ployment of genes during odontogenesis across osteichthyans by Dr GJ Fraser, Dr A Graham and Professor MM Smith
We have analysed how teeth form in the trout, an animal with a complex dentition where teeth are not only associated with the jaws but are found at other sites within the mouth. Comparison with detailed knowledge of the mouse remarkably shows that the same genes are deployed in trout at equivalent stages of tooth development. We conclude that the genes needed to build a dentition are conserved from fish to mouse and notably are repetitively used for all generations of teeth, from the mouth margins to rear gill arches. Thus a molecular tool kit for making teeth emerged early in vertebrate evolution.
Contact: Professor Moya Smith, Craniofacial Development, United Dental & Medical Schools, Guys and St. Thomas Hospitals, Floor 27 Guy's Tower, LONDON BRIDGE, SE1 9RT

Proceedings of The Royal Society A: Mathematical, Physical and Engineering Sciences

On an infinite integral arising in the numerical integration of stochastic differential equations by Dr DM Stump and Professor JM Hill
Financial institutions value many of their deals using mathematical equations that describe how the prices of assets change with time. Sometimes these equations can be very difficult to solve and require long computer calculations for an accurate answer. In this study we look at one of the solution methods and work an approximation for what is normally the slowest part of the calculation. This may help improve the speed of these types of solution methods and allow banks to employ more realistic valuation equations.
Contact: Dr David Stump, National Australia Bank, 32/500 Bourke Street, MELBOURNE 3000, Australia

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Contact: Tim Watson
tim.watson@royalsoc.ac.uk
44-207-451-2508
Royal Society
9-Nov-2004

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