Results 31 to 40 of about 432,216 (161)
New Vibrational Information on Simple Amides in Solution: A Case Study on GaCl3-Formamide Complexes
Journal of Spectroscopy, 2020 IR and Raman measurements were carried out for GaCl3-formamide (FA) solutions, and comparisons with the Al3+ and Fe3+ chemistry are presented. Upshifts of both νCO and νCN modes of FA are observed, and analyses of the corresponding bands suggest ...
Anna K. M. S. Gomes, Wagner A. Alves
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Caderno de aulas práticas Química Geral e Inorgânica 2020-2021
, 2020 Sebenta das Aulas Laboratoriais para disciplina de "Química Geral e Inorgânica" do ano lectivo 2020-2021info:eu-repo/semantics ...
Wang, Wenli, Rio, Carolina
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Novel Lapachol Derivatives and Their Antioxidant Activity
Natural Product Communications, 2006 A convenient synthesis of the new enamine derivatives 2-diethylamino-3-(3-methyl-2-butenyl)-1,4-naphthalenedione ( 2 ), 2-ethylamino-3-(3-methyl-2-butenyl)-1,4-naphthalenedione ( 3 ), 2-diethanolamino-3-(3-methyl-2-butenyl)-1,4-naphthalenedione ( 4 ...
João P. S. Wenceslau +6 more
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Chemical Constituents and Insecticidal Activity of (Annonaceae)
Natural Product Communications, 2008 The present work describes the isolation of dehydrodiscretamine, discretamine, liriodenine, lichexanthone, molvizarin, rolliniastatin-1, annonacin and bullatacin from roots of Rollinia leptopetala R E Fries. The structures were established after analysis
Ângela M.C. Arriaga +9 more
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Antibacterial and Antioxidant Activities of Ursolic Acid and Derivatives
Molecules, 2014 Ursolic acid, an important bioactive compound, was isolated from ethanol extract of aerial parts of Sambucus australis. In order to develop bioactive ursolic acid derivatives, two semi-synthetic compounds were obtained through modification at C-3.
Patrícia G.G. do Nascimento +7 more
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Advanced Robotics Research, EarlyView.Fuel‐free Cu2O‐based micromotors functionalized with β‐cyclodextrin actively remove bisphenol A from water under visible light. The cyclodextrin shell captures BPA and enhances micromotor motility, leading to faster degradation and higher overall removal than nonfunctionalized Cu2O and Cu2O@Au.
Luisa Natalia Cordoba Urresti +3 more
wiley +1 more source
Antimicrobial and Antioxidant Activities of the Essential Oil of Resin of
Natural Product Communications, 2006 The essential oil obtained by hydrodistillation from the fresh resin of Protium heptaphyllum was analyzed by GC/MS. The main constituents were: α-pinene (10.5%), α-phellandrene (16.7%), limonene (16.9%), and terpinolene (28.5%).
P. N. Bandeira +7 more
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Recursos per treballar a l’aula la formulació i nomenclatura de química inorgànica
Ciències, 2015 L’article presenta diversos recursos i activitats elaborats per l’autor que permeten treballar la formulació i nomenclatura de química inorgànica a les classes de química d’educació secundària i de batxillerat, seguint les darreres recomanacions ...
José Ángel Hernández Santadaríao
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Continuous‐Flow Microfluidic Synthesis Enhances C2+ Selectivity for Cu2O Catalysts
Advanced Science, EarlyView.Microfluidic devices are used to prepare Cu2O nanoparticles under laminar flow conditions, which exhibit enhanced selectivity in the CO2‐to‐C2+ reaction due to their nanoporosity and high defect concentration. Cu2O prepared using standard solution methods displays decreased CO2‐to‐C2+ selectivity due to the absence of similar properties. Altogether, we
Carlota Casas +16 more
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A 3D Printer Guide for the Development and Application of Electrochemical Cells and Devices
Frontiers in Chemistry, 2021 3D printing is a type of additive manufacturing (AM), a technology that is on the rise and works by building parts in three dimensions by the deposit of raw material layer upon layer.
Ana Luisa Silva +4 more
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