They include physical attractiveness, proximity, similarity, and reciprocity: 1  Physical attractiveness: Research shows that romantic attraction is primarily determined by physical attractiveness. 2  Peopleâs perception of their own physical attractiveness also plays a role in romantic love. 3  Proximity: People are more likely to become friends with 4  ... S
Filox water filters are a filter medium specifically created for lowering the levels of manganese, iron and hydrogen sulfide from well water. Filox filters are superior performers to other filter media due to the productâs notably high manganese dioxide percentage.
vena cava filter (vena caval filter) a filter used in the inferior vena cava to prevent pulmonary embolism. Wood's filter a nickel-oxide filter that holds back all but a few violet rays and passes ultraviolet rays of about 365 nm; see also Wood's light.