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The Relative Imp.rtance of Natural Disturbances and Local Site Factors on Woody Vegetation Regeneration Diversity across a Large, Contiguous Forest Region

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Op.n Journal of Forestry 2013年第3期3卷 88-98页

作者： gerardo p. reyes Daniel Kneeshaw Louis de Grandp.é Dep.rtment of Biological Sciences Centre for Forest Research University of Quebec in Montreal Montreal Canada Dep.rtment of Biological Sciences Centre for Forest Research University of Quebec in Montreal Montreal Canada Faculty of Interdiscip.inary Studies Lakehead University Orillia Canada Dep.rtment of Biological Sciences Centre for Forest Research University of Quebec in Montreal Montreal Canada Natural Resources Canada Canadian Forest Service Laurentian Forestry Centre Ste-Foy Canada

Stand-level diversity after natural disturbance can p.tentially differ across a large, contiguous forest region desp.te being dominated by the same canop. sp.cies throughout as differences in disturbance typ.s and local site conditions can regulate sp.cies distribution. Our main objective was to examine the relative imp.rtance of natural disturbances (sp.uce budworm (Choristoneura fumiferana) outbreak, windthrow, and their interaction) and local site factors (climate, p.ysiograp.y, and stand structure and comp.sition variables) on woody vegetation diversity among three, p.ysiograp.ically distinct locations across a large, contiguous forest region. Seventy-six Abies balsamea-Betula sp.. stands affected by natural disturbance were comp.red and analysed using canonical ordination methods, diversity indices, and ANOVA. Different combinations of factors were imp.rtant for vegetation re-establishment at each location. Differences in alp.a (α), beta (β), gamma (γ), Shannon’s H’, and evenness (J) diversity indices were observed among locations across the study region. Our findings indicate that while certain p.ocesses are imp.rtant for maintaining canop. dominance by Abies balsamea and Betula sp.. throughout the region, different combinations of factors were imp.rtant for creating variation in woody sp.cies diversity among locations that resulted in greater woody sp.cies diversity at the regional scale.

关键词： Regeneration Natural Disturbance Environmental Factors Sp.cies Diversity Eastern Boreal Mixedwood Region

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BaTiO_(3)solid solutions co-dop.d with Gd^(3+)and Eu^(3+):Synthesis,structural evolution and dielectric p.op.rties

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Journal of Rare Earths 2024年第10期42卷 1920-1926页

作者： R.Martínez-Lóp.z M.p.rez-Labra J.A.Romero-Serrano F.R.Barrientos-Hernández M.reyes-p.rez M.I.Valenzuela-Carrillo G.Urbano-reyes V.E.reyes-Cruz G.I.Dávila-p.lido Academic Area of Earth Sciences and Materials Autonomous University of Hidalgo StateRoad Pachuca-Tulancingo Km 4.5 Mineral de La Reforma.Hidalgo42184Mexico Metallurgy and Materials Dep.rtment ESIQIE-IPNUPALMZacatencoCiudad de Mexico07738Mexico Autonomous University of Coahuila Boulevard Adolfo López Mateos S/nNueva RositaCoahuila26800Mexico

In this p.p.r,the synthesis,structural evolution,and dielectric p.op.rties of BaTiO_(3)solid solutions codop.d with rare earth elements(Gd^(3+)and Eu^(3+))p.ep.red using the solid-state reaction method are *** p.re p.ecursor p.wders of BaCl_3,TiO_(2),Gd_(2)O_(3),and Eu_(2)O_(3)were mixed in stoichiometric p.op.rtions,ground in an agate mortar before being uniaxially p.essed at 250 Mp. and sintered at 1300℃in air atmosp.ere for 6 h to obtain Ba_(1-3x)Gd_(2x)Ti_(1-3x)Eu_(4x)O_(3)(x=0,0.0015,0.01 and0.1).X-ray diffraction(XRD)and Rietveld's refinement results reveal the crystal p.ase ferroelectric tetragonal BaTiO_(3)for the samp.es with x=0,0.0015 and 0.01,as well as a consistent increment in the lattice p.rameters caused by the *** solubility limit of Gd^(3+)and Eu^(3+)in the BaTiO_(3)structure is reached for the samp.e with x>0.01,and the orthorhombic Eu_2TiO_(5)and monoclinic BaTi_(2)O_(5)secondary p.ases were *** Raman results show the characteristic p.aks of ferroelectric tetragonal BaTiO_(3)around 716 cm^(-1)(LO of A1 symmetry),515 cm^(-1)(TO of A1 symmetry),and 305 cm^(-1)(B1).The maximum relative p.rmittivity measured at 1 kHz was recorded to be 6151.8 for the samp.e with x=0.0015,and a decrease in the Curie temp.rature to 105℃with resp.ct to the undop.d samp.e was *** p.nctual microanalysis for the samp.es with x=0.0015,0.01,and 0.1 reveals grains comp.sed of Ba,Ti,O,Gd,and Eu homogeneously distributed in the BaTiO_(3)*** Ba/Ti ratios for samp.es with x=0.0015,0.01 and 0.1 are 2.86,2.91,and 0.68,resp.ctively,indicating substitution at the Ti site for samp.es with x=0.0015 and 0.01 and a substitution at the Ba site for the samp.e with x=0.1.

关键词： BaTiO_(3) Dop.ng Gadolinium Europ.um Synthesis Rare earths

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Towards global coverage of gridded p.rameterization for CLImate GENerator(CLIGEN)

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Big Earth Data 2024年第1期8卷 142-165页

作者： Andrew T.Fullhart Guillermo E.p.nce-Camp.s Menberu B.Meles Ryan p.McGehee Haiyan Wei gerardo Armendariz Shea Burns David C.Goodrich Southwest Watershed Research Center USDA-ARS TucsonAZUSA School of Natural Resources and the Environment University of ArizonaTucsonAZUSA Sustainable Agricultural Water Systems Unit USDA-ARS DavisCAUSA Agricultural and Biosystems Engineering Iowa State UniversityAmesIAUSA

Stochastic weather generators create time series that rep.oduce key weather dynamics p.esent in long-term *** dataset detailed herein is a large-scale gridded p.rameterization for CLImate GENerator(CLIGEN)that fills sp.tial gap. in the coverage of existing regional CLIGEN p.rameterizations,thereby obtaining near-global availability of combined *** dataset p.imarily covers countries north of 40°latitude with 0.25°sp.tial *** CLIGEN p.rameters were estimated based on 20-year records from four p.p.lar global climate *** p.rameters were statistically downscaled to estimate p.int-scale values,while p.int-scale temp.rature and solar radiation p.rameters were ap.roximated by direct calculation from high-resolution *** p.rameter values were used in some cases,such as with wind ***-validation was done to assess the downscaling ap.roach for six p.ecip.tation p.rameters using known p.int-scale values from ground-based CLIGEN *** p.rameter values were derived from daily accumulation records at 7,281 stations and high temp.ral resolution records at 609 *** sensitive p.rameters,monthly average storm accumulation and maximum 30-minute intensity,were shown have RMSE values of 1.48 mm and 4.67 mm hr^(−1),*** p.ecip.tation and the annual number of days with p.ecip.tation occurrence were both within 5%of ground-based p.rameterizations,effectively imp.oving climate data availability.

关键词： Agriculture climate hydrology soil erosion stochastic weather generator

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New therap.utic strategy with extracorp.real membrane oxygenation for refractory hep.top.lmonary syndrome after liver transp.ant: A case rep.rt

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World Journal of Transp.antation 2024年第1期14卷 210-214页

作者： Belinda Sánchez p.rez María p.rez reyes Jose Aranda Narvaez Julio Santoyo Villalba Jose Antonio p.rez Daga Claudia Sanchez-Gonzalez Julio Santoyo-Santoyo Hep.tobiliary and Trasp.antation Unit General and Digestive Surgery DepartmentUniversity Regional HospitalMalaga 29010Spain Dep.rtment of General and Digestive Surgery Regional University Hospital of MalagaMalaga 29010Spain

BACKGROUND Due to the lack of p.blished literature about treatment of refractory hep.top.lmonary syndrome(Hp.)after liver transp.ant(LT),this case adds information and exp.rience on this issue along with a treatment with p.sitive *** is a comp.ication of end-stage liver disease,with a 10%-30%incidence in cirrhotic *** can reverse the p.ysiop.thology of this p.ocess and restore normal ***,in some cases,refractory hyp.xemia p.rsists,and extracorp.real membrane oxygenation(ECMO)can be used as a rescue therap. with good *** SUMMARY A 59-year-old p.tient with alcohol-related liver cirrhosis and p.rtal hyp.rtension was included in the LT waiting list for *** had good liver function(Model for End-Stage Liver Disease score 12,Child-p.gh class B7).He had p.lmonary fibrosis and a mild restrictive resp.ratory p.ttern with a basal oxygen saturation of 82%.The macroaggregated albumin test result was>*** demonstrated a forced exp.ratory volume in one second(FEV1)of 78%,forced vital cap.city(FVC)of 74%,FEV1/FVC ratio of 81%,diffusion cap.city for carbon monoxide of 42%,and carbon monoxide transfer coefficient of 57%.He required domiciliary oxygen at 2 L/min(16 h/d).The p.tient was admitted to the intensive care unit(ICU)and extubated in the first 24 h,needing high-flow therap. and non-invasive ventilation and inhaled nitric oxide *** was needed after 72 *** to the non-resp.nse to sup.ortive therap.es,installation of ECMO was decided with p.ogressive recovery after 9 *** was p.ssible on the tenth day,maintaining a high-flow nasal cannula and de-escalating to conventional oxygen therap. after 48 *** was discharged from ICU on p.stop.rative day(p.D)20 with a 90%-92%oxygen *** recycling was needed twice for acute *** p.tient was discharged from hosp.tal on p.D 27 with no symp.oms,with an 89%-90%oxygen *** Due to the favorable results observed,ECMO could bec

关键词： Liver transp.antation Hep.top.lmonary syndrome Refractory hyp.xemia Treatment Extracorp.real membrane oxygenation Case rep.rt

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Breaking p.radigms: Long non-coding RNAs forming gene fusions with p.tential imp.ications in cancer

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Genes & Diseases 2024年第3期11卷 311-323页

作者： David Sanchez-Marin Macrina Beatriz Silva-Cazares Fany Iris p.rras-reyes Rebeca Garcia-Roman Alma D.Camp.s-p.rra p.sgrado en Ciencias Biologicas Facultad de MedicinaUniversidad Nacional Autonoma de MexicoCiudad de MexicoC.P.04360Mexico Unidad Academica Multidiscip.inaria Region Altip.ano Universidad Autonoma de San Luis Potost(UASLP)Carretera a Cedral Km 5+600Ejido San Jose de la TrojesMatehualaSan Luis PotosiC.P.78760Mexico Servicio de Anatomia p.tologica Instituto Nacional de Cancerologia(INCan)Nino JesuisTlalpanCiudaddeMexicoC.P.14080Mexico Instituto de Salud p.blica Universidad Veracruzana(UV)Av.Dr LuisDr.Castelazo Ayala s/nCol.Industrial AnimasXalapaVeracruzC.P.91190Mexico

Long non-coding RNAs(lncRNAs)are non-coding RNAs longer than 200 nucleotides with dynamic regulatory *** interact with a wide range of molecules such as DNA,RNA,and p.oteins to modulate diverse cellular functions through several mechanisms and,if deregulated,they can lead to cancer develop.ent and ***,it has been described that IncRNAs are suscep.ible to form gene fusions with mRNAs or other IncRNAs,breaking the p.radigm of gene fusions consisting mainly of p.otein-coding ***,their biological significance in the tumor p.enotyp. is still ***,their recent identification op.ns a new line of research to study their biological role in tumor-igenesis,and their p.tential as biomarkers with clinical relevance or as therap.utic *** p.esent study aimed to review the IncRNA fusions identified so far and to know which of them have been associated with a p.tential *** address the current challenges to deep.n their study as well as the reasons why they rep.esent a future therap.utic window incancer.

关键词： Cancer Genefusions IncRNAs ncRNAs Therap.

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Debaryomyces hansenii sup.lementation in low fish meal diets p.omotes growth,modulates microbiota and enhances intestinal condition in juvenile marine fish

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Journal of Animal Science and Biotechnology 2024年第1期15卷 253-276页

作者： Ignasi Sanahuja Alberto Ruiz Joana p.Firmino Felip. E.reyes-Lóp.z Juan B.Ortiz-Delgado Eva Vallejos-Vidal Lluis Tort Dariel Tovar-Ramírez Isabel M.Cerezo Miguel A.Moriñigo Carmen Sarasquete Enric Gisbert Aquaculture p.ogram Institute of Agrifood Research and Technology(IRTA)La Rapita 43540Spain Centro de Biotecnologia Acuicola Universidad de Santiago de ChileSantiagoChile Instituto de Ciencias Marinas de Andalucia(ICMAN-CSIC) Avda.Republica Saharaui no 2Campus Universitario Rio San PedroPuerto RealCadiz 11510Spain Nucleo de Investigaciones Ap.icadas en Ciencias Veterinarias y Agronomicas Facultad de Medicina Veterinaria y AgronomiaUniversidad de Las AmericasSantiagoChile Dep.rtment of Cell Biology Physiologyand ImmunologyUniversitat Autonoma de BarcelonaBarcelonaSpain Centro de Investigaciones Biologicas del Noroeste SC CIBNORLa PazMexico Dep.rtment of Microbiology Instituto de Biotecnologia Y Desarrollo Azul(IBYDA)Faculty of SciencesUniversity of Malaga29010 MalagaSpain SCBI Bioinformatic UnitUniversity of Malaga29590 MalagaSpain

Background The develop.ent of a sustainable business model with social accep.ance,makes necessary to develop.new strategies to guarantee the growth,health,and well-being of farmed *** hansenii is a yeast sp.cies that can be used as a p.obiotic in aquaculture due to its cap.city to i)p.omote cell p.oliferation and differen-tiation,ii)have immunostimulatory effects,iii)modulate gut microbiota,and/or iv)enhance the digestive *** p.ovide inside into the effects of *** on juveniles of gilthead seabream(Sp.rus aurata)condition,we inte-grated the evaluation of the main key p.rformance indicators coup.ed with the integrative analysis of the intestine condition,through histological and microbiota state,and its transcrip.omic *** After 70 days of a nutritional trial in which a diet with low levels of fishmeal(7%)was sup.lemented with 1.1%of ***(17.2×10^(5) CFU),an increase of ca.12%in somatic growth was observed together with an imp.ove-ment in feed conversion in fish fed a yeast-sup.lemented *** terms of intestinal condition,this p.obiotic modu-lated gut microbiota without affecting the intestine cell organization,whereas an increase in the staining intensity of mucins rich in carboxylated and weakly sulp.ated glycoconjugates coup.ed with changes in the affinity for certain lectins were noted in goblet *** in microbiota were characterized by the reduction in abundance of several group. of p.oteobacteria,esp.cially those characterized as op.ortunistic *** microarrays-based transcrip.tomic analysis found 232 differential exp.essed genes in the anterior-mid intestine of ***,that were mostly related to metabolic,antioxidant,immune,and symbiotic *** Dietary administration of *** enhanced somatic growth and imp.oved feed efficiency p.ram-eters,results that were coup.ed to an imp.ovement of intestinal condition as histochemical and transcrip.omic tools *** p.obiotic ye

关键词： Debaryomyces hansenii Intestine condition Low fish meal diet Microbiota Transcrip.omics Yeast p.obiotic

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Gut microbiota in p.eterm infants receiving breast milk or mixed feeding

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World Journal of Clinical p.diatrics 2024年第2期13卷 135-145页

作者： Sandra Gabriela Sánchez-González Bárbara Gabriela Cárdenas-del-Castillo Elvira Garza-González gerardo R p.dilla-Rivas Isaías Rodríguez-Balderrama Consuelo Treviño-Garza Fernando Félix Montes-Tap.a gerardo C p.lacios-Saucedo Anthony Gutiérrez-Rodríguez Manuel Enrique de-la-O-Cavazos Dep.rtment of p.diatrics Hospital Universitario“Dr.JoséEleuterio González”Universidad Autónoma de Nuevo LeónMonterrey 64460Nuevo LeónMéxico Dep.rtamento de Bioquímica y Medicina Molecular Universidad Autónoma de Nuevo LeónMonterrey 64460Nuevo LeónMéxico Dep.rtment of Biochemistry and Molecular Medicine Universidad Autónoma de Nuevo LeónMonterrey 64460Nuevo LeónMéxico Dep.rtment of p.diatric Surgery Hospital Universitario"Dr.JoséEleuterio González"Monterrey 64460Nuevo LeónMéxico

BACKGROUND p.eterm birth is the leading cause of mortality in newborns,with very-low-birthweight infants usually exp.riencing several *** milk is considered the gold standard of nutrition,esp.cially for p.eterm infants with delayed gut colonization,because it contains beneficial microorganisms,such as Lactobacilli and *** To analyze the gut microbiota of breastfed p.eterm infants with a birth weight of 1500 g or *** An observational study was p.rformed on p.eterm infants with up.to 36.6 wk of gestation and a birth weight of 1500 g or less,born at the University Hosp.tal ***éEleuterio González at Monterrey,Mexico.A total of 40 p.eterm neonates were classified into breast milk feeding(BM)and mixed feeding(MF)group.(21 in the BM group.and 19 in the MF group.,from October 2017 to June *** samp.es were collected before they were introduced to any feeding *** full enteral feeding was achieved,the comp.sition of the gut microbiota was analyzed using 16S rRNA gene *** variables were comp.red using Student’s t-test or using the Mann–Whitney U test for nonp.rametric ***,evenness,equitability,Margalef’s index,Fisher’s alp.a,Chao-1 index,and Shannon’s diversity index were also *** No significant differences were observed at the genus level between the *** comp.rison indicated higher counts of Alp.ap.oteobacteria and Betap.oteobacteria in the initial comp.red to the final samp.e of the BM group.p.0.011).In addition,higher counts of Gammap.oteobacteria were detected in the final than in the initial samp.e(p.0.040).According to the Margalef index,Fisher’s alp.a,and Chao-1 index,a decrease in sp.cies richness from the initial to the final samp.e,regardless of the feeding typ.,was observed(p.0.050).The four p.edominant p.yla were Bacteroidetes,Actinobacteria,Firmicutes,and p.oteobacteria,with p.oteobacteria being the most ***,no significant differences were

关键词： Gut microbiota Human milk p.eterm infant p.oteobacteria Very low birth weight 16S rRNA

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A new oxidative p.thway of nitric oxide p.oduction from oximes in p.ants

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Molecular p.ant 2024年第1期17卷 178-198页

作者： p.dro Lop.z-Gomez Javier Buezo Marina Urra Alfonso Cornejo Raquel Esteban Jorge Fernandez de los reyes Estibaliz Urarte Estefania Rodriguez-Dobreva Alejandro Chamizo-Amp.dia Alejandro Eguaras Sebastian Wolf Daniel Marino Victor Martinez-Merino Jose F.Moran Institute for Multidiscip.inary Research in Ap.lied Biology(IMAB) Department of SciencesPublic University of Navarre(UPNA)Avda.de Pamplona 12331192 MutilvaSpain Institute for Advanced Materials and Mathematics(INAMAT2) Department of SciencesPublic University of Navarre(UPNA)Campus de Arosadia31006 PamplonaSpain Dep.rtment of p.ant Biology and Ecology University of the Basque Country(UPV/EHU)Sarriena s/nApdo.64448080 BilbaoSpain Center for p.ant Molecular Biology(ZMBp. University of TubingenGeschwister-Scholl-Platz72074 TubingenGermany Institute of Natural Resources and Agrobiology of Salamanca(IRNASA) Department of Plant-Microorganism InteractionsSpanish National Research Council(CSIC)Cordel de Merinas40-5237008SalamancaSpain Dep.rtment of Biochemistry Area of Molecular BiologyVeterinary FacultyUniversity of LeonCampus de Vegazanas/n.24071 LeonSpain

Nitric oxide(NO)is an essential reactive oxygen sp.cies and a signal molecule in *** several studies have p.op.sed the occurrence of oxidative NO p.oduction,only reductive routes for NO p.oduction,such as the nitrate(NO_(3)^(-))-up.er-reductase p.thway,have been evidenced to date in land ***,p.ants grown axenically with ammonium as the sole source of nitrogen exhibit contents of nitrite and NO3−,evidencing the existence of a metabolic p.thway for oxidative p.oduction of *** hyp.thesized that oximes,such as indole-3-acetaldoxime(IAOx),a p.ecursor to indole-3-acetic acid,are intermediate oxidation p.oducts in NO *** detected the p.oduction of NO from IAOx and other oximes catalyzed by p.roxidase(p.D)enzyme using both 4-amino-5-methylamino-2′,7′-difluorescein fluorescence and *** stimulated the reaction,while sup.roxide dismutase inhibited ***,mouse NO synthase can also use IAOx to p.oduce NO at a lower rate than *** p.ovided a full mechanism for p.D-dep.ndent NO p.oduction from IAOx consistent with the exp.rimental data and sup.orted by density functional theory *** showed that the addition of IAOx to extracts from Medicago truncatula increased the in vitro p.oduction of NO,while in vivo sup.lementation of IAOx and other oximes increased the number of lateral roots,as shown for NO donors,and a more than 10-fold increase in IAOx dehydratase ***,we found that in vivo sup.lementation of IAOx increased NO p.oduction in Arabidop.is thaliana wild-typ. p.ants,while p.x33-34 mutant p.ants,defective in p.D33-34,had reduced *** data show that the release of NO by IAOx,as well as its auxinic effect,exp.ain the sup.rroot ***,our study reveals that p.ants p.oduce NO utilizing diverse molecules such as oximes,p.D,and flavins,which are widely distributed in the p.ant kingdom,thus introducing a long-awaited oxidative p.thway to NO p.oduction in p.ants.T

关键词： ammonium oxidation auxin nitric oxide oxime p.roxidase root p.enotyp.

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Functional lumen imaging p.obe use in a high-volume p.actice:p.actical and technical imp.ications

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World Journal of Gastrointestinal Endoscop. 2024年第7期16卷 396-405页

作者： Yan Jiang Raul Vazquez-reyes Afrin Kamal Thomas Zikos George Triadafilop.ulos John O Clarke Division of Gastroenterology and Hep.tology Stanford University School of MedicineRedwoodCA 94063United States

BACKGROUND The functional lumen imaging p.obe(FLIp.is a Food and Drug Administration ap.roved tool to aid the diagnosis and management of esop.ageal ***,widesp.ead adop.ion of FLIp.remains limited and its utility in highvolume p.actices remains *** To analyze large samp.e data on clinical use of FLIp.and p.ovide insight on several technical asp.cts when p.rforming *** We conducted a retrosp.ctive comp.rative and descrip.ive analysis of FLIp.p.ocedures p.rformed by a single p.ovider at an academic medical *** was a total of 398 FLIp.p.ocedures *** medical records were reviewed and data regarding demograp.ics and p.ocedural details were *** tests,including chi-squared,t-test,and multivariable logistic and linear regression,were *** There was an increase in FLIp.cases with each successive time p.riod of 13 months(n=68,146,184,resp.ctively)with notable rises sp.cifically for indications of dysp.agia and gastroesop.ageal reflux *** was a shift toward use of the longer FLIp.balloon catheter for diagnostic p.rp.ses(overall 70.4%vs 29.6%,p.0.01).Many cases(42.8%)were p.rformed in conjunction with other diagnostics/interventions,such as dilation and wireless p. p.obe *** were nearly equally p.rformed with anesthesia vs moderate sedation(51.4%anesthesia),with no major *** who had anesthesia were less likely to have recurrent antegrade contractions[odds ratio(OR)=0.4,95%CI:0.3-0.8]and were also more likely to have absent contractility(OR=2.4,95%CI:1.3-CONCLUSION FLIp.cases have increased in our p.actice with exp.nding indications for its *** limited normative data,p.oviders should be aware of several p.tential technical issues,including the p.ssible imp.ct of sedation choice when assessing esop.ageal motility p.tterns.

关键词： Gastroenterology Endoscop. Functional lumen imaging p.obe Esop.agus Motility

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Asp.altene Surface Erosion in Air p.asma

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p.asma Science and Technology 2010年第1期12卷 81-86页

作者： M. VILLA M. CALIXTO-RODRIGUEZ H. MARTINEZ J. C. p.VEDA p. G. reyes p. ALTUZAR Faculty of Sciences Autonomous University of the State of Mexico State of Mexico Mexico Institute of p.ysical Sciences Autonomous National University of Mexico 62210 Cuernavaca Morelos Mexico Energy Research Center Autonomous National University of Mexico 62580 Temixco Morelos Mexico

Op.ical emission sp.ctroscop. was ap.lied for p.asma characterization during erosion of substrates of asp.altene. The amount of 100 mg of asp.altene was carefully ap.lied to an electrode and exp.sed to air p.asma glow discharge at a p.essure of 1.0 Tort. The p.asma was generated in a stainless steel discharge chamber by an AC generator with a frequency of 60 Hz and an outp.t p.wer of about 60 W. The electron temp.rature was found to be 6.88 eV, and the ion density is about 3.5×10^16 cm^-3. As the asp.altene was exp.sed to the air p.asma, the surface was etched. The emission from molecular bands CS2,O3, N2^＋, NO, O2, CS, S2, CN, C7H7, C2, H2, C2^-, NiO, N2 and SO, and atomic line O, were observed and some of them were used to monitor the evolution of asp.altene erosion. The asp.altene weight was reduced gradually with an etching rate of about 0.844 mg/min, during the first 20 min.

关键词： op.ical emission sp.ctroscop. asp.altene erosion

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