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Novel reusable sulfate-type zirconium alginate ion-exchanger for fluoride removal

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Chinese Chemical Letters 2021年第11期32卷 3410-3415页

作者： Tao yua Yiliang Chen Yizhong Zhang Xin Tan Tao Xie Boyu Shao Xiang Huang School of Chemical Engineering and Technology Tianjin UniversityTianjin 300350China School of Environmental Science and Engineering Tianjin UniversityTianjin 300350China School of Science Tibet UniversityLhasa 850000China

It is still a challenge to eliminate efficiently fluoride ion from groundwater,especially to design and synthesis an adsorbent possessing high adsorption capacity,recyclability and wide pH application *** we present millimeter-sized sulfate-type zirconium alginate hydrogel beads with 3D network structure(AHB@Zr-SO^(2−)_(4))that exhibited a maximum adsorption capacity of 101.3 mg/g with wide pH applicability(pH 3−9).This material have~2.5 times higher adsorption capacity than that of pure zirconium alginate hydrogel beads(AHB@Zr)and it was ascribed to ion exchange between SO^(2−)_(4)and F−on the surface of AHB@Zr-SO^(2−)_(4),which was verified via ion chromatography measurement coupled with X-ray photoelectron spectroscopy(XPS)and Fourier Transform Infrared Spectrometer(FTIR Spectrometer)*** functional theory(DFT)calculations indicated that the ion exchange process between SO^(2−)_(4)and F−in AHB@Zr-SO^(2−)_(4)was energetically favorable than OH^(−)and F^(−)in AHB@*** addition,310 bed volumes(BV)of effluent was realized via column adsorption of groundwater containing fluoride on AHB@Zr-SO^(2−)_(4)and indicated that it is a promising candidate for mitigating the problem of fluoride-containing groundwater.

关键词： Fluoride ion Zirconium alginate Sulfate Adsorption capacity Ion exchange

Symmetry Energy Effects in a Statistical Multifragmentation Model

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Chinese Physics Letters 2011年第11期28卷 83-86页

作者： ZHANG Lei GAO yua ZHANG Hong-Fei CHEN Xi-Meng Yu Mei-Ling LI Jun-Qing School of Information Engineering Hangzhou Dianzi UniversityHangzhou 310018 School of Nuclear Science and Technology Lanzhou UniversityLanzhou 730000 Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000

The symmetry energy effects on the nuclear disintegration mechanisms of the neutron-rich system(𝐴0=200,𝑍0=78)are studied in the framework of the statistical multifragmentation model(SMM)within its micro-canonical ensemble.A modified symmetry energy term with consideration of the volume and surface asymmetry is adopted instead of the original invariable value in the standard SMM *** results indicate that as the volume and surface asymmetries are considered,the neutron-rich system translates to a fission-like process from evaporation earlier than the original standard SMM model at lower excitation energies,and its mass distribution has larger probabilities in the medium-heavy nuclei range so that the system breaks up more *** the excitation energy becomes higher,the volume and surface asymmetry lead to a smaller average multiplicity.

关键词： excitation symmetry system

The first-principles study on the doping effect of Re in Ni3Al

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Progress in Natural Science:Materials International 2008年第7期18卷 861-866页

作者： Song Yu a,*, Chongyu Wanga,b, Tao yua aCentral Iron and Steel Research Institute, Beijing 100081, China bDepartment of Physics, Tsinghua University, Beijing 100084, China Central Iron and Steel Research Institute Beijing 100081 China Department of Physics Tsinghua University Beijing 100084 China

Using first-principles density function for molecules method (DMol) and discrete variational method (DVM) based on the density functional theory, we studied the doping effect of Re in Ni3Al. The structure relaxation and the alloying energy show that Re has a strong Al site preference and leads to the local deformation, which is in agreement with the experimental results and other theoretical results. In addition, the charge density diffierence and the bond order show that Re can strongly enhance the interatomic interaction between the nearest neighbor atoms. From the density of states and the Pauli spectrum, we find that resonance states and localized states are induced by doping Re, and the doped Re atom forms the hybridized bond with the nearest neighbor atoms.

关键词： The first-principles Re Ni3Al

Bovista helenae-new puffball from Russia

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Studies in Fungi 2016年第1期1卷 142-145页

作者： Rebriev yua Dvadnenko KV Institute of Arid Zones of the South Science Center of Russian Academy of Sciences 344006Rostov-on-DonRussia

A new Bovista from dry steppes of the European part of Russia is *** species is situated in *** has a subhypogeous basidiomes with basal incrusted“cup”like in Disciseda,globose to subglobose asperulate spores 3.2-3.8×3.5-4.5μm with straight not acute pedicels 5-7μm and Bovista-type capillitium with small,straight or funnel-shaped pores which are rare on the main stem but usual on the *** key for Bovista species with basal incrusted“cup”is provided.

关键词： Agaricaceae Bovista tomentosa gasteroid basidiomycetes gasteromycetes Lycoperdaceae puffballs systematics taxonomy

Sodium alginate and naloxone loaded macrophage-derived nanovesicles for the treatment of spinal cord injury

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Asian Journal of Pharmaceutical Sciences 2022年第1期17卷 87-101页

作者： Xiaoyao Liu Xue Jiang Qi yua Wenwen Shen He Tian Xifan Mei Chao Wu Pharmacy School Jinzhou Medical UniversityJinzhou 121001China Department of Orthopedics The First Affiliated Hospital of Jinzhou Medical UniversityJinzhou 121004China Department of Histology and Embryology Jinzhou Medical UniversityJinzhou 121001China

Spinal cord injury(SCI)causes Ca^(2+) overload,which can lead to inflammation and neuronal *** this study,we prepared a nanovesicle derived from macrophage membrane(MVs),which encapsulated sodium alginate(SA)and naloxone(NAL)to inhibit inflammation and protect neurons by reducing the free Ca^(2+) concentration at the SCI *** on the transmission electron microscopy(TEM)image,the encapsulated sample(NAL–SA–MVs)had a particle size of approximately 134±11 nm and exhibited a sustained release *** encapsulation rate of NAL and SA was 82.07%±3.27%and 72.13%±2.61%in NAL–SA–MVs,*** tests showed that the NAL–SA–MVs could accumulate in large quantities and enhance the concentration of SA and NAL at the lesion *** vivo and in vitro studies indicated that the NAL–SA–MVs could decrease the concentration of free Ca^(2+),which should further alleviate the inflammatory response and neuronal ***-inflammation results demonstrated that the NAL–SA–MVs could reduce the pro-inflammation factors(iNOS,TNF-α,IL-1β,IL-6)and increase the expression of antiinflammation factors(IL-10)at the cell and animal ***,fluorescence,flow cytometry and western blot characterization showed that the apoptotic condition of the neurons was significantly *** addition,the motor function of C57 mice were significantly improved after NAL–SA–MVs *** conclusion,it is suggested that the NAL–SA–MVs has tremendous potential in the treatment of SCI.

关键词： Naloxone Sodium alginate Spinal cord injury Macrophage membrane Inflammation Neuroprotection

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N-杂环卡宾:一种多用途有机小分子催化剂

有机化学 2006年第6期26卷 745-756页

作者：孙小宇吴劼复旦大学化学系上海200433

近年来,N-杂环卡宾化学引起了化学家们广泛的研究兴趣,这一切主要归功于Arduengo等的杰出工作,在1991年他们首次成功分离得到了第一个稳定的N-杂环卡宾——咪唑-2-碳烯.这推动了N-杂环卡宾化学的飞速发展.尽管N-杂环卡宾作为配体在金属... 详细信息

近年来,N-杂环卡宾化学引起了化学家们广泛的研究兴趣,这一切主要归功于Arduengo等的杰出工作,在1991年他们首次成功分离得到了第一个稳定的N-杂环卡宾——咪唑-2-碳烯.这推动了N-杂环卡宾化学的飞速发展.尽管N-杂环卡宾作为配体在金属有机化学中已经被广泛研究,然而,对N-杂环卡宾作为反应底物和有机小分子催化剂的研究还有待进一步深入.N-杂环卡宾作为有机小分子催化剂在有机反应中的应用及其研究进展,引起有机化学家对N-杂环卡宾化学这一热点领域的更多关注.

关键词： N-杂环卡宾有机小分子催化剂 Stetter反应极性反转反应

Manipulating selenium molecular configuration in N/O dual-doped porous carbon for high performance potassium-ion storage

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Journal of Energy Chemistry 2021年第11期30卷 581-589,I0014页

作者： Dongjun Li Lifeng Wang Xiaolong Cheng Yu Yao Yu Jiang Pengcheng Shi Ying Wu Xiaojun Wu Cheng Ma Yan yua Hefei National Laboratory for Physical Sciences at the Microscale Department of Materials Science and EngineeringCAS Key Laboratory of Materials for Energy ConversionUniversity of Science and Technology of ChinaHefei 230026AnhuiChina Dalian National Laboratory for Clean Energy(DNL) Chinese Academy of Sciences(CAS)Dalian 116023LiaoningChina School of Materials and Energy Guangdong University of TechnologyGuangzhou 510006GuangdongChina National Synchrotron Radiation Laboratory Hefei 230026AnhuiChina

Potassium-selenium(K-Se)batteries have attracted more and more attention because of their high theoretical specific capacity and natural abundance of K ***,dissolution of polyselenides,large volume expansion during cycling and low utilization of Se remain great challenges,leading to poor rate capability and cycle ***,N/O dual-doped carbon nanofibers with interconnected micro/mesopores(MMCFs)are designed as hosts to manipulate Se molecular configuration for advanced flexible K-Se *** micropores play a role in confining small Se molecule(Se_(2–3)),which could inhibit the formation of polyselenides and work as physical barrier to stabilize the cycle *** the mesopores can confine long-chain Se(Se_(4–7)),promising sufficient Se loading and contributing to higher discharge voltage of the whole Se@MMCFs *** N/O co-doping and the 3D interpenetrating nanostructure improve electrical conductivity and keep the structure integrity after *** obtained Se_(2–3)/Se_(4–7)@MMCFs electrode exhibits an unprecedented cycle life(395 mA h g^(−1) at 1 A g^(−1) after 2000 cycles)and high specific energy density(400 Wh kg^(−1),nearly twice the specific energy density of the Se_(2–3)@MMCFs).This study offers a rational design for the realization of a high energy density and long cycle life chalcogen cathode for energy storage.

关键词： Carbon nanofibers with interconnected micro/mesopores Manipulating Se molecules Heteroatom-doping Flexible K-Se batteries

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车辆变速箱啸叫噪声测试诊断

机械传动 2011年第1期35卷 15-19,37页

作者：陈原上海交通大学机械与动力工程学院上海200240

在汽车NVH研究范围内,动力总成相关的噪声振动一直是研究的一个重要方面,同时也一直是研究的一个困难课题。其原因为该噪声振动往往必须通过正向的动力总成相关部件研究及设计修改来确诊原因并且最终解决问题。通过一个实际案例介绍如... 详细信息

在汽车NVH研究范围内,动力总成相关的噪声振动一直是研究的一个重要方面,同时也一直是研究的一个困难课题。其原因为该噪声振动往往必须通过正向的动力总成相关部件研究及设计修改来确诊原因并且最终解决问题。通过一个实际案例介绍如何使用阶次分析原理和传递路径分析方法对车辆变速箱的齿轮啸叫噪声进行测量及诊断,根据文中的测试诊断结果,后续项目对25、挡齿轮进行了有针对性的设计修改,最终解决了困扰整车的变速箱齿轮啸叫噪声。通过文中介绍的测量方法及分析原理可以把单阶次的传动系啸叫噪声问题从错综复杂的动力总成噪声问题中分离出来,进行有针对性的研究改进。

关键词：齿轮啸叫噪声 NVH 阶次分析汽车

The clinicopathological and prognostic significance of PD-L1 expression in pancreatic cancer:A meta-analysis

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Hepatobiliary & Pancreatic Diseases International 2018年第2期17卷 95-100页

作者： He-Li Gaoa Liang Liua Zi-Hao Qi Hua-Xiang Xu Wen-Quan Wang Chun-Tao Wu Shi-Rong Zhang Jin-Zhi Xu Quan-Xing Ni Xian-Jun yua Department of Pancreatic Surgery Fudan University Shanghai Cancer CenterShanghai 200032China Department of Oncology Shanghai Medical CollegeFudan UniversityShanghai 200032China Shanghai Pancreatic Cancer Institute Shanghai 200032China Pancreatic Cancer Institute Fudan UniversityShanghai 200032China

Background: Immunotherapy has shown promise against solid tumors. However, the clinical significance of programmed cell death 1(PD-1) and programmed cell death ligand 1(PD-L1) in pancreatic ductal adenocarcinoma(PDAC) remains unclear. This meta-analysis aimed to analyze the prognostic effect of PD-L1 in *** sources: Electronic search of the Pub Med, Cochrane Library and Web of Science was performed until December 2016. Through database searches, we identified articles describing the relationship between PD-L1 status and PDAC patient prognosis. Meta-analysis was performed to investigate the relationship between PD-1 and overall survival(OS).Results: Nine studies with 989 PDAC patients were included for PD-L1 expression analysis. And 5 studies with 688 PDAC patients were included in the prognostic analysis. The PD-L1 positive rate measured by immunohistochemistry(IHC) was higher than that measured by polymerase chain reaction(PCR)(P < 0.001). PDAC patients with high expression levels of PD-L1 had significantly reduced OS(HR = 2.34;95% CI: 1.78–3.08). Subgroup analysis showed that the prognostic effect of PD-L1 levels was similar between the IHC and PCR methods. The PD-L1 positive rate was associated with PDAC T stages; the PD-L1 positive rate in the T3–4 group was higher than that in the T1-2 group(OR = 0.37; P = 0.001).Conclusions: High PD-L1 expression levels predicted a poor prognosis in PDAC patients. Thus, PD-L1 status helps determine treatment in PDAC patients.

关键词： Pancreatic ductal adenocarcinoma Programmed cell death ligand 1 Prognosis Meta-analysis