EXHIBIT 21.1
| Subsidiaries of the Registrant | State of Incorporation | |
| 1) Astrogenetix, Inc. | Delaware | |
| 2) 1st Detect Corporation | Delaware | |
| 3) Agriculture Technology Corporation | Delaware | |
| 4) Medikinetix, Inc. | Delaware | |
| 5) Astral Images Corporation | Delaware | |
| 6) Astrotech Technologies, Inc. | Delaware | |
| 7) BreathTech Corporation | Delaware | |
| 8) AgLAB Inc. | Delaware | |
| 9) Cargo Security Center International, Inc. | Delaware | |
| 10) AgLAB Remediation Company, LLC | Delaware | |
| 11) Pro-Control, Inc. | Delaware | |
| 12) En-Scan, Inc. | Delaware |