Pyrosequencing analysis of bacterial community changes in dental unit waterlines after chlorogenic acid treatment.

Introduction: The contamination of dental unit waterlines (DUWLs) poses a significant risk of cross-infection in dentistry. Although chemical disinfectants have been effective in reducing number of bacteria, they do have limitations.

Methods: This study aimed to investigate the potential of chlorogenic acid, a natural substance with broadspectrum antibacterial properties, for treating DUWLs.

Electric field induced intra-molecular self-redox: superalkali LiNMg as a candidate for NLO molecular switches.

A novel intra-molecular self-redox switch, LiNMg, is constructed theoretically. Our investigation showed that a suitably oriented external electric field (OEEF) can drive a long-range excess electron transfer from Mg atoms to Li rings. And subsequently, an interesting intra-molecular self-redox from LiNMg to LiNMg accompanying the large different electronic static first hyperpolarizability (β) is exhibited.

Aged human cells rejuvenated by cytokine enhancement of biomaterials for surgical ventricular restoration.

Objectives: This study investigated whether cytokine enhancement of a biodegradable patch could restore cardiac function after surgical ventricular restoration (SVR) even when seeded with cells from old donors.

Background: SVR can partially restore heart size and improve function late after an extensive anterior myocardial infarction. However, 2 limitations include the stiff synthetic patch used and the limited healing of the infarct scar in aged patients.