Abstract:
Described herein are various embodiments of a valve that may be opened and closed using a thixotropic or “stress yield” material, or other material that temporarily changes phase upon application of energy to the material. More particularly, some embodiments may include a valve that is opened and closed using a granular gel that is a temporary phase change material.
Abstract:
Various examples are provided for progressive cavity pumps and motors. In one example, among others, a progressive cavity pump (or motor) includes a stator having a hyperboloidal internal bore including a plurality of spiral lobes, and a rotor comprising a plurality of spiral lobes positioned within the hyperboloidal internal bore of the stator. A longitudinal axis of the rotor is non-planar, non-parallel, and non-intersecting with a longitudinal axis of the stator. The stator can include an elastomeric material coating the hyperboloidal internal bore of the stator, which can reduce the effect of friction and abrasion during operation. The elastomeric material can include fluoro-based elastomers, other elastomeric materials or combinations thereof. For example, a fluoromonomer such as tetrafluoroethylene (TFE) or a fluoropolymer such as polytetrafluoroethylene (PTFE) can be used. The rotor can be configured to allow for displacement to adjust an interference fit between the rotor and the stator.
Abstract:
A three-dimensional cell growth medium is described. The cell growth medium may comprise hydrogel particles swollen with a liquid cell growth medium to form a granular gel yield stress material which undergoes a phase transformation from a solid phase to a liquid-like phase when an applied stress exceeds the yield stress. Cells may be placed in the three-dimensional cell growth medium according to any shape or geometry, and may remain in place within the three-dimensional cell growth medium.
Abstract:
Embodiments of the present disclosure provide for mixtures, methods for making mixtures, articles, methods for making articles, and methods of using articles.
Abstract:
A three-dimensional cell growth medium is described. The cell growth medium may comprise hydrogel particles swollen with a liquid cell growth medium to form a granular gel yield stress material which undergoes a phase transformation from a solid phase to a liquid-like phase when an applied stress exceeds the yield stress. Cells may be placed in the three-dimensional cell growth medium according to any shape or geometry, and may remain in place within the three-dimensional cell growth medium.
Abstract:
Embodiments of the present disclosure provide for lubricious structures (also referred to simply as “structure”), methods of making lubricious structures, methods of using lubricious structures, and the like.