Systems and methods for biological analysis

1. A case for containing a plurality of biological samples, the case comprising:

a base comprising a bottom surface and plurality of side walls, the bottom surface and walls forming a cavity having a top opening;

a fill port disposed within the base and configured to provide a port into the cavity;

a substrate disposed inside the cavity and comprising a plurality of reaction regions configured to receive one or more biological samples, the substrate configured to be received into the cavity through the top opening; and

a plug assembly comprising a plug and a plug driver, the plug comprising a distal end, the plug driver attached to the plug by an adhesive, a solder joint, or a weld joint;

wherein the plug driver is configured to screw the distal end of the plug into the fill port using a first force or torque and to fracture or break the adhesive, solder joint, or weld joint using a second force or torque that is higher than the first force or torque.

2. The case of claim 1 , wherein the substrate comprises a first surface and an opposing second surface, and the plurality of reaction regions comprises a plurality of through-holes disposed between the surfaces.

3. The case of claim 2 , further comprising a cover having an inner surface, the inner surface having a central portion disposed over the plurality of reaction regions and a recessed portion surrounding the central portion.

4. The case of claim 1 , wherein the reaction regions are through-holes.

5. A system for analyzing biological samples, the system comprising:

the case of claim 1 ; and

a thermal controller configured to maintain and/or cycle a temperature environment of the biological samples.

6. The system of claim 5 , further comprising:

an excitation source for illuminating the case; and

an optical sensor for sensing fluorescent signals.

7. A system for analyzing a plurality of biological samples comprising:

a case comprising:

a base comprising a bottom surface and one or more side walls, the bottom surface and walls forming a cavity having a top opening;

a fill port disposed in the base and configured to provide access to the cavity;

a substrate disposed inside the cavity and comprising a plurality of reaction regions configured to receive one or more biological samples; and

a cover configured to cover the top opening; and

a plug assembly, the plug assembly comprising:

a plug configured to be received in the fill port so as to fluidically seal the fill port, and

a plug driver configured to be removably attached to the plug by an adhesive, a solder joint, or a weld joint and configured to screw the plug into the fill port.

8. The system of claim 7 , wherein the plug driver is configured to separate from the plug in response to a torque applied to the plug driver meeting a threshold.

9. The system of claim 7 , further comprising:

a thermal controller configured to maintain and/or cycle a temperature environment of the biological samples;

an excitation source for illuminating the case; and

an optical sensor for sensing fluorescent signals.

10. The system of claim 7 , wherein the cover of the case has an inner surface including a central portion disposed over the plurality of reaction regions and a recessed portion surrounding the central portion.

11. The system of claim 10 , wherein the central portion has contours configured to direct air bubbles away from the central portion to the recessed portion.

12. A method comprising:

providing a case comprising:

a base comprising a bottom surface and plurality of side walls, the bottom surface and walls forming a cavity having a top opening;

a fill port disposed within the base and configured to provide a port into the cavity;

a substrate disposed inside the cavity and comprising a plurality of reaction regions configured to receive one or more biological samples, the substrate configured to be received into the cavity through the top opening; and

a plug assembly comprising a plug and a plug driver, the plug comprising a distal end, the plug driver attached to the plug by an adhesive, a solder joint, or a weld joint;

wherein the plug driver is configured to screw the distal end of the plug into the fill port using a first force or torque and to fracture or break the adhesive, solder joint, or weld joint using a second force or torque that is higher than the first force or torque;

loading one or more biological samples into at least some of the reaction regions;

enclosing the substrate within the cavity by locating a cover over base;

filling the cavity with a fluid via the fill port;

attaching the plug assembly to the fill port by applying the first force or torque; and

applying the second force or torque to fracture or break the adhesive, solder joint, or weld joint.

13. The method of claim 12 , further comprising:

mounting the base, the substrate, and the cover into an instrument; and

operating the instrument to monitor a biological reaction in one or more through-holes of the substrate.

14. The method of claim 12 , wherein the substrate comprises a first surface and an opposing second surface, and the plurality of reaction regions comprises a plurality of through-holes disposed between the surfaces, the through-holes configured to receive one or more biological samples.

15. The method of claim 12 , wherein the cover comprises an inner surface in contact with the fluid, the inner surface including a central portion disposed over a plurality of through-holes disposed in the substrate and a recessed portion surrounding the central portion.

16. The method of claim 15 , further comprising introducing a gas into the cavity, wherein the gas is substantially confined within the recessed portion.

17. The method of claim 16 , wherein the gas comprises a plurality of air bubbles.

18. The method of claim 16 , wherein introducing a gas into the cavity occurs simultaneously with filling the cavity.