Abstract: The present invention relates to methods and means for producing nitrogenase polypeptides in the mitochondria of plant cells.

Abstract: A spa tub includes a spa shell configured to contain a volume of water; a circulation system configured to create a flow of the water to and from the spa shell; and a testing system configured to acquire water samples from the volume of water and to perform water quality tests on the water samples. The testing system includes a housing; a circulation pump disposed within the housing configured to acquire the water samples from the volume of water; a replaceable reagent cartridge removably received within the housing; and a water test assembly disposed within the housing. The water test assembly is configured to receive the water samples acquired by the circulation pump and a reagent from the reagent cartridge. The water test assembly is configured to mix the water samples and the reagent and to perform the water quality tests on the mixed water samples and reagent.

Abstract: An apparatus for dispensing a liquid is disclosed. The apparatus can include a cap configured to connect to a container body having a chamber for containing the liquid. The cap can include a fill aperture through which the liquid is supplied to the container body and a pour aperture through which the liquid exits the apparatus. A fill lid can be rotatable about a pivot axis in a first direction to close the fill aperture and rotatable about the pivot axis in a second direction to open the fill aperture, the first direction opposite the second direction. A pour lid can be rotatable about the pivot axis in the first direction to open the pour aperture and rotatable about the pivot axis in the second direction to close the pour aperture. A filter assembly comprising a filter cartridge can connect to the cap.

Abstract: As an example, a walker includes a first leg pair, a second leg pair and a cross beam connecting the first and second leg pairs in a parallel, spaced apart relationship. Each leg pair includes a U-shaped tube defining a front leg and a rear leg. A front strut is telescopically movable within the front leg and extends outwardly therefrom. A rear strut is telescopically movable within the rear leg and extends outwardly therefrom. A mechanical linear actuator includes a rotating element adapted to rotate relative to at least one of the front leg or the rear leg. The rotating element includes an interface with a track on the respective strut relative to which the rotating element rotates, whereby rotational motion of the rotating element translates to corresponding linear motion of the strut.

Abstract: As an example, a walker includes a first leg pair, a second leg pair and a cross beam connecting the first and second leg pairs in a parallel, spaced apart relationship. Each leg pair includes a U-shaped tube defining a front leg and a rear leg. A front strut is telescopically movable within the front leg and extends outwardly therefrom. A rear strut is telescopically movable within the rear leg and extends outwardly therefrom. A mechanical linear actuator includes a rotating element adapted to rotate relative to at least one of the front leg or the rear leg. The rotating element includes an interface with a track on the respective strut relative to which the rotating element rotates, whereby rotational motion of the rotating element translates to corresponding linear motion of the strut.

Abstract: A load balancing arm for a medical device support system. The load balancing arm includes a proximal hub, an adjustable bearing element, a support arm, a spring and a link. A distal end of the support arm is configured to support a medical device load and a proximal end is pivotably mounted to a main bearing element for pivotable movement about a main pivot axis. The spring extends within a cavity of the support arm and is mounted to exert a biasing force between the main pivot axis and a distal end of the spring. The link has a proximal end pivotably mounted to the adjustable bearing element for pivotable movement about an adjustable pivot axis, and a distal end pivotably mounted to the distal end of the spring such that the biasing force exerted by the spring is transmitted through the link to the adjustable bearing element.

Abstract: An apparatus for dispensing a liquid is disclosed. The apparatus can include a cap configured to connect to a container body having a chamber for containing the liquid. The cap can include a fill aperture through which the liquid is supplied to the container body and a pour aperture through which the liquid exits the apparatus. A fill lid can be rotatable about a pivot axis in a first direction to close the fill aperture and rotatable about the pivot axis in a second direction to open the fill aperture, the first direction opposite the second direction. A pour lid can be rotatable about the pivot axis in the first direction to open the pour aperture and rotatable about the pivot axis in the second direction to close the pour aperture. A filter assembly comprising a filter cartridge can connect to the cap.

Abstract: Aerosol-free spray devices are provided. According to some embodiments, an aerosol-free spray device includes a piston operable within a piston chamber and coupled to a vacuum plunger operable within a vacuum chamber. Each component, including valves, of the aerosol-free spray device is composed of recyclable material of the same resin identification number. With the entire device made of material of the same resin identification number, the spray device is entirely and easily recyclable.

Abstract: A spa tub includes a spa shell configured to contain a volume of water; a circulation system configured to create a flow of the water to and from the spa shell; and a testing system configured to acquire water samples from the volume of water and to perform water quality tests on the water samples. The testing system includes a housing; a circulation pump disposed within the housing configured to acquire the water samples from the volume of water; a replaceable reagent cartridge removably received within the housing; and a water test assembly disposed within the housing. The water test assembly is configured to receive the water samples acquired by the circulation pump and a reagent from the reagent cartridge. The water test assembly is configured to mix the water samples and the reagent and to perform the water quality tests on the mixed water samples and reagent.

Abstract: As an example, a walker includes a first leg pair, a second leg pair and a cross beam connecting the first and second leg pairs in a parallel, spaced apart relationship. Each leg pair includes a U-shaped tube defining a front leg and a rear leg. A front strut is telescopically movable within the front leg and extends outwardly therefrom. A rear strut is telescopically movable within the rear leg and extends outwardly therefrom. A mechanical linear actuator includes a rotating element adapted to rotate relative to at least one of the front leg or the rear leg. The rotating element includes an interface with a track on the respective strut relative to which the rotating element rotates, whereby rotational motion of the rotating element translates to corresponding linear motion of the strut.

Abstract: A load balancing arm for a medical device support system. The load balancing arm includes a proximal hub, an adjustable bearing element, a support arm, a spring and a link. A distal end of the support arm is configured to support a medical device load and a proximal end is pivotably mounted to a main bearing element for pivotable movement about a main pivot axis. The spring extends within a cavity of the support arm and is mounted to exert a biasing force between the main pivot axis and a distal end of the spring. The link has a proximal end pivotably mounted to the adjustable bearing element for pivotable movement about an adjustable pivot axis, and a distal end pivotably mounted to the distal end of the spring such that the biasing force exerted by the spring is transmitted through the link to the adjustable bearing element.

Abstract: In one embodiment, an apparatus for dispensing a liquid is disclosed. The apparatus can comprise a cap configured to connect to a container body having a chamber for containing the liquid. The cap can comprise a pour aperture through which the liquid exits the apparatus. The cap can comprise a pour lid configured to open and close the pour aperture. The cap can comprise a cap vent configured to allow air to flow from the outside environs into the chamber of the container body when the cap is connected to the container body.

Abstract: An apparatus for dispensing a liquid is disclosed. The apparatus can include a cap configured to connect to a container body having a chamber for containing the liquid. The cap can include a fill aperture through which the liquid is supplied to the container body and a pour aperture through which the liquid exits the apparatus. A fill lid can be rotatable about a pivot axis in a first direction to close the fill aperture and rotatable about the pivot axis in a second direction to open the fill aperture, the first direction opposite the second direction. A pour lid can be rotatable about the pivot axis in the first direction to open the pour aperture and rotatable about the pivot axis in the second direction to close the pour aperture. A filter assembly comprising a filter cartridge can connect to the cap.