Phosphorus (P) availability limits productivity in many ecosystems worldwide. As a result, improved understanding of P cycling through soil and plants is much desirable. The use of the oxygen isotopes associated to phosphate can be used to study the cycle of P in terrestrial systems. However, changes with time in the oxygen isotopes associated to available P have not yet been evaluated under fi...

1 Department of Neurology, Centre de référence ‘Démences Rares’, Hôpital de la Pitié Salpêtrière, AP-HP, Paris, France 2 INSERM UMRS 975 – CRICM. Hôpital de la Pitié Salpêtrière, Paris, France 3 Service de Médecine Nucléaire, Hôpital de la Pitié-Salpêtrière, AP-HP, Paris, France 4 Université Pierre et Marie Curie-Paris 6, INSERM, UMR-S 678, Paris, France 5 Service de Neuroradiologie Diagnostiqu...

Pot experiment was conducted in a net house to evaluate the effects of poultry manure on a newly found Cd accumulator Bidens tripartite L. phytoextraction potential to soil Cd pollution. The average Cd concentrations in root, stem, leaf, inflorescence and shoots of poultry manured B. tripartite were significantly decreased (p<0.05) by 35.5%, 34.4%, 31.0%, 46.5% and 22.6%, respectively, as compa...

Background and aims: Phosphorus (P) is an essential element for crop growth. However, while links of P turnover in soils to carbon (C) nitrogen (N) availability have been described, it remains be clarified how combinations fertilizer C N additions affect stocks cycling distinct fractions at different soil depths. The objectives our study were (1) assess total are affected by organic amendments ...

Timber harvesting, with and without prescribed slash ®re, and wild ®re are common disturbances in pine forests of western North America. These disturbances can alter soil nitrogen (N) pools and N supply to colonizing vegetation, but their in ̄uence remains poorly understood for many forests. We investigated the effects of clear cut harvesting and ®re on KCl extractable N pools, net N mineralizat...

Phosphorus losses in runoff from application of manures and biosolids to agricultural land are implicated in the degradation of water quality in the Chesapeake and Delaware Inland Bays. We conducted an incubation study to determine the relative P solubility and bioavailability, referred to as P source coefficients (PSCs), for organic P sources, which are typically land-applied in the Mid-Atlant...

Using a probe and procedure developed for the Abbott TOx analyzer, we investigated the influence of albumin on fluorescence polarization of amniotic fluid. Polarization readings increased when albumin was added to either “mature” or “immature”amnioticfluids. Albumin added to a fraction rich in lamellar bodies (10 000 x g pellet) greatly increased polarization readings, but albumin added to the ...