Patent application number | Description | Published |
20110053252 | MICROORGANISM PRODUCING O-ACETYL-HOMOSERINE AND THE METHOD OF PRODUCING O-ACETYL-HOMOSERINE USING THE MICROORGANISM - Disclosed herein are a microorganism strain capable of producing the L-methionine precursor O-acetyl homoserine in high yield and a method of producing O-acetyl homoserine using the same. The microorganism strain is a strain of | 03-03-2011 |
20110053253 | MICROORGANISM PRODUCING O-ACETYL-HOMOSERINE AND THE METHOD OF PRODUCING O-ACETYL-HOMOSERINE USING THE MICROORGANISM - Disclosed is a strain of | 03-03-2011 |
20110207304 | Method of Fabricating Semiconductor Devices - Methods of fabricating a semiconductor device include alternatingly and repeatedly stacking sacrificial layers and first insulating layers on a substrate, forming an opening penetrating the sacrificial layers and the first insulating layers, and forming a spacer on a sidewall of the opening, wherein a bottom surface of the opening is free of the spacer. A semiconductor layer is formed in the opening. Related devices are also disclosed. | 08-25-2011 |
20110316064 | Semiconductor Memory Devices And Methods Of Forming The Same - Semiconductor devices and methods of forming the same may be provided. The semiconductor devices may include gate patterns and insulation patterns repeatedly and alternatingly stacked on a substrate. The semiconductor devices may also include a through region penetrating the gate patterns and the insulation patterns. The semiconductor devices may further include a channel structure extending from the substrate through the through region. The channel structure may include a first channel pattern having a first shape. The first channel pattern may include a first semiconductor region on a sidewall of a portion of the through region, and a buried pattern dividing the first semiconductor region. The channel structure may also include a second channel pattern having a second shape. The second channel pattern may include a second semiconductor region in the through region. A grain size of the second semiconductor region may be larger than that of the first semiconductor region. | 12-29-2011 |
20120068242 | SEMICONDUCTOR DEVICES AND METHODS OF FABRICATING THE SAME - A semiconductor device includes horizontal patterns on a substrate and the horizontal patterns have at least one opening therein, a pad pattern in an upper region of the opening, an insulating gap fill structure in the opening, the insulating gap fill structure is between the pad pattern and the substrate, and the insulating gap fill structure includes a first gap fill pattern and a second gap fill pattern. The first gap fill pattern includes a first oxide and the second gap fill pattern includes a second oxide, and the second oxide has a different etching selectivity from that of the first oxide. The device further includes a semiconductor pattern that is between a sidewall of the gap fill structure and sidewalls of the horizontal patterns and between a sidewall of the pad pattern and the sidewalls of the horizontal patterns. | 03-22-2012 |
20120123158 | Method for Increasing Methionine Productivity Using a Mixture of Methyl Mercaptan and Dimethyl Sulfide - The present invention relates to a method for increasing L-methionine productivity and organic acid productivity. More particularly, the present invention relates to a method which involves adding a mixture containing methyl mercaptan and dimethyl sulfide at a appropriate ratio to O-acetyl homoserine or O-succinyl homoserine and to an enzyme having an activity of converting methionine precursor into L-methionine, so as to perform an enzyme reaction, to thereby improve the conversion rate of L-methionine and organic acid from the L-methionine precursor, and thus increasing L-methionine yield as compared to conventional method. | 05-17-2012 |
20130273614 | NOVEL O-ACETYLHOMOSERINE SULFHYDRYLASE OR MUTANT PROTEIN THEREOF, AND METHOD FOR CONVERTING TO METHIONINE USING THE SAME - The present invention relates to a novel protein having O-acetylhomoserine sulfhydrylase activity, a mutant protein thereof, a polynucleotide encoding the same, a recombinant vector comprising the polynucleotide, a microorganism transformed with the recombinant vector, and a method for producing methionine or acetic acid using the protein. The production method of the present invention has the advantage of producing L-methionine and acetic acid cost-effectively through having higher conversion rate and reduced reaction time compared to the existing methods, and it can minimize the amount of enzyme homogenate added when using the mutant protein, thereby easily producing L-methionine and acetic acid at high yield. | 10-17-2013 |
20130273615 | MODIFIED POLYPEPTIDE HAVING HOMOSERINE ACETYLTRANSFERASE ACTIVITY AND MICROORGANISM EXPRESSING THE SAME - The present invention relates to a polypeptide that is modified to have homoserine O-acetyltransferase activity, and in particular, the present invention provides a modified polypeptide having homoserine O-acetyltransferase activity, in which the amino acid at position 111 of a polypeptide having homoserine succinyltransferase activity is substituted with other amino acid. | 10-17-2013 |
20140162440 | SEMICONDUCTOR MEMORY DEVICES AND METHODS OF FORMING THE SAME - Methods of forming semiconductor devices may be provided. A method of forming a semiconductor device may include patterning first and second material layers to form a first through region exposing a substrate. The method may include forming a first semiconductor layer in the first through region on the substrate and on sidewalls of the first and second material layers. In some embodiments, the method may include forming a buried layer filling the first through region on the first semiconductor layer. In some embodiments, the method may include removing a portion of the buried layer to form a second through region between the sidewalls of the first and second material layers. Moreover, the method may include forming a second semiconductor layer in the second through region. | 06-12-2014 |
20140315263 | METHOD FOR THE PREPARATION OF NICOTINIC ACID - A method for the preparation of nicotinic acid, which includes the step of obtaining a culture solution containing quinolinic acid by incubating a microorganism having an ability to produce quinolinic acid, and the step of adding an acid to the culture solution and conducting a decarboxylation reaction. | 10-23-2014 |
20150031093 | L-ASPARTATE OXIDASE VARIANT AND A METHOD FOR PRODUCING QUINOLINATE OR NICOTINIC ACID USING THE SAME - To produce quinolinate effectively, a L-aspartate oxidase variant that the feedback regulation by nicotinic acid or NAD is released, and a microorganism including the L-aspartate oxidase variant are provided. Quinolinate may be effectively produced by culturing of the microorganism including the L-aspartate oxidase variant. | 01-29-2015 |