Sentences with phrase «by surfactants»

Micelles are tiny ring - like structures formed by surfactants.

Our cell membranes are made with thin layers of fat molecules, which can be easily disrupted by surfactants like propylene glycol.

The liquid film separating the bubble from bulk air can have a long lifetime (if it is viscous) even if it is not protected by a surfactant.

Incidentally, I have been unable to find out if the models which are producing the GW scenarios include some allowance for the fact that the ocean / atmosphere interface (the boundary layer, so called, an irritating nomenclature as the words already have a technical meaning) was changed drastically from about 1850 onwards by surfactant and oil spill pollution as the petrochemical industry and petrol engine technologies began to hit their stride.

Not exact matches

The air sacs of the lungs, called alveoli, will be developed by the end of this week and will begin to secrete a substance called surfactant that keeps the lung tissue from sticking together.

You won't get a clear cut answer by looking at the ingredients label, where you typically find the following confusing message: «Ingredients include surfactants and enzymes.»

MAS can affect the baby in a number of ways, including chemical irritation to the lung tissue, airway obstruction by a meconium plug, infection, and the inactivation of surfactant by the meconium.

Dispersants are mixtures of solvents, surfactants and other additives that break up the surface tension of an oil slick and make oil more soluble in water, according to a paper published by the National Academy of Sciences.

«Normally, the tension of liquids can be lowered by adding surfactants — like putting soap or detergent in water — to the liquid.

For instance, there were surfactants addressable by temperature, electric or magnetic field, light, and chemical agents.

«Multiresponsive nanosurfactant constructs tiny chemical factory: New integrated surfactant made with nanoparticles is manipulated by magnetic field, electric field, and light.»

But Eastoe and other chemists are creating genuine supersoaps by finding ways to get surfactant molecules to lose their foamy properties [pdf] under particular conditions so that the foam can, in effect, be turned off and on at will.

Funded by the U.S. Department of Energy, researchers from the Catalysis Center for Energy Innovation developed a new chemical process to combine fatty acids from soybeans or coconut and sugar - derived rings from corn to make a renewable soap molecule called Oleo - Furan - Surfactant (OFS).

The trick is to get the iron to chemically bond to the soap — or as chemists like to say, the «surfactant» — and in sufficient quantity to enable the ironic solution to be pulled by a magnet.

By generating these jammed nanoparticle surfactants at interfaces, fluid drops of arbitrary shape and size can be stabilized opening applications in fluidics, encapsulation and bicontinuous media for energy applications.

By reaching across the oil - water boundary, the surfactant lowers the tension that keeps the two substances separate.

Importantly, patients with mutations in a single copy of NKX2.1 often have Brain - Lung - Thyroid Syndrome, which is characterized by respiratory distress after birth and accompanied by decreased surfactant protein expression.

The fundamental insights provided by this device could also prove useful for other materials in which dynamic changes occur between membranes, including surfactant monolayers and bilayers, biomolecules, colloidal particles, surfactant - coated nanoparticles and smart materials.

Furthermore, the scientists found that by adjusting variables like the molecular weight of the fluorine rubber, they could control the distribution and population of nanoparticles, while the presence of surfactant and heating accelerated their formation and influenced their size.

With one end attracted to water and the other end repelled by it, the surfactant molecules travel to the surface of the drop once it is immersed in oil.

A still frame from a video captured by researchers, this greenlit image shows the distribution of particles in water and a surfactant at its surface.

Bandi and his colleagues worked from a mathematical model developed by Brown University professor, Shreyas Mandre, which predicts how a liquid like water interacts with a surfactant — a liquid like soap or detergent, which have lower surface tension, introduced at its surface.

Different chemicals used for the field include inhibitors for scaling, fouling, corrosion, asphaltene control, formation damage, differential pressures in multiphase environments which will be met by new synthesis methods including metathesis reactions, bio based feedstocks, new polymer surfactants, living polymers, and nanoparticle.

The surfactant is a molecule defined by its «head» and «tail» chemistry.

Acknowledgments: The study of surfactant self - assembly in confined environment is supported by the U.S. Department of Energy, Office of Basic Energy Sciences, Materials Sciences and Engineering Division.

Bicontinuous structured liquids with sub-micrometre domains using nanoparticle surfactants by Caili Huang, Joe Forth, Weiyu Wang, Kunlun Hong, Gregory S. Smith, Brett A. Helms & Thomas P. Russell.

Prevents chromosomes from collapsing into a single chromatin mass by forming a steric and electrostatic charge barrier: the protein has a high net electrical charge and acts as a surfactant, dispersing chromosomes and enabling independent chromosome motility (PubMed: 27362226).

And if you're a beauty product purist, it's important to know that the only way to get oils and balms to emulsify is by adding surfactants, which means it won't be 100 percent free of synthetic chemicals.

TEWL increases in response to any disruption to the skin barrier (wounds, scratches, burns, exposure to solvents or surfactants, extreme dryness) and is affected by humidity, temperature, season, and moisture content of the skin (hydration level).

L - carnitine is involved with the production of pulmonary surfactant, a compound produced by the lung required for proper lung inflation and function.

Zymox protects the skin without irritating or drying it by using only the mildest plant surfactants as a base, and using enzymes with anti-inflammatory properties to calm the skin and vitamin D3 to help hydrate.

Most of these products work much like regular shampoo, in which surface acting agents, or surfactants, lift dirt that is carried away by soapsuds.

Enough oil and surfactant comes down the world's rivers and by other means to coat the entire ocean surface with a smoothing layer every two weeks.

For example, changes in the surfactants produced by plankton trying to keep warm, or some other biological factor that has been totally ignored.

Ethoxylated surfactants and 1,4 - dioxane: Never listed because it's a by - product made from adding carcinogenic ethylene oxide to make other chemicals less harsh.