surfactant surÂ·facÂ·tant (sÉr-fÄk'tÉnt, sÃ»r'fÄk'-) n. A surface-active substance. A substance composed of lipoprotein that is secreted by the alveolar cells of the lung and serves to maintain the stability of pulmonary tissue by reducing the surface tension of fluids that coat the lung.
The Microsoft Exchange Information Store service uses a database engine called Extensible Storage Engine (ESE), which is a transaction-based database technology. In some troubleshooting instances or when moving from mixed to native mode, you may need to restart the Microsoft Exchange Information Store service. Procedure. To restart the Microsoft Exchange Information Store service. On the Start menu, click Run, type services.msc, and then click OK. In the Results pane, find the Microsoft Exchange Information Store service. Right-click the service, and then click Restart.
1 In Windows 8.1, select  Update and recovery  at the left, then  Recovery  on the left. 2  Now select  Restart now  under  Advanced startup  on the right. 3  The computer will display a Blue screen and bring you to the Advanced startup screen.4  Select Troubleshoot. 5  Under Troubleshoot you will see âRefreshâ and âResetâ. In Windows 8.1, select  Update and recovery  at the left, then  Recovery  on the left. 2  Now select  Restart now  under  Advanced startup  on the right. 3  The computer will display a Blue screen and bring you to the Advanced startup screen. 4  Select Troubleshoot. 5  Under Troubleshoot you will see âRefreshâ and âResetâ.