NCJ Number
29836
Journal
Journal of Forensic Sciences Volume: 20 Issue: 4 Dated: (OCTOBER 1975) Pages: 668-673
Date Published
1975
Length
6 pages
Annotation
DESCRIPTION OF THE CONSTRUCTION AND USE OF AN APPARATUS DESIGNED TO RAPIDLY CONSTRUCT SEVERAL IDENTICAL GRADIENT TUBES SIMULTANEOUSLY.
Abstract
THE BASIC CONCEPT OF THE APPARATUS IS A RECTANGULAR TANK IN WHICH A GRADIENT IS PREPARED AND INTO WHICH A SET OF TUBES, OPEN AT BOTH ENDS, ARE SIMULTANEOUSLY LOWERED. IF THE GRADIENT IN THE TANK IS ALLOWED TO EQUILIBRATE AND THE TUBES ARE LOWERED SUFFICIENTLY SLOWLY, IDENTICAL GRADIENTS WILL EXIST IN EACH OF THE TUBES. THE ADVANTAGES CONSIST OF RAPID, SIMULTANEOUS FILLING OF SEVERAL TUBES WITH IDENTICAL DENSITY GRADIENTS AND OF THE CAPABILITY TO REMOVE INDIVIDUAL FRACTIONS FROM THE TUBES FOR FURTHER STUDY. DISADVANTAGES ARE THAT AN EXTRA QUANTITY OF LIQUIDS IS REQUIRED AND ONLY A PRESET NUMBER OF TUBES CAN BE FILLED AT ONE TIME. REFERENCES ARE INCLUDED. (AUTHOR ABSTRACT)