Results 91 to 100 of about 785,950 (211)

Levels of essential and non-essential metals in Rhamnus prinoides (Gesho) cultivated in Ethiopia

open access: yesBulletin of the Chemical Society of Ethiopia, 2012
The objective of this study was to assess the levels of essential and toxic metals in leaf and stem of Rhamnus prinoides which are used for bitterness of local alcoholic beverages in Ethiopia and as traditional medicine in some African countries.
Bhagwan Singh Chandravanshi   +1 more
doaj  

Mechanochemical Synthesis and Characterization of Nanostructured ErB4 and NdB4 Rare‐Earth Tetraborides

open access: yesAdvanced Engineering Materials, Volume 27, Issue 6, March 2025.
ErB4 and NdB4 nanostructured powders are produced by mechanochemical synthesis. 5 h mechanical alloying and 4 M HCl acid leaching are used in the production. ErB4 and NdB4 powders exhibit maximum magnetization of 0.4726 emu g−1 accompanied with an antiferromagnetic‐to‐paramagnetic phase transition at about TN = 18 K and 0.132 emu g−1 with a maximum at ...
Burçak Boztemur   +5 more
wiley   +1 more source

Revisiting Stability Criteria in Ball‐Milled High‐Entropy Alloys: Do Hume–Rothery and Thermodynamic Rules Equally Apply?

open access: yesAdvanced Engineering Materials, Volume 27, Issue 6, March 2025.
The stability criteria affecting the formation of high‐entropy alloys, particularly focusing in supersaturated solid solutions produced by mechanical alloying, are analyzed. Criteria based on Hume–Rothery rules are distinguished from those derived from thermodynamic relations. The formers are generally applicable to mechanically alloyed samples.
Javier S. Blázquez   +5 more
wiley   +1 more source

Patellofemoral instability: evaluation by magnetic resonance imaging Instabilidade femoropatelar: avaliação por ressonância magnética

open access: yesRevista Brasileira de Ortopedia, 2013
OBJECTIVE: To determine the contribution of magnetic resonance imaging (MRI) in evaluating patelofemoral instability. METHODS: 39 patients (45 knees) with patellar instability underwent knee magnetic resonance images between October 2009 and July 2011,
Patrícia Martins e Souza   +4 more
doaj  

A Workflow to Accelerate Microstructure‐Sensitive Fatigue Life Predictions

open access: yesAdvanced Engineering Materials, EarlyView.
This study introduces a workflow to accelerate predictions of microstructure‐sensitive fatigue life. Results from frameworks with varying levels of simplification are benchmarked against published reference results. The analysis reveals a trade‐off between accuracy and model complexity, offering researchers a practical guide for selecting the optimal ...
Luca Loiodice   +2 more
wiley   +1 more source

Evaluation of pre-natal care from the perspective of different models in primary care Evaluación de atención prenatal bajo la perspectiva de los diferentes modelos en la atención primaria Avaliação da atenção pré-natal na perspectiva dos diferentes modelos na atenção primária

open access: yesRevista Latino-Americana de Enfermagem, 2013
OBJECTIVES: to evaluate the quality of the pre-natal care delivered in primary care, comparing the traditional model and the Family Health Strategy. METHOD: a service evaluation study, grounded in the public health policies.
Renata Leite Alves de Oliveira   +3 more
doaj  

Thermodynamic Pathways of Nonequilibrium Solidification in Wire‐Arc Additive Manufacturing Fe‐Based Multicomponent Alloy Structures

open access: yesAdvanced Engineering Materials, EarlyView.
Geometry‐driven thermal behavior in wire‐arc additive manufacturing (WAAM) influences microstructural evolution during nonequilibrium solidification of a chemically complex Fe–Cr–Nb–W–Mo–C nanocomposite system. By comparing different deposits configurations, distinct entropy–cooling rate correlations, segregation, and carbide evolution are revealed ...
Blanca Palacios   +5 more
wiley   +1 more source

Ultrafast Synthesis of a Non‐Noble FeCoNiCrZn Multi‐Element Alloy Electrocatalyst for Alkaline Oxygen Evolution Reaction

open access: yesCarbon Energy
The large‐scale implementation of electrocatalytic water splitting for green hydrogen production is hindered by the sluggish kinetics of the oxygen evolution reaction (OER), necessitating efficient and durable catalysts.
Yu Liang   +12 more
doaj   +1 more source

Thermomechanical Fatigue and Creep–Fatigue Interaction of Inconel 718 Additively Manufactured by Laser Beam Powder Bed Fusion

open access: yesAdvanced Engineering Materials, EarlyView.
Thermomechanical fatigue tests of laser beam powder bed fusion (PBF‐LB) Inconel 718 show that the additively manufactured material reaches almost the lifetimes of conventionally‐rolled material under no‐dwell conditions. Introducing dwell times at the maximum temperature markedly reduces the lifetimes due to pronounced grain boundary sliding associated
Stefan Guth   +6 more
wiley   +1 more source

Prevalence study of dermatoses referred to the phototherapy unit at the Dermatology Service of the Clinics Hospital of Porto Alegre, RS, Brazil Estudo de prevalência das dermatoses encaminhadas ao setor de fototerapia do ambulatório de dermatologia do Hospital de Clínicas de Porto Alegre, RS, Brasil

open access: yesAnais Brasileiros de Dermatologia, 2013
BACKGROUND: Phototherapy consists of exposure to ultraviolet radiation for therapeutic reasons. Radiation is already used in dermatological practice, and many studies have already proved the beneficial effect of UV light treatment for chronic ...
Carolina Casara   +2 more
doaj  

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