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95 resultados encontrados.

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A Rigorous Mathematical Formulation for the Scheduling of Tree-Structure Pipeline Networks
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Cafaro, Diego Carlos et al · American Chemical Society · 2011 · ISSN 5064-5085
Pipeline networks are the dominant mode of conveying a wide variety of oil refined products from refineries to distribution terminals. Pipeline infrastructure usually comprises trunk lines serving high-volume, long-haul ...
Idioma eng
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Open Access
Assessing the Photoinduced Electron-Donating Behavior of Carbon Nanodots in Nanoconjugates
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Ferrer Ruíz, Andrés et al · American Chemical Society · 2020 · ISSN 0002-7863
Carbon nanodots (CNDs) undergo electron transfer in different scenarios. Previous studies have mainly focused on the electron-accepting features of CNDs in covalently linked donor-acceptor nanoconjugates. In view of this...
Idioma eng
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Could Electronic Anapolar Interactions Drive Enantioselective Syntheses in Strongly Nonuniform Magnetic Fields?: A Computational Study
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Pagola, Gabriel Ignacio et al · American Chemical Society · 2019 · ISSN 1549-9618
It is shown that the anapolar interaction of the electrons of a molecule with an external uniform magnetic field B and a uniform curl C = × B′ determines different thermodynamic stabilization of the ground state for t...
Idioma eng
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Current Response Enhancement According to the Doping Anion’s Nature in Redox Polyelectrolyte─Enzyme Assemblies
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Coria Oriundo, Lucy Linders et al · American Chemical Society · 2022 · ISSN 7759-7769
High-power density output in enzymatic fuel cells is a key feature to reduce the size of self-powered implantable medical devices. Electron transfer mediated through redox polyelectrolytes allows the transport of electro...
Idioma eng
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Diminished Fluid Transport through Carbon Nanochannels Induced by COOH Functionalization: Implications for Nanofiltration and Oil Recovery
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Martin Ramirez, Mariano Esteban et al · American Chemical Society · 2021 · ISSN 2574-0970
Fluid transport on confined systems is a subject of theoretical and technological interest. For instance, remarkable high flow rates have been obtained in carbon nanochannels (CNs) which cannot be predicted by standard m...
Idioma eng
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Directional Drying in Bilayer Porous Films: Funnel vs Ink-Bottle Geometries
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Cencha, Luisa Guadalupe et al · American Chemical Society · 2025 · ISSN 0743-7463
We investigate the drying dynamics of mesoporous silicon bilayers with controlled pore geometries during ethanol evaporation. Using Reflective Interferometric Fourier Transform Spectroscopy (RIFTS), we track the evolutio...
Idioma eng
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Effect of Ag+ on the Excited-State Properties of a Gas-Phase (Cytosine)2Ag+ Complex: Electronic Transition and Estimated Lifetime
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Berdakin, Matias et al · American Chemical Society · 2014 · ISSN 2295-2301
Recently, DNA molecules have received great attention because of their potential applications in material science. One interesting example is the production of highly fluorescent and tunable DNA–Agn clusters with cytos...
Idioma eng
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Interfacial Hyperactivation of Candida rugosa Lipase onto Ca2Fe2O5 Nanoparticles: pH and Ionic Strength Fine-Tuning to Modulate Protein-Support Interactions
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Morales, Andrés Hernán et al · American Chemical Society · 2023 · ISSN 0743-7463
The current study provides a comprehensive look of the adsorption process of Candida rugosa lipase (CRL) on Ca2Fe2O5 iron oxide nanoparticles (NPs). Protein-support interactions were identified across a broad range of pH...
Idioma eng
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Maximum Electrical Conductivity of Associated Lithium Salts in Solvents for Lithium-Air Batteries
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Horwitz, Gabriela et al · American Chemical Society · 2019 · ISSN 1932-7447
The choice of optimal electrolytes is crucial for improving the electrochemical performance of a lithium air battery because it determines the morphology of the discharge products in the cathode and the conductivity of t...
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Monolithic stirrer reactor: Performance in the partial hydrogenation of sunflower oil
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Boldrini, Diego Emmanuel et al · American Chemical Society · 2012 · ISSN 0888-5885
In the present paper, the performance of monolithic catalysts obtained from a catalytic converter was analyzed in the partial hydrogenation of sunflower oil. The monoliths were reimpregnated with palladium and installed ...
Idioma eng
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Novel heterometallic uranyl-transition metal materials: Structure, topology, and solid state photoluminescence properties
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Gomez, Germán Ernesto et al · American Chemical Society · 2019 · ISSN 7243-7254
Six new uranyl hybrid materials have been synthesized solvothermally utilizing the ligands 2,2′-bipyridine-3,3′-dicarboxylic acid (H2L) and 2,2′:6′,2′′-terpyridine (TPY). The six compounds are classified as e...
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Outer-Sphere Contributions to the Electronic Structure of Type Zero Copper Proteins
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Lancaster, Kyle M. et al · American Chemical Society · 2012 · ISSN 8241-8253
Bioinorganic canon states that active-site thiolate coordination promotes rapid electron transfer (ET) to and from type 1 copper proteins. In recent work, we have found that copper ET sites in proteins also can be constr...
Idioma eng
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Phase Equilibria of CO2 + n-Alkane Binary Systems in Wide Ranges of Conditions: Development of Predictive Correlations Based on Cubic Mixing Rules
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Cismondi Duarte, Martín et al · American Chemical Society · 2012 · ISSN 6232-6250
The phase equilibria of binary CO2 + n-alkane mixtures have been studied by an important number of authors, both experimentally and using different types of thermodynamic models. Modeling studies of the phase behavior of...
Idioma eng
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Photoinduced one-electron oxidation of Aromatic Selenides: Effect of the structure on the reversible dimerization reaction
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Bouchet, Lydia María et al · American Chemical Society · 2018 · ISSN 5674-5680
The photochemical one-electron oxidation of alkyl aryl selenides was studied by means of laser flash photolysis (355 nm). Quenching of the sensitizers in their excited state leads to selenide radical cation in the presen...
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QSAR Study of Biologically Active Essential Oils against Beetles Infesting the Walnut in Catamarca, Argentina
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Comelli, Nieves Carolina et al · American Chemical Society · 2018 · ISSN 0021-8561
Essential oils from six species of aromatic plants collected in the Catamarca Province of Argentina were evaluated for their chemical composition and repellent and insecticidal activities against beetles of the genus Car...
Idioma eng
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Rhodium(II)-Catalyzed Enantioselective Intermolecular Aziridination of Alkenes
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Boquet, Vincent et al · American Chemical Society · 2022 · ISSN 0002-7863
C4-Symmetrical dirhodium(II) tetracarboxylates are highly efficient catalysts for the asymmetric intermolecular aziridination of substituted alkenes with sulfamates. The reaction proceeds with high levels of efficiency a...
Idioma eng
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Single Crystal EPR of the Mixed-Ligand Complex of Copper(II) with l -Glutamic Acid and 1,10-Phenanthroline: A Study on the Narrowing of the Hyperfine Structure by Exchange
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Neuman, Nicolás Ignacio et al · American Chemical Society · 2012 · ISSN 1089-5639
We report an EPR study at X- and Q-bands of polycrystalline and single crystal samples of the mixed copper(II) complex with L-glutamic acid (glu) and 1,10-phenantroline (phen), [Cu(glu)(phen)(H2O)]+ NO3 −·2(H2O). The ...
Idioma eng
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Untangling the Effect of Carbonaceous Materials on the Photoelectrochemical Performance of BaTaO2N
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Hojamberdiev, Mirabbos et al · American Chemical Society · 2024 · ISSN 7022-7033
The water oxidation reaction is a rate-determining step in solar water splitting. The number of surviving photoexcited holes is one of the most influencing factors affecting the photoelectrochemical water oxidation effic...
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Charge-transfer dynamics of fluorescent dye-sensitized electrodes under applied biases
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Godin, Robert et al · American Chemical Society · 2015 · ISSN 2688-2693
The development of dye-sensitized solar cells requires an in-depth understanding of the interfacial charge-transfer dynamics that take place between dye sensitizers and semiconductors. Here, we describe a prototype syste...
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Colloidal stability of bovine calcium caseinate suspensions. effect of protein concentration and the presence of sucrose and lactose
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Mancilla Canales, Manuel Arturo et al · American Chemical Society · 2010 · ISSN 2550-2557
Sodium caseinate suspensions (Cas) are stabilized as submicelles in a dynamic system consisting of caseins α, β, and κ. Their use in the food industry is quite widespread because of their functional properties and nut...
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Controlling the Band Gap in Zigzag Graphene Nanoribbons with an Electric Field Induced by a Polar Molecule
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Dalosto, Sergio Daniel et al · American Chemical Society · 2008 · ISSN 8196-8199
Graphene nanoribbons with both armchair- and zigzag-shaped hydrogen-passivated edges (AGNR and ZGNR) have band gaps which depend on the width of the ribbon. In particular, a ZGNR has localized electronic states at the ed...
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Effect Of The Solvent Used During Preparation On The Properties Of Pt/Al 2 O 3 And Pt−Sn/Al 2 O 3 Catalysts
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Carvalho, Luciene S. et al · American Chemical Society · 2001 · ISSN 5557-5563
The influence of the solvent (water, acetone, and ethanol) used during alumina impregnation on the properties of Pt/Al2O3 and Pt−Sn/Al2O3 catalysts was studied. Catalysts were characterized by H2 chemisorption, TEM, te...
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Effect of light intensity on the aggregation behavior of primary particles during in situ photochemical synthesis of gold/polymer nanocomposites
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Schmarsow, Ruth Noemí et al · American Chemical Society · 2020 · ISSN 0743-7463
Metal/polymer nanocomposites have attracted much attention in recent years due to their exceptional properties and wide range of potential applications. A key challenge to obtain these materials is to stabilize the metal...
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