Pesquisa | SciELO

Abstract Banana preserve is produced by mixing the puree of the fruit with sucrose and organic acids. However, concerns about body esthetics or health reasons have encouraged the search for low-calorie products. Therefore, the objective of this study was to evaluate the effect of calcium chloride (CaCl2), carrageenan gum, and low methoxyl pectin (LM-pectin) on the physicochemical and sensory characteristics of sugar-free banana preserves. By using a central composite rotational design (CCRD) of 2³ + 6 axial points + 4 central points, we obtained 18 formulations that were further tested. Lower CaCl2 concentrations (0.54% to 0.61%) resulted in preserves with lower pH and more vivid color. The increased concentration of LM-pectin (1.40% to 1.64%) resulted in formulations with a yellowish-red hue and with lower moisture, thus, reducing the flavor and purchase intention of the product. Higher concentrations of carrageenan gum (1.04% to 1.15%) decreased the perception of banana preserve aroma. Therefore, concentrations of CaCl2 ranging from 0.54% to 0.61%, carrageenan gum ranging from 0.74% to 0.89% and LM-pectin ranging from 1.40% to 1.64% resulted in sugar-free banana preserves with ideal sweetness and consistency and were, therefore, more acceptable.

https://doi.org/10.1590/0001-3765202320201480

Filling a gap: endophytic fungal diversity in the leaves of Miconia mirabilis in the Atlantic Forest (Brazil) and the description of a new Muyocopron species
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Ferro, Layanne O.

; O. Junior, Isaias

; Cavalcanti, Anthony Dias

; Cavalcante, Larissa O.

; Oliveira, Thays Gabrielle Lins de

; Paiva, Laura Mesquita

; Souza-Motta, Cristina M.

; Bezerra, Jadson D.P.

Acta Botanica Brasilica

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2023, Volume 37 elocation e20230101

Resumo: En | Texto: En | PDF: En

Abstract Brazilian biomes, such as the Atlantic Forest, are hotspots for microbial diversity. Fungi at some stages of their life cycle can inhabit the interior of plants without apparent damage and are called endophytes. This study aimed to verify the culturable diversity of endophytic fungi present in the leaves of Miconia mirabilis in a conservation unit of the Atlantic Forest, in Northeast Brazil. A total of 273 endophytes were isolated, and 88 % of the estimated richness was recovered from 40 taxa with a Shannon diversity index of H′ = 2.79. The most abundant order was Xylariales (37.73 %), with Xylaria cf. cubensis being the most abundant species, followed by Glomerellales (14.65 %), Eurotiales (3.66 %), and Diaporthales (3.33 %). Additionally, a novel endophytic fungal species of Muyocopron was identified. Our results indicate the potential of endophytic diversity in the plants of tropical forests, reinforcing the need for further studies to better understand their ecological relationships.

https://doi.org/10.1590/1677-941x-abb-2023-0101

Safety of genetically modified glyphosate-tolerant eucalyptus designed for integrated weed management
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Avisar, Dror

; Dias, Tatiane B.

; Santos, Anselmo A. dos

; Galan, Maria P.

; Gonsalves, José M. W

; Graça, Rodrigo N.

; Livne, Sivan

; Manoeli, Alexandre

; Drezza, Thaís R.

; Porto, Antonio C. M.

; Rocha, Carolina S.

; Pinheiro, Ana Cristina

Advances in Weed Science

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2023, Volume 41 elocation e020230032

Resumo: En | Texto: En | PDF: En

Background Eucalyptus is the primary cultivated wood species in Brazil, covering 7.5 million hectares. Weed competition in eucalyptus plantations reduces yield and increases operational costs. FuturaGene/Suzano has developed genetically modified (GM) eucalyptus varieties with glyphosate herbicide tolerance (HT) as a modern tool for improving weed management practices in plantations. The first event received regulatory approval for commercial deployment in 2021. However, the introgression of a new GM trait into eucalyptus, a non-isogenic species, cannot be achieved through selfing or backcrossing. To overcome this limitation and expedite the introgression of HT into the breeding population, multiple GM events were generated, in various genetic backgrounds and genomic locations, enabling simultaneous crossing with numerous elite parents. Objective To characterize the newly developed HT GM eucalyptus events and assess their safety for the environment and wood production. Methods HT GM eucalyptus events were subjected to genome sequencing and glyphosate tolerance testing. Biosafety analyses and environmental impact assessments were conducted through field trials in various eucalyptus cultivation regions, comparing the HT GM eucalyptus with conventional clones. Results The new events proved highly tolerant to glyphosate and displayed different genomic insertion sites. No adverse effects on non-target organisms were observed, and there were no significant differences in the soil microbiota or decomposition profile.Conclusions: The HT GM events have been proven to be safe, posing a low risk to the environment, humans, and animals. Consequently, these HT GM eucalyptus varieties can be confidently utilized for wood production.

https://doi.org/10.51694/advweedsci/2023;41:00019

Marcadores moleculares subrogados a la repelencia al agua en suelos afectados por el fuego
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Jiménez-Morillo, Nicasio T.

; Almendros, Gonzalo

; Guiomar, Nuno

; Miller, Ana Z.

; Barrocas-Dias, Cristina

; Rosa, José M. de la

; Hatcher, Patrick G.

; González-Pérez, José A.

Revista de Ciências Agrárias

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Dez 2022, Volume 45 Nº 4 Páginas 831 - 840

Resumo: Es En | Texto: Es En | PDF: Es | PDF: En

Resumen La repelencia al agua del suelo (RAS) se atribuye a la acumulación de compuestos hidrofóbicos (lípidos), pero su extracción no siempre elimina la RAS, lo que sugiere que componentes macromoleculares no extraíbles también pueden estar relacionados con una RAS. Se han estudiado suelos quemados (B) y control (UB) del Parque Nacional de Doñana (Huelva, España) bajo dos tipos de vegetación (alcornoque y brezo) y fracciones de suelo: gruesa (1-2 mm) y fina (<0.05 mm). La composición molecular de la materia orgánica del suelo (MOS) se analizó mediante espectrometría de masas de ultra-alta resolución. Además, se empleó la regresión por mínimos cuadrados parciales (PLS) para explorar la relación entre la RAS y la MOS definida por la abundancia de los 1221 compuestos orgánicos comunes. También se utilizaron índices para obtener gráficas que faciliten la identificación de biomarcadores de la RAS. En los suelos quemados, la RAS estaba significativamente relacionada (P<0.05) con compuestos aromáticos y condensados, mientras que, en los suelos control, la MOS incluía compuestos aromáticos y ligninas. En las fracciones finas, la RAS estuvo relacionada principalmente con lípidos, pero, no se encontró correlación en las fracciones gruesas. Los resultados permiten concluir que la hidrofobicidad depende de varias famílias de compuestos orgánicos. La combinación de la FT-ICR/MS con herramientas estadísticas ha facilitado la obtención de nuevos biomarcadores de RAS.

Abstract Soil water repellency (SWR) is often attributed to the accumulation of hydrophobic organic compounds, mainly lipids. Nonetheless, lipid extraction not always suppress SWR and unextractable soil constituents may be related with residual SWR. Burnt (B) and unburnt (UB) soils (Doñana National Park, Huelva) under two vegetations (cork oak and heather) and two soil fractions, coarse (1-2 mm) and fine (<0.05 mm) were studied. Soil organic matter (SOM) molecular composition was studied by ultra-high resolution mass spectrometry. Partial least squares regression (PLS) was employed to explore SWR in function the abundance of the 1221 common compounds found. An omic approach using various indices (e.g., factor loadings of PLS models, etc,) was applied to identify compounds which could be used as proxies for SWR. In the case of B soils, SWR was related (P< 0.05) to aromatic and condensed compounds, while in UB soils it relied mainly on aromatics and lignins. In the fine fractions, lipids were associated with SWR, and no correlation was found in the coarse fractions. In conclusion, hydrophobicity was related to lipids as expected, but also to lignin and aromatic components. The combination of FT-ICR/MS with graphical statistical approach was effective in finding molecular predictors of SWR.

https://doi.org/10.19084/rca.28639

Association of the essential oil of Cymbopogon citratus (DC) Stapf with nystatin against oral cavity yeasts
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PAIVA, LUIZ FRANCISLEY DE

; TEIXEIRA-LOYOLA, ANA BEATRIZ A.

; SCHNAIDER, TAYLOR B.

; SOUZA, ANGÉLICA CRISTINA DE

; LIMA, LIDIANY M. ZACARONI

; DIAS, DISNEY R.

Anais da Academia Brasileira de Ciências

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2022, Volume 94 Nº 1 elocation e20200681

Resumo: En | Texto: En | PDF: En

Abstract Oral thrush or candidiasis is a fairly common infectious fungal disease that is mainly caused by species of the genus Candida spp. In this work, we evaluated the antifungal activity of the essential oil of Cymbopogon citratus (DC) Stapf (lemongrass) and its combination with nystatin against oral cavity yeasts. The oil was extracted by the steam distillation method, and its constituents were quantified. The yeasts were identified using MALDI-TOF MS. The sensitivity to the essential oil and its association with nystatin was verified by the minimum inhibitory concentration (MIC) and checkerboard methods. In the essential oil samples, there were 84.53% of citral. A total of 64.77% of strains were identified as Candida albicans. On susceptibility tests, 83.55% of the yeast isolates were inhibited in concentrations of ≥16 µg/mL of nystatin. C. citratus’s oil was capable of inhibiting and killing all the isolates tested with concentrations that varied from 0.137 to 2.2 mg/mL. The association of oil and nystatin had an additive effect on more than 78% of the strains. The association of this herbal drug with nystatin potentialized the antifungal effect on yeast samples isolated from the oral cavity of oncologic patients.

https://doi.org/10.1590/0001-3765202220200681

Atualização da Diretriz Brasileira de Hipercolesterolemia Familiar – 2021
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Izar, Maria Cristina de Oliveira

; Giraldez, Viviane Zorzanelli Rocha

; Bertolami, Adriana

; Santos Filho, Raul Dias dos

; Lottenberg, Ana Maria

; Assad, Marcelo Heitor Vieira

; Saraiva, José Francisco Kerr

; Chacra, Ana Paula M.

; Martinez, Tania L. R.

; Bahia, Luciana Ribeiro

; Fonseca, Francisco Antonio Helfenstein

; Faludi, Andre Arpad

; Sposito, Andrei C.

; Chagas, Antônio Carlos Palandri

; Jannes, Cinthia Elim

; Amaral, Cristiane Kovacs

; Araújo, Daniel Branco de

; Cintra, Dennys Esper

; Coutinho, Elaine dos Reis

; Cesena, Fernando

; Xavier, Hermes Toros

; Mota, Isabela Cardoso Pimentel

; Giuliano, Isabela de Carlos Back

; Faria Neto, José Rocha

; Kato, Juliana Tieko

; Bertolami, Marcelo Chiara

; Miname, Marcio Hiroshi

; Castelo, Maria Helane Costa Gurgel

; Lavrador, Maria Sílvia Ferrari

; Machado, Roberta Marcondes

; Souza, Patrícia Guedes de

; Alves, Renato Jorge

; Machado, Valeria Arruda

; Salgado Filho, Wilson

Arquivos Brasileiros de Cardiologia

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Out 2021, Volume 117 Nº 4 Páginas 782 - 844

Resumo: Pt En | Texto: Pt En | PDF: Pt | PDF: En

https://doi.org/10.36660/abc.20210788 231 downloads

Ecologia de Sinningia rupicola (Mart.) Wiehler (Gesneriaceae) em duas Reservas Particulares do Patrimônio Natural situadas no Quadrilátero Ferrífero, Estado de Minas Gerais, Brasil
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Santos, Lídia Maria dos

; Morais, Rúbio Oliveira

; Tomich, Sérgio

; Salim, Ione Serafini Hannas

; Assunção-Silva, Caroline C

; Pivari, Marco Otávio Dias

; Simões, Iago Junqueira

; Amoroso, Ana Cristina A

Hoehnea

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2021, Volume 48 elocation e822020

Resumo: Pt En | Texto: Pt En | PDF: Pt | PDF: En

ABSTRACT Sinningia rupicola (Gesneriaceae), espécie ameaçada de extinção e classificada como endêmica de canga do Quadrilátero Ferrífero é aqui apresentada sob uma abordagem ecológica, baseada na análise de dados referentes a registros realizados em duas Reservas Particulares do Patrimônio Natural (RPPN) da empresa Vale, situadas no Quadrilátero Ferrífero, Estado de Minas Gerais, Brasil: Capanema e Poço Fundo. O estudo visou caracterizar a população da espécie quanto ao número de indivíduos, área de ocupação (AOO), extensão de ocorrência (EOO) e aspectos ambientais dos locais de registros relacionados à topografia, cobertura vegetal e litologia, além de avaliação do substrato, micro-habitat e fenologia. Foram registrados 1.397 indivíduos, sendo 1.254 na RPPN Capanema e 143 na RPPN Poço Fundo. As populações foram registradas colonizando rochas Quartzíticas, em altitudes que variaram entre 1.400 e 1.600 m. As populações foram caracterizadas como predominantemente saxícolas, encontradas em floração entre janeiro e março e com frutos entre fevereiro e março. Os resultados obtidos neste estudo demonstram a ocorrência de Sinningia rupicola em litologias variadas, o que sugere que a distribuição da espécie em ambientes naturais é mais ampla do que a até então presumida.

RESUMO Sinningia rupicola (Gesneriaceae), an endangered species classified as endemic to the cangas of the Quadrilátero Ferrífero is presented here under an ecological approach. It was based on data analysis of two populations sampled in the Private Natural Heritage Reserves (RPPN) Capanema and Poço Fundo belonging to the company Vale S.A., located at the Quadrilátero Ferrífero, state of Minas Gerais, Brazil. The study aimed to characterize the populations of the species regarding the number of individuals, area of occupancy (AOO), extent of occurrence (EOO) and the environmental aspects of the record sites. The populations were related to topography, hydrography, vegetation cover and lithology, as well as substrate, micro-habitat and phenology evaluation. In total, it was registered 1,397 individuals, 1,254 at RPPN Capanema and 143 at RPPN Poço Fundo. The populations were found occurring on quartzitic rocks, at altitudes ranging from 1,400 to 1,600 m. The populations were characterized as predominantly saxicolous, flowering between January and March and with fruits between February and March. The results obtained in this study demonstrate the occurrence of Sinningia rupicola in varied lithologies suggesting that its occurrence in natural environments may be wider than previously assumed.

https://doi.org/10.1590/2236-8906-82/2020 1 downloads

Tromboembolismo Pulmonar em um Paciente Jovem com COVID-19 Assintomático
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Borges, Nicolas H.

; Godoy, Thiago M.

; Pereira, Marcos Roberto Curcio

; Stocco, Rebecca B.

; Dias, Viviane Maria de Carvalho Hessel

; Baena, Cristina Pellegrino

; Marques, Gustavo Lenci

Arquivos Brasileiros de Cardiologia

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Dez 2020, Volume 115 Nº 6 Páginas 1205 - 1207

Resumo: Pt En | Texto: Pt En | PDF: Pt | PDF: En

https://doi.org/10.36660/abc.20200957 4073 downloads

Taxonomia corporativa e taxonomia facetada: usos e aplicações na ciência da informação no Brasil
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Lopes, Pâmela Tamires Dias

; Aganette, Elisângela Cristina

; Maculan, Benildes Coura M. S.

Investigación bibliotecológica

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Mar 2020, Volume 34 Nº 82 Páginas 159 - 173

Resumo: Pt En Es | Texto: Pt En Es | PDF: Pt | PDF: En | PDF: Es

Resumo As taxonomias permitem uma recuperação da informação mais precisa, pois direciona o usuário na busca, por meio dos rótulos das classes e subclasses presentes na estrutura hierárquica. O objetivo do presente artigo é apresentar resultado parcial de uma pesquisa mais ampla, oferecendo os usos e aplicações de taxonomias corporativas e facetadas como instrumentos de representação da informação e do conhecimento, descritas em teses e dissertações no âmbito da Ciência da Informação. A metodologia incluiu um levantamento bibliográfico na Biblioteca Digital de Teses e Dissertações da Capes, para mapear as teses e dissertações relacionadas à temática. Foram recuperadas apenas sete dissertações na Ciência da Informação, no período de 15 anos, e nenhuma tese. A análise dos documentos utilizou o método da Análise de Conteúdo, a partir das categorias: objetivo, metodologia, produto final e trabalhos futuros. Os resultados mostraram o estado da arte dos usos e aplicações dos instrumentos investigados, assim como as tendências para estudos futuros. O quantitativo pouco representativo de pesquisas evidencia a necessidade de mais estudos envolvendo esses instrumentos.

Abstract Taxonomies allow a more accurate retrieval of information, since they direct the user to the search, through the labels of the classes and subclasses present in the hierarchical structure. The purpose of this article is to present a partial result of a broader research, offering the uses and applications of corporate and face taxonomies as instruments of information and knowledge representation, described in theses and dissertations in the field of Information Science. The methodology included a bibliographic survey in the Biblioteca Digital de Teses e Dissertações of Capes, in order to map the theses and dissertations related to the subject. Only seven dissertations in Information Science were retrieved over a period of 15 years, and not even one thesis. The exploration of the documents used the Content Analysis method, based on the categories: objective, methodology, final product and future work. The results showed the state of the art over the uses and applications of the investigated instruments, as well as the trends for future studies. The non-representative quantitative of the research evidenced the need for more studies involving these instruments.

Resumen Las taxonomías permiten una recuperación más precisa de la información, ya que ayudan al usuario a buscar a través de las etiquetas de las clases y subclases presentes en la estructura jerárquica. El objetivo de este artículo es presentar un resultado parcial de una investigación más amplia, ofreciendo los usos y aplicaciones de las taxonomías corporativas y facetadas como instrumentos de representación de la información y el conocimiento, descritos en trabajos académicos en el campo de las ciencias de la información. La metodología incluyó una encuesta bibliográfica en la Biblioteca Digital de Teses e Dissertações de Capes, para mapear las tesis y tesis de posgrado relacionadas con el tema. Sólo se recuperaron siete tesis de posgrado en ciencias de la información en el periodo de 15 años, y ninguna tesis. En el análisis de los documentos se utilizó el método de análisis de contenidos, a partir de las categorías objetivo, metodología, producto final y trabajos futuros. Los resultados mostraron el estado del arte de los usos y aplicaciones de los instrumentos investigados, así como las tendencias para estudios futuros. La pequeña cantidad de investigaciones evidenció la necesidad de realizar más estudios que involucren estos instrumentos.

https://doi.org/10.22201/iibi.24488321xe.2020.82.58062 473 downloads

10.

Toxicological effects of ciprofloxacin and chlorhexidine on growth and chlorophyll a synthesis of freshwater cyanobacteria
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Azevedo, Fernanda Cristina Rezende

; Vaz, Izabela Cristina Dias

; Barbosa, Francisco Antônio Rodrigues

; Magalhães, Sérgia Maria Starling

Brazilian Journal of Pharmaceutical Sciences

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2019, Volume 55 elocation e17661

Resumo: En | Texto: En | PDF: En

Cyanobacteria are phytoplanktonic microorganisms that are susceptible to the deleterious effects of pharmaceutical residues in the aquatic environment, which poses a challenge to the environment exposed to diverse pharmaceutical products and their potential effects. The objective of this study was to evaluate the effects of the antibiotic substances ciprofloxacin and chlorhexidine in pharmaceutical preparations on the growth and production of chlorophyll of two cyanobacterial strains, Microcystis aeruginosa and Microcystis panniformis, isolated from a lake in a Brazilian environmental protection area. The EC50 and EC10 of chlorhexidine for M. aeruginosa were 206.4 µg/L and 108.5 µg/L, respectively, and for M. panniformis were 171.4 µg/L and 116.6 µg/L, respectively. The EC50 and EC10 of ciprofloxacin for M. aeruginosa were 17.24 µg/L and 3.21 µg/L, respectively, and for M. panniformis were 13.56 µg/L and 1.50 µg/L, respectively. The toxicity of the antibiotic ciprofloxacin (drug) and chlorhexidine (standard solution) to the Microcystis species was demonstrated, and these species were both very sensitive to ciprofloxacin. Our results suggest that the strains of M. aeruginosa and M. panniformis may be affected by exposure to residues of ciprofloxacin (>1.5 µg/L), which may represent a risk to the survival of aquatic species.

https://doi.org/10.1590/s2175-97902019000217661 1185 downloads

11.

Distribution, diversity, and habitat partitioning of Scolecitrichidae species (Copepoda: Calanoida) down to 1,200 m in the Southwestern Atlantic Ocean
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DIAS, CRISTINA O.

; ARAUJO, ADRIANA V. DE

; BONECKER, SÉRGIO L.C.

Anais da Academia Brasileira de Ciências

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2019, Volume 91 Nº 1 elocation e20170973

Resumo: En | Texto: En | PDF: En

In this study, we analyzed the main distributional features of Scolecitrichidae species in the Southwestern Atlantic Ocean (northern region of Rio de Janeiro State) and determined and described their habitat partitioning, based on a night series of stratified samplings down to a depth of 1,200 m. A total of 18 species from seven genera were identified and grouped according to their depth distribution. Distinct vertical patterns of total density, richness, diversity, and evenness were observed, with a decrease in density and an increase in diversity and richness with increasing depth. The total scolecitrichid abundance was dominated by a few epipelagic migrant species (Scolecithrix danae, Scolecithricella minor, Amallothrix tenuiserrata, and Lophothrix frontalis). The nondominant species were distributed in different habitats in the mesopelagic layer (upper-mesopelagic, mesopelagic, and lower-mesopelagic species) according to their vertical patterns of abundance and occurrence in the two sampling periods (rainy and dry season). The total density of scolecitrichid copepods was positively related to temperature and nitrate, and negatively related to silicate at 1 m depth. The abundance of scolecitrichids copepods in the upper layer with warm and oligotrophic waters supports the hypothesis of the influence of different water masses on the scolecitrichid assemblage. High abundance of appendicularians (Oikopleura longicauda) at 1 m depth in the region implies a high production rate of discarded “houses”, an important dietary component for Scolecitrichidae copepods. The observed patterns of seasonal cycles and vertical distribution suggest that the diverse scolecitrichid assemblage in the region may be structured mainly according to the partitioning of vertical habitats and food resources.

https://doi.org/10.1590/0001-3765201920170973 1234 downloads

12.

Study of the Naphthenic Corrosion of AISI 316 and AISI 1020 Steels by Light, Scanning Electron and Atomic Force Microscopies (LM, SEM and AFM)
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Domingos, Débora V.

; Tozzi, Fabrício C.

; Barros, Eliane V.

; Pinto, Fernanda E.

; Sad, Cristina M. S.

; Filgueiras, Paulo R.

; Lacerda Jr., Valdemar

; Dias, Heloisa P.

; Aquije, Glória M. V. F.

; Romão, Wanderson

Journal of the Brazilian Chemical Society

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Nov 2018, Volume 29 Nº 11 Páginas 2244 - 2253

Resumo: En | Texto: En | PDF: En

Corrosion processes were evaluated for AISI 316 and AISI 1020 steels by scanning electron microscopy (SEM), atomic force microscopy (AFM) and light microscopy. Coupons were immersed in four crude oil samples with different total acid numbers (TANs) for 48 days at room temperature. The steels were also exposed to three blends (B1-B3), produced by quaternary mixtures of the oils, with lower TANs than their respective original oils. SEM micrographs showed pitting-type corrosion in most cases. AFM imaging showed drastic changes in the peak-to-peak values, topographic profiles and phase images of the AISI 1020 coupons exposed to all oils and blend B3 as compared to the unexposed steel. Defects were produced on the surface of almost all the samples exposed to naphthenic corrosion. Exposure to the oil blends reduced the extent of the naphthenic corrosion on the coupons, especially blends B1 and B2. The oil mixtures (blends) reduced corrosion.

https://doi.org/10.21577/0103-5053.20180101 495 downloads

13.

Essential oils from Piper aduncum inflorescences and leaves: chemical composition and antifungal activity against Sclerotinia sclerotiorum
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VALADARES, ANNA CAROLINA F.

; ALVES, CASSIA CRISTINA F.

; ALVES, JOSÉ MILTON

; DE DEUS, ISABELLA P.B.

; DE OLIVEIRA FILHO, JOSEMAR G.

; DOS SANTOS, TAINÁ CAROLINE L.

; DIAS, HERBERT JÚNIOR

; CROTTI, ANTÔNIO EDUARDO M.

; MIRANDA, MAYKER L.D.

Anais da Academia Brasileira de Ciências

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Set 2018, Volume 90 Nº 3 Páginas 2691 - 2699

Resumo: En | Texto: En | PDF: En

Abstract Even though essential oils from Piper aduncum (Piperaceae) have different biological activities, little is known about their application to agricultural areas. White mold is a plant disease caused by the phytopathogen Sclerotinia sclerotiorum, which needs to be controlled by alternative measures. This study aimed at evaluating the effect of essential oils from P. aduncum leaves (PL-EO) and inflorescences (PI-EO) on the mycelial growth of S. sclerotiorum. Essential oils from P. aduncum were obtained by hydrodistillation by a Clevenger-type apparatus while their chemical composition was analyzed by GC-MS and GC-FID. Piperitone (23.4 %), myristicin (12.4 %), terpinen-4-ol (12.3 %), β-caryophyllene (7.2 %), α-humulene (6.9 %), germacrene-D (6.9 %) and dillapiol (6.3 %) were the main constituents found in oils from P. aduncum. The in vitro antifungal activity showed that PI-EO dose above 30 µL inhibited mycelial growth in 100 %, whereas PL-EO at 50 µL inhibited it in 98.74 %. This is the first report of the chemical composition of PI-EO and results suggest that the essential oils under evaluation have high potential to control the phytopathogenic fungus S. sclerotiorum.

https://doi.org/10.1590/0001-3765201820180033 2012 downloads

14.

Brazilian Consensus for the Treatment of Multiple Sclerosis: Brazilian Academy of Neurology and Brazilian Committee on Treatment and Research in Multiple Sclerosis
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Marques, Vanessa Daccach

; Passos, Giordani Rodrigues dos

; Mendes, Maria Fernanda

; Callegaro, Dagoberto

; Lana-Peixoto, Marco Aurélio

; Comini-Frota, Elizabeth Regina

; Vasconcelos, Cláudia Cristina Ferreira

; Sato, Douglas Kazutoshi

; Ferreira, Maria Lúcia Brito

; Parolin, Mônica Koncke Fiuza

; Damasceno, Alfredo

; Grzesiuk, Anderson Kuntz

; Muniz, André

; Matta, André Palma da Cunha

; Oliveira, Bianca Etelvina Santos de

; Tauil, Carlos Bernardo

; Maciel, Damacio Ramón Kaimen

; Diniz, Denise Sisteroli

; Corrêa, Eber Castro

; Coronetti, Fernando

; Jorge, Frederico M. H.

; Sato, Henry Koiti

; Gonçalves, Marcus Vinícius Magno

; Sousa, Nise Alessandra de C.

; Nascimento, Osvaldo J. M.

; Gama, Paulo Diniz da

; Domingues, Renan

; Simm, Renata Faria

; Thomaz, Rodrigo Barbosa

; Morales, Rogério de Rizo

; Dias, Ronaldo Maciel

; Apóstolos-Pereira, Samira dos

; Machado, Suzana Costa Nunes

; Junqueira, Thiago de Faria

; Becker, Jefferson

Arquivos de Neuro-Psiquiatria

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Ago 2018, Volume 76 Nº 8 Páginas 539 - 554

Resumo: Pt En | Texto: Pt En | PDF: Pt | PDF: En

RESUMO O crescent arsenal terapêutico na esclerose múltipla (EM) tem permitido tratamentos mais efetivos e personalizados, mas a escolha e o manejo das terapias modificadoras da doença (TMDs) tem se tornado cada vez mais complexos. Neste contexto, especialistas do Comitê Brasileiro de Tratamento e Pesquisa em Esclerose Múltipla e do Departamento Científico de Neuroimunologia da Academia Brasileira de Neurologia reuniram-se para estabelecer este Consenso Brasileiro para o Tratamento da EM, baseados no entendimento de que neurologistas devem ter a possibilidade de prescrever TMDs para EM de acordo com o que é melhor para cada paciente, com base em evidências e práticas atualizadas. Por meio deste documento, propomos recomendações práticas para o tratamento da EM, com foco principal na escolha e no manejo das TMDs, e revisamos os argumentos que embasam as estratégias de tratamento na EM.

ABSTRACT The expanding therapeutic arsenal in multiple sclerosis (MS) has allowed for more effective and personalized treatment, but the choice and management of disease-modifying therapies (DMTs) is becoming increasingly complex. In this context, experts from the Brazilian Committee on Treatment and Research in Multiple Sclerosis and the Neuroimmunology Scientific Department of the Brazilian Academy of Neurology have convened to establish this Brazilian Consensus for the Treatment of MS, based on their understanding that neurologists should be able to prescribe MS DMTs according to what is better for each patient, based on up-to-date evidence and practice. We herein propose practical recommendations for the treatment of MS, with the main focus on the choice and management of DMTs, as well as present a review of the scientific rationale supporting therapeutic strategies in MS.

https://doi.org/10.1590/0004-282x20180078 8891 downloads

15.

Study of the Corrosive Behavior of the AISI 1020 Steel in Acid Crude Oil by Microscopic Techniques (LM, AFM and SEM/EDX) and Raman Spectroscopy
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Dias, Heloisa P.

; Barros, Eliane V.

; Sad, Cristina M. S.

; Yapuchura, Enrique R.

; Gomes, Alexandre O.

; Moura, Robson

; Pinto, Fernanda E.

; Domingos, Débora V.

; Aquije, Glória M. F. V.

; Lacerda Jr., Valdemar

; Romão, Wanderson

Journal of the Brazilian Chemical Society

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Ago 2018, Volume 29 Nº 8 Páginas 1690 - 1700

Resumo: En | Texto: En | PDF: En

Microscopic techniques were combined to study the influence of corrosion rate on the morphologic behavior of AISI 1020 steel specimens submitted to thermal degradation of a typical acid crude oil (total acid number (TAN) = 2.1390 mg KOH g-1 and total sulfur (S) = 0.7778 wt.%). The techniques used were light microscopy (LM), scanning electron microscopy/energy dispersive spectroscopy (SEM/EDX), atomic force microscopy (AFM) as well as Raman spectroscopy. Assays were performed in six different degradation time (t = 6, 12, 24, 36, 48 and 72 h) at 320 ºC. After the exposure of the specimens to petroleum, a reduction above 37% in the TAN after t = 72 h was observed, with a maximum corrosion rate during the first periods of degradation (t = 6 and 12 h). Correlating the TAN and corrosion rate data with the microscopic data, the images of LM, AFM, and SEM/EDX showed that after 6 h of exposure to petroleum, a passivation film was formed on the surface of the steel. This film consisted of two layers, an external one, formed of FeS, and an internal one, composed of iron oxides and oxyhydroxides. However, after 48 h of thermal degradation, this morphology was altered to a single layer of FeS coating the steel surface.

https://doi.org/10.21577/0103-5053.20180043 793 downloads

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