Pesquisa | SciELO

ABSTRACT The expression ‘you need to know to conserve’ is a well-known cliche among biologists. Documenting the richness of a group of organisms is the first step towards understanding biodiversity and preparing efficient conservation plans. In this context, many efforts have been made to quantify the number of species on Earth and estimate the number of species still unknown to science. A few countries have complete and integrated databases estimating the approximate number of species recorded for their territory, particularly in the Global South. In Brazil, a country of continental dimensions, revealing the richness of the second most diverse clade of invertebrates (=Mollusca) has been a goal of taxonomists. Recently, in an unprecedented, collective, and integrated effort among Brazilian malacologists, it was possible to estimate how many valid species of molluscs are there in Brazil. In this effort, more than 30 mollusc experts joined together to update the Taxonomic Catalogue of the Brazilian Fauna (TCBF), a governmental website that allows a quick and real-time updating of all Metazoan. So far, more than 5,000 updates have been made in TCBF, indicating the presence of 3,552 valid species of molluscs in Brazil, distributed among the main clades as follows: Caudofoveata (10 spp.), Solenogastres (6 spp.), Polyplacophora (35 spp.), Scaphopoda (43 spp.), Cephalopoda (92 spp.), Bivalvia (629 spp.) and Gastropoda (2,737 spp.). The present study, in addition to demonstrating for the first time the richness of Brazilian molluscs, also presents the state of the art of this important phylum of invertebrates highlighting its most representative and neglected groups.

https://doi.org/10.1590/s1984-4689.v40.e23026

SARS-CoV-2 infection and COVID-19 and human reproduction – A changing perspective - A 2022 update
Facebook Twitter

Outras redes sociais
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Outras redes

Métricas
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Delamuta, Luciana C.

; Monteleone, Pedro A.A.

; Ferreira-Filho, Edson S.

; Heinrich-Oliveira, Vanessa

; Soares-Júnior, José Maria

; Baracat, Edmund C.

; Maciel, Gustavo Arantes Rosa

Clinics

Métricas do periódico
- Sobre o periódico
- SciELO Analytics

2023, Volume 78 elocation 100166

Resumo: En | Texto: En | PDF: En

https://doi.org/10.1016/j.clinsp.2023.100166

Serological frequency of Leptospira spp. in buffaloes (Bubalus bubalis) in Paraná state, Brazil
Facebook Twitter

Outras redes sociais
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Outras redes

Métricas
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Krueger, Louise

; Biondo, Alexander W.

; Kmetiuk, Louise B.

; Lara, Maria do Carmo C.S.H.

; Castro, Vanessa

; Dib, Cristina C.

; Oliveira, Rodrigo A.M.

; Perotta, João H.

; Barros Filho, Ivan R.

Pesquisa Veterinária Brasileira

Métricas do periódico
- Sobre o periódico
- SciELO Analytics

2023, Volume 43 elocation e07147

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

ABSTRACT: Leptospirosis is a zoonosis that can infect buffaloes and other mammalians, and it’s caused by Gram-negative bacteria of the genus Leptospira spp. The infection occurs through contact with urine or a contaminated environment with the mucous membranes of the animals, and the disease has two phases: leptospiremia and leptospiruria. The objective of this study was to determine the frequency of leptospirosis in buffaloes in the state of Paraná, Brazil, as well as the main serovars present in this area. A total of 276 blood samples were collected from buffaloes from 18 properties located in different cities and mesoregions of Paraná state. A microscopic agglutination test (MAT) was performed to detect the presence of anti-Leptospira spp. antibodies and to identify its serovars. The prevalence was 77.17% (213/276) of buffaloes seropositive for at least one serovar. The most frequent serovar was Icterohaemorrhagiae, followed by the Pomona serovar and serovar Hardjo. This study seems to be the first to determine the frequency of buffaloes with leptospirosis in the state of Paraná. Prevention and control measures are important to control the disease in herds.

RESUMO: Leptospirose é uma zoonose que infecta búfalos e outros mamíferos e é causada por bactérias Gram-negativas do gênero Leptospira spp. A infecção ocorre por meio do contato com a urina ou ambiente contaminado com as membranas mucosas dos animais e a doença possui duas fases: leptospiremia e leptospirúria. O objetivo deste trabalho foi determinar a frequência da leptospirose em bubalinos provenientes do estado do Paraná, assim como determinar os principais sorovares presentes no estado. Um total de 276 amostras de sangue foram coletados de búfalos provenientes de 18 propriedades localizadas em 14 municípios de diferentes mesorregiões do estado do Paraná. O teste de soroaglutinação microscópica (SAM) foi realizado para detecção da presença de anticorpos anti-Leptospira spp. e identificação dos respectivos sorovares. A prevalência de búfalos soropositivos para ao menos um sorovar foi de 77,17% (213/276). O sorovar mais frequente identificado nestes búfalos foi o Icterohaemorrhagiae, seguido pelos sorovares Pomona e Hardjo. Este é o primeiro estudo a determinar a frequência de búfalos com leptospirose no estado do Paraná. Medidas de controle e prevenção são importantes para o controle do agente nos rebanhos.

https://doi.org/10.1590/1678-5150-pvb-7147

Sintomas Cardiopulmonares Pós-COVID-19: Preditores e Características de Imagem de Pacientes após a Alta Hospitalar
Facebook Twitter

Outras redes sociais
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Outras redes

Métricas
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Roberto, Kalil-Filho

; Saretta, Roberta

; Franci, André

; Baracioli, Luciano M.

; Galas, Filomena R. B. G.

; Gil, Juliana S.

; Ferino, Amanda

; Giacovone, Camilla

; Oliveira, Isabella

; Souza, Johnatan

; Batista, Vanessa

; Scalabrini Neto, Augusto

; Costa, Livia do Valle

; Ruiz, Amanda Danieleto

; Ledo, Carla B.

; Nascimento, Teresa Cristina D. C.

; Drager, Luciano F.

Arquivos Brasileiros de Cardiologia

Métricas do periódico
- Sobre o periódico
- SciELO Analytics

2023, Volume 120 Nº 5 elocation e20220642

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

Abstract Background Most of the evidence about the impact of the post-acute COVID-19 Syndrome (PACS) reports individual symptoms without correlations with related imaging. Objectives To evaluate cardiopulmonary symptoms, their predictors and related images in COVID-19 patients discharged from hospital. Methods Consecutive patients who survived COVID-19 were contacted 90 days after discharge. The Clinic Outcome Team structured a questionnaire evaluating symptoms and clinical status (blinded for hospitalization data). A multivariate analysis was performed to address the course of COVID-19, comorbidities, anxiety, depression, and post-traumatic stress during hospitalization, and cardiac rehabilitation after discharge. The significance level was set at 5%. Results A total of 480 discharged patients with COVID-19 (age: 59±14 years, 67.5% males) were included; 22.3% required mechanical ventilation. The prevalence of patients with PACS-related cardiopulmonary symptoms (dyspnea, tiredness/fatigue, cough, and chest discomfort) was 16.3%. Several parameters of chest computed tomography and echocardiogram were similar in patients with and without cardiopulmonary symptoms. The multivariate analysis showed that PACS-related cardiopulmonary-symptoms were independently related to female sex (OR 3.023; 95% CI 1.319-6.929), in-hospital deep venous thrombosis (OR 13.689; 95% CI 1.069-175.304), elevated troponin I (OR 1.355; 95% CI 1.048-1.751) and C-reactive protein during hospitalization (OR 1.060; 95% CI 1.023-1.097) and depression (OR 6.110; 95% CI 2.254-16.558). Conclusion PACS-related cardiopulmonary symptoms 90 days post-discharge are common and multifactorial. Beyond thrombotic and markers of inflammation/myocardial injury during hospitalization, female sex and depression were independently associated with cardiopulmonary-related PACS. These results highlighted the need for a multifaceted approach targeting susceptible patients.

Resumo Fundamento A maioria da evidência sobre o impacto da síndrome COVID pós-aguda (PACS, do inglês, post-acute COVID-19 syndrome) descreve sintomas individuais sem correlacioná-los com exames de imagens. Objetivos Avaliar sintomas cardiopulmonares, seus preditores e imagens relacionadas em pacientes com COVID-19 após alta hospitalar. Métodos Pacientes consecutivos, que sobreviveram à COVID-19, foram contatados 90 dias após a alta hospitalar. A equipe de desfechos clínicos (cega quanto aos dados durante a internação) elaborou um questionário estruturado avaliando sintomas e estado clínico. Uma análise multivariada foi realizada abordando a evolução da COVID-19, comorbidades, ansiedade, depressão, e estresse pós-traumático durante a internação, e reabilitação cardíaca após a alta. O nível de significância usado nas análises foi de 5%. Resultados Foram incluídos 480 pacientes (idade 59±14 anos, 67,5% do sexo masculino) que receberam alta hospitalar por COVID-19; 22,3% necessitaram de ventilação mecânica. A prevalência de pacientes com sintomas cardiopulmonares relacionados à PACS (dispneia, cansaço/fadiga, tosse e desconforto no peito) foi de 16,3%. Vários parâmetros de tomografia computadorizada do tórax e de ecocardiograma foram similares entre os pacientes com e sem sintomas cardiopulmonares. A análise multivariada mostrou que sintomas cardiopulmonares foram relacionados de maneira independente com sexo feminino (OR 3,023; IC95% 1,319-6,929), trombose venosa profunda durante a internação (OR 13,689; IC95% 1,069-175,304), nível elevado de troponina (OR 1,355; IC95% 1,048-1,751) e de proteína C reativa durante a internação (OR 1,060; IC95% 1,023-1,097) e depressão (OR 6,110; IC95% 2,254-16,558). Conclusão Os sintomas cardiopulmonares relacionados à PACS 90 dias após a alta hospitalar são comuns e multifatoriais. Além dos marcadores trombóticos, inflamatórios e de lesão miocárdica durante a internação, sexo feminino e depressão foram associados independentemente com sintomas cardiopulmonares relacionados à PACS. Esses resultados destacaram a necessidade de uma abordagem multifacetada direcionada a pacientes susceptíveis.

https://doi.org/10.36660/abc.20220642

Germination and vigor of watermelon seeds treated with biostimulant
Facebook Twitter

Outras redes sociais
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Outras redes

Métricas
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Oliveira, Silvia S. C. de

; Sousa, João F. G.

; Cruz, Sihélio J. S.

; Ponciano, Vanessa de F. G.

; Bottega, Daline B.

Revista Caatinga

Métricas do periódico
- Sobre o periódico
- SciELO Analytics

2023, Volume 36 Nº 4 Páginas 971 - 979

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

ABSTRACT Direct sowing is the most used watermelon propagation method in Brazil. Therefore, the use of treated seeds is an alternative for improving uniformity of plant stands at planting. Thus, the objective of this study was to assess the effects of seed treatments with biostimulant on the germination and vigor of watermelon [Citrullus lanatus (Thunb.) Matsum & Nakai] seeds of the cultivar Crimson Sweet. A completely randomized experimental design with four replications was used. The seed treatments consisted of six biostimulant (Agressive Desperta®) rates (0, 1, 2, 3, 4, and 5 mL kg-1). Seed germination speed index, seedling length, seedling dry weight, seedling emergence in the field, and seedling emergence speed index were evaluated. The treatment of watermelon seeds with biostimulant resulted in increases in seed germination speed and seedling length and dry weight as the biostimulant rate was increased. Seedling percentage and emergence speed increased up to the rate of 3 mL kg-1 under field conditions; however, application of higher rates resulted in phytotoxicity.

RESUMO No Brasil, a semeadura direta, é o mais utilizado na propagação de melancia. Para tanto, o uso de sementes tratadas surge como uma alternativa para melhoria da uniformidade de estandes no plantio. Dessa forma, objetivou-se verificar os efeitos do tratamento com estimulante de crescimento em sementes de melancia (Citrullus lanatus (Thunb.) Matsum & Nakai), cultivar Crimson Sweet, sobre a germinação e o vigor. O delineamento experimental utilizado foi o inteiramente casualizado, com quatro repetições e seis doses do estimulante de crescimento, Agressive Desperta®, 0; 1; 2; 3; 4 e 5 mL kg-1 de sementes de melancia. Avaliou-se a germinação, índice de velocidade de germinação, comprimento das plântulas, massa seca das plântulas, emergência de plântulas em campo e índice de velocidade de emergência de plântulas. O tratamento de sementes de melancia com estimulante de crescimento proporcionou maior velocidade de germinação, comprimento e massa seca de plântulas, diretamente proporcional ao aumento das dosagens. Em condições de campo, houve melhora na porcentagem e velocidade de emergência das plântulas até a dosagem de 3 mL kg-1 de sementes. Dosagens superiores a essa ocasionaram fitotoxidez.

https://doi.org/10.1590/1983-21252023v36n424rc

Morphocultural and pathogenic characterization of Colletotrichum gossypii and Colletotrichum gossypii var. cephalosporioides under different temperatures
Facebook Twitter

Outras redes sociais
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Outras redes

Métricas
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Oliveira, Mônica D. de M.

; Almeida, Vanessa C. de

; Araújo, Alderi E. de

; Nascimento, Luciana C. do

Revista Brasileira de Engenharia Agrícola e Ambiental

Métricas do periódico
- Sobre o periódico
- SciELO Analytics

Jun 2022, Volume 26 Nº 6 Páginas 420 - 424

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

RESUMO Considerando a importância da identificação de espécies de Colletotrichum associadas à cultura do algodoeiro, objetivou-se realizar a caracterização morfológica e patogênica de isolados de Colletotrichum gossypii var. cephalosporioides e de Colletotrichum gossypii submetidos a diferentes temperaturas. Foram utilizados cinco isolados de C. gossypii var. cephalosporioides e cinco isolados de C. gossypii, os quais foram incubados a 20, 25 e 30 °C. Os dados de caracterização cultural foram submetidos à análise de variância e comparados pelo teste de Tukey. Houve diferenças entre os isolados em relação ao crescimento micelial e esporulação das duas espécies nas diferentes temperaturas. As temperaturas de 20 e 30 °C aumentaram o comprimento dos conídios, mas não influenciaram na largura, enquanto a 25 e 30 °C houve maior crescimento micelial. Coletotrichum gossypii expressou sintomas de antracnose, enquanto sintomas de ramulose foram observados apenas em plantas inoculadas com C. gossypii var. cephalosporioides.

ABSTRACT Considering the importance of identifying Colletotrichum species associated with cotton plants, this study aimed to characterize the morphological and pathogenic isolates of C. gossypii var. cephalosporioides and C. gossypii under different temperatures. Five isolates of C. gossypii var. cephalosporioides and C. gossypii were incubated at 20, 25 and 30 °C. The cultural characteristics data were analyzed through ANOVA and the means compared by the Tukey test. There were differences between the isolates of the two species concerning mycelial growth and sporulation at different temperatures. Temperatures between 20 to 30 °C increased the length of conidia but did not influence the width, whereas between 25 and 30 °C, there was the highest mycelial growth. Colletotrichum gossypii expressed anthracnose symptoms, and ramulosis symptoms were observed only in plants inoculated with C. gossypii var. cephalosporioides.

https://doi.org/10.1590/1807-1929/agriambi.v26n6p420-424

Anticandidal Activity of Hydroalcoholic Extract of Phyllanthus niruri L. (Stone-Breaker)
Facebook Twitter

Outras redes sociais
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Outras redes

Métricas
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Maia, Flávia Camila

; Wijesinghe, Gayan Kanchana

; Barbosa, Janaína Priscila

; Feiria, Simone Nataly Busato de

; Oliveira, Thais Rossini

; Boni, Giovana Claudia

; Jóia, Felipe

; Cardoso, Vanessa da Silva

; Franco, Valéria Alessandra Prado Defávari

; Anibal, Paula Cristina

; Höfling, José Francisco

Brazilian Archives of Biology and Technology

Métricas do periódico
- Sobre o periódico
- SciELO Analytics

2022, Volume 65 elocation e22210539

Resumo: En | Texto: En | PDF: En

Abstract Candida is becoming more resistant to conventional treatments, and causes persistent and severe infections. This study evaluates the antifungal and virulence activities of the hydroalcoholic extract of Phyllanthus niruri (HE-Pn) on Candida. HE-Pn was prepared by maceration technique. Chemical composition of HE-Pn was determined using Gas Chromatography-Mass Spectrometry (GS-MS). Antifungal screening was done using agar well diffusion. CLSI M27-A3 was used to determine the Minimum Inhibitory (MIC) and Fungicidal Concentrations (MFC). Effects of HE-Pn on adhesion and germ tube of C. albicans (ATCC MYA-2876) were determined using XTT assay and germ tube formation assay, respectively. Transmission Electron Microscopy (TEM) was performed to visualize the post-exposure cellular changes. HE-Pn cytotoxicity was determined using human keratinocyte cell line (HaCaT). Chlorhexidine digluconate (2 mg/mL) was used as the positive control. Linolenic acid ethyl ester was the most abundant chemical component of HE-Pn. All strains tested were sensitive to HE-Pn. MIC were 0.03 - 8 mg/mL and MFC were 0.5 - 64 mg/mL for all test strains. C. albicans (ATCC MYA-2876) showed 50% of adhesion reduction with > 4 mg/mL of HE-Pn and germ-tube formation was inhibited with 0.25 and 2 mg/mL. TEM exhibited cytoplasmic granulation, intracellular vacuoles, detachment of cell wall and plasma membrane and chromatin condensation of Candida. No toxicity of HE-Pn was noted on HaCaT cells. HE-Pn shows an anti-Candida activity and can be used as an inhibitory agent against adhesion and germ tube formation of Candida albicans (ATCC MYA-2876) without causing any toxicity to human cells.

https://doi.org/10.1590/1678-4324-2022210539

Temporal genetic structure of a stock of Prochilodus lineatus (Characiformes: Prochilodontidae) in the Mogi-Guaçu River ecosystem, São Paulo, Brazil
Facebook Twitter

Outras redes sociais
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Outras redes

Métricas
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Rosa, Ivana F. da

; Oliveira, Daniela J. de

; Cruz, Vanessa P. da

; Ashikaga, Fernando Y.

; Costa, Gabriela Omura

; Doretto, Lucas B.

; Senhorini, José A.

; Rocha, Rita de C.

; Foresti, Fabio P.

; Oliveira, Claudio

; Foresti, Fausto

Neotropical Ichthyology

Métricas do periódico
- Sobre o periódico
- SciELO Analytics

2022, Volume 20 Nº 2 elocation e210156

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

Resumo Prochilodus lineatus é uma espécie de peixe migratório amplamente distribuído na bacia do rio Paraná, principalmente nos rios Grande, Pardo e Mogi-Guaçu localizados em uma região bem desenvolvida do estado de São Paulo. Este estudo analisou a diversidade genética e a estrutura populacional em cardumes de P. lineatus com base na análise temporal de espécimes amostrados ao longo dos anos de 2003, 2005, 2006, 2009, 2010 e 2015 na Cachoeira de Emas no rio Mogi-Guaçu, São Paulo, Brasil. A análise genética realizada com o marcador D-Loop e sete microssatélites revelou variabilidade genética significativa em todos os grupos amostrados. Níveis moderados de estruturação entre os grupos foram identificados com os marcadores microssatélites (Fst = 0.14), enquanto o marcador mitocondrial não revelou padrões de estruturação genética (Fst = 0.01). A variabilidade genética identificada no estoque oscilou ao longo do tempo, caracterizando padrões de estruturação entre as amostras analisadas. A ocorrência de alterações ambientais resultando em aumento das taxas de mortalidade, bem como mudanças no nível de água no ecossistema, entre outros fatores, podem determinar mudanças no comportamento reprodutivo das espécies. A falta de condições ambientais favoráveis para a reprodução na bacia, pode ter resultado na diferenciação das populações de P. lineatus ao longo do tempo.

Abstract Prochilodus lineatus is a species of migratory fish widely distributed in the Paraná River basin, found mainly in the Grande, Pardo and Mogi-Guaçu rivers located in a well-developed region of the state of São Paulo. This study analyzes the genetic diversity and population structure in shoals of P. lineatus based on temporal analysis of specimens sampled over the years 2003, 2005, 2006, 2009, 2010, and 2015 in the Mogi-Guaçu River, São Paulo, at the region of Cachoeira de Emas. Genetic analysis performed using the D-Loop and seven microsatellite marker revealed significant genetic variability in all sampled groups. Moderate levels of structuring between groups were identified with the microsatellite markers (Fst = 0.14), while the mitochondrial marker did not reveal patterns of genetic structuring (Fst = 0.01). The genetic variability fluctuated over time, characterizing patterns of structuring among the analyzed samples. The occurrence of environmental alterations resulting in increased mortality rates, as well as changes in the water level in the ecosystem, among other factors, could determine changes in the reproductive behavior of species. The lack of favorable environmental conditions for reproduction in the basin, as reflected by tests of population bottlenecks, could have resulted in the differentiation of populations of P. lineatus over time.

https://doi.org/10.1590/1982-0224-2021-0156

10.

Associação Positiva entre Autoanticorpos contra LDL Oxidada e HDL-C: Um Novo Mecanismo para Cardioproteção de HDL?
Facebook Twitter

Outras redes sociais
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Outras redes

Métricas
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Nunez, Carla Evelyn Coimbra

; Oliveira, Joaquim Barreto

; Barros-Mazon, Silvia de

; Zago, Vanessa H. S.

; Kaplan, Denise Beheregaray

; Nakamura, Ruy T.

; Gidlund, Magnus Ake

; Gomes, Erica I. L.

; Cazita, Patricia Miralda

; Nakandakare, Edna

; Carmo, Helison R.

; Sposito, Andrei C.

; Faria, Eliana Cotta de

Arquivos Brasileiros de Cardiologia

Métricas do periódico
- Sobre o periódico
- SciELO Analytics

2022, Nº ahead

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

Resumo Fundamento No microambiente da placa aterosclerótica, os fosfolipídios oxidados expressos na superfície de lipoproteína de baixa densidade oxidada (oxLDL) se ligam a receptores scavenger em macrófagos provocando a formação de células espumosas e a progressão da placa. Autoanticorpos contra oxLDL (oxLDL-Ab) interagem com epítopos oxidativos levando à formação de imunocomplexos que são incapazes de interagir com receptores de macrófagos, assim suprimindo a aterogênese. A liberação de oxLDL-Ab pelas células B envolve a resposta da interleucina 5 e Th2, que por sua vez são potencializadas pela HDL. Assim, levantamos a hipótese de que indivíduos com níveis mais altos de HDL-C podem apresentar níveis elevados de oxLDL-Ab. Objetivo Avaliar a relação entre os níveis de HDL-C e oxLDL-Ab. Métodos Indivíduos assintomáticos (n = 193) foram agrupados de acordo com sua concentração de HDL-C para uma das três categorias seguintes: baixa (< 68 mg/dL), intermediária (de 68 a 80 mg/dL) ou alta (> 80 mg/dL). Os valores p < 0,05 foram considerados estatisticamente significativos. Resultados Nossa análise incluiu 193 indivíduos (média etária: 47 anos; masculino: 26,3%). Em comparação com os indivíduos no menor tercil de HDL-C, os mais elevados foram mais velhos (36 versus 53 anos; p = 0,001) e, menos frequentemente, masculinos (42,6% versus 20,9%; p = 0,001). Os valores médios de oxLDL-Ab aumentaram à medida que o grupo HDL-C aumentou (0,31, 0,33 e 0,43 unidades, respectivamente; p = 0,001 para tendência). A regressão linear simples encontrou uma relação significativa e positiva entre a variável independente, HDL-C, e a variável dependente, oxLDL-Ab (R = 0,293; p = 0,009). Essa relação manteve-se significativa (R = 0,30; p = 0,044), após ajuste por covariáveis. Os níveis de apolipoproteína AI também estiveram relacionados a oxLDL-Ab nos modelos de regressão linear simples e ajustada. Conclusões HDL-C e oxLDL-Ab estão independentemente relacionados.

Abstract Background In the atherosclerotic plaque microenvironment, oxidized phospholipids expressed in the oxidized low-density lipoprotein (oxLDL) surface bind to scavenger receptors of macrophages eliciting foam cell formation and plaque progression. Auto-antibodies against oxLDL (oxLDL-Ab) interact with oxidative epitopes leading to the formation of immune complexes that are unable to interact with macrophage receptors, thus abrogating atherogenesis. Release of oxLDL-Ab by B cells involves interleukin 5 and Th2 response, which in turn are potentiated by HDL. Thereby, we hypothesized that individuals with higher levels of HDL-C may plausibly display elevated titers of oxLDL-Ab. Objective To evaluate the relationship between HDL-C and oxLDL-Ab levels. Methods Asymptomatic individuals (n = 193) were grouped according to their HDL-C concentration to one of three categories: low (< 68 mg/dL), intermediate (68 to 80 mg/dL) or high (> 80 mg/dL). P values < 0.05 were considered statistically significant. Results Our analysis included 193 individuals (mean age: 47 years; male: 26.3%). Compared to individuals in the lowest HDL-C tertile, those in the highest tertile were older (36 versus 53 years; p = 0.001) and less frequently male (42.6% versus 20.9%; p = 0.001). Mean values of oxLDL-Ab increased as the HDL-C group escalated (0.31, 0.33 and 0.43 units, respectively; p = 0.001 for trend). Simple linear regression found a significant, positive relationship between the independent variable, HDL-C, and the dependent variable, oxLDL-Ab (R = 0.293; p = 0.009). This relation remained significant (R = 0.30; p = 0.044), after adjustment by covariates. Apolipoprotein AI levels were also related to oxLDL-Ab in both simple and adjusted linear regression models. Conclusion HDL-C and oxLDL-Ab are independently related.

https://doi.org/10.36660/abc.20210796

11.

Cordyceps cateniannulata and Cordyceps javanica: first report of pathogenicity to Glycaspis brimblecombei (Hemiptera: Aphalaridae)
Facebook Twitter

Outras redes sociais
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Outras redes

Métricas
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

DOMINGUES, MAURÍCIO M.

; SANTOS, PAULA L.

; GÊA, BIANCA C.C.

; CARVALHO, VANESSA R.

; OLIVEIRA, FABRICIO N.

; SOLIMAN, EVERTON P.

; PEREIRA, FABRICIO F.

; ZANUNCIO, JOSÉ C.

; WILCKEN, CARLOS F.

Anais da Academia Brasileira de Ciências

Métricas do periódico
- Sobre o periódico
- SciELO Analytics

2022, Volume 94 elocation e20211566

Resumo: En | Texto: En | PDF: En

Abstract Cultivation of species of the genus Eucalyptus is important for the Brazilian economy, with 6.97 million hectares planted. Glycaspis brimblecombei Moore (Hemiptera: Aphalaridae), detected in Brazil in 2003, has dispersed and now damages Eucalyptus crops in all regions of this country. The location and identification of entomopathogenic fungi isolates may increase the options for integrated pest management. The objective of this research was to evaluate the pathogenicity of Cordyceps cateniannulata and Cordyceps javanica isolates to G. brimblecombei. Ten nymphs of G. brimblecombei, with or without lerps, were placed per Eucalyptus leaf cut with one of its edges on hydroretentive gel inside Petri dishes. The fungi isolates were suspended in a solution of Tween 80 (0.1%) at the concentration of 1.0 x 108 conidia mL-1 and sprayed on the G. brimblecombei nymphs. The mortality of this insect was evaluated daily for seven days, and the dead individuals were transferred to humid chambers. The conidia viability of the isolates was greater than 93%. The mortality of G. brimblecombei nymphs, seven days after the application of the fungi, was 100%. This is the first report of the pathogenicity of C. cateniannulata and C. javanica isolates, occurring naturally in the field, to G. brimblecombei.

https://doi.org/10.1590/0001-3765202220211566

12.

Depressive symptoms as an independent risk factor for mortality
Facebook Twitter

Outras redes sociais
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Outras redes

Métricas
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Corrêa, Vanessa P.

; Confortin, Susana C.

; d’Orsi, Eleonora

; de Sá-Junior, Antônio R.

; de Oliveira, Cesar

; Schneider, Ione J.C.

Brazilian Journal of Psychiatry

Métricas do periódico
- Sobre o periódico
- SciELO Analytics

Jun 2021, Volume 43 Nº 3 Páginas 247 - 253

Resumo: En | Texto: En | PDF: En

Objective: To evaluate the relationship between presence of depressive symptoms and risk of death in older adults residing in a municipality in Southern Brazil. Methods: Between 2009 and 2014, 1,391 people participated in the EpiFloripa Aging Cohort Study, a population-based longitudinal study. Depressive symptoms were assessed through the Geriatric Depression Scale. The initial time was considered the age at the first interview, and the end time, the age at the last contact or death. Cox regression models were used to estimate the mortality risk associated with depressive symptoms, adjusted by sex, education, income, paid work, smoking status, alcohol consumption, morbidities, medication use, physical activity, disability, cognitive impairment, and body mass index. Results: The prevalence of depressive symptoms was 23.5% (95%CI 20.4-26.9). On crude analysis, the risk of mortality was 1.86 (95%CI 1.35-2.55) for individuals with depressive symptoms; in adjusted models, the risk of mortality was 1.67 (95%CI 1.15-2.40). Conclusion: Depressive symptoms are an independent risk factor for mortality in older Brazilian adults. Our findings highlight the importance of screening this population for depression and the practice of preventive actions.

https://doi.org/10.1590/1516-4446-2019-0749 184 downloads

13.

Rosmarinus officinalis L. (rosemary) extract has antibiofilm effect similar to the antifungal nystatin on Candida samples
Facebook Twitter

Outras redes sociais
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Outras redes

Métricas
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

MECCATTI, VANESSA M.

; OLIVEIRA, JONATAS R. DE

; FIGUEIRA, LEANDRO W.

; LAGAREIRO NETTO, AMANDIO A.

; ZAMARIOLI, LUCAS S.

; MARCUCCI, MARIA C.

; CAMARGO, SAMIRA E.A.

; CARVALHO, CLÁUDIO A.T.

; OLIVEIRA, LUCIANE D. DE

Anais da Academia Brasileira de Ciências

Métricas do periódico
- Sobre o periódico
- SciELO Analytics

2021, Volume 93 Nº 2 elocation e20190366

Resumo: En | Texto: En | PDF: En

Abstract Candida spp. are naturally opportunistic and can promote infections. These yeasts can form biofilm, after penetration and adhesion to the biotic or abiotic surfaces. Preexisting diseases, treatments with drugs and radiation therapy, medical procedures, and parafunctional habits favor the installation of a fungal infection. Increased resistance to the available antifungals has become a concern. Therefore, alternative methods to control them have been evaluated, including the use of plant substances. In this study, the antibiofilm effect of R. officinalis L. extract was analyzed on C. albicans, C. dubliniensis, C. glabrata, C. krusei, and C. tropicalis. A phytochemical analysis of the extract was performed. Biofilms were formed for 48 h and exposed to the different concentrations of the extract (50, 100, and 200 mg/mL) for 5 min or 24 h. The effect of the plant extract was compared to the antifungal nystatin. Rosmarinus officinalis L. extract was constituted of phenols and flavonoids, highlighting the presence of chlorogenic acid derivatives in its composition. Biofilm reductions were observed after exposure to the plant extract for both periods. The plant extract provided a reduction similar to the antifungal. Thus, R. officinalis L. extract showed antibiofilm effect on Candida spp. comparable to the nystatin.

https://doi.org/10.1590/0001-3765202120190366 517 downloads

14.

Genetic diversity assessment for the vulnerable migratory cownose ray Rhinoptera bonasus (Myliobatiformes: Rhinopteridae) from the southwestern Atlantic Ocean
Facebook Twitter

Outras redes sociais
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Outras redes

Métricas
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Souza, Bruno C.

; Cruz, Vanessa P.

; Almeida, Talita R. A.

; Sales, João Bráullio L.

; Rodrigues-Filho, Luís Fernando S.

; Vianna, Marcelo

; Rotundo, Matheus M.

; Oliveira, Claudio

; Foresti, Fausto

Neotropical Ichthyology

Métricas do periódico
- Sobre o periódico
- SciELO Analytics

2021, Volume 19 Nº 4 elocation e210077

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

RESUMO Rhinoptera bonasus é uma espécie bento-pelágica e altamente migratória, que ocorre do sul dos Estados Unidos ao norte da Argentina. Devido aos efeitos da sobrepesca, R. bonasus está atualmente em risco, classificada pela Lista Vermelha da IUCN como vulnerável. Considerando a falta de dados moleculares disponíveis para R. bonasus, este estudo teve como objetivo descrever a variabilidade genética e estrutura populacional de espécimes amostrados em três ecorregiões do litoral brasileiro (Ecorregião Amazônica, Pará; Ecorregião Nordeste, Pernambuco e Ecorregião Sudeste, Rio de Janeiro, São Paulo e Santa Catarina), por meio de cinco marcadores microssatélites polimórficos. Assim, testaremos as hipóteses de panmixia e filopatria natal. Um total de 69 espécimes analisados revelou diferenciação genética individual e significativa entre os locais amostrados. As análises de Φ ST (0,12), PCA, DAPC e Bayesiana revelaram pelo menos dois agrupamentos genéticos distintos de R. bonasus. Os testes de IBD foram significativos, indicando uma correlação entre a distância genética e geográfica entre as populações, o que pode ser explicado pelo comportamento filopátrico reprodutivo. O comportamento filopátrico associado à mobilidade de R. bonasus pode influenciar os valores de diferenciação observados para todos os loci nas amostras investigadas.

ABSTRACT Rhinoptera bonasus is a bento-pelagic and highly migratory species occurring from southern United States to northern Argentina. Due to overfishing effects, R. bonasus is currently at risk, classified by the IUCN Red List as vulnerable. Considering the lack of molecular data available for R. bonasus, this study aimed to describe the genetic variability and population structure of specimens sampled from three Brazilian coast ecoregions (Amazon ecoregion, Pará; Northeastern ecoregion, Pernambuco and Southeastern ecoregion, Rio de Janeiro, São Paulo and Santa Catarina), through five polymorphic microsatellite markers. Here testing the panmixia hypothesis for Brazilian ecoregions and test natal philopathy. A total of 69 analyzed specimens revealed individual and significant genetic differentiation between the sampled locations. Φ ST (0.12), PCA, DAPC and Bayesian analyses of the genetic population structure revealed at least two distinct genetic R. bonasus groupings. IBD tests were significant, indicating a correlation between genetic and geographical distance among populations, which can be explained by reproductive philopatric behavior. Philopatric behavior associated with R. bonasus mobility may influence the differentiation values observed for all loci in the investigated samples.

https://doi.org/10.1590/1982-0224-2021-0077

15.

Investigations on the adsorption, wettability and zeta potential of anionic surfactant in limestone
Facebook Twitter

Outras redes sociais
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Outras redes

Métricas
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

NEVES, ALLAN M.

; SANTANNA, VANESSA C.

; BARILLAS, JENNYS L.M.

; DANTAS, TEREZA N. CASTRO

; OLIVEIRA, KATHERINE C.

; GÓIS, ALISSON G.B.

Anais da Academia Brasileira de Ciências

Métricas do periódico
- Sobre o periódico
- SciELO Analytics

2021, Volume 93 Nº 4 elocation e20190534

Resumo: En | Texto: En | PDF: En

Abstract The understanding of the mechanisms that affect oil production in carbonaceous reservoirs has become increasingly necessary, particularly in limestone, which mostly features oil wettability properties that diminishes petroleum recovery. The objective of this work was to investigate the ability of anionic surfactant (coconut oil derived soap) to adsorb in limestone in order to promote wettability change. The finite-bath technique was employed with changes in temperature, mass of adsorbent material (limestone), contact time and surfactant concentration. Contact angle and zeta potential measurements were also made. The surfactant could be significantly adsorbed on the rock, possibly due to ions that are charged oppositely to the species on the rock surface. A temperature rise from 30 °C to 50 °C was unfavourable to the adsorption capacity. The oil-wettable in-natura limestone had its wettability reduced after the treatment with surfactant. The zeta potential measurements showed that electrostatic attractions play an important role in the adsorption process.

https://doi.org/10.1590/0001-3765202120190534 51 downloads

Exibindo

itens por página

Página de 5 Próxima

Selecione um ou mais resultados

Todos Ordem alfabética

Resultados

Gráfico comparativo Download CSV

Visualizar estatísticas de

Enviar resultado

E-mail do(s) destinatários*

Utilize ; (ponto e vírgula) para mais de um e-mail.

Enviar por e-mail

Esta página

Registros selecionados

Todos os registros (max. 300)

Alterar remetente, assunto e comentários

Seu email

Assunto

Comentários

Alterar remetente, assunto e comentários

Exportar resultados

Formato de exportação:

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

BibTeX

Citação

CSV (para Excel, etc)

Exportar:

Esta página

Itens selecionados

Todos os registros (max. 2000)

Mostrar mais

Sem resultados

Não foram encontrados documentos para sua pesquisa

Glossário e ajuda para busca

Você pode enriquecer sua busca de uma forma muito simples. Use os índices de pesquisa combinados com os conectores (AND ou OR) e especifique cada vez mais sua busca.

Por exemplo, se você deseja buscar artigos sobre
casos de dengue no Brasil em 2015, use:
ti:dengue and publication_year:2015 and aff_country:Brasil

Veja abaixo a lista completa de índices de pesquisa que podem ser usados:

Cód. do Índice	Elemento
ti	título do artigo
au	autor
kw	palavras-chave do artigo
subject	assunto (palavras do título, resumo e palavras-chave)
ab	resumo
ta	título abreviado da revista (ex. Cad. Saúde Pública)
journal_title	título completo da revista (ex. Cadernos de Saúde Pública)
la	código do idioma da publicação (ex. pt - Português, es - Espanhol)
type	tipo do documento
pid	identificador da publicação
publication_year	ano de publicação do artigo
sponsor	financiador
aff_country	código do país de afiliação do autor
aff_institution	instituição de afiliação do autor
volume	volume do artigo
issue	número do artigo
elocation	elocation
doi	número DOI
issn	ISSN da revista
in	código da coleção SciELO (ex. scl - Brasil, col - Colômbia)
use_license	código da licença de uso do artigo

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 o conteúdo de www.scielo.org, exceto onde está identificado, está licenciado sob uma Licença Creative Commons.
saiba mais »