Sentences with word «siloxane»

The United States produces or imports between 200 million and one billion pounds of cyclic siloxanes annually, according to U.S. Environmental Protection Agency estimates.

Although the properties sound appealing, studies have pinpointed siloxanes as bio-accumulative and can interfere with human hormone function — which isn't worth the supposed benefits, especially with cleaner alternatives available!

What was surprising, though, was that levels of another compound — called D5 siloxane — were just as high.

Over the past decade, D5 has largely replaced D4 in cosmetics, according to cyclic siloxane studies.

«They [cyclic siloxanes] are much different compared to other environmental chemicals,» McLachlan said.

That mystery was subsequently solved by UCSB chemical engineering professor Scott Shell and his graduate student Jacob Monroe, whose computer simulations revealed the relative arrangement of silanol and siloxane groups on the surface also had an influence on water adhesion.

The stamp itself is made from poly (dimethyl siloxane); the same kind of silicone rubber used in kitchen utensils and medical implants.

The silicon is then reacted with fossil fuel — derived hydrocarbons to create siloxane monomers that are bonded together into polymers to form the final silicone resin.

Nothing was released into the milk or formula after six hours, but after 72 hours in the alcohol solution several siloxanes were detected.

For example, one study tested the release of siloxanes from silicone nipples and bakeware into milk, baby formula, and a solution of alcohol and water.

The researchers noticed that siloxane levels were highest during the morning rush hour, most likely because that's when people first left their homes after applying personal - care products in the morning.

Don't apply water - based siloxane sealers until the concrete has dried for at least 24 hours.

At night, levels of cyclic siloxanes were about 2.7 times higher than in the daytime, which is probably due to changes in the atmosphere at night, Yucuis said.

Silicones — or siloxanes as they are also known — are something of a hybrid between synthetic rubbers and synthetic plastic polymers.

This compound, which we identified as decamethylcyclopentasiloxane (or D5 siloxane), contains silicon, which uniquely differs from the organic compounds we normally detect.

Silicones, more accurately known as poly (organo) siloxanes, is a term for a group of synthetic polymers in which silicone atoms are linked by oxygen atoms.

«However, with cyclic siloxanes, a much smaller portion ends up in sediment and a much larger portion ends up in fish.»

Cyclic siloxanes are world travelers.

The airborne compounds — cyclic siloxanes — are traveling to places as far as the Arctic, and can be toxic to aquatic life.

The accumulation potential and toxicity of cyclic siloxanes are debated by scientists and industry representatives.

There are two different types of chemical groups that comprise glass surfaces, he said: silanol (SiOH) groups that are generally hydrophilic (water - loving), or siloxane (SiOHSi) groups that are typically water - repellant.

Siloxanes have greased our daily life for many years, while slowly seeping out into our environment.

Siloxanes are considered potential endocrine disrupters, and some have been linked to cancers.

Siloxanes are also present at detectable levels in land, air, and water, and given their durability, they tend to persist in the environment for a long time.

Siloxane isn't present in auto emissions, but it is commonly added to shampoos, lotions, and deodorants to give them a smooth, silky feeling.

Parabens, aluminum, sodium lauryl sulphate, and siloxane are only a few chemicals that we've been warned by numerous organizations to look out for in our personal care products.

Silicone polymers, cyclic siloxanes (e.g., octamethylcyclotetrasiloxane and decamethylcyclopentasiloxane) and other alternatives to oils warrant some concern.

You can start off by avoiding the dirty dozen: BHA and BHT, Coal tar dyes, DEA - related ingredient, Dibutyl phthalate, Formaldehyde - releasing preservatives, Parabens, fragrance, PEG compounds, Petrolatum, Siloxanes, Sodium laureth sulfate, and Triclosan.

The siloxane industry has put together a web page on siloxanes to help the public understand the uses of and science of these chemicals.

After treatment to remove moisture, hydrogen sulfide, and «siloxanes» — residue from the decomposition of soap, shampoo, and other personal - care products — the gas is burned in four massive reciprocating engines.