Abstract: A charged depth filter for removing cells and/or cellular debris from a biopharma feedstock having a first functionalized nonwoven layer having a first calculated pore size and a first dynamic charge capacity; a second functionalized nonwoven layer having a second calculated pore size and a second dynamic charge capacity positioned after the first functionalized nonwoven layer in the direction of the biopharma feedstock flow, and wherein the first calculated pore size is greater than the second calculated pore size, and the first dynamic charge capacity is less than the second dynamic charge capacity.

Abstract: A device includes: a complementary transistor including: a first transistor having a first source/drain region and a second source/drain region; and a second transistor stacked on the first transistor, and having a third source/drain region and a fourth source/drain region, the third source/drain region overlapping the first source/drain region, the fourth source/drain region overlapping the second source/drain region. The device further includes: a first source/drain contact electrically coupled to the third source/drain region; a second source/drain contact electrically coupled to the second source/drain region; a gate isolation structure adjacent the first and second transistors; and an interconnect structure electrically coupled to the first source/drain contact and the second source/drain contact.

Abstract: Asymmetric hollow fiber membranes, membrane contactors, and related production and use methods. The asymmetric hollow fiber membranes include a porous substrate having a multiplicity of pores, the porous substrate including at least a first semi-crystalline thermoplastic polyolefin copolymer derived by polymerizing at most 3 wt. % of linear or branched alpha olefin monomers with at least 97 wt. % of 4-methyl-1-pentene monomer. The asymmetric hollow fiber membranes also include a skin layer overlaying the porous substrate, the skin layer including a second semi-crystalline thermoplastic polyolefin copolymer derived by polymerizing at least 2 wt. % of linear or branched alpha olefin monomers with at most 98 wt. % of 4-methyl-1-pentene monomer. The skin layer is less porous than the porous substrate and forms an outer surface of the asymmetric hollow fiber membrane, while the porous substrate forms an inner surface of the hollow fiber membrane. The skin layer is preferably nonporous.

Abstract: Hollow fiber membranes, membrane contactors, and related production and use methods. The asymmetric hollow fiber membranes include a porous substrate having a multiplicity of pores and including at least one semi-crystalline thermoplastic polyolefin (co)polymer. A skin layer including at least one polydiorganosiloxane polyoxamide copolymer overlays the porous substrate. The skin layer is less porous than the porous substrate and forms an outer surface of the asymmetric hollow fiber membrane, while the porous substrate forms an inner surface of the hollow fiber membrane. The skin layer is preferably nonporous.

Abstract: Asymmetric hollow fiber membranes, membrane contactors, and related production and use methods. The asymmetric hollow fiber membranes include a porous substrate having a multiplicity of pores, the porous substrate including at least a first semi-crystalline thermoplastic polyolefin copolymer derived by polymerizing at most 3 wt. % of linear or branched alpha olefin monomers with at least 97 wt. % of 4-methyl-1-pentene monomer. The asymmetric hollow fiber membranes also include a skin layer overlaying the porous substrate, the skin layer including a second semi-crystalline thermoplastic polyolefin copolymer derived by polymerizing at least 2 wt. % of linear or branched alpha olefin monomers with at most 98 wt. % of 4-methyl-1-pentene monomer. The skin layer is less porous than the porous substrate and forms an outer surface of the asymmetric hollow fiber membrane, while the porous substrate forms an inner surface of the hollow fiber membrane. The skin layer is preferably nonporous.

Abstract: Hollow fiber membranes, membrane contactors, and related production and use methods. The membranes include a substrate having a multiplicity of pores and a skin layer overlaying the porous substrate. The porous substrate includes a first semi-crystalline thermoplastic polyolefin (co)polymer resin and a nucleating agent in an amount effective to achieve nucleation. The skin layer includes a second semi-crystalline thermoplastic polyolefin (co)polymer resin derived by polymerizing at most 98 wt. % of 4-methyl-1-pentene monomer with at least 2 wt. % of linear or branched alpha olefin monomers. Preferably, the first thermoplastic polyolefin (co)polymer is different from the second thermoplastic polyolefin (co)polymer. The skin layer is less porous than the porous substrate and forms an outer surface of the hollow fiber with the porous substrate forming an inner surface. The hollow fibers are formed by co-extruding the porous substrate resin and the skin layer resin through an annular die.

Abstract: Articles are described including a first microfiltration membrane layer having a first major surface and a second major surface disposed opposite the first major surface, and a first silica layer directly attached to the first major surface of the first microfiltration membrane layer. The first silica layer includes a polymeric binder and acid-sintered interconnected silica nanoparticles arranged to form a continuous three-dimensional porous network. A method of making an article is also described, including providing a first microfiltration membrane layer having a first major surface and a second major surface disposed opposite the first major surface, and forming a first silica layer on the first major surface.

Abstract: Articles are described including a first microfiltration membrane layer having a first major surface and a second major surface disposed opposite the first major surface, and a first silica layer directly attached to the first major surface of the first microfiltration membrane layer. The first silica layer includes a polymeric binder and acid-sintered interconnected silica nanoparticles arranged to form a continuous three-dimensional porous network. A method of making an article is also described, including providing a first microfiltration membrane layer having a first major surface and a second major surface disposed opposite the first major surface, and forming a first silica layer on the first major surface.

Abstract: Microporous materials including a melt-processable, semi-crystalline, thermoplastic (co)polymer, wherein the thermoplastic (co)polymer is miscible in a compatible liquid when heated above a melting temperature of the semi-crystalline thermoplastic (co)polymer, further wherein the microporous material is comprised of a plurality of filaments substantially aligned in a first longitudinal direction, and a mesh extending laterally between the filaments, the mesh comprising a network of interconnected pores having a median diameter less than one micrometer. Methods of making and using such microporous materials (e.g. as films, membranes, battery separators, capacitor separators, fluid filtration articles, separation articles, and the like) are also described.

Abstract: This invention provides a device and method for detecting a type of a fan. The device for detecting a type of a fan includes a detector and a voltage controller. The detector is used for detecting and comparing a control voltage with a reference voltage to generate a comparison signal and transmitting the comparison signal to the voltage controller. The voltage controller outputs a variable voltage or a constant voltage to a voltage input terminal of a fan according to the comparison signal. The voltage controller can include an integrator for integrating a modulation signal and outputting the variable voltage.

Abstract: This invention provides a device and method for detecting a type of a fan. The device for detecting a type of a fan includes a detector and a voltage controller. The detector is used for detecting and comparing a control voltage with a reference voltage to generate a comparison signal and transmitting the comparison signal to the voltage controller. The voltage controller outputs a variable voltage or a constant voltage to a voltage input terminal of a fan according to the comparison signal. The voltage controller can include an integrator for integrating a modulation signal and outputting the variable voltage.