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Product identification and toxicity change during oxidation of methotrexate by ferrate and permanganate in water

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Frontiers of Environmental Science & Engineering 2022年第7期16卷 125-137页

作者： Shengqi Zhang Chengsong Ye wenjun zhao Lili An Xin Yu Lei Zhang Hongjie Sun Mingbao Feng College of the Environment&Ecology Xiamen UniversityXiamen361102China College of Geography and Environmental Science Zhejiang Normal UniversityJinhua321004China State Key Laboratory of Cellular Stress Biology Innovation Center for Cell Signaling NetworkSchool of Life SciencesXiamen UniversityXiamen361102China Core Facility of Biomedical Xiamen UniversityXiamen361102China

Accompanying an annual increase in cancer incidence,the global use of anticancer drugs has remarkably increased with their worldwide environmental prevalence and ecological *** this study,the oxidation of methotrexate(MTX),a typical anticancer drug with ubiquitous occurrence and multi-endpoint toxicity,by ferrate(VI)(Fe(VI))and permanganate(Mn(VII)))was investigated in ***(VI)exhibited a higher reactivity with MTX(93.34 M^(−1) s^(−1))than Mn(VII)(3.01 M^(−1) s^(−1)) at pH *** introduction of Cu(II)and Fe(III)at 1.0 mM improved the removal efficiency of 5.0μM MTX by 100.0μM Fe(VI)from 80%to 95%and 100%after 4 min,*** oxidized products(OPs)were identified during oxidative treatments,while OP-191 and OP-205 were characterized as specific products for Fe(VI)*** ketonization of the L-glutamic acid moiety and cleavage of the peptide bond of MTX were ***,a multi-endpoint toxicity evaluation indicated no genotoxicity,neurotoxicity,or endocrine-disrupting effects of MTX and its ***,serious developmental toxicity in zebrafish larvae was observed in the treated MTX *** on the acute and chronic aquatic toxicity prediction,OP-190,OP-192,OP-206,and OP-208 were deemed toxic or very toxic compared to harmful ***,the reduced biodegradability index from 0.15(MTX)to−0.5 to−0.2(OP-192,OP-206,and OP-468)indicated the formation of lower biodegradable ***,this study suggests that Fe(VI)and Mn(VII)oxidation are promising treatments for remediating anticancer drug-contaminated ***,the environmental risks associated with these treatments should be considered in the evaluation of water safety.

关键词： Anticancer drugs High-valent metal-oxo species Oxidation kinetics Reaction mechanisms Multi-endpoint toxicity

Dominance-caused differences in transpiration of trees in a Karst broadleaved mixed forest

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Journal of Forestry Research 2020年第6期31卷 2083-2095页

作者： Yanhui Liu Fangjun Ding Deyuan Shu wenjun zhao Yingchun Chui Yiju Hou Peng Wu Guizhou Academy of Forestry Guiyang 550011GuizhouPeople’s Republic of China

Estimating stand transpiration of natural forests using traditional methods through up-scaling of sap fl ux density from sample trees based on stand sapwood area only is diffi cult because of the complexity of species,ages,and hierarchical structure of natural *** improve stand transpiration estimation,we developed an up-scaling method by considering the tree dominance eff ect based on the assumption that individual tree transpiration is aff ected by crown dominance and species,in addition to factors previously considered such as meteorological conditions,sapwood area,and soil *** this study,the meteorological factors,soil moisture,and sap fl ux density of 15 sample trees of diff erent species and dominance in a natural evergreen and deciduous broadleaved mixed forest were simultaneously monitored from March 2012 to February 2014 in the Karst mountain region in southwestern *** establishing a single tree transpiration model which considers the eff ects of dominance and species,an up-scaling method was explored to estimate stand *** results show that the transpiration intensity increased exponentially with increasing tree *** contribution to annual stand transpiration from a few dominant trees(5.4%of trees, 28.2% of basal area) was up to 65.0%. The correspondingcontribution was 16.2% from sub-dominant trees(7.6% of trees, 16.2% of basal area) and 22.8% from middleandlower-layer trees (87.0% of trees, 55.6% of basal area).The variation of individual tree transpiration was mainly(97.9%) explained by tree dominance, but very weakly bytree species. The estimated annual stand transpiration was300.2 mm when using the newly developed method whichconsiders tree dominance, 52.5 mm (14.9%) lower than theestimation (352.7 mm) of traditional method which considersonly the sapwood area eff ect, and 8.5 mm (2.7%) lowerthan the estimation (308.6 mm) which considers the eff ectsof both species composition and sapwood area. The maintree

关键词： Karst broadleaved mixed forest Forest canopy layer Tree dominance Sap fl ow Tree transpiration Forest water use

TRIP Steel Retained Austenite Transformation under Cyclic V-bending Deformation

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Journal of Wuhan University of Technology(Materials Science) 2014年第3期29卷 594-600页

作者：李洪洋 ZHANG Yanjing zhao wenjun GU Zhifei LI Xianchao MA Jinlong School of Material Science and Engineering Beijing Institute of Technology National Key Laboratory of Science and Technology on Materials under Shock and Impact Inner Mongolia First Machinery Group Co. Ltd

To investigate the transformation behavior of TRIP steel retained austenite under cyclic load, cyclic V-bending deformation of low carbon Si-Mn TRIP600 was studied by experiment and finite element in this paper. The results showed that, under cyclic V-bending deformation, retained austenite in TRIP steel transformed into martensite gradually with the increasing of bending times, and for the symmetrical characteristic, upper surface and lower surface presented the same transformation tendency. From the first to the fourth V-bending deformatiort, retained austenite volume fraction decreased nearly linearly and then attained saturation step by step. Compressive stress state was helpful for martensite transformation than tension stress state with V-bending deformation, and strain magnitude was the determining factor for retaining anstenite martensitic transformation. With the increasing of bending times effective stress increased and the relationship between maximum effective stress and bending times was nearly linear. Effective stress and effective strain distribution were non-uniform, the maximum effective stress and effective strain were present in the center of the samples. The relationships between retained austenite and V-bending times, and retained austenite with effective strain were set up as Eqs.（1）-（5）. The relationship was typical quadric function, decreased linearly for the initial deformation and attained saturation finally.

关键词： TRIP steel martensitic transformation retained austenite cyclic load

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Pedosphere 2003年第1期13卷 11-22页

作者： GONG ZITONG, ZHANG GANLIN, zhao wenjun, zhao YUGUO and CHEN ZHICHENGInstitute of Soil Science, the Chinese Academy of Sciences, Nanjing 210008 (China) InstituteofSoilScience theChineseAcademyofSciencesNanjing210008China

During the past half century, the land utilization of Hainan Island has undergone a rapid development,but in the meanwhile, soil degradation occurs. Analysis on some basic data of the soil series collected frommore than 100 soil profiles at the end of the 1990s and beginning of this century, in combination with dataavailable, showed that soils there suffered significant decline in organic matter, experienced P and K deficiencywith soil K going on losing and undergone acidification with continuing trend. The current situation calls forstrategies to build up Hainan into an important province of sound ecology by restoring forests, to improvefood quality by implementing K supplement projects, to combat soil acidification by ameliorating the soils andgrowing leguminous crops and to ensure health of the people by developing dairy production and increasingthe daily Ca uptake by the people.

关键词： hainan island land use soil changes

Shape-predicted model of spray forming rod under scanning atomization

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Rare Metals 2007年第S1期26卷 30-35页

作者： CAO Fuyang,WU Peilian,NING Zhiliang,zhao wenjun,and SUN Jianfei Key Laboratory for Procession Hot Processing of Metals,Harbin Institute of Technology,Harbin 150001,China Harbin Inst Technol Key Lab Proc Hot Proc Met Harbin 150001 Peoples R China

A model for simulating the spray forming process with scanning atomizer was *** for the scanning atomization and the deposition processes were coupled together in order to obtain a new description of the spray forming *** model,which is able to predict the shape of a spray-formed billet prepared with scanning atomizer,was established after analyzing the changes in droplet size and density distribution along the r-axis in the spray cone in scanning *** effects of the two kinds of atomization were compared,showing that the scanning atomization is good for deposition.

关键词： spray forming atomization modeling rapid solidification scanning atomization

Preliminary analysis of BDS-3 and Galileo compatible interoperable positioning performance

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Preliminary analysis of BDS-3 and Galileo compatible interop...

Classification of Ferrallitic Soils in Chinese Soil Taxonomy

第十一届中国卫星导航年会

作者： wenjun zhao Wei Wang Beijing Satellite Navigation Center Beijing UnistrongScience&TechnologyCo. Ltd.

In this paper, using the BDS-3 and Galileo observation data collected by compatible interoperable receivers, the signal-to-noiseratio(SNR), multipath, pseudorange and phase noise, single point positio

关键词： BDS-3 Galileo compatible interoperability positioning accuracy

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Pedosphere 2000年第2期10卷 125-133页

作者： GONG ZITONG CHEN ZHICHENG zhao wenjun and SHI HUA(Institute of Soil Science, the Chinese Academy of Sciences, P.O. Box 821, Naroing 210008 China) Institute of Soil Science the Chinese Academy of Sciences P.O. Box 821 Nanjing 210008 China

The development of the classification of ferrallitic soils in China is reviewed and the classification ofFerralisols and Ferrisols in Chinese Soil Taxonomy is introduced in order to discuss the correlation betweenthe ferrallitic soil classification in the Chinese Soil Taxonomy and those of the other soil classification *** the former soil classification systems of China, the ferrallitic soils were classified into the soil groups ofLatosols, Latosolic red soils, Red soils, Yellow soils and Dry red soils, according to the combination of soilforming conditions, soil-forming processes, soil features and soil properties. In the Chinese Soil Taxonomy,most of ferrallitic soils are classified into the soil orders of Ferralisols and Ferrisols based on the diagnostichorizons and/or diagnostic characteristics with quantitatively defined properties. Ferralisols are the soilsthat have ferralic horizon, and they are merely subdivided into one suborder and two soil groups. Ferrisolsare the soils that have LAC-ferric horizon but do not have ferralic horizon, and they are subdivided intothree suborders and eleven soil groups. Ferralisols may correspond to part of Latosols and Latosolic red *** may either correspond to part of Red soils, Yellow soils and Dry red soils, or correspond to part ofLatosols and Latosolic red soils.

关键词： Ferralisols Ferrisols Chinese Soil Taxonomy

Analysis on correction accuracy of ionospheric model for Beidou system

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Analysis on correction accuracy of ionospheric model for Bei...

Think ＂ Big＂ and become ＂ Big＂： On the architectureand space of an urban museum

第五届中国卫星导航学术年会

作者： wenjun zhao Qing Gao Daliang Gong P.O. Box 5128 Beijing 100094 China

ISBN: (纸本)9783642547362

With The ionospheric error is the main error sources affecting positioning accuracy for single‐frequency users *** of ionospheric model are broadcast by satellite navigation systems for users,so the correction accuracy of the model has a direct impact on positioning *** on continuous monitoring stations,Beidou system calculated and broadcast 8 parameters of Klobuchar under the geographic coordinate system,and they are updated every 2 *** order to scientifically evaluate the correction effect of Beidou ionospheric model,firstly,the ionospheric model accuracy of different time periods and different latitudes was analyzed through the basis of GIM model provided by CODE based on Beidou latest ***,the following positioning modes were calculated respectively.（1） Single frequency positioning without ionospheric corrections of Beidou.（2） Beidou Single‐frequency + Beidou K8 model.（3） Beidou Single‐frequency + GPS K8 *** effect of residual ionospheric corrections was analyzed for positioning *** results show that the northern hemisphere is better than the southern hemisphere for the accuracy of Beidou ionospheric ***‐latitudes regions can get the best correction,and the RMS of correction residuals was average about 0.6 meters,and it showed a decreasing trend to the low‐latitude and high‐latitude *** K8 model is better than GPS K8 model for single frequency positioning in Beijing.

关键词： Ionospheric model regional navigation system correction residuals correction rate

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科学教育与博物馆 2016年第3期2卷 223-229页

作者： zhao wenjun Shanghai Natural History Museum (巳ranch of Shanghai Science & Technology Museum)

Nowadays many urban museums are situated in ever-changing cities face with problems regardingspace and architecture. The main question this paper wants to discuss is how the museum could achieve accessibilityand inclusiveness to a greater extent via rethinking and reshaping its space, both physically and vir -tually,Based on practices conducted by the Museum of London since its establishment in the 20th century, Iendeavour to understand how the museum architecture was established during the negotiation and compro -mise among different individuals and parties and to extend the conception by exploring the possibilities of expanding out of the traditional realm of the museum architecture.

关键词： museum, architecture, space, extension