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Bilirubin adsorption property of mesoporous silica and amine-grafted mesoporous silica

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Nano-micro Letters 2009年第1期1卷 14-18页

作者： L.X.Zhang m.Zhu L.m.guo L.Li j.L.Shi State Key Laboratory of High Performance and Superfine microstructure Shanghai Institute of Ceramics Chinese Academy of Science

Nephritic, hepatic and immune failures would lead to the overload of endogenous toxic molecules(e.g. bilirubin, cholic acid, uric acid, creatinine etc.) in human bodies. It is fatal in most cases and extracorporeal blood purification(ECBP) is powerful first-aid therapy. Adsorbents are key parts of ECBP apparatus. mesoporous silicas should be promising candidates for these medical adsorbents, but there is no report about this. Herein, pure and amine-grafted mesoporous silicas have been applied to adsorb bilirubin, cholic acid, uric acid, creatinine and phenobarbital for the first time. These mesoporous materials show high adsorption capacities for bilirubin and uric acid in phosphate buffer solution(PBS). Effects of pore sizes, amine-modification, temperature and ionic strength on their bilirubin adsorption capacities have been studied in detail.

关键词： mesoporous silica Bilirubin adsorption Amine-grafted

A New Quantitative method for Studying the Vulnerability of Civil Aviation Network System to Spatially Localized Hazards

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International journal of Disaster Risk Science 2016年第3期7卷 245-256页

作者： Hang Li Xiao-Bing Hu Xiaomei guo Zhen Xu P.H.A.j.m.van Gelder Academy of Disaster Reduction and Emergency management Beijing Normal University State Key Laboratory of Earth Surface Processes and Resource Ecology Beijing Normal University Faculty of Technology Policy and Management Delft University of Technology School of Engineering University of Warwick

As an important infrastructure system, civil aviation network system can be severely affected by natural hazards. Although a natural hazard is usually local, its impact, through the network topology, can become *** by Wilkinson's work in 2012, this article proposes a new quantitative spatial vulnerability model for network systems, which emphasizes the spreading impact of spatially localized hazards on these systems. This model considers hazard location and area covered by a hazard,and spatially spreading impact of the hazard(including direct impact and indirect impact through network topology) and proposes an absolute spatial vulnerability index and a relative spatial vulnerability index to reflect the vulnerability of a network system to local hazards. The model is then applied to study the spatial vulnerability of the Chinese civil aviation network system. The simulation results show that(1) the proposed model is effective and useful to study spatial vulnerability of civil aviation network systems as the results well explain the general situation of the Chinese civil aviation system; and(2) the Chinese civil aviation network system is highly vulnerable to local hazards when indirect impacts through network connections are considered.

关键词： Civil aviation Network system Spatially localized hazards Vulnerability

EFFECTS OF Ce ON CORROSION RESISTANCE OF AZ91D mAGNESIUm ALLOY

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Acta metallurgica Sinica(English Letters) 2005年第2期18卷 129-136页

作者： Z.H.Huang X.F.guo Z.m.Zhang C.j.Xu SchoolofmaterialsScienceandEngineering Xi＇anUniversityofTechnologyXi＇an710048China

As-cast and corrosive microstructures of AZ91D alloy containing various Ce contents were observed by optical microscope (Om). The phase compositions of the alloys before and after the corrosion were analyzed by X-ray diffraction (XRD). meanwhile, the corrosion resistance of the alloys was tested by weight loss and potentiodynamic polarization curve methods respectively. The results show that rod-like Al4Ce phase is formed in AZ91D alloy containing certain Ce content and as-cast microstructures are refined. AZ91D-0.7%Ce alloy has good grain refinement effect. The addition of Ce can reduce the corrosion rate and corrosion current density of AZ91D alloy and those of AZ91D-0.1%Ce alloy reach the minimum, which are 0.35mg/(cm2·d) and 2.761μA/cm2 with 75% and 86% reduction, respectively. The increasing volume fraction and reticular degree of β phase can improve the corrosion resistance of the alloys.

关键词： AZ91D magnesium alloy Ce modification microstructure corrosion resistance

Recent Trends and Recommendations for Nitrogen Fertilization in Intensive Agriculture in Eastern China

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Pedosphere 2004年第4期14卷 449-460页

作者： m.ROELCKE HANYong K.H.SCHLEEF ZHUjian-guo LIUGang CAIZu-Cong j.RICHTER InstituteofGeoecology TechnicalUniversityCarolo-WilhelminaLangerKamp19c38106Braunschweig（Germany） InstituteofSoilScience ChineseAcademyofSciencesP.O.Box821Nanjing210008（China） InstituteofFarmEconomics FederalAgriculturalResearchCentre（FAL）BundesaUee5038116Braunschweig（Ger-many）

The Taihu Region in eastern China is one of China's most intensive agricultural regions and also one of the economically most developed areas. High nitrogen balance surpluses in the summer rice-winter wheat double-cropping systems are leading to large-scale non-point source pollution of aquifers. In an interdisciplinary approach, four-year (1995-1998) field trials were carried out in two representative areas (jurong County and Wuxi City) of the Taihu Region. Five farmers' field sites were chosen in each of the 2 locations, with each site divided into 'standard' (farmers' practice) and 'reduced' (by 30%-40%) N fertilization. For both fertilization intensities, N balance surpluses and monetary returns from grain sales minus fertilizer expenditures were calculated in an economic assessment. Based on the field trials, the mineral N fertilizer application rates reduced by about 10% for rice and 20%-30% for wheat were recommended in 1999. Since 1999, the research focused on the trends in N fertilizer application rates and changes in grain and agricultural commodities *** rice N fertilizer use, in Wuxi City as of 2001, dropped by roughly 25%, while for winter wheat it decreased by 10%-20%, compared to the 1995-1998 period. This has been achieved not only by grain policy and price changes, but also by an increased environmental awareness from government officials. Nitrogen balance surpluses in Anzhen Town (of Wuxi City) have consequently diminished by 50%-75% in rice and by up to 40% in wheat, with reductions being achieved without concomitant decreases in physical grain yields or returns from sales minus fertilizer costs.

关键词： agro-economy N fertilization non-point source pollution rice-wheatrotation Taihu Region

Experimental and Data Fitting Guidelines for the Determination of Polymer Crystallization Kinetics

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Chinese journal of Polymer Science 2022年第6期40卷 658-691页

作者： Ricardo Arpad Perez-Camargo guo-ming Liu Du-jin Wang Alejandro j.muller Beijing National Laboratory for molecular Sciences CAS Key Laboratory of Engineering PlasticsInstitute of ChemistryChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China POLYmAT and Department of Polymers and Advanced materials:Physics Chemistry and TechnologyFaculty of ChemistryUniversity of the Basque Country UPV/EHUDonostia-San Sebastián 20018Spain IKERBASQUE Basque Foundation for ScienceBilbao 48013Spain

The crystallization kinetics of semicrystalline polymers is often studied with isothermal experiments and analyzed by fitting the data with analytical expressions of the Avrami and Lauritzen and Hoffman(LH)*** correctly carry out the analysis,precautions in both experiments and data fitting should be ***,we systematically discussed the factors that influence the validity of the crystallization kinetics *** basic concepts and fundamentals of the Avrami and LH theories were introduced at ***,experimental protocols were discussed in *** clarify the impact of various experimental parameters,selected common polymers,i.e.,polypropylene and polylactide,were studied using various experimental techniques(i.e.,differential scanning calorimetry and polarized light optical microscopy).Common mistakes were simulated under conditions when non-ideal experimental parameters were ***,from a practical point of view,we show how to fit the experimental data to the Avrami and the LH theories,using an Origin■App developed by us.

关键词： Isothermal crystallization Avrami equation Lauritzen and Hoffman theory Thermal analysis Step-crystallization

Sequence-activated chemiluminescence probes: programmable illumination for high-contrast in vivo sensing and imaging

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Science China Chemistry 2025年第1期 26-34页

作者： Yutao Zhang juan Li Wei-Hong Zhu Zhiqian guo Shanghai Key Laboratory of Functional materials Chemistry Joint International Research Laboratory of Precision Chemistry and Molecular Engineering Institute of Fine Chemicals School of Chemistry and Molecular Engineering East China University of Science and Technology State Key Laboratory of Bioreactor Engineering Shanghai Frontier Science Research Base of Optogenetic Techniques for Cell MetabolismEast China University of Science & Technology

Sequence-activated chemiluminescence(CL) technique offers a unique approach to detecting specific biomolecules or cellular events with high sensitivity and spatial resolution. The fundamental principle behind sequence-activated CL probes involves tailoring highly-controllable CL signals in response to specific sequences or events of interest, thus enabling high-contrast signals under complex physiological conditions. This sequential activation could be triggered by enzymes, reactive oxygen species(ROS), biothiols or changes in the microenvironment. These unique sequence-activated CL probes bestow several advantages, including minimal background, deep-tissue penetration, and the ability of non-invasive or minimally invasive detection. The sequence-activated CL techniques represent a significant advancement in molecular imaging and diagnostics. In this mini-review, we focus on the latest developments in sequential CL probes, addressing the technical challenges and discussing the future trajectory by harnessing CL signaling and molecular recognition.

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RECIPROCATING EXTRUSION OF IN SITU mg_2Si REINFORCED mg-Al BASED COmPOSITE

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Acta metallurgica Sinica(English Letters) 2008年第3期21卷 169-177页

作者： Z.m. Zhang C.j. Xu X.F. guo S.Z. jia School of materials Science ＆ Engineering Xi＇an University of Technology Xi＇an 710048 China

m92Si reinforced mg-Al based composite with high amount o/silicon was prepared by permanent mould casting, and then extruded by reciprocating extrusion （RE） after the composite was processed by homogenization heat treatment. The effect of RE processing on the morphology and size of m92Si and the mechanical properties of the com- posite were investigated, to develop new ways to refine the m928i phase and improve its shape. The result showed that RE was very useful in refining the m92Si phase. The more the RE processing passes, the better the refining effect would be. moreover, the uniform distribution of m928i phases would be more in the composite. After the composite was processed by RE for 12 passes, most m92Si phases were equiaxed, with granular diameter below 20 μm, and distributed uniformly in the matrix of the composite. The mechanical properties of the composite could be increased prominently by RE processing, and were much higher than that in the as-cast state. As the temperature rises, the tensile strength is reduced. For the composite RE processed for 12 passes, the tensile strength, yield strength, and elongation are 325.9 mPa, 211.4 mPa, and 3.3% at room temperature, whereas, 288.2 mPa, ,207.7 mPa, and 7.8%, respectively, at 150℃. In comparison with the properties at room temperature, the tensile strength and yield strength are high and only decrease by 11.6% and 1.8% at 150℃. The m928i reinforced mg-Al based composite possesses good heat resistance at 150℃. The excellent resistance to effect of heat is attributed to the high melting tempera- ture and good thermal stability of fine mg2Si phases, which are distributed uniformly in the composite, and effectively hinder the grain boundary gliding and dislocation movement.

关键词： Reciprocating extrusion magnesium alloy In situ composite Elevated temperature property

Shannon information entropies for rectangular multiple quantum well systems with constant total lengths

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Chinese Physics B 2018年第4期27卷 154-163页

作者： m Solaimani guo-Hua Sun Shi-Hai Dong Department of Physics Faculty of Science Qom University of Technology Qom Iran Catedrática CONACyT CIC lnstituto Politécnico Nacional Unidad Profesional ALM CDMX C. P. 07700 Mexico Laboratorio de Informacién Cuántica CIDETEC Instituto Politécnico Nacional Unidad Profesional ALM CDMX C. P. 07700 Mexico

We first study the Shannon information entropies of constant total length multiple quantum well systems and then explore the effects of the number of wells and confining potential depth on position and momentum information entropy density as well as the corresponding Shannon *** find that for small full width at half maximum（FWHm） of the position entropy density,the FWHm of the momentum entropy density is large and vice *** increasing the confined potential depth,the FWHm of the position entropy density decreases while the FWHm of the momentum entropy density *** increasing the potential depth,the frequency of the position entropy density oscillation within the quantum barrier decreases while that of the position entropy density oscillation within the quantum well *** increasing the number of wells,the frequency of the position entropy density oscillation decreases inside the barriers while it increases inside the quantum *** an example,we might localize the ground state as well as the position entropy densities of the1 st,2 nd,and 6 th excited states for a four-well quantum ***,we verify the Bialynicki–Birula–mycieslki（BBm）inequality.

关键词： position and momentum Shannon entropies multiple quantum well entropy densities

maintaining moderate levels of hypochlorous acid promotes neural stem cell proliferation and differentiation in the recovery phase of stroke

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Neural Regeneration Research 2025年第3期20卷 845-857页

作者： Lin-Yan Huang Yi-De Zhang jie Chen Hai-Di Fan Wan Wang Bin Wang ju-Yun ma Peng-Peng Li Hai-Wei Pu Xin-Yian guo jian-Gang Shen Su-Hua Qi School of medical Technology Xuzhou Key Laboratory of Laboratory DiagnosticsXuzhou Medical UniversityXuzhouJiangsu ProvinceChina School of Pharmacy Xuzhou Medical UniversityXuzhouJiangsu ProvinceChina Department of Laboratory medicine Branch Hospital of Huai’an First People’s HospitalHuai’anJiangsu ProvinceChina Department of Laboratory medicine the Affiliated Hospital of Xuzhou Medical UniversityXuzhouJiangsu ProvinceChina School of Chinese medicine The University of Hong KongHong Kong Special Administrative RegionChina

It has been shown clinically that continuous removal of ischemia/reperfusion-induced reactive oxygen species is not conducive to the recovery of late ***,previous studies have shown that excessive increases in hypochlorous acid after stroke can cause severe damage to brain *** previous studies have found that a small amount of hypochlorous acid still exists in the later stage of stroke,but its specific role and mechanism are currently *** simulate stroke in vivo,a middle cerebral artery occlusion rat model was established,with an oxygen-glucose deprivation/reoxygenation model established in vitro to mimic *** found that in the early stage(within 24 hours)of ischemic stroke,neutrophils produced a large amount of hypochlorous acid,while in the recovery phase(10 days after stroke),microglia were activated and produced a small amount of hypochlorous ***,in acute stroke in rats,hypochlorous acid production was prevented using a hypochlorous acid scavenger,taurine,or myeloperoxidase inhibitor,4-aminobenzoic acid *** results showed that high levels of hypochlorous acid(200μm)induced neuronal apoptosis after oxygen/glucose deprivation/***,in the recovery phase of the middle cerebral artery occlusion model,a moderate level of hypochlorous acid promoted the proliferation and differentiation of neural stem cells into neurons and *** suggests that hypochlorous acid plays different roles at different phases of cerebral ischemia/reperfusion *** levels of hypochlorous acid(5 and 100μm)promoted nuclear translocation ofβ-*** transfection of single-site mutation plasmids,we found that hypochlorous acid induced chlorination of theβ-catenin tyrosine 30 residue,which promoted nuclear ***,our study indicates that maintaining low levels of hypochlorous acid plays a key role in the recovery of neurological function.

关键词： cell differentiation cerebral ischemia/reperfusion injury chlorination hypochlorous acid microglia neural stem cell neurogenesis nuclear translocation stroke β-catenin