Experimental chip

An apparatus comprising:

• a body having a first end, a second end, and an inner cavity;
• a first plurality of anchor pins positioned within the inner cavity;
• a second plurality of anchor pins within the inner cavity;
• the inner cavity having a central cavity between the first plurality of anchor pins and the second plurality of anchor pins;
• the inner cavity having a single media channel positioned outside of the first plurality of anchor pins and extending substantially continuously to a position outside the second plurality of anchor pins, the media channel in fluid communication with the central cavity through openings between individual pins of the first plurality of anchor pins and through openings between individual pins of the second plurality of anchor pins, wherein the openings between individual pins of the first plurality of anchor pins and the openings between individual pins of the second plurality of anchor pins restrict complete fluid transfer between the media channel and the central cavity and allow molecular migration between the media channel and the central cavity;
• a first post positioned in the central cavity;
• a second post positioned in the central cavity;
• a first port positioned in the central cavity;
• a second port positioned in the central cavity;
• a third port in an exterior of the body located at the first end, the third port in fluid communication with the media channel;
• and
• a fourth port in the exterior of the body located at the first end, the fourth port in fluid communication with the media channel;
• and
• wherein the third port and the fourth port enable fluid to be injected into the media channel.