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Showing 1 to 20 of 117 for “"air water interface"”.
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Crossing the Air-Water Interface: Inspiration from Nature
… aims to contribute toward the understanding of water-entry and -exit behaviors in nature. Since water is nearly a thousand times denser than air, transitioning between the two mediums is often associated with significant changes in force. Three topics with implications in water-entry are …
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Locomotion of Skittering Frogs at the Air-water Interface
Many animals interact with the air-water interface during locomotion. Such location either involves moving through the water's surface or moving atop the water surface. This dissertation aims to investigate both of these forms of locomotion in frogs. First we quantified the kinematics of …
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The study of gas absorption at a wavy air-water interface
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Surface Characterization of Poly (epsilon-caprolactone) at the Air/Water Interface
… (PCL) have been studied at the air/water interface (A/W). PCL is a hydrophobic and crystalline polyester with a glass transition temperature around -60 degrees centigrade, a melting point around 55 degrees centigrade, excellent biocompatibility, and low toxicity. In the past …
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Model membrane interactions with ions and peptides at the air/water interface
… occurring in nature. The lipid monolayers at the air/water interface are suitable model systems to mimic biological membranes since many parameters can be easily controlled. In the present work the lipid monolayers were used as a model membrane and their interactions with two different peptides …
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Static and dynamic properties of soluble surfactants at the air/water interface
… tail. The headgroup is polar or ionic and likes water, the tail is typically an aliphatic chain that cannot be accommodated in a polar environment. The prevailing molecular asymmetry leads to a spontaneous adsorption of amphiphiles at the air/water or oil/water interfaces. As a result, the …
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Relaxation mechanism in methyl stearate monolayer films at the air/water interface
… material to make up for lost molecules at the air/water interface due to the growth of a bulk (crystalline) phase under a constant area condition. The results from temperature dependence studies as well as from the area-relaxation experiments strongly support the proposed relaxation mechanism. …
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Photochemical Reaction Products of Polycyclic Aromatic Hydrocarbons Adsorbed at an Air-Water Interface
… Most studies address PAH degradation in the bulk-water phase, neglecting the fact that the most significant contribution to their environmental degradation takes place in aerosols, especially for volatile PAH (2-4 aromatic rings). PAH can accumulate on the air-water interface, which provides a …
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Amphibian communication: Coupling of acoustic systems to the medium at the air-water interface
<p>Sound does not transmit well across the interface of two media. Therefore, most organisms communicate using one medium. Some anurans vocalize at the interface of air and water, though reception of these vocalizations is generally unknown. The túngara frog ( Engystomops pustulosus ) may be the …
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Measuring heat exchange processes at the air-water interface from thermographic image sequence analysis
… for estimating heat transfer at the free air water interface is presented. For the first time spatially resolved heat flux and transfer velocity measurements are available with a high temporal resolution. The statistical properties of the transfer processes are deduced and the parameters …
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Dynamics and Phase Behavior of Mixed Antibody-Excipient Adsorption at an Air/Water Interface
… nature drives mAbs to strongly adsorb to air/water interfaces. Interfacial adsorption presents a central problem to the production and use of antibody-based pharmaceuticals. Air/water interfaces are frequently generated during the manufacture (filtration and chromatography) and production …
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Navier-Stokes simulations of steep breaking water waves with a coupled air-water interface
… of mass, momentum, heat and energy across the air-sea interface. In the context of the near field flow about a surface ship, the breaking bow wave is a key element to the bubbly signature and an appreciable portion of the wave drag of the ship. Yet, despite its direct effect on many aspects of …
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Experimental investigation of small-scale breaking waves : flow visualization across the air-water interface
… dynamics of breaking waves significantly affect air-sea fluxes of heat, momentum, mass and energy across the ocean interface. Breaking waves also contribute considerable loading to offshore and coastal structures, and furthermore, the quasi-steady bow wave on a ship increases drag and ease of …
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Thermodynamic, morphological and structural properties of dissociated fatty acid monolayers at the air-water interface
Untersuchungen an Monoschichten amphiphiler Lipide auf wässriger Lösung sind in der Grenzflächenforschung von grundlegender Bedeutung. Aufgrund der Anwendbarkeit zahlreicher analytischer Methoden sind schwimmende unlösliche Monoschichten als Modellsysteme sehr geeignet, um Ordnung und …
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Phase Behavior of Poly(Caprolactone) Based Polymer Blends As Langmuir Films at the Air/Water Interface
… blends are studied as Langmuir films at the air/water (A/W) interface. In order to understand the phase behavior of PCL-based blends, surface pressure induced crystallization of PCL in single-component Langmuir monolayers was first studied by Brewster angle microscopy (BAM). PCL crystals …
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