monk. n. A man who is a member of a brotherhood living in a monastery and devoted to a discipline prescribed by his order: a Carthusian monk; a Buddhist monk.
Complete Blood Count (CBC): EDTA tubes (purple top): Purple top tubes should be 50-60% full. Do not overfill tubes. Gently mix specimen by inverting 5-10 times and place it on a rocker for up to 30 minutes, then refrigerate at 2-8Â°C. When a differential is required as part of a CBC, slides must be prepared within 12 hours of blood collection. Refrigerated EDTA blood is stable for CBC for up to 24 hours.
This researcher is measuring turbidity in a glacial lake using a Secchi disk. The disk is lowered into the water until it can no longer be seen, and the depth of disappearance is recorded. Photo provided by Monica Bruckner. turbidity tube, or T-tube, can be used as an alternative to lowering a Secchi disk through the water column. The T-tube is a plastic tube with a small-scale Secchi disk pattern at its base. Water samples can be poured into the tube and the clarity of the bottom disk can be used to reveal turbidity.