Abstract: The present invention is to connect group calling with an external system, and output voices from the external system to group calling, and input voices from the group calling to an external system while making group calling without the sense of incompatibility. In the group calling system 1 that makes group calling with a plurality of terminals, a daemon server 200 always receives voice data from a voice server 220 or an external system 330 that transmits or receives voices to and from a user terminal 50, and changes the received voice data into data in a predetermined format. The voice data in the changed format is transmitted to the external system 300 when the voice data is received from the voice server 220 and to the voice server 220 to output the voice data to the terminal 50 when the voice data is received from the external system 300.

Abstract: [Problems] To provide a novel hydrophilized separation membrane for use in the treatment of a liquid, which comprises an aromatic ether polymer, is less likely to be degraded by sterilization with a high energy ray and has a controlled pore size and a high water permeability. [Means for Solving Problems] A porous separation membrane for use in the treatment of a liquid which is produced by a wet film formation process using an aromatic ether polymer and a hydrophilizing agent. The separation membrane can be used for medical purposes or in a pharmaceutical of food.

Abstract: It is intended to provide a polymer for coating a leukocyte removal filter material which is excellent in the capability of removing leukocytes. It is further intended to provide a filter whereby both of leukocytes and platelets can be highly efficiently removed from a blood product containing leukocytes and platelets. The above objects can be achieved by using a polymer for coating a leukocyte removal filter material which comprises a unit originating in a hydrophobic polymerizable monomer, a unit originating in a polymerizable monomer containing a basic nitrogen-containing part, and a unit originating in a polymerizable monomer containing a protonic neutral hydrophilic part.

Abstract: [Problems] To provide a novel hydrophilized separation membrane for use in the treatment of a liquid, which comprises an aromatic ether polymer, is less likely to be degraded by sterilization with a high energy ray and has a controlled pore size and a high water permeability. [Means for Solving Problems] A porous separation membrane for use in the treatment of a liquid which is produced by a wet film formation process using an aromatic ether polymer and a hydrophilizing agent. The separation membrane can be used for medical purposes or in a pharmaceutical of food.

Abstract: It is intended to provide a filter for selectively removing leukocytes whereby leukocytes can be selectively and efficiently removed without worsening in the performance due to sterilization while causing little elution and minimizing loss in platelets. Namely, a filter for selectively removing leukocytes which is highly tolerant to sterilization and contains a polymer on the filter surface, characterized in that the polymer consists of a hydroxyalkyl (meth)acrylate unit having 3 or 4 carbon atoms in the alkyl moiety, a monomer unit having a basic nitrogen-containing functional group, and a monomer unit having an ethylene oxide chain with a repetition number of 2 to 9, the content of the monomer unit having the basic nitrogen-containing functional group ranges from 2% by mol to 9% by mol in the polymer, and the ethylene oxide chain content ranges from 1% by weight to 10% by weight in the polymer.

Abstract: A filter for selectively removing leukocytes from the human whole blood, characterized in that it comprises a filter base coated with a hydrophilic synthetic polymer having a weight-average molecular weight of 300,000 to 3,000,000 and that the percentage of covering by the polymer is 70% or higher based on the whole surface of the filter base.

Abstract: It is intended to provide a filter for selectively removing leukocytes whereby leukocytes can be selectively and efficiently removed without worsening in the performance due to sterilization while causing little elution and minimizing loss in platelets. Namely, a filter for selectively removing leukocytes which is highly tolerant to sterilization and contains a polymer on the filter surface, characterized in that the polymer consists of a hydroxyalkyl (meth)acrylate unit having 3 or 4 carbon atoms in the alkyl moiety, a monomer unit having a basic nitrogen-containing functional group, and a monomer unit having an ethylene oxide chain with a repetition number of 2 to 9, the content of the monomer unit having the basic nitrogen-containing functional group ranges from 2% by mol to 9% by mol in the polymer, and the ethylene oxide chain content ranges from 1% by weight to 10% byweight in the polymer.

Abstract: It is intended to provide a polymer for coating a leukocyte removal filter material which is excellent in the capability of removing leukocytes. It is further intended to provide a filter whereby both of leukocytes and platelets can be highly efficiently removed from a blood product containing leukocytes and platelets. The above objects can be achieved by using a polymer for coating a leukocyte removal filter material which comprises a unit originating in a hydrophobic polymerizable monomer, a unit originating in a polymerizable monomer containing a basic nitrogen-containing part, and a unit originating in a polymerizable monomer containing a protonic neutral hydrophilic part.