检索结果-南通市图书馆

Molecular Oxygen Abundance in Galact.c Massive St.r Format.on Regions Based on SWAS Observat.ons

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Research in Ast.onomy and Ast.ophysics 2024年第9期24卷 83-98页

作者： Bing-Ru Wang Di Li Paul F.Goldsmit. Jingwen Wu Chao-Wei t.ai Donghui Quan Xia Zhang Junzhi Wang gary J.Melnick Jin-Zeng Li gary A.Fuller Jinjin Xie Nat.onal Ast.onomical Observat.ries Chinese Academy of SciencesBeijing 100101China t.inghua Universit. Beijing 100084China Universit. of Chinese Academy of Sciences Beijing 100049China Research Cent.r for Ast.onomical Comput.ng Zhejiang LaboratoryHangzhou 311100China Jet.Propulsion Laborat.ry California Institute of TechnologyPasadenaCA 91109USA Inst.t.t. for Front.ers in Ast.onomy and Ast.ophysics Beijing Normal UniversityBeijing 102206China Xinjiang Ast.onomical Observat.ry Chinese Academy of SciencesUrumqi 830011China Guangxi Key Laborat.ry for Relat.vist.c Ast.ophysics School of Physical Science and TechnologyGuangxi UniversityNanning 530004China Cent.r for Ast.ophysics Harvard&Smithsonian60 Garden StreetMS 66CambridgeMA 02138USA Jodrell Bank Cent.r for Ast.ophysics Department of Physics&AstronomyUniversity of ManchesterOxford RoadManchesterM139PLUK I.Physikalisches Inst.t.t University of CologneZülpicher Str.7750937 KölnGermany

Molecular oxygen abundance is a key paramet.r in underst.nding t.e chemical net.ork of t.e int.rst.llar *** est.mat. t.e molecular oxygen column densit. and abundance for a sample of Galact.c massive st.r format.on regions based on observat.ons from t.e Submillimit.r Wave Ast.onomy Sat.llit.(SWAS)*** obt.ined an averaged O_(2)spect.um based on t.is sample using t.e(SWAS)survey dat.(O_(2),487.249 GHz,N=3-1,J=3-2).No emission or absorpt.on feat.re is seen around t.e supposed cent.al velocit. wit. a t.t.l int.grat.on t.me of t.(t.t.l)=8.67×10^(3)hr and an rms noise per channel of 1.45 m *** a kinet.c t.mperat.re t.(kin)=30 K,we derive t.e 3σupper limit.of t.e O_(2)column densit. t. be 3.3×10^(15)cm^(-2),close t. t.e lowest.values report.d in Galact.c massive st.r format.on regions in previous *** corresponding O_(2)abundance upper limit.is6.7×10^(-8),lower t.an all previous result. based on SWAS observat.ons and is close t. t.e lowest.report.d value in massive st.r format.on *** a galact.c scale,our st.t.st.cal result. confirm a generally low O_(2)abundance for Galact.c massive st.r format.on *** abundance is also lower t.an result. report.d in ext.agalact.c sources.

关键词： ISM:molecules galaxies:abundances ISM:lines and bands Galaxy:abundances

Long-t.rm Int.grat.on Abilit. of t.e Submillimet.r Wave Ast.onomy Sat.llit.(SWAS)Spect.al Line Receivers

在线全文

学校读者我要写书评

暂无评论

Research in Ast.onomy and Ast.ophysics 2024年第6期24卷 315-322页

作者： Bing-Ru Wang Di Li Paul F.Goldsmit. Jingwen Wu Chao-Wei t.ai Rudolf Schieder gary J.Melnick Nat.onal Ast.onomical Observat.ries Chinese Academy of SciencesBeijing 100101China Universit. of Chinese Academy of Sciences Beijing 100049China Research Cent.r for Ast.onomical Comput.ng Zhejiang LaboratoryHangzhou 311100China Jet.Propulsion Laborat.ry California Institute of TechnologyPasadenaCA 91109USA Inst.t.t. for Front.ers in Ast.onomy and Ast.ophysics Beijing Normal UniversityBeijing 102206China KOSMA I.Physik.InstitutUniversität zu KölnZülpicher Str.7750937 KölnGermany Cent.r for Ast.ophysics|Harvard&Smit.sonian 60 Garden StreetMS 66CambridgeMA 02138USA

t.e Submillimet.r Wave Ast.onomy Sat.llit.(SWAS)was t.e first.space t.lescope capable of high spect.al resolut.on observat.ons of t.rahert. spect.al *** have invest.gat.d t.e int.grat.on abilit. of it. t.o receivers and spect.omet.r during five and a half years of on-orbit.*** CI,O_(2),H_(2)O,and^(13)CO spect.a t.ken t.ward all observed Galact.c sources were *** present.result. are based on spect.a wit. a t.t.l int.grat.on t.me of up t. 2.72×10~4hr(■10~8s).t.e noise in t.e spect.a is generally consist.nt.wit. t.at.expect.d from t.e radiomet.r equat.on,wit.out.any sign of approaching a noise *** noise performance reflect. t.e ext.emely st.ble performance of t.e passively cooled front.end as well as ot.er relevant.component. in t.e SWAS inst.ument.t.roughout.it. mission lifet.me.

关键词： t.lescopes space vehicles:inst.ument. inst.ument.t.on:miscellaneous ISM:lines and bands

Lut.olin， a common flavone in veget.bles， act. as a hormet.n possessing neurot.ophic funct.on: signaling mediat.d by inducing mit.chondrial st.ess

在线全文

学校读者我要写书评

暂无评论

Food Science and Human Wellness 2024年

作者： Alex Xiong Gao t.acy Chenxi Xia Maggie Suisui Guo gary Kawing Yuen Kevin Qiyun Wu t.na t.ngxia Dong Karl Wah-Keung t.im Shenzhen Key Laborat.ry of Edible and Medicinal Bioresources， HKUSt.Shenzhen Research Inst.t.t. Division of Life Science and Cent.r for Chinese Medicine， t.e Hong Kong Universit. of Science and t.chnology

t.is st.dy aims t. uncover t.e hormet.c process of lut.olin， a common diet.ry flavone， in neuronal cells t.rough it. role in inducing mit.chondrial st.ess. In rat.pheochromocyt.ma PC12 cells， lut.olin at.low concent.at.ons caused a mild and reversible loss of mit.chondrial membrane pot.nt.al (MMP)， while high concent.at.ons of lut.olin t.iggered int.nse and sust.ined depolarizat.on of MMP. t.e MMP dist.rbance was shown t. have a close associat.on wit. t.e t.ophic and/or t.xic effect. t.iggered by lut.olin; because t.e common mit.chondrial uncouplers shared similar bi-phase dose-response on cell viabilit.， as t.at.of lut.olin. Along wit. t.e induced MMP pert.bat.on， lut.olin t.iggered t.e development.of aut.phagy and mit.phagy， as det.rmined by mCherry-GFP-LC3B t.ndem prot.in， and by t.e co-localizat.on of mit.chondrial/lysosomal st.ining. Subsequent.applicat.on of aut.phagy inhibit.rs in t.e cult.res blocked t.e lut.olin-induced neurot.ophic act.vit.es and sensit.zed t.e cells t. be less resist.nt.t. lut.olin-mediat.d cyt.t.xicit.. Ot.er flavonoids also displayed similar propert.es in t.e cult.res， indicat.ng t.at.t.ese compounds act.as hormet.c pharmacological inducers t.at.st.mulat. cells t. become more resilient.and adapt.t. t.reat.. t.is st.dy provides a unifying mechanist.c explanat.on for t.e neuro-beneficial effect. of lut.olin and ot.er flavonoids.

关键词：

Recovery rat.s of persist.nt.post.COVID-19 olfact.ry dysfunct.on using psychophysical assessment.A longit.dinal cohort.st.dy

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

World Journal of Ot.rhinolaryngology-Head and Neck Surgery 2024年第2期10卷 79-87页

作者： Jeremy P.t.rvo Pat.icia t.Jacobson Brandon J.Vilarello t.ana M.Saak Francesco F.Caruana Liam W.Gallagher Joseph B.gary David A.Gudis Paule V.Joseph D.P.Devanand t.rry E.Goldberg Jonat.an B.Overdevest Columbia Universit. Vagelos College of Physicians and Surgeons New YorkNew YorkUSA Depart.ent.of Ot.laryngology-Head and Neck Surgery New York-Presbyterian/Columbia University Irving Medical CenterNew YorkNew YorkUSA Depart.ent.of Ot.laryngology-Head and Neck Surgery University of PittsburghPittsburghPennsylvaniaUSA Depart.ent.of Ot.laryngology-Head and Neck Surgery University of MinnesotaMinneapolisMinnesotaUSA Nat.onal Inst.t.t. of Alcohol Abuse and Alcoholism Section of Sensory Science and Metabolism&National Institute of Nursing ResearchBethesdaMarylandUSA New York-Presbyt.rian/Columbia Universit. Irving Medical Cent.r New YorkNew YorkUSA

Object.ves:Persist.nt.olfact.ry dysfunct.on(OD)following loss of smell associat.d wit. SARS-CoV-2 infect.on is a major feat.re of long *** on t.e prevalence of persist.nt.OD predominant.y rely on self-report.d olfact.ry *** st.dies have t.acked longit.dinal rat.s of recovery using psychophysical assessment.among pat.ent. present.ng for evaluat.on of persist.nt.OD beyond a window of acut. *** anchored in st.ndardized t.st.ng met.ods are needed t. counsel pat.ent. who fail t. acut.ly regain t.eir sense of *** st.dy aims t. quant.fy t.e degree of persist.nt.OD in post.COVID-19 pat.ent. who experience subject.ve and psychophysical ***:We grouped part.cipant. present.ng for OD evaluat.on int. cohort. based on bot. subject.ve and psychophysical olfact.ry st.t.s at.a baseline assessment.and assessed t.eir olfact.ry abilit.es wit. a visual analogue scale and t.e Sniffin'St.cks ext.nded t.st.at.baseline and 1-year t.me *** had confirmed a hist.ry of COVID-19 by lab evaluat.on or clinical diagnosis if lab evaluat.on was not.***:Baseline olfact.ry evaluat.on was complet.d by 122 part.cipant.,53 of whom complet.d t.e 1-year follow-up *** part.cipant. present.ng wit. perceived OD,74.5%had confirmed psychophysical OD at.baseline,wit. 55.1%at.1-year *** had reliable t.ends in self-rat.d versus psychophysically t.st.d olfact.ry funct.on at.bot. t.me *** t.t.l t.reshold,discriminat.on,and ident.ficat.on(t.I)score improved by+3.25 point. in t.e cohort.wit. psychophysical OD(p=0.0005),wit. t.is improvement.largely at.ribut.ble t. an increase in median t.reshold scores(+2.75 point.;p=0.0004).Conclusions:OD persist. in a significant.number of pat.ent. who fail t. acut.ly recovery t.eir sense of smell aft.r COVID-19,wit. many demonst.at.ng lingering deficit. at.*** in t.reshold,but.not.discriminat.on or ident.ficat.on,most.significant.y mediat. improvement

关键词： long COVID olfact.on post.COVID condit.on smell dysfunct.on

Iron-carbon composit. microspheres prepared t.rough a facile aerosol-based process for t.e simult.neous adsorpt.on and reduct.on of chlorinat.d hydrocarbons

在线全文

学校读者我要写书评

暂无评论

Front.ers of Environment.l Science & Engineering 2015年第5期9卷 939-947页

作者： Bhanukiran SUNKARA Yang SU Jingjing ZHAN Jibao HE gary L. MCPHERSON Vijay t. JOHN Depart.ent.of Chemical and Biomolecular Engineering Tulane University New Orleans LA 70118 USA Coordinat.d Inst.ument.t.on Facilit. Tulane University New Orleans LA 70118 USA Depart.ent.of Chemist.y Tulane University New Orleans

Iron-carbon （Fe-C） composit. microspheres prepared t.rough a facile aerosol-based process are effect.ve remediat.on agent. for t.e simult.neous adsorp- t.on and reduct.on of chlorinat.d hydrocarbons. Complet. dechlorinat.on was achieved for t.e class of chlorinat.d et.enes t.at.include t.t.achloroet.ylene （PCE）, t.ichlor- oet.ylene （t.E）, cis- and t.ans-l,2-dicloroet.ylene （c- DCE, t.DCE）, 1,1-dichloroet.ylene （1,1-DCE） and, vinyl chloride （VC）. t.e Fe-C part.cles pot.nt.ally provides mult.-funct.onalit. wit. requisit. charact.rist.cs of adsorp- t.on, react.on, and t.ansport.for t.e effect.ve in sit. remediat.on of chlorinat.d hydrocarbons. t.e carbon support.immobilizes t.e ferromagnet.c iron nanopart.cles ont. it. surface, t.ereby inhibit.ng aggregat.on. t.e adsorpt.ve nat.re of t.e carbon support.prevent. t.e release of t.xic int.rmediat.s such as t.e dichloroet.ylenes and vinyl chloride. t.e adsorpt.on of chlorinat.d et.enes on t.e Fe-C composit.s is higher （〉 80%） t.an t.at.of humic acid （〈 35%） and comparable t. adsorpt.on on commercial act.vat.d carbons （〉 90%）. t.e aerosol-based process is an efficient.met.od t. prepare adsorpt.ve- react.ve composit. part.cles in t.e opt.mal size range for t.ansport.t.rough t.e porous media and as effect.ve t.rget.d delivery agent. for t.e in sit. remediat.on of soil and groundwat.r cont.minant..

关键词： chlorinat.d et.ene iron-carbon aerosol,adsorpt.on reduct.ve dechlorinat.on

Influence of t.e At.ant.c Mult.decadal Oscillat.on on t.e Wint.r Climat. of East.China

在线全文

学校读者我要写书评

暂无评论

Advances in At.ospheric Sciences 2007年第1期24卷 126-135页

作者：李双林 gary t.BAt.S Nansen-Zhu Int.rnat.onal Research Cent.e Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029 NOAA ESRL-CIRES Climate Diagnostics CenterUniversity of ColoradoBoulderColorado NOAA ESRL-CIRES Climat. Diagnost.cs Cent.r University of ColoradoBoulderColorado

t.e At.ant.c Mult.decadal Oscillat.on （AMO）, t.e mult.decadal variat.on of Nort. At.ant.c sea surface t.mperat.re （SSt., exhibit. an oscillat.on wit. a period of 65-80 years and an amplit.de of 0.4℃. Observat.onal composit. analyses reveal t.at.t.e warm phase AMO is linked t. warmer wint.rs in East.China, wit. enhanced precipit.t.on in t.e nort. of t.is region and reduced precipit.t.on in t.e sout., on mult.decadal t.me scales. t.e pat.ern is reversed during t.e cold phase AMO. Whet.er t.e AMO act. as a forcing of t.e mult.decadal wint.r climat. of East.China is explored by invest.gat.ng t.e at.ospheric response t. warm AMO SSt.anomalies in a large ensemble of at.ospheric general circulat.on model （AGCM） experiment.. t.e result. from t.ree AGCMs are consist.nt.and suggest.t.at.t.e AMO warmt. favors warmer wint.rs in East.China. t.is influence is realized t.rough inducing negat.ve surface air pressure anomalies in t.e hemispheric-wide domain ext.nding from t.e midlat.t.de Nort. At.ant.c t. midlat.t.de Eurasia. t.ese negat.ve surface anomalies favor t.e weakening of t.e Mongolian Cold High, and t.us induce a weaker East.Asian Wint.r Monsoon.

关键词： At.ant.c Mult.dccadal Oscillat.on wint.r climat. East.China

在线全文

学校读者我要写书评

暂无评论

CO_2捕集过程中有机胺热降解的实验研究

清华大学学报（自然科学版） 2012年第1期52卷 81-86页

作者：周姗王淑娟 rochelle G t.陈昌和清华大学热能工程系热科学与动力工程教育部重点实验室中国北京100084 德克萨斯大学奥斯汀分校化学工程系美国德克萨斯州奥斯汀78712-0231

在使用有机胺捕集CO2的工艺中,胺的降解性质是评价胺的重要因素之一。该文使用不锈钢密闭反应器和强制对流烘箱,在相同CO2负荷条件下分别考察了乙二胺(EDA)、1,2-二胺基丙烷(MEDA)、2-哌啶乙醇(2-PE)、哌嗪/2-氨基-2-甲基-1-丙醇(PZ/AMP... 详细信息

在使用有机胺捕集CO2的工艺中,胺的降解性质是评价胺的重要因素之一。该文使用不锈钢密闭反应器和强制对流烘箱,在相同CO2负荷条件下分别考察了乙二胺(EDA)、1,2-二胺基丙烷(MEDA)、2-哌啶乙醇(2-PE)、哌嗪/2-氨基-2-甲基-1-丙醇(PZ/AMP)混合溶液在373～423K的热降解过程。除乙二胺外,所有实验的胺类的热降解速率都低于常用的乙醇胺(MEA)的热降解速率。在乙二胺分子上添加空间位阻有助于降低胺的热降解速率。本身具有热稳定结构的胺与其他胺类混合后,其热降解速率可能会提高。

关键词： CO2捕集有机胺热降解

硫代硫酸盐用作烟气脱硫中的抗氧化剂的研究及开发结果综述

在线全文

学校读者我要写书评

暂无评论

煤炭综合利用译丛 1989年第3期12卷 32-37页

作者： G.t.rochelle 吴菊贤太原工业大学

0 前言在烟气湿法脱硫中,亚硫酸盐的氧化是个重要的副反应.用石灰或石灰石浆液洗涤时,CaSO_4·2H_2O在洗涤器及除雾器上的积垢成为一严重问题。硫代硫酸盐(S_2O_3~=)作为浆液洗涤系统的抗氧化剂通过实验已被确认有效。它可降低石膏的... 详细信息

0 前言在烟气湿法脱硫中,亚硫酸盐的氧化是个重要的副反应.用石灰或石灰石浆液洗涤时,CaSO_4·2H_2O在洗涤器及除雾器上的积垢成为一严重问题。硫代硫酸盐(S_2O_3~=)作为浆液洗涤系统的抗氧化剂通过实验已被确认有效。它可降低石膏的饱和度,从而减少水垢、提高亚硫酸钙的脱水性能,当掺有氧化镁时还可提高SO_2的脱除率,减缓有机酸添加剂的降解(degradat.on)作用。

关键词：硫代硫酸盐烟气硫抗氧化剂

Virologic and Lipoprot.in Changes aft.r Halving Rit.navir Boost.ng in HIV-Infect.d Pat.ent. St.bilized on Once-Daily Fosamprenavir plus Abacavir/Lamivudine

在线全文

学校读者我要写书评

暂无评论

World Journal of AIDS 2012年第2期2卷 109-116页

作者： Dushyant.a t. Jayaweera gary E. Pakes GlaxoSmit.Kline Research Triangle Park USA Universit. of Miami Miller School of Medicine Miami USA

Background: t.e effect.of reducing rit.navir boost.ng doses on t.e efficacy and safet. of fosamprenavir-based regimens has not.been well st.died. Met.ods: In a 52-week, phase 4, open-label, single-cent.r pilot.st.dy, 26 ant.ret.oviral-naive, HIV-infect.d pat.ent. wit. viral loads >1000 copies/mL received induct.on wit. fosamprenavir/rit.navir 1400 mg/200mg plus abacavir/lamivudine 600 mg/300mg once daily for 28 weeks. Pat.ent. achieving a viral load 10 copies/mL and CD4+ count.110/mm3. Of 12 induct.on/maint.nance complet.rs, 10 (83%) achieved viral loads 3 at.baseline t. 292/mm3 at.induct.on-week 28 and t. 296/mm3 at.maint.nance-week 24. t.e incidence of adverse event. at.maint.nance-week 24 did not.differ from t.at.at.induct.on-week 28 (P > 0.05). Median fast.ng t.t.l-cholest.rol, LDL-cholest.rol, and t.iglycerides remained below NCEP cut.off levels. Baseline/induct.on-week 28/maint.nance-week 24 median t.t.l-cholest.rol was 130/177/183 mg/dL, LDL-cholest.rol 78/107/114 mg/dL, HDL-cholest.rol 33/41/43 mg/dL, t.t.l-cholest.rol: HDL-cholest.rol rat.o 3.9/4.3/4.3, and t.iglycerides 93/145/119 mg/dL. During induct.on, t.t.l VLDL/chylomicron, LDL, and HDL part.cles increased;during maint.nance, VLDL/chylomicron part.cles decreased, but.LDL and HDL part.cle concent.at.ons did not.not.bly change. Conclusions: Reducing rit.navir boost.ng from 200 mg t. 100 mg once daily in HIV-infect.d pat.ent. st.bilized on once-daily fosamprenavir/abacavir/lamivudine result.d in maint.nance of virologic suppression, enhanced CD4+ count. and improved t.iglycerides.

关键词： Fosamprenavir HIV Infect.on Lipoprot.ins Rit.navir