Results 11 to 20 of about 9,048,704 (302)

Abrupt phase change in graphene-gold spr-based biosensor

open access: yesMaterials Research Express, 2020
The performance of surface plasmon resonance (SPR) sensors can be different depending on which characteristic of the SPR sensor the amplitude or the phase is monitored.
Nasrin Bouzari   +3 more
doaj   +1 more source

Influence of High-Temperature Oxidizing Conditions on AlCoCrCuNi High Entropy Alloys with and without Silicon Addition [PDF]

open access: yesArchives of Metallurgy and Materials, 2022
Initial investigations on oxidation behaviour and phase transformations of equimolar AlCoCrCuNi high entropy alloy with and without 1 at.% silicon addition during 24-hr exposure to air atmosphere at 1273 K was carried out in this work.
R. Gawel   +3 more
doaj   +1 more source

X-ray and Thermal Analysis of Selected Drugs Containing Acetaminophen

open access: yesMolecules, 2020
Studies carried out by X-ray and thermal analysis confirmed that acetaminophen (paracetamol), declared by the manufacturers as an Active Pharmaceutical Ingredient (API), was present in all studied medicinal drugs.
Izabela Jendrzejewska   +4 more
doaj   +1 more source

Mechanochemical synthesis of AlCoCrFeNi powders via high-energy ball milling

open access: yesҚарағанды университетінің хабаршысы. Физика сериясы, 2023
AlCoCrFeNi powders in equimolar ratios were synthesized by mechanochemical synthesis on a high-energy ball milling machine (HEBM). The elemental and phase composition of AlCoCrFeNi powders before and after mechanochemical synthesis were investigated by ...
Е.Е. Камбаров   +3 more
doaj   +1 more source

Modeling the Instability of Development of Complex Hierarchical Systems [PDF]

open access: yesProblemi Ekonomiki, 2021
The article suggests using modern instruments of dynamic analysis, i.e. the theories of phase, cointegration, and bifurcation analysis and the catastrophe theory to improve the methodology to study the dynamic pattern of the development indices of ...
Sergienko Olena A.   +2 more
doaj   +1 more source

Reliability of phase-specific outcome measurements in change-of-direction tests using a motorized resistance device

open access: yesFrontiers in Sports and Active Living, 2023
This study aims to determine test-retest reliability of phase-specific information during initial acceleration, deceleration, and re-acceleration phases of different change-of-direction (CoD) tests using a motorized resistance device (MRD). A total of 21
Frederic Westheim   +4 more
doaj   +1 more source

Variational analysis of the deconfinement phase transition [PDF]

open access: yes, 2002
We study the deconfining phase transition in 3+1 dimensional pure SU(N) Yang-Mills theory using a gauge invariant variational calculation. We generalize the variational ansatz of Phys. Rev. D52, 3719 (1995) to mixed states (density matrices) and minimize
Alex Kovner   +4 more
core   +2 more sources

Experimental study and analysis of the mechanical properties of high-water-content materials modified with fly ash

open access: yes工程科学学报, 2018
High-water-content materials are a new type of inorganic cementitious material. They have been widely used in the mining of underground mined-out areas in recent years.
FENG Bo   +4 more
doaj   +1 more source

Green synthesis of ZnO nanoparticles by pineapple peel extract from various alkali sources

open access: yesJournal of Asian Ceramic Societies, 2022
Zinc oxide nanoparticles (ZnO NPs) are concerned as potential materials due to their wide-ranging applications. The green synthesis of ZnO NPs using of plant extract as capping agent has been attracted much of interest of reserachers.
Arrak Klinbumrung   +5 more
doaj   +1 more source

Mathematical model of the photoplethysmogram for testing methods of biological signals analysis [PDF]

open access: yesИзвестия высших учебных заведений: Прикладная нелинейная динамика, 2023
The purpose of this study was to develop a mathematical model of the photoplethysmogram, which can be used to test methods that introduce the instantaneous phases of the modulating signals.
Vakhlaeva, Anna Mikhailovna   +4 more
doaj   +1 more source

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