ABSTRACT
We present evidence that rice tungro spherical virus (RTSV) has a genome of polyadenylated single-stranded RNA of about 10 kb whereas rice tungro bacilliform virus (RTBV) contains double-stranded circular DNA. RTBV DNA has been mapped and shown to have two discontinuities, one in each strand, at specific sites; it thus resembles that of the caulimoviruses. Gel electrophoresis of RTSV preparations revealed two protein bands (Mr 35K and 26K). RTBV yielded two major protein bands of 37K and 33K together with several minor species of higher and lower Mr which react with antiviral serum.
Subject(s)
DNA Viruses/isolation & purification , Oryza/microbiology , Plant Diseases , Plant Viruses/isolation & purification , RNA Viruses/isolation & purification , Capsid/isolation & purification , DNA Viruses/genetics , DNA, Viral/isolation & purification , Genes, Viral , Plant Viruses/genetics , RNA Viruses/genetics , RNA, Viral/isolation & purification , Restriction MappingABSTRACT
The fate of 279 Champy miniplates used routinely as permanent implants over a 5-year-period in the management of maxillofacial trauma and orthognathic surgery has been analysed retrospectively. Trauma patients (62) and orthognathic patients (47) were analysed separately; in each group those patients who had plates removed were compared to the patients with retained plates. This study indicates that the morbidity of retaining plates is within acceptable limits and that the routine removal of plates at 3 months may be unnecessary.
