摘要:
The present invention relates to a method for producing L-methionine using a bio-synthesis process and a specific enzymatic process. More particularly, the present invention relates to a method for producing L-methionine with high yield by enzyme conversion reaction from L-methionine precursor in the presence of methyl mercaptan (CH 3 SH). The process of the present invention enables selective production of L-methionine which may be used in various fields of industry, such as feed- and food-additives, as raw material for medical supplies, pharmaceutical drugs, and the like.
摘要:
The present invention relates to a method for the preparation of nicotinic acid, which comprises 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.
摘要:
The present invention relates to novel uses of indole-3-alkylcarboxylic acid and derivatives thereof as a photosensitizer for the treatment of acne or for the inhibition of sebum secretion. More particularly, the present invention is directed to a photosensitizer for photodynamic therapy, a photodynamic therapy kit and photodynamic therapeutic composition comprising thereof, which contain indole-3-alkylcarboxylic acid being activated by light. The light which activates indole-3-alkylcarboxylic acid of the present invention may be ultraviolet rays or visible lights, preferably blue light or green light.
摘要:
A method of processing EPG metadata in a network according to one embodiment of the present invention includes the steps of performing a services discovery procedure utilizing multiple service discovery metadata components supplied by a service provider and processing an EPG metadata. Preferably, the performing step includes the steps of receiving a master SI table which locates in a master SI table location in provisioning information, wherein the provisioning information includes multiple elements, an EPG provider information element in the multiple elements having both a first target virtual channel map identifier element and an EPG data locator element, the first target virtual channel map identifier element indicating that services are covered by each of the EPG metadata provider's EPG data sources, receiving a virtual channel map table which locates in virtual channel map locations in the received master SI table, receiving a virtual channel description table which locates in virtual channel description table locations in the received virtual channel map table, and receiving a source table which locates in source table locations in the received virtual channel description table.
摘要:
The present invention relates to a method for producing L-methionine and organic acid comprising the following steps: Step 1) preparing a strain producing L- methionine precursor and producing L-methionine precursor by the fermentation of the strain; Step 2) producing L-methionine and organic acid by the enzyme reaction process with the L-methionine precursor as a substrate, and microorganism strains used in each step.
摘要:
The present invention relates to a composition comprising an extract of Tiarella polyphylla, and tiarellic acid isolated therefrom having anti-inflammatory, anti-allergic and anti-asthmatic activity. The extract of Tiarella polyphylla and the tiarellic acid isolated therefrom shows the inhibitory effect on the LTC 4 release in vitro test and the suppressive effect on the IgE level and the cytokine(IL-4, IL-5 and IL- 13) production, airway hyperresponsiveness, and leukocyte infiltration in OVA-induced asthmatic mice. Therefore, it can be used as the therapeutics or functional health food for treating and preventing inflammatory, allergic and asthmatic disease.
摘要:
The present invention relates to a method for preparing red old platycodon useful as a functional food material by steaming and dying old platycodon (cultivated over 20 years), as well as old red platycodon prepared thereby and a functional food material comprising the same. The method comprises the steps of: steaming old platycodon at a temperature of 90-120 °C for 1-2 hours; cooling the steamed platycodon; and drying the cooled platycodon at a temperature of 55-75 °C for 60-96 hours. The old red platycodon according to the present invention has an increased saponin content compared to general old platycodon, and thus can have increased pharmacological effects. Also, because it has a decreased number of microorganisms, the storage stability can be improved. Furthermore, because it has improved palatability with respect to taste and flavor, it can be used as a functional food material without needing to other sweeteners.
摘要:
The present invention relates to a method for screening of the lipase having improved enzymatic activity using yeast surface display vector and the mutant lipase prepared by the same, more particularly to the method comprising; 1) cloning lipase gene into surface display vector, 2) preparing mutant lipase gene library of the step 1 by mutagenic PCR, 3) transforming the mutant lipase gene library of the step 2 and surface display vector into host cell, and 4) measuring the activity of the mutant lipase displayed in the surface of the transformed host cell and selecting the mutant lipase prepared by the same. The method of the present invention can screen the lipase having improved enzymatic activity. So, it can effectively be used for the various fields, such as food and detergent industry.
摘要:
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 an appropriate ratio to O-acetylhomoserine or O-succinylhomoserine, and to an enzyme having an activity of transforming methionine to conduct an enzyme reaction, to thereby enhance the transformation rate from an L-methionine precursor into L-methionine and organic acid, and thus increasing L-methionine yield rate as compared to conventional methods.
摘要:
The present invention relates to a polypeptide capable of increasing the production of L- methionine in a microorganism. In particular, the present invention relates to an YgaZ and YgaH polypeptide or a complex thereof, referred to herein as YgaZH polypeptide, which are novel putative L- methionine exporters, polynucleotides encoding the same, a recombinant vector comprising the polynucleotide, a microorganism transformed with the recombinant vector, and a method for producing L-methionine and/or S-adenosyl-methionine, comprising the steps of culturing the transformed microorganism to produce L-methionine and/or S- adenosyl-methionine, and isolating L-methionine and/or S-adenosyl-methionine. The transformed microorganism of the present invention produces L-methionine in a high yield, thereby being used for medicinal and pharmaceutical industries and feed industry, in particular, animal feeds.