We generalise the definition and many properties of partial flocks of non-singular quadrics in PG(3, q) to partial flocks of non-singular quadrics in PG(2r + 1, q).

A new homologous, cell-free system for protein synthesis has been devised for use with ribosomes and elongation factors from Aspergillus nidulans. Ribosome preparations from strains with either the suaAlO1 or suaCl09 mutations have a higher misreading ratio (non-cognate:cognate amino acid incorporation) in the presence of hygromycin than controls. They can be classed as fidelity mutants. These ...

If a GQ S ′ of order (s, s) is contained in a GQ S of order (s, s2) as a subquadrangle, then for each point X of S\S ′ the set of points OX of S ′ collinear with X form an ovoid of S ′. Thas and Payne proved that if S ′ = Q(4, q), q even, and OX is an elliptic quadric for each X ∈ S\S ′, then S ∼= Q(5, q). In this paper we provide a single proof for the q odd and q even cases by establishing a ...

Care of offspring by individuals other than the mother is ubiquitous in callitrichid primates. In spite of its widespread occurrence, however, there is considerable taxonomic variation in the timing and intensity of parental effort by breeding males and nonbreeding juvenile group members. These differences may be attributable to generic and specifies differences in the costs of reproduction for...