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Cancer is one of the major causes of death worldwide, and breast cancer is the most prevalent and deadly type among women. Despite the side effects and the phenomena of chemoresistance associated with the drugs involved, chemotherapy remains the main therapeutic strategy to combat and control breast cancer. Therefore, several new classes of compounds against breast cancer have been explored, in an effort to identify new drug candidates with alternative mechanisms of action. The principal results of such exploration, focusing on caged xanthones, thiosemicarbazones and photosensitizers, are presented in this review, along with the main aspects of the drug discovery process against breast cancer. More specifically, the design, structure-activity relationship investigations and anti-breast cancer properties of these three classes are described and discussed in this work. worldwide women involved Therefore explored action exploration xanthones photosensitizers review specifically design structureactivity structure activity antibreast anti work

https://doi.org/10.21577/0103-5053.20230128

Chaotic dynamics in memristive circuits
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Iarosz, Kelly C.

; Gabrick, Enrique C.

; Trobia, José

; Borges, Rafael R.

; Protachevicz, Paulo R.

; Bonetti, Robson C.

; de Souza, Silvio L.T.

; Batista, Gabriel L.

; Szezech Jr., José D.

; Caldas, Iberê L.

; Batista, Antonio M.

Revista Brasileira de Ensino de Física

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2023, Volume 45 elocation e20230116

Abstract: En | Text: En | PDF: En

Memristors (abbreviation of memory and resistor), introduced as the fourth fundamental electrical circuit element, remember the electric charge that flowed through it. These nonlinear elements are considered as a class of two terminal resistive devices and offers a lot of possible applications in various areas. In this article, we review the dynamical behaviour of some electrical circuits with memristors. Initially, we show that a simple circuit with a capacitor and an inductor connected to a memristor exhibits periodic and chaotic attractors. After that, we show that the known Chua circuit, with a nonlinear resistance, can generate bifurcations and chaos. Substituting the nonlinear resistance by a memristor, the modified Chua circuit exhibits coexistence of attractors. Another known circuit, the Colpitts, is made of a combination of capacitors and inductors containing a bipolar junction transistor. We show that the modified Colpitts circuit, created by substituting the transistor by a memristor, presents multistability and coexistence of many attractors.

https://doi.org/10.1590/1806-9126-rbef-2023-0116

Model Membranes and Antimicrobial Activities of pH-Sensitive Copolymers
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Saraiva, Greice K.

; Souza, Valdomiro V. de

; Oliveira, Luciana C. de

; Procópio, Alyne

; Martins, Maisa T.

; Aidar, Isabel N.

; Yi, Ronaldo C. F.

; Lacerda, Caroline D.

; Carretero, Gustavo P B.

; Lira, Rafael B. de

; Riske, Karin A.

; Salinas, Roberto K.

; Chaimovich, Hernan

; Florenzano, Fábio H.

; Cuccovia, Iolanda M.

Journal of the Brazilian Chemical Society

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2023, Volume 34 N. 12 Pages 1863 - 1876

Abstract: En | Text: En | PDF: En

Polymers are options as antimicrobials for skin protection, antifouling surfaces, and fabrics. Here we analyzed the interaction of polymers based on poly(methacrylate) (PMMA) and poly((dimethylamino ethyl) methacrylate) (PDMAEMA) with model membranes and bacteria. We used the homopolymers PMMA, PDMAEMA, and the diblock copolymer(s) prepared with different PMMAm:PDMAEMAn ratios (m/n). The interactions of PDMAEMA and PMMAm-b-PDMAEMAn with large unilamellar vesicles (LUVs) prepared with phosphatidylcholine and phosphatidylglycerol at different pHs, were analyzed by nuclear magnetic resonance (NMR), dynamic light scattering, and zeta potential. These polymers promoted LUVs leakage of a fluorescent probe (5,6-carboxyfluorescein) localized exclusively in the internal aqueous compartment. Interestingly, all copolymers exhibit a bell-shaped pH dependence for the polymer-induced LUVs leakage. The interaction of the positively charged polymers and the pH effect was also demonstrated using giant unilamellar vesicles. These copolymers inhibited bacterial growth in the micromolar range and can be used to prevent bacterial growth on surfaces.

https://doi.org/10.21577/0103-5053.20230079

Deep sea ecosystem exploration and ‘health check’: sampling strategy and methods applied during the iAtlantic_BR10_Petrobras cruise in the Santos Basin, Southwest Atlantic
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Perez, Jose Angel A.

; Barros Neto, Halésio M.C. de

; Arantes, Renata C.M.

; Gaurisas, Daniela Y.

; Silva, Camila F.

; Alves, Fernanda Maria M.

; Costa, Júlia A.

; Eloi, Paula D.C.

; Fonseca, Thayse S.

; Gavazzoni, Lucas

; Lonskis, Isabella da S.

; Nardi, Ricardo U.

; Nascimento, Pedro O.

; Rodrigues, João Vitor M.

; Santos, Ana Lara F. dos

; Santos, Edson C. dos

; Schroeder, Rafael

; Silva, Luis Carlos da

; Souza, Fernanda dos S.S. de

; Bernardino, Ângelo F.

; Cavalcanti, Guarani H.

; Lindner, Alberto

; Mahiques, Michel M. de

; Millo, Christian

; Reis, Priscila

; Sweetman, Andrew K.

; Roberts, J. Murray

Ocean and Coastal Research

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2023, Volume 71 elocation e23046

Abstract: En | Text: En | PDF: En

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

Isso a marca não o mostra: omissões e distorções comunicacionais empresariais à luz do imaginário
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Torres, Leonardo

; Souza, Rafael Rodrigues de

Intercom: Revista Brasileira de Ciências da Comunicação

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2023, Volume 46 elocation e2023135

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

Abstract We propose a symbolic investigation of two publications posted on Instagram by Heineken and Carrefour. This choice was made because they represent the idea of “political correctness”. The objective is to analyze these communications from an imaginary theories perspective, as suggested by M. Contrera, G. Durand, C. Jung, and others, as this action allows the identification of hidden aspects in the publications and the perception of what information is there, however, in addition to the obviousness of commercial interests that aim to reinforce the brand’s good public reputation. Our conclusions suggest that it is possible to change this biased perception by building a critical mass sufficiently qualified to recognize these mechanisms that lead to communication one-sidedness.

Resumen Se propone la investigación simbólica de dos publicaciones en Instagram por Heineken y Carrefour. Esta elección se hizo porque representan la idea de “corrección política”. El objetivo es analizar estas comunicaciones a la luz de teorías imaginarias, como lo sugieren M. Contrera, G. Durand, C. Jung y otros, ya que esta acción permite identificar aspectos ocultos en las publicaciones y la percepción de qué información hay allí, sin embargo, además de la evidencia de intereses comerciales que apuntan a reforzar la buena reputación pública de la marca. Las conclusiones sugieren que es posible cambiar esta percepción sesgada construyendo una masa crítica, suficientemente calificada para reconocer estos mecanismos que conducen a la unilateralidad de la comunicación.

Resumo Propõe-se a investigação simbólica de duas publicações postadas no Instagram pela Heineken e pelo Carrefour. Essa escolha se deu por estas representarem a ideia do “politicamente correto”. O objetivo é analisar estas comunicações à luz das teorias do imaginário, conforme sugerem M. Contrera, G. Durand, C. Jung e outros, pois tal ação permite a identificação de aspectos escamoteados nas publicações e a percepção de quais informações estão ali, porém, além das obviedades dos interesses comerciais que visam reforçar a boa reputação pública da marca. As conclusões sugerem que é possível a mudança dessa percepção enviesada a partir da construção de uma massa crítica, suficientemente capacitada para reconhecer estes mecanismos que levam a uma unilateralidade comunicacional.

https://doi.org/10.1590/1809-58442023135pt

Organic matter and shading on ion accumulation in soil cultivated with noni under salinity
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Souza, Maria C. M. R. de

; Oliveira, Letícia K. B. de

; Costa, Rafael S. da

; Menezes, Ademir S.

; Amorim, Aiala V.

; Lacerda, Claudivan F. de

Revista Brasileira de Engenharia Agrícola e Ambiental

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nov 2022, Volume 26 N. 11 Pages 780 - 788

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

RESUMO Este trabalho teve como objetivo avaliar a influência da matéria orgânica no acúmulo de sais em três camadas de solo cultivado com plantas de noni irrigadas com água salobra, em condições de campo aberto e sombreamento parcial. O delineamento experimental foi em blocos ao acaso, disposto no esquema de parcelas subsubdivididas com cinco repetições. As parcelas foram constituídas pelos ambientes de cultivo (campo aberto e telado), as subparcelas pelas condutividades elétricas da água de irrigação (0,3; 1,5; 3,0; 4,5 e 6,0 dS m-1) e as subsubparcelas pela ausência e presença de matéria orgânica. Aos 110 dias após aplicação dos tratamentos, foram determinados a condutividade elétrica do extrato de saturação do solo e as concentrações de potássio, sódio, cálcio e magnésio em três camadas do solo (0-10, 10-20 e 20-30 cm). O sombreamento parcial reduziu o acúmulo total de sais e sódio no solo em relação ao campo aberto. O aumento da condutividade elétrica da água de irrigação reduziu as concentrações de potássio no solo, mas esse efeito foi compensado pela adição de matéria orgânica, que libera potássio, cálcio e magnésio para a nutrição das plantas. No entanto, o esterco bovino provoca acúmulo de sódio no solo nos tratamentos com maior salinidade da água.

ABSTRACT This study aimed to evaluate the influence of organic matter on the salt accumulation in three layers of soil cultivated with noni plants irrigated with brackish water, in open field and under partial shading conditions. The experimental design was in randomized blocks, arranged in a split-split-plot scheme with five replicates. The plots were constituted by the cultivation environments (open and shaded field), the subplots by the electrical conductivity of the irrigation water (0.3, 1.5, 3.0, 4.5, and 6.0 dS m-1), and the sub-subplots by the absence and presence of organic matter. At 110 days after application of the treatments, the electrical conductivity of the saturation extract and the potassium, sodium, calcium, and magnesium concentrations were determined in three soil layers (0-10, 10-20, and 20-30 cm). Partial shading reduced the total accumulation of salts and sodium in the soil compared to the open field. Increasing the electrical conductivity of irrigation water reduced potassium concentrations in the soil, but this effect is offset by the addition of organic matter, which releases potassium, calcium, and magnesium for plant nutrition. However, cattle manure increases sodium accumulation in the soil in treatments with the highest water salinity.

https://doi.org/10.1590/1807-1929/agriambi.v26n11p780-788

Cannabinoid receptor gene polymorphisms and cognitive performance in patients with schizophrenia and controls
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Ferretjans, Rodrigo

; de Souza, Renan P.

; Panizzutti, Bruna

; Ferrari, Pâmela

; Mantovani, Lucas

; de Campos-Carli, Salvina M.

; Santos, Rafael R.

; Guimarães, Fernanda C.

; Teixeira, Antonio L.

; Gama, Clarissa S.

; Salgado, João V.

Brazilian Journal of Psychiatry

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feb 2022, Volume 44 N. 1 Pages 26 - 34

Abstract: En | Text: En | PDF: En

Objective: To test the hypothesis that genetic variations of cannabinoid receptors contribute to the pathophysiology of cognitive deficits in schizophrenia. Methods: In this genetic association case-control study, cannabinoid receptor polymorphisms CNR1 rs12720071 and CNR2 rs2229579 were tested for association with neurocognitive performance in 69 patients with schizophrenia and 45 healthy controls. Neurocognition was assessed by the Brief Assessment of Cognition in Schizophrenia (BACS). Results: We found a consistent association between CNR1 rs12720071 polymorphism and the cognitive performance of patients in several cognitive domains. Patients with C/C polymorphism presented significantly worse performance in motor speed, verbal fluency, attention/processing speed and reasoning/problem solving. Conclusion: Although limited, our data support the hypothesis that CNR1 variations may be associated with the pathogenesis of cognitive deficits of schizophrenia.

https://doi.org/10.1590/1516-4446-2020-1650

Correlations between Web Searches and COVID-19 Epidemiological Indicators in Brazil
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Locatelli, Marcelo Sartori

; Cunha, Evandro L. T. P

; Guiginski, Janaína

; Franco, Ramon A. S

; Bernardes, Tereza

; Alzamora, Pedro Loures

; Silva, Daniel Victor F. da

; Ganem, Marcelo Augusto S

; Santos, Thiago H. M

; Carvalho, Anne I. R

; Souza, Leandro M. V

; Paixão, Gabriela P. F

; Chaves, Elisa França

; Santos, Guilherme Bezerra dos

; Santos, Rafael Vinícius dos

; Freitas, Amanda Cupertino de

; Flores, Matheus G

; Biezuner, Rachel F

; Cardoso, Rodolfo Lins

; Fonseca, Rodrigo Machado

; Silva, Ana Paula Couto da

; Meira Jr, Wagner

Brazilian Archives of Biology and Technology

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2022, Volume 65 elocation e22210648

Abstract: En | Text: En | PDF: En

Abstract: COVID-19 rapidly spread across the world in an unprecedented outbreak with a massive number of infected and fatalities. The pandemic was heavily discussed and searched on the internet, which generated big amounts of data related to it. This led to the possibility of attempting to forecast coronavirus indicators using the internet data. For this study, Google Trends statistics for 124 selected search terms related to pandemic were used in an attempt to find which keywords had the best Spearman correlations with a lag, as well as a forecasting model. It was found that keywords related to coronavirus testing among some others, such as “I have contracted covid”, had high correlations (≥0.7) with few weeks of lag (≤4 weeks). Besides that, the ARIMAX model using those keywords had promising results in predicting the increase or decrease of epidemiological indicators, although it was not able to predict their exact values. Thus, we found that Google Trends data may be useful for predicting outbreaks of coronavirus a few weeks before they happen, and may be used as an auxiliary tool in monitoring and forecasting the disease in Brazil.

https://doi.org/10.1590/1678-4324-2022210648

RANDOM FOREST MODEL TO PREDICT THE HEIGHT OF EUCALYPTUS
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Lima, Elizeu de S.

; Souza, Zigomar M. de

; Oliveira, Stanley R. de M.

; Montanari, Rafael

; Farhate, Camila V. V.

Engenharia Agrícola

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2022, Volume 42 N. spe elocation e20210153

Abstract: En | Text: En | PDF: En

ABSTRACT Eucalyptus (Eucalyptus urograndis) production has significantly advanced over the past few years in Brazil, especially with regard to acreage and productivity. Machine learning has made significant advances in most varied fields of agrarian sciences. In this context, this study aimed to use physicochemical variables of the soil as well as climatic and dendrometric variables of eucalyptus to predict its height using the random forest algorithm. The study was conducted in the municipality of Três Lagoas, in Mato Grosso do Sul, Brazil. The original database consisted of 49 soil physicochemical variables collected at 0–0.20 m and 0.20–0.40 m, two dendrometric and four climatic variables, and one response variable related to the height of eucalyptus. A correlation matrix was applied to select variables. Furthermore, modeling was performed using the random forest algorithm, which performed well (r = 0.98, R2 = 0.96) in predicting the height of eucalyptus. Overall, the most important variables to predict the eucalyptus plant height included diameter at breast height (DBH), phosphorus content (P1), gravimetric moisture (GM1) at a soil depth between 0.00 m and 0.20 m, and exchangeable aluminum content (Al2) between 0.20 m to 0.40 m of soil.

https://doi.org/10.1590/1809-4430-eng.agric.v42nepe20210153/2022

10.

Deterioração da superfície de cinco madeiras amazônicas expostas ao intemperismo natural
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Silva, Eldalisley dos Santos

; Júnior, Eraldo Antonio Bonfatti

; Silva, Gabriel Afonso de Oliveira

; Curvo, Kezia Rage

; Stangerlin, Diego Martins

; Melo, Rafael Rodolfo de

; Souza, Adilson Pacheco de

Madera y bosques

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2022, Volume 28 N. 2 elocation e2822405

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

Abstract Wood in civil construction has restrictions regarding its external use due to the actions of natural weathering, which can represent a real risk because they modify the characteristics of this material. This study aimed to evaluate the superficial deterioration of Trattinnickia rhoifolia (amescla), Parkia pendula (angelim), Erisma uncinatum (cedar), Apuleia leiocarpa (garapeira), and Mezilaurus itauba (itaúba) wood specimens exposed to natural weathering. For this purpose, wood samples were submitted to outdoor exposure on a metal platform, without contact with the ground, for 360 days. Every 60 days, the wood surface was characterized by colorimetry (L*, a*, b*, C*, h, and ΔE), roughness (Ra, Rz, and Rt), and hardness Rockwell. A darkened surface (grayish color) on the wood was observed after natural weathering, indicated by the decrease in the colorimetric parameters L*, a*, and b*. E. uncinatum wood presented the lowest values of the total color change (ΔE). In addition to the discoloration, weathered wood presented the highest values of surface roughness and the lowest values of Rockwell hardness due to the occurrence of surface cracks. A. leiocarpa and M. itauba woods presented greater stability of roughness and Rockwell hardness throughout the outdoor exposure.

Resumo A madeira na construção civil apresenta restrições quanto ao seu uso externo devido às ações do intemperismo natural, que podem representar um risco real pois modificam as características desse material. Neste estudo objetivou-se avaliar a deterioração da superfície das madeiras de Trattinnickia rhoifolia (Amescla), Parkia pendula (Angelim), Erisma uncinatum (Cedro), Apuleia leiocarpa (Garapeira) e Mezilaurus itauba (Itaúba) expostas ao intemperismo natural. Para tanto, amostras de madeira foram expostas às intempéries em uma plataforma metálica, sem contato com o solo, durante 360 dias. A cada 60 dias realizou-se a caracterização da superfície das madeiras por meio da colorimetria (L*, a*, b*, C*, h e ∆E), rugosidade (Ra, Rz e Rt) e dureza Rockwell. A exposição ao intemperismo natural tornou a superfície das madeiras mais escurecidas (coloração acinzentada), resultante da redução dos parâmetros colorimétricos L*, a* e b*. A madeira de E. uncinatum apresentou os menores valores de variação total da cor (∆E). Além da descoloração, as madeiras intemperizadas tornaram-se mais rugosas e com menor dureza Rockwell, devido à formação de fissuras superficiais. As madeiras de A. leiocarpa e M. itauba apresentaram maior estabilidade da rugosidade e da dureza Rockwell durante o período de exposição às intempéries.

https://doi.org/10.21829/myb.2022.2822405

11.

Seep hunting in the Santos Basin, Southwest Atlantic: sampling strategy and employed methods of the multidisciplinary cruise BIOIL 1
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Sumida, Paulo Y. G.

; Pellizari, Vivian H.

; Lourenço, Rafael A.

; Signori, Camila N.

; Bendia, Amanda G.

; Carrerette, Orlemir

; Nakamura, Fernanda M.

; Ramos, Raissa B.

; Bergamo, Gilberto

; Souza, Bruno H. M.

; Butarelli, Ana C. A.

; Passos, Júlia G.

; Dias, Rodolfo J. S.

; Maly, Mascimiliano

; Banha, Thomás N. S.

; Güth, Arthur Z.

; Soares, Luiza F.

; Perugino, Paula D. N.

; Santos, Felipe R.

; Santana, Frederico R.

; Mahiques, Michel M. de

Ocean and Coastal Research

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2022, Volume 70 Suppl. 2 elocation e22031

Abstract: En | Text: En | PDF: En

Abstract The continental margin off the southeastern Brazilian coast is punctuated by a series of geological-geomorphological features, such as subsurface saline diapirs and pockmarks at the seafloor interface, which evidence the abundant presence of oil and gas in the region. In several of these sites, hydrocarbons can be naturally released into the water column, areas are cold seep areas. These are marked by the presence of oil- and gas-dependent ecosystems, where specific organisms are able to fix carbon from hydrocarbon chemosynthesis. In addition, light hydrocarbon fluid flow through the sediment may build up authigenic carbonates that can be further colonized by cold-water corals, generating large carbonate mounds over geological time, normally positioned at the border of these pockmark features. The present work reports on a multidisciplinary oceanographic cruise carried out in the Santos Basin, SW Atlantic, to seek, map, and collect geological, chemical, and biological data from different deep-sea habitats. The cruise occurred in November 2019 on the R/V Alpha Crucis of the Oceanographic Institute of the University of São Paulo (IOUSP). We intended to discover and detail different geomorphological features, characterize free-living and symbiotic microorganisms, determine the chemosynthetic rates in relation to heterotrophic microbial production, and characterize the fauna and study their ecological and evolutionary links within and across ocean basins. All discoveries made during the cruise and their respective results will be presented separately in several papers that comprise this special volume.

https://doi.org/10.1590/2675-2824070.22077pygs

12.

COVID-19 in the Perioperative Period of Cardiovascular Surgery: the Brazilian Experience
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Gomes, Walter J.

; Rocco, Isadora

; Pimentel, Wallace S.

; Pinheiro, Aislan H. B.

; Souza, Paulo M. S.

; Costa, Luiz A. A.

; Teixeira, Marjory M. P.

; Ohashi, Leonardo P.

; Bublitz, Caroline

; Begot, Isis

; Moreira, Rita Simone L

; Hossne Jr, Nelson A.

; Vargas, Guilherme F.

; Branco, João Nelson R.

; Teles, Carlos A.

; Medeiros, Eduardo A. S.

; Sáfadi, Camila

; Rampinelli, Amândio

; Moratelli Neto, Leopoldo

; Rosado, Anderson Rosa

; Mesacasa, Franciele Kuhn

; Capriata, Ismael Escobar

; Segalote, Rodrigo Coelho

; Palmieri, Deborah Louize da Rocha Vianna

; Jardim, Amanda Cristina Mendes

; Vianna, Diego Sarty

; Coutinho, Joaquim Henrique de Souza Aguiar

; Jazbik, João Carlos

; Coutinho, Henrique Madureira da Rocha

; Kikuta, Gustavo

; Almeida, Zely Sant'Anna Marotti de

; Feguri, Gibran Roder

; Lima, Paulo Ruiz Lucio de

; Franco, Anna Carolina

; Borges, Danilo de Cerqueira

; Cruz, Felipe Ramos Honorato De La

; Croti, Ulisses Alexandre

; Borim, Bruna Cury

; Marchi, Carlos Henrique De

; Goraieb, Lilian

; Postigo, Karolyne Barroca Sanches

; Jucá, Fabiano Gonçalves

; Oliveira, Fátima Rosane de Almeida

; Souza, Rafael Bezerra de

; Zilli, Alexandre Cabral

; Mas, Raul Gaston Sanchez

; Bettiati Junior, Luiz Carlos

; Tranchesi, Ricardo

; Bertini Jr, Ayrton

; Franco, Leandro Vieira

; Fernandes, Priscila

; Oliveira, Fabiana

; Moraes Jr, Roberto

; Araújo, Thiago Cavalcanti Vila Nova de

; Braga, Otávio Penna

; Pedrosa Sobrinho, Antônio Cavalcanti

; Teixeira, Roberta Tavares Barreto

; Camboim, Irla Lavor Lucena

; Gomes, Eduardo Nascimento

; Reis, Pedro Horigushi

; Garcia, Luara Piovan

; Scorsioni, Nelson Henrique Goes

; Lago, Roberto

; Guizilini, Solange

Brazilian Journal of Cardiovascular Surgery

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dec 2021, Volume 36 N. 6 Pages 725 - 735

Abstract: En | Text: En | PDF: En

Abstract Introduction: We investigated the clinical course and outcomes of patients submitted to cardiovascular surgery in Brazil and who had developed symptoms/signs of coronavirus disease 2019 (COVID-19) in the perioperative period. Methods: A retrospective multicenter study including 104 patients who were allocated in three groups according to time of positive real time reverse transcriptase-polymerase chain reaction (RT-PCR) for the SARS-CoV-2 (severe acute respiratory syndrome coronavirus 2): group 1, patients who underwent cardiac surgery > 10 days after positive RT-PCR; group 2, patients with a positive RT-PCR within 10 days before or after surgery; group 3, patients who presented positive RT-PCR > 10 days after surgery. The primary outcome was mortality and secondary outcomes were postoperative complications, intensive care unit (ICU) length of stay, and postoperative days of hospitalization. Results: The three groups were similar with respect to age, the European System of Cardiac Operative Risk Evaluation score, and comorbidities, except hypertension. Postoperative complications and death were significantly higher in groups 2 and 3 than in group 1, and no significant difference between groups 2 and 3 was seen. Group 2 showed a high prevalence of surgery performed as an urgent procedure. Although no significant differences were observed in ICU length of stay, total postoperative hospitalization time was significantly higher in group 3 than in groups 1 and 2. Conclusion: COVID-19 affecting the postoperative period of patients who underwent cardiovascular surgery is associated with a higher rate of morbidity and mortality. Delaying procedures in RT-PCR-positive patients may help reduce risks of perioperative complications and death.

https://doi.org/10.21470/1678-9741-2021-0960

13.

Molecular Structure Studies on Allyl Sulfonamides: Synthesis, Theoretical Treatment and Evaluation of Biological Activity
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Rabello, Anderson S

; Rubinger, Mayura M. M

; Souza, Rafael A. C

; Guilardi, Silvana

; Lima, Guilherme F. de

; Tavares, Eder C

; Zanon, Édipo P

; Silva, Giovanna R. N

; Zambolim, Laércio

; Ellena, Javier

Journal of the Brazilian Chemical Society

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nov 2021, Volume 32 N. 11 Pages 2033 - 2046

Abstract: En | Text: En | PDF: En

Two series of allyl sulfonamides, prepared from Morita-Baylis-Hillman adducts and primary aromatic sulfonamides, were fully characterized. The Z configuration for the products derived from 2-[hydroxy(phenyl)methyl]acrylonitrile (1) and E configuration for those derived from methyl 2-[hydroxy(phenyl)methyl]acrylate (2) were confirmed by X-ray diffraction for one compound of each series (1e, 2f). Density functional theory calculations for all allyl sulfonamides agreed with the X-ray crystallographic data. X-ray diffraction studies indicate that these compounds form dimers in their crystal structures. Fingerprint plots show that compound 1e is stabilized by H⋯H, C⋯H/H⋯C, O⋯H/H⋯O and N⋯H/H⋯N interactions, while the compound 2f has no N⋯H/H⋯N contacts. Hirshfeld surface analyses were performed to gain insight into the behavior of these interactions. Calculated frontier orbitals showed that their highest occupied and lowest unoccupied molecular orbitals are antibonding orbitals. The allyl sulfonamides 1e and 2f are among the most active compounds in each series, inhibiting approximately 60% of the mycelial growth of Botrytiscinerea at 3 mmol L-1.

https://doi.org/10.21577/0103-5053.20210094 27 downloads

14.

Physico-mechanical properties of the wood of freijó, Cordia goeldiana (Boraginacea), produced in a multi-stratified agroforestry system in the southwestern Amazon
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MASCARENHAS, Adriano Reis Prazeres

; SCCOTI, Marta Silvana Volpato

; MELO, Rafael Rodolfo de

; CORRÊA, Fernando Luíz de Oliveira

; SOUZA, Emanuel Fernando Maia de

; PIMENTA, Alexandre Santos

Acta Amazonica

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jun 2021, Volume 51 N. 2 Pages 171 - 180

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

RESUMO Os sistemas agroflorestais (SAFs) integram, com práticas sustentáveis, culturas agrícolas e florestais para produção de madeira e alimentos, conservando os serviços ambientais e a biodiversidade. O freijó, Cordia goeldiana, tem potencial para cultivo na Amazônia para fins madeireiros, porém dados sobre as características de sua madeira em SAFs são escassas. Objetivou-se determinar as propriedades físico-mecânicas e aplicações tecnológicas da madeira de freijó produzida em um SAF multiestratificado estabelecido no estado de Rondônia, Brasil em 1996. No SAF, as espécies agrícolas e madeireiras foram estabelecidas em renques duplos no espaçamento 5,0 m x 2,5 m. Abateram-se três árvores de freijó com 19 anos de idade, para caracterização química, física (densidade e estabilidade dimensional) e mecânica (compressão, flexão estática, dureza Janka e cisalhamento) da madeira. A madeira de freijó apresentou composição química similar à de madeiras nobres tropicais, peso moderado (582,63 kg m-3) e estabilidade dimensional elevada em comparação com outras madeiras consagradas no mercado (retração longitudinal, radial e tangencial = 0,25, 4,27 e 6,83%, respectivamente). Os valores de resistência à compressão paralela (32,32 MPa) e perpendicular (8.02 MPa), resistência específica (55,32 MPa kg-1 m-3), dureza Janka paralela (2373,33 N) e perpendicular (2326,67 N), resistência à flexão estática (63,5 MPa) e ao cisalhamento (5,94 MPa) foram semelhantes aos valores observados em outras madeiras tropicais de alta densidade, produzidas em monocultivo e florestas naturais. A madeira em estudo é adequada para fabricação de produtos de alto valor agregado, como móveis finos, pisos residenciais, instrumentos musicais e peças estruturais.

ABSTRACT Agroforestry systems (AFSs) integrate, through sustainable practices, agricultural and forest crops for the production of wood and food, providing environmental services, and conserving biodiversity. The freijó (Cordia goeldiana) has potential for cultivation in the Amazon for timber purposes, but data on the characteristics of its wood produced in AFSs are scarce. Our objective was to determine the physical-mechanical properties and suggest technological applications of freijó wood produced in a multi-stratified AFS established in the state of Rondônia, Brazil in 1996. Agricultural and forest species were established in the AFS in double rows with 5.0-m x 2.5-m spacing. Three 19-year-old freijó trees were harvested for chemical, physical (density and dimensional stability), and mechanical (compression, static bending, Janka hardness, and shear strength) characterization of the wood. The wood presented a chemical composition similar to tropical hardwoods, was moderately heavy (582.63 kg m-3), and had high dimensional stability in comparison with other consecrated woods on the market (longitudinal, radial, and tangential retraction = 0.25, 4.27, and 6.83%, respectively). The values determined for parallel (32.32 MPa) and perpendicular compression (8.02 MPa), specific strength (55.32 MPa kg-1 m-3), parallel (2373.33 N) and perpendicular Janka hardness (2326.67 N), strength to static bending (63.5 MPa), and shear (5.94 MPa) were similar to the values observed in other high-density tropical woods grown in either monoculture plantations or natural forests. The wood under study is suitable for manufacture of high-value-added products, such as fine furniture, residential floors, musical instruments and structural pieces.

https://doi.org/10.1590/1809-4392202003001 583 downloads

15.

Synthesis, in silico Study and Antileishmanial Evaluation of New Selenides Derived from 7-Chloro-quinoline and N-Phenylacetamides
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Huang, Min-Fu N.

; Luis, José A. S.

; Silva, Alison P. da

; Rocha, Juliana C.

; Lima, Tatjana K. S.

; Scotti, Marcus T.

; Scotti, Luciana

; Oliveira, Rafael F. de

; Souza, Helivaldo D. S.

; Athayde-Filho, Petrônio F. de

; Barbosa-Filho, José M.

Journal of the Brazilian Chemical Society

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apr 2021, Volume 32 N. 4 Pages 712 - 721

Abstract: En | Text: En | PDF: En

This study describes a virtual screening performed for two series of selenides (28 compounds), derived from N-phenylacetamides chlorides and 7-chloro-quinoline, to determine their potential for leishmanicidal activity against Leishmania amazonensis and Leishmania donovani. Seven compounds were predicted as potential leishmanicides; therefore, they were synthesized from elemental selenium, as a precursor for the production of NaHSe, and subsequent reactions with 4,7-dichloro-quinoline and N-phenylacetamides chlorides were performed. The compounds were characterized by infrared (IR), 1H and 13C nuclear magnetic resonance (NMR), and sent for in vitro cytotoxicity tests against L. amazonensis and were found to be active and selective, and two compounds presented half-maximal inhibitory concentrations (IC50) of 5.67 and 10.81 µg mL-1. They also presented good interaction energies in the docking study, suggesting that may exert their effects by inhibiting the N-myristoyltransferase and O-acetylserine sulfhydrylase enzymes in parasites.

https://doi.org/10.21577/0103-5053.20200223 183 downloads

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