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Cell extrusion, discovered in 2001, [1] is a process conserved in epithelial from humans to sea sponge [2] to seamlessly remove unwanted or dying cells while maintaining the integrity of the epithelial barrier. [3] If cells were to die without extrusion, gaps would be created, compromising the epithelia's function.
Hot extrusion is a hot working process, which means it is done above the material's recrystallization temperature to keep the material from work hardening and to make it easier to push the material through the die. Most hot extrusions are done on horizontal hydraulic presses that range from 230 to 11,000 metric tons (250 to 12,130 short tons ...
Before use, the two halves are separated, and the capsule is filled with powder or more normally pellets made by the process of extrusion and spheronization (either by placing a compressed slug of powder into one half of the capsule or by filling one half of the capsule with loose powder) and the other half of the capsule is pressed on.
Depiction of the loop extrusion process where a loop extruder lands (top), extrudes a loop (middle), and unbinds (bottom). Loop extrusion is a major mechanism of Nuclear organization. It is a dynamic process in which structural maintenance of chromosomes (SMC) protein complexes progressively grow loops of DNA or chromatin.
Extrusion-based printing is a very common technique within the field of 3D printing which entails extruding, or forcing, a continuous stream of melted solid material or viscous liquid through a sort of orifice, often a nozzle or syringe. [22] When it comes to extrusion based bioprinting, there are four main types of extrusion.
Coffin birth, also known as postmortem fetal extrusion, [1] [2] is the expulsion of a nonviable fetus through the vaginal opening of the decomposing body of a deceased pregnant woman due to increasing pressure from intra-abdominal gases.
Multi-antimicrobial extrusion protein (MATE) also known as multidrug and toxin extrusion or multidrug and toxic compound extrusion is a family of proteins which function as drug/sodium or proton antiporters.
During an extrusion process it is essential to consider the surface finish of exposed product surfaces. As a general rule, the narrower an exposed surface, the more uniform its finish becomes. Webs, flanges and abrupt changes in metal thickness may show up as marks on the opposite surface of an extrusion, particularly on thin sections. The ...