Christine M George ([email protected]) Alexander V Geen ([email protected]) Vesna N Slavkovich ([email protected]) Ashit Singha ([email protected]) Diane Levy ([email protected]) Tariqul Islam ([email protected]) Kazi Ahmed ([email protected]) Joyce Moon-Howard ([email protected]) Alessandro Tarozzi ([email protected]) Xinhua Liu ([email protected]) Pam Factor-Litvak (pr...

The (U/ U) ratio in surface waters is generally higher than secular equilibrium due to nuclide recoil during alpha-decay of U. The size of the deviation from secular equilibrium contains information about the environment in which the water is found. This potential tool for environmental reconstruction has previously been studied in rivers, groundwater, and sediment pore-water. Here we conduct a...

Most studies of family structure and child outcomes conclude that stepchildren fare little better than children in single-parent families, and substantially worse than children in intact families. Is this because adults treat biological children differently from stepchildren, or are stepchildren’s inferior outcomes “explained” by selection into stepfamilies? To address this question we examine ...

We present an ansatz which enables us to construct heterotic/M-theory dual pairs in four dimensions. It is checked that this ansatz reproduces previous results and that the massless spectra of the proposed new dual pairs agree. The new dual pairs consist of M-theory compactifications on Joyce manifolds of G 2 holonomy and Calabi-Yau compactifications of heterotic strings. These results are furt...

We explicitly construct the twistor spaces of some self-dual metrics with torus action given by D. Joyce. Starting from a fiber space whose fibers are compact singular toric surfaces, we apply a number of birational transformations to obtain the desired twistor spaces. Especially an important role is played by flops, a useful operation in algebraic geometry.

The yield ofcell protein was one-third less for streptomycin-dependent Escherichia coli B than for the wild-type parent strain when both were grown aerobically on a medium with limiting glucose, but anaerobically the yield of protein was similar for both strains. The transient pigment absorbing at 503nm that is known to be present in E. coli and other organisms was not detectable in streptomyci...

Jason B. Cook,1,2 David F. Werner,1,6 Antoniette M. Maldonado-Devincci,1 Maggie N. Leonard,1 Kristen R. Fisher,1 Todd K. O’Buckley,1 Patrizia Porcu,1,7 Thomas J. McCown,3,5 Joyce Besheer,1,2,3 Clyde W. Hodge,1,2,3,4 and A. Leslie Morrow1,2,3,4 1Bowles Center for Alcohol Studies, 2Curriculum in Neurobiology, 3Departments of Psychiatry and 4Pharmacology, and 5Gene Therapy Center, University of No...

lace expansion and suggesting that it might converge in five dimensions, and to Takashi Hara for the pleasure of four years of collaboration and for permission to include unpublished joint work. We gratefully acknowledge financial support from the Natural Sciences and Engineering Reearch Council of Canada. Finally we offer our thanks and deep appreciation to Joyce Kruskal and Joanne Nakonechny ...

For helpful comments and suggestions, we wish to thank Alan Garber, Dana Goldman, Geoffrey Joyce, Tomas Philipson, participants in the 2005 NBER Summer Institute Health Economics Workshop, and participants in the Fall 2006 NBER Health Care Program Meetings. We are grateful to the National Institute on Aging for funding. The views expressed herein are those of the author(s) and do not necessaril...