摘要:
The present invention relates to a floating apparatus for generating new and renewable energy. The floating apparatus includes: a plurality of kites configured to float in the sky; a plurality of extension lines extending so that the plurality of kites are connected to the ground; a power generation unit disposed on the kites and/or on the extension lines to generate electrical energy by means of solar light and/or wind velocity; and a distance-maintaining unit having a plane perpendicular to the direction of extension of each of the plurality of extension lines, the distance maintenance unit connecting the plurality of extension lines to each other so as to maintain a distance among the plurality of kites with respect to one another.
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 a WIG craft comprising multiple hulls, which comprises: a plurality of WIG craft vessel bodies comprising multiple hulls; a plurality of propulsion chambers which are provided on the upper parts to the rear of each of the vessel bodies and generate a propulsive force and air-cushioning pressure while off the water; an air-cushion chamber (or chambers) which is (are) positioned on the underside between each of the vessel bodies and guides (guide) propulsion propeller rear pressure while off the water so as to form an air cushion which is used to reduce water resistance; and a duct which forms a link between the propulsion chambers and the air-cushion chamber(s) such that the propeller rear pressure is transmitted to the air-cushion chamber and a cushioning pressure is created. This configuration has the advantageous effect that it solves the prior art problem of providing additional engines and hence allows a reduction in the costs incurred in the manufacture of WIG craft and the weight of WIG craft.
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:
Disclosed is a lift enhancer for a WIG craft, and more particularly, to a lift enhancer for a WIG craft positioned at the front and rear side of the wing which is to be expanded in the direction of the wing's chord to maximize ground effect by increasing the chord length and area of the wing and reducing the distance between the wing and the water surface. According to the present invention, when the WIG craft is flying over the water surface or taking off from or landing on the water, the trailing edge of the wing is not in contact with the water surface, such that the resistance from the water can be reduced to prevent the wing from being broken. In addition, ground effect can be maximized with a simple manipulation of the inventive lift enhancer.
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 a polypeptide which is modified so as to have homoserine acetyltransferase activity, and more particularly, provides a variant polypeptide having homoserine acetyltransferase activity by substituting the 111th amino acid from a starting methionine of a polypeptide having homoserine succinyltransferase activity.
摘要:
The present invention relates to a method for enhancing the solubility of methionine. More particularly, the present invention relates to a method which involves adding mineral and sulfuric acid at an appropriate ratio to enhance the solubility of methionine and to overcome the low solubility problems of methionine with regard to water, thereby increasing the solubility of methionine.
摘要:
The present invention relates to a novel protein having O-acetylhomoserine sulfhydrylase activity, a variant protein thereof, a polynucleotide encoding same, a recombinant vector including the polynucleotide, a microorganism transformed by the recombinant vector, and a method for producing methionine or acetic acid using the protein. The method for producing of the present invention has the advantage of economically producing L-methionine and acetic acid by having a higher transformation rate and reduced reaction time compared to existing methods, and can easily produce the L-metionine and the acetic acid with high yield by minimizing the amount of enzyme homogenate injected, when using the variant protein.
摘要:
Disclosed is an ergonomic conning display showing pieces of navigation information during ship operation among some kinds of navigation equipment on one monitor to design a bridge with an ergonomic concept. An ergonomicalIy designed bridge conning display can deliver a crewman pieces of information more speedily, and help processing the information. Therefore, the present invention can reduce marine accidents as well as present an ergonomic index in designing/developing a better conning display in the future and thus to be used as a sample.