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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.
The surface increases during inspiration, which consequently opens space for new surfactant molecules to be recruited to the interface. Meanwhile, during expiration the surface area decreases at a rate which is always in excess of the rate at which the surfactant molecules are driven from the interface into the water film.
The lamellar bodies then unfold into a complex lining of the air space. This layer reduces the surface tension of the fluid that lines the alveolar air space. Surface tension is responsible for approximately 2/3 of the inward elastic recoil forces. In the same way that a bubble will contract to give the smallest surface area for a given volume ...
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). This biological fluid reduces ...
Furthermore, surfactants also contains some innate immune components to defend against pulmonary infections. Surfactant is classified into two types of proteins, hydrophilic proteins that are responsible for innate immune system, and hydrophobic proteins that carry out physical functions of pulmonary surfactant. [3]
Pulmonary surfactant is used as a medication to treat and prevent respiratory distress syndrome in newborn babies. [ 1 ] Prevention is generally done in babies born at a gestational age of less than 32 weeks. [ 1 ]
In polymer chemistry, emulsion polymerization is a type of radical polymerization that usually starts with an emulsion incorporating water, monomers, and surfactants.The most common type of emulsion polymerization is an oil-in-water emulsion, in which droplets of monomer (the oil) are emulsified (with surfactants) in a continuous phase of water.
Addition of a surfactant allows micelles to form around the ferroparticles. A surfactant has a polar head and non-polar tail (or vice versa), one of which adsorbs to a ferroparticle, while the non-polar tail (or polar head) sticks out into the carrier medium, forming an inverse or regular micelle, respectively, around the particle. This ...