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2,4-Dichlorophenoxyacetic acid is an organic compound with the chemical formula Cl 2 C 6 H 3 OCH 2 CO 2 H.It is usually referred to by its ISO common name 2,4-D. [4] It is a systemic herbicide that kills most broadleaf weeds by causing uncontrolled growth, but most grasses such as cereals, lawn turf, and grassland are relatively unaffected.
Onset of effects is rapid. [2] A number of doses may be needed. [2] Side effects may include slow heart rate and low oxygen levels. [1] Its use is also linked with intracranial bleeding. [1] Pulmonary surfactant may be isolated from the lungs of cows or pigs or made artificially. [1] [3] [4]
Surfactant therapy is the medical administration of pulmonary surfactant that is derived from outside of the body. Pulmonary surfactant is a soap-like chemical synthesized by type II alveolar pneumocytes and is of various lipids (80% phospholipids, 5-10% cholesterol, and ∼10% surfactant-associated proteins).
Octenidine dihydrochloride is a cationic surfactant, with a gemini-surfactant structure, derived from 4-aminopyridine. It is active against Gram-positive and Gram-negative bacteria. Since 1987, it has been used primarily in Europe as an antiseptic prior to medical procedures, including on neonates.
Kolliphor EL is a synthetic, nonionic surfactant used to stabilize emulsions of nonpolar materials in water. Kolliphor EL is an excipient or additive in drugs. Therapeutically, modern drugs are rarely given in a pure chemical state, so most active ingredients are combined with excipients or additives such as Kolliphor EL. [2]
Surfactant molecules have either one tail or two; those with two tails are said to be double-chained. [4] Surfactant classification according to the composition of their head: non-ionic, anionic, cationic, amphoteric. Most commonly, surfactants are classified according to polar head group. A non-ionic surfactant has no charged groups in its ...
Surfactin is a cyclic lipopeptide, commonly used as an antibiotic for its capacity as a surfactant. [2] It is an amphiphile capable of withstanding hydrophilic and hydrophobic environments. The Gram-positive bacterial species Bacillus subtilis produces surfactin for its antibiotic effects against competitors. [3]
Cetylpyridinium chloride is known to cause tooth staining in approximately 3 percent of users. [14] The Crest brand has noted that this staining is actually an indication that the product is working as intended, as the stains are a result of bacteria dying on the teeth. [15]