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Pentafluoropropane. Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). 1,1,1,3,3-Pentafluoropropane ( HFC-245fa) is a hydrofluorocarbon is a colorless gas used primarily for closed-cell spray foam insulation. HFC-245fa is also known as pentafluoropropane and by its chemical name 1,1 ...
Stem cell factor. Stem cell factor (also known as SCF, KIT-ligand, KL, or steel factor) is a cytokine that binds to the c-KIT receptor ( CD117 ). SCF can exist both as a transmembrane protein and a soluble protein. This cytokine plays an important role in hematopoiesis (formation of blood cells), spermatogenesis, and melanogenesis .
A spin foam is a particular type of 2- complex, with labels for vertices, edges and faces. The boundary of a spin foam is a spin network, just as in the theory of manifolds, where the boundary of an n-manifold is an (n-1)-manifold. In loop quantum gravity, the present spin foam theory has been inspired by the work of Ponzano–Regge model.
Gas pycnometer. A gas pycnometer is a laboratory device used for measuring the density —or, more accurately, the volume —of solids, be they regularly shaped, porous or non-porous, monolithic, powdered, granular or in some way comminuted, employing some method of gas displacement and the volume:pressure relationship known as Boyle's Law. A ...
A DP cell is a device that measures the differential pressure between two inputs. [1] Example: To measure the pressure difference between a container (or vessel) and the surrounding atmosphere, you may connect 'Hi' port of the DP-cell to a fitting that enters the vessel, using suitable tubing. The 'Lo' port, you leave open to the atmosphere ...
Structure. Latex foam is a form of latex that is lightweight and expanded. Cellular air bubbles are created inside liquid latex, and they can be shaped into different shapes and sizes. The extension of the foam is defined by the amount of air inside of these cells. [5] Lower density and more extended foams tend to have cells which are more ...
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