of curaua and piassava ï¬bers. In this ï¬gure, two points should be noted. First, that the average length of curaua, 846 mm, and piassava, 455 mm, are more than 15 times their criti-Figure 1. Automobile components made of natural-ï¬ber-reinforced composites. 25 Figure 2. The dimensional distribution of commercial ï¬bers of (a) curaua and (b)
The treatment of aggressive diseases often benefits very noticeably from combination therapy, especially when involving the immune system. In fact, one often-cited combination therapy is HAART: Highly Active Antiretroviral Therapy used in the treatment of HIV. With six major types of drugs being used in this combination therapy, each slows or disrupts the replication of HIV cells in different ways.
Drug resistance means a personâs HIV treatment no longer prevents the virus from multiplying. This usually happens if treatment has not been taken correctly, allowing the virus to mutate. Stages of the HIV life cycle. 1. Binding and fusion. First, the HIV virus attaches itself to a T-helper cell and releases HIV into the cell. Drugs that can stop this part of the process are called fusion or entry inhibitors. 2. Conversion and integration. Once inside the cell, HIV changes its genetic material so it can enter the nucleus of the cell and take control of it.