• The Journal of Korean Medicine
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• v.25 no.1
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• pp.40-48
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• 2004

Background and Objectives: Aroma therapy using Eucalyptus Globulus essential oil for curing allergic rhinitis is an inhalation treatment which has been applied as an aid to oriental clinics which use a fundamental treatment such as acupuncture and herbs. There have been no studies so far performed on the effect of this oils' use, only . We aimed to find out the therapeutic effect of its exclusive use only on an Animal Model with Allergic Rhinitis. Materials and Methods: Sprague-Dawley rats were induced the allergic rhinitis by ovalbumin solution. And then, rats in the treated group were treated by diffusing Eucalyptus essential oil in a flask for 7 days. Compared with the treated group, rats in the control group were treated by diffusing normal saline in a flask for 7 days. We observed changes in glandular cells and mast cells in nasal mucosa and submucosa; also changes in the number of eosinophils and neutrophils in blood and the succus of rhinenchysis. Results: The number of neutrophils in the succus of rhinenchysis was significantly decreased in treated group compared with control group(p<0.05). The number of neutrophils in blood and mast cells in nasal mucosa were decreased in the treated group but, these were not significant statistically(p>0.05). Histologic changes showed edema; congestion and expansion of grandular cells in nasal submucosa and hypertrophy of epithelium in nasal mucosa were decreased in treated group compared with control group. Conclusions: The results may suggest that the inhalation treatment using Eucalyptus essential oil decreases the inflammatory response on an Animal Model with Allergic Rhinitis.

• Tribology and Lubricants
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• v.25 no.1
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• pp.7-12
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• 2009

Coating brittle intermetallic compounds on metal can enlarge the range of their use. It is found that intermetallic compound coating layers made by only combustion synthesis in an electric furnace have porous multi-phase structures containing several intermediate phases, even though the coating layers show good wear resistance. In this study, dense $Ni_{3}Al$ single phase layer corresponding to the initial composition of the mixed powder is coated on two different ferrous materials by the diffusing treatment after combustion synthesis. After- ward, sliding wear behaviors of the coating layer are evaluated in comparison with that of the coating layer with porous multi-phase structure made by only combustion synthesis. As a result, the wear properties of the coating layer composed of dense $Ni_{3}Al$ single phase are considerably improved at the range of low sliding speed com- pared with that of the coating layer with porous multi-phase structure, particularly in the running-in wear region. This is attributed to the fact that wear of the coating layer is progressed by shearing as a sequence of adhesion, not by occurring of pitting on the worn surface due to having dense structure without pores.

• Journal of Physiology & Pathology in Korean Medicine
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• v.26 no.6
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• pp.803-811
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• 2012

Oriental Medicine always attach great importance to the damp diseases. Dampness is related with many organs and many clinical diseases. The cause and the location of the damp disease, nature of the symptoms, combination with other pathogenic factors are very diverse. This article analyzed the concept, cause of disease, pathogenesis, characteristic of symptoms, treatment method and prescriptions of Epidemic Warm Diseases of dampness syndrome and cases of dampness-heat diseases based on the theories of Epidemic Warm Diseases and found that theories of Epidemic Warm Diseases have very wide area of application. Dampness is classified into cold-dampness and dampness-heat by combination of heat or cold. The dampness syndrome is related with organs such as lung, spleen, kidney, triple energizers and bladder, and affects liver and heart. The basic treatment methods are dispelling dampness turbidity and diffusing qi movement. The detail treatment methods are spreading lung qi with lightness and resolving dampness and excreting turbidity in upper energizer, opening and dipping down with pungent-bitter and diffusing qi movement and strengthening the spleen and stomach in the middle energizer, draining dampness with bland in the lower energizer. Warming Yang is the main method of treatment for cold-dampness and clearing heat is for dampness-heat with the assistant methods such as resolving dampness and promoting the flow of qi. 5. Acute fever, virus diseases, epidemic diseases among modern diseases are much related with the dampness-heat syndrome.

• Journal of the Korean Crystal Growth and Crystal Technology
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• v.29 no.2
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• pp.50-53
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• 2019

In this study, polycrystalline silicon thin film useful for the solar cells was fabricated by AIC(Aluminum Induced Crystallization) process. A diffusing barrier for this process is prepared with $Al_2O_3$. For the maximization of the grain size of the polycrystalline silicon, a selective blasting of the $Al_2O_3$ diffusing barrier was conducted before annealing treatment. The heat treatment for the activation of the amorphous-Si (a-Si) layer was carried out with Rapid Thermal Annealing (RTA) process. Crystallization of the a-Si layer was analyzed with XRD. It was confirmed that a-Si was crystallized at $500^{\circ}C$ and the silicon crystal is observed to be formed and the grain size of the polycrystalline silicon was observed to be $15.9{\mu}m$.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.30 no.10 s.253
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• pp.1284-1292
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• 2006

Heat treatment is a controlled heating and cooling process to improve the physical and/or mechanical properties of metal products without changing their shapes. Today finite element method is widely used to simulate lots of manufacturing processes including heat treatment and surface hardening processes, which aims to reduce the number of time- and cost-consuming experimental tryouts. In this study we tried, using this method, to simulate the full carburizing process that consists of carburizing, diffusing and quenching, and to predict the distribution of carbon contents, phase fraction and hardness, thermal deformation and other mechanical characteristics as the results. In the finite element analysis deformation, heat transfer, phase transformation and diffusion effects are taken into consideration. The carburizing process of a lock gear, a part of the car seat recliner, that is manufactured by the fine blanking process is adopted as the analysis model. The numerical results are discussed and partly compared with experimental data. And a combination of process parameters that is expected to give the highest surface hardness is proposed on the basis of this discussion.

• Journal of the Korean Crystal Growth and Crystal Technology
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• v.12 no.4
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• pp.210-214
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• 2002

The crystallization behavior of amorphous silicon (a-Si) film was investigated by using Cu-field aided lateral crystallization (Cu-FALC) process below $450^{\circ}C$. The lateral crystallization was induced from the Cu deposited region outside of pattern toward the Cu-free region inside of the pattern by applying an electric field during heat treatment. As expected, the lateral crystallization toward Cu-free region proceeded from negative toward positive electrode side. The occurrence of Cu-FALC phenomenon was interpreted in terms of dominant diffusing species in the reaction between Cu and Si. Even at the annealing temperature of $350^{\circ}C$, the large dendrite-shaped branches were formed in the crystallized region and the polarity in the lateral crystallization was clearly observed. Consequently, we could successfully crystallize the a-Si at the temperature as low as $350^{\circ}C$ by an electric field of 30 V/cm with fast crystallization velocity of 12 $\mu$m/h.

• Journal of the Korean Institute of Electrical and Electronic Material Engineers
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• v.17 no.2
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• pp.150-155
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• 2004

This study attempts to form a TiN barrier layer against Cu diffusion by the easier and more convenient method. In this new approach, Ti was sputter-deposited, and nitrided by heat-treating in the NH$_3$ambient. Sheet resistance of as-deposited Ti was 20 Ω/$\square$, but increased to 195 Ω/$\square$ after the heat-treatment at 30$0^{\circ}C$, and lowered to 120 Ω/$\square$ after the heat-treatment at 50$0^{\circ}C$, and $600^{\circ}C$. AES results for these thin films confirmed that the atomic ratio of Ti and N was close to 1:1 at or above 40$0^{\circ}C$ heat-treatment. However, it was also found that excessive oxygen was contained in the TiN layer. To examine the barrier property against Cu diffusion, 100nm Cu was deposited on the TiN layer and then annealed at 40$0^{\circ}C$ for 40 min.. Cu remained at the surface without diffusing into the Si layer.

• Korean Journal of Metals and Materials
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• v.50 no.11
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• pp.809-815
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• 2012

Recently, as the interest in improving energy efficiency has grown, the demand for vehicle and machine parts that are resistant in high temperature corrosive conditions and abrasive environments has increased. Pack chromizing treatment of sintered steels is a profitable method that satisfies both corrosion resistance and low friction properties. Since austenitic stainless steels have good corrosion resistance but low mechanical hardness, if they are replaced by sintered steel parts with pack chromizing treatment, all the desirable properties such as low price, easy molding, high hardness, low frictional coefficient, and high corrosion resistance, can be obtained. The higher corrosion resistance of the chromized parts over that of the austenitic stainless steels was acquired by coating chromium carbides and a thin chromium oxides layer on the surface. Moreover, the surface morphology of chromized parts, which were composed of chromium rich phases and hardened chromium carbides by diffusing and alloying, had a peak-and-valley shape so that the dimple effect by the wrinkled morphology and high hardness induced a low friction coefficient.

• The Korean Journal of Ceramics
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• v.2 no.4
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• pp.184-187
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• 1996

Diamod nucleation by mw assisted CVD was examined various conditions namely, (1) diamond nucleation on variour substrate materials, such as Si, cubic BN, pyrolytic BN and AIN, (2) AST(Activated species transport) method which promote nucleation of diamond on single crystal and polycrystalline alumina substrate was developed. (3) Effect of bias enhancement of nucleation on single crystalline Si was examined, and finally (4) DST (Double step treatment) method was developed to enhance diamond nucleation on Ni. In this method, we separated carbon diffusing process into Ni, carbon precipitating process from the inside of Ni and diamond precipitation process.

• Bulletin of Food Technology
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• v.18 no.2
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• pp.99-108
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• 2005

As an alternative to gaseous sanitizer which having penetrating and diffusing capacities, aerosolsanitizer’s effect on killing pathogens was investigated. To test the efficacy of aerosolized sanitizer, peroxyacetic acid was aerosolized($5.42-11.42\mum$) by nebulizer(Royal-G Enterprise, ShenZhen,China) in a model cabinet against artificially inoculated target microorganisms on lettuce. Lettuceleaves were inoculated with a cocktail of three strains each of Escherichia coli O157:H7, Listeriamonocytogenes, and Salmonella Typhimurium and treated with sanitizer aerosol for 10 min, 30 and60 min in a model aerosol cabinet at room temperature($22\pm2^\circC$). After treatment, surviving cellsincluding injured cells were enumerated on appropriate selective agar or using the over-lay agar method, respectively. Inoculated lettuce leaves exposed to antimicrobial aerosol for 10 min experienceda 0.8 log reduction in E. coli O157:H7, a 0.3 log reduction in Salmonella Typhimurium and a 2.5 logreduction in L. monocytogenes when compared to the control. After 30 min treatment, the threepathogens were reduced in number of CFU by 2.2, 3.3, and 2.7-log and after 60 min, the reductions were 3.4, 4.5, and 3.8-log, respectively. Aerosolization can be new antimicrobial agents deliverysystem in food sanitizing.