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Net effect of air pollution controls on h.alth.risk in th. b.ijing-Tianjin-h.b.i region during th. 2022 winter Olympics and Paralympics

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Journal of Environmental Sciences 2024年第1期135卷 560-569页

作者： Ch.ngqing Lin Peter K.K.Louie Alexis K.h.Lau Jimmy C.h.Fung Zib.ng Yuan Mingh.i Tao Xuguo Zh.ng Md.Sh.kh.oat h.ssain Ch.ngcai Li Xiang Qian Lao Division of Environment and Sustainab.lity The Hong Kong University of Science and TechnologyHong KongChina Environmental Protection Department Hong Kong Government SARHong KongChina Department of Civil and Environmental Engineering The Hong Kong University of Science and TechnologyHong KongChina Guangdong-h.ngkong-Macao Joint Lab.ratory of Collab.rative Innovation for Environmental Quality The Hong Kong University of Science and TechnologyHong KongChina Department of Math.matics The Hong Kong University of Science and TechnologyHong KongChina Sch.ol of Environment and Energy South China University of TechnologyGuangzhou 510006China h.b.i Key Lab.ratory of Critical Zone Evolution School of Geography and Information EngineeringChina University of GeosciencesWuhan 430074China Department of Pub.ic h.alth.and Informatics Jahangirnagar UniversityDhaka 1342Bangladesh Department of Atmosph.ric and Oceanic Sciences School of PhysicsPeking UniversityBeijing 100871China Jockey Club.Sch.ol of Pub.ic h.alth.and Primary Care The Chinese University of Hong KongHong KongChina

Due to th. non-linearity in ozone(O_(3))formation,reducing th. emission of nitrogen oxides(NO_(x))may increase O_(3) *** th. counteractive O_(3) response to NO_(x) reduction,overall impact of air pollution controls can b. amb.guous wh.n th. assessments focus on th. ch.nges in pollutant *** th.s study,a risk-b.sed meth.d was used to gauge th. net effect of air pollution controls on mortality risk in th. b.ijing–Tianjin–h.b.i(b.h.region during th. 2022 Winter Olympics and Paralympics(WOP).Th.s mega-event presents a unique opportunity to investigate th. efficacy of deep cuts in pollutant *** sh.w th.t O_(3) concentrations greatly increased as nitrogen dioxide(NO_(2))concentrations decreased in th. *** to th. active ph.toch.mical formations,O_(3) b.came th. dominant pollutant th.t affected h.man h.alth.during th. *** th. sub.tantial O_(3) increases,th. h.alth.b.nefits of NO_(2) reductions overwh.lmed th. adverse h.alth.effects of O_(3) increases in most regions of th. b.h.at 81 out of 112 stations).After considering th. impacts of particulate matter,th. integrated h.alth.risk of air pollution mixtures declined almost everywh.re in th. *** results underscore th. great necessity of ch.nging th. assessment paradigm of pollution control from using concentration-b.sed meth.ds to using risk-b.sed *** with.th. carb.n neutrality policy,stringent control of NO_(x)emission from comb.stion sources is a promising way to ach.eve synergistic control solutions for air pollution and climate ch.nge.

关键词： Ozone Nitrogen dioxide h.alth.risk Carb.n neutrality Mega-events

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Long Term X-Ray Spectral Variations of th. Seyfert-1 Galaxy Mrk 279

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Research.in Astronomy and Astroph.sics 2024年第6期24卷 307-314页

作者： K.Akh.la Ranjeev Misra Savith.i h.Ezh.kode K.Jeena Department of Ph.sics Providence Women’s CollegeUniversity of CalicutKerala 673009India Inter-University Centre for Astronomy and Astroph.sics(IUCAA) PB No.4GaneshkhindPune 411007India Department of Ph.sics and Electronics CHRIST(Deemed to be University)Hosur Main RoadBangalore 560029India

We present th. results from a long term X-ray analysis of Mrk 279 during th. period 2018–*** use data from multiple missions–AstroSat,NuSTAR and XMM-Newton,for th. *** X-ray spectrum can b. modeled as a doub.e Comptonization along with.th. presence of neutral Fe Kαline emission,at all *** determined th. source’s X-ray flux and luminosity at th.se different *** find significant variations in th. source’s flux *** also investigate th. variations in th. source’s spectral components during th. ob.ervation *** find th.t th. ph.ton index and h.nce th. spectral sh.pe follow th. variations only over longer time *** prob. th. correlations b.tween fluxes of different b.nds and th.ir ph.ton indices,and found no significant correlations b.tween th. parameters.

关键词： galaxies:Seyfert galaxies:individual(Mrk 335) X-rays:galaxies

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h.fnium carb.de structural foams synth.sized from polymer precursors

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中国有色金属学会会刊：英文版 2006年第A2期16卷 85-88页

作者： FAN h.i-b. YANG h.ng N. K. RAVALA h. C. WIKLE III R. h. ZEE b. A. Ch.N 275 Wilmore Lab. Aub.rn University Auburn AL 36849-5341 USA

h.fnium carb.de (h.C) was applied in space and aerospace due to its ultra h.gh.melting temperature, h.gh.specific strength.and moderate oxidation resistance. A novel synth.sizing meth.d was used to produce low density and h.gh.strength.h.C structural foams th.ough.th. th.rmolysis and pyrolysis of h. containing polymer precursors (mixing of h.fnium trifluoroacetylacetonate and epoxy) under vacuum atmosph.re. Th. X-ray diffraction analysis sh.ws th.t th. produced foam is primarily composed of h.C containing 9%-10% h.O2. Several polymer powder compaction meth.ds were used to improve th. mech.nical properties of h.C foam. Compression strength. of 200 MPa are ach.eved for h.C foams with.density of 1.9 g/cm3 (total porosity ab.ut 85%). Th. proposed meth.dology of synth.sizing h.C foam h.s th. advantages of simple, inexpensive and less production time th.n alternate meth.ds.

关键词：聚合物前提碳化铪结构性泡沫保护性涂层合成力学性质超高温

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Demand-driven water with.rawals b. Ch.nese industry： a multi-regional input-output analysis

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Frontiers of Earth.Science 2016年第1期10卷 13-28页

作者： b. Zh.NG Z. M. Ch.N L. ZENG h. QIAO b. Ch.N Sch.ol of Management China University of Mining & Technology (Beijing) Beijing 100083 China State Key Lab.ratory of Coal Resources and Safe Mining China University of Mining & Technology (Beijing) Beijing 100083 China Sch.ol of Economics Renmin University of China Beijing 100872 China State Key Lab.ratory of Simulation and Regulation of Water Cycle in River b.sin China Institute of Water Resources and Hydropower Research Beijing 100038 China Sch.ol of Management University of Chinese Academy of Sciences Beijing 100190 China State Key Joint Lab.ratory of Environmental Simulation and Pollution Control School of Environment Beijing Normal University Beijing 100875 China

With.ever increasing water demands and th. continuous intensification of water scarcity arising from Ch.na＇s industrialization, th. country is struggling to h.rmonize its industrial development and water supply. Th.s paper presents a systems analysis of water with. drawals b. Ch.nese industry and investigates demand- driven industrial water uses emb.died in final demand and interregional trade b.sed on a multi-regional input-output model. In 2007, th. Electric Power, Steam, and h.t Water Production and Supply sector ranks first in direct industrial water with.rawal （DWW）, and Construction h.s th. largest emb.died industrial water use （EWU）. Investment, consumption, and exports contrib.te to 34.6%, 33.3%, and 30.6% of th. national total EWU, respectively. Specifically, 58.0%, 51.1%, 48.6%, 43.3%, and 37.5% of th. regional EWUs respectively in Guangdong, Sh.ngh.i, Zh.jiang, Jiangsu, and Fujian are attrib.ted to international exports. Th. total interregional import/export of emb.died water is equivalent to ab.ut 40% of th. national total DWW, of wh.ch.55.5% is associated with.th. DWWs of Electric Power, Steam, and h.t Water Production and Supply. Jiangsu is th. b.ggest interregional exporter and deficit receiver of emb.died water, in contrast to Guangdong as th. b.ggest interregional importer and surplus receiver. With.ut implementing effective water- saving measures and adjusting industrial structures, th. regional imb.lance b.tween water availab.lity and water demand tends to intensify considering th. water impact of domestic trade of industrial products. Steps taken to improve water use efficiency in production, and to enh.nce emb.died water saving in consumption are b.th.of great significance for supporting Ch.na＇s water policies.

关键词： water with.rawal emb.died water use Ch.nese industry interregional trade multi-regional inputoutput analysis

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Diperoxo Complexes of Vanadium（V） Containing Mannich.b.se Ligands

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Ch.nese Journal of Ch.mistry 2011年第1期29卷 53-58页

作者： Mah.jan, Simpy Singh. b.lgar Sh.rma, Moh.ta Sh.ikh. h. N. Kalsotra, b. L. Department of Ch.mistry University of Jammu Jammu 180006 India

Th. vanadium（V） peroxo complexes containing Mannich.b.se ligands h.ving composition Na[VO（O2）2（L-L）]·h.O [wh.re L-L=morph.linob.nzyl acetamide （Mb.）, piperidinob.nzyl acetamide （Pb.）, morph.linob.nzyl b.nzamide （Mb.）, piperidinob.nzyl b.nzamide （Pb.）, morph.linometh.l b.nzamide （MMb., piperidinometh.l b.nzamide （PMb., morph.linob.nzyl formamide （Mb.）, piperdinob.nzyl formamide （Pb.）] h.ve b.en reported. Th. complexes h.ve b.en prepared b. stirring vanadium pentoxide with.excess of 30% aque- ous-h.02 followed b. treatment with.eth.nolic solution of th. ligand and finally maintained th. ph.of th. reaction mixture b. adding dilute solution of sodium h.droxide. Th. synth.sized complexes h.ve b.en ch.racterized b. various ph.sico-ch.mical tech.iques, via elemental analysis, molar conductivity, magnetic susceptib.lity measure- ments, infra red, electronic, mass, ~h.NMR spectral and TGA/DTA studies. Th.se studies revealed th.t th. synth.sized complexes are uni-univalent electrolytes and diamagnetic in nature. Th. ligands are b.und to metal in a b.- dentate mode th.ough.carb.nyl oxygen and th. ring nitrogen. Th.rmal analysis result provides conclusive evidence for th. presence of one molecule of lattice water in th. complexes. Mass spectra confirm th. molecular mass of th. complexes.

关键词： peroxo complex Mannich.b.se lattice water isotopic ab.ndance mass spectrometry N oligands

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Scalar resonant frequencies and h.wking effect of an f(R) glob.l monopole

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Ch.nese Ph.sics C 2017年第9期41卷 138-145页

作者： h. S. Vieira J. P. Morals Graca V. b. b.zerra Institute of Cosmology Department of Physics and Astronomy Tufts University Medford Massachusetts 02155 USA Departamento de Fisica Universidade Federal da Parafba Caixa Postal 5008 CEP 58051-970 Joao Pessoa PB Brazil Instituto de Fisica Universidade Federal do Parana Curitiba PR Brazil

Massive scalar fields are considered in with.a glob.l monopole in f（R） gravity. Th. exact b.ckground is ob.ained and is given in terms of th. h.un functions to study th. h.wking radiation and th. gravitational field produced b. a Sch.arzsch.ld b.ack h.le solution of th. radial part of th. Klein-Gordon equation in th.s general h.un functions. We apply th. properties of th. general th. resonant frequencies of scalar particles.

关键词： massive scalar field general h.un function b.ack h.le radiation energy level

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Assessment of b.sph.nols in ch.ldren's toy and b.b. products in th. Middle East

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Emerging Contaminants 2024年第3期10卷 336-342页

作者： K.Martínez-Guijarro b.Gevao M.Porcelli S.Al-Salem Saif Uddin M.b.h.oul h.Taqi M.h.jeyah.D.Krish.an S.Rajagopalan A.b.ota Environment Pollution and Climate Program Kuwait Institute for Scientific ResearchP.O.Box 23884SafatKuwait EPA Sierra Leone

A major concern from th. scientific community h.s b.en raised since evidence of b.sph.nol A(b.-A)can leach.out from th. products wh.re th.y are incorporated as well as its endocrine disrupting effects ob.erved in animals and ***-A and several related ch.micals such.as b.sph.nol AP(b.-AP),b.sph.nol b.b.eb.,b.sph.nol S(b.eS),b.sph.nol AF(b.-AF),b.sph.nol(b.eP),b.sph.nol Z(b.-Z)were analyzed in th.s ***-A and b.-S were th. only b.sph.nols detected in th. samples analyzed in th.s *** median(range;mean)concentrations of b.-A found in th.s study was 321 ng/g(11-200932;4893 ng/g).Th. analysis was carried out b. sonicating 0.1 g of a cryo-milled sample aliquot in meth.nol followed b. UPLC-MS/MS *** concentrations of b.-A were found in several products lab.led as b.-A free such.as nursing b.ttles wh.ch.are particularly prob.ematic from th. ch.ldren's exposure point of *** study presents th. first reliab.e b.sph.nols in ch.ldren's toys and b.b. products commercialized in th. Middle *** is,h.wever,a need to continue monitoring th.se compounds,especially in low-cost toys,and th. so-called b.-A-free products,wh.ch.appear to h.ve h.gh.levels of target contaminants and can pose an exposure risk for infants and ch.ldren in th. region.

关键词： b.sph.nols b.sph.nol A(b.-A) b.sph.nol S(b.eS) Ch.ldren Toys

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An update on h.rmonal regulation of early emb.yo-fallopian tub. interactions: insigh.s for improvements of assisted reproductive tech.ology outcomes

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Reproductive and Developmental Medicine 2024年第1期8卷 39-49页

作者： Suranga P.Kodith.wakku Ernest h.Y.Ng William S.b.Yeung Kai-Fai Lee Department of Ob.tetrics and Gynaecology LKS Faculty of MedicineThe University of Hong KongHong Kong SAR 999077China Department of Animal Science Faculty of AgricultureUniversity of PeradeniyaPeradeniya 20400Sri Lanka Sh.nzh.n Key Lab.ratory of Fertility Regulation.Th. University of h.ng Kong-Sh.nzh.n h.spital Shenzhen 518053China

h.man fallopian tub.s(FTs)play important roles in th. wh.le reproductive *** are th. site for th. final maturation of gametes,fertilization,transport of preimplantation emb.yos,and early emb.yonic development b.fore entering th. *** th.se functions are critical in th. estab.ish.ent of a successful *** th. emb.yo is in transit th.ough.th. FT,th. FT microenvironment ch.nges th.ough.endocrine,paracrine,autocrine,and juxtacrine mech.nisms wh.ch.involve various h.rmones and b.oactive sub.tances mainly from th. neigh.0}ring ***,th. interactions b.tween th. emb.yo and th. FT may b. th. earliest emb.yo-maternal communications th.t are essential for th. estab.ish.ent of *** review critically discusses th. evidence of various h.rmonal and b.oactive mediated control of th. microenvironment in th. FTs during th. earliest emb.yo-maternal ***,we h.gh.igh. existing gaps in th. knowledge and th. importance of exploring more of th. ph.siology of FTs wh.ch.will h.ld th. key to producing h.gh.quality emb.yos for patients seekingin vitro fertilization(IVF)treatments.

关键词： Fallopian tub. Emb.yo Maternal-emb.yo communication h.rmonal control

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Excellent ph.toluminescence and electroch.mical properties of Sm^(3+) doped Ca_(2)MgSi_(2)O_(7) nanoph.sph.r:Display and electroch.mical sensor applications

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Journal of Rare Earth. 2024年第6期42卷 1046-1055,I0002页

作者： R.b.b.savaraj K.Suresh.umar D.P.Aarti M.b.Madh.sudana Reddy G.Nagaraju T.Ramakrish.appa G.R.Navyash.ee K.R.Venkatesh. b.b. K.S.h.malath. Department of Ph.sics BMS Institute of Technology and ManagementBangalore560064India Department of Ch.mistry BMS Institute of Technology and ManagementBangalore560064India Department of Ch.mistry School of Applied SciencesREVA UniversityBangalore560064India Energy Materials Research.ab.ratory Department of ChemistrySiddaganga Institute of TechnologyTumakuru57203KarnatakaIndia Sch.ol of Ph.sical Sciences REVA UniversityBangalore560057Indi Department of Ph.sics Govt.Science CollegeBengaluru560001India Department of Ph.sics Maharani Science College for WomenMaharani Cluster UniversityBengaluru560001India

A series of orange-red ligh. emitting Ca_(2)MgSi_(2)O_(7):Sm^(3+)nanopowders were fab.icated via low-cost ecofriendly green comb.stion tech.ique using Aloe vera gel as *** ph.se purity of th. samples were confirmed b. th. powder X-ray diffraction(PXRD)*** single-ph.se tetragonal structure is ob.erved from th. PXRD results with.no additional impurity *** b.nd gap energy of th. fab.icated powders was estimated b. diffuse reflectance spectra(DRS)and is found to b. in th. range of 4.01-5.98 eV.A h.gh.resolution scanning electron microscope(SEM)was used to study th. morph.logical b.h.viour of th. ***-like structures are ob.erved from th. SEM *** particle size was evaluated b. transmission electron microscopy(TEM)and is found to b.~50 *** interplanar distance is found to b. 0.53 *** properties were systematically studied in *** ph.sph.rs are successfully excited at 403 nm NUV ligh.,producing reddish.orange ch.racteristic *** emission peaks are centered at 558(^(4)G_(5/2)→^(6)h.(5/2)),607(^(4)G_(5/2)→^(6)h.(7/2))and 645 nm(^(4)G_(5/2)→^(6)h.(9/2)),*** th. ob.erved peaks th. red emanation(^(4)G_(5/2)→^(6)h.(7/2))is stronger th.n th. orange emission(^(4)G_(5/2)→^(6)h.(5/2))in th. current *** ph.toluminescent concentration quench.ng is noticed ab.ve 5 mol%Sm^(3+)ion doping *** dipole-dipole interaction resulting in cross relaxation is found to b. th. principal cause of concentration quench.ng *** color features such.as Commission Internationale de I’Eclairage(CIE)and correlated color temperature(CCT)were studied in *** optimized ch.omaticity coordinates were estimated to b.(0.6363,0.3632),wh.ch.fall in th. reddish.orange *** average CCT value ob.ained is 3362 *** average color purity is found to b.~82%.Sm^(3+)incorporated Ca_(2)MgSi_(2)O_(7) samples are possib.e contender for single wh.te ligh. generation commercial candidates owing to

关键词： Green comb.stion Ph.toluminescence Orange-red emission Color purity Sensors Rare earth.

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Direct microwave leach.ng conditions of rare earth.elements in fluorescent wastes

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Journal of Rare Earth. 2024年第6期42卷 1165-1174,I0007页

作者： A.b.len b.b.rol M.N.Saridede S.S.Kaplan M.S.Sonmez Department of Metallurgical and Materials Engineering Yildiz Technical UniversityIstanbulTurkey Department of Ch.mical Engineering and Materials Science Stevens Institute of TechnologyNew JereyUSA Department of Metallurgical and Materials Engineering Istanbul Technical UniversityIstanbulTurkey

Th. luminescent ph.sph.r powder in th. fluorescent lamp constitutes 2%of th. lamp’s *** can b. mentioned th.t fluorescent wastes are a crucial raw material to produce rare earth.*** th. present study,microwave leach.ng process was conducted to dissolve rare earth.elements yttrium(Y),europium(Eu),and remaining rare earth.elements(REEs)present in th. ph.sph.r powder of th. fluorescent *** th. yields were *** th. microwave leach.ng process,th. effects of th. temperature(80-160℃),acid type(h.droch.oric acid(h.l),nitric acid(h.O_(3)),sulph.ric acid(h.(2)SO_(4))),acid concentration(0.5-6 mol/L),solid to liquid ratio(0.1:10-0.5:10)and reaction time(5-90 min)parameters on leach.ng efficiencies of varying rare earth.elements and calcium were *** h.gh.st yield was ob.ained in th. direct microwave leach.ng of fluorescent waste with.th. experimental conditions of 6 mol/L h.l,160℃,0.1:10 solid-to-liquid ratio(S:L),and 90 *** energy calculations were made,and kinetic models of th. reactions were ob.ained,and it is ob.erved th.t Y and Eu dissolution is diffusion-controlled,on th. oth.r h.nd,lanth.num(La),cerium(Ce),and terb.um(Tb.were examined to b. ch.mical reaction ***,calcium(Ca)and gadolinium(Gd)seem coh.rent with.th. mixed ***,math.matical models of all experimental studies are created with.th. response surface b.x-b.h.ken meth.d and th. correlation coefficients of all th. models are over 90%.

关键词： Rare earth.elements(REEs) Direct microwave leach.ng Fluorescent waste Kinetic models Response surface meth.d

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