University of Lorraine

About: University of Lorraine is a education organization based out in Nancy, France. It is known for research contribution in the topics: Population & Context (language use). The organization has 11942 authors who have published 25010 publications receiving 425227 citations. The organization is also known as: Lorraine University.

Fast mineralization of land-born C in inland waters: first experimental evidences of aquatic priming effect

Abstract: In the context of global change, eroded soil carbon fate and its impact on aquatic ecosystems CO2 emissions are subject to intense debates. In particular, soil carbon mineralization could be enhanced by its interaction with autochthonous carbon, a process called priming effect, but experimental evidences of this process are scarce. We measured in a microcosm experiment simulating oligo-mesotrophic and eutrophic aquatic conditions how quickly soil organic matter (SOM) sampled in diverse ecosystems was mineralized as compared to mineralization within soil horizons. For both nutrient loads, 13C-glucose was added to half of the microcosms to simulate exudation of labile organic matter (LOM) by phytoplankton. Effects of LOM on soil mineralization were estimated using the difference in δ13C between the SOM and the glucose. After 45 days of incubation, the mean SOM mineralization was 63% greater in the aquatic context, the most important CO2 fluxes arising during the first days of incubation. Nutrients had no significant effect on SOM mineralization and glucose addition increased by 12% the mean SOM mineralization, evidencing the occurrence of a priming effect.

Longitudinal myocardial strain alteration is associated with left ventricular remodeling in asymptomatic patients with type 2 diabetes mellitus.

Abstract: Background In normal subjects, left ventricular (LV) dimensions have been shown to decrease over time, while wall thickness is increasing. The aim of this study was to investigate LV remodeling in a cohort of patients with type 2 diabetes mellitus during a 3-year follow-up period and its potential association with decreased longitudinal systolic strain (e L ). Methods One hundred seventy-two patients with type 2 diabetes without overt heart disease were prospectively enrolled and underwent echocardiography with speckle-tracking imaging to assess global LV e L at baseline and at 3 years. The associations between alteration in e L (defined as |e L | Results Among the 172 enrolled patients, 154 completed 3-year follow-up. At baseline, patients with e L alteration had higher LV end-systolic volumes (28 ± 11 vs 23 ± 9 mL, P P = .008) compared with those with normal e L . At 3-year follow-up, RWTs remained stable in both groups. LV volumes significantly decreased in patients with normal e L but not in patients with e L alteration. Multivariate analysis showed that e L alteration was independently associated with LV end-systolic volume (β = 5.0, P = .006) and RWT (β = 0.03, P = .03) at baseline and with changes in both LV end-diastolic volume (β = 19.1, P = .001) and LV end-systolic volume (β = 2.6, P = .047) over 3 years. Conclusions In patients with type 2 diabetes, e L alteration was associated with higher RWT and LV volumes and with the absence of decreases in LV volumes over time, which might be an early sign of adverse LV remodeling.