Abstract: A large-scale fabrication technique for PIM-1 asymmetric membranes doped with low-molecular-weight polyethylene glycol for gas separation. Based on the membrane fabrication technique of dry/wet phase inversion, firstly, the coagulation process of casting solution is regulated by low-molecular-weight polyethylene glycol to thin the dense functional layer, to improve the hydrophilicity of the membrane structure, and to form mass transfer channels for the diffusion of polyethylene glycol into the dense functional layer. Then, directional migration and enrichment of polyethylene glycol are realized through capillary action induced by directional water evaporation for large-scale fabrication of PIM-1 asymmetric membranes doped with low-molecular-weight polyethylene glycol in the dense functional layer for gas separation, and thereafter high permeation ability and high selectivity are achieved simultaneously.

Abstract: An oxygen production system (100) may include a main control module (120) and a molecular sieve module (140). The molecular sieve module (140) may include a molecular sieve configured to separate oxygen from air and a molecular sieve information unit. The molecular sieve information unit may be configured to store information of the molecular sieve. The main control module (120) may be configured to read, write and/or update the information of the molecular sieve stored in the molecular sieve information unit. The oxygen production system (100) may occupy small space, have good performance and a high oxygen production efficiency, and enable a user to obtain a more user-friendly experience.

Abstract: An oxygen production system (100) may include a main control module (120) and a molecular sieve module (140). The molecular sieve module (140) may include a molecular sieve and a molecular sieve information unit. The molecular sieve information unit may be configured to store information of the molecular sieve. The main control module (120) may be configured to read, write and/or update the information of the molecular sieve stored in the molecular sieve information unit. When reading, in response to at least part of the information of the molecular sieve exceeding a preset range, the main control module (120) may control the oxygen production system (100) to perform a corresponding operation. The oxygen production system (100) may occupy small space, have good performance and a high oxygen production efficiency, and enable a user to obtain a more user-friendly experience.

Abstract: The present invention belongs to the field of alkaline polymer electrolyte membranes, and relates to a comb-shaped structure polybenzimidazole anion exchange membrane with high conductivity and preparation method thereof. In the invention, firstly, polybenzimidazole is grafted with the non-cationic side chains to the max grafting rate to synthesize the de-protonated comb-shaped polybenzimidazole material, avoiding the N—H in benzimidazole forms ionic binding with cationic functional groups, which will reduce the reactivity and mobility of cationic groups; then react de-protonated comb-shaped polybenzimidazole with quaternization reagent to attach the pendent side chain with cationic functional groups, making it easy to aggregate to form ion clusters and hydrophilic/hydrophobic microphase separation. The anion exchange membrane prepared in this invention has excellent conductivity, mechanical properties and alkaline stability.

Abstract: The present invention discloses a nucleic acids extraction system and method based on a 3D-printed microdevice, and belongs to the technical field of nucleic acids extraction. The nucleic acids extraction system is a monomer 3D-printed microdevice or a 3D-printed microdevice prepared by 3D printing technologies, the monomer 3D-printed microdevice comprises a nucleic acids binding region and a handle region, and the 3D-printed microdevice is composed of more than two monomer 3D-printed microdevices through a joining region; and the nucleic acids binding region is made of photosensitive resin or thermoplastic. An extraction method for the nucleic acids extraction system based on a 3D-printed microdevice is used to bind, clean and elute nucleic acids by moving the monomer 3D-printed microdevice or the 3D-printed microdevice among a solution containing target nucleic acids, a washing buffer and an elution buffer.

Abstract: An experiment system and method for accurate controlling of macromolecular crystallization process. The system has a platform-equipped horizontal moving slot and channel dedicated backwash module, a droplet adding control module, an observing module, a user observation computer system, and an experimental condition control module. A high-precision movement knob of the x-axis platform and the y-axis platform of the system and the accurate position control of a syringe needle are used to ensure that the macromolecular solution can be added into the correct positions of convex or concave. The crystallization induction period of the target crystal form is determined by the real-time data of the high-speed microcamera, and the crystal cultivation environment is adjusted in real time. This is simple and easy to operate, high in productivity, can be applied to the conventional experimental replication.

Abstract: An oxygen production system (100) may include a main control module (120) and a molecular sieve module (140). The molecular sieve module (140) may include a molecular sieve and a molecular sieve information unit. The molecular sieve information unit may be configured to store information of the molecular sieve. The main control module (120) may be configured to read, write and/or update the information of the molecular sieve stored in the molecular sieve information unit. When reading, in response to at least part of the information of the molecular sieve exceeding a preset range, the main control module (120) may control the oxygen production system (100) to perform a corresponding operation. The oxygen production system (100) may occupy small space, have good performance and a high oxygen production efficiency, and enable a user to obtain a more user-friendly experience.

Abstract: The present invention belongs to the field of alkaline polymer electrolyte membranes, and relates to a comb-shaped structure polybenzimidazole anion exchange membrane with high conductivity and preparation method thereof. In the invention, firstly, polybenzimidazole is grafted with the non-cationic side chains to the max grafting rate to synthesize the de-protonated comb-shaped polybenzimidazole material, avoiding the N—H in benzimidazole forms ionic binding with cationic functional groups, which will reduce the reactivity and mobility of cationic groups; then react de-protonated comb-shaped polybenzimidazole with quaternization reagent to attach the pendent side chain with cationic functional groups, making it easy to aggregate to form ion clusters and hydrophilic/hydrophobic microphase separation. The anion exchange membrane prepared in this invention has excellent conductivity, mechanical properties and alkaline stability.

Abstract: The present invention provides a continuous crystallization method under control of the multistage membrane modules, and belongs to the technical field of crystallization engineering. A crystallization solution is added to a crystallizer, and a stirring apparatus and a temperature control apparatus are started. After the system running stability, the loop of crystallization is started. Meanwhile, the coolant or antisolvent feed liquid loop is also started. The crystallization solution can respectively conduct crystal nucleation, growth and ripening in the multistage membrane modules, and then the crystallization solution is transported into a filter device and a drying apparatus to obtain the final crystal products. The desired crystal products can be obtained by the systematical control of the nucleation and crystal growth through the flow and the temperature of the crystallization solution, coolant or antisolvent feed liquid, and the contact time between two liquid phases.

Abstract: The present invention provides a continuous crystallization method under control of the multistage membrane modules, and belongs to the technical field of crystallization engineering. A crystallization solution is added to a crystallizer, and a stirring apparatus and a temperature control apparatus are started. After the system running stability, the loop of crystallization is started. Meanwhile, the coolant or antisolvent feed liquid loop is also started. The crystallization solution can respectively conduct crystal nucleation, growth and ripening in the multistage membrane modules, and then the crystallization solution is transported into a filter device and a drying apparatus to obtain the final crystal products. The desired crystal products can be obtained by the systematical control of the nucleation and crystal growth through the flow and the temperature of the crystallization solution, coolant or antisolvent feed liquid, and the contact time between two liquid phases.

Abstract: An experiment system and method for accurate controlling of macromolecular crystallization process. The system has a platform-equipped horizontal moving slot and channel dedicated backwash module, a droplet adding control module, an observing module, a user observation computer system, and an experimental condition control module. A high-precision movement knob of the x-axis platform and the y-axis platform of the system and the accurate position control of a syringe needle are used to ensure that the macromolecular solution can be added into the correct positions of convex or concave. The crystallization induction period of the target crystal faun is determined by the real-time data of the high-speed microcamera, and the crystal cultivation environment is adjusted in real time. This is simple and easy to operate, high in productivity, can be applied to the conventional experimental replication.

Abstract: A lighter having a housing that contains a fluid reservoir and an ignition member; an actuation switch that is disposed on the housing; and a nozzle assembly that includes a nozzle head and a flexible support tube that supports the nozzle head at its distal end. The flexible support tube extends from the housing through a housing port. The flexible support tube has a nested position in which it is disposed within the housing and an extended position in which the flexible support tube extends from the housing through the port enabling the flexible support tube to be bent in multiple directions for directing the nozzle head.

Abstract: The present invention provides novel radioimaging probes for use in combination with clinical radioimaging techniques for the visualization of specific tissues or regions of the body. These probes can be packaged into a blood-borne delivery vehicle for targeted delivery to these specific tissues or regions. This invention further provides for the use of synthetic microemulsions or chemically modified human low-density lipoprotein (LDL), such as acetylated LDL (AcLDL), as delivery vehicles to target the radioimaging probes specifically to tissues or regions that contain high concentrations of LDL receptors.