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.
Pleurisy: Causes, Symptoms, and Treatments. Pleurisy, also known as pleuritis, is a condition where the linings of the lungs and chest become inflamed. The pleural cavity - the area between the lungs and inner chest wall - sits between two lubricated surfaces, called pleura. The inner pleura lines the lungs and the outer lines the chest wall. A variety of factors can cause the pleura to become inflamed, this is called pleurisy.