Antioxidant and antimicrobial activities of Polygonum cognatum Meissn extracts

The antioxidant activities, reducing powers, 2,2‐diphenyl‐l‐picrylhydrazyl (DPPH) radical‐scavenging activities, total phenolic compound contents and antimicrobial activities of ether, ethanol and hot water extracts of Polygonum cognatum Meissn were studied in vitro. The highest antioxidant activity was found in the water extract. However, there were no statistically significant differences among 15 µg ml^?1 extract‐containing samples in linoleic acid emulsion (0.02 M , pH 7.0) during 120 h of incubation (P > 0.05). The reducing power of the water extract was the highest, but its reducing power was markedly lower than that of ascorbic acid. The highest DPPH radical‐scavenging activity was found in the water extract, with 50% DPPH radical scavenging at a concentration of 100 µg ml^?1 dried water extract, while at the same concentration of dried ethanol extract the value was 12%. Surprisingly, no DPPH radical‐scavenging activity was observed in the ether extract. The concentrations of phenolic compounds found were 0.48, 0.50 and 0.01 µg ml^?1 gallic acid equivalent in 10 µg ml^?1 water, ethanol and ether extracts respectively. The ether and ethanol extracts showed antimicrobial activity against Staphylococcus aureus and Bacillus subtilis. The water extract did not show antimicrobial activity against the studied micro‐organisms. © 2002 Society of Chemical Industry     

Effect of extraction conditions on the antioxidant and antiglycation capacity of carbohydrates from Opuntia robusta cladodes

The extraction and characterisation of six crude polysaccharides from Opuntia robusta cladodes, as well as the assessment of their antioxidant and antiglycation activities in vitro, were examined. In this work, carbohydrates were extracted from defatted cladode's peels and pulps through a sequential extraction method in different aqueous medium (neutral, basic and chelating). The obtained polysaccharides were compared in terms of yield and physicochemical properties. Water‐soluble extracts showed the highest yield, while peel's chelating‐soluble extract gave high galacturonic acid content. Preliminary antioxidant in vitro tests suggested that peel's chelating‐soluble extract presented the highest scavenging activity towards DPPH free radicals and inhibition of linoleic acid peroxidation. Furthermore, all extracted polysaccharides showed good potential in inhibiting the nonenzymatic glycation reaction, particularly on the first 3 days of incubation. The obtained results suggested that Opuntia robusta extracts could be explored as natural antioxidant, especially those extracted with chelating agent.     

IN VITRO ANTIOXIDANT ACTIVITIES OF WATER-SOLUBLE POLYSACCHARIDES EXTRACTED FROM ISARIA FARINOSA B05

The water‐soluble exo‐polysaccharides (WSEPS) and intrapolysaccharides (WSIPS) were prepared from the fermentation broth and mycelia of Isaria farinosa B05, respectively, and their antioxidant activities in vitro were studied by various antioxidant assays, including hydroxyl radical scavenging, superoxide radical scavenging, hydrogen peroxide (H₂O₂) scavenging, metal chelating activities, reducing power and antilipid peroxidation. The results show that the water‐soluble polysaccharides extracted from I. farinosa B05 had a high antioxidant activity in a concentration‐dependent manner (except the activity of antilipid peroxidation). WSIPS quenched hydroxyl radicals at high amounts but not at low amounts; WSEPS did not scavenge hydroxyl radicals. WSEPS and WSIPS had a similar activity in scavenging superoxide radicals. WSIPS had a slightly higher H₂O₂‐scavenging activity than WSEPS before the activity reached 100% at the amount of 10.24 mg. Similar to the result of hydroxyl radical scavenging, WSIPS, but not WSEPS, chelated Fe²⁺. The reductive ability of WSEPS and WSIPS was similar and significant compared with the control at the range of 0.8–6.4 mg. Both WSEPS and WSIPS showed higher antilipid peroxidation activities at low amounts (≤ 0.64 mg) than at high amounts. These results indicate that WSEPS and WSIPS had strong antioxidant activities and can be explored as novel potential antioxidants.     

Effects of blanching, drying and extraction processes on the antioxidant activity of yam (Dioscorea alata)

The effects of blanching, drying and extraction processes on the antioxidant activities of one kind of Taiwanese yam peel, Darsan (Dioscorea alata), were investigated. The antioxidant measurements included total phenolic content, reducing power and α ,α‐diphenyl‐β‐pricryl‐hydrazyl (DPPH) radical‐scavenging activity. The 50% ethanolic, hot water and water extracts from the peel all had much higher antioxidant activities than those extracts from the flesh. Among three extraction methods, 50% ethanolic extraction resulted in the highest antioxidant activities in the peel, while hot water extraction was more appropriate for the flesh. Blanching by immersing the peel in 85 °C water for 30 s caused significant reductions in the antioxidant activities of all the extracts from the peel. Generally speaking, freeze‐dried peel maintained higher antioxidant activities than hot air‐dried peel.     

Influence of pressurised liquid extraction and solid–liquid extraction methods on the phenolic content and antioxidant activities of Irish macroalgae

The efficiencies of pressurised liquid extraction (PLE) and a traditional solid–liquid extraction (SLE) at extracting antioxidant polyphenols from Irish macroalgae Ascophyllum nodosum, Pelvetia canaliculata, Fucus spiralis and Ulva intestinalis were compared. PLE was more effective for extracting polyphenols with acetone/water (80:20); however, when food‐friendly solvents of ethanol/water (80:20) and water were employed, SLE resulted in higher phenolic content in brown macroalgal extracts. For example, the Fucus spiralis SLE water and ethanol/water extracts displayed total phenolic contents (TPCs) of 130.58 ± 2.78 and 142.81 ± 1.77 μg phloroglucinol equivalents (PGE) mg^?1 sample, respectively, compared with TPCs of 90.79 ± 1.16 and 124 ± 6.54 μg PGE mg^?1 sample for the corresponding PLE extracts. All SLE aqueous ethanolic macroalgal extracts possessed higher DPPH radical scavenging abilities (RSA) and ferric reducing antioxidant power (FRAP) than their PLE equivalents . This study indicates that the application of high extraction temperatures (50–200 °C) and pressures (500–3000 psi) used in PLE does not enhance the antioxidant activities of macroalgal extracts relative to SLE extraction. The ability to produce antioxidant food‐friendly macroalgal extracts using SLE could represent significant cost reductions on an industrial scale further enhancing the potential of macroalgal polyphenols to be used in functional food preparations.     

北沙参乙醇分级多糖的理化性质及抗氧化活性研究

采用水提醇沉法分级纯化得到4种北沙参多糖(GLP-30、GLP-50、GLP-70、GLP-剩余),采用傅里叶变换红外光谱、高效液相色谱、凝胶渗透色谱、扫描电镜以及差示扫描量热—热重分析等进行分析,并测定其抗氧化活性。结果表明:4种北沙参多糖均具有多糖的典型基团,但差示扫描量热结果相差较大;各多糖组分分子量随乙醇浓度的增加而降低;不同组分间的多糖得率及单糖含量有一定差异,其中GLP-50得率(5.43%)和半乳糖醛酸含量(2.03%)最高,蛋白含量(7.66%)较高,具有最高的保油性,在清除DPPH自由基和羟基自由基中表现出最高的抗氧化能力。乙醇分级沉淀的方法可用于分级纯化北沙参多糖组分,其中50%乙醇更适宜沉淀制备北沙参多糖,且所得多糖抗氧化性较强。     

Effects of extraction methods on antioxidant activities of polysaccharides from camellia seed cake

Four purified polysaccharides (COP-H, COP-U, COP-E, and COP-A) were obtained from seed cake of Camellia oleifera Abel. by hot water extraction, ultrasonic-assisted extraction, enzyme extraction, and alkali extraction, respectively. Their structural characterizations were determined, and antioxidant activities were investigated. The results of FT-IR demonstrated that the characteristic absorption bands exhibited slight difference among four polysaccharides. HLPC analysis presented that the molecular weights were calculated to be 394, 297, 462, and 429 kDa for COP-H, COP-U, COP-E, and COP-A, respectively. GC–MS analysis showed that the monosaccharide compositions were identical to four polysaccharides, while the molecular ratios exhibited significant difference. Four polysaccharides showed antioxidant activities in a concentration-dependent manner. Among four polysaccharides, COP-E showed a higher scavenging activity on DPPH, hydroxyl radical, and superoxide anion radical. These findings suggest camellia seed cake polysaccharides have potential as a natural antioxidant.     

Radical‐scavenging properties of extracts from the white button mushroom,Agaricus bisporus

BACKGROUND: Agaricus bisporus is the premier cultivated edible mushroom but is usually considered to be of lesser value nutritionally and medicinally compared with other cultivated mushrooms. The objective of this study was to investigate the radical‐scavenging properties of methanolic extracts and the free radical‐processing enzyme activities of water extracts from A. bisporus fruit bodies. Analyses were performed on total fruit bodies from three strains and on separated stipe, cap and gills from one strain, all cultivated experimentally under the same conditions. RESULTS: EC₅₀ values of scavenging ability on 1,1‐diphenyl‐2‐picrylhydrazyl radicals (DPPH^?), scavenging ability on 2,2‐azino‐bis(3‐ethylbenzothiazoline‐6‐sulfonic acid) radical cations (ABTS^?+) and reducing power of methanolic extracts from total fruit bodies ranged between 1.7 and 5.0 and were 1.1–1.9 times higher in a white hybrid than in two wild strains, cream and brown. The gills exhibited higher antioxidant activities relative to the stipe and cap. In water extracts, glutathione peroxidase activities were up to eight times higher than glutathione reductase activities and no difference was observed between strains. Catalase activity was highest in the brown wild strain. The only significant differences in free radical‐processing enzymes between the three parts of the mushroom were higher catalase activity in the gills and lower glutathione reductase activity in the stipe. CONCLUSION: The radical‐scavenging properties of the button mushroom are comparable to those of other edible mushrooms and dependent on the strain and on the section of the fruit body. Copyright © 2008 Society of Chemical Industry     

蛹虫草多糖的提取工艺优化及其抗氧化活性研究

以蛹虫草多糖(Cordyceps militaris polysaccharides,CMP)的提取得率为指标,通过单因素和响应面法对CMP的提取工艺进行优化。采用乙醇分级法,将CMP进行乙醇分级,分别得到4种多糖组分(CMP20、CMP40、CMP60和CMP80),并对不同多糖的得率、组分含量及抗氧化活性进行比较。结果表明,CMP的最优提取条件为温度84℃、液料比33∶1(m L/g)和时间128 min。在此条件下,实际提取得率为7.83%;CMP20、CMP40、CMP60和CMP80的得率分别为7.06%、15.07%、17.83%、25.23%。其中,CMP80的得率最高,蛋白含量最低,仅为1.47%;5种多糖均具有一定的抗氧化活性,CMP60的还原力和DPPH自由基清除率均为最高,CMP80的羟自由基的清除率最高。     

Mechanochemical‐assisted extraction and antioxidant activity of polysaccharides from Ganoderma lucidum spores

Mechanochemical‐assisted extraction (MCAE) method was developed to an effective method for polysaccharides extraction from Ganoderma lucidum spores. The MCAE parameters and the antioxidant activity of polysaccharides were investigated. Through response surface methodology design experiments, the processing conditions were optimised as follows: material/solid reagent (Na₂CO₃) 5 g·g^?1, milling time 20 min, solution/material ratio twenty (mL·g^?1) and extraction time 130 min. Under these conditions, the yield of polysaccharides was (5.92 ± 0.13)%, which was in close agreement with the predicted value. Compared with the heat‐reflux extraction method, the MCAE method had higher extraction yield, shorter extraction time and lower extraction temperature. In addition, the polysaccharides obtained from MCAE exhibit significant antioxidant activity.     

Effects of Ultrasonic Treatment on the Physicochemical Properties and DPPH Radical Scavenging Activity of Polysaccharides from Mushroom Inonotus obliquus

ABSTRACT: An ultrasonic technique was employed to extract polysaccharides from Inonotus obliquus (UPS). The effects of ultrasonic conditions on the recovery and 1, 1-diphenyl -2-picrylhydrazyl (DPPH) radical scavenging activity of UPS were evaluated. The physicochemical properties of UPS were analyzed by differential scanning calorimetry (DSC), scanning electron microscopy (SEM), and UV-visible spectrophotometry. Molecular weights of UPS were determined by gel permeation chromatography (GPC). The optimal ultrasonic conditions to obtain the highest recovery of polysaccharides were 80 min, 75 °C, and 100 w. While the optimal ultrasonic conditions to obtain the strongest DPPH scavenging activity of polysaccharide were 80 min, 95 °C, and 160 w. The differences were found by DSC, SEM, GPC analysis and no apparent differences were found from the UV-vis spectra of the polysaccharides after the ultrasonic treatment, which indicated that ultrasonic treatment might cause the physicochemical changes in UPS conformation and degradation of UPS chain but not the main groups. Ultrasonic technique was an effective method to extract bioactive polysaccharides from I. obliquus (UPS). Practical Application: Polysaccharides from Inonotus obliquus exhibited many biological activities including antitumor, antioxidant, hypoglycemic, immune-stimulating effects, and so on. Ultrasonic treatment is now an usual proceeding technique for the extraction of some bioactive constituents. But there was no information about the effects of ultrasonic treatment on the physicochemical properties and DPPH radical scavenging activity of polysaccharides from I. obliquus until now. Ultrasonic technique was an effective method to extract bioactive polysaccharides from I. obliquus (UPS) according to this study.     

血红铆钉菇多糖超声微波联合提取工艺优化及其抗氧化活性

本文主要研究超声微波联合提取法提取血红铆钉菇最佳工艺条件及其抗氧化活性。通过单因素结合响应面试验,以多糖得率为衡量指标,确定超声微波联合提取法提取血红铆钉菇多糖的最佳工艺条件,并与传统水提法和超声提取法所得多糖的抗氧化活性进行比较分析,从而探究3种提取方法对多糖提取效果的影响。结果表明:超声微波联合提取法提取血红铆钉菇多糖的最佳提取工艺条件为:超声时间8 min、微波时间6 min、微波温度92 ℃、液料比29:1 mL/g,得率为8.69%±0.19%,与传统水提法相比,得率提高12.89%,时间缩短88.33%;与超声提取法相比,得率提高8.63%,时间缩短30.00%;不同提取方法对·OH、DPPH·、ABTS+·、O₂-·清除能力以及总还原力具有显著影响(P<0.05),3种提取方法所得多糖体外抗氧化活性由强至弱依次为:超声微波联合提取法>超声提取法>传统水提法。因此,采用超声微波联合提取法可明显提高血红铆钉菇多糖的抗氧化活性。     

Hypolipidaemic and antioxidant capacities of polysaccharides obtained from Laminaria japonica by different extraction media in diet‐induced mouse model

This study shows the industrial feasibility of using aqueous methods to produce antioxidative and hypolipidaemic polysaccharides from Laminaria japonica (LJP). Comparison was firstly made among the polysaccharides prepared using different extraction media, that is water alone (LJPW) and citric acid (LJPC), sulphuric acid, hydrochloric acid and phosphoric acid. LJPC enabled the highest extract yield (~11% dry weight), bile salt adsorption rate (~59% dry weight), ABTS radical scavenging activity (IC₅₀ value 1.06 mg mL^?1) and ORAC antioxidant activity (341.87 μmol Trolox g^?1). In animal trial using diet‐induced high‐fat mice, oral administration of LJP produced with citric acid (LJPC) at a high dose (200 mg kg^?1 body mass per day) enabled significantly higher serum HDL‐C, lower LDL‐C/HDL‐C and unaltered LDL‐C, whilst a medium dose (100 mg kg^?1 body mass per day) significantly decreased LDL‐C. Administration of LJP produced with water (200 mg kg^?1 body mass per day) significantly lowered serum LDL‐C. Therefore, LJP may provide dose‐dependent pharmacological and therapeutic effects to combat atherosclerosis through their hyperlipidaemic and antioxidant properties.     

The use of an enzymatic extraction procedure for the enhancement of highland barley (Hordeum vulgare L.) phenolic and antioxidant compounds

A multistep enzymatic extraction method was compared with a conventional chemical extraction process to evaluate the phenolic content and antioxidant activity of highland barley (Z2, Zangqing 25; CHQK, Changheiqingke). The main phenolic compound extracted was (+)‐catechin, followed by ferulic acid, p‐coumaric acid, caffeic acid and chlorogenic acid. The multi‐enzymatic digestion yielded a higher retrieval of (+)‐catechin compared to the conventional chemical extraction procedure (P < 0.05). Compounds obtained from the multi‐enzymatic digestion process exhibited significantly higher (P < 0.05) antioxidant activities determined by oxygen radical absorbance capacity (ORAC) and cellular antioxidant activity (CAA) when compared to chemical extracts. These results suggest that highland barley subjected to in vitro multi‐enzymatic digestion exhibits a higher phenolic content and antioxidant activity than the chemical extraction, and this multi‐enzymatic digestion coupled with the CAA assay may be a valuable tool to evaluate the antioxidant potential of wholegrains and fruits, as well as vegetables.     

3 种木耳多糖的抗氧化活性与抑菌能力比较分析

目的：研究玉木耳、黑木耳与毛木耳3 种木耳多糖的抗氧化活性与抑菌能力。方法：利用水提醇沉法获得了3 种木耳的多糖,并测定了其多糖含量;采用分光光度法分别测定了3 种木耳多糖的总抗氧化能力,羟自由基、超氧阴离子自由基、1,1-二苯基-2-三硝基苯肼自由基和亚硝酸根离子清除能力;同时进行了大肠杆菌、金黄色葡萄球菌和枯草芽孢杆菌的抑菌实验。结果：相同提取条件下,玉木耳、黑木耳与毛木耳的粗多糖提取率分别为13.87%、11.26%、7.91%,其中3 种木耳多糖质量分数分别为49.22%、41.50%和37.97%;总抗氧化活性检测结果显示毛木耳多糖的总抗氧化能力最高,黑木耳多糖与玉木耳多糖抗氧化能力相当;其中玉木耳多糖对羟自由基清除能力略强于黑木耳多糖,且二者的超氧阴离子自由基清除能力相当,均强于毛木耳多糖;3 种木耳多糖对DPPH自由基的清除作用较明显,其中玉木耳多糖相对较优,可达80%;此外,黑木耳多糖对亚硝酸根离子的清除能力最好,略优于其他两种木耳多糖。对常见细菌的抑制作用而言,3 种木耳多糖均对大肠杆菌有一定的抑制作用,但黑木耳多糖和毛木耳多糖对金黄色葡萄球菌和枯草芽孢杆菌抑制作用较弱;仅玉木耳多糖对金黄色葡萄球菌和枯草芽孢杆菌有较好的抑制作用。结论：3 种木耳多糖具备各自不同的抗氧化活性与抑菌能力,且差异较为明显。     

Antioxidant activities of aged oat vinegar in vitro and in mouse serum and liver

BACKGROUND: The present study focused on the antioxidant activities of aged oat (Avena sativa L.) vinegar. The antioxidant activities of oat and vinegar have been proved by many previous research studies. It should be noted that oat vinegar, as a novel seasoning, has antioxidant activity. RESULTS: Oat vinegar showed stronger radical scavenging activities, reducing power, and inhibition of lipid peroxidation than rice vinegar. The concentrations of polyphenols and flavonoids in oat vinegar were higher than those in rice vinegar. Ethyl acetate extract of oat vinegar possessed the most varieties of phenolic acids and showed the strongest antioxidant activity compared with ethanol and water extracts. At suitable doses of oat vinegar, the malondialdehyde value was decreased, activities of superoxide dismutase and glutathione peroxidase were promoted, and hepatic damage induced by ⁶⁰Co γ‐irradiation was ameliorated in aging mice. CONCLUSION: Oat vinegar manifested antioxidant activity which was stronger than that of rice vinegar in vitro and the same as that of vitamin E in vivo. Copyright © 2010 Society of Chemical Industry     

Beneficial effect of the unsaponifiable matter from rice bran on oxidative stress in vitro compared with α‐tocopherol

Unsaponifiable matter (UM) was prepared from rice bran using n‐hexane extraction followed by removal of its fatty acid methyl ester with supercritical CO₂ under heat‐stable conditions. The UM was made up of 1% of vitamin E isomers, 28% of γ‐oryzanol and 71% of uncharacterized compounds. The aim of this study was to determine the antioxidant activities of the UM, using α‐tocopherol (α‐T) as a positive control, by measuring the Fe³⁺‐reducing antioxidant power (FRAP), 2,2‐diphenyl‐1‐picrylhydrazyl (DPPH^?) free‐radical‐scavenging property and lipid peroxidation in rat liver microsomes. In addition, the effects of the UM on the tert‐butyl hydroperoxide (t‐BOOH)‐induced cytotoxicity in cultured rat hepatocytes were also investigated. In FRAP assay and DPPH^? free‐radical‐scavenging assay, the results were expressed g^?1α‐T or g^?1 UM. The amount of UM used in lipid peroxidation assay and cytotoxicity assay was the amount required to have equal amounts of total vitamin E isomers in the sample and the control α‐T. The UM, as well as α‐T, exhibited significant antioxidant activities in FRAP, radical‐scavenging and membrane‐lipid oxidation. The FRAP value for total vitamin E isomers in the UM (TVEIUM) was 9.1 times higher than that for α‐T. In terms of their capacities to perform radical‐scavenging and lipid peroxidation, both TVEIUM and α‐T showed similar antioxidant activities. In experiments using cultured rat hepatocytes, the t‐BOOH‐induced lactate dehydrogenase release was significantly inhibited by the addition of 63.5 and 160 µg ml^?1 of TVEIUM treatments (84 and 89%, respectively), and that of 63.5 and 160 µg ml^?1 of α‐T treatment (88 and 93%, respectively). The antioxidant function against oxidative stress of the UM prepared from rice bran may extend its use to being a potential dietary supplement. Copyright © 2004 Society of Chemical Industry     

3 种方法提取的雨声红球藻多糖的理化性质及抗氧化活性比较

以雨声红球藻（Haematococcus pluvialis）为原料,研究超声辅助酸提取、超声辅助碱提取、超声辅助水提取3 种不同提取工艺对雨声红球藻多糖提取效率和产品理化特性的影响,在此基础上对3 种多糖抗氧化活性进行比较分析。结果表明,3 种提取方法所得多糖提取率大小依次为：超声辅助碱提法（9.52%）＞超声辅助酸提法（1.50%）＞超声辅助水提法（1.29%）。傅里叶红外变换光谱分析结果表明,3 种多糖的组成单糖中均包含吡喃糖,成苷的半缩醛羟基主要为α构型,其中以酸提多糖的吸收峰最强。扫描电子显微镜证实了超声辅助碱提法对雨声红球藻细胞壁的破坏程度最大,胞内多糖溶出最多。通过对还原力、1,1-二苯基-2-苦基肼自由基清除能力和·OH清除能力等抗氧化活性的测定,表明3 种多糖均具有一定的抗氧化能力,其中以碱提多糖的综合抗氧化能力最优。由此可见,超声辅助碱提法是一种提取藻多糖较好的方法。     

Antioxidant activity of prebiotic ginseng polysaccharides combined with potential probiotic Lactobacillus plantarum C88

The potential prebiotic properties of Panax ginseng polysaccharides were studied using ten strains of Lactobacillus plantarum isolated from traditional Chinese fermented foods. These probiotics showed different growth characteristics depending on the extract and strain specificity. L. plantarum C88 showed higher cell densities and growth rate when cultured on P. ginseng polysaccharides. In the in vitro antioxidant assay, P. ginseng polysaccharides combined with L. plantarum C88 were found to possess significant DPPH, ABTS and superoxide anion radicals scavenging activities, and acidic polysaccharides showed better antioxidant activity than neutral polysaccharides. Furthermore, we evaluated the antioxidant effect of acidic P. ginseng polysaccharide combined with L. plantarum C88 strain in natural ageing mice in vivo. Acidic P. ginseng polysaccharide and L. plantarum C88 together inhibited the formation of malondialdehyde (MDA) and increased the activities of superoxide dismutase (SOD), glutathione peroxidase (GSH‐Px), catalase (CAT) and total antioxidant capacities (T‐AOC) in a dose‐dependent manner.     

响应面法优化虎斑乌贼内脏多糖提取工艺及抗氧化活性、吸湿保湿性能研究

本文以虎斑乌贼内脏为原料,采用Box-Benhken设计优化盐法提取多糖工艺,并对其体外抗氧化活性和吸湿-保湿性能进行研究。结果表明:虎斑乌贼内脏多糖盐法提取最佳工艺条件为:NaCl浓度2.9%,料液比1:30 (g/mL),提取时间1.8 h,提取温度 80 ℃,在此条件下多糖得率为1.08%。红外光谱分析表明该多糖结构含有α-型糖苷键连接的吡喃型葡聚糖。抗氧化活性显示该多糖具有一定的还原能力,对羟基自由基(·OH)、1,1-二苯基-2-三硝基苯肼自由基(DPPH·)和2,2'-联氨-双(3-乙基苯并噻唑啉-6-磺酸)二胺盐自由基(ABTS+·)均具有一定的清除效果,清除率与多糖浓度呈正相关。尤其是对ABTS自由基清除效果最佳,当多糖浓度为1.0 mg/mL时清除率可达到80%。吸湿保湿结果显示,该多糖的吸湿保湿性能优于常规的保湿剂壳聚糖和聚乙二醇6000。上述结果表明,盐提得到的虎斑乌贼内脏多糖具有天然抗氧化活性和吸湿保湿性能,在功能性食品、药品和化妆品领域具有一定的应用潜力。