DWK Life Sciences Potter-Elvehjem Tissue Grinders, PTFE Pestle and Unground Glass Tube

To progressively ground the sample into smaller pieces

Catalog Number	Mfr. No.	Capacity	Size
K886000-0021	DWK Life Sciences 8860000021	0.16 oz., 5mL	21
K886000-0019	DWK Life Sciences 8860000019	0.03 oz., 1mL	19
K886000-0022	DWK Life Sciences 8860000022	0.27 oz., 8mL	22
K886000-0023	DWK Life Sciences 8860000023	0.57 oz., 17mL	23
K886000-0024	DWK Life Sciences 8860000024	1.52 oz., 45mL	24

Description

To progressively ground the sample into smaller pieces

Tissue grinders produce homogenates by a combination of shearing and compression actions. The tissue sample is progressively ground (sheared) into smaller pieces at the rounded and of the pestle as the spinning pestle is lowered into the tube. As the pestle is forced lower into the tube, the sample is displaced and forced between the straight outside wall of the pestle and the inside wall of the tube, compressing the tissue cells untill they rupture. When the tube is pulled away from the pestle, a slight vacuum is created that pulls the sample back past the compression area, resulting in an additional homogenization stroke.

The degree of homogenization is controlled by the clearance between the pestle's and tube's cyclindrical section (radial distance usually 0.002 to 0.003 inches), the rotational speed of the pestle and the number of compression strokes made.

 

• Sizes 21 to 24 have radial serrations on the lower portion of the pestle to deliver the homogenate into the cylindrical portion of the tube
• Clearance between pestles and tubes is 0.004 to 0.006 in.
• Replacement components are available and completely interchangeable
• The lower portion of the pestle is round shaped
• Ground glass pestle versions are suited for connective tissues
• PTFE pestle versions are used with softer tissues

 

Specifications

• Includes: PTFE pestle and ungrounded Glass tube
• Clearance (English): 0.004 to 0.006 in.