Benzene is used mainly as an intermediate to make other chemicals, above all ethylbenzene, cumene, cyclohexane, nitrobenzene, and alkylbenzene. More than half of the entire benzene production is processed into ethylbenzene, a precursor to styrene, which is used to make polymers and plastics like polystyrene and EPS. Some 20% of the benzene production is used to manufacture cumene, which is needed to produce phenol and acetone for resins and adhesives.
The main symptoms of a chest infection can include: 1  a persistent cough. 2  coughing up yellow or green phlegm (thick mucus), or coughing up blood. 3  breathlessness or rapid and shallow breathing. 4  wheezing. 5  a high temperature (fever). 6  a rapid heartbeat. 7  chest pain or tightness.
Leptospirosis is a biphasic disease that begins suddenly with fever accompanied by chills, intense headache, severe myalgia (muscle ache), abdominal pain, conjunctival suffusion (red eye), and occasionally a skin rash. The symptoms appear after an incubation period of 7â12 days. The first phase (acute or septicemic phase) ends after 3â7 days of illness. The disappearance of symptoms coincides with the appearance of antibodies against Leptospira and the disappearance of the bacteria from the bloodstream.