INTRODUCTION To promote rational and sustainable use of soil resources and to maintain the urban soil quality, it is essential to assess urban ecosystem health. In this study, the microbiological properties of urban soils in Beijing and their spatial distribution patterns across the city were evaluated based on measurements of microbial biomass carbon and urease and invertase activities of the ...

Dopaminergic induced changes in Mauthner-cell excitability disrupts prepulse inhibition 1 in the startle circuit of goldfish. 2 3 Violeta Medan and Thomas Preuss 4 5 Department of Psychology, Hunter College, City University of New York 6 695 Park Avenue, New York, NY 10065 7 8 Running head: dopaminergic disruption of prepulse inhibition 9 10 Corresponding author: Thomas Preuss, [email protected]...

Within the Boundary Waters Canoe Area Wilderness in northeastern Minnesota, soils were collected from 116 sites in areas of primarily virgin forest with fire-origin stand years (year of last recognizable stand-killing wildfire) that range from the 1759 to 1976. Median concentrations for total mercury in soils for this span of 217 years range from 0.28 +/- 0.088 ppm (1759) to 0.09 +/- 0.047 ppm ...

OBJECTIVES The aim of this study was to investigate the associations between surrounding greenness levels and asthma among children, and to explore a possible change of this association by the distance of the residence to a city park. DESIGN A nested case-control study. SETTING Children aged 4-6 years residing at their current address since birth in Kaunas, Lithuania, whose mothers were rec...

We used data available from the literature and measurements from Baltimore, Maryland, to (i) assess inter-city variability of soil organic carbon (SOC) pools (1-m depth) of six cities (Atlanta, Baltimore, Boston, Chicago, Oakland, and Syracuse); (ii) calculate the net effect of urban land-use conversion on SOC pools for the same cities; (iii) use the National Land Cover Database to extrapolate ...

Urbanization is widely presumed to degrade ecosystem services, but empirical evidence is now challenging these assumptions. We report the first city-wide organic carbon (OC) budget for vegetation and soils, including under impervious surfaces. Urban soil OC storage was significantly greater than in regional agricultural land at equivalent soil depths, however there was no significant difference...

Thixotropy implies non-equilibrium initial conditions after remolding. At the macroscale, thixotropy manifests as the regain in mechanical properties. At the microscale, thixotropy involves phenomena such as contact creep and interparticle force redistribution, homogenization of pore pressure (in saturated and partially saturated soils), altered ionic distribution and mobility, and the effects ...

1Department of Mathematics and Computer Science, Adelphi University, 1 South Avenue, Garden City, New York, NY 11530, U.S.A. 2Department of Computer Science, Polytechnic University, 6 Metrotech Center, Brooklyn, New York, NY 11201, U.S.A. 3Department of Computer Science, 3141 Chestnut Street, Drexel University, Philadelphia, PA 19104, U.S.A. 4AT&T Labs—Research, Room C213, 180 Park Avenue, Flor...

In this article, we introduce a recreational amenity—a greenbelt park—into a simple urban economic model. For multiple possible park placements, we solve for the associated equilibrium urban structure, including the equilibrium rent gradient, city boundary, total number of park visits, the overall utility level, and total vehicle miles traveled. We examine how these change with alternative park...