1.4 Chemical Determination. Proteins are complex, organic compounds composed of many amino acids linked together through peptide bonds and cross-linked between chains by sulfhydryl bonds, hydrogen bonds and van der Waals forces.
What causes pleurisy? In young, healthy people, an infection of the lower respiratory system by a virus or bacteria may cause pleurisy. Pleurisy usually lasts a few days to 2 weeks. In very rare cases, the virus or bacteria may spread and cause pleurisy in others. Other causes of pleurisy include air leaking into the pleural cavity from a hole in a lung (pneumothorax), injury to the chest (such as a broken rib), tuberculosis or other infections, or a tumor in the pleura.
Soothe lungs by placing a soft pillow against the chest cavity if there are broken ribs. This will reduce the splinters and prevent damage to the lungs. Treat simple pneumothorax by removing the air in the chest cavity using a catheter. Inhaling 100% oxygen can cause spontaneous re-expansion of the collapsed lung. If this condition is persistent and happens very often, a surgical procedure called pleurodesis is to be performed.