نتایج جستجو برای: hot melt extrusion
تعداد نتایج: 106579 فیلتر نتایج به سال:
the human mdr1 gene encodes for a p-glycoprotein (pgp), which acts as an efflux pump that transports a large variety of substrates from the inside of cells to the outside until protection against xenobiotics. the g2677t/a polymorphism in exon 21 is associated with pgp expression and function in humans. the present study was aimed to determine the frequencies of this polymorphism in a healthy po...
As is well known, the extrusion rate of polymers from a cylindrical tube or slit (a "die") is in practice limited by the appearance of "melt fracture" instabilities which give rise to unwanted distortions or even fracture of the extrudate. We present the results of a weakly nonlinear analysis which gives evidence for an intrinsic generic route to melt fracture via a weakly nonlinear subcritical...
Polymers are known to exhibit various flow instabilities during extrusion in which a molten polymer is forced to flow through a narrow die, in order to form a strand or acquire a desired shape of the final product. Recent developments in experimental techniques revealed that some of the instabilities are interfacial in nature, that is originate from the violation of the no-slip boundary conditi...
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