Results 21 to 30 of about 575,811 (166)

Reactor para síntese química com aquecimento óhmico, método e suas aplicações [PDF]

, 2013
O presente invento refere-se a um reactor com aquecimento óhmico para síntese química. Este método de aquecimento tem aplicação desde a síntese orgânica à inorgânica, preparação de materiais organo-metálicos, síntese de nanopartículas e de polímeros.
Cavaleiro, J. A. S., Costa, J. C. S., Enes, R. F., Morais, A., Pinto, J. F. G., Santos, L. N. B. S., Silva, A. M. G., Silva, A. M. S., Silva, V. L. M., Teixeira, J. A., Vicente, A. A.   +10 more
core  

Engaging the public in plant science: Communication facilitators and barriers of scaling up a citizen science campaign

People and Nature, EarlyView.
Abstract Volunteers have been involved in nature observations for decades through citizen science initiatives, providing large data sets as well as problem identification that allow a more complete understanding of many natural phenomena. Although communication is a core component in citizen science, the key factors that determine its effectiveness in ...
Kristiina Gibson, Monika Suškevičs, Baiba Prūse, Marta Barberis, Sara A. O. Cousins, Živa Fišer, Margaux Julien, Marianne Kivastik, Marcin Klisz, Attila Lengyel, Zuzana Münzbergová, Radosław Puchałka, Iris Reinula, Froukje Rienks, Julie Koch Sheard, Viktor Siverin, Bojana Stojanova, Sabrina Träger, Tsipe Aavik   +18 more
wiley   +1 more source

Alumina ceramics obtained by chemical synthesis using conventional and microwave sintering Cerâmicas de alumina obtidas por síntese química e sinterizadas em forno convencional e por microondas

Cerâmica, 2011
It is well known that the heating mechanism and powder precursor define the microstructural characteristics of ceramics. Especially abnormal grain growth of pure alumina ceramics developed during conventional sintering method suggests that this material ...
D. Thomazini, M. V. Gelfuso, A. S. A. Chinelatto, A. L. Chinelatto, F. K. Sanson, F. Teixeira Neto   +5 more
doaj   +1 more source

Visible light-promoted synthesis of 2-aryl-(3-organoselanyl)thieno[2,3-b]pyridines

Green Chemistry Letters and Reviews, 2022
We describe a simple and environment-friendly visible light-promoted protocol to access 2-aryl-(3-organoselanyl)thieno[2,3-b]pyridines, through the selenocyclization of 3-(arylethynyl)-2-(alkylthio)pyridines in the presence of diorganyl diselenides as ...
Ricardo Hellwig Bartz, Thiago Jacobsen Peglow, Filipe Penteado, Raquel Guimarães Jacob, Eder João Lenardão, Gelson Perin   +5 more
doaj   +1 more source

Concepções de síntese no estudo deleuzeano de Hume [PDF]

, 2013
Com o intuito de salientar o lugar que a leitura de Hume tem dentro da obra de Deleuze, notadamente durante sua produção filosófica dos anos 1950 e 1960, interessa-nos descrever as principais concepções de síntese que o francês propõe em “Empirismo e ...
Cardoso Jr., Helio Rebello, Montenegro Vargas, Gonzalo Patricio   +1 more
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Dimethyl‐, Diethyl‐, and Propylene Carbonates: An Emerging Class of Green Solvents for Organic Synthesis

The Chemical Record, EarlyView.
This review highlights recent advances in the use of organic carbonates, dimethyl carbonate (DMC), diethyl carbonate (DEC), and propylene carbonate (PC), as solvents in organic synthesis. Based on over seventy studies from the past 6 years, it shows their application in different organic reaction types, emphasizing their role in safer and more ...
Gabriela T. Quadros, Livia C. L. Valente, Thiago Barcellos, Daniela Hartwig, Laura Abenante, Eder J. Lenardão   +5 more
wiley   +1 more source

Taxonomic and functional diversity of urban bees of the world

Conservation Biology, EarlyView.
Abstract Bees play a pivotal role in terrestrial environments. Urbanization can affect these organisms and the ecosystem services they provide. However, knowledge of the global diversity of urban bees is limited. Thus, we summarized data on urban bee species identities and occurrences; compared distributions of all bees with those found in urban ...
João C. F. Cardoso, Pietro K. Maruyama, Ingrid N. Gomes, Lorena B. Valadão‐Mendes, Victor H. D. Silva, Larissa Lorraine, Jordana O. Borges, Rogério V. Gonçalves, Léo C. Rocha‐Filho, Renata Trevizan, Yasmine Antonini   +10 more
wiley   +1 more source

Preparation of lanthanum ferrite powder at low temperature Preparação de pó de ferrita de lantânio a baixa temperatura

Cerâmica, 2012
Single lanthanum ferrite phase was successfully prepared at low processing temperature using the polymerizable complex method. To implement this work, several techniques such as differential scanning calorimetry, X-ray diffraction, Fourier Transform ...
R. Andoulsi, K. Horchani-Naifer, M. Férid   +2 more
doaj   +1 more source

Selenonium Salt as a Catalyst for Nucleophilic Substitution Reactions in Water: Synthesis of Thiocyanites and Selenocyanates

Molecules, 2023
Organothiocyanates and selenocyanates are valuable compounds, both in terms of functional group interconversion and due to their biological activities. In this contribution, we report the synthesis of a series of these important substances in a mixture ...
Alix Y. Bastidas Ángel, Philipe Raphael O. Campos, Eduardo E. Alberto   +2 more
doaj   +1 more source

Instrumentos que avaliam a mobilidade de crianças e adolescentes com transtorno do espectro autista: Uma revisão sistemática e mapa de decisão

Developmental Medicine &Child Neurology, EarlyView.
Objetivos Identificar os instrumentos padronizados usados para avaliar aspectos de mobilidade em crianças e adolescentes com transtorno do espectro autista (TEA), analisar a qualidade de suas propriedades psicométricas e seu nível de evidência, e desenvolver um mapa de decisão clínica para esses instrumentos.
Arthur Felipe Barroso de Lima, Amanda Cristina Fernandes, Amanda Alves Rodrigues Soares, Hércules Ribeiro Leite, Ricardo Rodrigues de Sousa Junior   +4 more
wiley   +1 more source