Abstract: Microfluidic devices and methods for focusing components in a fluid sample are described herein. The microfluidic device has at least one flow focusing channel where the components are focused or re-oriented by the geometry of the channel. From an upstream end of the flow focusing channel to a downstream end of the flow focusing channel, at least a portion of the flow focusing channel has a reduction in height and at least a portion of the flow focusing channel narrows in width, thereby geometrically constricting the flow focusing channel. The devices and methods can be utilized in sex-sorting of sperm cells to improve performance and increase eligibility.

Abstract: A method of disinfecting or cleaning a body part of an animal including the steps of: impregnating a web of material with a disinfectant liquid and capable of generating a foam; causing the liquid within the web to foam; applying foaming liquid to the body part with the web including wiping the animal body part with the impregnated web; allowing the foaming liquid thus applied to the body part to evaporate from the body part.