat Sargassum fluitans serta biaya ekstraksi yang diperlukan. Penelitian ini menggunakan dua metode ekstraksi yang berbeda yaitu metode ekstraksi asam dan kalsium. Parameter kualitas yang dilakukan pengujian meliputi rendemen, kadar air, kadar abu, viskositas, pH, derajat putih, dan analisis gugus fungsi, serta dilakukan pula analisis biaya ekstraksi. Hasil pengamatan menunjukkan bahwa ekstraksi alginat S. fluitans metode asam menghasilkan natrium alginat dengan kualitas yang lebih baik dari metode kalsium namun mengeluarkan biaya yang lebih tinggi. Natrium alginat yang dihasilkan dengan metode asam memiliki nilai viskositas 127,17±11,50 cps dengan rendemen 9,95±0,31% serta kadar air dan kadar abu yang dihasilkan cukup rendah yaitu 9,35±0,31% dan 21,88±0,41%. Kata kunci: asam, kalsium, presipitasi, viskositas Effect of Extraction Methods on Characteristic of SodiumAlginate from Brown Seaweed Sargassum fluitansAbstract Alginate is a primary metabolite that is needed in food and non food industries. Alginate extraction method of seaweed affect on viscosity and yield of the alginate. This study aimed to determine the effect of extraction methods on characteristic and quality of sodium alginate Sargassum fluitans and the extraction cost needed. This study used two different extraction methods which wereacid alginate method and calcium alginate method. Quality parameters observed include yield, moisture content, ash content, viscosity, pH, whiteness index, and functional group analysis, also extraction cost analysis. The results showed that alginate extraction of S. fluitans by alginic acid method produced better sodium alginate quality than using calcium alginate method, but the cost higher. Sodium alginate produced by alginic acid method had high viscosity (127.17±11.50 cps) with yield 9.95±0.31%. The moisture and ash content of the product was low or 9.35±0.31% and 21.88±0.41%, respectively.

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“…22 However, galactomannan is not completely precipitated from the solution due to the presence of low molecular weight fractions which are soluble at high alcohol concentrations. The isolated endosperm of A. pavonina seeds contain the water soluble galactomannan, while the rest of the seed coat and embryo mainly contain pentoses.…”

Section: Galactomannan Isolation and Purificationmentioning

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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Characterization of fractional precipitation behavior of galactomannan gums with ethanol and isopropanol

Cited by 56 publications

References 20 publications

Physicochemical Characteristics of Gradual Fractionation Ingredients of Industrial Galactomannan Gums from Gleditsia microphylla and Cyamopsis tetragonoloba

Physicochemical Characteristics of Gradual Fractionation Ingredients of Industrial Galactomannan Gums from Gleditsia microphylla and Cyamopsis tetragonoloba

Effect of Extraction Methods on Characteristic of SodiumAlginate from Brown Seaweed Sargassum fluitans

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

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