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| 1 | Microbial reduction of uranium(Ⅵ)by Bacillus sp.Dwc-2:A macroscopic and spectroscopic study显示文摘The microbial reduction of U(VI) by Bacillus sp. dwc-2, isolated from soil in Southwest China,was explored using transmission electron microscopy(TEM), X-ray photoelectron spectroscopy(XPS) and X-ray absorption near edge spectroscopy(XANES). Our studies indicated that approximately 16.0% of U(VI) at an initial concentration of 100 mg/L uranium nitrate could be reduced by Bacillus sp. dwc-2 at pH 8.2 under anaerobic conditions at room temperature.Additionally, natural organic matter(NOM) played an important role in enhancing the bioreduction of U(VI) by Bacillus sp. dwc-2. XPS results demonstrated that the uranium presented mixed valence states(U(VI) and U(IV)) after bioreduction, which was subsequently confirmed by XANES. Furthermore, the TEM and high resolution transmission electron microscopy(HRTEM) analysis suggested that the reduced uranium was bioaccumulated mainly within the cell and as a crystalline structure on the cell wall.These observations implied that the reduction of uranium may have a significant effect on its fate in the soil environment in which these bacterial strains occur. | Xiaolong Li Congcong Ding Jiali Liao Liang Du Qun Sun Jijun Yang Yuanyou Yang Dong Zhang Jun Tang Ning Liu | 2017 | Journal of Environmental Sciences2017，29，3： | 8 |
| 2 | Removal of radioactive cesium from solutions by zinc ferrocyanide显示文摘Adsorption of ^(134)Cs from aqueous solution by zinc fcrrocyanide,and the effect of experimental conditions on the adsorption were investigated.Preliminary results showed that zinc ferrocyanide was very efficient as an absorbent.Over 98% of ^(134)Cs could be removed by zinc ferrocyanide of 0.33 g·L^(-1) from ^(134)Cs solution (Co) of 3.2~160.0 kBq·L^(-1),with adsorption capacities (Q) of 9.6~463.0 kBq·g^(-1).The adsorption equilibrium time was within one hour and the suitable pH ranged 1~10.No significant differences on ^(134)Cs adsorption were observed at 0~50℃,or in solutions containing Ca^(2+),Fe^(3+),Mg^(2+),HCO_3^-,CO_3^(2-),Cl and SO_4^(2-),even though they are 1000 times higher than the anions or cations in groundwater.However,the adsorption rates decreased when solutions contained K^+ or Na^+.The adsorption process could be described by Frcundlich and Langmuir adsorption equations. | LI Bing LIAO Jiali WU Jiaojiao ZHANG Dong ZHAO Jun YANG Yuanyou CHENG Qiong FENG Yue LIU Ning | 2008 | Nuclear Science and Techniques2008，19，2： | 5 |
| 3 | Bioaccumulation characterization of uranium by a novel Streptomyces sporoverrucosus dwc-3显示文摘The biosorption mechanisms of uranium on an aerobic bacterial strain Streptomyces sporoverrucosus dwc-3,isolated from a potential disposal site for(ultra-)low uraniferous radioactive waste in Southwest China,were evaluated by using transmission electron microscopy(TEM),energy dispersive X-ray(EDX)analysis,Fourier transform infrared spectroscopy(FT-IR),X-ray photoelectron spectroscopy(XPS),proton induced X-ray emission(PIXE)and enhanced proton backscattering spectrometry(EPBS).Approximately60% of total uranium at an initial concentration of 10 mg/L uranium nitrate solution could be absorbed on 100 mg S.sporoverrucosus dwc-3 with an adsorption capacity of more than3.0 mg/g(wet weight)after 12 hr at room temperature at p H 3.0.The dynamic biosorption process of S.sporoverrucosus dwc-3 for uranyl ions was well described by a pseudo second-order model.S.sporoverrucosus dwc-3 could accumulate uranium on cell walls and within the cell,as revealed by SEM and TEM analysis as well as EDX spectra.XPS and FT-IR analysis further suggested that the absorbed uranium was bound to amino,phosphate and carboxyl groups of the cells.Additionally,PIXE and EPBS results confirmed that ion exchange also contributed to the adsorption process of uranium. | Xiaolong Li Congcong Ding Jiali Liao Liang Du Qun Sun Jijun Yang Yuanyou Yang Dong Zhang Jun Tang Ning Liu | 2016 | Journal of Environmental Sciences2016，28，3： | 5 |
| 4 | Interaction between uranium and humic acid(Ⅰ):Adsorption behaviors of U(Ⅵ) in soil humic acids显示文摘The adsorption behaviors of uranium on three soil humic acids (HAs), which were extracted from soils of different depths at the same site, were investigated under various experimental conditions. The adsorption results showed that U(Ⅵ) in solutions can be adsorbed by the three soil HAs, with the order of FHA (HA from 5 m depth of soil) >SHA (HA from the surface) >THA (HA from 10 m depth of soil) for adsorption efficiency in each desirable condition, and the adsorption reached equilibrium in about 240 min. Although the maximum adsorption efficiency was achieved at a suitable uranium concentration (10 mg·L-1 U(Ⅵ) for SHA and THA, 20 mg·L-1 U(Ⅵ) for FHA), the adsorption could be described with Langmiur isotherm or Freundlich isotherm equation. The L/S (liquid/solid, mL/g) ratio and pH were important factors influencing the adsorption in our adsorption system besides uranium concentration. The adsorption efficiency decreased with the increase of the L/S ratio and pH at the pH range of 2.0-3.0 for SHA and THA or 2.5-6.0 for FHA. However, no significant difference in adsorption of U(Ⅵ) was observed at the experimental temperature. All the results implied that humic substances have different characteristics in samples even collected at the same site. | WEI Min LIAO Jiali LIU Ning ZHANG Dong KANG Houjun YANG Yuanyou YANG Yong JIN Jiannan | 2007 | Nuclear Science and Techniques2007，18，5： | 4 |
| 5 | Interaction between uranium and humic acid (Ⅱ): complexation, precipitation and migration behavior of U(Ⅵ) in the presence of humic substances显示文摘The complexation, precipitation, and migration behavior of uranium in the presence of humic acid (HA) or fulvic acid (FA) were investigated by cation exchange, ultrafiltration and dynamic experiment, respectively. The results showed that (i) complex equilibrium between the uranium and humic substances was achieved at approximately 72 h, (ii) the coordination number varied from 1:1 to 1:2 ( U(Ⅵ) : humic acid) as pH increased from 3 to 6; and (iii) , while the complex stability constant decreased when temperature increased, but increased with pH value. We found that the precipitation of uranyl could only be observed in presence of HA, and the precipitation was influenced by conditions, such as pH, uranium concentration, temperature, and the HA concentration. The maximum precipitation proportion up to 60% could be achieved in the condition of 40 mg/L HA solution at pH 6. We further observed that the migration behavior of uranium in soil in the presence of humic acid (HA) or fulvic acid (FA) was different from that in the presence of inorganic colloid, and the effect of humic substances (HS) was limited. | LIAO Jiali WEN Wei LI Bing YANG Yuanyou ZHANG Dong KANG Houjun YANG Yong JIN Jiannan LIU Ning | 2013 | Nuclear Science and Techniques2013，24，3： | 3 |
| 6 | Changes of visceral properties and digestive enzymes in the herbivorous marine teleost Siganus canaliculatus fed on different diets显示文摘The rabbitfish Siganus canaliculatus is one of the few cultured herbivorous marine teleosts. To better understand the digestive physiology of this fish and provide data for designing formulated feed using macroalgae as an ingredient, the changes of visceral properties and digestive enzyme activities were investigated after the juveniles were fed on different types of food including raw fish(RF), formulated diet(FD) or macroalgae Enteromorpha prolifra(EP) and Gracilaria lemaneiformis(GL) for eight weeks. The results showed that the hepatosomatic and viscerosomatic indices in the RF and FD groups, as well as the relative intestine length(RIL) in the EP and GL groups, were significantly higher than those in other groups. Additionally, differences in the histological structure of the liver and anterior intestine were also observed among different dietary groups. The hepatic nuclei were displaced to the periphery by lipid inclusions in fish fed RF. The highest levels of mucosal folds were found in the anterior intestines of fish fed macroalgae. Digestive enzyme activity profiles showed obvious fluctuations in the first three weeks, and then leveled off in the following weeks. The levels of protease, lipase and α-amylase in the alimentary tract showed changes related to the levels of dietary protein, lipid and carbohydrate, respectively.Although macroalgae significantly inhibited the activity of protease in the stomach, it increased RIL and the number of mucosal folds in the anterior intestine so as to compensate for the influences on protease activities in the stomach. This study suggests that the digestive tract of rabbitfish can well adapt to different diets, and needs about three weeks to physiologically acclimatize to the nutritional status, thus implying that rabbitfish are somewhat omnivorous. | XIE Dizhi XU Shude WU Qingyang CHEN Fang WANG Shuqi YOU Cuihong LI Yuanyou | 2018 | Acta Oceanologica Sinica2018，37，2： | 3 |
| 7 | Preference of the Herbivorous Marine Teleost Siganus canaliculatus for Different Macroalgae显示文摘The decomposition of a large amount of unexploited macroalgal resource along the coast of China often results in heavy environmental pollution. In order to pave a way of using macroalgae as the dietary ingredient of rabbitfish Siganus canaliculatus, one of a few farmed herbivorous marine teleosts in China, its preference(feeding selectivity) for different macroalgae was determined in this study. Seven seaweed species abundantly inhabiting the coast of east Guangdong Province were exposed simultaneously to rabbitfish juveniles in laboratory(multiple-choice feeding) with their content and absolute intake assayed. It was found that the most preferred algae were Ulva prolifera, Gracilaria lemaneiformis and Chaetomorpha linum, less preferred algae were U. pertusa and Porphyra haitanensis, and least preferred ones were Sargassum fusiforme and Corallina sessilis. Such an order did not change when one to four relatively preferred seaweeds were removed. The preferred seaweeds were richer in protein and soluble sugar thus higher in energy than the least preferred. In addition, this fish was found to favor filamentous and flat algae rather than calcified ones. Accordingly, the richness of nutrients and morphological characteristics determined the preference of S. canaliculatus for tested macroalgae. | YOU Cuihong ZENG Fangui WANG Shuqi LI Yuanyou | 2014 | Journal of Ocean University of China2014，13，3： | 2 |
| 8 | Advances of radical and photo reactions in natural products synthesis显示文摘This review will focus on the recent advances of radical and photo reactions and their applications in the natural products total synthesis. A brief introduction to the development and mechanism of the newly developed radical and photo reactions will be presented. The organization of the each section is based on the type of reactions used. Examples of synthetic applications are discussed to demonstrate the potential of related methodologies and inspire future explorations. | Shuanhu Gao Yuanyou Qiu | 2016 | Science China Chemistry2016，59，9： | 2 |
| 9 | Effects of phenanthrene on hepatic enzymatic activities in tilapia(Oreochromis niloticus ♀×O.aureus ♂)显示文摘The effects of phenanthrene(Phe) on hepatosomatic index(HSI) and hepatic enzymatic activities in hybrid tilapia(Oreochromis niloticus ♀× O.aureus ♂) were investigated via the static freshwater exposure at dosage of 50,100,and 400 μg/L for 4-14 d.Compared with the control group,HSI was significantly decreased(P < 0.05) at 400 μg/L at day 14.Increased enzymatic activities(P < 0.05) were observed for catalase(CAT),glutathione peroxidase(GPx) and superoxide dismutase(SOD) at either 100 or 400 μg/L at day 8 and 14,as well as for CAT at 50 μg/L at day 14,except for GPx at 400 μg/L at day 8.Ethoxyresorufin O-deethylase(EROD) activity was significantly increased(P < 0.05) at all dosage at day 4 as well as at 50 μg/L at day 8,but significantly decreased at either 100 or 400 μg/L at day 14(P < 0.05).Glutathione-S-transferase(GST) activity was not affected.The results suggest that CAT,GPx,SOD and EROD,as well as HSI in tilapia may be used as the biomarkers or indexes for evaluating or monitoring the pollution of polycyclic aromatic hydrocarbons(PAHs) such as Phe. | XU Wenju LI Yuanyou WU Qingyang WANG Shuqi ZHENG Huaiping LIU Wenhua | 2009 | Journal of Environmental Sciences2009，21，6： | 1 |
| 10 | Astatine-211 labeling of protein using TCP as a bi-functional linker: synthesis and preliminary evaluation in vivo and in vitro显示文摘 | Yang Yuanyou Lin Rushan Liu Ning | 2011 | Journal of Radioanalytical and Nuclear Chemistry2011，288，1： | 1 |
| 11 | Online buying behavior: a transaction cost economics perspective显示文摘 | Thompson S.H. Teo Yuanyou Yu | 2004 | Omega2004，，5： | 1 |
| 12 | Preparation and Preliminary Evaluation of211At Labeled Amidobisphophonates显示文摘 | Yang Yuanyou Liu Ning Liao Jiali | 2010 | Journal of Radioanalytical and Nuclear Chemistry2010，283，： | 1 |
| 13 | Astatine-211 labeling of insulin: Synthesis and preliminary evaluation in vivo and in vitro显示文摘 | Liu Ning Yang Yuanyou ZanLiangbiao | 2007 | J Radioanal and NuclChem2007，272，1： | 1 |
| 14 | Biosorption of americium-241 by Saccharomyces cerevisiae显示文摘 | LIU Ning LUO Shunzhong YANG Yuanyou | 2002 | Journal of Radioanalytical and Nuclear Chemistry2002，252，1： | 1 |
| 15 | Biosorption of 241Am by immobilized Saccharomyces cerevisiae显示文摘 | LIU Ning YANG Yuanyou LUO Shunzhong | 2003 | Journal of Radioanalytical and Nuclear Chemistry2003，258，6： | 1 |
| 16 | Effects of n-3HUFA content in broodstock diet on spawning performance and fatty acid composition of eggs and larvae in Plectorhynchus cinctus显示文摘 | Li Yuanyou Chen Weizhou Sun Zewei | 2005 | Aquaculture2005，245，14： | 1 |
| 17 | Effects of phenanthrene on hepatic enzymatic activities in tilapia 显示文摘 | XU Wenju LI Yuanyou WU Qingyang | 2008 | Journal of Environmental Sciences2008，6，： | 1 |
| 18 | Online buying behavior: A transaction cost econolnics perspective 显示文摘 | Thompson S H Teo Yuanyou Yu | 2005 | Omega2005，33，： | 1 |
| 19 | Online buying behavior:a transaction cost economics perspective显示文摘 | Teo T S H Yu Yuanyou | 2005 | Omega2005，33，： | 1 |
| 20 | Study on forming characteristcs of metal sheet by laser shock in ob- lique angle 显示文摘 | Yinfang Jiang Fei Wang Yuanyou Zhu | 2010 | Key Engineering Materials2010，，： | 1 |
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