Why We Vomit. In many cases, throwing up is a protective reflex to rid your body of viruses, bacteria, or parasites in your digestive system. âIf you were to eat something that was spoiled or poisoned, your body would get a signal that something was wrong,â says Bruno Chumpitazi, MD, of Texas Childrenâs Hospital.
Parafilm is ideal for the scientific laboratory because it is a thermoplastic, self-sealing film. It holds moisture loss to a minimum. It offers excellent protection for the contents of tubes, flasks, and petri dishes.
In most cases, if the brand is unknown, using the term document camera or document projector is advisable. The main purpose of this type of projector is to display documents and other objects that are not translucent â in other words, documents that are not made with transparencies. This requires a video camera, which is usually digital, and a projection lens in order to work properly.