Results 51 to 60 of about 964,181 (326)

Copper Doping Enhances the Activity and Selectivity of Atomically Precise Ag44 Nanoclusters for Photocatalytic CO2 Reduction

open access: yesAdvanced Functional Materials, EarlyView.
By a simple anti‐Galvanic reaction, up to six copper atoms could be preferably doped into the Ag2(SR)5 staple motifs and Ag20 dodecahedral shell of an atomically precise Ag44(SR)30 nanocluster. When anatase TiO2 is used as substrate, the (AgCu)44/TiO2 photocatalyst exhibited much improved activity in photocatalytic CO2 reduction compared to Ag44/TiO2 ...
Ye Liu   +5 more
wiley   +1 more source

Metric Conflict in Financial Analysis: A Comparison and Application of EBITDA and EVA

open access: yesMuhasebe Enstitüsü Dergisi
The aim of this study is to examine the differences and similarities between economic value added (EVA) and earnings before interest, depreciation, and taxes (EBITDA), two metrics commonly used in financial performance measurement.
Hasan Yalçın
doaj   +1 more source

Prospects of Electric Field Control in Perpendicular Magnetic Tunnel Junctions and Emerging 2D Spintronics for Ultralow Energy Memory and Logic Devices

open access: yesAdvanced Functional Materials, EarlyView.
Electric control of magnetic tunnel junctions offers a path to drastically reduce the energy requirements of the device. Electric field control of magnetization can be realized in a multitude of ways. These mechanisms can be integrated into existing spintronic devices to further reduce the operational energy.
Will Echtenkamp   +7 more
wiley   +1 more source

La presencia del pH vaginal normal descarta el diagnóstico de la vaginosis bacteriana?

open access: yesDST, 2005
Introdución: la Vaginosis Bacteriana (VB) es una infección vaginal caracterizada por una alteración del medio ambiente vaginal con disminución en el contenido vaginal de Lactobacillus spp. e incremento de microorganismos Anaerobios, Gardenella vaginalis,
Miguel Tilli   +5 more
doaj  

EVA (Company and Shareholder Value Indicator)

open access: yesMercados y Negocios
Economic Value Added (EVA) originates as a value-based measure of performance, comparing the profitability obtained by a company with the opportunity cost of capital used to support its tangible and intangible resources.
Juan Gaytán Cortés
doaj   +1 more source

Evaluation of IEEE802.15.4g for Environmental Observations

open access: yesSensors, 2018
IEEE802.15.4g is a low-power wireless standard initially designed for Smart Utility Networks, i.e., for connecting smart meters. IEEE802.15.4g operates at sub-GHz frequencies to offer 2–3× longer communication range compared to its 2.4 GHz ...
Jonathan Muñoz   +3 more
doaj   +1 more source

Enhanced Efficiency and Stability of Carbon‐Based Perovskite Solar Cells by Eva Interface Engineering

open access: yesAdvanced Materials Interfaces, 2022
Nanocrystalline tin (IV) oxide (SnO2) as an electron‐transport layer (ETL) has unique advantages in realizing highly efficient and stable planar perovskite solar cells (PSCs), especially showing great potential in the low‐temperature preparation of large‐
Haobin Wang   +4 more
doaj   +1 more source

Evaluación de la contractilidad del ventrículo izquierdo en pacientes con estenosis aórtica grave, flujo bajo, gradiente bajo y fracción de expulsión preservada

open access: yesArchivos de Cardiología de México, 2022
Introducción: En la estenosis aórtica grave con gradiente bajo, fracción de expulsión preservada (≥ 50%) y flujo bajo (GB/FBp), la disminución del índice de volumen sistólico (IVS) podría deberse a una reducción de la contractilidad.
Ricardo A. Migliore   +4 more
doaj   +1 more source

Flexibility and Dynamicity Enhances and Controls Supramolecular Self‐Assembly of Zinc(II) Metallogels

open access: yesAdvanced Functional Materials, EarlyView.
Zinc(II) coordination complexes with tunable aryloxy‐imine ligands exhibit controllable supramolecular self‐assembly into hierarchical fibrous structures. Coordination‐driven stacking, not π–π interactions, enables gelation, dynamic assembly/disassembly, and enhanced nanomechanical properties.
Merlin R. Stühler   +10 more
wiley   +1 more source

Validación clinica de um guante conindicador de pH (vagitest®) para la aproximación diagnóstica de las infecciones vaginales

open access: yesDST, 2007
Introdução: as infecções cervicovaginais (CV) possuem relevância devido a suas potenciais complicações, tanto em pacientes obstétricas quantoem ginecológicas.
Miguel Tilli   +4 more
doaj  

Home - About - Disclaimer - Privacy