Most of the time, though, LDAP is used to search for information in the directory. The LDAP search operation allows some portion of the directory to be searched for entries that match some criteria specified by a search filter.
It has good low temperature flexibility and is superior to most elastomers in compression set, cold flow and abrasion resistance. However, it does not possess good resistance to ozone, sunlight or weather. Buna-N has a temperature range of -40 to+135 C (-40 to 275 F).
The BUN (Blood Urea Nitrogen) test basically is used to give an idea of how well your kidneys are working. BUN range for adults is around 6-20 mg/dL. The fact your BUN is 21 isn't necessarily reason for concern. Many factors (including various medications) can affect the BUN result, and 21 might even be normal for you. It's hard to say without some past lab results to compare with.