Isolation, purification, and antioxidant activities of polysaccharides from <i>Ziziphus Jujuba cv. Muzao</i>

Ji, Xiaolong; Liu, Fang; Ullah, Niamat; Wang, Min

doi:10.1080/10942912.2018.1425702

Cited by 14 publications

(6 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Due to the direct relationship between phenolic compounds and antioxidant activity, high content of phenolic compounds could be expected. This extract had a high inhibitory effect and these findings are in agreement with those obtained by other researchers ( Choi et al, 2012 ; Gao, Wu, Wang, Xu, & Du, 2012 ; Yu et al, 2012 ; Wang et al, 2016 ; Ji, X, Liu, Ullah, & Wang, 2018 ). It can obviously be resulted that the use of this fruit as a source of bioactive compounds and natural antioxidants is effective in promoting the quality and development of functional foods and nutraceuticals.…”

Section: Resultssupporting

confidence: 93%

“…As tabulated in Table 5 , total phenol content of jujube extract during the storage time decreased by approximately one-third on the 14th day. The adverse effect of environmental parameters on these compounds such as ambient light, oxygen in the head space of the extract storage medium and storage time on the reduction of some phenolic compounds has been reported by several authors ( Gao, Wu, Wang et al, 2012 ; Ji et al, 2018 ; Wang et al, 2016 ). Some researchers extracted phenolic compounds using different solvents ( Mokrani and Madani, 2016 ).…”

Section: Resultsmentioning

confidence: 94%

See 1 more Smart Citation

Modification of sodium alginate by octenyl succinic anhydride to fabricate beads for encapsulating jujube extract

Farahani

Mousavi

Ardebili

et al. 2022

Current Research in Food Science

View full text Add to dashboard Cite

The effect of modification of sodium alginate on the beads properties was investigated and compared with unmodified alginate beads. The effect of storage conditions on the shelf life of the beads was determined. The modification of sodium alginate was achieved with octenyl succinic anhydride (OSA). Antioxidant activity and total phenolic compounds of the jujube extract was evaluated. Some physical and structural properties yield and encapsulation efficiency of the beads were measured. The encapsulation yield of the beads was significantly affected by modification of sodium alginate. The highest yield was observed in the alginate stored at ambient temperature on the day 14th which was 35.21%. The average beads size of alginate was 5.10 and 4.68 mm in modified and unmodified alginate beads, respectively. Modification also had a significant effect on the hardness of the beads. Higher Tg which ensures good product stability in thermal process was clearly seen in the modified beads maintained at ambient temperature. Fourier Transform Infrared Spectroscopy (FT-IR) revealed the existence of OH groups in the extract-loaded beads. These findings have important implications on designing preservation and delivery systems of soluble bioactive compounds of jujube extract to apply in development of new functional foods and drinks.

show abstract

Section: Resultssupporting

confidence: 93%

Section: Resultsmentioning

confidence: 94%

Modification of sodium alginate by octenyl succinic anhydride to fabricate beads for encapsulating jujube extract

Farahani

Mousavi

Ardebili

et al. 2022

Current Research in Food Science

View full text Add to dashboard Cite

show abstract

“…It is well-known that the specific functional groups, e.g., sulfate, amino, hydroxyl, and carboxyl ones, can be related to the antioxidative effect of polysaccharides [ 36 ]. It was found that all the HC samples have the lower activity with respect to DPPH as compared with Vc.…”

Section: Resultsmentioning

confidence: 99%

“…It is noteworthy that HC Mn exhibited the strongest scavenging activity, but HC H2SO4 had the weakest scavenging activity over the entire range of 0.08–2.0 mg/mL. This is due to the fact that the contents of carboxyl and methoxyl groups of uronic acids, as well as the high content of hydroxyl groups positively affect the antioxidant activity of polysaccharides [ 36 , 37 , 38 ]. In addition, it was reported [ 39 ] that the galactose-rich polysaccharides have a relatively high antioxidant activity, which is consistent with our data on the monosaccharide composition.…”

Section: Resultsmentioning

confidence: 99%

Molecular Characteristics and Antioxidant Activity of Spruce (Picea abies) Hemicelluloses Isolated by Catalytic Oxidative Delignification

et al. 2022

View full text Add to dashboard Cite

Spruce (Piceaabies) wood hemicelluloses have been obtained by the noncatalytic and catalytic oxidative delignification in the acetic acid-water-hydrogen peroxide medium in a processing time of 3–4 h and temperatures of 90–100 °C. In the catalytic process, the H2SO4, MnSO4, TiO2, and (NH4)6Mo7O24 catalysts have been used. A polysaccharide yield of up to 11.7 wt% has been found. The hemicellulose composition and structure have been studied by a complex of physicochemical methods, including gas and gel permeation chromatography, Fourier-transform infrared spectroscopy, and thermogravimetric analysis. The galactose:mannose:glucose:arabinose:xylose monomeric units in a ratio of 5:3:2:1:1 have been identified in the hemicelluloses by gas chromatography. Using gel permeation chromatography, the weight average molar mass Mw of hemicelluloses has been found to attain 47,654 g/mol in noncatalytic delignification and up to 42,793 g/mol in catalytic delignification. Based on the same technique, a method for determining the α and k parameters of the Mark–Kuhn–Houwink equation for hemicelluloses has been developed; it has been established that these parameters change between 0.33–1.01 and 1.57–472.17, respectively, depending on the catalyst concentration and process temperature and time. Moreover, the FTIR spectra of the hemicellulose samples contain all the bands characteristic of heteropolysaccharides, specifically, 1069 cm−1 (C–O–C and C–O–H), 1738 cm−1 (ester C=O), 1375 cm−1 (–C–CH3), 1243 cm−1 (–C–O–), etc. It has been determined by the thermogravimetric analysis that the hemicelluloses isolated from spruce wood are resistant to heating to temperatures of up to ~100 °C and, upon further heating, start destructing at an increasing rate. The antioxidant activity of the hemicelluloses has been examined using the compounds simulating the 2,2-diphenyl-2-picrylhydrazyl free radicals.

show abstract

“…It was shown in many studies [ 4 , 32 , 46 ] that plant polysaccharides are able to scavenge free radicals and can be used as natural antioxidants. To determine the ability of antioxidants to scavenge free radicals, DPPH is commonly used, showing the strong absorption at 517 nm [ 4 ].…”

Section: Resultsmentioning

confidence: 99%

Composition and Structure of Aspen (Pópulus trémula) Hemicelluloses Obtained by Oxidative Delignification

et al. 2022

View full text Add to dashboard Cite

In this study, hemicelluloses of aspen wood (Pópulus trémula) were obtained by oxidative delignification in an acetic acid‒water‒hydrogen peroxide medium at temperatures of 70‒100 °C and a process time of 1‒4 h. The maximum polysaccharide yield of up to 9.68 wt% was reported. The composition and structure of the hemicelluloses were studied using a complex of physicochemical methods: gas and gel permeation chromatography, Fourier-transform infrared spectroscopy, 2D nuclear magnetic resonance spectroscopy, and thermogravimetric analysis. The xylose, mannose, galactose, and glucose monomer units were identified in the hemicelluloses by gas chromatography. The weight average molecular weight Mw of the products determined by gel permeation chromatography was found to range within 8932‒33,142 g/mol. The reported Fourier-transform spectra of the hemicelluloses contain all the bands characteristic of heteropolysaccharides; a weak lignin absorption signal in the spectra at 1500‒1510 cm−1 is attributed to a minor content of phenolic fragments in the structure of the obtained hemicelluloses. The use of thermogravimetric analysis established that the hemicelluloses isolated from aspen wood are resistant against heating to temperatures of up to 90–100 °C and, upon further heating up to 400 °C, start destructing at an increasing rate. The antioxidant activity of the hemicelluloses was examined using the compounds that mimic free radicals (1,1-diphenyl-2-picrylhydrazyl) and hydroxyl radicals (salicylic acid). It was found that the activity of all polysaccharides in neutralizing DPPH and hydroxyl radicals is lower than the absorption capacity of vitamin C at all the tested concentrations (0.5, 2, and 5 mg/mL) and attains 81.7 and 82.9%, respectively.

show abstract

Isolation, purification, and antioxidant activities of polysaccharides from Ziziphus Jujuba cv. Muzao

Cited by 14 publications

References 38 publications

Modification of sodium alginate by octenyl succinic anhydride to fabricate beads for encapsulating jujube extract

Modification of sodium alginate by octenyl succinic anhydride to fabricate beads for encapsulating jujube extract

Molecular Characteristics and Antioxidant Activity of Spruce (Picea abies) Hemicelluloses Isolated by Catalytic Oxidative Delignification

Composition and Structure of Aspen (Pópulus trémula) Hemicelluloses Obtained by Oxidative Delignification

Contact Info

Product

Resources

About