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.
Pleural fluid analysis is also known as thoracentesis. Itâs a procedure used to drain excess fluid from the space outside of the lungs but inside the chest cavity. Normally, this area contains about 20 milliliters of clear or yellow fluid. If thereâs excess fluid in this area, it can cause symptoms such as shortness of breath and coughing.