Carbon dynamics and export from flooded wetlands: A modeling approach

Described in this article is development and validation of a process based model for carbon cycling in flooded wetlands, called WetQual-C. The model considers various biogeochemical interactions affecting C cycling, greenhouse gas emissions, organic carbon export and retention. WetQual-C couples carbon cycling with other interrelated geochemical cycles in wetlands, i.e. nitrogen and oxygen; and fully reflects the dynamics of the thin oxidized zone at the soil-water interface. Using field collected data from a small wetland receiving runoff from an agricultural watershed on the eastern shore of Chesapeake Bay, we assessed model performance and carried out a thorough sensitivity and uncertainty analysis to evaluate the credibility of the model. Overall, model performed well in capturing TOC export fluctuations and dynamics from the study wetland. Model results revealed that over a period of 2 years, the wetland removed or retained equivalent to 47 ± 12% of the OC carbon intake, mostly via OC decomposition and DOC diffusion to sediment. The study wetland appeared as a carbon sink rather than source and proved its purpose as a relatively effective and low cost mean for improving water quality

Effect of Intracoronary Streptokinase Administered Immediately After Primary Percutaneous Coronary Intervention on Long-Term Left Ventricular Infarct Size, Volumes, and Function

Objectives The purpose of this study was to investigate the reflections of the improvement in microvascular perfusion provided by adjuvant intracoronary streptokinase (ICSK) on late-phase infarct size and left ventricular volumes and functions

Infarct Remodeling Process During Long-term Follow-up After Reperfused Acute Myocardial Infarction

Background: After acute myocardial infarction (AMI), the recovery of perfusion in infarct area may lead to significant spontaneous infarct size (IS) reduction during the subsequent period. The natural course of infarct-healing process after reperfusion therapy has not been fully elucidated. In this study, we investigated the time course of the spontaneous infarct-healing process in patients with reperfused AMI. Methods and Results: Fifty-two patients with AMI who underwent primary percutaneous intervention were included. IS was measured with single-photon emission tomography using Bull's eye method at 4th day, at 5th, and at 10th months. IS was expressed as a percentage of the total myocardium. IS decreased by 33.6% at 5th month when compared with 4th day IS (from 26.3% +/- 18.8% to 17.5% +/- 12.9%, P < 0.001, n = 44). At 10th month, mean IS decreased by 21% when compared with 5th month IS (from 15.89% +/- 12.65% to 12.53% +/- 9.35%, P = 0.007, n = 31) and 49% when compared with 4th day IS (24.02% +/- 17.67% to 12.53% +/- 9.35%, P < 0.001). Conclusion: Significant endogenous recovery of perfusion in the infarct area occurs at the long term in patients with reperfused AMI, Infarct healing is a dynamic and ongoing process and decrease in IS continues long term after reperfused AMI

Neuromyelitis Optica and Neuromyelitis Optica Spectrum Disorder Patients in Turkish Cohort Demographic, Clinical, and Laboratory Features

Background: Neuromyelitis optica (NMO) is an immune-mediated, chronic relapsing, inflammatory disease characterized by severe attacks of optic neuritis and myelitis