#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

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...

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."