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2. Determining ecosystem functioning in Brazilian biomes through foliar carbon and nitrogen concentrations and stable isotope ratios

Author

Martinelli, L. A., Nardoto, G. B., Soltangheisi, A., Reis, C. R. G., Abdalla-Filho, A. L., Camargo, P. B., Domingues, T. F., Faria, D., Figueira, A. M., Gomes, T. F., Lins, S. R. M., Mardegan, S. F., Mariano, E., Miatto, R. C., Moraes, R., Moreira, M. Z., Oliveira, R. S., Ometto, J. P. H. B., Santos, F. L. S., Sena-Souza, J., Silva, D. M. L., Silva, J. C. S. S., and Vieira, S. A.

Published
2021
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12. Superconducting nanobridges under magnetic fields

Author

Rodrigo, J. G., Suderow, H., and Vieira, S.

Subjects
Condensed Matter - Superconductivity, Condensed Matter - Mesoscale and Nanoscale Physics
Abstract

We report on the study of superconducting nanotips and nanobridges of lead with a Scanning Tunnelling Microscope in tunnel and point contact regimes. We deal with three different structures. A nanotip that remains superconducting under a field of 2 T. For this case we present model calculations of the order parameter, which are in good agreement with the experiments. An asymmetric nanobridge of lead showing a two steps loss of the Andreev excess current due to different heating and dissipation phenomena in each side of the structure. A study of the effect of the thermal fluctuations on the Josephson coupling between the two sides of a superconducting nanobridge submitted to magnetic fields. The different experiments were made under magnetic fields up to twenty five times the volume critical field of lead, and in a temperature range between 0.6 K and 7.2 K., Comment: 17 pages, 7 figures

Published
2003
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13. The epidemiology of sepsis in Brazilian intensive care units (the Sepsis PREvalence Assessment Database, SPREAD): an observational study

Author

Zajac, S R, Bley, M V, Scazufca, A, Rosateli, P, Reis, T, Junior, A Nogueira, Neto, P A Nunes, Filho, I L S, Lima, H, Vieira, M, Zanchet, M, Ferreira, I, Miguita, R, Petisco, G M, Westphal, G A, Santos, J R P, Damasceno, V, dos Santos, J T, Fernandes, F, Almeida, EP, Lemos, M, Lima, M F A, Camacho, R, Ribeiro, A, Douglas, M O G, Mattei, G A, Junior, E A, Ferreira, P, Rabelo, H R M P, Pinto, S P S, Fontes, L E, Machado, D, Guitzel, M, Lucio, M, Conceição, C N P, Barros, A, Salgado, D, Veiga, V C, Rojas, S S O, de Paula, KM, Hatum, R, Fraenkel, L, Viana, W N, Santos, A P G, Rabello, L, Tanaka, L, Uchoa, M, Moura, M D, Gneco, H, Buarque, M F, Monteiro, K, Nassar, A P, Jr, Koterba, E, Teixeira, M J, Falcão, A L E, Pinto, V G S, Junior, J M M, Gut, A L, Stefano, L M, Damasceno, M, Lontra, M V, Cozzani, C, Sobrinho, E B, Lage, S G, Kopel, L, Youssef, N C M, Sanches, L C, Amendola, C P, Kmohan, C, Silva, C B, Schifelbain, L, Bellotto, E, Viecili, P, Azevedo, L, Monteiro, L, Vieira, S, Abrão, A M, Moraes, A P, Insaurrale, H, Gadelha, M, Marisa, D, Diniz, R N, Romano, E R, Luzzi, S, Rezende, E, Filho, M C, Martins, R H F C, Carvalho, F B, Moreira, G C, Paula, J, Haag, F, Jr, Lucena, FS, Machado, R S, Filho, W O, Cavalcante, L O, Filho, H Carvalho, Lima, G S, Trombka, J N, Machado, E C, Bainy, M P, Ramos, C H, Hoppe, C, Luckmeyer, G D, Vogas, C, Thompson, M M, Sousa, R K, Fernandes, R, Lourenço, E, Peixoto, G L, Mocelin, A, Silva, M M L, Neto, J S A, Villela, C, Mendonça, S L, Prado, S C, Goulart, R, Duarte, J J L, Junior, H A O, Andrade, J N, Souza, L F, Fernandes, L, Neto, M L, Fernandes, S S, Amâncio, F, Versiani, J C, Pitanga, F, Alcantara, M B, Reiff, C C, Rosenblat, R, Nobrega, M S, Nobrega, M L F S, Costa, G, Assunção, N, Almeida, E P, Neder, L, Almeida, R, Fuck, J, Souza, R M, Ribeiro, A G, Alves, A A G, Carvalho, S H C, Arbex, M, Oliveira, E C, Melo, R S, Conde, K, Abreu, N Q, Melo, C L T, Carvalho, A A, Lannes, R, Missaka, H, Furtado, A H, Jr, Peixoto, A A, Jr, Maia, I, Pincelli, M P, Yunes, M P, Pessoa, A N, Figueiredo, S, Botoni, F A, Cunha, C T, Olson, F A, Franco, R, Bemfica, A F, Junior, A D F, Ferreira, E L A, Messeder, O, Passos, R, Lira, J A, Vilela, C A, Junior, S M D, Ferreira, C S, Muller, O P J A, dos Santos, R Perreira, Rubini, P, Monteiro, D, Rodrigues, L E, Ruivo, G F, Gomes, M C, Egito, E, Assef, M G, Lima, M A M, Borges, A F, Jezler, S, Mendes, C, Gottardo, P C, Lima, R, Filho, C M F, Campagnucci, V P, Solino, I, Lorca, A P, Rodrigues, G M, Gerent, K B, Barbosa, O, Filho, G T Henriques, Troncoso, E, Ventura, A, Silva, M A, Houly, J G, Pimentel, J P M, Ramos, R A, Gianini, F, Casemiro, B, Pinto, E M, Silva, G A, Sebold, M, Vieira, E, Ferreira, R, Gomes, L A, Lovato, W J, Dantas, W, Ishy, L, Moreira, J, Gagliardi, I, Goes, L O, Vendrame, L S, Guimarães, H P, Gois, A, Machado, F R, Rodrigues, M, Jr, Vieira, P C B, Bittencourt, W, Melnick, E, Schneider, M, Rezegue, L, Nogueira, N J M, Godinho, E P, Mazza, B F, Paciencia, L E, Ferraz, S, Imamura, C R A, Tavares, J, Santos, J C, Vale, E, Filho, J Mugait, Tannous, L A, João, P G D, Geral, C T I, Matera, A P, Matsui, M, Neto, E Eberhart, Pinheiro, B V, Carvalho, E V, Matos, H, Lippi, M, Campos, A L, Albuquerque, D C, Castiglioni, D, Silva, G S, Cunha, S, Novello, E, Silva, M E B, Grion, C, Festti, J, Souza, C R A, Mecatti, G C, Junqueira, E B, Dutra, R S, Mirachi, G B, Mendes, D A, Moura, E M F, Silva, I F, Mota, M G P, Carneiro, T, Celso, A, Réa-Neto, A, Oliveira, M C, Japiassú, A, Castro, P P, Costa, H J M, Rolim, A V, Rocha, D, Righy, C, Santos, V, Fernandino, B, Pereira, A L, Rego, V L D, Melo, L A, Guilherme, L, Ferro, H Chagas, Silva, F J L, Carrasco, H V C J, El-Fakouri, S, Alvarez, J, de Castro, D, Shiavetto, P M, Gallate, S R, Filho, E Thomé, Veneziano, S G, Antoniazzi, P, Filho, W H, Sadala, P, Balbino, C, Moreno, G, Dias, M S F, Lopez, R P, Rodrigues, M L, Terceiro, J, Serpa, M F, Santos, L, Lippi, M M, Machado, Flavia R, Cavalcanti, Alexandre Biasi, Bozza, Fernando Augusto, Ferreira, Elaine M, Angotti Carrara, Fernanda Sousa, Sousa, Juliana Lubarino, Caixeta, Noemi, Salomao, Reinaldo, Angus, Derek C, and Pontes Azevedo, Luciano Cesar

Published
2017
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22. Persistent currents, revival time and effects of rotation on an attractive inverse-square-type potential in a magnetic quadrupole moment system.

Author

Vieira, S. L. R. and Bakke, K.

Subjects
*QUADRUPOLE moments, *MAGNETIC moments, *ROTATIONAL motion, *MAGNETIC particles, *BOUND states, *TRANSCRANIAL magnetic stimulation
Abstract

We study the appearance of an Aharonov–Bohm-type effect around a cylindrical cavity in a magnetic quadrupole moment system in a rotating reference frame. The analogue of the Aharonov–Bohm-type effect of bound states arises from the interaction of the magnetic quadrupole moment of a neutral particle with an induced electric field when the neutral particle is subject to an attractive inverse-square-type potential, which in turn stems from the interaction of the magnetic quadrupole moment of a neutral particle with a magnetic field. We also discuss how the effects of rotation modify the degeneracy of the energy levels in contrast to the case of absence of rotation. Besides this, we calculate the revival time and the persistent currents. [ABSTRACT FROM AUTHOR]

Published
2023
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32. Long-term decline of the Amazon carbon sink

Author

Brienen, R. J. W., Phillips, O. L., Feldpausch, T. R., Gloor, E., Baker, T. R., Lloyd, J., Lopez-Gonzalez, G., Monteagudo-Mendoza, A., Malhi, Y., Lewis, S. L., Vásquez Martinez, R., Alexiades, M., Álvarez Dávila, E., Alvarez-Loayza, P., Andrade, A., Aragão, L. E. O. C., Araujo-Murakami, A., Arets, E. J. M. M., Arroyo, L., Aymard, G. A. C., Bánki, O. S., Baraloto, C., Barroso, J., Bonal, D., Boot, R. G. A., Camargo, J. L. C., Castilho, C. V., Chama, V., Chao, K. J., Chave, J., Comiskey, J. A., Cornejo Valverde, F., da Costa, L., de Oliveira, E. A., Di Fiore, A., Erwin, T. L., Fauset, S., Forsthofer, M., Galbraith, D. R., Grahame, E. S., Groot, N., Hérault, B., Higuchi, N., Honorio Coronado, E. N., Keeling, H., Killeen, T. J., Laurance, W. F., Laurance, S., Licona, J., Magnussen, W. E., Marimon, B. S., Marimon-Junior, B. H., Mendoza, C., Neill, D. A., Nogueira, E. M., Núñez, P., Pallqui Camacho, N. C., Parada, A., Pardo-Molina, G., Peacock, J., Peña-Claros, M., Pickavance, G. C., Pitman, N. C. A., Poorter, L., Prieto, A., Quesada, C. A., Ramírez, F., Ramírez-Angulo, H., Restrepo, Z., Roopsind, A., Rudas, A., Salomão, R. P., Schwarz, M., Silva, N., Silva-Espejo, J. E., Silveira, M., Stropp, J., Talbot, J., ter Steege, H., Teran-Aguilar, J., Terborgh, J., Thomas-Caesar, R., Toledo, M., Torello-Raventos, M., Umetsu, R. K., van der Heijden, G. M. F., van der Hout, P., Guimarães Vieira, I. C., Vieira, S. A., Vilanova, E., Vos, V. A., and Zagt, R. J.

Published
2015
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34. Erythrocyte-derived liposomes for the treatment of inflammatory diseases.

Author

Olival, A., Vieira, S. F., Gonçalves, V. M. F., Cunha, C., Tiritan, M. E., Carvalho, A., Reis, R. L., Ferreira, H., and Neves, N. M.

Subjects
*THERAPEUTICS, *ERYTHROCYTE membranes, *LIPOSOMES, *OMEGA-3 fatty acids, *ANTI-inflammatory agents
Abstract

Effective and safe therapies to counteract persistent inflammation are necessary. We developed erythrocyte-derived liposomes (EDLs) with intrinsic anti-inflammatory activity. The EDLs were prepared using lipids extracted from erythrocyte membranes, which are rich in omega-3 fatty acids with several health benefits. Diclofenac, a widely used anti-inflammatory drug, was incorporated into EDLs in relevant therapeutic concentrations. The EDLs were also functionalised with folic acid to allow their active targeting of M1 macrophages, which are key players in inflammatory processes. In the presence of lipopolysaccharide (LPS)-stimulated macrophages, empty EDLs and EDLs incorporating diclofenac were able to reduce the levels of important pro-inflammatory cytokines, namely interleukin-6 (IL-6; ≈85% and 77%, respectively) and tumour necrosis factor-alpha (TNF-α; ≈64% and 72%, respectively). Strikingly, cytocompatible concentrations of EDLs presented similar effects to dexamethasone, a potent anti-inflammatory drug, in reducing IL-6 and TNF-α concentrations, demonstrating the EDLs potential to be used as bioactive carriers in the treatment of inflammatory diseases. [ABSTRACT FROM AUTHOR]

Published
2022
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35. Chicken liver morphology as affected by feed withdrawal time and dietary aflatoxins.

Author

François, E., Vieira, S. L., Kindlein, L., Bess, F., Xavier, B., Soster, P., and Stefanello, C.

Subjects
*AFLATOXINS, *LIVER, *BROILER chickens, *MORPHOLOGY, *WEIGHT gain, *ANIMAL health
Abstract

1. An investigation was conducted on the effects of aflatoxin (AFL)-contaminated diets and feed withdrawal periods from 0 to 12 h in broiler chickens at 28 d of age. Both factors can potentially affect liver colour and can cause failure at veterinary inspection in the slaughterhouse. 2. A total of 240, one-d-old female Cobb 500 broiler chickens were fed a common corn-soy pre-starters (d 1–7) and then either a non-contaminated control (CON) or feed with 1 ppm AFL (AFL) from d 8 to 28. The inoculum of AFL had 792 ppb of aflatoxin B1, 35 ppb of aflatoxin B2 and 219 ppb of aflatoxin G1. On d 28, all broilers were weighed and euthanised for necropsy following three different feed withdrawal time periods (0, 6 or 12 h), in a 2 × 3 factorial arrangement. 3. Body weight gain, liver weight and liver fat content decreased as feed withdrawal lengthened, whereas FCR and gallbladder weight increased (P ≤ 0.05). AFL-fed birds had reduced body weight and proportion of liver fat and increased FCR, liver and gallbladder weights (P ≤ 0.05). 4. Livers from fed broilers (0 h withdrawal) showed more lightness (L*) and yellowness (b*) than livers of broilers from 6 or 12 h withdrawal (P ≤ 0.05). The L* and redness (a*) values of livers from broilers fed diets COB were lower than those from AFL fed broilers (P ≤ 0.05). 5. Prolonging pre-slaughter feed withdrawal decreased liver L*, whereas feeding AFL increased liver b*. These findings can be used to support veterinary assessment in slaughterhouses as shackled birds move on line through the inspection site. Since chicken liver is a valuable organ and an indicator of animal health, attention must be paid to these differences to ensure consumer safety. [ABSTRACT FROM AUTHOR]

Published
2022
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49. Short-term variability in the photosynthetic activity of microphyobenthos as detected by measuring rapid light curves using variable to fluorescence

Author

Serodio, J., Vieira, S., Cruz, S., and Barroso, F.

Subjects
Marine algae -- Food and nutrition, Fluorimetry -- Observations, Photosynthesis research, Biological sciences
Abstract

Short-term variability in the photosynthetic activity of microphytobenthos assemblages was studied by measuring chlorophyll fluorescence rapid light curves (RLC), using pulse amplitude modulated (PAM) fluorometry. Measurements carried out on undisturbed samples under dark-light cycles revealed large diel oscillations in both the initial slope of the RLC ([alpha]) and in the maximum relative electron transport rate ([ETR.sub.m]). Short-term variations in RLC parameters were also observed, closely following changes in incident photon irradiance (E). Increases in irradiance were followed by decreases in [alpha] and increases in [ETR.sub.m], resulting in significant correlations between the light-saturation parameter [E.sub.k] and E. These results were interpreted as resulting from the onset of reversible energy-dissipating, non-photochemical quenching mechanisms and of compensatory high light-induced activation of carbon metabolism activity. Short-term RLC variability was shown to result mainly from physiological causes and to be detectable only by using short (10-20 s) light steps during RLC construction. Dark-adapted samples kept under constant conditions exhibited apparently endogenous rhythms in RLC parameters and in the maximum quantum yield, [F.sub.v]/[F.sub.m], coincident with vertical migratory movements occurring during subjective photoperiods. These fluctuations appeared to result from the interaction between migratory rhythms and the physiological responses, and from the endogenous activation of processes affecting both the efficiency of energy transfer from light-harvesting antennae to the photosystem II (PSII) reaction centres or from non-radiative pathways ([F.sub.v]/[F.sub.m], [alpha]) and the reactions downstream of PSII ([ETR.sub.m]).

Published
2005

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