Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Vinicius N. Moreira"'
Autor:
Vinicius N. Moreira, Perla Baptista de Jesus, José Carlos Sícoli Seoane, Julia Caon Araujo, Kita Macario, Fábio Ferreira Dias, Anderson dos Santos Passos
Publikováno v:
Radiocarbon. 63:1149-1163
The vermetidae fossils ofPetaloconchus varians, formed by calcium carbonate, associated with their radiocarbon ages, are the most accurate indicators of paleo sea level due to their restricted occupation in the intertidal zone in the rocky shore. How
Autor:
Maria Isabela Oliveira, Izabela Hammerschlag, Carla Roberta de Oliveira Carvalho, Maikel Diaz, Fabiana M. Oliveira, Eduardo Q. Alves, Ingrid Chanca, Kita Macario, Renata Jou, Dayanne Fernandes, Bruna M Netto, Vinicius N. Moreira, Ayrton Assumpção
Publikováno v:
Radiocarbon. 63:1233-1245
The Radiocarbon Laboratory of the Fluminense Federal University was installed in 2009, and its NEC Single Stage Accelerator Mass Spectrometry system has been operational since 2012. As the first14C-AMS facility in Latin America, the LAC-UFF became a
Autor:
Renato B. Guimarães, Katerina Douka, Perla Baptista de Jesus, Kita Macario, Fábio Ferreira Dias, Vinicius N. Moreira, Julia Caon Araujo
Publikováno v:
Radiocarbon. 62:335-348
Identifying and tackling recrystallization is a critical factor in the reliable radiocarbon (14C) dating of carbonates, since exogenous carbon can be incorporated and thus mask the real age of the samples. Vermetids are among the most important bioin
Autor:
Roberto Meigikos dos Anjos, Luiz F. Rodrigues, Adriano R. Viana, Dennis J. Miller, João Marcelo Ketzer, Vinicius N. Moreira, Marcelo Costa Muniz, Renan Pereira Cardoso, Victor Hugo Jacks Mendes dos Santos, Adolpho Herbert Augustin, Kita Macario, Anderson J. Maraschin
Publikováno v:
Radiocarbon. 62:197-206
The Rio Grande Cone is a major fanlike depositional feature in the continental slope of the Pelotas Basin, Southern Brazil. Two representative sediment cores collected in the Cone area were retrieved using a piston core device. In this work, the orga
Autor:
Eduardo Q. Alves, Ingrid Chanca, Kita Macario, Fabiana M. Oliveira, Vinicius N. Moreira, Renata M. Jou, Maikel Diaz
Publikováno v:
International Journal of Mass Spectrometry. 423:39-45
Isotopic fractionation in the graphitization reaction for Radiocarbon Accelerator Mass Spectrometry measurements was evaluated. At LAC-UFF we use the TiH2/Zn reduction method, where H2 and Zn enable the reduction of CO2 into graphite. In previous wor
Autor:
Maria Isabela Oliveira, Izabela Hammerschlag, Bruna B. Pereira, João Victor de Paiva, Lara Moreira, Vinicius N. Moreira, Kita Macario, Renata M. Jou, Ingrid Chanca, Ayrton Assumpção, Pedro Mallet, Amanda Pacheco Seixas, Carla Roberta de Oliveira Carvalho, Eduardo Q. Alves, Fabiana M. Oliveira, Fábio Lopes, Bruna M Netto, Loise Lima, Luana Cunha
Publikováno v:
International Journal of Mass Spectrometry. 410:47-51
In a previous work, isotopic fractionation in the graphitization reaction for Radiocarbon Accelerator Mass Spectrometry ( 14 C-AMS) was evaluated for amounts of Zn ranging from 20 to 50 mg. The results have shown that a slightly lower variation in δ
Autor:
Paulo R.S. Gomes, Lara Moreira, Maikel Diaz, Loise Lima, Fabiana M. Oliveira, Luana Cunha, Renata M. Jou, Bruna B. Pereira, Ingrid Chanca, João Vitor P Malafaia, Eduardo Q. Alves, Fábio Lopes, Vinicius N. Moreira, Kita Macario, Ayrton Assumpção, Pedro Mallet, Izabela Hammerschlag, Amanda Pacheco Seixas, Bruna M Netto, Maria Isabela Oliveira, Carla Roberta de Oliveira Carvalho
Publikováno v:
Radiocarbon. 59:885-891
The Radiocarbon Laboratory of the Universidade Federal Fluminense, in Brazil, has been successfully applying the zinc reduction method for graphitization of carbon samples since the development of its early protocols in 2009. Successive methodologica
Autor:
Roberto Linares, Carla Roberta de Oliveira Carvalho, Maria Isabela Oliveira, Roberto Meigikos dos Anjos, Kita Macario, A.N. Marques, Paulo R.S. Gomes, Eduardo Q. Alves, Luiz F. Rodrigues, Guaciara M. Santos, M.D. Castro, Renata M. Jou, Vinicius N. Moreira, Xiaomei Xu, Marcelo Costa Muniz, Fabiana M. Oliveira, Bruna B. Pereira, Leandro Candeia dos Anjos, Ingrid Chanca
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 361:402-405
In this paper, we summarize the sample preparation methods currently used at the Radiocarbon Laboratory of the Universidade Federal Fluminense (LAC-UFF) in Brazil. We also report on a series of results with regards to the graphitization protocol. Tes
Autor:
Vinícius R. Campos, Carla Santos de Sousa, Caroline F. J. Franco, Flaviana R. F. Dias, Jackson A. L. C. Resende, David R. da Rocha, Vinicius N. Moreira, Wanderson A. da Silva, Vitor F. Ferreira, Patricia Dias Fernandes, Raquel Carvalho Montenegro, Fernanda da C. S. Boechat, Anna C. Cunha, Maria Cecília B. V. de Souza
Publikováno v:
Repositório Institucional da Universidade Federal do Ceará (UFC)
Universidade Federal do Ceará (UFC)
instacron:UFC
Universidade Federal do Ceará (UFC)
instacron:UFC
A novel series of carbohydrate-based naphthoquinones was synthesized and evaluated for cytotoxicity against different cancer cell lines. The compounds derived from 5-hydroxy-1,4-naphthoquinone (juglone) showed better cytotoxicity profiles against HCT
Autor:
Vitor F. Ferreira, and Anna C. Cunha, Vinicius N. Moreira, Jackson Antônio L. C. Resende, Wanderson A. da Silva, Vinícius R. Campos, David R. da Rocha, Raquel Carvalho Montenegro, Maria Cecília B. V. de Souza
Publikováno v:
Proceedings of the 15th Brazilian Meeting on Organic Synthesis Proceedings.
Juglone (3) is a natural compound isolated from nogueira plants (Juglans nigra) which has shown important cytotoxic activity 1 .Quinones fused to Nheterocyclic aromatic rings have been reported in the literature 2 as potential anticancer agents. On t