Abstract: Provided is a method for preparing a block copolymer including a step of subjecting a lactide monomer to ring-opening polymerization in the presence of a biosynthesized poly(3-hydroxypropionate) initiator to prepare a polylactide-poly(3-hydroxypropionate) block copolymer.

Abstract: Disclosed is a polyethylene yarn capable of providing a user with a soft tactile sensation as well as a cooling feeling or a cooling sensation, and also having improved weavability that enables the manufacture of a skin cooling fabrics having excellent pilling resistance, abrasion resistance, cuttability, and sewability, a method for manufacturing the same, and a skin cooling fabric including the same. In a strength-elongation curve of the polyethylene yarn obtained by measuring at ambient temperature, (i) elongation at strength of 1 g/d is 0.5 to 3%, (ii) elongation at strength of 3 g/d is 5.5 to 10%, and (iii) a difference between elongation at strength of 4 g/d and elongation at maximum strength is 5.5 to 25%, and the polyethylene yarn has toughness of 55 to 120 J/m3 at ambient temperature.

Abstract: An electrode assembly for a secondary battery includes positive and negative electrode plates and a separator therebetween. Each of the electrode plates includes: an electrode current collector plate and having an electrode active material layer on a surface of the electrode current collector plate and at least one uncoated portion at where no electrode active material is applied; and a plurality of electrode tabs electrically attached and coupled to the uncoated portions. The positive electrode tabs protrude upwardly from an upper portion of the electrode assembly, and the negative electrode tabs protrude downwardly from a lower portion of the electrode assembly.

Abstract: A secondary battery includes an electrode assembly in which a negative electrode plate, a separator, and a positive electrode plate are laminated and wound; and an exterior material accommodating the electrode assembly, wherein the positive electrode plate includes a conductive base material layer having first and second surfaces, the second surface being an opposite surface of the first surface, a first functional layer on the first surface of the conductive base material layer, a first electrically active material layer on the first functional layer, a first insulating layer on the first surface of the conductive base material layer, the first insulating layer being spaced apart from the first functional layer and the first electrically active material layer, and a first lamination tape covering a part of the first functional layer, the first electrically active material layer, the first insulating layer, and the first surface of the conductive base material layer.

Abstract: An electrode assembly for a battery includes: a positive electrode plate including a positive electrode current collector plate, a positive electrode active material layer on a surface of the plate, at least one uncoated portion at which no positive electrode active material is applied, and at least one positive electrode tab electrically attached and coupled to the uncoated portion, and protruding upwardly from an upper portion of the electrode assembly; a negative electrode plate including a negative electrode current collector plate, a negative electrode active material layer on a surface of the plate, at least one uncoated portion in which no negative electrode active material is applied, at least one negative electrode tab electrically attached and coupled to the uncoated portion, and protruding downwardly from a lower portion of the electrode assembly; and a separator between the positive electrode plate and the negative electrode plate.

Abstract: The present disclosure relates to a pressure swing adsorption apparatus for high purity hydrogen purification from ammonia decomposition and a hydrogen purification method using the same, and more specifically, the pressure swing adsorption apparatus includes a plurality of adsorption towers including a guard bed unit and a hydrogen purification unit, in which each adsorption tower is packed with different adsorbents, to purify high purity hydrogen from mixed hydrogen gas produced after ammonia decomposition, make it easy to replace the adsorbent for ammonia removal, minimize the likelihood that the lifetime of the adsorbent in the hydrogen purification unit is drastically reduced by trace amounts of ammonia, efficiently recover hydrogen of the guard bed unit, thereby maximizing the hydrogen recovery rate compared to a conventional pressure swing adsorption process including a pretreatment unit and a hydrogen purification unit, and respond to a large change in ammonia concentration in the raw material.

Abstract: The present specification pertains to a microorganism and/or Escherichia coli and a use thereof, wherein the microorganism and/or Escherichia coli has 3-hydroxypropionic acid or 3-hydroxypropionate (3-HP) production ability, with a foreign 3-HP production gene inserted into the genomic DNA thereof, and has a use of measuring the production ability of the inserted 3-HP production gene.

Abstract: In a high pressure gas charging system and method, the system includes a charging container, a fluid supply part and a high pressure charging part. A high pressure gas is charged in the charging container. The fluid supply part is connected to a first side of the charging container, and is configured to supply incompressible fluid into the charging container before charging the high pressure gas. The high pressure charging part is connected to a second side of the charging container, and is configured to charge the high pressure gas into the charging container in which the incompressible fluid is already supplied. The incompressible fluid is supplied to the charging container until an inner pressure of the charging container reaches a predetermined pressure, and the incompressible fluid is removed to outside through the fluid supply part as the high pressure gas is charged into the charging container.

Abstract: An air inlet assembly for circulating air in a receiving space for receiving laundry, and a laundry treatment apparatus including the same are provided. An air inlet assembly according to an aspect of the present disclosure includes a cover mounted on an air suction part, wherein the air suction part includes a through-hole formed in a portion thereof. The cover includes a base plate configured to cover the air suction part when viewed in a plan view, by forming a portion corresponding to the through-hole as an opened plate shape, an outer wall configured to continuously protrude along the periphery of the base plate, and a rib configured to protrude from an inner portion spaced apart from the outer wall so as to form a water discharge channel in a space between the outer wall and the rib, wherein the water discharge channel extends to the through-hole.

Abstract: A battery control system may comprise: a temperature measuring device for measuring a temperature of a first battery cell disposed at a first point among a plurality of battery cells included in a battery assembly and a temperature of a second battery cell disposed at a second point among the plurality of battery cells, wherein the second point being spaced apart from the first point; and a controller for monitoring the temperature of the first battery cell and the temperature of the second battery cell and performing a predefined control operation for preventing state degradation due to temperature imbalance among the battery cells based on at least one of the temperature of the first battery cell and the temperature of the second battery cell.

Abstract: An apparatus that communicates with a screen printer and a solder inspection device is disclosed. The apparatus according to the present disclosure may include a process that is configured to: obtain first information associated with each of a plurality of pads on the substrate; obtain second information associated with each piece of the solder paste applied to each of the plurality of pads from the solder inspection device; determine a position correction value for the stencil mask with respect to the substrate based on the first information and the second information; and deliver the position correction value to the screen printer.

Abstract: A secondary battery includes: an electrode assembly including a negative electrode plate, a positive electrode plate, and a separator between the negative electrode plate and the positive electrode plate; and a case accommodating the electrode assembly. The electrode assembly includes an adhesive part on an outermost region of the electrode assembly. The adhesive part is arranged to cover a boundary line between the negative electrode plate and the separator or between the positive electrode plate and the separator, and is bonded to the case.

Abstract: The present invention relates to a battery protection method and system, and relates to a method of classifying protection operations based on the possibility of occurrence of safety issues such as ignition/heating, and additionally implementing protection algorithms corresponding to each while maintaining the existing protection operation/release condition, and relates to a method and system for protecting a battery in a way to prevent safety issues in advance by permanently blocking battery operation if the over voltage of the battery bank continues to occur even after the first action before reaching the cell unbalance protection operation condition, check whether an over voltage occurs in a specific battery bank, and take the primary measures to prevent overcharge of the battery bank.

Abstract: Provided is a microorganism having the capability of producing 3-hydroxypropionic acid from glucose and a method for producing 3-hydroxypropionic acid from glucose by using the microorganism. The microorganism can include a mutation adapted to utilize intracellularly introduced glucose in 3HP production rather than cell growth, and thus increases in 3HP productivity (3HP production capacity) can be achieved. Also provided is a method that can increase 3HP production yield by controlling the time of adding an inducer and/or kinds of an alkaline aqueous solution during culturing.

Abstract: Provided is a two-step production method for 3-HP, comprising: a first step of culturing cells at a high concentration; and a second step of producing 3-HP using the high concentration-cultured cells as a catalyst, in which during the two-step culture, the energy and/or coenzyme balance are adjusted to produce 3-HP and/or improve the productivity of 3-HP. The productivity and yield of 3-HP can be improved.

Abstract: Provided is a lactic acid-based block copolymer which is biodegradable while having excellent mechanical properties.

Abstract: An electronic device according to an embodiment may comprise: a housing including a first slit having a length corresponding to a first frequency and a second slit extending from one point of the first slit in a different direction from the first slit and having a length corresponding to a second frequency, and configured to resonate at the first frequency and the second frequency by the first slit and the second slit; a printed circuit board disposed in the housing and at least partially made of a non-conductive material in regions corresponding to the first slit and the second slit; and a power supply unit for supplying power through one point of the housing, adjacent to the first slit or the second slit. Various other embodiments recognized from the specification are also possible.