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Polysulfide polymers are also prepared by the addition of polysulfanes to alkenes. An idealized equation is: 2 RCH=CH 2 + H 2 S n → (RCH 2 CH 2) 2 S n. In reality, homogeneous samples of H 2 S n are difficult to prepare. [2] Polysulfide polymers are insoluble in water, oils, and many other organic solvents.
Patients who have taken pentosan polysulfate orally report a variety of side effects, primarily gastrointestinal complaints such as diarrhea, heartburn, and stomach pain. [4] Hair loss, headache, rash, and insomnia have also been reported. [4] Due to Elmiron's anticoagulant effects, some patients report bruising more easily.
However, this does not apply for a normal use on common trees with green leaves. Diluted solutions of lime sulfur (between 1:16 and 1:32) are also used as a dip for pets to help control ringworm (a fungus), mange and other dermatoses and parasites. Undiluted lime sulfur is corrosive to skin and eyes and can cause serious injury like blindness.
The glycosaminoglycan side chains are polyanionic, which causes adjacent side chains to push each other away and create a "bottle brush", where hyaluronic acid is the stem and the side chains are the bristles. When pressure is exerted on the joint, fluids move between the chondrocytes and synovial fluid, exchanging nutrients. [4]
Due to its effects similar to nitric oxide (without its potential to form peroxides by interacting with superoxide), hydrogen sulfide is now recognized as potentially protecting against cardiovascular disease. [1] The cardioprotective role effect of garlic is caused by catabolism of the polysulfide group in allicin to H
Typically they are prepared by the combination of 2-chloroethanol, formaldehyde, and sodium polysulfide (Na 2 S x). The chloroethanol is produced in situ from ethylene oxide and hydrogen chloride. The rank x of the polysulfide is an important variable. [vague] Crosslinking agents are used, such as 1,2,3-trichloropropane.
Technically used polysulfones contain an aryl-SO 2-aryl subunit. Due to the high cost of raw materials and processing, polysulfones are used in specialty applications and often are a superior replacement for polycarbonates. Three polysulfones are used industrially: polysulfone (PSU), polyethersulfone (PES/PESU) and polyphenylene sulfone (PPSU).
Methylene blue is used in endoscopic polypectomy as an adjunct to saline or epinephrine, and is used for injection into the submucosa around the polyp to be removed. This allows the submucosal tissue plane to be identified after the polyp is removed, which is useful in determining if more tissue needs to be removed, or if there has been a high ...