One can thus see how a substance (monomer) with as small a molecular weight as 54 grows to become a giant molecular (polymer) of (54 × 4000 ≈)200000 molecular weight. It is essentially the 'giantness' of the size of the polymer molecule that makes its behavior different from that ...
Unlike most cancers, mesothelioma doesn’t usually form as a single tumor. This makes it harder for doctors to diagnose. For example, pleural mesothelioma spreads over the surface of the lungs and chest wall, while peritoneal mesothelioma covers the lining of the abdomen. Key Facts on Malignant...
Step 4: Converting to pulp Filament yarns are chopped and mixed with water to form a fibrous substance called wet pulp. This wet pulp can be sold directly or dried to create and sell as dry pulp.Industries Applications where aramids are used Thanks to their high strength, heat resistance...
A molecule of water has a relative molecular mass of 18 (that's 16 for the oxygen atom, plus two hydrogens, making 18). A mole of water weighs 18g and contains 620 billion trillion molecules. Photo: A mole of any substance contains the same number of elementary particles (atoms, ...
This makes PAAs polyelectrolytes, with the ability to absorb and retain water and swell to many times their original volume. Dry PAAs are found in the market as white and fluffy powders. Carbomer codes (910, 934, 940, 941 and 934P) are an indication of molecular weight and the specific ...
The idea of ‘nature’ is at the very core of science, considered as its flagship and deepest link with human societies. However, while nature preservation has become a major social concern, the idea of nature remains elusive. We examine here the origins
A state of matter is a qualitative state of substances that depends on temperature and pressure. Atomic bonds become more unstable as temperature rises. A substance can go from the first into the second and then into the third state: solids become liquids, and liquids become gases. If a gas...
Fabry disease is a rare inherited condition characterized by the toxic accumulation of a fatty substance called globotriaosylceramide (Gb3) in the body’s cells. This buildup impairs organ function, especially in the kidneys and heart. The disease is also known as Anderson-Fabry disease, after...
Monomer:A molecule that can be bonded to other identical molecules to make a polymer (see below). Remember that the prefix "mono" means "one." Polymer:A substance made primarily or entirely of similar units bonded together. Each of these molecular units is a monomer (see above). The prefi...
When delving into what makes cocaine a powerful stimulant, it’s crucial to understand its chemical composition. Cocaine, known scientifically as benzoylmethylecgonine, is an alkaloid found in the leaves of the South American coca plant. At its core, this substance functions by stimulating the cent...