The filament in a light bulb is housed in a sealed, oxygen-free chamber to prevent combustion. In the first light bulbs, all the air was sucked out of the bulb to create a near vacuum -- an area with no matter in it. Since there wasn't any gaseous matter present (or hardly any), the material could not combust.
Sertraline is used for a number of conditions including: major depression, obsessive-compulsive disorder (OCD), body dysmorphic disorder (BDD), posttraumatic stress disorder (PTSD), premenstrual dysphoric disorder (PMDD), panic disorder and social phobia (social anxiety disorder).
L-arginine hydrochloride (HCL) is a formulation for the amino acid L-arginine that is sometimes used in dietary supplement. L-arginine HCL is used for exercise performance, erectile dysfunction, immune system performance and cardiovascular conditions, such as hypertension (high blood pressure).