We have compared the sequences of the putative polypeptides of the human pathogenic B19 parvovirus with protein sequences in the National Bethesda Research Foundation Library, and have discovered a significant homology between a B19 parvovirus non-structural (NS) protein and the T antigens of polyomaviruses and simian virus 40 (SV40) and the putative E1 proteins of papillomaviruses. The region ...

We investigate Room squares and subsquares. All terminology is as in [6] and [7], and we will assume the reader is familiar with the definitions contained therein. (These include group-divisible designs, transverial designs, and frames.) We will refer to an incomplete Room square of side s missing a subsquare of side t as an (s, t)-incompZefe Room square. It is known that for any odd t, there i...

Using a 2010 review of non-indigenous species (NIS) reported in the Mediterranean Sea as baseline, this study undertakes paramount revision list region up to December 2021, re-evaluating established, casual and failed introduction events over 1366 taxa. In light new data expert judgement, 14 have been removed from “established list” inventory. The total number validated NIS is close 1000—751 es...