"Ultrafiltrate" Natural Recordings by Native Speakers
A type of liquid that has been filtered using a semi-permeable membrane to remove very fine particles and solutes. It is typically more concentrated than plasma or serum, but less concentrated than the original solution.
Ultraday cycles, also known as ultradian rhythms, refer to physical, psychological, or biological oscillations that occur over a period shorter than 24 hours or a full day. These cycles can be found in various bodily functions, such as heart rate, breathing, and sleep patterns.