Results 141 to 150 of about 2,927,072 (293)
Tunable Mass Transport and Enhanced Electrochemical Performance of CO2 Laser Engraved Electrodes
Advanced Materials Technologies, EarlyView.This work introduces vector‐mode CO2 laser engraving as a rapid strategy to fabricate electrochemical sensors with tunable mass transport. Spiral electrodes can behave as disk electrodes, outperforming conventional raster‐engraved devices in current density and sensitivity.
Davi M. De Farias +2 more
wiley +1 more source
Revista de História, 1974 (1º parágrafo do artigo) Na literatura sobre a evolução dos conhecimentos científicos, relacionados com as ciências da terra no Brasil, raras são as informações dedicadas à história da Geomorfologia Brasileira. Nesse sentido, nem mesmo a publicação do notável simpósio sobre As ciências no Brasil (1955), organizado graças aos esforços e ao prestígio ...
openaire +3 more sources
Conducción y valor empresarial en Brasil (y Chile) [PDF]
(Disponible en idioma inglés únicamente) En este trabajo se elabora un índice de prácticas de conducción empresarial (CGI, por sus siglas en inglés) basándose en un conjunto de 24 preguntas que se pueden responder objetivamente a partir de información ...
André Carvalhal-da-Silva, Ricardo Leal
core
A new species of Anastrepha from Amazonia : with redescriptions of A. caudata Stone and A. hendeliana Lima (Diptera: Tephritidae) [PDF]
, 2003 Three species of Anastrepha from upper Amazonia are described or redescribed and illustrated. They are considered closely related and are placed in the A. caudata species group. Anastrepha caudata Stone 1942 is redescribed based on the holotype, the only
Caraballo, Josefina, Norrbom, Allen L.
core
Advanced Materials Technologies, EarlyView.Focused ion beam (FIB) patterning enables on‐chip amorphization of high‐aspect ratio MoS2 monolayers into complex geometries with tunable electrical properties. By controlling the ion dose, conductive pathways as narrow as 700 nm are formed, allowing precise modulation of local conductivity.
Matheus F. F. das Neves +8 more
wiley +1 more source
Photoredox‐Catalyzed Synthesis of a Novel Class of Fluoroalkyl Pyrazolones
Advanced Synthesis &Catalysis, EarlyView.A photoredox strategy enables regioselective synthesis of fluoroalkyl 2‐pyrazolin‐5‐ones via radical addition and cyclization. This mild, metal‐free method shows a broad substrate scope, operates in batch and flow systems, and offers a sustainable approach to fluorinated heterocycles with potential applications in medicinal chemistry.
Emanuele F. Pissinati +3 more
wiley +1 more source
Advanced Synthesis &Catalysis, EarlyView.Unleashing the power of Ag(I)‐acetylides with LiCl/dimethyl sulfoxide (DMSO). The LiCl/DMSO mixture have an unexplored ability to dramatically increase the solubility of Ag(I)‐acetylides regardless of their molecular structure, which is explored to achieve high chemoselectivity in the Cu(I)‐catalyzed interrupted cycloaddition between organic azides, Ag(
Diego Seckler +8 more
wiley +1 more source
Estudos Ibero-Americanos, 1980 As leis contra a escravatura e, finalmente, sua abolição, incentivaram a imigração de estrangeiros para substituir o escravo na produção cafeeira no fim do período imperial e inícios da República, multiplicando a população nos grandes centros urbanos, industrializando-os com mão de obra barata.
openaire +4 more sources
Advanced Sensor Research, EarlyView.An electrosynthesized protein‐imprinted polymer (poly(azo‐BBY)) enables probe‐free, real‐capacitance detection of human serum albumin at 0.02 ng mL−1 within a 0.25–3.0 ng mL−1 window. The device uses a redox‐mediator‐free architecture and maintains selectivity against common interferents, illustrating a simple, scalable route to high‐sensitivity ...
Heitor F. Trevizan +4 more
wiley +1 more source