Structural Characteristics and Antioxidant Activities of Oligosaccharides from Longan Fruit Pericarp

AbstractPectin is a kind of natural and complex carbohydrates which is extensively used in food, chemical, cosmetic, and pharmaceutical industries. Fresh sunflower (Helianthus annuus L.) heads were utilized as a novel source of pectin extracted by ammonium oxalate. The conditions of the extraction process were optimized implementing the response surface methodology. Under optimal extraction parameters (extraction time 1.34 h, liquid–solid ratio 15:1 mL/g, ammonium oxalate concentration 0.76% (w/v)), the maximum experimental yield was 7.36%. The effect of spray-drying and freeze-drying on the physiochemical properties, structural characteristics, and antioxidant activities was investigated by FT-IR spectroscopy, high performance size exclusion chromatography, and X-ray diffraction. The results showed freeze-drying lead to decrease in galacturonic acid (GalA) content (76.2%), molecular weight (Mw 316 kDa), and crystallinity. The antioxidant activities of pectin were investigated utilizing the in-vitro DPPH and ABTS radical-scavenging systems. This study provided a novel and efficient extraction method of sunflower pectin, and confirmed that different drying processes had an effect on the structure and properties of pectin.

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Structural Characteristics and Antioxidant Activities of Fucoidans from Five Brown Seaweeds

Journal of Applied Glycoscience ◽

10.5458/jag.jag.jag-2015_024 ◽

2016 ◽

Vol 63 (2) ◽

pp. 31-37 ◽

Cited By ~ 9

Author(s):

Katsumi Ajisaka ◽

Tatsuya Yokoyama ◽

Keita Matsuo

Keyword(s):

Antioxidant Activities ◽

Structural Characteristics ◽

Brown Seaweeds

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Structural characteristics and antioxidant activities of polysaccharides from longan seed

Carbohydrate Polymers ◽

10.1016/j.carbpol.2012.09.079 ◽

2013 ◽

Vol 92 (1) ◽

pp. 758-764 ◽

Cited By ~ 27

Author(s):

Guoxiang Jiang ◽

Lingrong Wen ◽

Feng Chen ◽

Fuwang Wu ◽

Sen Lin ◽

...

Keyword(s):

Antioxidant Activities ◽

Structural Characteristics ◽

Longan Seed

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Medicinal properties of jojoba (Simmondsia chinensis)

Israel Journal of Plant Sciences ◽

10.1163/22238980-bja10023 ◽

2021 ◽

pp. 1-10

Author(s):

Zipora Tietel ◽

Shirin Kahremany ◽

Guy Cohen ◽

Navit Ogen-Shtern

Keyword(s):

Antioxidant Activities ◽

Structural Characteristics ◽

Simmondsia Chinensis ◽

Agricultural Crop ◽

Plant Materials ◽

Research Areas ◽

Health Promoting ◽

Medicinal Properties ◽

Cosmetic Formulation ◽

Natural Wax

Abstract Jojoba, Simmondsia chinensis (Link) C.K. Schneider is an evergreen shrub widely grown in Israel, the Middle East, South America, Africa, India and Australia used as an agricultural crop for commercial purposes and as a source of its non-edible natural wax. It is widely used in pharmaceutics and cosmetic formulation due to its unique structural characteristics and beneficial health effects. In addition, extensive work has been published on the plant’s health-promoting activities, ranging from antioxidant activities to the treatment of cancer. Being a rich source of natural liquid wax, the majority of research regarding jojoba focuses on its applications, as well as on the ability to exploit the residual plant materials obtained in its production. To date, several potent phytochemicals have been attributed to its medicinal properties, e.g. simmondsin and phenolic compounds. The current review emphasizes the evidence-based medicinal qualities of the wax and plant extracts and highlights the gaps of knowledge in these research areas and the importance of acquiring additional understanding of jojoba distinctive traits.

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Purification, characterization and antioxidant activities in vitro of polysaccharides from Amaranthus hybridus L.

PeerJ ◽

10.7717/peerj.9077 ◽

2020 ◽

Vol 8 ◽

pp. e9077

Author(s):

Zizhong Tang ◽

Caixia Zhou ◽

Yi Cai ◽

Yujia Tang ◽

Wenjun Sun ◽

...

Keyword(s):

Antioxidant Activity ◽

Antioxidant Activities ◽

Structural Characteristics ◽

Radical Scavenging ◽

Natural Antioxidants ◽

Monosaccharide Composition ◽

In Vitro Test ◽

Amaranthus Hybridus ◽

Total Antioxidant

Background Amaranthus hybridus L. is an annual, erect or less commonly ascending herb that is a member of the Amaranthaceae family. Polysaccharides extracted from traditional Chinese medicines may be effective substances with antioxidant activity. Methods In this study, we isolated crude polysaccharides from A. hybridus (AHP-M) using microwave-assisted extraction. Then, the AHP-M was purified by chromatography with DEAE-32 cellulose, and two fractions, AHP-M-1 and AHP-M-2, were obtained. The structural characteristics of AHP-M-1 and AHP-M-2 were investigated, and their antioxidant activities were analyzed in vitro. Results We found that the monosaccharide composition of AHP-M-1 was different from that of AHP-M-2. The molecular weights of AHP-M-1 and AHP-M-2 were 77.625 kDa and 93.325 kDa, respectively. The results showed that the antioxidant activity of AHP-M-2 was better than that of AHP-M-1. For AHP-M-2, the DPPH radical scavenging rate at a concentration of 2 mg/mL was 78.87%, the hydroxyl radical scavenging rate was 39.34%, the superoxide anion radical scavenging rate was 80.2%, and the reduction ability of Fe3+ was approximately 0.90. The total antioxidant capacity per milligram of AHP-M-2 was 6.42, which was higher than that of Vitamin C (Vc). Conclusion The in vitro test indicated that AHP-M-1 and AHP-M-2 have good antioxidant activity, demonstrating that A. hybridus L. polysaccharide has immense potential as a natural antioxidants.

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Antioxidant and Ethylene-related Changes in `Chandler' Strawberry Fruit as Influenced by Maturity

HortScience ◽

10.21273/hortsci.39.4.807a ◽

2004 ◽

Vol 39 (4) ◽

pp. 807A-807

Author(s):

Floyd M. Woods* ◽

William A. Dozier ◽

Robert C. Ebel ◽

David G. Himelrick ◽

Cecilia Mosjidis ◽

...

Keyword(s):

Lipid Peroxidation ◽

Antioxidant Activity ◽

Enzyme Activity ◽

Antioxidant Activities ◽

Thiobarbituric Acid ◽

Membrane Lipid ◽

Strawberry Fruit ◽

Signal Molecule ◽

Stage Of Development ◽

Fruit Pericarp

The relationship between fruit maturation and accumulation of hydrogen peroxide (H2 O2), lipid peroxidation, ethylene (C2 H4) production, antioxidant activity (hydrophilic, lipophilic and total) and the antioxidant enzyme ascorbate peroxidase (APX, EC 1.11.1.11) in fruit pericarp tissue of `Chandler' (Fragaria × ananassa Duch.) strawberry were measured. `Chandler' fruit pericarp maturation and ripening were accompanied by a decline in H2 O2 content early in fruit development followed by a rapid accumulation. An increase in membrane lipid peroxidation (thiobarbituric acid reactive substances, TBARS) coincided with accumulation of H2 O2, which preceded a rise in C2 H4 production. In general, antioxidant activity declined as fruit matured and ripened. APX enzyme activity increased by 2-fold and peaked at the pink stage of development and then gradually declined with ripening. H2 O2 may serve as a signal molecule to initiate the cascade of oxidative processes during maturation and ripening. APX enzyme activity during maturation and ripening was not substantial and thus, may not have a role in alleviating accumulation of H2 O2 and subsequent events related to oxidative senescence in fruit pericarp. To our knowledge, this is the first study to present fractionated antioxidant activities (HAA, LAA and TAA) from strawberry pericarp as assessed by the ABTS∼+ radical cation assay. A fundamental understanding of the mechanisms involved in the senescent related-oxidative changes during strawberry fruit ontogeny in relation to quality and nutrition is discussed.

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