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236 results for “Surfactants”
Drop deformation in a planar elongational flow: impact of surfactant dynamics
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Data from: Spatiotemporal measurement of surfactant distribution on gravity–capillary waves
Materials adsorbed onto the surface of a fluid – for instance, crude oil, biogenic slicks or industrial/medical surfactants – will move in response to surface waves. Owing to the difficulty of non-invasive measurement of the spatial distribution of a molecular monolayer, little is known about the dynamics that couple the surface waves and the evolving density field. Here, we report measurements of the spatiotemporal dynamics of the density field of an insoluble surfactant driven by gravity–capillary waves in a shallow cylindrical container. Standing Faraday waves and travelling waves generated by the meniscus are superimposed to create a non-trivial surfactant density field. We measure both the height field of the surface using moiré imaging, and the density field of the surfactant via the fluorescence of NBD-tagged phosphatidylcholine, a lipid. Through phase averaging stroboscopically acquired images of the density field, we determine that the surfactant accumulates on the leading edge of the travelling meniscus waves and in the troughs of the standing Faraday waves. We fit the spatiotemporal variations in the two fields using an ansatz consisting of a superposition of Bessel functions, and report measurements of the wavenumbers and energy damping factors associated with the meniscus and Faraday waves, as well as the spatial and temporal phase shifts between them. While these measurements are largely consistent for both types of waves and both fields, it is notable that the damping factors for height and surfactant in the meniscus waves do not agree. This raises the possibility that there is a contribution from longitudinal waves in addition to the gravity–capillary waves.
Interface Adsorption versus Bulk Micellization of Surfactants: Insights from Molecular Simulations
<p>Essential files for Gromacs used in the study "Interface Adsorption versus Bulk Micellization of Surfactants: Insights from Molecular Simulations," JCTC to simulate C12EO6 surfactants in bulk water (as micelles) and at a decane/water interface (monolayer).</p>
Serum Surfactant Protein-D as Predictor of Disease Severity in Hospitalized COPD Patients
ClinicalTrials.gov study NCT07154953. IPD Sharing: NO. Countries: 0. Publications: 2.
Medium vs Low Oxygen Threshold for the Surfactant Administration
ClinicalTrials.gov study NCT04199364. IPD Sharing: Not stated. Countries: 0. Publications: 19.
Does The Surfactant Administration by Aerosolization Effective?
ClinicalTrials.gov study NCT02825953. IPD Sharing: Not stated. Countries: 0. Publications: 5.
Budesonia + Intratracheal Surfactant in Incidence of Bronchopulmonary Dysplasia
ClinicalTrials.gov study NCT05534685. IPD Sharing: Not stated. Countries: 0. Publications: 2.
A Study in Preterm Neonates With Respiratory Distress Syndrome (RDS) Comparing CUROSURF® Administration Through Less Invasive Surfactant Administration (LISA) and Conventional Administration
ClinicalTrials.gov study NCT02772081. IPD Sharing: NO. Countries: 1. Publications: 0.
Comparing Surfactant Administration Through Supraglottic Airway and Thin Catheter for Preterm Infants
ClinicalTrials.gov study NCT07030270. IPD Sharing: NO. Countries: 0. Publications: 7.
Effects of Surfactants on the Innate Immune System
ClinicalTrials.gov study NCT01951352. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Human Surfactant Treatment of Respiratory Distress Syndrome Bicenter Trial
ClinicalTrials.gov study NCT00000570. IPD Sharing: Not stated. Countries: 0. Publications: 1.
Less Invasive Surfactant Administration in Late Preterm or Early Term Born Infants
ClinicalTrials.gov study NCT06421506. IPD Sharing: NO. Countries: 0. Publications: 5.
Exogenous Surfactant Through Nebulizer Mask on Clinical Outcomes in Covid-19 Patients
ClinicalTrials.gov study NCT04847375. IPD Sharing: UNDECIDED. Countries: 0. Publications: 7.
Earliest Lung Ultrasound Time for Predicting the Need of Surfactant
ClinicalTrials.gov study NCT04544514. IPD Sharing: UNDECIDED. Countries: 0. Publications: 1.
Early CPAP And Large Volume Minimally Invasive Surfactant (ECALMIST) in Preterm Infants With RDS
ClinicalTrials.gov study NCT01553292. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Pilot Trial of Surfactant Therapy For Preterm Neonates 5-21 Days Old With Respiratory Decompensation
ClinicalTrials.gov study NCT00165074. IPD Sharing: Not stated. Countries: 0. Publications: 1.
Duration of Surfactant Administration and Impact on Stabilisation of Vital Parameters in Very Preterm Neonates: 1 Minutes Versus 5 Minutes
ClinicalTrials.gov study NCT07261787. IPD Sharing: NO. Countries: 1. Publications: 0.
Effect of Surfactants on the Skin Microbiome
ClinicalTrials.gov study NCT01951391. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Pilot Trial of Surfactant Booster Prophylaxis For Ventilated Preterm Neonates
ClinicalTrials.gov study NCT00208039. IPD Sharing: Not stated. Countries: 0. Publications: 1.
Intratracheal Budesonide With Surfactant to Prevent Bronchopulmmonary Dysplasia.
ClinicalTrials.gov study NCT04862377. IPD Sharing: NO. Countries: 0. Publications: 10.
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