Results 11 to 20 of about 40,117 (257)

Microfluidic Droplet Generation Enabled by a Pressure Barrier Mechanism

open access: yesEngineering Reports
Microfluidic droplet generation enables the rapid and efficient production of large quantities of droplets to be used in various fields such as medical science and biology.
Mostafa Shojaeian, Ali Koşar
doaj   +2 more sources

Is Phenylnitrene a Missing Link in the Formation of Polycyclic Aromatic Nitrogen Heterocycles? [PDF]

open access: yesAngew Chem Int Ed Engl
A new formation pathway for polycyclic aromatic nitrogen heterocycles (PANHs) has been found. The reaction of phenylnitrene and the propargyl radical leads to quinoline, proving that nitrenes are suitable precursors for nitrogen incorporation mechanisms.
Arns R   +6 more
europepmc   +2 more sources

Manipulation and control of droplets on surfaces in a homogeneous electric field

open access: yesNature Communications, 2022
Control of droplet coalescence is a major challenge of droplet microfluidics. Here, the authors show that homogenous external electric field can induce dipoles inside droplets, which can be used to withdraw samples from an array of droplets.
Johannes Hartmann   +2 more
doaj   +1 more source

Manipulation of single sub-femtolitre droplets via partial coalescence in a direct-current electric field

open access: yesFlow, 2021
It is demonstrated how aqueous droplets with volumes down to the sub-femtolitre range can be manipulated, including the withdrawal of minute samples from the droplets.
Mostafa Shojaeian, Steffen Hardt
doaj   +1 more source

Influence of Residual Stresses on the Crack Initiation and Short Crack Propagation in a Martensitic Spring Steel

open access: yesMetals, 2022
The crack initiation and short crack propagation in a martensitic spring steel were investigated by means of in-situ fatigue testing. Shot peened samples as well as untreated samples were exposed to uniaxial alternating stress to analyze the impact of ...
Anna Wildeis   +2 more
doaj   +1 more source

SenGlove—A Modular Wearable Device to Measure Kinematic Parameters of The Human Hand

open access: yesBioengineering, 2023
For technical or medical applications, the knowledge of the exact kinematics of the human hand is key to utilizing its capability of handling and manipulating objects and communicating with other humans or machines.
Jonas Paul David   +2 more
doaj   +1 more source

Influence of Particle Reinforcement and Heat Treatment on the Wear Resistance of Inductively Melted Hardpaint Coatings

open access: yesMetals, 2020
Wear-resistant coatings can reduce the high economic damage caused by wear processes. In this study, various protective layers based on the alloy X400CrVMo17-15-2 were investigated. Commonly, the prealloyed metal powder is used for plasma transferred arc
Patrick Schwarz   +2 more
doaj   +1 more source

Weak Solutions and Their Kinetic Energy Regarding Time-Periodic Navier–Stokes Equations in Three Dimensional Whole-Space

open access: yesMathematics, 2021
The existence of weak time-periodic solutions to Navier–Stokes equations in three dimensional whole-space with time-periodic forcing terms are established. The solutions are constructed in such a way that the structural properties of their kinetic energy
Mads Kyed
doaj   +1 more source

Ermüdungsfestigkeit von Schraubendruckfedern ‐ Vergleich der Berechnung nach DIN EN 13906‐1 und der Richtlinie des Forschungskuratoriums Maschinenbau (FKM) „Rechnerischer Festigkeitsnachweis für Federn und Federelemente“

open access: yes, 2021
Der Lebensdauernachweis von zyklisch beanspruchten Schraubendruckfedern erfolgt zurzeit mithilfe von Goodman‐Diagrammen der DIN EN 13906‐1.
T. Niwinski   +5 more
semanticscholar   +1 more source

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