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Nutritional status of watermelon irrigated with brackish water in different planting systems
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Silva Junior, Francisco B. da
; Lacerda, Claudivan F. de
; Sousa, Geocleber G. de
; Sousa, José T. M. de
; Mendonça, Andreza de M.
; Silva, Mateus G. da
; Pereira Filho, João V.
; Santos, Max F. dos
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Revista Brasileira de Engenharia Agrícola e Ambiental
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ABSTRACT Watermelon is cultivated in practically all Brazilian states; however, there are still disagreements as to the best way to propagate it. In addition, the Northeast region, the main producing region in the country, is increasingly facing the scarcity of low-salinity water. Given this context, this study aimed to evaluate the morphophysiology and mineral contents of the watermelon crop subjected to irrigation water of different electrical conductivities, using seedlings or direct seeding. A randomized block experimental design with split plots was used, with four replications. The plot was formed by the electrical conductivities of the irrigation water (0.3, 1.5, 3.0, and 4.5 dS m-1) and the subplot by the planting methods - DS = direct seeding, TP1 = transplanting of the seedling produced with water of moderate salinity (1.5 dS m-1), and TP2 = transplanting of the seedling produced with water of low salinity (0.3 dS m-1). The highest biomass accumulation was obtained in the direct seeding method. Salt stress increases the intrinsic water use efficiency in watermelon plants. The TP1 and TP2 planting methods led to the highest contents of P and K in the leaf. The increase in the salinity level increases the content of S and reduces the content of Cu and Mn.
RESUMO A melancia é cultivada praticamente em todos os estados brasileiros; entretanto, ainda existem divergências quanto à melhor forma de propagação. Além disso, a região Nordeste, principal região produtora do país, enfrenta cada vez mais a escassez de água com baixos níveis de salinidade. Diante deste contexto, esse estudo teve como objetivo avaliar a morfofisiologia e os teores minerais na cultura da melancia submetida a diferentes condutividades elétricas da água de irrigação, utilizando-se mudas ou semeadura direta. O delineamento experimental foi em blocos ao acaso com parcelas subdivididas, com quatro repetições. A parcela foi formada pelas condutividades elétricas da água de irrigação (0,3; 1,5; 3,0; 4,5 dS m-1) e a subparcela pelos métodos de plantio - SD = semeadura direta, TP1 = transplantio da muda produzida com água de moderada salinidade (1,5 dS m-1) e TP2 = transplantio da muda produzida com água de baixa salinidade (0,3 dS m-1). O maior acúmulo de biomassa foi obtido no método de plantio por semeadura direta. O estresse salino aumenta a eficiência intrínseca do uso da água em plantas de melancia. Os métodos de plantio TP1 e TP2 apresentam os maiores valores nos teores foliares de P e K. O aumento do nível salino aumenta os teores foliares de S e reduz os teores de Cu e Mn.
2.
Germination and vigor of watermelon seeds treated with biostimulant
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Oliveira, Silvia S. C. de
; Sousa, João F. G.
; Cruz, Sihélio J. S.
; Ponciano, Vanessa de F. G.
; Bottega, Daline B.
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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.
3.
Multidisciplinary Scientific Cruises for Environmental Characterization in the Santos Basin – Methods and Sampling Design
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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
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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.
4.
Integrated UPLC-HRMS, Chemometric Tools, and Metabolomic Analysis of Forage Palm (Opuntia spp. and Nopalea spp.) to Define Biomarkers Associated with Non-Susceptibility to Carmine Cochineal (Dactylopius opuntiae)
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Matos, Thiago Kelvin B.
; Guedes, Jhonyson A. C.
; Alves Filho, Elenilson G.
; Luz, Licia R.
; Lopes, Gisele Simone
; Nascimento, Ronaldo F. do
; Sousa, João A. de
; Canuto, Kirley M.
; Brito, Edy S. de
; Dias-Pini, Nivia S.
; Zocolo, Guilherme J.
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Journal of the Brazilian Chemical Society
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Metabolomics, together with analytical methods and chemometric tools, point to new paths for selecting species that are resistant to pests and diseases. In this work, the forage palm species' metabolomic profile was investigated, and the relation between the chemical composition and resistance to Dactylopius opuntiae (carmine cochineal). The study was performed in cladodes of different non-susceptible cultivars (Nopalea cochenillifera (L.) Salm-Dyck, Opuntia stricta (Haw.), Nopalea cochenillifera and susceptible cultivar (Opuntia ficus-indica (L.) Mill.)). Metabolic profile showed 28 metabolites detected in the four species. From these total, 18 metabolites were annotated using UPLC-QTOF-MSE (ultra-performance liquid chromatography coupled with an electrospray ionization quadrupole time-of-flight mass spectrometry operating in MSE mode). By comparing the chemical profiles of non-susceptible and susceptible species through the application of chemometric tools, it was possible to obtain biomarkers (quercetin-3-O-2',6'-dirhamnosylglucoside, quercetin rhamnosyl dihexoside, and isorhamnetin-3-sophoroside-7-rhamnoside) that may be associated with resistance to carmine cochineal. Metabolomics based on UPLC-QTOF-MSE and chemometric allowed to establish the biomarkers knowledge of the resistance present in forage palm species. These results contribute to developing the initial understanding of flavonoids' role in the defense mechanisms of cactaceans and can be useful for application in breeding programs; it can increase the chances of success in creating new varieties of plants not susceptible to carmine cochineal.
https://doi.org/10.21577/0103-5053.20210060
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5.
Malacofauna of lotic environments in the Northeast and Brazilian semiarid region: current knowledge and new records
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LEAL, MANUELLA F.
; SIMONE, LUIZ RICARDO L.
; CASTRO, EMERSON S.
; SANTOS, ORIANNA DOS
; SILVA, ANTÔNIA R.V. DA
; DANTAS, KARINA K.S.
; SOUSA, JOÃO H. DE
; SILVA, EDSON L. DA
; PINHEIRO, TAMARIS G.
; LACERDA, ANA CAROLINA F.
.
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Abstract Despite the great diversity, economic and environmental importance of limnic mollusks, the group is still little investigated in the Brazilian semiarid region, especially in the state of Piauí. Thus, this work aims to gather information on the diversity of limnic mollusks in the Brazilian Northeast and the semiarid region, including new records for the state of Piauí, northeastern Brazil. For this, collections in the urban perimeter of the Itaim and Guaribas Rivers, municipalities of Itainópolis, and Picos, respectively, between October 2017 and September 2019. Besides, a literature review was conducted on studies of malacofauna in the Northeast and the Brazilian semiarid region. A total of 11 species from the classes Gastropoda and Bivalvia were collected on the rivers of Piauí, being the first record of Uncancylus concentricus for the Northeast region. For lotic environments in the state of Piauí, Drepanotrema schubarti, Pomacea canaliculata, Pisidium dorbignyi and Stenophysa marmorata were registered for the first time. Then, it was possible to verify that the Northeast of Brazil has 71 species registered, of which 34 occur in the semiarid. The diversity of species surveyed and the first record of the occurrence of several of them for the semiarid region demonstrate the importance of expanding studies involving this group to other areas. The present study is the first to gather and increase the information available on the fauna of limnic mollusks for the Northeast and Brazilian semiarid regions. The information gathered here may contribute to future research and to the species conservation and the environments they occupy, especially considering the presence of non- native and vector species.
https://doi.org/10.1590/0001-3765202120210140
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6.
Cross-cultural adaptation of the Internet Gaming Disorder Scale – Short Form (IGDS9-SF) to the Brazilian context
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Donadon, Mariana F.
; Chagas, Marcos H. N.
; Apolinário-da-Silva, Thiago D.
; Okino, Erika T. K.
; Hallak, Jaime E. C.
; Nicoletti, Êdela A.
; Pereira-Lima, Karina
; Degan, Edson A.
; Santos, Rafael G.
; Machado-de-Sousa, João Paulo
; Simei, João L. Q.
; Oliveira, Lucas M.
; Pontes, Halley M.
; Osório, Flávia L.
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Trends in Psychiatry and Psychotherapy
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Abstract Introduction The Internet Gaming Disorder Scale – Short Form (IGDS9-SF) assesses the severity, harmful effects and/or consequences of excessive online and offline gaming. Its conciseness and theoretical foundations on current diagnostic criteria of gaming disorders make it a useful resource for clinical and screening settings. Objective To describe the process of cross-cultural adaptation of the IGDS9-SF to the Brazilian context. Methods The cross-cultural adaptation involved the steps of independent translation of the instrument, synthesis version, back-translation, pre-test and elaboration of the final version. Content validity assessment was conducted by a multidisciplinary committee of experts and consisted of both a quantitative analysis (calculation of content validity coefficients – CVC) and a qualitative analysis (assessment of the experts’ comments and suggestions). The pre-test sample consisted of 30 gamers with variable sociodemographic characteristics. Results The cross-cultural adaptation of the scale followed the proposed protocol, and the CVC was satisfactory (≥ 0.83) for all the structures and equivalences assessed. Most of the suggestions made by the experts were accepted (mainly adjustments and language standardization). The gamers who participated in the pre-test judged the scale easy to understand and did not suggest changes. Discussion The Brazilian version of the IGDS9-SF showed adequate content validity and is available for researchers and clinicians, as well as for the investigation of additional psychometric characteristics.
https://doi.org/10.1590/2237-6089-2019-0032
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7.
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.
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; Goldenberg, Renato
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; Rodrigues, Vinícius T.
; Rodrigues, William
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; Sobral, Marcos
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; Souza, Marcelo
; Souza, Maria L.D.R.
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; Stehmann, João R.
; Steinmann, Victor
; Takeuchi, Cátia
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; Teles, Aristônio M.
; Temponi, Lívia G.
; Terra-Araujo, Mário H.
; Thode, Veronica
; Thomas, W.Wayt
; Tissot-Squalli, Mara L.
; Torke, Benjamin M.
; Torres, Roseli B.
; Tozzi, Ana M.G.A.
; Trad, Rafaela J.
; Trevisan, Rafael
; Trovó, Marcelo
; Valls, José F.M.
; Vaz, Angela M.S.F.
; Versieux, Leonardo
; Viana, Pedro L.
; Vianna Filho, Marcelo D.M.
; Vieira, Ana O.S.
; Vieira, Diego D.
; Vignoli-Silva, Márcia
; Vilar, Thaisa
; Vinhos, Franklin
; Wallnöfer, Bruno
; Wanderley, Maria G.L.
; Wasshausen, Dieter
; Watanabe, Maurício T.C.
; Weigend, Maximilian
; Welker, Cassiano A.D.
; Woodgyer, Elizabeth
; Xifreda, Cecilia C.
; Yamamoto, Kikyo
; Zanin, Ana
; Zenni, Rafael D.
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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
33340 downloads
8.
Leishmanicidal galloylquinic acids are noncompetitive inhibitors of arginase
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Sousa, Lorena R. F. de
; Ramalho, Suelem D.
; Fernandes, João B.
; Silva, Maria Fátima das G. F. da
; Iemma, Mônica R. da C.
; Corrêa, Caroindes J.
; Souza, Dulce H. F. de
; Lima, Maria I. S.
; Vieira, Paulo C.
.
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Journal of the Brazilian Chemical Society
- Métricas do periódico
Ácidos galoilquínicos, substâncias que têm apresentado atividade leishmanicida, foram isolados do extrato de acetato de etila da planta Byrsonima coccolobifolia. Estes compostos fenólicos juntamente com o ácido gálico demonstraram ser uma nova classe de inibidores não-competitivos potentes em arginase (ARG) de Leishmania amazonensis (Ki variando de 0,10 a 0,68 µmol L-1). O ácido quínico não apresentou atividade inibitória significativa em ARG demonstrando que a unidade galoila tem características importantes que permitem a interação enzima-inibidor. A atividade inibitória significativa do ácido gálico frente à ARG pode ser uma indicação para o entendimento da resposta imune previamente observada em Leishmania donovani, uma vez que a atividade enzimática da arginase está associada à diminuição dos níveis de NO no processo de infecção por Leishmania.
Leishmanicidal galloylquinic acids were isolated from the ethyl acetate extract of Byrsonima coccolobifolia. These phenols and gallic acid showed to be a new class of potent noncompetitive inhibitors of arginase ARG (Ki ranging from 0.10 to 0.68 µmol L-1) from Leishmania amazonensis. Quinic acid did not exhibit significant inhibition of ARG, indicating that galloyl moiety has important features that allows the enzyme-inhibitor interactions. The significant inhibitory activity of gallic acid on ARG can be a clue to understand the immune response previously observed on L. donovani, since ARG activity is associated with the decrease of the levels of NO in Leishmania infection.
https://doi.org/10.5935/0103-5053.20140115
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9.
Pterodon pubescens benth: stability study of microencapsulated extract and isolated compounds monitored by antinociceptive assays
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Servat, Leila
; Spindola, Humberto M.
; Rodrigues, Rodney A. F.
; Sousa, Ilza M. O.
; Ruiz, Ana L. T. G.
; Carvalho, João E. de
; Foglio, Mary A.
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Journal of the Brazilian Chemical Society
- Métricas do periódico
As sementes de Pterodon pubescens Benth. (Pp), disponíveis comercialmente no Brasil, são utilizadas na medicina popular em preparações anti-inflamatórias, analgésicas e anti-reumáticas. O presente estudo demonstrou as propriedades antinociceptivas da mistura de isômeros 6α-hidroxi-7β-acetoxi-vouacapano-17β-oato de metila e 6α-acetoxi-7β-hidroxi-vouacapano-17β-oato de metila (C1) isolada de Pp, empregando modelos experimentais diferentes. Um estudo de estabilidade foi realizado para investigar a relação da microencapsulação por "spray-drying" na manutenção do efeito antinociceptivo. Para isso, amostras de C1 e extrato de Pp foram monitorados no estudo de estabilidade acelerada, avaliando tanto amostras microencapsuladas como não microencapsuladas. Foi observado que a amostra C1 possui atividade antinociceptiva, revelada pelos ensaios das contorções abdominais e de formalina; foi observada também atividade significativa antialodínica, mas não efeito anti-hiperalgésico. A microencapsulação manteve a atividade e integridade de C1 e do extrato bruto de Pp, demonstrando que a microencapsulação por "spray drying" é uma alternativa útil para aumentar o tempo de prateleira.
Pterodon pubescens Benth. (Pp) seeds, commercially available in Brazil, are used in folk medicine in anti-inflammatory, analgesic, and anti-rheumatic preparations. The present study demonstrated the antinociceptive properties of isomers 6α-hydroxy-7β-acetoxy-vouacapan-17β-oate methyl ester and 6α-acetoxy-7β-hydroxy-vouacapan-17β-oate methyl ester (C1), isolated from (Pp), employing different experimental models. A stability study was performed to investigate the relationship of microencapsulation by spray-drying on the maintenance of antinociceptive action. Therefore, C1 and Pp extract samples were monitored in accelerated stability study, evaluating both microencapsulated and non-microencapsulated samples. It was observed that sample C1 possess antinociceptive activity revealed by writhing and formalin tests; C1 showed significantly anti-allodynic, but not antihyperalgesic effect; the microencapsulation maintained the activity and integrity of both, sample C1 and Pp crude extract; microencapsulation by spray drying is a useful alternative to increase shelf life.
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10.
Produção de matéria seca e trocas gasosas em cultivares de mamoneira sob níveis de irrigação
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Freitas, Cley A. S. de
; Silva, Alexandre R. A. da
; Bezerra, Francisco M. L.
; Lacerda, Claudivan F. de
; Pereira Filho, João V.
; Sousa, Geocleber G. de
.
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Revista Brasileira de Engenharia Agrícola e Ambiental
- Métricas do periódico
Este trabalho teve o objetivo de avaliar os efeitos de cinco níveis de irrigação por gotejamento, em três cultivares de mamoneira (IAC Guarani, Mirante 10 e BRS Paraguaçu) mediante a quantificação da produção de matéria seca pelas diferentes partes da planta (limbo foliar, caule e pecíolo) e a mensuração das trocas gasosas (fotossíntese, condutância estomática e transpiração). O experimento foi conduzido no campo, na Fazenda Experimental Vale do Curu, Pentecoste, CE, sob delineamento experimental em blocos casualizados com parcelas subdivididas, em esquema fatorial 5 x 3 e com três repetições. Os tratamentos foram cinco lâminas de irrigação (25, 50, 75, 100 e 125% da evaporação do tanque Classe "A") e três cultivares. Os diferentes níveis de irrigação influenciaram as variáveis: massa seca do pecíolo, condutância estomática e fotossíntese; os valores máximos para essas variáveis foram obtidos com o nível de irrigação correspondente a 125% da evaporação no tanque Classe A. Houve uma resposta diferenciada na produção de biomassa e nas trocas gasosas entre as três cultivares avaliadas em todas as variáveis estudadas, exceto na massa seca do pecíolo.
This study was aimed at evaluating the effects of five levels of drip irrigation in three castor bean cultivars (IAC Guarani, Mirante 10 and BRS Paraguaçu) by measuring the dry mass production by the different plant parts (leaf blade, petiole and plant stem) as well as by measuring the gas exchange processes (photosynthesis, stomatal conductance and transpiration). The experiment was conducted in the field, at the Fazenda Experimental, Vale do Curu, Pentecoste, Ceará (Br). The experiment was conducted in a randomized blocks in a 5x3 factorial scheme, in split plots with three repetitions. The treatments were five irrigation levels (25, 50, 75, 100 and 125% of the class "A" pan evaporation (CAE) applied to the three cultivars. The different irrigation levels influenced the variables: petiole dry mass, stomatal conductance and photosynthesis, and maximum values for these variables were obtained with irrigation level corresponding to 125% of the Class A pan evaporation. There was a different response in biomass production and gas exchanges from each of the three cultivars, in all variables, except in petiole dry mass.
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11.
Furanoditerpenes from Pterodon pubescens benth with selective in vitro anticancer activity for prostate cell line
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Spindola, Humberto M.
; Carvalho, João E. de
; Ruiz, Ana Lúcia T. G.
; Rodrigues, Rodney A. F.
; Denny, Carina
; Sousa, Ilza M. de Oliveira
; Tamashiro, Jorge Y.
; Foglio, Mary Ann
.
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Journal of the Brazilian Chemical Society
- Métricas do periódico
O fracionamento biomonitorado do extrato diclorometânico das sementes de Pterodon pubescens Benth forneceu o 6α-acetóxi-7β-hidróxi-vouacapano 1 (inédito), além de quatro diterpenos furânicos (2, 3, 4 e 5). A atividade antiproliferativa dos compostos foi avaliada in vitro contra as linhagens de células tumorais humanas UACC-62 (melanoma), MCF-7 (mama), NCI-H460 (pulmão), OVCAR-03 (ovário), PC-3 (próstata), HT-29 (colon), 786-0 (rim), K562 (leucemia) e NCI-ADR/RES (ovário com fenótipo de resistência a múltiplos fármacos). Os resultados foram expressos em três concentrações efetivas GI50 (concentração para que ocorra 50% de inibição de crescimento), TGI (concentração que resulta em inibição total de crescimento) e LC50 (concentração que resulta em 50% de morte celular). A citotoxicidade in vitro foi avaliada também frente a uma linhagem de célula murina normal (3T3). Este é o primeiro relato de atividade anticâncer para os compostos 1, 4 e 5, que apresentaram grande seletividade, dependente da concentração, para PC-3. O composto 1 foi 26 vezes mais potente para inibir 50% do crescimento (GI50) de PC-3, 15 vezes mais citostático (TGI) e 6 vezes menos tóxico (LC50) quando comparado com Doxorrubicina (controle).
Activity guided fractionation of Pterodon pubescens Benth. methylene chloride-soluble fraction afforded novel 6α-acetoxi 7β-hydroxy-vouacapan 1 and four known diterpene furans 2, 3, 4, 5. The compounds were evaluated for in vitro cytotoxic activities against human normal cells and tumour cell lines UACC-62 (melanoma), MCF-7 (breast), NCI-H460 (lung, non-small cells), OVCAR-03 (ovarian), PC-3 (prostate), HT-29 (colon), 786-0 (renal), K562 (leukemia) and NCI-ADR/RES (ovarian expressing phenotype multiple drugs resistance). Results were expressed by three concentration dependent parameters GI50 (concentration that produces 50% growth inhibition), TGI (concentration that produces total growth inhibition or cytostatic effect) and LC50 (concentration that produces -50% growth, a cytotoxicity parameter). Also, in vitro cytotoxicity was evaluated against 3T3 cell line (mouse embryonic fibroblasts). Antiproliferative properties of compounds 1, 4 and 5 are herein reported for the first time. These compounds showed selectivity in a concentration-dependent way against human PC-3. Compound 1 demonstrated selectivity 26 fold more potent than the positive control, doxorubicin, for PC-3 (prostrate) cell line based on GI50 values, causing cytostatic effect (TGI value) at a concentration fifteen times less than positive control. Moreover comparison of 50% lethal concentration (LC50 value) with positive control (doxorubicin) suggested that compound 1 was less toxic.
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12.
I Diretrizes do Grupo de Estudos em Cardiogeriatria da Sociedade Brasileira de Cardiologia
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Franken, Roberto Alexandre
; Taddei, Cláudia F. Gravina
; Maia, Ivan Gonçalves
; Batlouni, Michel
; Sousa, J.Eduardo Moraes Rego
; Wajngarten, Maurício
; Feitosa, Gilson Soares
; Lorga, Adalberto
; Paola, Angelo de
; Scatolini Neto, Argemiro
; Halperin, Cidio
; Moreira, Dalmo
; Hachul, Denise
; Savioli, Felicio
; Atiê, Jacob
; Gagliardi, Rubens
; Avezum, Alvaro
; Bocchi, Edimar A.
; Dohmann, Hans J. F.
; Pereira Filho, Ilnei
; Saraiva, J. Francisco Kerr
; Bodanese, Luis C.
; Leal, Marcelo Garcia
; Afiune Neto, Abrahão
; Libberman, Alberto
; Sousa, Amanda G. M. R.
; Sousa, Antonio Carlos S.
; Caramelli, Bruno
; Geraldez, Roberto R.C.
; Brandão, Airton P.
; Markman Filho, Brivaldo
; Amodeo, Celso
; Ferreira, Celso
; Souza Filho, João
; Siqueira, J Eduardo
; Gonçalves Júnior, Iran
; Makdisse, Marcia P.
; Luna, Rafael L
; Rosa, Ronaldo F.
; Luis, Carlos de Camargo
; Freitas, Elizabete Viana
; Tarasoutchi, Flávio
; Pierri, Humberto
; Santos, Silvio Carlos de M.
; Meneghello, Zilda M.
; Magalhães, Carlos C.
; Nasri, Fabio
; Gus, Iseu
; Borges, Jairo
; Serro Azul, João Batista
; Aldrighi, José M.
; Ghorayeb, Nabil
; Grespan, Stela Maris
.
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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 |