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Abstract The iAtlantic Project has established an international collaborative strategy to improve mapping and characterization of deep and open ocean ecosystems in understudied regions of the Atlantic and evaluate their health. In December 2022, the first iAtlantic expedition in the South Atlantic set off to map and explore seafloor ecosystems in the Santos Basin slope (200-1,000 m depths) in collaboration with the Petrobras ‘Santos Basin - Regional Characterization Project.’ The 17-day ‘iAtlantic_BR10-Petrobras’ cruise was conducted on board the research vessel NPqHOc Vital de Oliveira (Brazilian Navy) and performed (a) water column structure characterization, (b) seafloor morphology mapping, (c) description of benthic habitats and communities by seafloor imagery and biological/ geological sampling, and (d) ex-situ experiments to assess the functioning of sedimentary ecosystems and their responses to climate-related environmental changes. This study describes the rationale behind the iAtlantic_BR10-Petrobras cruise science plan, reports its sampling strategy and methods, and summarizes its collected data and preliminary results.

https://doi.org/10.1590/2675-2824071.23069jaap

Contextualização e complexidades temporais: um exercício a partir da narrativa jornalística
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Carvalho, Carlos Alberto

; Leal, Bruno Souza

; Jácome, Phellipy Pereira

Intercom: Revista Brasileira de Ciências da Comunicação

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aug 2021, Volume 44 N. 2 Pages 51 - 67

Abstract: Pt En Es | Text: Pt En Es | PDF: Pt | PDF: En | PDF: Es

Resumo O objetivo deste trabalho é discutir os processos de contextualização como ferramenta metodológica nas análises de narrativas jornalísticas. Nesse sentido, recupera-se, do ponto de vista teórico, uma discussão sobre o “contexto”, buscando considerar as complexas redes temporais nas relações textuais. Em seguida, propõe-se um gesto analítico a partir das diferentes formas de contextualizar uma imagem fotográfica nas páginas de um jornal impresso. Como metodologia, adotamos a seleção de uma página do jornal O Estado de S. Paulo, que contém uma fotografia vencedora do Prêmio Esso, cotejando com outras fotografias jornalísticas, investigando-as como situadas em contextos específicos, mas também como elas próprias são agentes de contextualização.

Abstract Professor at the Social Communication Department at the Federal University of Minas Gerais and Permanent Researcher in the Postgraduation Program in Communication (PPGCOM/UFMG), in the Mediatic Textualities research line. PhD in Social Communication at UFMG. He is a member of the Núcleo de Estudos Tramas Comunicacionais: Narrativa e Experiência research group. His research interests include studies on mediatic narratives, historicity of communication processes, temporality, referentiality and fiction (with journalism - in its multiple textualities - as the main object). In addition to dozens of articles in Brazilian and foreign academic journals and books, he is the author of “Fissuras no espelho realista do jornalismo: a narratividade crítica de Barcelona” (Belo Horizonte: PPGCom UFMG, 2015) e “A constituição moderna do jornalismo no Brasil” (Curitiba: Appris, 2020).

Resumen El objetivo de este trabajo es discutir los procesos de contextualización como una herramienta metodológica en el análisis de narrativas periodísticas. En este sentido, se recupera una discusión sobre el “contexto” desde el punto de vista teórico, buscando considerar las complejas redes temporales en las relaciones textuales. Luego, se propone un gesto analítico basado en las diferentes formas de contextualizar una imagen fotográfica en las páginas de un periódico impreso. Como metodología, adoptamos la selección de una página del periódico O Estado de S. Paulo, que contiene una fotografía ganadora del Premio Esso, cotejando con otras fotografías periodísticas, investigándolas como situadas en contextos específicos, pero también como agentes contextualizadores.

https://doi.org/10.1590/1809-5844202123 91 downloads

Effect of S. mutans combinations with bifidobacteria/lactobacilli on biofilm and enamel demineralization
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SANTOS, Vanessa Rodrigues dos

; VALDEZ, Remberto Marcelo Argandoña

; DANELON, Marcelle

; SOUZA, José Antonio Santos

; CAIAFFA, Karina Sampaio

; DELBEM, Alberto Carlos Botazzo

; DUQUE, Cristiane

Brazilian Oral Research

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2021, Volume 35 elocation e030

Abstract: En | Text: En | PDF: En

Abstract The present study evaluated the ability of Bifidobacterium and Lactobacillus species associated with streptococci to increase insoluble extracellular polysaccharide (EPS) production and initial caries lesion progression. Bovine enamel blocks (n = 190; 4 mm x 4 mm) were prepared, selected according to initial surface hardness (SH), and divided into two groups: a) double combinations: S. mutans with Bifidobacterium or Lactobacillus, and b) triple combinations: S. mutans and S. sobrinus with Bifidobacterium or Lactobacillus species. The blocks were exposed to the bacterial associations for 7 days. Subsequently, quantity of EPS from biofilms and caries lesion depth were determined by means of colorimetric and cross-sectional enamel hardness (ΔKHN) analysis. The data were submitted to one-way analysis of variance, followed by the Bonferroni test (p < 0.05). S. mutans with B. animalis or B. dentium produced a higher quantity of EPS; S. mutans + B. animalis led to the highest ∆KHN. S. mutans + S. sobrinus + B. longum induced greater EPS and ∆KHN values. In conclusion, associations of B. animalis and B. longum with streptococci promoted EPS production and caries lesion progression.

https://doi.org/10.1590/1807-3107bor-2021.vol35.0030 448 downloads

The Program for Biodiversity Research in Brazil: The role of regional networks for biodiversity knowledge, dissemination, and conservation
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ROSA, CLARISSA

; BACCARO, FABRICIO

; CRONEMBERGER, CECILIA

; HIPÓLITO, JULIANA

; BARROS, CLAUDIA FRANCA

; RODRIGUES, DOMINGOS DE JESUS

; NECKEL-OLIVEIRA, SELVINO

; OVERBECK, GERHARD E.

; DRECHSLER-SANTOS, ELISANDRO RICARDO

; ANJOS, MARCELO RODRIGUES DOS

; FERREGUETTI, ÁTILLA C.

; AKAMA, ALBERTO

; MARTINS, MARLÚCIA BONIFÁCIO

; TOMAS, WALFRIDO MORAES

; SANTOS, SANDRA APARECIDA

; FERREIRA, VANDA LÚCIA

; CUNHA, CATIA NUNES DA

; PENHA, JERRY

; PINHO, JOÃO BATISTA DE

; SALIS, SUZANA MARIA

; DORIA, CAROLINA RODRIGUES DA COSTA

; PILLAR, VALÉRIO D.

; PODGAISKI, LUCIANA R.

; MENIN, MARCELO

; BÍGIO, NARCÍSIO COSTA

; ARAGÓN, SUSAN

; MANZATTO, ANGELO GILBERTO

; VÉLEZ-MARTIN, EDUARDO

; SILVA, ANA CAROLINA BORGES LINS E

; IZZO, THIAGO JUNQUEIRA

; MORTATI, AMANDA FREDERICO

; GIACOMIN, LEANDRO LACERDA

; ALMEIDA, THAÍS ELIAS

; ANDRÉ, THIAGO

; SILVEIRA, MARIA AUREA PINHEIRO DE ALMEIDA

; SILVEIRA, ANTÔNIO LAFFAYETE PIRES DA

; MESSIAS, MARILUCE REZENDE

; MARQUES, MARCIA C.M.

; PADIAL, ANDRE ANDRIAN

; MARQUES, RENATO

; BITAR, YOUSZEF O.C.

; SILVEIRA, MARCOS

; MORATO, ELDER FERREIRA

; PAGOTTO, RUBIANI DE CÁSSIA

; STRUSSMANN, CHRISTINE

; MACHADO, RICARDO BOMFIM

; AGUIAR, LUDMILLA MOURA DE SOUZA

; FERNANDES, GERALDO WILSON

; OKI, YUMI

; NOVAIS, SAMUEL

; FERREIRA, GUILHERME BRAGA

; BARBOSA, FLÁVIA RODRIGUES

; OCHOA, ANA C.

; MANGIONE, ANTONIO M.

; GATICA, AILIN

; CARRIZO, MARÍA CELINA

; RETTA, LUCÍA MARTINEZ

; JOFRÉ, LAURA E.

; CASTILLO, LUCIANA L.

; NEME, ANDREA M.

; RUEDA, CARLA

; TOLEDO, JOSÉ JULIO DE

; GRELLE, CARLOS EDUARDO VIVEIROS

; VALE, MARIANA M.

; VIEIRA, MARCUS VINICIUS

; CERQUEIRA, RUI

; HIGASHIKAWA, EMÍLIO MANABU

; MENDONÇA, FERNANDO PEREIRA DE

; GUERREIRO, QUÊZIA LEANDRO DE MOURA

; BANHOS, AUREO

; HERO, JEAN-MARC

; KOBLITZ, RODRIGO

; COLLEVATTI, ROSANE GARCIA

; SILVEIRA, LUÍS FÁBIO

; VASCONCELOS, HERALDO L.

; VIEIRA, CECÍLIA RODRIGUES

; COLLI, GUARINO RINALDI

; CECHIN, SONIA ZANINI

; SANTOS, TIAGO GOMES DOS

; FONTANA, CARLA S.

; JARENKOW, JOÃO A.

; MALABARBA, LUIZ R.

; RUEDA, MARTA P.

; ARAUJO, PUBLIO A.

; PALOMO, LUCAS

; ITURRE, MARTA C.

; BERGALLO, HELENA GODOY

; MAGNUSSON, WILLIAM E.

Anais da Academia Brasileira de Ciências

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2021, Volume 93 N. 2 elocation e20201604

Abstract: En | Text: En | PDF: En

Abstract The Program for Biodiversity Research (PPBio) is an innovative program designed to integrate all biodiversity research stakeholders. Operating since 2004, it has installed long-term ecological research sites throughout Brazil and its logic has been applied in some other southern-hemisphere countries. The program supports all aspects of research necessary to understand biodiversity and the processes that affect it. There are presently 161 sampling sites (see some of them at Supplementary Appendix), most of which use a standardized methodology that allows comparisons across biomes and through time. To date, there are about 1200 publications associated with PPBio that cover topics ranging from natural history to genetics and species distributions. Most of the field data and metadata are available through PPBio web sites or DataONE. Metadata is available for researchers that intend to explore the different faces of Brazilian biodiversity spatio-temporal variation, as well as for managers intending to improve conservation strategies. The Program also fostered, directly and indirectly, local technical capacity building, and supported the training of hundreds of undergraduate and graduate students. The main challenge is maintaining the long-term funding necessary to understand biodiversity patterns and processes under pressure from global environmental changes.

https://doi.org/10.1590/0001-3765202120201604 1034 downloads

Persistent symptoms and decreased health-related quality of life after symptomatic pediatric COVID-19: A prospective study in a Latin American tertiary hospital
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Fink, Thais T.

; Marques, Heloisa H.S.

; Gualano, Bruno

; Lindoso, Livia

; Bain, Vera

; Astley, Camilla

; Martins, Fernanda

; Matheus, Denise

; Matsuo, Olivia M.

; Suguita, Priscila

; Trindade, Vitor

; Paula, Camila S.Y.

; Farhat, Sylvia C.L.

; Palmeira, Patricia

; Leal, Gabriela N.

; Suzuki, Lisa

; Odone Filho, Vicente

; Carneiro-Sampaio, Magda

; Duarte, Alberto José S.

; Antonangelo, Leila

; Batisttella, Linamara R.

; Polanczyk, Guilherme V.

; Pereira, Rosa Maria R.

; Carvalho, Carlos Roberto R.

; Buchpiguel, Carlos A.

; Latronico, Ana Claudia

; Seelaender, Marilia

; Silva, Clovis Artur

; Pereira, Maria Fernanda B.

; Sallum, Adriana M. E.

; Brentani, Alexandra V. M.

; Neto, Álvaro José S.

; Ihara, Amanda

; Santos, Andrea R.

; Canton, Ana Pinheiro M.

; Watanabe, Andreia

; Santos, Angélica C. dos

; Pastorino, Antonio C.

; Franco, Bernadette D. G. M.

; Caruzo, Bruna

; Ceneviva, Carina

; Martins, Carolina C. M. F.

; Prado, Danilo

; Abellan, Deipara M.

; Benatti, Fabiana B.

; Smaria, Fabiana

; Gonçalves, Fernanda T.

; Penteado, Fernando D.

; Castro, Gabriela S. F. de

; Gonçalves, Guilherme S.

; Roschel, Hamilton

; Disi, Ilana R.

; Marques, Isabela G.

; Castro, Inar A.

; Buscatti, Izabel M.

; Faiad, Jaline Z.

; Fiamoncini, Jarlei

; Rodrigues, Joaquim C.

; Carneiro, Jorge D. A.

; Paz, Jose A.

; Ferreira, Juliana C.

; Ferreira, Juliana C. O.

; Silva, Katia R.

; Bastos, Karina L. M.

; Kozu, Katia

; Cristofani, Lilian M.

; Souza, Lucas V. B.

; Campos, Lucia M. A.

; Silva Filho, Luiz Vicente R. F.

; Sapienza, Marcelo T.

; Lima, Marcos S.

; Garanito, Marlene P.

; Santos, Márcia F. A.

; Dorna, Mayra B.

; Aikawa, Nadia E.

; Litvinov, Nadia

; Sakita, Neusa K.

; Gaiolla, Paula V. V.

; Pasqualucci, Paula

; Toma, Ricardo K.

; Correa-Silva, Simone

; Sieczkowska, Sofia M.

; Imamura, Marta

; Forsait, Silvana

; Santos, Vera A.

; Zheng, Yingying

Clinics

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2021, Volume 76 elocation e3511

Abstract: En | Text: En | PDF: En

OBJECTIVES: To prospectively evaluate demographic, anthropometric and health-related quality of life (HRQoL) in pediatric patients with laboratory-confirmed coronavirus disease 2019 (COVID-19) METHODS: This was a longitudinal observational study of surviving pediatric post-COVID-19 patients (n=53) and pediatric subjects without laboratory-confirmed COVID-19 included as controls (n=52) was performed. RESULTS: The median duration between COVID-19 diagnosis (n=53) and follow-up was 4.4 months (0.8-10.7). Twenty-three of 53 (43%) patients reported at least one persistent symptom at the longitudinal follow-up visit and 12/53 (23%) had long COVID-19, with at least one symptom lasting for >12 weeks. The most frequently reported symptoms at the longitudinal follow-up visit were headache (19%), severe recurrent headache (9%), tiredness (9%), dyspnea (8%), and concentration difficulty (4%). At the longitudinal follow-up visit, the frequencies of anemia (11% versus 0%, p=0.030), lymphopenia (42% versus 18%, p=0.020), C-reactive protein level of >30 mg/L (35% versus 0%, p=0.0001), and D-dimer level of >1000 ng/mL (43% versus 6%, p=0.0004) significantly reduced compared with baseline values. Chest X-ray abnormalities (11% versus 2%, p=0.178) and cardiac alterations on echocardiogram (33% versus 22%, p=0.462) were similar at both visits. Comparison of characteristic data between patients with COVID-19 at the longitudinal follow-up visit and controls showed similar age (p=0.962), proportion of male sex (p=0.907), ethnicity (p=0.566), family minimum monthly wage (p=0.664), body mass index (p=0.601), and pediatric pre-existing chronic conditions (p=1.000). The Pediatric Quality of Live Inventory 4.0 scores, median physical score (69 [0-100] versus 81 [34-100], p=0.012), and school score (60 [15-100] versus 70 [15-95], p=0.028) were significantly lower in pediatric patients with COVID-19 at the longitudinal follow-up visit than in controls. CONCLUSIONS: Pediatric patients with COVID-19 showed a longitudinal impact on HRQoL parameters, particularly in physical/school domains, reinforcing the need for a prospective multidisciplinary approach for these patients. These data highlight the importance of closer monitoring of children and adolescents by the clinical team after COVID-19.

https://doi.org/10.6061/clinics/2021/e3511

GREEN CHEMISTRY TEACHING FOR SUSTAINABILITY IN PAPERS PUBLISHED BY THE JOURNAL OF CHEMICAL EDUCATION
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Marques, Carlos Alberto

; Marcelino, Leonardo V.

; Dias, Érica D. S.

; Rüntzel, Patricia Link

; Souza, Leila Cristina Aoyama Barbosa

; Machado, Adélio

Química Nova

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dec 2020, Volume 43 N. 10 Pages 1510 - 1521

Abstract: En | Text: En | PDF: En

This paper discusses 286 proposals and reports of Green Chemistry (GC) teaching experiences, in papers of the Journal of Chemical Education (JCEd) until 2019. The analysis was based on previous categories: source-problem, paper focus, subjects/area of knowledge, target groups, GC contents, type of approach and purpose(s) of the proposal. A list of possible characteristics of each category served as an example to compare with the information resulting from the analyses, and thus improve the discussions. In 127 papers, GC and its teaching were associated, albeit generally, with the theme of sustainability/sustainable development, which points to its potential to face environment-related aspects of chemistry in teaching. A systemic vision in the interconnection between GC and sustainability/sustainable development appeared more explicitly in 39 papers up to 2019. So far, the analysis highlights a certain reproduction of traditional chemistry teaching, and little evidence of the particularities of GC teaching. Despite the intention of inserting GC into chemistry teaching, proposals for its incorporation are often made superficially, more as an addendum or an extra quality than a specific goal. More methodological detail of the experiments carried out is needed to help in the dissemination of GC in the training curriculum of chemists. The discussions and reports on teaching approaches based on Systems Thinking showed the opening of a promising new methodological challenge within this theoretical paradigm.

https://doi.org/10.21577/0100-4042.20170612 387 downloads

Effects of silicon on biochemical and physiological aspects in Theobroma cacao under inoculation with Moniliophthora perniciosa
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Fantinato, Dayana E.

; Zanetti, Leonardo V.

; Aguilar, Marco Antonio G.

; Souza, Carlos Alberto S.

; Cuzzuol, Geraldo Rogério F.

; Gama, Vinícius N.

; Milanez, Camilla R.D.

Revista de Ciências Agrárias

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sep 2018, Volume 41 N. 3 Pages 271 - 280

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Objetivou-se avaliar a eficácia da aplicação foliar de silício nos aspectos fisiológicos e bioquímicos em um genótipo de Theobroma cacao inoculado com Moniliophthora perniciosa, fungo causador da vassoura-de-bruxa, importante doença da cacauicultura. Mudas do genótipo Catongo foram submetidas a um experimento com dois fatores (inoculação e não inoculação das plantas com M. perniciosa) cada um com dois níveis de Si (0.0 mg e 1.0 mg mL-1 de AgriSil contendo 98% de SiO2 aplicado por pulverização). Verificou-se que plantas inoculadas e submetidas à aplicação foliar com Si apresentaram aumento na fotossíntese, das atividades de peroxidases, quitinases e polifenoloxidases e da densidade estomática. Os resultados indicam que a aplicação de silício é benéfica aumentando as defesas contra Moniliphthora perniciosa em mudas de cacaueiros.

This study aimed to verify the efficiency of silicon leaf application in the physiological and biochemical characteristics in a Theobroma cacao genotype inoculated with Moniliophthora perniciosa fungus, which causes the witches’ broom disease, important cocoa disease in Brazil and worldwide. Seedlings of Catongo genotype were used. The experimental design used was a randomized block design with four replicates, including two inoculation factors (inoculated and non-inoculated plants), each one with two levels of silicon application (0.0 mg and 1.0 mg mL-1 with AgriSil containing 98% of SiO2). We observed that plants that were inoculated with M. perniciosa and subjected to leaf application with silicon presented enhanced photosynthesis, peroxidases, chitinase, polyphenoloxidases activities and stomatal density. Results have shown that silicon application is beneficial and increases the defenses against Moniliophthora perniciosa in cocoa seedlings.

https://doi.org/10.19084/RCA18064 692 downloads

3ª Diretriz Brasileira de Transplante Cardíaco
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Bacal, Fernando

; Marcondes-Braga, Fabiana G.

; Rohde, Luis Eduardo Paim

; Xavier Júnior, José Leudo

; Brito, Flávio de Souza

; Moura, Lídia Ana Zytynski

; Colafranceschi, Alexandre Siciliano

; Lavagnoli, Carlos Fernando Ramos

; Gelape, Cláudio Leo

; Almeida, Dirceu Rodrigues

; Gaiotto, Fábio Antônio

; Atik, Fernando Antibas

; Figueira, Fernando Augusto M. S.

; Souza, Germano Emílio Conceição

; Rodrigues, Hélcio

; Campos, Iáscara Wozniak

; Souza Neto, João David de

; Rossi Neto, João Manoel

; Gasparetto, Juliano

; Goldraich, Lívia Adams

; Benvenuti, Luiz Alberto

; Seguro, Luis Fernando B. C.

; Ulhôa Júnior, Marcelo Botelho

; Moreira, Maria da Consolação V.

; Ávila, Mônica Samuel

; Carneiro, Rodrigo

; Mangini, Sandrigo

; Ferreira, Sílvia Moreira Ayub

; Strabelli, Tânia Mara

Arquivos Brasileiros de Cardiologia

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aug 2018, Volume 111 N. 2 Pages 230 - 289

Abstract: Pt | Text: Pt | PDF: Pt

https://doi.org/10.5935/abc.20180153 28659 downloads

10.

PREPARAÇÃO, CARACTERIZAÇÃO FÍSICO-QUÍMICA E LIBERAÇÃO CONTROLADA DE MICROPARTÍCULAS DE GALACTOMANANA CONTENDO ALANTOÍNA
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Frota, Hilana B. M.

; Menezes, Jane Eire S. A.

; Siqueira, Sônia Maria C.

; Ricardo, Nágila Maria P.

; Araújo, Tamara G.

; Souza, Carlos Alberto G.

; Bandeira, Paulo N.

; Santos, Hélcio S. dos

Química Nova

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may 2018, Volume 41 N. 5 Pages 544 - 549

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

In this work, the allantoin was encapsulated with galactomannan extruded from Delonyx regia, by the spray drying technique. The microparticles obtained were structurally characterized by infrared spectroscopy (IR), thermal analysis, scanning electron microscopy (SEM) and the controlled release profile was evaluated. The results of IR suggested the formation of the polymeric wall of the microcapsules and SEM revealed spherical particles with an average size range of 2.84 ± 0.41 µm. X-ray diffraction showed the loss of crystallinity of the active after encapsulation and differential explanatory calorimetry exhibited the loss of its peak melt. The encapsulation efficiency for the microparticles was approximately 84% for the different environmental conditions. The coating of allantoin with the biopolymer promoted a gradual release of the drug over a period of 6 hours and these results are in accordance with the Brazilian Pharmacopoeia. The set of results obtained in this work is relevant and accredits the system developed as a possible alternative for the formation of encapsulated natural drugs destined to possible treatments of cutaneous cellular regeneration.

https://doi.org/10.21577/0100-4042.20170214 1815 downloads

11.

Sexual behavior of the digger wasp Sphex ingens Smith (Hymenoptera, Sphecidae)
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Souza, Carlos Alberto S.

; Prezoto, Fábio

; Lima, Mauro Sérgio C.S.

; Pederassi, Jonas

Revista Brasileira de Entomologia

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jun 2015, Volume 59 N. 2 Pages 107 - 112

Abstract: En | Text: En | PDF: En

A species' mating system depends on its spatial distribution and temporal availability of mating opportunities, as well as on the resources that create these opportunities. In addition, for many species, courtship is driven by specific behaviors that precede and follow copulation. Although Sphex ingens is a taxonomically well known species of digger wasp, its ecology and behavior remain poorly known. Hence, we analyzed patterns and trends of sexual behavior, in order to understand whether courtship can persist in a polygamous mating system. We monitored by video wasp populations in Ilha Grande, southeastern Brazil. Based on the observed behaviors, we calculated stochastic probabilities with a Markov chain to infer on behavioral trends. We recorded four behavioral phases based on 19,196 behavioral acts observed in 224 copulation attempts. There were no significant differences in common behavioral acts between males and females. The copulation patterns, conflicts, and trends observed in S. ingens clearly show the influence of sexual selection in its promiscuous mating system.

https://doi.org/10.1016/j.rbe.2015.03.005 1252 downloads

12.

Corrosion resistance and glass forming ability of Fe47Co7Cr15M9Si5B15Y2 (M=Mo, Nb) amorphous alloys
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Souza, Carlos Alberto Caldas de

; Bolfarini, Claudomiro

; Botta Jr., Walter José

; Lima, Luiz Rogério Pinho de Andrade

; Oliveira, Marcelo Falcão de

; Kiminami, Claudio S.

Materials Research

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dec 2013, Volume 16 N. 6 Pages 1294 - 1298

Abstract: En | Text: En | PDF: En

In the present work the effect of substituting Mo with Nb on the glass forming ability and corrosion resistance of Fe-Co-Cr-M-Si-B-Y (M=Mo, Nb) ribbons with high corrosion resistance is investigated. The X-ray powder diffraction pattern indicates that the alloy containing both Nb and Mo presented greater glass forming ability than the alloy containing either of these elements separately. The results obtained indicate that Mo is more effective in enhancing corrosion resistance than the Nb in 4.0 M HCl solution. The alloy containing both Nb and Mo presented greater overall corrosion resistance than the alloy containing only one of these elements.

1895 downloads

13.

Avaliação do pico de pressão e da frequência respiratória durante o uso de balão autoinflável por socorristas do Corpo de Bombeiros em um modelo de pulmão neonatal pré-termo
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Zaconeta, Carlos Alberto M.

; Borges, Maria Beatriz S.

; Souza, Diógenes Vilas B.

; Marques, Monique Gonçalves

Revista Paulista de Pediatria

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mar 2010, Volume 28 N. 1 Pages 5 - 9

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

OBJETIVO: Avaliar o pico de pressão inspiratória e a frequência ventilatória obtidos por socorristas do Corpo de Bombeiros com a utilização de balão autoinflável em modelo de pulmão neonatal pré-termo. MÉTODOS: Estudo observacional descritivo incluindo 31 voluntários dentre 68 socorristas convidados, componentes de duas turmas do Programa de Capacitação Continuada do Corpo de Bombeiros. Durante três minutos, os socorristas ventilaram um simulador analógico de pulmão neonatal pré-termo, utilizando balão autoinflável de tamanho neonatal. Foram captados os picos de pressão inspiratória e a frequência respiratória por meio de um pneumotacógrafo e um monitor gráfico de ventilação. Os dados eram gravados e posteriormente analisados. RESULTADOS: A média do pico de pressão foi de 14,6±8,2cmH2O, sendo menor que 20 em 77,4% das vezes, maior que 40 em 3,2% das vezes, e entre 20 e 40cmH2O em 19,4% das vezes. A média da frequência ventilatória foi de 38,3±10,3 ciclos por minuto, sendo menor que 40 em 51,6% das vezes e entre 40 e 60 ciclos por minuto em 48,4% das vezes; em nenhuma das vezes a pressão atingiu 60 ciclos por minuto. CONCLUSÕES: Os socorristas, na maioria das vezes, não atingiram o nível mínimo desejado de pressão de ventilação e frequência respiratória recomendados em protocolos internacionais durante a ventilação pulmonar neonatal com o balão autoinflável

OBJECTIVE: To evaluate the peak inspiratory pressure and the ventilation rate obtained by paramedics of the Fire Department of Brasília, Brazil, when using a neonatal self-inflating bag on a preterm lung model. METHODS: Descriptive observational study including 31 volunteers, from 68 paramedics invited, who were components of two groups of the Fire Department's Continuous Training Program. For three minutes, the paramedics ventilated an analogical simulator of preterm infant lung using a neonatal self-inflating bag. The peak inspiratory pressure and the respiratory rate were captured by a pneumotachograph and a graphical monitor of ventilation. Data were recorded and analyzed. RESULTS: Mean peak pressures in cmH2O for test lung were 14.6±8.2, being less than 20 in 77.4% of the analyzed pressure curves, more than 40 in 3.2%, and between 20 and 40cmH2O in 19.4% of the curves. Mean ventilation rates were 38.3±10.3 cycles per minute, being less than 40 in 51.6% of the analyzed pressure curves, more than 60 in zero, and between 40 and 60 in 48.4%. In no occasion the pressure reached 60 cycles per minute. CONCLUSIONS: The paramedics, most of the time, did not achieve the advised minimum level of ventilation pressure and ventilation rates recommended by international guide lines during ventilation of a neonatal lung model with a self-inflating bag

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14.

Nutrient release by a Brazilian sedimentary zeolite
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Monte, Marisa B.M.

; Middea, Antonieta

; Paiva, Paulo R.P.

; Bernardi, Alberto C.C.

; Rezende, Nélio G.A.M.

; Baptista-Filho, Milton

; Silva, Marcelo G.

; Vargas, Helion

; Amorim, Helio S.

; Souza-Barros, Fernando de

Anais da Academia Brasileira de Ciências

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dec 2009, Volume 81 N. 4 Pages 641 - 653

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

São apresentadas as propriedades físico-químicas de uma ocorrência sedimentar da Bacia do Parnaíba, Brasil, da zeólita estilbita, agregada a uma argila esmectítica. As amostras de diferentes sítios apresentam uma ampla variação do mineral zeolítico: entre 15% a 50%. A utilização de espirais concentradoras foi suficiente para obtenção de concentrados contendo até 67% do mineral. Ensaios laboratoriais do concentrado dopado com fertilizantes revelam taxas de liberação de nutrientes comparáveis aos obtidos com produtos comerciais similares.

This report describes the characterization of a sedimentary occurrence from the Parnaíba Basin, Brazil, containing the zeolite stilbite intertwined with smectitic clay mineral. The head samples from different sites present a wide content range of the zeolitic phase - 15% to 50%. The use of simple separation techniques - conventional gravitic treatments - yields concentrates containing about 67% of the zeolitic component. Assays with the amendments of these concentrates with plant nutrients yield release rates matching those reported for similar commercial products.

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15.

Predation rate of Spodoptera frugiperda (Lepidoptera: Noctuidae) larvae with and without defense by Podisus nigrispinus (Heteroptera: Pentatomidae)
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Zanuncio, José Cola

; Silva, Carlos Alberto Domingues da

; Lima, Eraldo Rodrigues de

; Pereira, Fabrício Fagundes

; Ramalho, Francisco de Souza

; Serrão, José Eduardo

Brazilian Archives of Biology and Technology

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feb 2008, Volume 51 N. 1 Pages 121 - 125

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Objetivou-se determinar o efeito da defesa da presa Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae) na taxa de predação por fêmeas de Podisus nigrispinus (Dallas) (Heteroptera: Pentatomidae). Podisus nigrispinus, predou 1,0; 1,4; 1,2; 3,8; 3,0 lagartas de terceiro estádio de S. frugiperda com defesa, respectivamente, nas densidades de uma, duas, quatro, seis e oito lagartas, enquanto esses valores foram de 0,4; 0,8; 1,6; 2,8; 3,2 lagartas sem defesa, respectivamente, nessas densidades. A taxa de ataque (a) e o tempo de manipulação (Th) foram, respectivamente, de 0,67 ± 0,39-h e 6,72 ± 2,88 horas para fêmeas de P. nigrispinus alimentadas com lagartas com defesa e de 2,51 ± 0,16-h e 0,51 ± 0,77 horas para aquelas sem defesa. A resposta funcional do predador P. nigrispinus varia com a defesa e a densidade da presa S. frugiperda, com maior consumo de presas sem defesa em altas densidades.

The effect of the defense of the prey Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae) on predation rates of Podisus nigrispinus (Dallas) (Heteroptera: Pentatomidae) females was studied. P. nigrispinus preyed 1.0, 1.4, 1.2, 3.8 and 3.0 and 0.4, 0.8, 1.6, 2.8 and 3.2 third instars of S. frugiperda larvae with and without defense, respectively, with the densities of one, two, four, six and eight larvae. The attack rate and the manipulation time were, respectively, 0.67 ± 0.39-h and 6.72 ± 2.88 h for P. nigrispinus females fed with larvae with defense and 2.51 ± 0.16-h and 0.51 ± 0.77 h for those without defense. The functional response of the predator P. nigrispinus varies with the defense and the density of the prey S. frugiperda, with larger consumption of prey without defense at higher densities.

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