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Amino acid assisted aqueous synthesis of highly stable CsPbBr_(3)nanocrystals for cell imaging

Nano Research 2025年第1期18卷 675-683页

作者： Xue li Yanan Guo Guoying Tan Qingyi liu Nan song Yu Tang State Key laboratory of Applied Organic Chemistry Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu ProvinceCollege of Chemistry and Chemical EngineeringLanzhou UniversityLanzhou 730000China State Key laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization Baotou Research Institute of Rare EarthsBaotou 014030China

lead halide perovskite nanocrystals(NCs)exhibit excellent optoelectronic performance and have drawn great interests in the fields of biological imaging and ***,the poor stability of CsPbX_(3)(X=Cl,Br,I)in water is still a challenge to hinder their practical *** this work,a facile strategy has been developed for aqueous synthesis of CsPbX_(3) nanocrystals,in which l-glutamic acid(lGlu)has been used to replace oleic acid in the synthetic *** from the synergic effects of l-Glu and oleylamine(OAm),CsPbBr_(3)nanocrystals(l-Glu/OAm-CsPbBr_(3)NCs)with high water stability have been directly prepared under a mild condition at room temperature in water,facilitated by the process of crystal phase transformation from Cs_(4)PbBr_(6) to CsPbBr_(3).l-Glu/OAm-CsPbBr_(3)NCs exhibit a high quantum yield of 85%and a narrow full width at half maximum of 16 nm,demonstrating their efficient luminescence in ***,l-Glu on the surface have contributed greatly to an acidic environment and passivation of surface defects,improving the water stability and dispersibility of CsPbBr_(3)***,l-Glu/OAm-CsPbBr_(3)NCs exhibit great biocompatibility due to the presence of l-Glu,resulting in their good performance for Hela cell ***,we propose a facile and effective method to prepare CsPbBr_(3)nanocrystals with excellent water stability by using l-Glu and OAm as cooperated ligands and expand their application in cell imaging.

关键词： aqueous synthesis cell imaging lead halide perovskite nanocrystals l-glutamic acid phase transformation

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The effect of continuous Ni(Ⅱ) exposure on the organic degradation and soluble microbial product(SMP) formation in two-phase anaerobic reactor

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Journal of Environmental Sciences 2015年第7期27卷 78-87页

作者： Wei Wu Tengteng Duan Hail.ang song Yan li ang Yu long Zhang Aimin li State Key laboratory of Pollution Control and Resources Reuse School of the Environment Nanjing University Jiangsu Key lab of Environmental Engineering Jiangsu Provincial Academy of Environmental Science School of Energy and Environment Southeast University

A two-phase anaerobic reactor fed with glucose substrate（3 g chemical oxygen demand（COD）/l） was used to investigate the effects of toxic metals on the degradation of organics and the soluble microbial product（SMP） formation. low concentrations of Ni（II）（5 and10 mg/l） promoted the acid phase, whereas high concentrations（15, 20, and 25 mg/l）exhibited an inhibitory effect on, but did not alter the fermentative method, which mainly involved the fermentation of propionic acid. The methanogenic microorganism exhibited a strong capability adapting constantly increased Ni（II） levels. The acid phase was an accumulation stage of SMP. In the absence of Ni（II）, the high-molecular-weight material in the effluent SMP mainly contained polysaccharide, tryptophan, and casein. Methanogens metabolized most of the polysaccharide, the whole tryptophan content, and part of the casein, leading to the presence of humic acid and protein in effluent. After Ni（II） dosage, the protein and polysaccharide of the acid phase increased, and tryptophan changed, while casein remained stable. More protein than polysaccharide was produced, suggesting the prominent function of protein when addressing the negative effect of toxic metals. The analysis of DNA confirmed the change of bacterial activity.

关键词： Soluble microbial products (SMP) Two-phase anaerobic reactor Upflow anaerobic sludge bed (UASB) Ni(II)

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Symmetry-Protected Scattering in Non-Hermitian linear Systems

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Chinese Physics letters 2021年第2期38卷 29-35页

作者： l.Jin Z.song School of Physics Nankai UniversityTianjin 300071China

Symmetry plays fundamental role in physics and the nature of symmetry changes in non-Hermitian *** the symmetry-protected scattering in non-Hermitian linear systems is investigated by employing the discrete symmetries that classify the random *** even-parity symmetries impose strict constraints on the scattering coefficients:the time-reversal(C and K) symmetries protect the symmetric transmission or reflection;the pseudo-Hermiticity(Q symmetry) or the inversion(P) symmetry protects the symmetric transmission and *** the inversion-combined time-reversal symmetries,the symmetric features on the transmission and reflection *** odd-parity symmetries including the particle-hole symmetry,chiral symmetry,and sublattice symmetry cannot ensure the scattering to be *** guiding principles are valid for both Hermitian and non-Hermitian linear *** findings provide fundamental insights into symmetry and scattering ranging from condensed matter physics to quantum physics and optics.

关键词： symmetry symmetric parity

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A theoretical study on chemical ordering of 38-atom trimetallic Pd-Ag-Pt nanoalloys

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Chinese Physics B 2020年第7期29卷 548-554页

作者： songül Taran Ali Kemal Garip Haydar Arslan Department of Physics Duzce UniversityDuzce 81620Turkey Department of Physics Zonguldak Bulent Ecevit UniversityZonguldak 67100Turkey

In this study,truncated octahedron(TO)structure is selected for further analysis and we focus on 38-atom Pd-Pt-Ag trimetallic *** best chemical ordering structures of PdnAg32-nPt6 trimetallic nanoalloys are obtained at Gupta *** structures with the lowest energy at Gupta level are then re-optimized by density functional theory(DFT)relaxations and DFT results confirm the Gupta level calculations with small shifts on bond lengths indicating TO structure is favorable for 38-atom of PdnAg32-nPt6 trimetallic *** DFT excess energy analysis shows that Pd8Ag24Pt6 composition has the lowest excess energy value in common with excess energy analysis at Gupta *** Pd8Ag24Pt6 composition,eight Pd atoms are central sites of 8(111)hexagonal facets of TO,24 Ag atoms locate on surface,and 6 Pt atoms locate at the core of the *** is also obtained that all of the compositions except Pd18Ag14Pt6 and Pd20Ag12Pt6 exhibit a octahedral Pt ***,it is observed that there is a clear tendency for Ag atoms to segregate to the surface and also Pt atoms prefer to locate at core due to order parameter(R)variations.

关键词： nanoalloys chemical ordering optimization density functional theory(DFT)

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Altered expression of m^(1)A regulatory genes is associated with oncogenic pathways,overall survival,and infiltration of immune cells in diverse human cancers

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Genes & Diseases 2023年第3期10卷 739-742页

作者： Renhua song Justin J-l Wong Epigenetics and RNA Biology Program Centenary Institute The University of SydneyCamperdown 2050Australia Faculty of Medicine and Health The University of SydneyCamperdown 2050Australia

Of over 170 types of RNA modifications discovered,N^(6)-methyladenosine(m^(6)A)is the most actively studied.m6A confers oncogenic potential,maintains cancer stem cells,and is associated with cancer-related outcomes.^(... 详细信息

关键词： cancer maintain immune

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Fundamental Groups of Real Toric Spaces over Simple Polytopes

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Acta Mathematica Sinica,English Series 2022年第10期38卷 1887-1900页

作者： Zhi lU song ZHang School of Mathematical Sciences Fudan UniversityShanghai 200433P.R.China

In this paper we study the cubical stuctures and fundamental groups of real toric *** give an explicit presentation of the fundamental group of the real toric space over a simple *** using this presentation,we give a ... 详细信息

关键词： Real toric space fundamental group simple polytope real Buchstaber invariant

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PREPARATION AND CORROSION RESISTANCE OF NiP/TiO_2 COMPOSITE FIlM ON CARBON STEEl IN SUlFURIC ACID SOlUTION

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Acta Metallurgica Sinica(English letters) 2006年第2期19卷 117-123页

作者： l.Z. song S.Z. song J. Zhao School of Environment ＆ Chemical Engineering Yanshan University Qinhuangdao 066004 China School of Materials Science and Engineering Tianjin University Tianjin 300072 China

A NiP/TiO2 composite film on carbon steel was prepared by electroless plating and sol-gel composite process. An artificial neural network was applied to optimize the prepared condition of the composite film. Corrosion behavior of the NiP/TiO2 composite film was investigated by polarization resistance measurement, anode polarization, ESEM （environmental scanning electron microscopy） and EIS （electrochemical impedance spectroscopy） measurements. Results showed that the NiP/ TiO2 composite film has a good corrosion resistance in 0.5mol/l H2SO4 solution. The element valence of the composite film was characterized by XPS （X-ray photoelectron spectroscopy） spectrum, and an anticorrosion mechanism of the composite film was discussed.

关键词： electroless plating and sol-gel composite process artificial neural network NiP/TiO2 composite film corrosion resistance

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Disassociation of a one-dimensional cold molecule via quantum scattering

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Communications in Theoretical Physics 2023年第12期75卷 147-155页

作者： Wen-l.ang li Hai-Jing song Tie-ling song D l Zhou Institute of Physics Beijing National Laboratory for Condensed Matter PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China National Innovation Institute of Defense Technology AMSBeijing 100071China Department of Fundamental Science Space Engineering UniversityBeijing 101416China

Motivated by the recent experimental developments in ultracold molecules and atoms,we propose a simple theoretical model to address the disassociation,reflection,and transmission probability of a one-dimensional cold molecule via quantum ***,we show the Born approximation results in the weak interaction ***,by employing the lippmann-Schwinger equation,we give the numerical solution and investigate the disassociation’s dependence on the injection momentum and the interaction *** find that the maximum disassociation rate has a limit when increasing the interaction strengths and injection *** expect that our model can be realized in experiments in the near future.

关键词： cold molecule quantum scattering disassociation rate

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A novel flexible nerve guidance conduit promotes nerve regeneration while providing excellent mechanical properties

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Neural Regeneration Research 2025年第7期20卷 2084-2094页

作者： Tong li Quhan Cheng Jingai Zhang Boxin liu Yu Shi Haoxue Wang lijie Huang Su Zhang Ruixin Zhang song Wang Guangxu lu Peifu Tang Zhongyang liu Kai Wang Department of Orthopedics the Fourth Medical Center of Chinese PLA General HospitalBeijingChina Department of Training and Sports Medicine Characteristic Medical Center of Chinese People’s Armed Police ForceTianjinChina Medical School of Chinese PlA BeijingChina Key laboratory of Bioactive Materials for the Ministry of Education College of Life SciencesNankai UniversityTianjinChina Department of Orthopedics Tianjin HospitalTianjinChina Department of Rehabilitation Medicine Er Quan Hospital of PAPWuxiJiangsu ProvinceChina

Autografting is the gold standard for surgical repair of nerve defects>5 mm in length;however,autografting is associated with potential complications at the nerve donor *** an alternative,nerve guidance conduits may be *** ideal conduit should be flexible,resistant to kinks and lumen collapse,and provide physical cues to guide nerve *** designed a novel flexible conduit using electrospinning technology to create fibers on the innermost surface of the nerve guidance conduit and employed melt spinning to align ***,we prepared disordered electrospun fibers outside the aligned fibers and helical melt-spun fibers on the outer wall of the electrospun fiber *** presence of aligned fibers on the inner surface can promote the extension of nerve cells along the *** helical melt-spun fibers on the outer surface can enhance resistance to kinking and compression and provide *** novel conduit promoted nerve regeneration and functional recovery in a rat sciatic nerve defect model,suggesting that it has potential for clinical use in human nerve injuries.

关键词： aligned fibers anti-kinking helical fibers nerve guidance conduit nerve regeneration peripheral nerve injury topological guidance

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Experimental clearance rate and intraguild predation of jellyfish Cyanea nozakii

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Journal of Oceanology and limnology 2024年第1期42卷 128-140页

作者： Pengpeng Wang Fang ZHang song SUN Shuguo lÜ CAS Key laboratory of Marine Ecology and Environmental Sciences Institute of OceanologyChinese Academy of SciencesQingdao 266071China laboratory for Marine Ecology and Environmental Sciences Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China University of Chinese Academy of Sciences Beijing 100049China Jiaozhou Bay Marine Ecosystem Research Station Chinese Academy of SciencesQingdao 266071China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China Institute of Marine Ecology and Environment Hainan Academy of Environmental SciencesHaikou 570100China

Cyanea nozakii,a common jellyfish distributed in offshore China,has a complex trophic relationship with other zooplankton ***,few studies have reported the predation rates and prey selection patterns of *** medusae on different prey *** is also lacking on the intraguild predation of Aurelia coerulea(another common bloom jellyfish in offshore China)by *** address the knowledge gaps,the clearance rates of *** for different prey items,including copepods(smalllarge>1000μm),fish larvae,and gelatinous prey(hydromedusae,*** ephyrae,and chaetognaths),were *** influence of predator size on the clearance rate was also ***,we examined the intraguild predation of *** on *** *** clearance rates of *** varied widely with prey organisms,being independent of prey *** organisms,except for chaetognaths,were captured with considerably high efficiency,followed by fish larvae and copepods,indicating the preferential prey selection of gelatinous organisms by *** clearance rate increased linearly with the cross-sectional area of *** size in medusae may,to some extents,underpin their capacity to capture more prey by increasing the encounter rate and capture success through *** preyed voraciously on *** in high feeding efficiency,but the clearance rate decreased with increasing ***(as prey)*** phenomenon of intraguild predation suggests a speculative hypothesis of potential population regulation of *** by *** information regarding the feeding ecology of *** reported in this study is important for understanding plankton dynamics in marine ecosystems with extensive occurrences of this jellyfish.

关键词： Scyphomedusae predation rate gelatinous organisms prey selection feeding mechanism

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