Search results
Results from the WOW.Com Content Network
Hollow fiber membranes (HFMs) are a class of artificial membranes containing a semi-permeable barrier in the form of a hollow fiber. Originally developed in the 1960s for reverse osmosis applications, hollow fiber membranes have since become prevalent in water treatment, desalination, cell culture, medicine, and tissue engineering. [ 1 ]
Likewise, because hollow fiber bioreactors use up significantly less medium and growth factors than traditional cell culture methods such as stirred-tank bioreactors, they offer a significant cost savings. Finally, hollow fiber bioreactors are sold as single-use disposables, resulting in significant time savings for laboratory staff and ...
Nanotubes synthesized hollow carbon molecules and determined their crystal structure for the first time in the soot of arc discharge at NEC, by Japanese researcher Sumio Iijima. [ 13 ] August — Nanotubes discovered in CVD by Al Harrington and Tom Maganas of Maganas Industries, leading to development of a method to synthesize monomolecular ...
The molecules may have hollow sphere- and ellipsoid-like forms, tubes, or other shapes. Fullerenes with a closed mesh topology are informally denoted by their empirical formula C n, often written Cn, where n is the number of carbon atoms. However, for some values of n there may be more than one isomer.
Also acid ionization constant or acidity constant. A quantitative measure of the strength of an acid in solution expressed as an equilibrium constant for a chemical dissociation reaction in the context of acid-base reactions. It is often given as its base-10 cologarithm, p K a. acid–base extraction A chemical reaction in which chemical species are separated from other acids and bases. acid ...
Hollow, a low, wooded area, such as a copse; Hollow (landform), a small vee-shaped, riverine type of valley; Tree hollow, a void in a branch or trunk, which may ...
In crystalline inorganic materials, mesoporous structure noticeably limits the number of lattice units, and this significantly changes the solid-state chemistry. For example, the battery performance of mesoporous electroactive materials is significantly different from that of their bulk structure.
This process typically yields VGCF with sub-micrometre diameters and lengths of a few to 100 μm, which accords with the definition of carbon nanofibers. They utilized organometallic compounds dissolved in a volatile solvent like benzene that would yield a mixture of ultrafine catalyst particles (5–25 nm in diameter) in hydrocarbon gas as the ...