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Selective recovery of Th(Ⅳ) from radioactive rare earth waste residue by utilizing MoS_(2)-modified ion-absorbed type rare earth tailings

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Journal of Rare Earths 2024年第9期42卷 1782-1791,I0005页

作者： Xirong Chen xinyu fu Yun Gao Zhiyuan Zeng Bin Huang Xiaoqi Sun Faculty of Materials Metallurgy and Chemistry Jiangxi University of Science and TechnologyGanzhou341000China CAS Key Laboratory of Design and Assembly of functional Nanostructures Fujian Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou350002China fujian Research Center for Rare Earth Engineering Technology Xiamen Institute of Rare Earth MaterialsHaixi InstituteChinese Academy of SciencesXiamen361021China fujian College University of Chinese Academy of SciencesFuzhou350002China Jiangxi Province Key Laboratory of Cleaner Production of Rare Earths Ganjiang Innovation AcademyChinese Academy of SciencesGanzhouJiangxi341000China

In the process of extracting ion-absorbed rare earth ore(IREO),the production of radioactive waste is a major environmental *** address this issue,MoS_(2) was used to modify ion-absorbed rare earth tailings(RET) to synthesize a novel MoS_(2)@RET composite material for the effective handling of radioactive waste generated in IREO separation *** composite material was thoroughly characterized using various analytical techniques,including X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS),thermogravimetry(TG),Fourier-transform infrared(FTIR),scanning electron microscopy(SEM),Brunaue r-Emmett-Teller(BET) and energy dispersive spectroscopy(EDS).By optimizing the operating parameters,the optimal experimental conditions were determined to be pH=3,contact time=60 min,liquid-solid ratio=6 g/L,and initial concentration=150 mg/*** adsorption data fitted well with the pseudo second-order rate *** thermodynamic parameters concerning the adsorption of Th(Ⅳ) were analyzed and *** isotherm model is a more fitting choice for the adsorption process compared to the Freundlich isotherm ***_(2)@RET was used in the acid leachate of IREO waste residue,achieving the separation of Th and rare earth *** mechanism of Th(Ⅳ) adsorption by MoS_(2)@RET was investigated,revealing that the adsorption process involves electrostatic interactions,chemical bonding,and redox *** above research results indicate that MoS_(2)@RET composite materials have application potential in the sustainable treatment of IREO radioactive waste.

关键词： Rare earths Thorium Radioactive waste residue Adsorption Separation

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Utilizing dual-pathway energy transfer in upconversion nanoconjugates for reinforced photodynamic therapy

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Nano Research 2024年第4期17卷 2941-2948页

作者： Ruohao Zhang Yu Lu Yifei Zhou Kehong Lv xinyu fu Jitong Gong Shuang Yao Xiaozhen Wang Jing Feng Hongjie Zhang State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei 230026China College of Chemistry Jilin UniversityChangchun 130012China Department of Breast Surgery General Surgery Centerthe First Hospital of Jilin UniversityChangchun 130021China Department of Chemistry Tsinghua UniversityBeijing 100084China

Enhancing the therapeutic effect of existing treatments or developing new non-invasive treatments are important measures to achieve high-efficiency treatment of malignant *** therapy(PDT)is an emerging treatment modality,and the key for achieving high-efficiency PDT is to select light with strong tissue penetration depth and enhance the generation of reactive oxygen species(ROS).Although the upconversion nanoparticles(UCNPs)modified with the photosensitizers could achieve PDT with strong penetration depth under near-infrared light irradiation,the ROS generated by traditional single-pathway PDT is still ***,we developed a novel nanoconjugate(UCNP-Ce6/AIEgen)for dual-pathway reinforced PDT,in which the UCNPs were co-modified with chlorin e6(Ce6)and luminogen with aggregation-induced emission(AIEgen).Due to the presence of AIEgen,UCNP-Ce6/AIEgen could avoid aggregation-caused luminescence quenching in biological water environments and convert upconversion luminescence(UCL)of UCNPs to Ce6-activatable ***,under the irradiation of 808 nm laser,UCNP-Ce6/AIEgen can not only undergo direct lanthanide-triplet energy transfer to activate Ce6,but also convert the UCL of UCNPs to the light that can activate Ce6 through Fӧrster resonance energy transfer to generate more ROS,thus promoting tumor cell *** work broadens the applications of nanoconjugates of lanthanide-based inorganic materials and organic dyes,and provides a conception for reinforced PDT of tumors.

关键词： upconversion nanoparticle aggregation-induced emission direct lanthanide-triplet energy transfer Förster resonance energy transfer photodynamic therapy

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分数阶耦合系统循环周期边值问题解的存在性

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山东大学学报（理学版） 2024年第4期59卷 45-52,80页

作者：张伟付欣雨倪晋波安徽理工大学数学与大数据学院安徽淮南232001

研究一类新的分数阶耦合系统共振边值问题,考虑循环周期边值条件情形。此时不仅方程是耦合的,边值条件也相互依赖。利用Mawhin连续性定理,得到解的存在性准则,并举例说明主要结论。

关键词：分数阶耦合系统共振边值问题循环周期边值条件 Mawhin连续性定理

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开孔沉箱结构消浪效果和水动力特征试验探究——以日照港岚山港区码头为例

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海岸工程 2024年第1期43卷 38-49页

作者：付新钰王伟王常刚山东港湾交通科技有限公司山东青岛266061 中建筑港集团有限公司山东青岛266061

由于开孔前墙和消浪室具有强扰动作用,所以开孔沉箱结构具有很好的消浪效果。本文通过日照港岚山港区码头开孔沉箱结构的物理模型试验,研究了沉箱不同开孔位置的消浪效果和水动力特征,分析了不同方案的反射系数和越浪量。结果表明:水位... 详细信息

由于开孔前墙和消浪室具有强扰动作用,所以开孔沉箱结构具有很好的消浪效果。本文通过日照港岚山港区码头开孔沉箱结构的物理模型试验,研究了沉箱不同开孔位置的消浪效果和水动力特征,分析了不同方案的反射系数和越浪量。结果表明:水位对反射系数的影响较大,开孔位置较高的方案,其消浪性能较好,且越浪量较小。选择反射系数和越浪量均较小的设计方案进行了水动力试验,结果表明:水平力最大时对应的浮托力约为最大浮托力的60%;浮托力最大时对应的水平力约为最大水平力的75%;波浪对开孔沉箱的作用主要集中于外壁迎浪侧,内部结构受到的波浪力很小;第二消浪室波浪力小于第一消浪室。

关键词：开孔沉箱反射系数越浪量波浪力

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Drought Planning Research in the United States: An Overview and Outlook

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International Journal of Disaster Risk Science 2013年第2期4卷 51-58页

作者： xinyu fu Zhenghong Tang Jianjun Wu Kevin McMillan Community and Regional Planning Program College of ArchitectureUniversity of Nebraska-LincolnLincolnNE 68588USA Academy of Disaster Reduction and Emergency Management Beijing Normal UniversityBeijing 100875China School of Natural Resources University of Nebraska-LincolnLincolnNE 68588USA

Drought is widely known as an insidious hazard due to its complex and unique characteristics. Drought disasters have brought tremendous economic losses and significant social and environmental impacts to communities across the globe. To further understand the hazard drought poses and provide insights into planning for drought preparedness, this article conducts a thorough literature review of drought hazard and drought planning frameworks within the United States. Two main approaches and three major forms of drought planning are discussed and summarized. Based on this review, a preliminary overview of drought planning status in the United States is presented. This study provides insight into major drought planning literature and establishes a link with drought mitigation and adaptation. The article concludes with discussion and implication for future drought planning and a future research outlook.

关键词： drought hazard insight

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不动杆菌磷脂酶D基因的表达、生物信息学及底物选择性分析

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食品工业科技 2024年第13期45卷 132-139页

作者：吴思怡吴林秀王凡卢梦瑶童欣李敏付新宇胡荣康安徽师范大学生命科学学院安徽芜湖241000 皖南医学院第二附属医院安徽芜湖241000

微生物来源磷脂酶D(Phospholipase D,PLD)因其较高的催化活性和广泛的底物选择谱而成为磷脂合成应用中的热点。本研究以Acinetobacter ***-2来源的PLD(ADPLD)为研究对象,首先通过生物信息学分析蛋白序列特征,然后构建重组质粒并在大肠... 详细信息

微生物来源磷脂酶D(Phospholipase D,PLD)因其较高的催化活性和广泛的底物选择谱而成为磷脂合成应用中的热点。本研究以Acinetobacter ***-2来源的PLD(ADPLD)为研究对象,首先通过生物信息学分析蛋白序列特征,然后构建重组质粒并在大肠杆菌中实现异源表达,进一步纯化酶蛋白并分析ADPLD对不同酰基链长磷脂酰胆碱(PC)的底物选择性,最后通过分子对接和分子模拟探究ADPLD的底物识别机制。通过对ADPLD和其他微生物来源的PLD多序列比对和进化树分析表明,ADPLD与链霉菌来源PLD序列相似度低于30%,且只有一个保守的HKD基序,这表明ADPLD的催化机制可能与传统认知中需要两个HKD基序完成PLD催化过程的反应机制有所不同。ADPLD主要以可溶性蛋白形式表达,仅通过Ni^(2+)亲和层析在50 mmol/L的低浓度咪唑下便能纯化出较为均一的蛋白,以大豆PC为底物时的比活性约为4.09 U/mg。ADPLD对中和短链PC(C6~C14)的活性相对较高,其中ADPLD对8:0/8:0-PC的比活性高于其它酰基链长的PC底物,为13.2 U/mg。当PC的酰基链长从C14增加至C16时,ADPLD对PC的活性明显降低。分子模拟和分子对接结果显示ADPLD的氨基酸残基Thr205、Pro209、Phe293、Ala324、Lys329和Phe453能够分别与PC形成疏水相互作用。Arg383和Gly326能够与PC形成氢键,其中Arg383(N)、Gly326(N)与PC(P)之间的距离<3Å。这些结果表明,ADPLD能够与磷脂分子形成一个稳定的酶与底物的中间体。研究结果为ADPLD的分子改造和进一步工业应用奠定了基础。

关键词：不动杆菌磷脂酶D 酶学性质蛋白表达磷脂

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山东省农业生产效率动态演进及区域差异研究

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现代农业 2024年第4期49卷 72-80页

作者：付昕雨李业荣段菊英云南农业大学经济管理学院云南昆明650201 云南省丽江市农村经济经营管理站云南丽江674100

探究地区农业生产效率的动态演进趋势、分析区域差异对促进区域农业协同发展具有重要意义。文章分别采用超效率SBM模型、核密度估计法与Dagum基尼系数分解法对2008—2022年山东省16个地市农业生产效率的动态演进特征及区域差异来源进行... 详细信息

探究地区农业生产效率的动态演进趋势、分析区域差异对促进区域农业协同发展具有重要意义。文章分别采用超效率SBM模型、核密度估计法与Dagum基尼系数分解法对2008—2022年山东省16个地市农业生产效率的动态演进特征及区域差异来源进行研究。结果表明:研究期内,山东省总体农业生产效率逐年上升,在空间上呈现鲁中>鲁东>鲁西北>鲁西南的空间格局;总体差异呈现波动上升趋势,区域间差异是构成总体差异的主要来源。据此,提出制定差异化的农业发展策略、缩小区域内和区域间差异的优化措施,以期提升山东省总体农业生产效率水平,促进乡村全面振兴。

关键词：农业生产效率超效率SBM 核密度估计 Dagum基尼系数

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Novel nanocarrier for promoting tumor synergistic therapy by down-regulation of heat shock proteins and increased Fe^(3+) supply

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Science China Chemistry 2023年第4期66卷 1078-1085页

作者： Yu Lu Peng Zhang Yifei Zhou Ruohao Zhang xinyu fu Jing Feng Hongjie Zhang Department of Chemistry Jilin UniversityChangchun 130012China State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130012China Department of Radiology The Second Hospital of Jilin UniversityChangchun 130041China School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei 230026China Department of Chemistry Tsinghua UniversityBeijing 100084China

With the emergence of new therapeutic methods,synergistic therapy has attracted great attention because it can improve the treatment efficacy,and reduce the toxic side ***,we developed a nanocarrier BGT by co-loading glucose oxidase(GOD)and transferrin(TRF)on the porous Bi nanoparticles(NPs)for improving tumor synergistic *** endows BGT with catalytic capacity of decomposing glucose into gluconic acid and a large amount of H2O2 for starving therapy.H2O2 further destroys TRF structure and releases Fe^(3+),which could react with H2O2 to generate highly toxic·OH for chemodynamic therapy(CDT).In addition,GOD-induced glucose depletion and decreased expression of heat shock proteins(HSPs)can also alleviate the thermotolerance of tumor cells to improve the efficiency of mild photothermal therapy(PTT).Mild temperature can in turn promote the production of reactive oxygen species(ROS)for improving the synergistic *** with the excellent targeting ability of TRF,efficient tumor synergistic therapy can be *** work shows that BGT has good photothermal stability and biocompatibility,and can be used as a nanocarrier,providing an effective method for collaborative therapy of tumor.

关键词： nanocarrier mild temperature photothermal therapy starvation therapy chemodynamic therapy

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Nonhuman primate models of focal cerebral ischemia

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Neural Regeneration Research 2017年第2期12卷 321-328页

作者： Jingjing Fan Yi Li xinyu fu Lijuan Li Xiaoting Hao Shasha Li Department of Rehabilitation Medicine West China Hospital Sichuan University Chengdu Sichuan Province China Province Key Laboratory of Rehabilitation Medicine West China Hospital Sichuan University Chengdu Sichuan Province China Department of Neurology West China Hospital Sichuan University Chengdu Sichuan Province China Department of Psychiatry Massachusetts General Hospital Harvard Medical School Boston MA USA Athinoula A. Martions Center for Biomedical Imaging Massachusetts General Hospital Harvard Medical School Boston MA USA

Rodents have been widely used in the production of cerebral ischemia models. However, successful therapies have been proven on experimental rodent stroke model, and they have often failed to be effective when tested clinically. Therefore, nonhuman primates were recommended as the ideal alternatives, owing to their similarities with the human cerebrovascular system, brain metabolism, grey to white matter ratio and even their rich behavioral repertoire. The present review is a thorough summary of ten methods that establish nonhuman primate models of focal cerebral ischemia; electrocoagulation, endothelin-1-induced occlusion, microvascular clip occlusion, autologous blood clot embolization, balloon inflation, microcatheter embolization, coil embolization, surgical suture embolization, suture, and photochemical induction methods. This review addresses the advantages and disadvantages of each method, as well as precautions for each model, compared nonhuman primates with rodents, different species of nonhuman primates and different modeling methods. Finally it discusses various factors that need to be considered when modelling and the method of evaluation after modelling. These are critical for understanding their respective strengths and weaknesses and underlie the selection of the optimum model.

关键词： nerve regeneration stroke cerebral ischemia middle cerebral artery occlusion nonhuman primates model selection neural regeneration

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外科正畸联合治疗下颌第二磨牙低位阻生伴牙源性纤维瘤1例

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口腔医学研究 2024年第7期40卷 648-650页

作者：张宁波王天晓严凤许森傅心宇任利玲兰州大学口腔医院正畸科甘肃兰州730000

牙源性纤维瘤(odontogenic fibroma, OF)是一种少见的间充质牙源性良性肿瘤,常与未成熟或移位的牙齿有关。本文报道了1例OF伴发下颌第二磨牙阻生通过外科正畸联合治疗,成功牵引出磨牙的病例,并结合以往的文献讨论牙源性纤维瘤伴阻生磨... 详细信息

牙源性纤维瘤(odontogenic fibroma, OF)是一种少见的间充质牙源性良性肿瘤,常与未成熟或移位的牙齿有关。本文报道了1例OF伴发下颌第二磨牙阻生通过外科正畸联合治疗,成功牵引出磨牙的病例,并结合以往的文献讨论牙源性纤维瘤伴阻生磨牙的治疗。

关键词：牙源性纤维瘤片段弓技术悬臂架阻生磨牙牵引

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