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au:Ferreira, Camila J. B.
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1.
Performance of glyphosate-based products applied alone and in combination with herbicides in burndown
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Pereira, Bruno C. S.
; Braz, Guilherme B. P.
; Souza, Matheus de F.
; Reginaldo, Laís T. R. T.
; Ferreira, Camila J. B.
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ABSTRACT The no-tillage system is a conservation system that helps sustainability and agricultural production. The effectiveness of glyphosate control, applied alone or in combination with other herbicides, can be altered depending on the product’s formulation. The objective of the present study was to evaluate the effectiveness of glyphosate in formulations containing different salts and concentrations, applied alone and in combination with other herbicides, in controlling weeds in advanced stages in the pre-sowing burndown operation. The experiment was carried out in the field in an area with a history of high weed infestation. The experiment was conducted in a randomized block design, evaluating eleven treatments and four replicates. The treatments consisted of the application of three glyphosate-based formulations alone and in combination with clethodim and 2,4-D amine herbicides, in addition to a control without herbicide application. The evaluated variables were percentage of weed control and percentage of desiccation. A comparison of means by contrasts was performed to analyze the percentage of weed control. In general, treatments containing products based on glyphosate potassium salt in the composition have slightly better control performance compared to those consisting of glyphosate isopropylamine salt.
RESUMO O sistema de plantio direto é um sistema conservacionista que auxilia na sustentabilidade e a produção agrícola. A eficácia de controle do glyphosate, aplicado isoladamente ou em associação a outros herbicidas, pode ser alterada em função da formulação do produto. O objetivo do presente trabalho foi avaliar a eficácia de glyphosate em formulações contendo diferentes sais e concentrações, aplicado isolado e em associações a outros herbicidas, no controle de plantas daninhas em estádios avançados na operação de dessecação pré-semeadura. O experimento foi realizado a campo em área com histórico de elevada infestação de plantas daninhas. O experimento foi conduzido no delineamento de blocos casualizados, avaliando-se onze tratamentos e quatro repetições. Os tratamentos foram compostos pela aplicação de três formulações à base de glyphosate isolado e em associações com os herbicidas clethodim e 2,4-D amina, além de uma testemunha sem aplicação. As variáveis avaliadas foram porcentagem de controle das plantas daninhas e porcentagem de dessecação. Foi realizado uma comparação de médias por contrastes para analisar a porcentagem de controle de plantas daninhas. De maneira geral, tratamentos contendo produtos à base de glyphosate sal potássico na composição apresentam performance de controle ligeiramente superior em comparação com àqueles constituídos por glyphosate sal de isopropilamina.
2.
Evaluation of the Seasonality and Extraction Method on the Polar Extracts of Croton grewioides Baill. by Chromatogram Fingerprinting and Isolation of a New Triglycosylated Flavonoid
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Prado, Vilma M. J.
; Jesus, Raphael A. de
; Oliveira, Julio M. A.
; Pereira, Camila S. A.
; Blank, Arie F.
; Pereira-Filho, Edenir R.
; Cass, Quezia B.
; Lima, Juliana M. de
; Ferreira, Antonio G.
; Nogueira, Paulo C. L.
; Moraes, Valéria R. S.
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Journal of the Brazilian Chemical Society
- Métricas do periódico
Croton grewioides Baill. popularly known as “canelinha” or “canelinha-de-cheiro” has been used for the treatment of influenza, antitussive, febrifuge and headache; however, the study of its phytochemical composition is limited. The aim of this study was to investigate the effect of the extraction method and seasonality through leaf extracts of four accessions of Croton grewioides by fingerprint chromatograms aided by principal component analysis to analyze the differences and similarities among the samples. We aimed also to provide chemical characterization of isolated secondary metabolites using semi-preparative liquid chromatography. The results showed that only the chemical profile of the methanolic extracts of accessions 101 and 113 were influenced by the seasonality. For the first time, four flavonoids were isolated through semi-preparative chromatography in this species, characterized as quercetin 3-O-β-D-galactopyranosyl-(1→2)-α-L-rhamnopyranoside-(1→6)-α-L-rhamnopyranoside (1), quercetin 3-O-β-D-galactopyranosyl-(1→2)-α-apiopyranoside-(1→6)-α-L-rhamnopyranoside (2), quercetin 3-O-glucopyranoside (3) and 3-O-methyl-quercetin (4), the flavonoid (2) has been recognized as a new triglycosylated derivative.
https://doi.org/10.21577/0103-5053.20200190
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3.
Human papillomavirus and coinfections with Chlamydia trachomatis, Gardnerella vaginalis, and Trichomonas vaginalis in self-collected samples from female sex workers in the Central-Western region of Brazil
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Lugo, Larissa Z. A.
; Jacob, Camila M. B.
; Machado, Ana Paula
; Almeida, Flávia G.
; Ávila, Leandro S.
; Prata, Thiago T. M.
; Padovani, Cacilda T. J.
; Ferreira, Alda Maria T.
; Fernandes, Carlos Eurico S.
; Tozetti, Inês Aparecida
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Jornal Brasileiro de Patologia e Medicina Laboratorial
- Métricas do periódico
RESUMO Introdução: O papilomavírus humano (HPV) está intimamente associado ao câncer cervical, e a presença de coinfecções, como por Chlamydia trachomatis, Gardnerella vaginalis e Trichomonas vaginalis, pode potencializar ou facilitar a infecção por HPV. As mulheres profissionais do sexo são consideradas vulneráveis à aquisição dessas infecções devido à exposição aos fatores de risco. Objetivo: Determinar a infecção por HPV, os tipos virais e as coinfecções em amostras autocoletadas de mulheres profissionais do sexo. Métodos: Amostras autocoletadas de mulheres profissionais do sexo, do canal vaginal e da cérvice uterina, foram submetidas a detecção do HPV-ácido desoxirribonucleico (DNA), genotipagem viral por reação em cadeia da polimerase (PCR) tipo específica e restriction fragment length polymorphism (RFLP) e detecção de coinfecção. Resultados: O HPV-DNA foi detectado em 19,4% das amostras, sendo os tipos HPV 31, 6 e 53 os mais frequentes. Houve predominância de HPV de alto risco (HR-HPV) e elevada presença de infecções múltiplas (84,6%). A presença de coinfecções foi observada tanto para HPV e C. trachomatis quanto para HPV e G. vaginalis. Observou-se também que mulheres profissionais do sexo que não fazem uso de preservativos e aquelas que não realizam o exame citológico rotineiramente estão predispostas à aquisição da infecção causada pelo HPV. Conclusão: Os resultados obtidos ressaltam a importância de estudos mais abrangentes entre as populações vulneráveis, objetivando estabelecer medidas para a conscientização sobre os riscos de aquisição das infecções sexualmente transmitidas, bem como auxiliar estudos futuros para introdução de vacinas contra o HPV com maior cobertura de tipos virais.
ABSTRACT Introduction: Human papillomavirus (HPV) is intimately associated with cervical cancer, and the presence of coinfections, such as with Chlamydia trachomatis, Gardnerella vaginalis and Trichomonas vaginalis, may potentiate or facilitate HPV infection. Female sex workers are considered vulnerable to the acquisition of these infections due to exposure to risk factors. Objective: To determine HPV infection, viral types and coinfections in self-collected samples from female sex workers. Methods: Self-collected samples from female sex workers, of vaginal canal and uterine cervix, were subjected to HPV-deoxyribonucleic acid (DNA) detection, viral genotyping by type-specific polymerase chain reaction (PCR), restriction fragment length polymorphism (RFLP), and the detection of coinfection. Results: HPV-DNA was detected in 19.4% of the samples, and HPV 31, 6, and 53 were the most frequently detected types. There was a predominance of high-risk oncogenic HPV (HR-HPV) and a strong presence of simultaneous infections with multiple HPV types (84.6%). Coinfections with both HPV and C. trachomatis, and HPV and G. vaginalis were detected. The variables that were statistically associated with HPV infection and the presence of multiple infections were non-use of condoms and non-compliance with regular cervical cytology screening. Conclusion: The results highlight the importance of more comprehensive studies among vulnerable populations, aiming to establish measures to raise awareness about the risks of contracting sexually transmitted infections, as well as to support future studies for introducing HPV vaccines with wider coverage of viral types.
https://doi.org/10.5935/1676-2444.20180010
2094 downloads
4.
Currents issues in cardiorespiratory care of patients with post-polio syndrome
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Orsini, Marco
; Lopes, Agnaldo J.
; Guimarães, Fernando S.
; Freitas, Marcos R. G.
; Nascimento, Osvaldo J. M.
; Anna Junior, Mauricio de Sant’
; Moreira Filho, Pedro
; Fiorelli, Stenio
; Ferreira, Ana Carolina A. F.
; Pupe, Camila
; Bastos, Victor H. V.
; Pessoa, Bruno
; Nogueira, Carlos B.
; Schmidt, Beny
; Souza, Olivia G.
; Davidovich, Eduardo R
; Oliveira, Acary S. B.
; Ribeiro, Pedro
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RESUMO Síndrome pós-polio (SPP) é uma condição que afeta sobreviventes da poliomielite aguda (PAA), anos após a recuperação de um ataque agudo inicial do vírus. Na maioria das vezes, os sobreviventes da polio começam a apresentar nova paresia gradual nos músculos que foram previamente afetados pela infecção. A incidência real de doenças cardiovasculares (DCV) em indivíduos que sofrem de SPP não é conhecida. Entretanto, há indícios para suspeitar de que sujeitos com SPP podem estar em maior risco. Método Realizou-se uma busca de artigos nas bases de dados: Bireme, Scielo e Pubmed, utilizando as seguintes palavras-chave: síndrome pós-poliomielite, função cardiorrespiratória e reabilitação, nos idiomas Inglês, Francês e Espanhol. Embora tenhamos selecionado um número expressivo de artigos, somente foram considerados os duplo-cegos, randomizados-controlados, além de consensos. Resultados e Discussão Certas características da SPP, tais como fadiga muscular, paresia, dor muscular e/ou articulares podem resultar em descondicionamento por inatividade física, além de obesidade e dislipidemia. Dificuldades respiratórias são comuns e podem resultar em hipoxemia. Conclusão Somente quando avaliados e tratados em tempo hábil, alguns pacientes são capazes de obter os benefícios do uso dos músculos respiratórios auxiliares em termos de qualidade de vida.
ABSTRACT Post-polio syndrome (PPS) is a condition that affects polio survivors years after recovery from an initial acute attack of the poliomyelitis virus. Most often, polio survivors experience a gradual new weakening in muscles that were previously affected by the polio infection. The actual incidence of cardiovascular diseases (CVDs) in individuals suffering from PPS is not known. However, there is a reason to suspect that individuals with PPS might be at increased risk. Method A search for papers was made in the databases Bireme, Scielo and Pubmed with the following keywords: post polio syndrome, cardiorespiratory and rehabilitation in English, French and Spanish languages. Although we targeted only seek current studies on the topic in question, only the relevant (double-blind, randomized-controlled and consensus articles) were considered. Results and Discussion Certain features of PPS such as generalized fatigue, generalized and specific muscle weakness, joint and/or muscle pain may result in physical inactivity deconditioning obesity and dyslipidemia. Respiratory difficulties are common and may result in hypoxemia. Conclusion Only when evaluated and treated promptly, somE patients can obtain the full benefits of the use of respiratory muscles aids as far as quality of life is concerned.
https://doi.org/10.1590/0004-282X20160072
6960 downloads
5.
Histopathological features of mucosa atrophy in atrophic body gastritis
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Barbosa, Alfredo J. A.
; Boldt, Marcela S.
; Rodrigues, Carolinne B.
; Silva, Camila S. C.
; Ferreira, Hulie M.
; Pereira, Rivelle D.
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Jornal Brasileiro de Patologia e Medicina Laboratorial
- Métricas do periódico
RESUMO Introdução: A atrofia da mucosa gástrica tornou-se capítulo importante da patologia gástrica devido ao seu estreito relacionamento com as lesões de risco para o câncer gástrico. Embora a atrofia gástrica possa estar associada a diferentes doenças, ela tem sido abordada como um processo genérico, omitindo-se suas diferentes causas. Objetivo: Estudar as características histopatológicas da atrofia da mucosa gástrica em pacientes com gastrite atrófica do corpo (ABG). Material e métodos: Foram estudados casos consecutivos de pacientes com diagnóstico de ABG que apresentavam mucosa antral normal ou apenas alterações inflamatórias mínimas. Pacientes submetidos a cirurgia gastrointestinal prévia ou portadores de câncer gastrointestinal foram excluídos. Nas preparações histopatológicas, estudou-se a presença de glândulas que exibiam metaplasia intestinal e metaplasia pseudoantral (PSA). Resultados: No período 2004-2006, 7.309 pacientes foram submetidos à endoscopia esofagogástrica com biópsias, sendo 3.556 (48,6%) homens e 3.753 (51,4%) mulheres. Entre eles, 105 pacientes H. pylori negativos tiveram o diagnóstico de ABG confirmado, sendo 32 (30,5%) homens e 73 (69,5%) mulheres (p < 0,001). Glândulas com metaplasia intestinal e/ou metaplasia PSA foram identificadas em todos os pacientes. Isoladamente, a metaplasia PSA foi mais frequente que a metaplasia intestinal, respectivamente 42 (40%) vs. quatro (3,8%). Os dois tipos de metaplasia ocorreram simultaneamente na maioria (56,2%) dos pacientes, não se observando diferenças entre os gêneros (p = 0.67). Conclusão: A atrofia da mucosa gástrica na ABG mostra características histopatológicas próprias que devem ser consideradas nos estudos sobre o relacionamento da atrofia gástrica com o câncer gástrico.
ABSTRACT Introduction: Gastric mucosa atrophy became a major issue in gastric pathology because of its connection with risk lesions for gastric cancer. Although gastric atrophy is frequently associated with different diseases, it has been included in many studies simply as a generic pathological condition, and different causes of gastric atrophy are omitted. Objective: To study the histopathological features of gastric mucosa atrophy inH. pylori- negative patients with atrophic body gastritis (ABG). Material and methods: Consecutive cases of patients diagnosed with ABG, and presenting normal or just lightly inflamed antral mucosa, were studied. Patients with gastrointestinal cancer and those with history of prior gastrointestinal surgery were excluded. The presence of intestinal metaplasia and pseudoantral (PSA) metaplasia in atrophic body mucosa was assessed. Results: During the period of 2004-2006 a total of 7,309 patients underwent gastroesophageal endoscopy with biopsies of the gastric mucosa; 3,556 (48.6%) were males, and 3,713 (51.4%) females. Among them, 105 had the diagnosis of ABG confirmed, with 32 (30.5%) males, and 73 (69.5%) females (p < 0.001). Intestinal metaplasia and/or PSA metaplasia were identified in all patients. As isolated lesions, PSA metaplasia was more frequent than intestinal metaplasia, respectively 42 (40%) vs. four (3.8%) cases. In most patients (56.2%) both types of metaplasia occurred simultaneously, and no differences were observed among genders (p = 0.67). Conclusion: Gastric mucosa atrophy in ABG shows distinctive histopathological features which should be considered in studies on the relationship between gastric mucosa atrophy and gastric cancer.
https://doi.org/10.5935/1676-2444.20160006
6472 downloads
6.
Update of the Brazilian floristic list of Algae and Cyanobacteria
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Menezes, Mariângela
; Bicudo, Carlos E. M.
; Moura, Carlos W. N.
; Alves, Aigara M.
; Santos, Alana A.
; Pedrini, Alexandre de G.
; Araújo, Andréa
; Tucci, Andrea
; Fajar, Aurelio
; Malone, Camila
; Kano, Cecília H.
; Sant'Anna, Célia L.
; Branco, Ciro Z.
; Odebrecht, Clarisse
; Peres, Cleto K.
; Neuhaus, Emanuel B.
; Eskinazi-Leça, Enide
; Aquino, Eveline
; Nauer, Fabio
; Santos, Gabriel N.
; Amado Filho, Gilberto M.
; Lyra, Goia M.
; Borges, Gyslaine C.P.
; Costa, Iara O.
; Nogueira, Ina de S.
; Oliveira, Ivania B.
; Paula, Joel. C.de
; Nunes, José M. de C.
; Lima, Jucicleide C.
; Santos, Kleber R.S.
; Ferreira, Leandro C.
; Gestinari, Lísia M.S.
; Cardoso, Luciana S.
; Figueiredo, Marcia A.O.
; Silva, Marcos H.
; Barreto, Maria B.B.B.
; Henriques, Maria C.O.
; Cunha, Maria da G.G.S.
; Bandeira-Pedrosa, Maria E.
; Oliveira-Carvalho, Maria F.
; Széchy, Maria T.M.
; Azevedo, Maria T.P.
; Oliveira, Mariana C. de
; Cabezudo, Mariê M.
; Santiago, Marilene F.
; Bergesh, Marli
; Fujii, Mutuê T.
; Bueno, Norma C.
; Necchi Jr., Orlando
; Jesus, Priscila B.
; Bahia, Ricardo G.
; Khader, Samir
; Alves-da-Silva, Sandra M.
; Guimarães, Silvia M.P.B.
; Pereira, Sonia M.B.
; Caires, Taiara A.
; Meurer, Thamis
; Cassano, Valéria
; Werner, Vera R.
; Gama Jr., Watson A. da
; Silva, Weliton J. da
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Resumo Apresenta-se uma síntese atualizada de informações sobre algas no Brasil objetivando refinar os dados reunidos até o presente, bem como avaliar os avanços sobre o conhecimento da diversidade de algas no país desde a publicação do Catálogo de Plantas e Fungos do Brasil. Os resultados de 2015 mostraram um acréscimo de 1.250 espécies (35.7%) a um total de 4.747 em relação a 2010. As classes mais diversas em número de espécies foram Bacillariophyceae, Conjugatophyceae, Florideophyceae, Cyanophyceae, Dinophyceae e Euglenophyceae. Bacillariophyceae e Cyanophyceae tiveram o maior acréscimo de espécies no intervalo de cinco anos. A região Sudeste e Sul foram as mais diversas, porém, as regiões Nordeste com os estados do Piauí e Sergipe e Centro-Oeste com os estados de Mato Grosso, Goiás e Distrito Federal destacaram-se no cenário da biodiversidade nacional. Apesar da escassez de taxonomistas e da infraestrutura limitada, os resultados obtidos evidenciaram um avanço significativo no conhecimento da diversidade de algas no país nesse período de cinco anos, iniciando uma mudança quanto as diferenças geográficas regionais.
Abstract An updated synthesis of cyanobacteria and algae information is presented for Brazil aiming to refine the data gathered to date and evaluate the progress of the biodiversity knowledge about these organisms in the country since the publication of the Catálogo de Plantas e Fungos do Brasil. The results of 2015 showed an increase of 1,250 species (35.7%) when compared to 2010, reaching a total of 4,747 species. The most diverse classes in species number were the Bacillariophyceae, Conjugatophyceae, Florideophyceae, Cyanophyceae, Dinophyceae and Euglenophyceae. Bacillariophyceae and Cyanophyceae had the highest increase in species number in the five-year interval. The Southeast and South regions were the most diverse, however, the Northeast, with the states of Piauí and Sergipe, and the Central-west region, with Mato Grosso, Goiás and Distrito Federal, also stood out in the national algal biodiversity scenario. Despite the shortage of taxonomists and limited infrastructure, the results showed a significant improvement in the knowledge regarding the diversity of cyanobacteria and algae in the country during the study period, starting to even out regional geographical differences caused by subsampling.
https://doi.org/10.1590/2175-7860201566408
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Growing knowledge: an overview of Seed Plant diversity in Brazil
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Zappi, Daniela C.
; Filardi, Fabiana L. Ranzato
; Leitman, Paula
; Souza, Vinícius C.
; Walter, Bruno M.T.
; Pirani, José R.
; Morim, Marli P.
; Queiroz, Luciano P.
; Cavalcanti, Taciana B.
; Mansano, Vidal F.
; Forzza, Rafaela C.
; Abreu, Maria C.
; Acevedo-Rodríguez, Pedro
; Agra, Maria F.
; Almeida Jr., Eduardo B.
; Almeida, Gracineide S.S.
; Almeida, Rafael F.
; Alves, Flávio M.
; Alves, Marccus
; Alves-Araujo, Anderson
; Amaral, Maria C.E.
; Amorim, André M.
; Amorim, Bruno
; Andrade, Ivanilza M.
; Andreata, Regina H.P.
; Andrino, Caroline O.
; Anunciação, Elisete A.
; Aona, Lidyanne Y.S.
; Aranguren, Yani
; Aranha Filho, João L.M.
; Araújo, Andrea O.
; Araújo, Ariclenes A.M.
; Araújo, Diogo
; Arbo, María M.
; Assis, Leandro
; Assis, Marta C.
; Assunção, Vivian A.
; Athiê-Souza, Sarah M.
; Azevedo, Cecilia O.
; Baitello, João B.
; Barberena, Felipe F.V.A.
; Barbosa, Maria R.V.
; Barros, Fábio
; Barros, Lucas A.V.
; Barros, Michel J.F.
; Baumgratz, José F.A.
; Bernacci, Luis C.
; Berry, Paul E.
; Bigio, Narcísio C.
; Biral, Leonardo
; Bittrich, Volker
; Borges, Rafael A.X.
; Bortoluzzi, Roseli L.C.
; Bove, Cláudia P.
; Bovini, Massimo G.
; Braga, João M.A.
; Braz, Denise M.
; Bringel Jr., João B.A.
; Bruniera, Carla P.
; Buturi, Camila V.
; Cabral, Elza
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; Caddah, Mayara K.
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; Carneiro, Camila R.
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; Carneiro-Torres, Daniela S.
; Carrijo, Tatiana T.
; Caruzo, Maria B.R.
; Carvalho, Maria L.S.
; Carvalho-Silva, Micheline
; Castello, Ana C.D.
; Cavalheiro, Larissa
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; Chacon, Roberta G.
; Chautems, Alain
; Chiavegatto, Berenice
; Chukr, Nádia S.
; Coelho, Alexa A.O.P.
; Coelho, Marcus A.N.
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; Cordeiro, Inês
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Resumo Um levantamento atualizado das plantas com sementes e análises relevantes acerca desta biodiversidade são apresentados. Este trabalho se iniciou em 2010 com a publicação do Catálogo de Plantas e Fungos e, desde então vem sendo atualizado por mais de 430 especialistas trabalhando online. O Brasil abriga atualmente 32.086 espécies nativas de Angiospermas e 23 espécies nativas de Gimnospermas e estes novos dados mostram um aumento de 3% da riqueza em relação a 2010. A Amazônia é o Domínio Fitogeográfico com o maior número de espécies de Gimnospermas, enquanto que a Floresta Atlântica possui a maior riqueza de Angiospermas. Houve um crescimento considerável no número de espécies e nas taxas de endemismo para a maioria dos Domínios (Caatinga, Cerrado, Floresta Atlântica, Pampa e Pantanal), com exceção da Amazônia que apresentou uma diminuição de 2,5% de endemicidade. Entretanto, a maior parte das plantas com sementes que ocorrem no Brasil (57,4%) é endêmica deste território. A proporção de formas de vida varia de acordo com os diferentes Domínios: árvores são mais expressivas na Amazônia e Floresta Atlântica do que nos outros biomas, ervas são dominantes no Pampa e as lianas apresentam riqueza expressiva na Amazônia, Floresta Atlântica e Pantanal. Este trabalho não só quantifica a biodiversidade brasileira, mas também indica as lacunas de conhecimento e o desafio a ser enfrentado para a conservação desta flora.
Abstract An updated inventory of Brazilian seed plants is presented and offers important insights into the country's biodiversity. This work started in 2010, with the publication of the Plants and Fungi Catalogue, and has been updated since by more than 430 specialists working online. Brazil is home to 32,086 native Angiosperms and 23 native Gymnosperms, showing an increase of 3% in its species richness in relation to 2010. The Amazon Rainforest is the richest Brazilian biome for Gymnosperms, while the Atlantic Rainforest is the richest one for Angiosperms. There was a considerable increment in the number of species and endemism rates for biomes, except for the Amazon that showed a decrease of 2.5% of recorded endemics. However, well over half of Brazillian seed plant species (57.4%) is endemic to this territory. The proportion of life-forms varies among different biomes: trees are more expressive in the Amazon and Atlantic Rainforest biomes while herbs predominate in the Pampa, and lianas are more expressive in the Amazon, Atlantic Rainforest, and Pantanal. This compilation serves not only to quantify Brazilian biodiversity, but also to highlight areas where there information is lacking and to provide a framework for the challenge faced in conserving Brazil's unique and diverse flora.
https://doi.org/10.1590/2175-7860201566411
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8.
Teores de Cu e Zn em perfis de solos de diferentes litologias em Santa Catarina
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Hugen, Camila
; Miquelluti, David J.
; Campos, Mari L.
; Almeida, Jaime A. de
; Ferreira, Élen R. N. C.
; Pozzan, Marluci
.
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Revista Brasileira de Engenharia Agrícola e Ambiental
- Métricas do periódico
Os metais pesados têm origem principalmente no solo, por meio do intemperismo de rochas ricas nesses elementos. Objetivou-se, neste trabalho, avaliar os teores de Cu e Zn em 58 perfis modais das principais classes de solo do Estado de Santa Catarina, coletados em ambientes naturais não antropizados e derivados de diferentes litologias. Foram utilizadas 111 amostras de solo considerando-se horizontes A e B. Os teores de Cu e Zn foram extraídos com água régia e quantificados em absorção atômica. Para a análise dos resultados os dados foram categorizados utilizando-se, como variáveis, os teores de Cu e Zn; avaliaram-se o efeito de horizonte genético, perfil e o material de origem na distribuição desses metais através das técnicas de análise univariada. Os solos amostrados para este trabalho são derivados, na sua maioria, de rochas ígneas básicas, reflexo da sua quantidade expressiva no estado. Os resultados mostram que, em solos catarinenses, a concentração de Cu e Zn é relacionada à composição geoquímica do material de origem. Assim, referidos elementos podem ser usados na indicação da influência das diferentes litologias como, também, na definição da concentração de base para monitoramento ambiental.
Heavy metals occur in the soil through the weathering of rocks rich in these elements. The objective of this study was to evaluate the contents of Cu and Zn in 58 modal profiles of the major soil types of the State of Santa Catarina, collected in natural soils without anthropogenic interference, and derived from different lithologies. One hundred and eleven soil samples were used from the A and B horizons. The Cu and Zn elements were extracted with Aqua Regia method and quantified by atomic absorption. For the analysis of the results, the data was categorized using as variables the concentrations of Cu and Zn, and the effect of genetic horizon, profile, and rock material on the distribution of these metals using univariate techniques was evaluated. The sampled soils for this study are mostly derived from igneous rocks, which reflects the significant amount of soil derived from these materials in the state. The results indicate that the concentrations of Cu and Zn in South Brazilian soils are related to the geochemical composition of the rock material. So, these elements can be used to indicate the influence of different lithologies and the baseline concentration to environmental monitoring.
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