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2. Memory foam - Wikipedia

   en.wikipedia.org/wiki/Memory_foam

   A memory foam mattress is usually denser than other foam mattresses, making it both more supportive and heavier. Memory foam mattresses are often sold for higher prices than traditional mattresses. Memory foam used in mattresses is commonly manufactured in densities ranging from less than 24kg/m 3 (1.5 lb/ft 3 ) to 128kg/m 3 (8 lb/ft 3 ) density.

3. Protein isoform - Wikipedia

   en.wikipedia.org/wiki/Protein_isoform

   Protein isoform. Protein A, B and C are isoforms encoded from the same gene through alternative splicing. A protein isoform, or " protein variant ", [1] is a member of a set of highly similar proteins that originate from a single gene or gene family and are the result of genetic differences. [2] While many perform the same or similar biological ...

4. Quantum foam - Wikipedia

   en.wikipedia.org/wiki/Quantum_foam

   Quantum foam or spacetime foam is a theoretical quantum fluctuation of spacetime on very small scales due to quantum mechanics. The theory predicts that at these small scales, particles of matter and antimatter are constantly created and destroyed. These subatomic objects are called virtual particles. [ 1] The idea was devised by John Wheeler ...

5. Biofoam - Wikipedia

   en.wikipedia.org/wiki/Biofoam

   Biofoam. Biofoams are biological or biologically derived foams, making up lightweight and porous cellular solids. A relatively new term, its use in academia began in the 1980s in relation to the scum that formed on activated sludge plants. [ 1][ 2] Biofoams is a broad umbrella term that covers a large variety of topics including naturally ...

6. Indentation force-deflection - Wikipedia

   en.wikipedia.org/wiki/Indentation_force-deflection

   Indentation force-deflection is a process used in the flexible foam manufacturing industry to assess the "softness" of a sample of foam such as memory foam.To conduct an IFD test, a circular flat indenter with a surface area of 323 square centimeters (50 sq. inches - 8" in diameter) is pressed against a foam sample usually 100 mm thick and with an area of 500 mm by 500 mm (ASTM standard D3574).

7. Polymeric foam - Wikipedia

   en.wikipedia.org/wiki/Polymeric_foam

   A polymeric foam is a special foam, in liquid or solidified form, formed from polymers. [ 1] Examples include: Ethylene-vinyl acetate (EVA) foam, the copolymers of ethylene and vinyl acetate; also referred to as polyethylene-vinyl acetate (PEVA) Low-density polyethylene (LDPE) foam, first grade of polyethylene (PE) Nitrile rubber (NBR) foam ...