Abstract: A packaging material according to the present invention comprises a polyhydroxyalkanoate (PHA) resin, which has excellent biodegradability and thermal adhesiveness, in an inner layer, and can also provide a security function due to having a light-shielding layer laminated on the rear surface. Accordingly, the biodegradable packaging material according to the present invention is manufactured as a security pack for a mobile device having a camera, and can be utilized in facilities or by organizations in which security must be maintained to prevent various exhibits, experimental equipment, documents, and the like from being leaked to the outside.

Abstract: The bio-degradable foam prepared from a composition comprising a polyhydroxyalkanoate (PHA) resin of which crystallinity is controlled can be biodegraded even in the ocean while having excellent physical properties, thermal property and processability, and can be effectively prepared by means of supercritical carbon dioxide foaming and the like.

Abstract: The present invention provides a biodegradable multilayer film, a manufacturing method therefor, and an eco-friendly packaging material containing same, the biodegradable multilayer film comprising a base layer and a biodegradable resin layer, wherein the biodegradable resin layer includes a polyhydroxyalkanoate (PHA) resin, and the thermal bonding strength of the biodegradable resin layer is 0.5 kgf/15 mm to 15 kgf/15 mm, the water permeability is 3 g/m2·atm·day or less, and the oxygen permeability is 10 cc/m2·atm·day or less. The biodegradable multilayer film can be biodegraded in natural conditions such as in soil and in the ocean, can improve barrier properties against moisture and oxygen without including aluminum or nylon materials, and can further improve adhesive properties. As such, the biodegradable multilayer film can be used as a packaging material in various fields such that a high-quality and eco-friendly packaging material is provided.

Abstract: The present invention relates to a putrescine-producing microorganism and a method for producing putrescine using the same. To be more specific, the present invention is directed to a microorganism given the ability to produce putrescine which is generated by blocking a biosynthetic pathway from ornithine to arginine, increasing the intracellular level of glutamate, enhancing the biosynthetic pathway of ornithine from glutamate, and introducing extracellular ornithine decarboxylase; and a method for producing putrescine by using the microorganism.

Abstract: The present invention provides methods for the production of cysteine or derivates thereof by culturing a microorganism having reduced activity of endogenous phosphoserine phosphatase and the activity of PhnC, PhnD, and PhnE is reduced, and enhanced activity of phosphoglycerate dehydrogenase and/or phosphoserine aminotransferase. The O-phosphoserine produced by such an organism can then be reacted with a sulfide in the presence of a sulfydrylase or a microorganism expressing a sulfhydrylase to produce cysteine or a derivative thereof. Microorganisms having these reduced and enhanced properties noted above are also provided herein.

Abstract: The present invention relates to a microorganism having an improved ornithine-producing ability, in which the biosynthetic pathway of arginine form ornithine is blocked, the intracellular glutamate level is increased, and the biosynthetic pathway of ornithine from glutamate is enhanced, and a method for producing ornithine using the microorganism.

Abstract: The present invention relates to avirulent Salmonella Gallinarum variants by inactivating virulence gene clusters of Salmonella Gallinarum (SG), a main pathogen of avian salmonellosis, and various uses thereof notably in the production of Salmonella-specific lytic bacteriophages, pharmaceutical compositions and feed additives.

Abstract: Disclosed is an O-phosphoserine sulfhydrylase (OPSS) mutant which has a Mycobacterium smegmatis-derived amino acid sequence corresponding to that of SEQ ID NO: 1 which is devoid of three to seven C-terminal amino acid residues. Also, a nucleic acid molecule encoding the OPSS mutant, an expression vector carrying the nucleic acid molecule, and a transformant transformed with the expression vector are disclosed. In addition, a method is provided for producing cysteine in which O-phospho-L-serine (OPS) is reacted with a sulfide in the presence of the OPSS mutant. The OPSS mutant has improved enzymatic activity and can be applied to the environmentally friendly production of L-cysteine through a simple enzymatic conversion reaction.

Abstract: The present invention relates to a method for separating and purifying 1,4-diaminobutane at high purity and high yield from a fermented solution comprising 1,4-diaminobutane, through cell mass removement, desalination, concentration, impurities removal, and recovery. Also, provided is a method for separating and purifying 1,4-diaminobutane at high purity and high yield from a fermented solution 1,4-diaminobutane, through cell mass removement, desalination, low-temperature concentration, crystallization, filtration, high-temperature concentration and distillation.

Abstract: Disclosed herein is a novel bacteriophage which has specific bactericidal activity against one or more Salmonella bacteria selected from the group consisting of Salmonella enteritidis, Salmonella typhimurium, Salmonella gallinarum, and Salmonella pullorum without affecting beneficial bacteria, in addition to showing excellent tolerance to acid, heat and desiccation. The novel bacteriophage of the present invention can be widely used as an active ingredient for therapeutic agents, animal feeds or drinking water, cleaners and sanitizers for preventing and treating the infectious diseases caused by Salmonella enteritidis, Salmonella typhimurium, Salmonella gallinarum or Salmonella pullorum including salmonellosis, Salmonella food poisoning, Fowl Typhoid, and Pullorum disease or for controlling the Salmonella bacteria.

Abstract: The present invention relates to a method for separating and purifying 1,4-diaminobutane at high purity and high yield from a fermented solution comprising 1,4-diaminobutane, through cell mass removement, desalination, concentration, impurities removal, and recovery. Also, provided is a method for separating and purifying 1,4-diaminobutane at high purity and high yield from a fermented solution 1,4-diaminobutane, through cell mass removement, desalination, low-temperature concentration, crystallization, filtration, high-temperature concentration and distillation.

Abstract: The present invention relates to a novel bacteriophage, more particularly, a bacteriophage that has a specific bactericidal activity against Salmonella typhimurium, Salmonella gallinarum, or Salmonella pullorum, a composition for the prevention or treatment of infectious diseases including salmonellosis and Salmonella food poisoning caused by Salmonella typhimurium, Fowl typhoid caused by Salmonella gallinarum, and Pullorum disease caused by Salmonella pullorum, which comprises the bacteriophage as an active ingredient, and an animal feed, drinking water, cleaner, and sanitizer which comprise the bacteriophage as an active ingredient. The present invention also provides important insights into prevention and control strategies against Salmonella infection and suggests that the use of bacteriophage can be a novel, safe, and effectively plausible alternative to antibiotics for the prevention of Salmonella infection in poultry.

Abstract: Disclosed herein is a novel bacteriophage which has specific bactericidal activity against one or more Salmonella bacteria selected from the group consisting of Salmonella enteritidis, Salmonella typhimurium, Salmonella gallinarum, and Salmonella pullorum without affecting beneficial bacteria, in addition to showing excellent tolerance to acid, heat and desiccation. The novel bacteriophage of the present invention can be widely used as an active ingredient for therapeutic agents, animal feeds or drinking water, cleaners and sanitizers for preventing and treating the infectious diseases caused by Salmonella enteritidis, Salmonella typhimurium, Salmonella gallinarum or Salmonella pullorum including salmonellosis, Salmonella food poisoning, Fowl Typhoid, and Pullorum disease or for controlling the Salmonella bacteria.

Abstract: The present invention relates to a putrescine-producing microorganism and a method for producing putrescine using the same. To be more specific, the present invention is directed to a microorganism given the ability to produce putrescine which is generated by blocking a biosynthetic pathway from ornithine to arginine, increasing the intracellular level of glutamate, enhancing the biosynthetic pathway of ornithine from glutamate, and introducing extracellular ornithine decarboxylase; and a method for producing putrescine by using the microorganism.

Abstract: The present invention relates to a microorganism having an improved ornithine-producing ability, in which the biosynthetic pathway of arginine form ornithine is blocked, the intracellular glutamate level is increased, and the biosynthetic pathway of ornithine from glutamate is enhanced, and a method for producing ornithine using the microorganism.

Abstract: The present invention relates to a novel bacteriophage, more particularly, a bacteriophage that has a specific bactericidal activity against Salmonella enteritidis, Salmonella typhimurium, Salmonella gallinarum and Salmonella pullorum, a composition for the prevention or treatment of infectious diseases including salmonellosis and Salmonella food poisoning caused by Salmonella enteritidis or Salmonella typhimurium, Fowl typhoid caused by Salmonella gallinarum, and Pullorum disease caused by Salmonella pullorum, which comprises the bacteriophage as an active ingredient, and an animal feed, drinking water, cleaner, and sanitizer which comprise the bacteriophage as an active ingredient.

Abstract: The present invention relates to avirulent Salmonella Gallinarum variants by inactivating virulence gene clusters of Salmonella Gallinarum (SG), a main pathogen of avian salmonellosis, and various uses thereof notably in the production of Salmonella-specific lytic bacteriophages, pharmaceutical compositions and feed additives.

Abstract: An L-threonine-producing Escherichia coli in which a promoter of a phosphoenolpyruvate carboxylase (ppc) gene on the chromosome is substituted with a promoter of a cysteine synthase (cysK) gene and a method of producing L-threonine by using the same are disclosed. The recombinant Escherichia coli may produce L-threonine in a high yield, and thus may be widely used in medical, pharmaceutical, and feed industries, particularly for an animal feed.

Abstract: The present invention relates to avirulent Salmonella gallinarum variants by inactivating virulence gene clusters of Salmonella gallinarum (SG), a main pathogen of avian salmonellosis, and various uses thereof notably in the production of Salmonella-specific lytic bacteriophages, pharmaceutical compositions and feed additives.

Abstract: An L-threonine-producing Escherichia coli in which a promoter of a phosphoenolpyruvate carboxylase (ppc) gene on the chromosome is substituted with a promoter of a cysteine synthase (cysK) gene and a method of producing L-threonine by using the same are disclosed. The recombinant Escherichia coli may produce L-threonine in a high yield, and thus may be widely used in medical, pharmaceutical, and feed industries, particularly for an animal feed.