Lactobacillus acidoÂ´philus a lactobacillus producing the fermented product, acidophilus milk; preparations are used as digestive aids, for the production of B-complex vitamins, and to help prevent infections after antibiotic treatment.
Styrene, also known as ethenylbenzene, vinylbenzene, and phenylethene, is an organic compound with the chemical formula C6H5CH=CH2. This derivative of benzene is a colorless oily liquid that evaporates easily and has a sweet smell, although high concentrations have a less pleasant odor. Styrene is the precursor to polystyrene and several copolymers. Approximately 25 million tonnes (55 billion pounds) of styrene were produced in 2010.
Benzene is the archetypical aromatic compound. It is planar, bond angles=120Âº, all carbon atoms in the ring are sp 2 hybridized, and the pi-orbitals are occupied by 6 electrons. The aromatic heterocycle pyridine is similar to benzene, and is often used as a weak base for scavenging protons.he resulting planar ring meets the first requirement for aromaticity, and the Ï-system is occupied by 6 electrons, 4 from the two double bonds and 2 from the heteroatom, thus satisfying the Hueckel HÃ¼ckel. Rule four illustrative examples of aromatic compounds are shown. above