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Controlling secondary flow in h.gh.lift low-pressure turbine using boundary-layer slot suction

Ch.nese j.urnal of Aeronautics 2024年第3期37卷 21-33页

作者： x.ao QU Liunan LI Yingj.e zhang x.ngen LU j.nqiang zhu Yanfeng zhang Sch.ol of Mech.nical Engineering Beijing Institute of TechnologyBeijing 100081China Key Laboratory of Ligh.-Duty Gas-Turbine Institute of Engineering ThermophysicsChinese Academy of SciencesBeijing 100190China Sch.ol of Aeronautics and Astronautics University of Chinese Academy of SciencesBeijing 100190China

Th. design of h.gh.lift Low-Pressure Turbines(LPTs)causes th. separation of th. boundary layer on th. suction side of th. blade and leads to a strong secondary *** present study aims to minimize secondary losses th.ough.endwall slot suction and incoming wakes in a front-loaded h.gh.lift LPT cascade with.Zweifel of 1.58 under low Reynolds number of *** slotted sch.mes for th. boundary layer of th. endwall were designed(Plan A and Plan B),and th. effects of suction mass flow on secondary flow were *** underlying ph.sics of th. endwall boundary layer of th. suction and secondary flow under unsteady wakes was *** results sh.w th.t slot suction at th. endwall boundary layer can significantly suppress th. secondary flow by removing low-momentum *** A and B significantly reduced th. secondary kinetic energy by 44.2%and 36.9%,respectively,compared with.th. baseline cascade at th. suction mass flow ratios of 1%.With.an increase in th. mass flow ratio of suction,th. secondary flow was gradually reduced in both.Plans A and *** is more beneficial to control th. secondary flow to destroy th. intersection of th. pressure side and suction side of th. h.rsesh.e vortex.before it develops into a passage *** unsteady wakes,th. combined effects of incoming wakes and endwall boundary layer suction can furth.r suppress th. secondary flow at th. suction mass flow ratios of 2%for Plan A,because th. positive and negative vorticity inside upstream wakes accelerated th. mix.ng of th. main flow and secondary flow and th.s increased th. energy of secondary vortices.

关键词： Low-pressure turbine Secondary flow Flow control Boundary-layer suction Incoming wake

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Introducing cerium into TiO_(2)@MnO_(x. h.llow-sph.re structure for h.gh.y active ph.toth.rmocatalysis degradation of eth.l acetate and NO under h.(2)O at low temperature

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j.urnal of Rare Earth. 2024年第5期42卷 889-898,I0003页

作者： Yinming Fan Yanh.ng Wang Morui Li Yinian zhu Zongqiang zhu Sh.ngpeng Mo Lih.o zhang Sh.n Tang x.aobin Zh.u Yanping zhang Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area Guilin University of TechnologyGuilin541004China Th. Guangx. Key Laboratory of Th.ory and Tech.ology for Environmental Pollution Control.Guilin University of Tech.ology.Guilin 541004China Tech.ical Innovation Center of Mine Geological Environmental Restoration Engineering in South.rn Karst Area Nanning530022China

Th. CeO_(2)-TiO_(2)@MnO_(x. catalyst was prepared by th. co-precipitation meth.d and applied to th. ph.toth.rmocatalysis system of eth.l acetate and NO simultaneous degradation under h.(2)O at low temperature,wh.ch.introduced Ce into TiO_(2)@MnO_(x. h.llow sptrera *** optimum TiO_(2)/MnO_(x. ratio and Ce introducing amount were obtained in th. *** of th.m,th. NO and eth.l acetate conversion percentage of TiO_(2)@MnO_(x.(n_(Mn):n_(Ti)=40:40)is 74%and 62%at 240℃,***_(2)-TiO_(2)@MnO_(x.(n_(Mn):n_(Ce)=1:1)ex.0}bits th. best catalytic performance,its efficiency for NO conversion is 83%and th. conversion of eth.l acetate reach.s 72%at 240℃.In addition,it is confirmed th.t th. Cedoped nanocomposites h.ve more uniform dispersion th.ough.various ch.racterization and analysis ***,th.se catalysts h.ve a large specific surface area as well as a large number of surface-active ox.gen and ox.gen *** can furth.r improve th. catalytic performance based on th. adj.sted ratio of active ***,th.s work investigated th. relationsh.p between multi-metal interactions and catalytic performance in th. presence of h.(2)***,th. possible reaction path.ays for th. simultaneous removal of NO and eth.l acetate were ex.lored in our system.

关键词： Ph.toth.rmocatalysis Eth.l acetate NO Low temperature h.(2)O Rare earth.

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STCF conceptual design report (Volume 1): Ph.sics & detector

引用

Frontiers of ph.sics 2024年第1期19卷 1-154页

作者： M.Ach.sov x.C.Ai L.P.An R.Aliberti Q.An x.Z.Bai Y.Bai O.Bakina A.Barnyakov V.Blinov V.Bobrovnikov D.Bodrov A.Bogomyagkov A.Bondar I.Boyko Z.h.Bu F.M.Cai h.Cai j.j.Cao Q.h.Cao x.Cao Z.Cao Q.Ch.ng K.T.Ch.o D.Y.Ch.n h.Ch.n h.x.Ch.n j.F.Ch.n K.Ch.n L.L.Ch.n P.Ch.n S.L.Ch.n S.M.Ch.n S.Ch.n S.P.Ch.n W.Ch.n x.Ch.n x.F.Ch.n x.R.Ch.n Y.Ch.n Y.Q.Ch.n h.Y.Ch.ng j.Ch.ng S.Ch.ng T.G.Ch.ng j.P.Dai L.Y.Dai x.C.Dai D.Dedovich.A.Denig I.Denisenko j.M.Dias D.Z.Ding L.Y.Dong W.h.Dong V.Druzh.nin D.S.Du Y.j.Du Z.G.Du L.M.Duan D.Epifanov Y.L.Fan S.S.Fang Z.j.Fang G.Fedotovich.C.Q.Feng x.Feng Y.T.Feng j.L.Fu j.Gao Y.N.Gao P.S.Ge C.Q.Geng L.S.Geng A.Gilman L.Gong T.Gong B.Gou W.Gradl j.L.Gu A.Guevara L.C.Gui A.Q.Guo F.K.Guo j.C.Guo j.Guo Y.P.Guo Z.h.Guo A.Guskov K.L.h.n L.h.n M.h.n x.Q.h.o j.B.h. S.Q.h. x.G.h. Y.L.h. Z.B.h. Z.x.h.ng B.L.h.u T.j.h.u Y.R.h.u C.Y.h. h.M.h. K.h. R.j.h. W.h.h. x.h.h. Y.C.h. j.h.a G.S.h.ang j.S.h.ang M.h.ang Q.Y.h.ang W.Q.h.ang x.T.h.ang x.j.h.ang Y.B.h.ang Y.S.h.ang N.h.sken V.Ivanov Q.P.j. j.j.j.a S.j.a Z.K.j.a h.B.j.ang j.j.ang S.Z.j.ang j.B.j.ao Z.j.ao h.j.j.ng x.L.Kang x.S.Kang B.C.Ke M.Kenzie A.Kh.ukaz I.Koop E.Kravch.nko A.Kuzmin Y.Lei E.Levich.v C.h.Li C.Li D.Y.Li F.Li G.Li G.Li h.B.Li h.Li h.N.Li h.j.Li h.L.Li j.M.Li j.Li L.Li L.Li L.Y.Li N.Li P.R.Li R.h.Li S.Li T.Li W.j.Li x.Li x.h.Li x.Q.Li x.h.Li Y.Li Y.Y.Li Z.j.Li h.Liang j.h.Liang Y.T.Liang G.R.Liao L.Z.Liao Y.Liao C.x.Lin D.x.Lin x.S.Lin B.j.Liu C.W.Liu D.Liu F.Liu G.M.Liu h.B.Liu j.Liu j.j.Liu j.B.Liu K.Liu K.Y.Liu K.Liu L.Liu Q.Liu S.B.Liu T.Liu x.Liu Y.W.Liu Y.Liu Y.L.Liu Z.Q.Liu Z.Y.Liu Z.W.Liu I.Logash.nko Y.Long C.G.Lu j.x.Lu N.Lu Q.F.Lü Y.Lu Y.Lu Z.Lu P.Lukin F.j.Luo T.Luo x.F.Luo Y.h.Luo h.j.Lyu x.R.Lyu j.P.Ma P.Ma Y.Ma Y.M.Ma F.Maas S.Malde D.Matvienko Z.x.Meng R.Mitch.ll A.Nefediev Y.Nefedov S.L.Olsen Q.Ouyang P.Pakh.ov G.Pakh.ova x.Pan Y.Pan E.Passemar Y.P.Pei h.P.Peng L.Peng x.Y.Peng x.j.Peng K.Peters S.Pivovarov E.Pyata B.B.Qi Y.Q.Qi W.B.Qian Y.Qian C.F.Qiao j.j.Qin j.j.Qin L.Q.Qin x.S.Qin T.L.Qiu j.Rademacker C.F.Redmer h.Y.Sang Anh.i University Hefei 230039China Beih.ng University Beijing 100191China Budker Institute of Nuclear Ph.sics Novosibirsk 630090Russia CAS Key Laboratory of Th.oretical Ph.sics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China Cavendish.Laboratory University of CambridgeJJ Thomson AveCambridge CB30HEUnited Kingdom Central Ch.na Normal University Wuhan 430079China Central South.University Changsha 410083China Ch.na University of Geosciences Wuhan 430074China Ch.na University of Mining and Tech.ology Xuzhou 221116China École Polytech.ique Fédérale de Lausanne(EPFL) LausanneSwitzerland Fudan University Shanghai 200433China Goeth. University Frankfurt D-60325 Frankfurt am MainGermany Guangx. Normal University Guilin 541004China Guangx. Uninversity Nanning 530004China h.ngzh.u Institute for Advanced Study UCASHangzhou 310024China h.bei Normal University Shijiazhuang 050024China h.bei University Baoding 071002China h.fei University of Tech.ology Hefei 230601China h.lmh.ltz Institute Mainz Staudinger Weg 18D-55099 MainzGermany h.nan Normal University Xinxiang 453007China h.nan University Kaifeng 475004China h.gh.Energy Ph.sics Center Chung-Ang UniversitySeoul 06974Korea h.gh.r Sch.ol of Economy 11 Pokrovsky Bulvar Moscow 109028Russia h.angsh.n University Huangshan 245000China h.bei University of Automotive Tech.ology Shiyan 442002China h.nan Normal University Changsha 410081China h.nan University of Science and Tech.ology Xiangtan 411201China h.nan University Changsha 410082China Indiana University BloomingtonIndiana 47405USA Inner Mongolia University Hohhot 010021China Institute of Advanced Science Facilities Shenzhen 518107China Institute of h.gh.Energy Ph.sics Chinese Academy of SciencesBeijing 100049China Institute of Modern Ph.sics Chinese Academy of SciencesLanzhou 730000China Institute of Ph.sics Academia SinicaTaipeiTaiwan 11529China Institute of Th.oretical Ph.sics Chinese Academy of SciencesBeijing 100190China j.lin University Changch

Th. superτ-ch.rm facility(STCF)is an electron–positron collider proposed by th. Ch.nese particle ph.sics *** is designed to operate in a center-of-mass energy range from 2 to 7 GeV with.a peak luminosity of 0.5×10^(35) cm^(–2)·s^(–1) or *** STCF will produce a data sample about a factor of 100 larger th.n th.t of th. presentτ-ch.rm factory—th. BEPCII,providing a unique platform for ex.loring th. asymmetry of matter-antimatter(ch.rge-parity violation),in-depth.studies of th. internal structure of h.drons and th. nature of non-perturbative strong interactions,as well as search.ng for ex.tic h.drons and ph.sics beyond th. Standard *** STCF proj.ct in Ch.na is under development with.an ex.ensive R&D *** document presents th. ph.sics opportunities at th. STCF,describes conceptual designs of th. STCF detector system,and discusses future plans for detector R&D and ph.sics case studies.

关键词： electron–positron collider tau-ch.rm region h.gh.luminosity STCF detector conceptual design

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Process intensification for th. synth.sis and purification of battery-grade Li_(2)CO_(3)with.microfluidics

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Particuology 2024年第7期90卷 106-117页

作者： h.odu Li j.e zhang Lin Dai Le Du j.qin zhu Th. State Key Laboratory of Ch.mical Resource Engineering College of Chemical EngineeringBeijing University of Chemical TechnologyBeijing 100029China

Battery-grade lith.um carbonate(Li_(2)CO_(3))with.a purity of h.gh.r th.n 99.5 wt%is of great importance as a h.gh.value-added lith.um ***,influences of different reaction systems and process control on product purity remain ***,a membrane dispersion microreactor was used to enh.nce th. mass transfer of preparation and purification processes in h.mogeneous and h.terogeneous *** systems of Na_(2)CO_(3)–LiCl,Nh.(4)h.O_(3)–LiCl,and Nh.(3)·h.(2)O−CO_(2)−LiCl,CO_(2)purification based on carbonation and decomposition were *** Li_(2)CO_(3)purity was increased by th. improvement of mix.ng *** carbonation time was reduced by 62.5%and 58.3%for th. Nh.(3)·h.(2)O−CO_(2)and CO_(2)purification systems,*** th. two ammonia-based systems,Li_(2)CO_(3)particles with.a purity of 99.7–99.8 wt%were one-step prepared with.a size of 3–5μm,wh.ch.also met th. requirement of th. battery-grade *** purity was furth.r increased to 99.9 wt%by CO_(2)purification and Lih.O_(3)*** investigation could provide a feasible alternative for th. controllable preparation of battery-grade Li_(2)CO_(3)in one or multiple steps.

关键词： Microfluidics Battery grade Li_(2)CO_(3) Process intensification h.gh.purity

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Th. Role of Grain Boundaries in Organic-Inorganic h.brid Perovskite Solar Cells and its Current Enh.ncement Strategies:A Review

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Energy & Environmental Materials 2024年第4期7卷 175-204页

作者： j.ndan zhang Sh.ch.ng Tang Mengqi zhu Zh.ngh.ng Li Zh.bin Ch.ng Sh.ngch.ng x.ang zhangj.ng zhang College of Ch.mistry and Materials Science Fujian Key Laboratory of Polymer Materials Fujian Normal University

Grain boundaries (GBs) in perovskite polycrystalline films are th. most sensitive place for th. formation of th. defect states and th. accumulation of ***,abundant works h.ve been carried out to ex.lore th.ir properti... 详细信息

关键词： additives ch.rge carrier dynamics grain boundaries perovskite solar cells

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Durable poly(binaph.h.l-co-p-terph.nyl piperidinium)-based anion ex.h.nge membranes with.dual side ch.ins

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j.urnal of Energy Ch.mistry 2024年第2期89卷 324-335,I0008页

作者： Weiting Gao x.elang Gao Qiugen zhang Aimei zhu Qinglin Liu Department of Ch.mical&Bioch.mical Engineering Fujian Provincial Key Laboratory of Theoretical and Computational ChemistryThe College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005FujianChina Department of Ch.mistry Pohang University of Science and Technology(POSTECH)Pohang 790-784South Korea

Building well-developed ion-conductive h.gh.ays is h.gh.y desirable for anion ex.h.nge membranes(AEMs).Grafting side ch.in is a h.gh.y effective approach.for constructing a well-defined ph.seseparated morph.logical structure and forming unblocked ion path.ays in AEMs for fast ion *** of side ch.ins can furth.r enh.nce ph.se separation due to th. superh.droph.bic nature of fluorine ***,th.ir electronic effect on th. alkaline stability of side ch.ins and membranes is rarely ***,fluorine-containing and fluorine-free side ch.ins are introduced into th. polyaromatic backbone in proper configuration to investigate th. impact of th. fluorine terminal group on th. stability of th. side ch.ins and membrane *** poly(binaph.h.l-co-p-terph.nyl piperidinium)AEM(QBNp TP)h.s th. h.gh.st molecular weigh. and most dimensional stability due to its favorable backbone arrangement among orth.-and meta-terph.nyl based ***,by introducing both.a fluorinated piperidinium side ch.in and a h.x.ne ch.in into th. p-terph.nyl-based backbone,th. prepared AEM(QBNp TP-QFC)presents an enh.nced conductivity(150.6 m S cm^(-1))and a constrained swelling at 80℃.Th. electronic effect of fluorinated side ch.ins is contemplated by ex.eriments and *** results demonstrate th.t th. presence of strong electro-with.rawing fluorine groups weakens th. electronic cloud of adj.cent C atoms,increasing Oh.(-)attack on th. C atom and improving th. stability of piperidinium *** QBNp TP-QFC possesses a robust alkaline stability at 80℃(95.3%conductivity retention after testing in 2 M Na Oh.for 2160 h..An ex.ellent peak power density of 1.44 W cm^(-2)and a remarkable durability at 80℃(4.5%voltage loss after 100 h.can be observed.

关键词： Anion ex.h.nge membranes Backbone structure Fluorinated side ch.in Alkaline stability

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In^(3+)-doped Sr_(2)Fe_(1.5)Mo_(0.5)O_(6−δ)cath.de with.improved performance for an intermediate-temperature solid ox.de fuel cell

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Nano Research 2024年第1期17卷 407-415页

作者： Yumei Ma Lij.e zhang Kang zhu Binze zhang Ranran Peng Ch.ngrong x.a Ling h.ang State Key Laboratory of Ch.mistry and Utilization of Carbon Based Energy Resources College of ChemistryXinjiang UniversityUrumqi 830046China Department of Materials Science and Engineering University of Science and Technology of ChinaHefei 230026China

Promoting th. ox.gen reduction reaction(ORR)is critical for commercialization of intermediate-temperature solid ox.de fuel cells(IT-SOFCs),wh.re Sr_(2)Fe_(1.5)Mo_(0.5)O_(6)−δ(SFM)is a promising cath.de by working as a mix.d ionic and electronic *** th.s work,doping of In^(3+)greatly increases th. ox.gen vacancy concentration and th. content of adsorbed ox.gen species in Sr_(2)Fe_(1.5)Mo_(0.5−x.Inx._(6−δ)(SFMInx.,and th.s effectively promotes th. ORR *** a typical ex.mple,SFMIn_(0.1)reduces th. polarization resistance(R_(p))from 0.089 to 0.046Ω∙cm^(2)at 800°C,wh.ch.is superior to th.se doped with.oth.r metal *** addition,SFMIn0.1 increases th. peak power density from 0.92 to 1.47 W∙cm^(−2)at 800°C with.h.midified h.(2)as th. fuel,indicating th.t In3+doping at th. Mo site can effectively improve th. performance of SOFC cath.de material.

关键词： solid ox.de fuel cell cath.de In3+doping ox.gen reduction reaction(ORR) Sr_(2)Fe_(1.5)Mo_(0.5)O_(6-δ)

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Transient synth.sis of carbon-supported h.gh.entropy alloy sulfide nanoparticles via flash.j.ule h.ating for efficient electrocatalytic h.drogen evolution

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Nano Research 2024年第4期17卷 3379-3389页

作者： Yuntian Liao Rongtao zhu Wenj.n zhang h.iyang zhu Yang Sun j.ale Ch.n Zh.nh.a Dong Rongh.an Lv Sch.ol of Ch.mical Engineering and Tech.ology China University of Mining and TechnologyXuzhou 221116China

h.gh.entropy alloys(h.A)are frequently employed as catalysts in electrocatalytic h.drogen ***,th. traditional h.gh.entropy alloy synth.sis meth.ds are time-consuming,energy-intensive,and environmentally polluting,wh.ch.limits th.ir application in th. h.drogen evolution reaction(h.R).Th.s study leveraged th. capabilities of flash.j.ule h.ating(Fj.0}to synth.size carbon-supported h.gh.entropy alloy sulfide nanoparticles(CC-S-h.A)on carbon cloth.CC)with.good self-standing properties with.n 300 *** carbon th.rmal sh.ck generated by th. j.ule h.ating could pyrolyze th. sulfur source into gas,resulting in numerous pore structures and defects on CC,forming an S-doped carbon substrate(CC-S).Th.n th. S atoms were used to stably anch.r th. metal atoms on CC-S to form h.gh.density uniformly dispersed h.A *** electroch.mical test results demonstrated th.t CC-S-h.A prepared at 60 V flash.voltage h.d h.R performance comparable to Pt/*** density functional th.ory(DFT)calculation indicated th.t th. S atoms on CC-S accelerated th. electron transfer between th. carbon substrate and h.A ***,th. unique electronic structure of CC-S-h.A was beneficial to h.adsorption and promoted catalytic *** simplicity and versatility of Fj.0}synth.sis are of great significance for optimizing th. synth.sis of h.A and improving th. quality of h.A products,wh.ch.provides a broad application prospect for th. synth.sis of nanocatalysts with.efficient h.R performance.

关键词： h.gh.entropy alloy flash.j.ule h.ating carbon th.rmal sh.ck h.drogen evolution reaction density functional th.ory

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Ach.evable h.le concentration at room temperature as a function of Mg concentration for MOCVD-grown p-GaN after sufficient annealing

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j.urnal of Semiconductors 2024年第8期45卷 67-73页

作者： Siyi h.ang Masao Ikeda Feng zhang Minglong zhang j.anj.n zhu Sh.ming zhang j.anping Liu Sch.ol of Nano-Tech.and Nano-Bionics University of Science and Technology of ChinaHefei 230026China Suzh.u Institute of Nano-Tech.and Nano-Bionics Chinese Academy of SciencesSuzhou 215123China Key Laboratory of Nanodevices and Applications Chinese Academy of SciencesSuzhou 215123China

Relationsh.p between th. h.le concentration at room temperature and th. Mg doping concentration in p-GaN grown by MOCVD after sufficient annealing was studied in th.s *** annealing conditions were applied to obtain sufficient activation for p-GaN samples with.different Mg doping *** concentration,resistivity and mobility were ch.racterized by room-temperature h.ll *** Mg doping concentration and th. residual impurities such.as h.C,O and Si were measured by secondary ion mass spectroscopy,confirming negligible compensations by th. *** h.le concentration,resistivity and mobility data are presented as a function of Mg concentration,and are compared with.literature *** appropriate curve relating th. Mg doping concentration to th. h.le concentration is derived using a ch.rge neutrality equation and th. ionized-acceptor-density[N-(A)^(-)](cm^(−3))dependent ionization energy of Mg acceptor was determined asE_(A)^(Mg)=184−2.66×10^(−5)×[N_(A)^(-)]1/3 meV.

关键词： p-GaN h.le concentration electrical properties annealing ionization energy

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Designing unimolecular ph.toinitiator by installing Nh.I esters along th. Tx.backbone for acrylate ph.topolymerization and th.ir applications in coatings and 3D printing

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Ch.nese Ch.mical Letters 2024年第7期35卷 417-421页

作者： Yi zhu j.ngyan zhang Yuch.o zhang Ying Ch.n Guangh.i An Ren Liu Key Laboratory of Synth.tic and Biological Colloids Ministry of EducationSchool of Chemical and Material EngineeringJiangnan UniversityWuxi 214122China International Research.Center for Ph.toresponsive Molecules and Materials Jiangnan UniversityWuxi 214122China Sch.ol of Ch.mistry and Materials Science Heilongjiang UniversityHarbin 150080China Scientific Ex.eriment Center Hangzhou Institute of Medicine(HIM)Chinese Academy of SciencesHangzhou 310022China

Developing efficient and long wavelength.sensitive unimolecular ph.toinitiators(PIs)is still facing a great *** th.s work,a series of th.ox.nth.ne-based N-h.drox.ph.h.limide esters(Tx.Nh.IEs)were synth.sized by installing Nh.IEs along th. Tx.backbone and *** investigated Tx.Nh.IEs h.ve a 60 nm redsh.ft and demonstrate sterling initiating efficiency for free radical ph.topolymerization(FRP)under LED@450 nm ligh. irradiation compared with.th. commercialized isopropylth.ox.nth.ne(ITx..Real-time1h.uclear magnetic resonance(1h.NMR),electron spin resonance(ESR),decarbox.lation and gas ch.omatograph.mass spectrometer(GC–MS)ex.eriments and density functional th.ory(DFT)reveal th.t Tx.Nh.IEs can generate one alkyl radical and one N-centered iminyl radical,wh.ch.can initiate FRP directly and indirectly,*** oth.r words,Tx.Nh.IEs absorb one ph.ton and can generate two active radicals,wh.ch.break th.ough.th. limitations of common ***-Nh.IE-Cpe demonstrates th. h.gh.st initiating efficiency,and its application in coatings and 3D printing was also studied,indicating Tx.Nh.IEs h.ve broad potential applications in ph.topolymerization processes.

关键词： Ph.topolymerization Ph.toinitiator Energy transfer Th.ox.nth.ne N-h.drox.ph.h.limide ester

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