Abstract: Provided herein is a method for coating an orthodontic elastomeric ligature tie with fluoride in which a solution of a coating medium, for example, polycaprolactone, containing calcium fluoride is coated and dried on the O-ring. Also provided are the coated orthodontic elastomeric ligature ties as prepared by the method and oral devices to re-mineralize decalcified tooth enamel lesions. Methods for treating demineralization in tooth enamel with the coated orthodontic elastomeric ligature ties, for re-mineralizing decalcified tooth enamel lesion in subjects with orthodontia and for optimizing time-release of fluoride from the coated orthodontic elastomeric ligature tie are provided. A kit to prepare the coated orthodontic elastomeric ligature tie is provided.

Abstract: The invention features solutions of water-soluble, oxygen-resistant redox-active species circulated in flow cells to electrochemically capture CO2 from air or flue gas and release pure CO2. The method is safe, scalable, and potentially inexpensive, as it utilizes non-volatile and potentially low-cost redox organic and inexpensive inorganic species and can operate at ambient temperature and pressure and can operate at high current densities.

Abstract: A negative stiffness generating mechanism and a quasi-zero stiffness vibration isolator are provided. A housing is mounted on a base, and the axial relative positions of the housing and the base can be adjusted; a negative stiffness unit comprises inner-ring magnets, outer-ring magnets and a supporting shaft, the supporting shaft axially slides on the base and passes through the housing, the inner-ring magnets fixedly sleeve the supporting shaft, and the outer-ring magnets sleeve outside the inner-ring magnets and are divided into upper and lower groups of outer-ring magnets; the upper and lower groups of outer-ring magnets can synchronously move through a negative stiffness adjusting device; and the axial relative positions of the middle planes of the outer-ring and inner-ring magnets can be adjusted by adjusting the axial relative positions of the housing and the base. The isolator comprises a negative stiffness generating mechanism and a positive stiffness unit.

Abstract: The invention relates to synthetic methods for the functionalization of an anthraquinone molecule comprising at least one amino-or carbonyl-substituent. In some aspects of the invention, the synthetic functionalization of the anthraquinone molecule takes place electrochemically within a divided electrolytic cell, e.g., the cell of a redox flow battery.

Abstract: The invention provides methods of electrochemically rebalancing electrochemical systems such as flow batteries and electrochemical CO2 capture systems. Electrochemical imbalances due to reaction with molecular oxygen can lead to capacity loss. The loss of capacity may be mitigated by electrically oxidizing the excess hydroxide ions to produce gaseous O2, which can be removed by de-gassing methods.

Abstract: The invention provides flow batteries and methods of using flow batteries that reduce loss of capacity. The loss of capacity may be mitigated by electrically oxidizing an organic species in the negolyte.

Abstract: A magnetic suspension type sensing system for space full-degree-of-freedom absolute poses is provided. The system includes a reference platform, multiple quasi-zero stiffness supporting legs and a platform to be tested. The reference platform and the platform to be tested are connected in a spherical hinge mode through the multiple quasi-zero stiffness supporting legs. Each of the multiple quasi-zero stiffness supporting legs includes a lower end spherical hinge, a lower end cover, a positive stiffness unit, a negative stiffness unit, a shaft, a lower end shell, an upper end shell and an upper end spherical hinge.

Abstract: A negative stiffness generating mechanism and a quasi-zero stiffness vibration isolator are provided. A housing is mounted on a base, and the axial relative positions of the housing and the base can be adjusted; a negative stiffness unit comprises inner-ring magnets, outer-ring magnets and a supporting shaft, the supporting shaft axially slides on the base and passes through the housing, the inner-ring magnets fixedly sleeve the supporting shaft, and the outer-ring magnets sleeve outside the inner-ring magnets and are divided into upper and lower groups of outer-ring magnets; the upper and lower groups of outer-ring magnets can synchronously move through a negative stiffness adjusting device; and the axial relative positions of the middle planes of the outer-ring and inner-ring magnets can be adjusted by adjusting the axial relative positions of the housing and the base. The isolator comprises a negative stiffness generating mechanism and a positive stiffness unit.

Abstract: A magnetic suspension type sensing system for space full-degree-of-freedom absolute poses is provided. The system includes a reference platform, multiple quasi-zero stiffness supporting legs and a platform to be tested. The reference platform and the platform to be tested are connected in a spherical hinge mode through the multiple quasi-zero stiffness supporting legs. Each of the multiple quasi-zero stiffness supporting legs includes a lower end spherical hinge, a lower end cover, a positive stiffness unit, a negative stiffness unit, a shaft, a lower end shell, an upper end shell and an upper end spherical hinge.

Abstract: Disclosed is a quasi-zero stiffness absolute displacement sensor based on electromagnetic positive stiffness, and relates to the technical field of vibration measurement. The quasi-zero stiffness absolute displacement sensor comprises an eddy current displacement sensor unit, a negative stiffness unit, an intermediate connector, a positive stiffness unit, a bottom shell and a motion axis. The damping of the mechanism can be effectively reduced, the service life of the system is prolonged, and the mechanism size is reduced. By adjusting the number of layers of permanent magnets and coils in the electromagnetic positive stiffness unit and the electromagnetic negative stiffness unit and controlling the magnitude of current in the coils, electromagnetic force between the permanent magnets and the electromagnetic coils can be changed, the magnitude of positive stiffness and the magnitude of negative stiffness are adjusted, and control over the stiffness of the whole system is achieved.

Abstract: Disclosed is a quasi-zero stiffness absolute displacement sensor based on electromagnetic positive stiffness, and relates to the technical field of vibration measurement. The quasi-zero stiffness absolute displacement sensor comprises an eddy current displacement sensor unit, a negative stiffness unit, an intermediate connector, a positive stiffness unit, a bottom shell and a motion axis. The damping of the mechanism can be effectively reduced, the service life of the system is prolonged, and the mechanism size is reduced. By adjusting the number of layers of permanent magnets and coils in the electromagnetic positive stiffness unit and the electromagnetic negative stiffness unit and controlling the magnitude of current in the coils, electromagnetic force between the permanent magnets and the electromagnetic coils can be changed, the magnitude of positive stiffness and the magnitude of negative stiffness are adjusted, and control over the stiffness of the whole system is achieved.

Abstract: An improved lead acid battery (LAB) battery may provide high charge acceptance and may be suitable for a wide range of applications, including a variety of new applications. The new battery can sustain 67% of the maximum capacity even at a very high charging rate of IOC. This battery may decrease the use of lead in comparison to prior lead acid battery designs by up to 50%.

Abstract: An improved lead acid battery (LAB) battery may provide high charge acceptance and may be suitable for a wide range of applications, including a variety of new applications. The new battery can sustain 67% of the maximum capacity even at a very high charging rate of IOC. This battery may decrease the use of lead in comparison to prior lead acid battery designs by up to 50%.