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| 1 | Development of a new method for analyzing free aluminum ions(Al^(3+)) in seafood using HPLC-ICP-MS显示文摘This paper presents a novel method for simultaneous online examination of free aluminum ions(Al3+)in seafood,using solidphase extraction and high-performance liquid chromatography online with inductively coupled plasma mass spectrometry(SPEHPLC-ICP-MS),without post-column reaction.The optimum conditions for chromatographic separation of Al3+were achieved using an IonPac CS5A analytical column with an IonPac CG5A guard column.The mobile phase consisted of 0.040 mol/L LiOH,0.0060 mol/L 2,6-pyridinedicarboxylic acid,and 0.090 mol/L CH3COOH(pH 4.7).The free Al3+ions in seafood were extracted by shaking with the mobile phase at 70°C for 2 h.SPE was conducted using an Oasis MCX,3cc/60 mg,30μm column,which was activated and equilibrated with 2 mL of methanol and 4 mL of deionized water before use.HCl(0.075 mol/L,2 mL)was used to wash inorganic Al from the SPE column.The standard recoveries of Al3+were all above 89%and the relative standard deviations were all below 5%.The proposed method was successfully used for the examination of Al3+in seafood samples,and the results were similar to those obtained using the static equilibrium method. | SHANG DeRong ZHAO YanFang ZHAI YuXiu NING JinSong DING HaiYan SHENG XiaoFeng | 2013 | Chinese Science Bulletin2013，58，35： | 8 |
| 2 | Assessment and Comparison of in vitro Immunoregulatory Activity of Three Astaxanthin Stereoisomers显示文摘In recent years,the immune-modulatory role of all-trans astaxanthin from different pigment sources has been studied.It was reported that all-trans astaxanthin might exist as three stereoisomers,and the composition of all-trans stereoisomers in natural materials differs from that of synthetic products.However,the different biological effects of various all-trans stereoisomers still remain unclear.In the present study,we evaluated the bioactivity of three astaxanthin stereoisomers,(3S,3'S)-trans-,(3R,3'R)-transand meso-trans-astaxanthin,in regulating cell-mediated immune response using mice lymphocytes and peritoneal exudates cells(PECs) systems.After the treatment with three astaxanthin stereoisomers(20 μmol L-1),the lymphocyte proliferation capacity,neutral red phagocytosis of PECs and natural killer(NK) cell cytotoxic activity were comparatively assessed.The results showed that all three astaxanthin stereoisomers significantly promoted lymphocyte proliferation,phagocytic capacity of PECs,and cytotoxic activity of NK cells.Moreover,the(3S,3'S)-trans-astaxanthin exhibited a much higher response than others. | SUN Weihong XING Lihong LIN Hong LENG Kailiang ZHAI Yuxiu LIU Xiaofang | 2016 | Journal of Ocean University of China2016，15，2： | 7 |
| 3 | Study of Chiral Ionic Liquid as Stationary Phases for GC显示文摘 | Xiaojie Sun Jiakun Xu Xiaojie Zhao Yuxiu Zhai Jun Xing | 2013 | Chromatographia . 2013 (15-1)2013，，： | 1 |
| 4 | First observation of domoic acid and its isomers in shellfish samples from Shandong Province,China显示文摘A total of 133 shellfish samples were collected in seven cities of Shandong Province,China,from May to October,2019.The domoic acid(DA)concentrations were determined by liquid chromatographytandem mass spectrometry(LC-MS/MS),and their distribution characteristics were investigated.DA concentration was detected high in over 1/3(36.1%)of the samples of four kinds of shellfish in all three seasons in range from 0 to 102μg/kg.The highest DA concentrations were 102,101,36.7,and 10.2μg/kg in Crassostrea gigas,Chlamys farreri,Mactra veneriformis,and Mytilus edulis,respectively.Geographically,Yantai(22.0μg/kg)and Weihai(16.9μg/kg)showed relatively high concentrations of DA,whereas Rizhao and Dongying presented only 0.85-and 1.76-μg/kg DA,respectively.DA concentrations in the shellfish samples were strongly related to seasonal changes,being significantly higher in autumn and summer than that in spring.The DA risk exposure assessments indicate that dietary seafood consumption did not pose a health threat to general human population.In addition,three isomers(isoA,isoD,isoE)and 5′-epimer DA were detected in 3.00%-15.80%of the shellfish samples.This study is the first to observe DA and its isomers in shellfish samples of Shandong Province.The results demonstrate that DA contamination is very common and should be continuously monitored. | Guanchao ZHENG Haiyan WU Mengmeng GUO Jixing PENG Yuxiu ZHAI Zhijun TAN | 2022 | Journal of Oceanology and Limnology2022，40，6： | 0 |
| 5 | Thermal processing induced release and degradation of paralytic shellfish toxin from mussels Mytilus edulis显示文摘Understanding the risk factors associated with shellfish consumption is a relevant public health concern because of the potential adverse ef fects of paralytic shellfish toxins(PSTs).This work aims to study the effects of the five most common heating treatments(steaming,boiling,frying,water-bath heating,and microwaving),for different processing times and temperature/power settings,on the content of PSTs in mussels(Mytilus edulis)collected in Qinhuangdao,China.The toxin concentration,removal percentages,and toxin distribution in the cooking liquor and meat were examined.The five processing modes effectively accelerated toxin release into the cooking liquor.The average percentage removal was 73.53%±16.50%from tissues.Microwaving led to the most significant toxin degradation among the methods tested.These findings should facilitate risk assessment of PSTs in mussels. | Chenfan DONG Haiyan WU Jixing PENG Mengmeng GUO Yuxiu ZHAI Zhijun TAN | 2022 | Journal of Oceanology and Limnology2022，40，6： | 0 |
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