In an earlier study, Ford and McCandlish (1969) isolated TRic agents, by the yolk-sac method, from fifteen of 133 urethral scrapings of men with nongonococcal urethritis. Gordon and Quan (1965) had previously found that TRIC agents would propagate in irradiated McCoy cells and could be readily demonstrated by the resulting inclusions which stained purple with iodine because of their glycogen co...

let r be an associative ring with unity. an element a in r is said to be r-clean if a = e+r, where e is an idempotent and r is a regular (von neumann) element in r. if every element of r is r-clean, then r is called an r-clean ring. in this paper, we prove that the concepts of clean ring and r-clean ring are equivalent for abelian rings. further we prove that if 0 and 1 are the only idempotents...

let r be an associative ring with unity. an element a in r is said to be r-clean if a = e+r, where e is an idempotent and r is a regular (von neumann) element in r. if every element of r is r-clean, then r is called an r-clean ring. in this paper, we prove that the concepts of clean ring and r-clean ring are equivalent for abelian rings. further we prove that if 0 and 1 are the only idempotents...