Two new records of the genus Nola Leach, 1815 (Lepidoptera: Nolidae, Nolinae) from Laos

Yeong–Bin Cha,Ulziijargal Bayarsaikhan,Sol–Moon Na,Dong–June Lee,Jae–Ho Ko,Tak–Gi Lee,Hyeong–Kyu Kim,Chang–Moon Jang,Han–Ul Kim,Yang–Seop Bae 한국응용곤충학회 2019 한국응용곤충학회 학술대회논문집 Vol.2019 No.04

The genus Nola (Nolidae, Nolinae) was established by Leach (1815), with the Noctua palliola Denis & Schiffermüller, 1775 (a junior subjective synonym of Phalaena cucullatella Linnaeus, 1758) from Vienna, Austria. Nola comprises over 200 species: Africa and western Palearctic approximately described 100 speices (Hacker et al., 2012); Oriental and Eastern Palearctic regions have over 100 species (László et al., 2010; Sasaki et al., 2011; Kononenko and Pinratana, 2013). Two species of the genus Nola Leach; Nola euryzonata (Hampson, 1900) and Nola lucidalis (Walker, 1865), reported for the first time in Laos. Illustrations of adults and genitalia of all the examined species are provided.

전자빔 진공증착을 이용한 치과용 임플란트재의 표면 전처리법에 따른 HA 코딩효과

고영무,최한철,최낙찬 大韓齒科器材學會 2002 대한치과재료학회지 Vol.29 No.4

The dental implant materials require good mechanical properties, such as fatigue strength, combined with a high resistance to corrosion. For increasing fatigue resistance and delaying onset of stress corrosion cracking, shot-peening has been used for over 50 years to extend service life of metal components, However, there is no information on the electrochemical behavior of shot-peened and hydroxyapatite(HA) coated Ti-6Al-4V alloys. To increase fatigue strength, good corrosion resistance, and biocompatibility, the electrochemical characteristics of Ti/TiN/HA coated and shot-peened Ti-6Al-4V alloys by EB-PVD have been researched by various electrochemical method in 0.9%NaCl The coated layer and surface showed the formation of dense and uniform surface in the case of TiN/HA and Ti/TiN/HA film coated samples. The hardness of shot-peened Ti-6Al-4V alloys(SPA) increased as SP treatment time increased. Electrochemical measurements showed that, in the case of shot-peened Ti-6Al-4V alloys, the corrosion and pitting potential increased due to the SP induced removal of defects, such as inclusion, scratch, and pore on the surface, whereas passivation and active current density decreased as the SP time increased. For the HA coated samples, pitting and repassivation potential increased in the order of Ti/TiN/Ha > TiN/HA > Ti/HA > HA coated SPA. Results suggest that the best pitting corrosion behavior is shown by Ti/TiN/HA coated SPA with a fatigue strength and biocompatibility.

아말감과 금합금 및 니켈-크롬합금의 접촉시 부식에 관한 연구

고영무,계기성 大韓齒科器材學會 1993 대한치과재료학회지 Vol.20 No.2

The purpose of this study was the effect of area ratio, the difference of electrolyte between artificial saliva and 0.9% NaCl solution and that of corrosion rate on amalgam in contact with the dental casting gold and the nickel-chromium alloy by measuring the amount of elements released in the electrolyte using Inductively Coupled Plasma Emission Spectroscopy (ICPES). After each amalgam alloy and Hg was triturated as the direction of the manufacturer by means of the mechanical amalgamator, the triturated mass was inserted into the disk shaped stainless steel mold 5mm in diameter and 4mm thick and condensed by using routine manner. The excess amalgam on the surface was removed by razor blade. Twenty-four hours after condensation, samples were removed from the molds and the standard surface preparation was routinely carried out. The specimens of casting gold and nickel-chromium alloy were all made from wax patterns prepared in a matrix with the same shape(30×10×1mm). Investing and casting were done according to the recommendations of each manufacturer. These specimens were ground with silicone carbide papers(#600) and polished. The polished samples were ultrasonically cleaned, rinsed in acetone solution and dried. Amalgam plugs was inserted into the casting gold and nickel-chromium alloy plates. The dental casting gold and nickel-chromium alloys were stored at 37℃±1℃ in glass beaker for 12 weeks in contact with a high copper amalgam, area relations 6 : 1 and 6 : 3, in an electrolyte of artificial saliva and 0.9% NaCl solution. The solutions were renewed each 4 weeks and analyzed for Cu, Zn, Sn, Hg, and Ag in an Inductively Coupled Plasma Emission spectroscopy (ICPES). From the experiments, following results were obtained : 1. In the case of amalgam in contact with dental casting gold alloy in the 0.9% NaCl solution, the amount of the copper released was greatest. 2. Generally, a corrosion reaction in the dental casting gold alloy in contact with amalgam was more severe than in the nickel-chromium alloy and in the acrylic resin. 3. The amount of elements released in the 0.9% NaCl solution was much more than in the artificial saliva solution and pH values of both of solutions were increased from 5.8 to 8.5. 4. The tendency for tin(Sn) to be released from the amalgam was greatest during the first 4 weeks and decreased with time elapsed, and silver(Ag) was greatest from the beginning of 9 weeks. 5. The amount of the metal elements released per ㎠ amalgam was larger for the 1 : 6 than for the 3 : 6 amalgam/gold ratio. 6. In the case of dental casting nickel-chromium alloys in contact with amalgam, the amount of another metal elements released was decreased due to severe releasing of nickel. 7. The corrosion rate of the amalgam was more influenced by the type of electrolyte than by the type of the dental casting alloy.

Dentacolor Resin System의 색안정성 및 물흡수도에 관한 연구

고영무,정재헌,최유석 大韓齒科器材學會 1995 대한치과재료학회지 Vol.22 No.2

The purpose of this study was to measure the color stability and water sorption of Dentacolor resin system at various time intervals over 6 week period. Ten, 20 x 1mm discs of the resin specimen were prepared according to ADA specification No.27 and cured with a photo-polymerization equipment(Dentacolor XS and Unilux AC). The color parameters of L*, a*, b* were measured with a computerized colorimeter(Hunter Associates Laboratory Inc., USA) in the transmittance mode. The total color change(ΔE) occurred during two different time periods was calculated using the following equation: ?? The amount of water sorption measurements was done in accordance with ADA specification No.27 for one week in distilled water at 37 ±1℃ and then stored extended up to 6 weeks. The obtained results were as follows : l. At first week, total color difference(ΔE) value of Dentacolor resin system was 1.430 ±0.664. 2. It was found that the range of total color difference(ΔE) of Dentacolor resin system was between 0.5∼1.430 for 6 weeks. 3, The amount of water sorption for one week was 0.30 ±0.119mg/cm²and it was lower than the 0.7mg/cm²/week for type Ⅱ composites in ADA specification No.27. 4. The amount of water sorption of Dentacolor resin system after 6 weeks was much more than its amount of water sorption of the first week, but it was not significant difference(p>0.05).

전해액의 종류에 따른 치과용 금합금의 전기화학적 부식 거동

고영무,최성욱 대한치과기재학회 2001 대한치과재료학회지 Vol.28 No.1

The effect of different electrolytes on the results from potentiodynamic polarization corrosion testing was studied for 3 different dental gold alloys. The obtained results were as follows. 1.From the potentiodynamic curves the corrosion behavior of natural saliva was similar to that of Darvell's and Hay & Hartles' artificial saliva solution. 2.Fusayama's and Tani & Zucchi's artificial saliva solutions were more corrosive than natural saliva, Darvell's and Hay & Hartles' artificial saliva solution. 3.The corrosion behaviors of Fusayama's and Tani & Zucchi's artificial solutions were very similar in case of Cast-1 and Cast-3. 4.3 kinds of all alloys showed that the amount of gold released was highest in Fusayama's artificial saliva solution. In conclusion, the corrosion behavior of natural saliva was similar to Darvell's and Hay & Hartles' artificial saliva and Fusayama's artificial saliva solution was the more corrosive than any other solutions. But the effect of different electrolytes the corrosion behavior of high gold alloys was not different highly.

최과 교정용 스테인리스 강 선재의 신선 가공법이 내식성에 미치는 영향

고영무,모웅남,최한철 大韓齒科器材學會 2003 대한치과재료학회지 Vol.30 No.1

The dental orthodontic wire requires good mechanical properties, such as elastic strength, combined with a high resistance to corrosion. For increasing elastic strength and delaying onset of stress corrosion cracking, drawing methods(one-step and two-step drawing) have been used in this study to extend service life of metal components, However, there is no information on the electrochemical corrosion behavior of drawn wires for orthodontics. To increase elastic strength, good corrosion resistance, and biocompatibility, the electrochemical characteristics of drawn wire have been researched by field emission scanning microscope and potentiodynamic method in 0.9% NaCl solution. The one-step drawn wire showed the formation of rough surface. The hardness and tensile strength of two-step drawn wire increased. Electrochemical measurements showed that, in the case of two-step drawn wire, the corrosion resistance and pitting potential increased compared with two-step drawn wire due to the drawing induced small surface roughness, such as scratch, whereas passivation and active current density decreased as the reduction in area for drawing increased.

최신 본딩재

고영무 대한치과기재학회 2000 대한치과재료학회지 Vol.27 No.4

아르곤 레이저와 가시광선에 의한 중합 후의 수복재와 치아와의 전단결합강도 비교

고영무,계기성,황호길 대한치과기재학회 1999 대한치과재료학회지 Vol.26 No.3

Previous preliminary researches have shown that argon laser will polymerize dental photo-activated resin materials. The purpose of this study was to compare the shear bond strength of dental restorative materials to teeth polymerized with an argon laser and visible light. An argon laser operating at 0.5W of power and a conventional visible light polymerization unit were used in testing shear bond strength between restorative materials and teeth. Specimens were prepared according to accepted standards for testing. A universal testing machine was used to shear bond strength 5㎜/min crosshead speed. In case of argon laser, exposure time were 10 second, whereas in case of visible light, exposure time were 40 second. The results showed that shear bond strength of F2000 Compomer(3M) polymerized with argon laser were superior to those of polymerized with visible light and there is significantly different(p<0.05). Whereas, in case of both OptiBond FL(Kerr) and Spectrum TPH(Dentsply) shear bond strength of composite resins polymerized with argon laser were slightly inferior to those of polymerized with visible light, but there is no significant difference(p>0.05). This study was supported by Research Funds from Chosun University,1996.

갈륨합금과 아말감의 전기화학적 부식거동 비교

고영무,최한철,강성남,강희영,이승윤 대한치과기재학회 1998 대한치과재료학회지 Vol.25 No.3

A gallium based alloy(GA) that was developed as a substitute for dental amalgam was investigated for electrochemical corrosion behavior in 4 kinds of electrolytes(1% lactic acid, 0.05% HCI, Modified Fusayama's artificial saliva, and 0.9% NaCl). The related corroded microstructure were examined and microanalyses were conducted using ICPES. Polarization tests were conducted by scanning from -1,500㎷ to 1,000㎷(vs.SCE) at 75㎷/min. The obtained results were as follows: 1. GA showed wide passivation area next to SYB in artificial saliva, suggesting good stability. 2. The amounts of Sn, Cu released from GA were similiar to those of CAV, and decreased in the order of KAT, SYB. 3. All of specimens were observed pits at the area of pores in electrolytes containing chloride ions, and forming much corrosion products in 1% lactic acid and artificial saliva after corrosion test. 4. From the surface analyses of XRD, GA showed much corosion products containing gallium at the surface after corrosion test. In conclusion, the corrosion resistance of GA was lower than that of SYB and similiar to that of CAV and KAT.

Lithium-Pilocarpine으로 유발된 중첩경련 흰쥐 모델에서 Ketamine의 항경련 및 신경 보호 효과

고석범,박성경,손영민,김영인 대한간질학회 2004 대한간질학회지 Vol.8 No.1