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Regeneration of critical-sized defects, in a goat model, using a dextrin-based hydrogel associated with granular synthetic bone substitute

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Regenerative Biomaterials 2021年第1期8卷 73-82页

作者： Isabel Pereira Jose Eduardo Pereira Luis Maltez Alexandra Rodrigues Catarina Rodrigues Manuela Oliveira Dina MSilva ana Rita Caseiro Justina Prada ana colette mauricio Jose Domingos Santos Miguel Gama CEB Centre of Biological EngineeingUniversity of MinhoCampus de GualtarBraga 4710-057Portugal CECAV Animal and Veterinary Research CentreUniversity of Trias-os-Montes e Alto DouroVila Real 5001-801Portugal Department of Veterinary Sciences University of Tras-os-Montes e Alto DouroVila Real 5001-801Portugal Bios ckin Molecular and Cell Therapies S.A.Laboratorio CriovidaTecMaiaRua Engenheiro Frederico Ulrich 2650Moreira da Maia 4470-605Portugal Departamento de Clinicas Veterinarias Instituto de Ciencias Biomedicas de Abel Salazar(ICBAS)Universidade do Porto(UP)Rua de Jorge Viterbo Ferreiran°228Porto 4050-313Portugal Centro de Estudos de Ciencia Animal(CECA) Instituto de CienciasTecnologias e Agroambiente da Universidade do Porto(ICETA)Rua D.Manuel IApartado 55142Porto 4051-401 Portugal Centro de Investigaqao Vasco da Gama(CIVG)/Escola Universitaria Vasco da Gama(EUVG) Avenida Jose R.Sousa Femandesn°197 LordemaoCoimbra 3020-210Portugal REQUIMTE/LAQV Departamento de Engenharia Metalurgica e MateriaisFaculdade de EngenhariaUniversidade do PortoRua Dr Roberto FriasPorto 4200-495Portugal

The development of injectable bone substitutes(IBS)have obtained great importance in the bone re-generation field,as a strategy to reach hardly accessible defects using minimally invasive techniques and able to fit to irregular *** this scenario,the association of injectable hydrogels and bone graft granules is emerging as a well-established ***,in situ forming hydrogels have arisen as a new IBS *** in situ forming and injectable dextrin-based hydrogel(HG)was developed,aiming to act as a carrier of granular bone substitutes and bioactive *** this work,the HG was associated to a granular bone substitute(Bonelike)and implanted in goat critical-sized calvarial defects(14mm)for 3,6 and *** results showed that HG improved the han-dling properties of the Bonelike granules and did not affect its osteoconductive features,neither impairing the bone regener ation *** multipotent mesenchymal stromal cells from the umbilical cord,extracellular matrix hydrolysates and the pro-angiogenic peptide LLKKK18 were also combined with the *** bioactive agents did not enhance the new bone formation significantly under the conditions tested,according to micro-computed tomography and histological analysis.

关键词： polysaccharide injec table hydrogel granular ceramics Bonelike' bone regen eration calvarial defect

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Effect of Aspergillus niger prolyl endopeptidase in patients with celiac disease on a long-term gluten-free diet

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World Journal of Gastroenterology 2024年第11期30卷 1545-1555页

作者： Juan Pablo Stefanolo Verónica Segura Martina Grizzuti Abel Heredia Isabel Comino ana Florencia Costa Roberto Puebla María Paz Temprano Sonia Isabel Niveloni Gabriel de Diego María E Oregui Edgardo Gustavo Smecuol mauricio C de Marzi Elena F Verdú Carolina Sousa Julio César Bai Small Bowel Section Department of MedicineGastroenterology Hospital of Buenos Aires“Dr.C.Bonorino Udaondo”Buenos Aires 1264Argentina Department of Microbiology and Parasitology Faculty of PharmacyUniversity of SevilleSeville 41080Spain Department of Medicine Dr.C.Bonorino Udaondo Gastroenterology HospitalBuenos Aires 1264Argentina Basic and Applied Research Group in Immunology and Bioactives(GIBAIB) Institute of Ecology and Sustainable Development(INEDES)National University of LujanLuján 6700Buenos AiresArgentina Department of Medicine Farncombe Family Digestive Health Research InstituteMcMaster UniversityHamilton L8S 4L8OntarioCanada Facultad de Medicina Universidad del SalvadorBuenos Aires C1051ABBArgentina

BACKGROUND The gluten-free diet(GFD)has limitations,and there is intense research in the development of adjuvant *** To examine the effects of orally administered Aspergillus niger prolyl endopeptidase protease(AN-PEP)on inadvertent gluten exposure and symptom prevention in adult celiac disease(CeD)patients following their usual *** This was an exploratory,double-blind,randomized,placebo-controlled trial that enrolled CeD patients on a long-term *** a 4-wk run-in period,patients were randomized to 4 wk of two AN-PEP capsules(GliadinX;AVI Research,LLC,United States)at each of three meals per day or *** endpoints were:(1)Average weekly stool gluten immunogenic peptides(GIP)between the run-in and end of treatments and between AN-PEP and placebo;(2)celiac symptom index(CSI);(3)CeD-specific serology;and(4)quality of *** samples were collected for GIP testing by ELISA every Tuesday and Friday during run-ins and *** Forty patients were randomized for the intention-to-treat analysis,and three were excluded from the per-protocol ***,628/640(98.1%)stool samples were *** was undetectable(0.32μg/g)to potentially cause mucosal *** GIP concentration in the AN-PEP arm was 44.7%lower than in the run-in ***-third of patients exhibiting GIP>0.08μg/g during run-in had lower or undetectable GIP after AN-PEP *** with the run-in period,the proportion of symptomatic patients(CSI>38)in the AN-PEP arm was significantly lower(P<0.03).AN-PEP did not result in changes in specific *** This exploratory study conducted in a real-life setting revealed high adherence to the *** AN-PEP treatment did not significantly reduce the overall GIP stool ***,given the observation of a significantly lower prevale

关键词： Celiac disease Aspergillus niger prolyl endoprotease Gluten immunogenic peptides Trial Symptoms Real-life trial

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A rare pigmented keratitis caused by Aspergillus fumigatus

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International Journal of Ophthalmology(English edition) 2015年第1期8卷 208-210页

作者： mauricio Vélez Kepa Balparda ana María Díaz Universidad Pontificia Bolivariana

Dear Sir,I am mauricio Vélez,from the Department of Ophthalmology,Cornea Service Director,Universidad Pontificia Bolivariana in Medellín,***,I would like to share an interesting case I managed recently,which I’ve entitled"A rare pigmented keratitis caused by Aspergillus fumigatus".Fungi are a relatively uncommon cause of microbial keratitis

关键词： A rare pigmented keratitis caused by Aspergillus fumigatus

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Temporal pattern of humoral immune response in mild cases of COVID-19

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World Journal of Biological Chemistry 2023年第2期14卷 40-51页

作者： Isadora Maria Pilati Campos Milena Marques Gabrielle Caroline Peiter ana Paula Carneiro Brandalize mauricio Bedim dos Santos Fabrício Freire de Melo Kádima Nayara Teixeira Campus Toledo Universidade Federal do ParanáToledo 85.919-899ParanáBrazil Setor Palotina Universidade Federal do ParanáPalotina 85.950-000ParanáBrazil Campus Anísio Teixeira Universidade Federal da BahiaVitória da Conquista 45029-094BahiaBrazil

BACKGROUND Understanding the humoral response pattern of coronavirus disease 2019(COVID-19)is one of the essential factors to better characterize the immune memory of patients,which allows understanding the temporality of reinfection,provides answers about the efficacy and durability of protection against severe acute respiratory syndrome coronavirus 2(SARS-CoV-2),and consequently helps in global public health and vaccination *** the patients who became infected with SARS-CoV-2,the majority who did not progress to death were those who developed the mild COVID-19,so understanding the pattern and temporality of the antibody response of these patients is certainly *** To investigate the temporal pattern of humoral response of specific immunoglobulin G(IgG)in mild cases of *** Blood samples from 191 COVID-19 real-time reverse transcriptase-polymerase chain reaction(RT-qPCR)-positive volunteers from the municipality of Toledo/Paraná/Brazil,underwent two distinct serological tests,enzyme-linked immunosorbent assay,and detection of anti-nucleocapsid *** samples and clinicoepidemiological data of the volunteers were collected between November 2020 and February *** assays were performed in duplicate and the manufacturers'recommendations were strictly *** data were statistically analyzed using multiple logistic regression;the variables were selected by applying the P<0.05 *** Serological tests to detect specific IgG were performed on serum samples from volunteers who were diagnosed as being positive by RT-qPCR for COVID-19 or had disease onset in the time interval from less than 1 mo to 7 *** time periods when the highest number of participants with detectable IgG was observed were 1,2 and 3 *** was observed that 9.42%of participants no longer had detectable IgG antibodies 1 mo only after being infected with SARS-CoV-2 and 1.57%were also IgG negative at less than 1 *** 5 mo,3.14%of volunteers were IgG n

关键词： Humoral response Immunoglobulin G antibody Immune memory Mild cases COVID-19 SARS-CoV-2 infection Serological test

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Use of hybrid chitosan membranes and human mesenchymal stem cells from the Wharton jelly of umbilical cord for promoting nerve regeneration in an axonotmesis rat model

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Neural Regeneration Research 2012年第29期7卷 2247-2258页

作者： Andrea Gärtner Tiago Pereira Maria Joāo Simōes Paulo AS Armada-da-Silva Miguel L França Rosa Sousa Simone Bompasso Stefania Raimondo Yuki Shirosaki Yuri Nakamura Satoshi Hayakawa Akiyoshi Osakah Beatriz Porto ana Lúcia Luís Artur SP Varejāo ana colette Maurício Animal Science and Study Centre/Food and Agrarian Sciences and Technologies Institute Porto University4099-003 PortoPortugal Institute of Biomedical Sciences Abel Salazar Veterinary Clinics DepartmentPorto UniversityPorto 4099-003Portugal Faculty of Human Kinetics Technical University of LisbonCruz Quebrada-Dafundo1499-002Portugal Institute of Biomedical Sciences Abel Salazar Cytogenetic DepartmentPorto UniversityPorto 4099-003Portugal Neuroscience Institute of the Cavalieri Ottolenghi Foundation Orbassano 10043TurinItaly Department of Clinical and Biological Sciences University of TurinOrbassano 10010TurinItaly Graduate School of Natural Science and Technology Okayama UniversityOkayama 700-8530Japan Faculty of Engineering Okayama UniversityOkayama 700-8530Japan Department of Veterinary Sciences Research Centre in SportsHealth and Human DevelopmentUniversity of Trás-os-Montes and Alto DouroVila Real 5001-801Portugal

Many studies have been dedicated to the development of scaffolds for improving post-traumatic nerve regeneration. The goal of this study was to assess the effect on nerve regeneration, associating a hybrid chitosan membrane with non-differentiated human mesenchymal stem cells isolated from Wharton＇s jelly of umbilical cord, in peripheral nerve reconstruction after crush injury. Chromosome analysis on human mesenchymal stem cell line from Wharton＇s jelly was carried out and no structural alterations were found in metaphase. Chitosan membranes were previously tested in vitro, to assess their ability in supporting human mesenchymal stem cell survival, expansion, and differentiation. For the in vivo testing, Sasco Sprague adult rats were divided in 4 groups of 6 or 7 animals each： Group 1, sciatic axonotmesis injury without any other intervention （Group 1-Crush）; Group 2, the axonotmesis lesion of 3 mm was infiltrated with a suspension of 1 250 -1 500 human mesenchymal stem cells （total volume of 50 pL）（Group 2-CrushCell）; Group 3, axonotmesis lesion of 3 mm was enwrapped with a chitosan type Ill membrane covered with a monolayer of non-differentiated human mesenchymal stem cells （Group 3-CrushChitlllCell） and Group 4, axonotmesis lesion of 3 mm was enwrapped with a chitosan type III membrane （Group 4-CrushChiUll）. Motor and sensory functional recovery was evaluated throughout a healing period of 12 weeks using sciatic functional index, static sciatic index, extensor postural thrust, and withdrawal reflex latency. Stereological analysis was carded out on regenerated nerve fibers. Results showed that infiltration of human mesenchymal stem cells, or the combination of chitosan membrane enwrapment and human mesenchymal stem cell enrichment after nerve crush injury provide a slight advantage to post-traumatic nerve regeneration. Results obtained with chitosan type III membrane alone confirmed that they significantly improve post-traumatic axonal regrowth and may represent

关键词： stem cells mesenchymal stem cells Wharton jelly umbilical cord biomaterials chitosan axonotmesis functional analysis rat karyotype analysis stereological analysis

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Evaluation of Early Action Mechanisms in Peru Regarding Preparedness for El Nino

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International Journal of Disaster Risk Science 2019年第4期10卷 493-510页

作者： Julio Aguirre Daniel De La Torre Ugarte Juan Bazo Paulo Quequezana mauricio Collado Department of Economics Universidad del Pacifico15072 LimaPeru Red Cross Red Crescent Climate Centre 2502 KC The HagueThe Netherlands Centro de Investigacion de Riesgo Resiliencia y Cambio Climatico(CIRCA)Universidad Tecnologica del Peru(UTP)15046 LimaPeru

In this article,we provide an impact evaluation of an intervention in Peru regarding preparedness for El Nino impacts in Picsi District of Chiclayo Province in Peru’s northwestern coastal Lambayeque *** effort involved the provision of special kits that reduce the potential damage to homes as a consequence of rainfall and floods associated with an El Nino-Southern Oscillation *** was collected in 2016 when this Forecast-based Financing early action was activated by an El Nino forecast,and after a coastal El Nino actually struck in *** dual database permits us to estimate the impact of the intervention on the damage level of homes by comparing those homes supported by the program with those homes not receiving pilot-program *** comparison is achieved by using propensity score matching techniques,which identify the most comparable homes to the ones that were supported by the *** main findings of the study suggest a positive impact of the program in terms of its effectiveness in mitigating the damage caused by the 2017 El Ni?*** results suggest a drop in the scale of house damage(less damage)by around 63%for a home that received the modular kit *** considering other specifications of the model,the decrease in the scale of house damage improves up to approximately 66%.

关键词： Early warning Early action El NinoSouthern Oscillation Forecast-based Financing Matching propensity score Perú Red Cross

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Risk analysis： A Methodology Applicable to the Building Inspection

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Journal of Civil Engineering and Architecture 2016年第9期10卷 1052-1058页

作者： mauricio Noya ana Lucia Torres Seroa da Motta Mariangela Moura Rafael Carvalho de Souza Bruno Barzellay Programa de Pos-graduacao em Engenharia Civil Universidade Federal Fluminense Rio de Janeiro 22211-200 Brazil Departamento de Engenharia Civil da Universidade Federal do Rio de Janeiro-Campus Macae Rio de Janeiro 22211-200 Brasil

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Effect of partial depletion of CD25+ T cells on neurological deficit and tissue damage in acute cerebral ischemia rat models

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Journal of Acute Disease 2018年第6期7卷 247-253页

作者： ana L Rodríguez-Perea Johanna Gutierrez-Vargas mauricio Rojas Gloria P Cardona-Gómez Paula A Velilla Grupo Inmunovirologia Facultad de MedicinaUniversidad de Antioquia UdeACalle70No.52-21MedellínColombia Bacterias&Cáncer Facultad de MedicinaUniversidad de Antioquia UdeACalle70No.52-21MedellínColombia Facultad de Ciencias de la Salud Corporación Universitaria RemingtonUniremingtonCalle51No.51-27MedellínColombia Grupo de Inmunología Celular e Inmunogenética(GICIG).Instituto de Investigaciones Médicas Facultad de MedicinaUniversidad de Antioquia UdeACalle70No52-21MedellínColombia Unidad de Citometría Facultad de MedicinaSede de Investigación UniversitariaUniversidad de Antioquia UdeACalle70No52-21MedellínColombia Grupo de Neurociencias de Antioquia Facultad de MedicinaSede de Investigación UniversitariaUniversidad de Antioquia UdeACalle70No52-21MedellínColombia

Objective: To evaluate the role of regulatory T cells (Tregs) at late stages of stroke. Methods:Anti-CD25 antibody (or PBS as a control) was injected to reduce the pool of Tregs in Wistar rats;then, ischemia was induced transiently by middle cerebral artery occlusion during 60 min and reperfusion was allowed for 7 d. Then, Treg frequency was analyzed in peripheral blood, spleen and lymph nodes. Neurological score (0-6) and infarct volume were also determined. Results: Nine days after injection, the CD4+CD25+ T cells were reduced by 70.4%, 44.8% and 57.9% in peripheral blood, spleen and lymph nodes, respectively compared to PBS-treated rats. In contrast, the reduction of CD4+FOXP3+ T cells was lower in the same compartments (38.6%, 12.5%, and 29.5%, respectively). The strongest reduction of CD25+CD4+ T cells was observed in those FOXP3-negative cells in blood, spleen and lymph nodes (77.8%, 52.8%, and 60.7%, respectively), most likely corresponding to activated T cells. Anti-CD25-treated transient middle cerebral artery occlusion rats had a lower neurological deficit and did not develop tissue damage compared with PBS-treated animals. Conclusions: These findings suggest that treatment with anti-CD25 in our model preferentially reduce the T cell population with an activated phenotype, rather than the Treg population, leading to neuroprotection by suppressing the pathogenic response of effector T cells.

关键词： Transitory middle cerebral artery occlusion Rat Anti-CD25 Regulatory T cells Ischemia Activated T-lymphocytes

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Evaluation of biodegradable electric conductive tube-guides and mesenchymal stem cells

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World Journal of Stem Cells 2015年第6期7卷 956-975页

作者： Jorge Ribeiro Tiago Pereira ana Rita Caseiro Paulo Armada-da-Silva Isabel Pires Justina Prada Irina Amorim Sandra Amado Miguel Franca Carolina Goncalves Maria Ascensao Lopes Jose Domingos Santos Dina Morais Silva Stefano Geuna ana Lúcia Luís ana colette Maurício Departmento de Clínicas Veterinárias and+UPVet Instituto de Ciencias Biomedicas de Abel Salazar(ICBAS)and Centro de Estudos de Ciencia Animal(CECA)Instituto de CienciasTecnologias e Agroambiente da Universidade do Porto(ICETA)Rua de Jorge Viterbo Ferreira4050-313 PortoPortugal Centro Interdisciplinar de Estudo de Performance Humana(CIPER) Faculdade de Motricidade Humana(FMH)Universidade de Lisboa(UL)Estrada da Costa1499-002 Cruz QuebradaDafundoPortugal CECAV and Departamento de Ciencias Veterinárias Universidade de Trás-os-Montes e Alto Douro(UTAD)5001-801 Vila RealPortugal Departmento de Patologia e de Imunologia Molecular Instituto de Ciencias Biomedicas de Abel SalazarRua de Jorge Viterbo Ferreira4050-313 PortoPortugal Instituto Português de Patologia e Imunologia Molecular da Universidade do Porto(IPATIMUP) Rua Dr.Roberto Frias s/n4200-465 PortoPortugal UIS-IPL:Unidade de Investigacao em Saúde da Escola Superior de Saúde de Leiria Instituto Politécnico de Leiria2411-901 LeiriaPortugal CEMUC Departamento de Engenharia Metalúrgica e MateriaisFaculdade de Engenharia da Universidade do Porto(FEUP)Rua Dr.Roberto Frias4200-465 PortoPortugal Biosckin Molecular and Cell Therapies S.A.Tec MaiaRua Engenheiro Frederico Ulrich 26504470-605 MaiaPortugal Neuroscience Institute of the Cavalieri Ottolenghi Foundation and Department of Clinical and Biological Sciences University of Turin

AIM: To study the therapeutic effect of three tubeguides with electrical conductivity associated to mesenchymal stem cells(MSCs) on neuro-muscular regeneration after ***: Rats with 10-mm gap nerve injury were tested using polyvinyl alcohol(PVA), PVA-carbon nanotubes(CNTs) and MSCs, and PVA-polypyrrole(PPy). The regenerated nerves and tibialis anterior muscles were processed for stereological studies after 20 wk. The functional recovery was assessed serially for gait biomechanical analysis, by extensor postural thrust, sciatic functional index and static sciatic functionalindex(SSI), and by withdrawal reflex latency(WRL). In vitro studies included cytocompatibility, flow cytometry, reverse transcriptase polymerase chain reaction and karyotype analysis of the MSCs. Histopathology of lung, liver, kidneys, and regional lymph nodes ensured the biomaterials biocompatibility. RESULTS: SSI remained negative throughout and independently from treatment. Differences between treted groups in the severity of changes in WRL existed, showing a faster regeneration for PVA-CNTs-MSCs(P analysis disclosed a significantly(P analysis revealed positive synergistic effects brought by MSCs and PVA-CNTs. The PVA-CNTs and PVA-PPy are promising scaffolds with electric conductive properties, bio- and cytocompatible th

关键词： Nerve regeneration Neurotmesis Tubeguides Mesenchymal stem cells Carbon nanotubes Functional assessment Gait biomechanical analysis Histomorfometry Polyvinyl alcohol

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基于超强拉曼增强金纳米粒子修饰的过渡金属双硫属化合物纳米片的分子检测（英文）

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分析科学学报 2019年第6期35卷 811-816页

作者： Jason D Orlando Ethan Kahn Cindy Y Wong Yin-ting Yeh Tej B Limbu Basant Chitara ana L Elias mauricio Terrones 鄢非 Department of Chemistry and Biochemistry North Carolina Central UniversityDurhamNC.27707USA Department of Materials Science and Engineering The Pennsylvania State UniversityUniversity ParkPA.16802USA School for Engineering of Matter Transport and EnergyArizona State UniversityTempeAZ.85287USA Department of Physics The Pennsylvania State UniversityUniversity ParkPA.16802USA Center for Nanoscale Science The Pennsylvania State UniversityUniversity ParkPA.16802USA

本文报道用不同尺寸的金纳米粒子(AuNPs)来修饰单层WS2和MoS2纳米片,通过表面增强拉曼散射(SERS)技术检测微量的罗丹明6G染料,并对比了它们在不同波长的激光激发下的等离子体特性。AuNPs在WS2和MoS2纳米片上的均匀沉积是通过种子介导的... 详细信息

本文报道用不同尺寸的金纳米粒子(AuNPs)来修饰单层WS2和MoS2纳米片,通过表面增强拉曼散射(SERS)技术检测微量的罗丹明6G染料,并对比了它们在不同波长的激光激发下的等离子体特性。AuNPs在WS2和MoS2纳米片上的均匀沉积是通过种子介导的生长方法还原HAuCl4来实现的。我们进一步使用扫描电子显微镜和拉曼光谱对所制备的异质结构进行了表征。几种优化结构的拉曼增强因子接近108,几乎达到检测单分子需要的灵敏度。我们的研究结果表明,通过贵金属纳米粒子对超薄过渡金属双硫属元素化合物进行可控修饰是完全可行的。这个策略也适合于制备高效且灵活的基底,用在新一代基于表面增强拉曼散射的化学传感器和生物传感器上。Jason D Orlando 1,Ethan Kahn 2,Cindy Y Wong 3,Yin-ting Yeh 4,5,Tej B Limbu 1,Basant Chitara 1,ana L Elias 4,5,mauricio Terrones 4,5,YAN Fei(*** of Chemistry and Biochemistry,North Carolina Central University,Durham,NC.27707,USA;*** of Materials Science and Engineering,The Pennsylvania State University,University Park,PA.16802,USA;*** for Engineering of Matter,Transport and Energy,Arizona State University,Tempe,AZ.85287,USA;*** of Physics,The Pennsylvania State University,University Park,PA.16802,USA;*** for Nanoscale Science,The Pennsylvania State University,University Park,PA.16802,USA)

关键词：过渡金属双硫属元素化合物表面增强拉曼散射罗丹明6G 金纳米颗粒

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