Abstract: A mitochondria extraction apparatus provided in the present invention includes a container used for holding a mixture fluid and a diafiltration assembly disposed in the container and used for isolating mitochondria. A basement of the mitochondria extraction apparatus is disposed in the container. During a circular motion of the mitochondria extraction apparatus, a centrifugal force in the mitochondria extraction apparatus acts on the mixture fluid in a hole-shaped microfluidic channel included in the diafiltration assembly, so as to provide a pushing force for the mixture fluid, enabling the mixture fluid to rapidly flow in the microfluidic channel for diafiltration.

Abstract: A liquid releasing device for a water tank includes a container disposed in the water tank for receiving liquid therein, a float-controlled valve assembly mounted on a bottom wall of the container for releasing the liquid in the container when water level in the water tank drops below a predetermined level, and an adjustable mounting unit for mounting the container on a rim of the water tank. The mounting unit includes an elongated first support member mounted slidably on a top surface of the container, and an elongated second support member mounted slidably and longitudinally to the first support member. The second support member has one end portion formed with a hook portion, and another end portion connected slidably to the first support member. The first support member has a distal end adjacent to the hook portion.