Rundle, R. E., Foster, J. F., and Baldwin, R. R., J. Amer. Chem. Soc., 66, 2116 (1944).

Helix’s USP is that it makes a mattress to suit every body type and sleeping style. The Helix Twilight is a firm mattress for side sleepers — which, on paper, sounds like a bit of a dichotomy.

Helix Sleep is offering 25% off sitewide with code MARCH25 during Sleep Awareness Week. All Helix mattresses come with a limited lifetime warranty and a 100-night sleep trial. Experts recommend ...

One mattress is too soft or too firm, the other too hot or too bouncy. After sleeping on the Helix Midnight Luxe for over a year, I finally found a mattress that’s just right. It utilizes a ...

Helix is celebrating Sleep Week by taking 27% off all mattresses with code TOMS27. This is one of the largest discounts we've ever seen from the brand — and we normally don't see this type of ...

After hours: March 21 at 7:45:37 PM EDT Loading Chart for HLX ...

Federal University of São Carlos (UFSCar), 110 km João Leme dos Santos Road, Sorocaba, SP 18052-780, Brazil Technological College of Sorocaba (Fatec), 2015 Carlos Reinaldo Mendes Avenue, Sorocaba, SP ...