Búsqueda | SciELO

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

Long-term oncological and surgical outcomes after Video Endoscopic Inguinal Lymphadenectomy (VEIL) in patients with penile cancer
Facebook Twitter

Otras redes sociales
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Otras redes

Métrica
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Tobias-Machado, Marcos

; Ornellas, Antonio A.

; Hidaka, Alexandre K.

; Medina, Luis G.

; Mattos, Pablo A. L.

; Besio, Ruben S.

; Abreu, Diego

; Castro, Pedro R.

; Nishimoto, Ricardo H.

; Astigueta, Juan

; Dourado, Aurus

; Machado, Roberto D.

; Magnabosco, Wesley J.

; Corona-Montes, Victor

; Villoldo, Gustavo M.

; Zampolli, Hamilton C.

; Taha, Anis

; Auad, Pericles R.

; Faria, Eliney F.

; Arantes, Paulo B. O.

; Tavares, Alessandro

; Nascimento, Francisco S. M. S.

; Brazão Jr., Eder S.

; Rocha, Maurício M.

; Costa, Walter H.

; Panico, Vinicius

; Reis, Leonardo O.

; Almeida-Carrera, Roberto J.

; Silva, Rafael C.

; Zequi, Stênio C.

; Calixto, José R. R.

; Sotelo, Rene

International braz j urol

Métricas del periódico
- Sobre o periódico
- SciELO Analytics

Oct 2023, Volumen 49 Nº 5 Paginas 580 - 589

Resumen: En | Texto: En | PDF: En

ABSTRACT Objective: To report outcomes from the largest multicenter series of penile cancer patients undergoing video endoscopic inguinal lymphadenectomy (VEIL). Materials and Methods: Retrospective multicenter analysis. Authors of 21 centers from the Penile Cancer Collaborative Coalition-Latin America (PeC-LA) were included. All centers performed the procedure following the same previously described standardized technique. Inclusion criteria included penile cancer patients with no palpable lymph nodes and intermediate/high-risk disease and those with non-fixed palpable lymph nodes less than 4 cm in diameter. Categorical variables are shown as percentages and frequencies whereas continuous variables as mean and range. Results: From 2006 to 2020, 210 VEIL procedures were performed in 105 patients. Mean age was 58 (45-68) years old. Mean operative time was 90 minutes (60-120). Mean lymph node yield was 10 nodes (6-16). Complication rate was 15.7%, including severe complications in 1.9% of procedures. Lymphatic and skin complications were noted in 8.6 and 4.8% of patients, respectively. Histopathological analysis revealed lymph node involvement in 26.7% of patients with non-palpable nodes. Inguinal recurrence was observed in 2.8% of patients. 10y- overall survival was 74.2% and 10-y cancer specific survival was 84.8%. CSS for pN0, pN1, pN2 and pN3 were 100%, 82.4%, 72.7% and 9.1%, respectively. Conclusion: VEIL seems to offer appropriate long term oncological control with minimal morbidity. In the absence of non-invasive stratification measures such as dynamic sentinel node biopsy, VEIL emerged as the alternative for the management of non-bulky lymph nodes in penile cancer.

https://doi.org/10.1590/s1677-5538.ibju.2023.0065

Guía de práctica clínica para el manejo del cáncer de pulmón de células pequeñas: enfermedad limitada
Facebook Twitter

Otras redes sociales
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Otras redes

Métrica
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Cabrera-Miranda, Luis A.

; Lozano-Ruiz, Francisco J.

; Blake-Cerda, Mónika

; Corona-Cruz, José F.

; Sánchez-Reyes, Roberto

; Pérez-Álvarez, Sandra I.

; Díaz-García, Diego A.

; Álvarez-Bojórquez, Mario E.

; Rivera-Márquez, Raúl

; López-Saucedo, Raúl A.

; Bolaño-Guerra, Laura M.

; Maldonado-Magos, Federico

; Aldaco-Sarvide, Fernando

; Alvarado-Zermeño, Adriana

; Barajas-Figueroa, Luis J.

; Bautista-Aragón, Yolanda

; Bolaños-Morales, Francina V.

; Castillo-Ortega, Graciano

; Félix-Leyva, Jesús A.

; Gerson-Cwilich, Raquel

; Guzmán-de Alba, Enrique

; López-Galindo, Ángel A.

; Mariscal-Ramírez, Carlos

; Piñeiro-Retif, Rafael

; Ramos-Prudencio, Rubí

; Rodríguez-Cid, Jerónimo

; Silva-Bravo, Fernando

; Arrieta, Óscar

Gaceta mexicana de oncología

Métricas del periódico
- Sobre o periódico
- SciELO Analytics

Mar 2023, Volumen 22 Nº 1 Paginas 3 - 23

Resumen: Es En | Texto: Es En | PDF: Es | PDF: En

Resumen Antecedentes: El cáncer de células pequeñas (CPCP) representa el 13-15% del total de neoplasias primarias de pulmón. Se caracteriza por su rapidez en la tasa de crecimiento y en el desarrollo de metástasis a distancia. Objetivos: Orientar y estandarizar el tratamiento del CPCP, enfermedad limitada, en México, basado en evidencia clínica nacional e internacional. Material y métodos: Este documento se desarrolló como una colaboración entre el Instituto Nacional de Cancerología y la Sociedad Mexicana de Oncología en cumplimiento con estándares internacionales. Se integró un grupo conformado por oncólogos médicos, cirujanos oncólogos, cirujanos de tórax, radio-oncólogos y metodólogos con experiencia en revisiones sistemáticas de la literatura y guías de práctica clínica. Resultados: Se consensuaron, por el método Delphi y en reuniones a distancia, las recomendaciones en CPCP enfermedad limitada, producto de las preguntas de trabajo. Se identificó y evaluó críticamente la evidencia científica que responde a cada una de dichas preguntas clínicas, antes de incorporarla a la guía. Conclusión: Esta guía proporciona recomendaciones clínicas para el manejo de la enfermedad limitada del CPCP y durante el proceso de toma de decisiones de los clínicos involucrados con su manejo en nuestro país para mejorar la calidad de la atención clínica en estos pacientes.

Abstract Background: Small cell lung cancer (SCLC) represents 13-15% of all primary lung neoplasms and is characterized by rapid growth rate and development of distant metastases. Objectives: To guide and standardize the treatment of limited disease small cell lung cancer in Mexico based on national and international clinical evidence. Material and methods: This document was developed as a collaboration between the National Cancer Institute and the Mexican Society of Oncology in compliance with international standards. An interdisciplinary group was formed, including medical oncologists, oncological surgeons, thoracic surgeons, radiation oncologists, and methodologists with experience in systematic reviews of the literature and clinical practice guidelines. Results: Consensus recommendations were reached, both by the Delphi method and in remote meetings, for limited SCLC disease resulting from the same number of work questions. The scientific evidence that answers each of these clinical questions was identified and critically evaluated, before being incorporated into the body of evidence of the guide. Conclusion: This guide provides clinical recommendations for the management of limited disease SCLC to contribute to the decision-making process of the clinicians involved with its management in our country, hoping that this will contribute to improving the quality of clinical care in these patients.

https://doi.org/10.24875/j.gamo.22000121

Oceanographic conditions of the continental slope and deep waters in Santos Basin: the SANSED cruise (winter 2019)
Facebook Twitter

Otras redes sociales
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Otras redes

Métrica
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Silveira, Ilson C. A. da

; Bernardo, Piero S.

; Lazaneo, Cauê Z.

; Amorim, João P. M.

; Borges-Silva, Milton

; Martins, Rafael C.

; Santos, Daniel M. C.

; Dottori, Marcelo

; Belo, Wellington C.

; Martins, Renato P.

; Guerra, Luiz A. A.

; Moreira, Daniel L.

Ocean and Coastal Research

Métricas del periódico
- Sobre o periódico
- SciELO Analytics

2023, Volumen 71 Supl. 3 elocation e23008

Resumen: En | Texto: En | PDF: En

Abstract This work describes the circulation over the continental slope and the São Paulo Plateau in the Santos Basin during the SANSED winter 2019 survey. The cruise consisted of four legs in the period between June, 11 and August, 03 2019. The observed circulation is dominated by the Atlantic southwestern boundary current regime and remotely-generated anticyclones and cyclones. The former is composed by the Brazil Current, the Intermediate Western Boundary Current and their mesoscale meanders; the latter are 300km vortical rings with origin in the eastern side of the South Atlantic Basin. A Lagrangian scheme applied over satellite altimeter maps indicate that the origin of these rings is primarily the Cape Basin of South Africa. The interaction between the boundary currents, their cyclonic meanders, and the anticyclonic rings is complex, and varies widely. During the SANSED winter 2019 survey period, three anticyclones interacted with the Brazil Current, instabilizing it, forming dipoles with the current cyclonic meanders, leading to their downstream propagation. Ancienter cyclonic eddies within Santos Basin may interfere with the propagation of the large anticyclones further south. In addition, the continuous arrival of remotely-originated anticyclones, the larger portion over the São Paulo Plateau presented a tendency of counter-clockwise circulation during the whole cruise period.

https://doi.org/10.1590/2675-2824071.2206icas

Stabilization of β-Galactosidase Encapsulated in Pectin-Alginate Hydrogel and Hydrolysis of Whey Lactose and Whole Milk
Facebook Twitter

Otras redes sociales
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Otras redes

Métrica
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Paiva, Maykon J.

; Paula-Elias, Fabrício C.

; Pereira, Luciana A.

; Carreiro, Solange C.

; Vieira-Almeida, Erika C.

; Silva, Ezequiel M.

; Dias, Giancarlo S.

; Xavier, Michelle A. C.

; Morales, Sergio A.

; Perna, Rafael F.

; Almeida, Alex F.

Journal of the Brazilian Chemical Society

Métricas del periódico
- Sobre o periódico
- SciELO Analytics

2023, Volumen 34 Nº 12 Paginas 1743 - 1752

Resumen: En | Texto: En | PDF: En

The operational conditions of β-galactosidase encapsulated in pectin-alginate hydrogel were investigated as well as its catalytic activity in the hydrolysis of lactose from whey and whole milk. β-Galactosidase encapsulated in pectin-alginate hydrogel showed the best results to yields and diffusional effect and pH range. Thermostability showed considerable income gain for half-life (1.7-fold), activation energy of denaturation (31.6-fold), activation of denaturation (217.3-fold at 40 ºC; 266.8-fold at 50 ºC; 345.6-fold at 60 ºC), and entropy of activation of denaturation (-42.0 J mol 1 K-1). Reusability of encapsulated β-galactosidase was observed in 8-cycles for the milk whey lactose hydrolysis (51.9%) and 7-cycles for whole milk (55.6%), and the lactose hydrolysis was observed in 13% in milk whey and 10.3% in whole milk after 10 cycles. These results revealed an industrial application potential of β-galactosidase encapsulated in pectin-alginate hydrogel for lactose hydrolysis of milk whey and whole milk processes.

https://doi.org/10.21577/0103-5053.20230067

Deep sea ecosystem exploration and ‘health check’: sampling strategy and methods applied during the iAtlantic_BR10_Petrobras cruise in the Santos Basin, Southwest Atlantic
Facebook Twitter

Otras redes sociales
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Otras redes

Métrica
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

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

Métricas del periódico
- Sobre o periódico
- SciELO Analytics

2023, Volumen 71 elocation e23046

Resumen: En | Texto: 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

Multidisciplinary Scientific Cruises for Environmental Characterization in the Santos Basin – Methods and Sampling Design
Facebook Twitter

Otras redes sociales
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Otras redes

Métrica
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Moreira, Daniel L.

; Dalto, Adriana G.

; Figueiredo JR, Alberto G.

; Valerio, Aline M.

; Detoni, Amalia M. S.

; Bonecker, Ana C. T.

; Signori, Camila N.

; Namiki, Cláudia

; Sasaki, Dalton K.

; Pupo, Daniel V.

; Silva, Danilo A.

; Kutner, Deborah S.

; Duque-Castaño, Diana C.

; Marcon, Eduardo H.

; Gallotta, Fabiana D. C.

; Paula, Fabiana S.

; Gallucci, Fabiane

; Roque, Gabriela C. F.

; Campos, Giulia S.

; Fonseca, Gustavo

; Mattos, Gustavo

; Lavrado, Helena P.

; Silveira, Ilson C. A. da

; Costa, Jessica O.

; Santos Filho, João R. dos

; Carneiro, Juliane C.

; Moreira, Julio C.F.

; Rozo, Laura

; Araujo, Leandro F.M.

; Lazzari, Letícia

; Silva, Letícia O. da

; Michelazzo, Luan S.

; Fernandes, Luciano F.

; Dottori, Marcelo

; Araújo Jr., Marcus A. G. de

; Chuqui, Mateus G.

; Ceccopieri, Milena

; Borges-Silva, Milton

; Kampel, Milton

; Bergo, Natascha M.

; Silva, Paulo V. M.

; Tura, Pedro M.

; Moura, Rafael B. de

; Romano, Renato G.

; Martins, Renato P.

; Carreira, Renato S.

; Toledo, Rodrigo G.A.

; Bonecker, Sérgio L.C.

; Disaró, Sibelle T.

; Rodrigues, Silvana V.

; Corbisier, Thais N.

; Vicente, Thaisa M.

; Paiva, Vitor G. de

; Pellizari, Vivian H.

; Belo, Wellington C.

; Brandini, Frederico P.

; Sousa, Silvia H.M

Ocean and Coastal Research

Métricas del periódico
- Sobre o periódico
- SciELO Analytics

2023, Volumen 71 Supl. 3 elocation e23022

Resumen: En | Texto: En | PDF: En

Abstract The Santos Basin (SB) is the main petroliferous basin in the Brazilian continental margin and one of the most studied marine areas in Brazil. However, historical data suggest that new efforts should be carried out to acquire quantitative biological data, especially in the deep sea, to establish the baseline of essential ocean variables in different ecosystems for future monitoring programs. The Brazilian energy company Petrobras planned and executed 24 oceanographic cruises over a period of 2 years to assess the benthic (SANSED cruise) and pelagic (SANAGU cruise) systems of the SB (356 days at sea in 2019 and 2021/2022). These efforts were part of the Santos Project, which comprised a comprehensive environmental study aimed at investigating benthic and pelagic variables to characterize ecology, biogeochemistry, thermohaline properties of water masses, and ocean circulation patterns, geomorphology, and sedimentology, as well as organic and inorganic chemistry. Here we present the detailed sampling designs and the field methods employed on board, during the SB scientific cruises. All sampling protocols were based on standardized approaches. For the benthos analyses, triplicate sediment samples were performed using a GOMEX-type box corer (0.25 m²) or a large modified Van Veen grab (0.75 m²) at 100 stations ranging from 25 to 2400 m depth. At each station, 25 geochemical and physico-chemical parameters were analyzed in addition to micro-, meio-, and macrofauna and living foraminifera samples. For the pelagic system, 60 stations were selected to investigate the plankton community, ranging in size from pico- to macroplankton, through vertical, horizontal, and oblique net hauls (20, 200, and 500 μm mesh size), as well as 25 biogeochemical parameters collected with an aid of a CTD-rosette sampler. Part of this scientific information also serves the Regional Environmental Characterization Project (PCR-BS) in support of Petrobras’ Santos Basin drilling licensing process led by the Brazilian Environmental Agency – IBAMA. This project contributes to the sustainable development of the SB, in line with the guidelines of the United Nations Decade of Ocean Science for Sustainable Development.

https://doi.org/10.1590/2675-2824071.22072dlm

Tolerance of tomato seedling cultivars to different values of irrigation water salinity
Facebook Twitter

Otras redes sociales
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Otras redes

Métrica
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Oliveira, Carlos E. da S.

; Zoz, Tiago

; Jalal, Arshad

; Seron, Cassio de C.

; Silva, Rafael A. da

; Teixeira Filho, Marcelo C. M.

Revista Brasileira de Engenharia Agrícola e Ambiental

Métricas del periódico
- Sobre o periódico
- SciELO Analytics

Oct 2022, Volumen 26 Nº 10 Paginas 697 - 705

Resumen: Pt En | Texto: Pt En | PDF: Pt | PDF: En

RESUMO O uso de água salina na produção de mudas de hortaliças é uma questão de preocupação mundial, portanto, selecionar cultivares de tomate com tolerância à água salina é essencial para uma melhor qualidade e produção dos frutos. Este trabalho teve como objetivo estimar o nível máximo de salinidade da água de irrigação que não prejudique a produção de mudas de tomateiro e encontrar cultivares com tolerância aos efeitos da salinidade nesta fase. No primeiro experimento os tratamentos foram dispostos em esquema fatorial 3 × 8 (três cultivares de tomateiro foram cultivadas sob oito valores de condutividade elétrica da água de irrigação) e no segundo experimento em esquema fatorial 10 × 3 (com 10 cultivares e três valores de condutividade elétrica da água de irrigação). A redução de 50% no acúmulo de matéria seca radicular ocorreu com a condutividade elétrica da água de irrigação (CEa) de 2,31 dS m-1. A redução de mais de 50% do índice de qualidade de Dickson foi observada com CEa de 6,38 dS m-1. A irrigação com 3,0 dS m-1 prejudica a emergência e o crescimento de todas as plântulas das dez cultivares de tomateiro, sendo as cultivares Coração de Boi, Dominador, Maestrina, Sheena e Shanty as mais tolerantes a condições de irrigação salina com 3.0 dS m-1. A condutividade elétrica da água de irrigação superior a 2,31 dS m-1 prejudica o crescimento radicular de mudas de tomateiro.

ABSTRACT The use of water with different salinity values in the production of vegetable seedlings is an issue of global concern; therefore, selecting tomato cultivars with tolerance to saline water is essential to improve the fruit quality and production. This study aimed to estimate the maximum electrical conductivity of irrigation water that does not harm the production of tomato seedlings and find cultivars with tolerance to the effects of salinity in this phase. In the first experiment, the treatments were arranged in a 3 × 8 factorial scheme (three tomato cultivars and eight values of electrical conductivity of irrigation water). The second experiment was arranged in a 10 × 3 factorial scheme (10 cultivars and three values of electrical conductivity of irrigation water). The 50% reduction in the root dry matter accumulation occurred with the electrical conductivity of irrigation water (ECw) of 2.31 dS m-1. The reduction of more than 50% of the Dickson quality index was observed with an ECw of 6.38 dS m-1. Irrigation with 3.0 dS m-1 impairs the complete emergence and growth of seedlings of all tomato cultivars. Coração de Boi, Dominador, Maestrina, Sheena, and Shanty were the tomato cultivars most tolerant to the irrigation water with 3.0 dS m-1 of ECw. The electrical conductivity of irrigation water higher than 2.31 dS m-1 impairs the root growth of tomato seedlings.

https://doi.org/10.1590/1807-1929/agriambi.v26n10p697-705

Valorization of Hesperidin from Citrus Residues: Evaluation of Microwave-Assisted Synthesis of Hesperidin-Mg Complex and Their Insecticidal Activity
Facebook Twitter

Otras redes sociales
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Otras redes

Métrica
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Silva, Danielle F. da

; Bomfim, João P. A.

; Marchi, Rafael C.

; Amaral, Jéssica C.

; Pinto, Luciano S.

; Carlos, Rose M.

; Ferreira, Antonio G.

; Forim, Moacir R.

; Fernandes, João B.

; Silva, Maria F. G. F. da

; Oliveira, Regiane C. de

; Buss, David

; Kirk, William D. J.

; Bruce, Toby J. A.

Journal of the Brazilian Chemical Society

Métricas del periódico
- Sobre o periódico
- SciELO Analytics

Jul 2022, Volumen 33 Nº 7 Paginas 772 - 782

Resumen: En | Texto: En | PDF: En

The aim of the current study was the valorization of hesperidin, the dominant flavonoid in citrus processing waste, by microwave-assisted synthesis of hesperidin-Mg complex, improving its antioxidant activity and insecticidal potential. Here we show, for the first time, that microwave-assisted synthesis of [Mg(hesp)2(phen)]OAc (1) (hesp: hesperidin, phen: phenanthroline) improve the reaction rate and yield. The nuclear magnetic resonance (NMR) experiments proved to be powerful tools for the identification of three isomers in metal complexes. Moreover, we explore the insecticidal potential of 1 and [Mg(phen)2(Isov)]OAc (2) (Isov : isovanillic acid) complexes against three insects. Complex 1 killed 80% of adults whitefly at 0.14 μmol L-1, and 2 76% at 0.36 μmol L-1. There was a total mortality of Spodoptera frugiperda with 2 at 0.39 μmol L-1, and 83% with 1 at 0.14 μmol L-1. Both have similar activity, and represent a novel group of insecticide for Bemisia tabaci and S. frugiperda; nevertheless, the benefits of both as Myzus persicae repellent require further evaluation.

https://doi.org/10.21577/0103-5053.20220050

10.

Correlations between Web Searches and COVID-19 Epidemiological Indicators in Brazil
Facebook Twitter

Otras redes sociales
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Otras redes

Métrica
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

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

Métricas del periódico
- Sobre o periódico
- SciELO Analytics

2022, Volumen 65 elocation e22210648

Resumen: En | Texto: 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

11.

The 2019 northeast Brazil oil spill: scenarios
Facebook Twitter

Otras redes sociales
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Otras redes

Métrica
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

NOBRE, PAULO

; LEMOS, ANGELO T.

; GIAROLLA, EMANUEL

; CAMAYO, ROSIO

; NAMIKAWA, LAERCIO

; KAMPEL, MILTON

; RUDORFF, NATÁLIA

; BEZERRA, DIEGO X.

; LORENZZETTI, JOÃO

; GOMES, JORGE

; SILVA JR, MANOEL B. DA

; LAGE, CARLA P.M.

; PAES, RAFAEL L.

; BEISL, CARLOS

; LOBÃO, MÁRCIO M.

; BIGNELLI, PEDRO A.

; MOURA, NAJLA DE

; GALVÃO, WOUGRAN S.

; POLITO, PAULO S.

Anais da Academia Brasileira de Ciências

Métricas del periódico
- Sobre o periódico
- SciELO Analytics

2022, Volumen 94 elocation e20210391

Resumen: En | Texto: En | PDF: En

Abstract During the last quarter of 2019, the beaches, mangroves, and estuaries of Northeast Brazil received an unprecedented volume of crude oil from the sea, which became the worst environmental disaster ever to reach the Brazilian coast. The oil, having reached the shores completely unnoticed, left both society and government agents completely clueless on (i) where the oil was coming from; (ii) how much oil was still in the ocean to reach the shorelines; and (iii) which beaches were going to be affected next! By exploring remote sensing data and ocean numerical modeling, along with oil dispersion chemistry on sea water, this study investigates the possible origin and path of the spill and whether it could have been detected from space. The oil dispersion modeling simulations performed for this investigation revealed a possible region and timing of the oil spill, also indicating the likelihood of it being advected toward the shoreline under the ocean surface.

https://doi.org/10.1590/0001-3765202220210391

12.

Deterioração da superfície de cinco madeiras amazônicas expostas ao intemperismo natural
Facebook Twitter

Otras redes sociales
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Otras redes

Métrica
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

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

Métricas del periódico
- Sobre o periódico
- SciELO Analytics

2022, Volumen 28 Nº 2 elocation e2822405

Resumen: En Pt | Texto: 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

13.

Investigation of factors related to biofilm formation in Providencia stuartii
Facebook Twitter

Otras redes sociales
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Otras redes

Métrica
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

SILVA, SIVONEIDE M. DA

; RAMOS, BÁRBARA A.

; SÁ, RAFAEL A.Q.C. DE

; SILVA, MÁRCIA V. DA

; CORREIA, MARIA T.S.

; OLIVEIRA, MARIA B.M. DE

Anais da Academia Brasileira de Ciências

Métricas del periódico
- Sobre o periódico
- SciELO Analytics

2022, Volumen 94 Nº 3 elocation e20210765

Resumen: En | Texto: En | PDF: En

Abstract Providencia stuartii is one of the Enterobacteriaceae species of medical importance commonly associated with urinary infections, which can also cause other ones, including uncommon ones, such as liver abscess and septic vasculitis. This bacterium stands out in the expression of intrinsic and acquired resistance to antimicrobials. Besides, it uses mechanisms such as biofilm for its persistence in biotic and abiotic environments. This study investigated the cellular hydrophobicity profile of clinical isolates of P. stuartii. It also analyzed genes related to the fimbrial adhesin in this species comparing with other reports described for other bacteria from Enterobacteriaceae family. The investigated isolates to form biofilm and had a practically hydrophilic cell surface profile. However, fimH and mrkD genes were not found in P. stuartii, unlike observed in other species of Enterobacteriaceae. These results show that P. stuartii has specificities regarding its potential for biofilm formation, which makes it difficult to destabilize the infectious process and increases the permanence of this pathogen in hospital units.

https://doi.org/10.1590/0001-3765202220210765

14.

Botanical sources and heavy metals contents of honey produced by Apis mellifera in an ecotone region of the state of Bahia, Brazil
Facebook Twitter

Otras redes sociales
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Otras redes

Métrica
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

SILVEIRA-JÚNIOR, CRISTIANO EDUARDO A.

; LOPES, BIANCA A.

; SILVA, TÂNIA MARIA S.

; GOMES, AYALA NARA P.

; SILVA, GIRLIANE REGINA DA

; ARRUDA, RAFAEL S. DE

; MACIEL, EDSON A.

; SANTOS, FRANCISCO A.R. DOS

Anais da Academia Brasileira de Ciências

Métricas del periódico
- Sobre o periódico
- SciELO Analytics

2022, Volumen 94 Supl. 4 elocation e20211551

Resumen: En | Texto: En | PDF: En

Abstract The present study investigated by palynological and chemical analysis (Flame Atomic Absortion Spectrometry) about the botanical origin and the heavy metals content (arsenic, cadmium, chromium, lead and mercury) of monthly honey samples of Apis mellifera L. over two years. The pollen types Apiaceae, Mimosa caesalpiniifolia, M. tenuiflora and Myrcia indicated the main floristic sources used by bees. M. tenuiflora was the most frequent of the pollen types, and because it predominates in different months in each year, which may indicate more than one species of the genus being foraged by the beehive. The climatic influence (rainfall and temperature) on the pollen diversity was investigated and was not statistically supported. The chemical analysis showed that the heavy metal content of the samples were below their respective limits of quantification, and, therefore, the samples can be considered safe for human consumption.

https://doi.org/10.1590/0001-3765202220211551

15.

NOTES ON THE DISTRIBUTION OF BRASENIA SCHREBERI (CABOMBACEAE) IN THE NEOTROPICS, WITH A NEW COUNTRY RECORD FOR COSTA RICA
Facebook Twitter

Otras redes sociales
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Otras redes

Métrica
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Acuña-Castillo, Rafael

; Jiménez, José E.

; Bezerra-Silva, Luiz E.

; Gil-León, Jorge San

; Blanco, Mario A.

Darwiniana, nueva serie

Métricas del periódico
- Sobre o periódico
- SciELO Analytics

Dic 2021, Volumen 9 Nº 2 Paginas 364 - 374

Resumen: En Es | Texto: En Es | PDF: En | PDF: Es

Abstract Acuña-Castillo, R., J. E. Jiménez, L. E. Bezerra-Silva., J. San Gil-León & M. A. Blanco. 2021. Notes on the distribution of Brasenia schreberi (Cabombaceae) in the Neotropics, with a new country record for Costa Rica. Darwiniana, nueva serie 9(2): 364-374. We studied herbarium specimens of Brasenia schreberi from the Neotropics in order to describe the distribution pattern of the species across the region. Also, we report the first records of B. schreberi for Costa Rica. We confirm that B. schreberi has a sporadic pattern of distribution in the region and also in most neotropical countries where it has been collected. For this reason and because of its apparent disappearance from some localities, we recommend B. schreberi to be considered Vulnerable in the Neotropics.

Resumen Acuña-Castillo, R., J. E. Jiménez, L. E. Bezerra-Silva., J. San Gil-León & M. A. Blanco. 2021. Notas sobre la distribución de Brasenia schreberi (Cabombaceae) en el Neotrópico, con un nuevo registro para Costa Rica. Darwiniana, nueva serie 9(2): 364-374. Estudiamos especímenes de herbario de Brasenia schreberi recolectados en el Neotrópico para describir el patrón de distribución de la especie en la región. Además, registramos aquí por primera vez la presencia de B. schreberi en Costa Rica. Podemos confirmar que B. schreberi tiene un patrón de distribución esporádico en la región y también en la mayoría de los países neotropicales donde se ha recolectado. Por esta razón, y por su aparente desaparición de algunas localidades, recomendamos que B. schreberi se considere como Vulnerable en el Neotrópico.

https://doi.org/10.14522/darwiniana.2021.92.988 12 descargas

Mostrar

itens por página

Página de 7 Próxima

Seleccione uno o más resultados

Todos Ordem alfabética

Resultados

Gráfico comparativo Descargar CSV

Visualizar estadísticas de

Enviar resultado

E-mail do(s) destinatário(s)*

Utilize ; (punto y coma) para más de un correo.

Enviar por correo-e

Esta página

Registros seleccionados

Todas las referencias (max. 300)

Su email

Asunto

Comentarios

Formato de exportación:

RIS (para EndNote, ProCite, Reference Manager, RefWorks, Citavi, etc.)

BibTeX

Citación

CSV (para Excel, etc)

Exportar:

Esta página

Itens seleccionados

Todas las referencias (max. 2000)

Sem resultados

No se encontraron documentos para su búsqueda

Glosario y ayuda para la búsqueda

Ud. puede enriquecer su búsqueda de una forma muy sencilla. Use los índices de búsqueda combinados con los conectores (AND u OR) para especificar su busca.

Por ejemplo, si desea buscar artículos acerca de
casos de dengue en el Brasil en 2015, use:
ti:dengue and publication_year:2015 and aff_country:Brasil

A continuación se muestra la lista completa de los índices de búsqueda que se pueden utilizar:

Cód. del Índice	Elemento
ti	título del articulo
au	autor
kw	palabras clave del artículo
subject	asunto (palabras del título, resumen y palabras clave)
ab	resumen
ta	título abreviado de la revista (ej. Cad. Saúde Pública)
journal_title	título completo de la revista (ej. Cadernos de Saúde Pública)
la	código de idioma de publicación (ej. pt - Portugués, es - Español)
type	tipo de documento
pid	identificador de la publicación
publication_year	año de publicación del artículo
sponsor	financiador
aff_country	código del país de la afiliación del autor
aff_institution	institución de filiación del autor
volume	volumen del artículo
issue	número del artículo
elocation	elocation
doi	número DOI
issn	ISSN de la revista
in	código de la colección SciELO (ej. scl - Brasil, col - Colômbia)
use_license	código de licencia de uso del artículo

SciELO - Scientific Electronic Library Online
Rua Dr. Diogo de Faria, 1087 – 9º andar – Vila Clementino 04037-003 São Paulo/SP - Brasil
Email: scielo@scielo.org

Todo el contenido de este sitio www.scielo.br, excepto dónde está identificado, está bajo una Licencia de Atribución Creative Commons.
sepa más »