Chemotaxis (from chemo- + taxis) is the movement of an organism in response to a chemical stimulus. Somatic cells, bacteria, and other single-cell or multicellular organisms direct their movements according to certain chemicals in their environment.
It will be good for up to six months, in the vacuum seal, if stored in the refrigerator. If frozen in the vacuum seal, it can last for about 1 year. Once the sample is removed from the vacuum seal, it should not remain at room temperature for more than 18 hours. It will keep in the refrigerator, unsealed, for 30 days.
Another way of looking at how long a transplanted kidney is likely to last is to look at the percentage chance that the kidney will be working at set time points.1  a 90% chance (eight or nine out of ten) of working one year after the operation. 2  a 60% chance (six out of ten) of lasting five years;nother way of looking at how long a transplanted kidney is likely to last is to look at the percentage chance that the kidney will be working at set time points.