Identification of structure and antioxidant activity of a fraction of polysaccharide purified from Dioscorea nipponica Makino

Luo, Dianhui

doi:10.1016/j.carbpol.2007.06.023

Cited by 80 publications

(30 citation statements)

References 16 publications

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“…The scavenging activity of polysaccharides from Aloe barbadensis against superoxide radicals was less than 40% at the concentration of 1.0 mg/ml [28]. At the amount between 0.25 and 2 mg, the effects of Dioscorea nipponica polysaccharides on scavenging superoxide radicals were 27.5-35.52% [29]. Compared to these results, ASP MAE had scavenging activity for superoxide radicals.…”

Section: Scavenging Activity Of Superoxide Radicalmentioning

confidence: 58%

A comparison study on microwave-assisted extraction of Artemisia sphaerocephala polysaccharides with conventional method: Molecule structure and antioxidant activities evaluation

Wang

Zhang

Wang

et al. 2009

International Journal of Biological Macromolecules

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Section: Scavenging Activity Of Superoxide Radicalmentioning

confidence: 58%

A comparison study on microwave-assisted extraction of Artemisia sphaerocephala polysaccharides with conventional method: Molecule structure and antioxidant activities evaluation

Wang

Zhang

Wang

et al. 2009

International Journal of Biological Macromolecules

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“…Each contour line (Figures 4b and 5b) gives the indefinite number of combinations for the other two variables while one variable is at the center. Circular, elliptic or saddle type contour lines based on the coefficients could give maximum point, minimum point, saddle point, stationary peak or increasing/decreasing peak conditions (Luo 2008 response surface shows that contact between the variables is negligible, while elliptical or saddle type surfaces demonstrate that internal contact was significant. The surface limited by the least elliptical or circular shape identify the highest or lowest estimated response (Khuri and Cornell 1996).…”

Section: Response Surface Methods Plotsmentioning

confidence: 99%

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Celik¹,

Camas²,

Camas³

et al. 2016

Turk. J. Fish. Aquat. Sci.

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The biosorption of heavy metals, radionuclides, uranium and thorium for the recovery or removal from aqueous systems using various micro-organisms and biological substances has been investigated by several groups of workers. In this paper, the uptake of uranium (VI) from aqueous systems by a marine sponge, Sarcotragus foetidus (Schmidt, 1862) has been investigated. S. foetidus samples were collected from Babakale/Ayvacık/Canakkale in Turkey. Uranium (VI) uptake experiments were carried out by the batch technique. The affecting parameters were analyzed using Central Composite Design (CCD) as the experimental method. Four independent variables such -pH, temperature, contact time, and initial uranium concentration were selected for this study. The influences of initial pH, contact time, and initial uranium concentration on the biosorption process were considered statistically significant as main effects. On the other hand, interaction effects of pH and contact time, as well as pH and initial uranium concentration, were considered as significant parameters on the biosorption process. The optimum condition of biosorption process was found to be at init"ial pH: 4, temperature: 35°C, initial uranium concentration: 20 mg/L, and contact time: 31 minutes. At these conditions, the biosorption yield of uranium (VI) ions was obtained to be 93.29±2%.Keywords: Marine sponge, Statistical design, Experimental Design, Analysis of variance (ANOVA), biological sorption. Sarcotragus foetidus (Schmidt, 1862) Denizel Süngeri ile Uranyum (VI) Biyosorpsiyonunun Merkezi Kompozit Dizayn ile İstatistiksel Olarak Araştırılması ÖzetMikroorganizmalar ve biyolojik materyaller kullanarak radyonüklitlerin, ağır metallerin, toryum ve uranyum gibi radyoaktif metallerin sulu çözeltilerden geri alınması veya uzaklaştırılması üzerine birçok çalışma vardır. Bu çalışmada, Sarcotragus foetidus (Schmidt, 1862) olarak adlandırılan deniz süngerinin sulu çözeltilerden uranyum alımı istatistiksel olarak araştırıldı. S. foetidus (Schmidt, 1862) deniz süngeri örnekleri Babakale (Ayvacık / Çanakkale) açıklarından toplandı. Uranyum (VI) geri alım denemeleri kesikli yöntem ile gerçekleştirildi. Biyosorpsiyonu etkileyen parametreler Merkezi Kompozit Deneysel Tasarımı (CCD) kullanılarak analiz edildi. Bu çalışma için; pH, sıcaklık, temas süresi ve uranyum başlangıç konsantrasyonu gibi dört bağımsız değişken seçildi. Ana parametrelerden pH, temas süresi ve uranyum başlangıç konsantrasyonu biyosorpsiyon prosesinde istatistiksel olarak anlamlı olarak kabul edildi. Diğer bir yandan; biyosorpsiyon işlemi üzerinde, pH-temas süresi, pH -uranyum başlangıç konsantrasyonu gibi ikili etkileşimler önemli parametreler olarak belirlendi. Biyosorbsiyon prosesinin optimum koşulları; pH:4, sıcaklık: 38 , uranyum başlangıç konsantrasyonu: 20 mg/L ve temas süresi: 31 dakika olarak hesaplandı. Bu koşullar altında biyosorpsiyon verimi % 93.29±2 olarak elde edildi.

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“…Oxidation is essential for a number of biological processes to produce energy in many organisms (Luo, 2008). There is a balance between production and elimination of free radicals.…”

Section: Introductionmentioning

confidence: 99%

Antioxidation and antiglycation of polysaccharides from Misgurnus anguillicaudatus

2011

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Identification of structure and antioxidant activity of a fraction of polysaccharide purified from Dioscorea nipponica Makino

Cited by 80 publications

References 16 publications

A comparison study on microwave-assisted extraction of Artemisia sphaerocephala polysaccharides with conventional method: Molecule structure and antioxidant activities evaluation

A comparison study on microwave-assisted extraction of Artemisia sphaerocephala polysaccharides with conventional method: Molecule structure and antioxidant activities evaluation

Untitled

Antioxidation and antiglycation of polysaccharides from Misgurnus anguillicaudatus

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