#surfactant — Public Fediverse posts

Marangoni Bursting With Surfactants

A few years ago, researchers described how an alcohol-water droplet atop an oil bath could pull itself apart through surface tension forces. Dubbed Marangoni bursting, this phenomena has shown up several times since. Here, researchers explore a twist on the behavior by adding surfactants to see how they affect the bursting phenomenon. (Video and image credit: K. Wu and H. Stone; via GFM)

#flowVisualization #fluidDynamics #instability #MarangoniBursting #physics #science #surfaceTension #surfactant

Marangoni Bursting With Surfactants

A few years ago, researchers described how an alcohol-water droplet atop an oil bath could pull itself apart through surface tension forces. Dubbed Marangoni bursting, this phenomena has shown up several times since. Here, researchers explore a twist on the behavior by adding surfactants to see how they affect the bursting phenomenon. (Video and image credit: K. Wu and H. Stone; via GFM)

#flowVisualization #fluidDynamics #instability #MarangoniBursting #physics #science #surfaceTension #surfactant

When a drop settles gently against a pool of the same liquid, it will coalesce. The process is not always a complete one, though; sometimes a smaller droplet breaks away and remains behind (to eventually do its own settling and coalescence). When this happens, it’s known as partial coalescence.

Here, researchers investigate ways to tune partial coalescence, specifically to produce more than a single droplet. To do so, they add surfactants to the oil layer surrounding their water droplet. The surfactants make the rebounding column of water skinnier, which triggers the Rayleigh-Plateau instability that’s necessary to break the column into more than one droplet. (Image and video credit: T. Dong and P. Angeli)

https://fyfluiddynamics.com/2024/10/tweaking-coalescence/

#2022gofm #coalescence #coalescenceCascade #fluidDynamics #instability #physics #PlateauRayleighInstability #science #surfaceTension #surfactant

Telling my friend about DOC #surfactant in creek. He was worried at first sight but it's not pollution. It is a #natural occurrence. It's an essential part of a healthy & functioning #forest #ecosystem.

Naturally occurring stream foam can be off-white, light tan, or brown. Formed by dissolved organic matter/dissolved #organic carbon (DOC). DOC results from the breakdown of organic debris, tannins & #watershed soils rich in organic materials.

#creek #water #nature #Educational #Wsanec #HighlandsBC #Saanich #YYJ #NatureVideo #NatureNerd #VictoriaBC #VancouverIsland #PacificNorthwest #VanIsle #PNW #Cascadia #NiftyNature #ecological #environment

Telling my friend about DOC #surfactant in creek. He was worried at first sight but it's not pollution. It is a #natural occurrence. It's an essential part of a healthy & functioning #forest #ecosystem.

Naturally occurring stream foam can be off-white, light tan, or brown. Formed by dissolved organic matter/dissolved #organic carbon (DOC). DOC results from the breakdown of organic debris, tannins & #watershed soils rich in organic materials.

#creek #water #nature #Educational #Wsanec #HighlandsBC #Saanich #YYJ #NatureVideo #NatureNerd #VictoriaBC #VancouverIsland #PacificNorthwest #VanIsle #PNW #Cascadia #NiftyNature #ecological #environment

A #therapy for suppressing canonical & noncanonical #SARS-CoV-2 viral #entry & an intrinsic intrapulmonary #inflammatory response, Proc Natl Acad Sci USA: https://www.pnas.org/doi/abs/10.1073/pnas.2408109121?af=R

We have harnessed our patient-specific, induced pluripotent stem cell–derived, multicell #lung #organoid model to investigate critical aspects of #COVID19, including viral tropism & routes of entry, lung-specific immune response, & a role for #surfactant protein B in innate immunity...

A #therapy for suppressing canonical & noncanonical #SARS-CoV-2 viral #entry & an intrinsic intrapulmonary #inflammatory response, Proc Natl Acad Sci USA: https://www.pnas.org/doi/abs/10.1073/pnas.2408109121?af=R

We have harnessed our patient-specific, induced pluripotent stem cell–derived, multicell #lung #organoid model to investigate critical aspects of #COVID19, including viral tropism & routes of entry, lung-specific immune response, & a role for #surfactant protein B in innate immunity...

I use the #surfactant #SDC extensively for #proteomics sample prep. It is compatible with #Trypsin and easily removed. Very occasionally the solution will gel - and I can reverse this fortunately. Today I discovered why this happens:

https://doi.org/10.1021/jp409626s
"The results demonstrate that the gels are formed by intertwined fibrils, which are induced by enormous cycles of NaDC molecules driven by comprehensive noncovalent interactions, especially the hydrogen bonds."

I use the #surfactant #SDC extensively for #proteomics sample prep. It is compatible with #Trypsin and easily removed. Very occasionally the solution will gel - and I can reverse this fortunately. Today I discovered why this happens:

https://doi.org/10.1021/jp409626s
"The results demonstrate that the gels are formed by intertwined fibrils, which are induced by enormous cycles of NaDC molecules driven by comprehensive noncovalent interactions, especially the hydrogen bonds."