Abstract:
There is provided a method for forming a pattern on a wafer by direct etching with neutral particle beam, comprising a) penetrating the neutral particle beam through a mask into which the pattern is formed, b) directly colliding the neutral particle beam passed through the mask with the wafer onto which no photo-resist is coated, and c) removing wafer-forming material of a region that comes in contact with the neutral particle beam to form negative pattern on the wafer. The method makes it possible to form the pattern on the wafer by direct etching, even without coating of the photo-resist, exposure, developing or removal of the photo-resist. And it avoids disadvantages caused by direct contact of shields with the wafer, such as difficulty in the organized arrangement of the shields onto the wafer and damage to the wafer by the shields.
Abstract:
The present invention relates to methods for manufacturing manganese oxide nanotubes/nanorods using an anodic aluminum oxide (AAO) template. In the inventive methods, the manganese oxide nanotubes/nanorods are manufactured in mild conditions using only a manganese oxide precursor and an anodic aluminum oxide template without using any solvent. The nanotubes/nanorods having uniform size can be easily obtained by adsorbing the manganese oxide precursor onto the surface of the anodic aluminum oxide template by a vacuum forming process using a vacuum filtration apparatus so as to maintain the shape of nanotubes/nanorods and drying the manganese oxide nanotubes. The manganese oxide nanotubes/nanorods made according to the inventive methods can be used as economic hydrogen reservoirs, the electrode of lithium secondary batteries, or the energy reservoirs of vehicles or other transport means.
Abstract:
The present invention relates to an apparatus and a method for producing hydrogen gas. The hydrogen gas production apparatus of the present invention comprises a) a dielectric hollow tube, b) a means for maintaining the dielectric hollow tube to a reduced pressure, c) a microwave source that generates a microwave, d) a waveguide coupled to the microwave source that applies the microwave to the dielectric hollow tube, e) a gas supply source that supplies a hydrogen element-containing gas into the dielectric hollow tube, wherein the hydrogen element-containing gas supplied into the dielectric hollow tube undergoes plasma discharge with aid of the microwave from the waveguide and produces reaction products including hydrogen gas through intramolecular bond breakage rather than heat decomposition, by collision of an electron produced by the plasma discharge with the hydrogen element-containing gas, and f) a separator that separates the hydrogen gas from the reaction products. The hydrogen gas production apparatus has a simple constitution and provides small scaled production of the hydrogen gas in a simple and efficient manner.
Abstract:
The present invention relates to a method for phosphorylation site-specific labeling of phosphoproteome with a site-specific tagging reagent and analyzing of the resulting labeled one, more especially, a method for in-situ tagging of phosphorylation sites of phosphoproteins retained in polymeric gel with a nucleophilic tagging reagent. It also relates a method for generating new proteolytic cleavable sites at formerly phosphorylation sites by a proper choice of a nucleophilic tagging reagent. It also relates to a method for phosphopeptides analysis and phosphorylation site identification by in-gel digestion of the previously in-gel tagged proteins and subsequent mass analysis of the resulting peptides. The invention provides in-gel chemical tagging method for phosphoaminoacid residue of phosphoproteins retained in polymeric gel matrix. Phosphoprotein can be immobilized into gel matrix by a variety of methods such as gel electrophoresis. The immobilized phosphoproteins are retained in gel matrix during tagging reaction to phosphorylated aminoacid residue of phosphoproteins, and the resulting tagged proteins are also retained in gel matrix till following purification steps like washing of the tagging reagents are accomplished. The tagged proteins is digested by protease, and the resulting digested peptides is released from gel into solution and applied for peptide mass analysis.
Abstract:
The present invention relates to the method for tagging of carbohydrates with active methylene compound. Particularly, it relates to the method for tagging of carbohydrates with active methylene compound comprising the step of preparing carbohydrate conjugate in which carbohydrate and methylene compound are combined by mixing carbohydrate mixture and methylene compound under aqueous polar aprotic solvent containing amine base catalyst. The tagging method of the present invention does not need many kinds of chemical reagent and the reactions can be taken even in the presence of certain amount of impurities. So, it can be used for the analysis of oligosaccharide present in the various kinds of samples.
Abstract:
A Fourier transform ion cyclotron resonance mass spectrometer (FT-ICR MS) includes: an ionization source generating ions; a deceleration lens, on which the ions generated by the ionization source and spatially dispersed are incident, selectively decelerating the incident ions so as to decrease the distance between the ions; and an ion cyclotron resonance cell on which the ions passing through the deceleration lens are incident. By preventing dispersing of ions due to mass difference and converging the ions using the deceleration lens, the mass range that can be measured at one time can be extended. Also, measurement sensitivity can be improved since the ions are effectively introduced to the ICR cell.
Abstract:
A workstation for cryogenic transmission electron microscopy. Liquid nitrogen, which is confined in a space defined by the step of a transparent cover detachably mounted on an insulated vessel, serves as a boundary layer for preventing moisture in the atmosphere from being frozen on the top of the transparent cover. Further, a height adjuster is disposed on the lower surface of a stand on which a Dewar vessel is disposed, and inclines the stand such that an installation height of the Dewar vessel is higher than that of the insulated vessel. Thereby, the liquid nitrogen cannot come into direct contact with an O- ring interposed between a holder and a holder insertion socket, and blocks of ice generated by mixture of moisture with the liquid nitrogen can be collected to one side to thus prevent contamination of the sample.
Abstract:
The present invention relates to an apparatus for measuring the temperature of a cryo EM- holder specimen cradle used in a transmission electron microscope (TEM) and a method for measuring the temperature thereof using the same. The apparatus for measuring the temperature of a cryo EM-holder specimen cradle can measure an exact temperature by directly measuring the temperature of the cryo EM-holder specimen cradle used in a transmission electron microscope (TEM), as well as perform an experiment on the cryo EM-holder in the vacuum state as the inside of the TEM, and a method for measuring the temperature thereof using the same.
Abstract:
Disclosed is a moon grid for transmission electron microscopy tomography, including a mesh sheet for protecting an upper objects and a support film formed on the mesh sheet and having nanoparticles dispersed throughout, in which the nanoparticles dispersed throughout the support film are used as reference points in the reconstruction of two-dimensional transmission electron microscopy images into a three-dimensional image, thus omitting a process of attaching markers in the course of preparation of a sample and easily forming reference points even on a sample to which it is impossible to attach markers. A method of fabricating such a moon grid is also provided.
Abstract:
The present invention relates to novel octahydro indeno derivatives, pharmaceutically acceptable salts, hydrates, solvates and stereoisomers thereof, and pharmaceutical compositions for treating or preventing cancer comprising the same. Since the compounds according to the present invention have high cytotoxicity against cancer cells, they may be usefully used as medical uses such as anticancer agents or antibiotics.