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.
How Long Is It Okay to Hold It? Your body's physical capacity to keep in urine is based on a few things: Most of the time women can hold urine for three to six hours, but this will vary, says Brucker. It really depends on the amount of urine that someone makes, which is determined by hydration status and fluid intake, and also functional bladder capacity, which is a combination of the actual size of the bladder and bladder sensitivity.