Abstract:
Disclosed is an automatic constant pressure polishing apparatus. The automatic constant pressure polishing apparatus comprises a housing having a hollow section therein, a rubber pad installed in the housing and having superior expansion and contraction characteristics, a pressure fixture having a male screw section, which is formed on an outer peripheral surface thereof in order to press and fix the rubber pad, and a central hole formed at a central portion thereof, a slider screw-coupled into the housing to adjust pressure in the housing according to a rotational degree of the rotating shaft, and a polishing pad installed at a front end portion of the housing.
Abstract:
The present invention relates to a method for reconstructing protein database for identifying a protein and a method for screening a protein using the same, more precisely a method for reconstructing protein database comprising the steps of i) Grouping proteins having a required homology by using the clustering software from the primary database which minimizes the overlapping of proteins and then recording sequence information of each protein group on a recording system of a computer; and ii) Designating a representative protein in each protein group and then constructing the representative protein database composed of the representative proteins, followed by recording the results containing sequence information on a recording system of a computer, and a method for identifying a protein using the same. The method for reconstructing protein database and the method for identifying the protein of the invention are very useful for the investigation of endogenous proteins and their functions and interactions, and are further effectively used for the development of diagnostic and therapeutic agents for various diseases.
Abstract:
A tandem Fourier transform ion cyclotron resonance mass spectrometer is provided. In the mass spectrometer, the ions selected by a FT-ICR mass analyzer, which can perform an ion selection process and a mass measurement process with a time interval between the processes, are transmitted through an ion guide to a collision cell, which is located a predetermined distance from the FT-ICR mass analyzer, to split into fragment ions. The fragment ions are transmitted to the FT-ICR mass analyzer that measures the mass of the fragment ions. The fragment ions are generated in the collision cell 60 established separately from the FT- ICR mass analyzer 40 according to the mass spectrometer. Accordingly, It can solve various problems (e.g., the radius reduction of cyclotron motion of colliding ions, or the removal of periphery gas after generating the fragment ions) occurred in a tandem mass spectrometer using a conventional tandem-in-time mass analysis method. Also, a high resolution and hith sensitivity measurement can be achieved. Moreover, when a reagent gas instead of a collision gas in the collision cell is injected, the gas phase reaction of the selected ions and the reagent gas can be observed, and the mass of the ions generated in the gas phase reaction can be measured.
Abstract:
Disclosed is a method for designing a superconducting magnet for generating high magnetic fields with high uniformity for controlling a stray field to be within an allowable range and acquiring structural and magnetic stability by optimizing the arrangement of positions and shapes of coils configuring the superconducting magnet. Volumes of a main coil and a shielding coil are set to be variables, and the critical value of a wires related on the current and magnetic field, the heat transfer depth, and the quench strain are defined to be restriction conditions so that linear programming is applied to determine an initial shape of the shielding coil and division of the main coil based on the sum of total volumes, that is, an objective function. The initial shapes of the main coil and the shielding coil determined through the linear programming are revised and the shape of a shimming coil is determined by using non-linear programming based on the objective function.
Abstract:
Disclosed is a method for discovering pharmacologically active substances from natural products at high speed, including: obtaining an activity profile by testing pharmacological activity of a plurality of samples; obtaining a mass profile based on a mass spectrum resulting from analysis of the samples by mass spectrometry; and determining molecular weight of pharmacologically active substances by comparing and analyzing the activity profile and the mass profile. The disclosed method allows fast discovery of pharmacologically active substances by performing high resolution mass spectrometry for numerous components included in an extract sample of natural products and comparing with the activity test data. The information about the intensity of the activity of the pharmacologically active substances of the natural products allows effective utilization of the natural products.
Abstract:
An ion injector may include: a first electrode comprising a first region allowing ions to pass; and a second electrode disposed to enclose one end of the first electrode. The second electrode may include: a second region aligned with the first region to allow the ions to pass; and a protruding portion extending along the path of the ions passing through the second region. A mass spectrometer may be configured by disposing the ion injector adjacent to a skimmer.
Abstract:
An apparatus for generating X-ray may include: a plasma chamber; a magnet unit for applying a magnetic field to the plasma chamber, the magnet unit configured to allow the control of the magnitude of the minimum magnetic field in the plasma chamber without change in structure; a microwave generator for applying microwaves to the plasma chamber; a reaction gas injected into the plasma chamber for generating X-ray through electron cyclotron resonance by the magnetic field and the microwaves; a variable guide for focusing the generated X-ray; and a variable extractor for outputting the focused X-ray from the plasma chamber.
Abstract:
An apparatus for transferring cryogenic refrigeration includes a cryocooler interface, a housing, a working fluid, a heat exchanger, a flexible thermal link, and a remote cartridge cold head. The cryocooler interface is thermally connected to a cryocooler providing a source of refrigeration. The refrigeration is passed from the crycooler into the heat exchanger via the cryocooler interface. The remote cartridge cold head is attached to a remote location. Heat is drawn from the remote location through the remote cartridge cold head and into the heat exchanger via the working fluid within the flexible thermal link and housing. Within the heat exchanger, heat is transferred from the working fluid to the refrigeration source, such as a cryocooler; accordingly, the remote location is cooled.
Abstract:
Provided are β-substituted Morita-Baylis-Hillman (MBH) derivatives, pharmaceutically acceptable salts, hydrates, solvates and stereoisomers thereof. The derivatives may be prepared by preparing β-iodo-MBH esters from a variety of carbonyl compounds such as aldehydes and ketones, or imines in the presence of a Lewis acid as a basic backbone, and substituting iodide on a vinyl position with a variety of substituents. In addition, the β-substituted MBH derivatives have an excellent pharmaceutical effect in preventing and treating cancer.