Abstract: A flexible, collapsible vehicle door is provided that can be easily installed and uninstalled on a vehicle, without modification to the vehicle. The uninstalled door can be rolled up into a compact configuration allowing for storage. The collapsible door includes latches which secure the door to the top and bottom of the door frame. Straps on top and bottom of the door further hold the frame in place. The flexible door material rolls down from the top of the frame when needed for use. The door further attaches to the frame by way of two steel posts that fit the inside hinge openings on the stock vehicle body. A latch portion of the collapsible door may be used to secure the collapsible door in the closed position.

Abstract: A flexible, collapsible vehicle door is provided that can be easily installed and uninstalled on a vehicle, without modification to the vehicle. The uninstalled door can be rolled up into a compact configuration allowing for storage. The collapsible door includes latches which secure the door to the top and bottom of the door frame. Straps on top and bottom of the door further hold the frame in place. The flexible door material rolls down from the top of the frame when needed for use. The door further attaches to the frame by way of two steel posts that fit the inside hinge openings on the stock vehicle body. A latch portion of the collapsible door may be used to secure the collapsible door in the closed position.

Abstract: Embodiments disclosed herein relate to novel apparatuses, methods and systems employing said novel apparatuses, and sensors for use with said apparatuses and systems. In some embodiments, apparatuses and systems described herein are used to culture cells and/or detect changes in pH levels or dissolved oxygen and/or carbon dioxide levels in a cell culture sample resulting from the growth of living cells contained within a reaction vessel such as a flask. In some embodiments, said novel apparatuses may be used in combination with a rocker or shaking device or apparatus. The systems and methods may be used to detect changes in pH and dissolved gas levels in a liquid contained in the reaction vessel due to growth of living cells.