Surrey spreads its wings

Chromosome Biology: Wapl Spreads Its Wings

Chromosome segregation requires the removal of cohesion and catenation between sister chromosomes, two physical linkages established during DNA replication. Two new studies reveal that, among other functions, the wings apart-like protein (Wapl) coordinates cohesin removal with decatenation of sister chromosomes during mitosis in mammalian cells.

When a butterfly flaps its wings…

On 20 May, most UK newspapers carried large colour photographs of the monarch butterfly. Some were even bigger than the accompanying reports, with headlines typified by the Daily Mail’s “GM pollen that can mean a cloud of death for butterflies.” The implication was that genetically modified plants in general threaten butterflies in general — even the environment in general. The articles stemmed...

Surrey County Council

Symplectic spreads and symplectically paired spreads

If π is a finite symplectic translation plane, it is shown that any affine homology group is cyclic and has order dividing the order of the kernel homology group. This criterion provides a means to ensure that a given spread is not symplectic. Furthermore, a variety of symplectically paired André spreads are constructed.

Productivity Spreads, Market Power Spreads and Trade

Much of recent Trade theory focuses on heterogeneity of firms and the differential impact trade policy might have on firms with different levels of productivity. A common problem is that most firm level dataset do not contain information on output prices of firms which makes it difficult to distinguish between productivity differences and differences in market power between firms. This paper de...