Abstract: The present invention relates to a fuel cell system capable of adjusting a bypass flow rate, in which the bypass flow rate can be automatically adjusted according to the temperature of an exhaust gas discharged from a fuel cell stack. The fuel cell system capable of adjusting a bypass flow rate, according to an embodiment of the present invention, comprises: an exhaust gas inlet flow path; an exhaust gas discharge flow path; a bypass flow path for bypassing a membrane humidifier to allow at least a portion of an exhaust gas discharged from a fuel cell stack to flow to the exhaust gas discharge flow path; and a bypass flow rate control unit that is formed in the bypass flow path and adjusts the opening degree of the bypass flow path according to the temperature of the exhaust gas discharged from the fuel cell stack.

Abstract: The present invention relates to a fuel cell humidifier which can prevent condensate water from entering a running fuel cell stack. A fuel cell humidifier according to an embodiment of the present invention comprises: a humidification module; a first cap having an air discharge port for supplying air humidified by the humidification; a second cap having an air inlet port for receiving the air supplied from the outside; a bypass tube for transferring condensate water, which is generated in the interior space of the first cap or flows into the interior space of the first cap from the hollow fiber membranes, to the interior space of the housing where the off-gas flows; and a condensation inducing part extending from the air discharge port to expand the humidified air so as to induce condensation of condensate water while slowing down the speed thereof.

Abstract: The present invention relates to a membrane humidifier for a fuel cell, which can prevent a decrease in humidification efficiency, caused by a pressure difference between the inside and the outside of the membrane humidifier. The membrane humidifier for a fuel cell, according to an embodiment of the present invention, comprises: a middle case having a module insertion part formed therein; a cap case coupled to the middle case; a hollow fiber membrane module inserted in the module insertion part; and an active pressure buffer part formed between the middle case and the module insertion part to prevent expansion of the module insertion part due to a pressure difference between the inside and the outside of the middle case or relieve the pressure difference according to output states of the fuel cell.

Abstract: The present invention relates to a fuel cell membrane humidifier capable of preventing a humidification efficiency decrease caused by the pressure difference between the inside and the outside of the membrane humidifier. The fuel cell membrane humidifier according to an embodiment of the present invention comprises: a middle case in which a module insertion part, including an outer partition wall formed spaced apart from an inner wall of the middle case, is formed; a cap case coupled to the middle case; a hollow fiber membrane module inserted into the module insertion part; and an active pressure buffer part that is formed between the middle case and the module insertion part and prevents the module insertion part from expanding due to the pressure difference between the inside and the outside of the middle case, or resolves the pressure difference, according to the output status of the fuel cell.

Abstract: A semiconductor device includes first and second substrates connected to each other. The second substrate includes a plate layer having first and second faces. Gate electrode layers are disposed on the first face of the plate layer. Channel structures extend through the gate electrode layers. Word-line cutting structures extend through the gate electrode layers and are spaced apart from each other. Via structures are disposed on the second face of the plate layer. Via connecting structures are disposed on the top face of the via structures. A width of the bottom face of each of the via structures is greater than a width of the top face of each of the via structures. A width of the bottom face of each of the via connecting structures is less than a width of the top face of each of the via connecting structures.

Abstract: The present invention relates to a heteroaryl derivative compound and a use thereof. Since the heteroaryl derivative of the present invention exhibits excellent inhibitory activity against EGFR, the heteroaryl derivative can be usefully used as a therapeutic agent for EGFR-associated diseases.

Abstract: The present invention relates to a fuel cell membrane humidifier which adjusts a clearance between hollow fiber membranes according to a temperature of a fluid flowing between the hollow fiber membranes to improve humidification efficiency. A fuel cell membrane humidifier according to an embodiment of the present invention comprises: a mid-case; a cap fastened to the mid-case; a plurality of hollow fiber membranes disposed in the mid-case and exchanging moisture with an air supplied from the outside and flue gas introduced from a fuel cell stack to humidify the air; and a clearance adjustment pipe disposed between the plurality of hollow fiber membranes and formed of a material having a thermal expansion coefficient different from that of the plurality of hollow fiber membranes, so as to adjust the clearance between the plurality of hollow fiber membranes according to a temperature of flue gas.

Abstract: Provided is a method of differentiating a pluripotent stem cell-derived hemogenic endothelial cell into a lymphoid lineage blood cell, enabling a hemogenic endothelial cell to be cultured for a long period of time so as to be induced into a lymphoid lineage blood cell, thereby facilitating induction of generation of immune cells such as T cells, B cells, and NK cells.

Abstract: The present invention relates to a hollow fiber membrane including, sequentially from the center: a first layer having a high-density sponge structure including pores with a size of 1 nm or less; a second layer including a finger-shaped structure; and a third layer having a low-density sponge structure including pores with a size of 10 to 1,000 ?m, and to a method for producing the hollow fiber membrane.

Abstract: The present invention relates to a fuel cell membrane humidifier which can actively control the flow rate of exhaust gas flowing from a fuel cell stack according to the output condition of a fuel cell. A fuel cell membrane humidifier according to one embodiment of the present invention comprises: a mid-case having an inlet through which wetting gas supplied from the fuel cell stack is introduced and an outlet through which the wetting gas is discharged; a cartridge disposed inside the mid-case and accommodating a plurality of hollow fiber membranes; a bypass space formed in the space between the mid-case and the cartridge; and an active blocking member for controlling the degree of opening of the bypass space according to the temperature of the wetting gas introduced through the inlet.

Abstract: The present disclosure relates to a L-glutamic acid-producing recombinant microorganism comprising a SbtA protein or a polynucleotide encoding the SbtA protein, and to a method for producing L-glutamic acid by using the same.

Abstract: An aspect provides a method of increasing efficiency of somatic cell nuclear transfer using a substance (RS-1) increasing Rad51 activity, and a somatic cell nuclear transfer cell prepared according to the method. Another aspect provides a method of screening for a substance increasing Rad51 activity to increase efficiency of somatic cell nuclear transfer. When the substance increasing Rad51 activity is used, efficiency of somatic cell nuclear transfer may be increased.

Abstract: The present invention relates to a use of 3,6-anhydro-L-galactose for preventing dental caries. More specifically, 3,6-anhydro-L-galactose inhibits the growth of oral microorganisms and exhibits anti-caries activity to inhibit the production of acids caused by the consumption of a carbon source by the oral microorganisms. Thus, 3,6-anhydro-L-galactose can be used in pharmaceuticals, food products, oral hygiene preparations, etc. for preventing, ameliorating or treating oral diseases caused by oral microorganisms, such as dental caries, gingivitis, periodontitis, oral mucosal ulcer, halitosis or xerostomia.

Abstract: A composite hollow fiber membrane having improved water permeability and peel strength and a manufacturing method thereof are disclosed. The composite hollow fiber membrane includes a tubular polymer membrane having an outer surface and an inner surface, and a tubular braid disposed between the outer surface and the inner surface of the tubular polymer membrane, the tubular braid comprises a plurality of yarns, each of the yarns includes first multifilaments and second multifilaments, each of the first multifilaments includes a plurality of first monofilaments having fineness of 3 to 50 denier, and each of the second multifilaments includes a plurality of second monofilaments having fineness of 0.4 to 3 denier.

Abstract: Disclosed are an extendable pressurized-type hollow fiber membrane module which facilitates improvement of filtrate quality through a multistep-filtration, enhanced easiness of installation and maintenance, decrease of footprint, and/or enlargement of filtration apparatus (without causing decrease of permeate flux of a unit hollow fiber membrane), and a filtration apparatus manufactured using the same. The filtration apparatus of the present invention comprises first and second pressurized-type hollow fiber membrane modules, wherein an inlet port of the first pressurized-type hollow fiber membrane module for introducing feed water and an outlet port of the second pressurized-type hollow fiber membrane module for discharging filtrate or air are coupled to each other.

Abstract: An energy-saving filtering system and a hollow fiber membrane module for the same are disclosed. According to the filtering system of the present invention, pretreated feed water flows into the case of the hollow fiber membrane module by gravity, and the filtrate passing through the hollow fiber membrane is discharged from the hollow fiber membrane module by gravity.

Abstract: The present invention relates to a use of 3,6-anhydro-L-galactose for preventing dental caries. More specifically, 3,6-anhydro-L-galactose inhibits the growth of oral microorganisms and exhibits anti-caries activity to inhibit the production of acids caused by the consumption of a carbon source by the oral microorganisms. Thus, 3,6-anhydro-L-galactose can be used in pharmaceuticals, food products, oral hygiene preparations, etc. for preventing, ameliorating or treating oral diseases caused by oral microorganisms, such as dental caries, gingivitis, periodontitis, oral mucosal ulcer, halitosis or xerostomia.

Abstract: Disclosed are system and method for filtration which can minimize the contamination of the filtering membrane through a pretreatment and perform the pretreatment and the filtration with a filtering membrane in a single filtering unit so that any need for separate and additional space and facility for the pretreatment can be obviated. The system for filtration of the present invention comprises a fine bubble supplier for providing fine bubbles into the feed water. The pretreatment is performed by supplying the feed water to be treated into the filtering unit through a dynamic filtration layer which is formed in the filtering unit as the fine bubbles rise.

Abstract: Disclosed are an extendable pressurized-type hollow fiber membrane module which facilitates improvement of filtrate quality through a multistep-filtration, enhanced easiness of installation and maintenance, decrease of footprint, and/or enlargement of filtration apparatus (without causing decrease of permeate flux of a unit hollow fiber membrane), and a filtration apparatus manufactured using the same. The filtration apparatus of the present invention comprises first and second pressurized-type hollow fiber membrane modules, wherein an inlet port of the first pressurized-type hollow fiber membrane module for introducing feed water and an outlet port of the second pressurized-type hollow fiber membrane module for discharging filtrate or air are coupled to each other.

Abstract: Disclosed are a pressurized-type hollow fiber membrane module having a pressure resistance higher than 3 kgf/cm2 and a filtration system comprising the same. The pressurized-type hollow fiber membrane module comprises: a body case having an open end; a fixing member disposed in the body case at the open end; a hollow fiber membrane potted in the fixing member; and a cap on the open end of the body case, the cap and fixing member forming a filtrate-collecting space, wherein a lumen of the hollow fiber membrane is in fluid communication with the filtrate-collecting space, the fixing member has a step so that an upper side surface of the fixing member is not in contact with an inner surface of the body case, and a portion of the cap is inserted in a groove defined by the step of the fixing member and the inner surface of the body case.