열처리후 치과용 합금과 도재사이의 화학적 결합의 영향

남상용 대구보건대학 1992 대구보건대학 論文集 Vol.13 No.-

Real bondig beteen metal and procelain is influenced by various bonding Mecanisms which also influence each other, and is caused by aseries of complicated thermochemical reaction. For this reason, clear determination of the drgree and distribution. 1. Fators influencing the Bonding strength Chemical bonding 52% (including primary bond) Mechanical bonding 22% Compression bonding 26% 2. Effects of the Base Metal Elements Added to Allots. The elements Sn. In, and Fe were added originally in accordance with the concept that they might strengthen the Alloy though a dispersion effect. 3. We heated the Degudent G.U Dental porcelain and analysis the surface elemental chang by Energy Dyspersive X-ray analysis and obtained the result that mainly the In element was concentrated to the alloy surface.

한국잔디의 내음성에 관한 연구

남상용,한상경,김형기 한국잔디학회 1993 한국잔디학회지 Vol.7 No.1

This experiment was conducted to study on the morphological change and growth retardation of Korean Lawograss (Zoysia japonica Steud.) under various shading degrees. Dada of plant height, No. of tiller, No. of stolon, No. of rhizome and fresh weight were measured on the l47days after transplanting in 1991. The results are summarized as follows. Plant height was increased at 30% shading degree or over, Maximum plant height was observed at 60% shadeing degree which was 24.2 cm. while full sunlight(control) was most shorted as 10.1 cm. Plant height rapidly was increased as to shading degree increase. The decreasing rate was lower in tiller number and stolon number(top parts of plant) compared with the rhizome number(under ground part) was severely decreased at 30% to 60% of shading. To increase the shading degree, rhizome number was most severely decreased under shading degrees. As degree of shading increase to 30%, 60% and 90%, fresh weight decrease to 66%, 44%, 22% to full sunlight, respectively. Relative growth retadation of Korean lawngrass was decreased by the order of number of rhizome, fresh weight, number of tiller, number of stolon. And these characters were highly significant accord-ing to the different shading degrees.

2007년 한국공업화학회-한국막학회 공동심포지엄 지속가능한 청정에너지용 분리막 기술을 마치고

남상용 한국공업화학회 2007 공업화학전망 Vol.10 No.2

골프장 관리조건에서 시비와 토심에 따른 토양산도의 경시적 변화

남상용,김경남,김용선 한국잔디학회 2002 한국잔디학회지 Vol.16 No.1

This research was designed to know optimize soil sampling time, soil sampling depth and fertilizers according to season and soil condition in the golf course. One of the results was revealed that sampling point and depth have to be consistent for much fluctuation by sampling. Especially, Soil pH is decreased by soil depth remarkably. Top soil (0-5 cm depth) pH is higher than the sub soils (5-10 cm, 10-15 cm depth). It was confirmed that soil pH would increase when the state of soil is appropriate to H$^{+}$ ion concentration. Therefore, Soil pH modification is always not determined by lime content rather than soil conditions, i.e., Organic matter content, moisture content, and soil air content. More effective fertilizing time according to soil pH correction is the middle of october, and it's quantity is 100 g/$m^2$ silicate and 200 g/$m^2$ lime (Pel-Lime Mini) in this experiment. Recommended soil sampling method for acidity measurement is dividing by soil depth into each 5 cm respectively, rather than mixing 15 cm total soil.

2007년 추계 학술회를 마치고…

남상용 한국공업화학회 2007 공업화학전망 Vol.10 No.6

도재소부용 금합금에서 주석, 동의 첨가가 도재계면의 특성에 미치는 영향

남상용,곽동주 대구보건대학 2003 대구보건대학 論文集 Vol.23 No.-

This study was performed to obersered the compositions of oxide on the surface of dental porcelain gold alloy with various Tin and Copper addtions according to the degassing and analysing the change composition of additional elements Sn, Cu on diffusion behaviors of porcelain-metal surfaces. To investigate the micrstructure of oxidized alloy surface, EDAX and EPMA were used to investigate the diffusion behaviors of porcelain-metal surfaces. X-ray diffraction were used to observe the morphological changes in the oxidation zone. Te results of this study were obtained as follows: 1) The Tin oxidation increased with increasing Tin contents after heat treatment. Diffusion of Tin element increased with increasing tin contents in metal-porcelain sulface after heat treatment. 2) The Copper oxidation and diffusion not increased with increasing cpooer contents. 3) The oxidations of alloy surface were mainly SnO_(2) and CuO.

도재용 Ni-Cr합금표면의 주사전자현미경 관찰

南相鏞 대구보건대학 1996 대구보건대학 論文集 Vol.16 No.-

This study was carried out by observing to the composition of oxide on the surface of alloy according to the conditions of its heat treatment and analysing the change in composition on its surface in Ni-Cr alloy. The resurt of this study is summarized as fellows. It was shown that the higher the more the generated metal oxide while the higher the temperature of heat treatment and the metal oxide was manily composed of Ni and Cr oxides. In case of Rexillium, the Ni composition indicated increase and the Co composition indicated reduction while the higher the heat treatment. In case of Ceradium-V, the Cr composition indicated increase and Ni composition indicated reduction while the higher the heat treatment.

벼의 생육기별 수분결핍장애가 생육 및 수량에 미치는 영향

남상용,권용웅,권순국 한국농공학회 1986 한국농공학회논문집 Vol.28 No.2

Knowledge of the degree of yield reduction due to water stress at different crop growth stages in rice production is important for rational scheduling of irrigation during periods of insufficient water supply. Previous studies to determine the degree of yield reduction duo to water stress suffered from interruptions by rain during experiment. Also the findings did rot relate the degree of water stress to the soil water potential and water deficit status of rice plants. In this study, two years experiments were conducted using the high yielding rice varieties, an Indica x Japonica (Nampoong) and a Japonica variety(Choochung). These were grown in 1/200$^{\circ}$ plastic pots placed under a rainfall autosensing, sliding clear plastic roof facility to control rainfall interruptions. The results obtained were as follows. 1.The two varieties differed in the growth stage most sensitive to water stress as well as the degree of yield reductions. When rice plants were stressed to the leaf rolling score 4 and soil water potential of about - 20 bar at major crop growth stages which included heading, booting, non-effective tillering, panicle initiation and early tillering stages, the yield reductions in the Indica x Japonica variety were 58%, 34%, 27%, 22%, and 21%, respectively, whereas in the Japonica vairety they were 23%, 36%, 1%, 13% and 22%, respectively. This result show that the recommended drainage during non-effective tillering is valid only for the Japonica variety. Sufficient irrigation at booting, heading and early tillering stages are necessary for both varieties. 2.The two varieties showed visible wilting symptoms when the soil water potential dropped to about - 3.0 bar. The Japonica variety showed more leaf rolling than the Indica X Japonica. However, it had a higher retention of leaf water content and greater stomatal diffusive resistance. When the soil water potential dropped, the Japonica variety showed leaf rolling score (LRS) 1 at 0 soil-5. 0 bar and LRS 2 at 0 soil -6.0 bar while the Indica X Japonica showed LRS 1 at 0 soil - 5.5 bar and LRS 2at 0 Soil - 9.0 bar. The stomatal diffusive resistance was maximum at the second top leaf blade in both varieties at intermediate water stress of 0 soil - 4.5 bar. 3.The number of days that was required for the soil water potential to drop to-3. 0 bar and to - 20.0 bar after drainage of irrigation water from the 20cm deep silty clay loam soil in the pots were 6 and 13 days, respectively for booting stage, and 7 and 11 days, respectively for heading stage, 9 and 12 days, respectively for panicle initiation stage, and 12 and 19 days, respectively for early tillering stage. 4.Water stress during the early tillering stage recorded the longest delay in beading time, the largest reduction in panicle numbers and a substantial yield decrease of 20%. This calls for better water management to ensure the availability of water at this stage, particularly during drought periods. In addition, a reexamination of the conventional inter-drainage practice during the non-effective tillering stage is necessary for the high yielding Indica X Japonica varieties.

도재소부용 저금함유금합금에서 열처리에 따른 Sn의 영향

남상용,김치영,조현설 대구보건대학 1999 대구보건대학 論文集 Vol.19 No.-

This study was carried out by oberserving to compositions of oxide on the surface of dental porcelain low gold alloy with various Indium addtions according to the degassing and analysing the change composition of additional elements Sn on diffusion behaviors of porcelain-metal surfaces. The specimens used were Au-Pd-Ag alloys by small Tin addition. These specimens were treated for 10min at 1000℃ in vacuum condition. To investigate the micrstructure of oxidized alloy surface, SEM and EDAX were used and EPMA were used to investigate the diffusion behaviors of porcelain-metal surfaces. X-ray diffraction were used to observe the morphological changes in the oxidation zone. Te results of this study were obtained as follows: 1) The Tin oxidation increased with increasing Sn content after hear treatment. 2) In concentration of Sn on metal-porcelain surface, Sn-6 was most significantry increased 3) In thickness of Sn on metal-porcelain surface, Sn-9 was most significantry increased 4) The oxidations of alloy surface were mainly SnO₂.

도재소부용 저금함유금합금에서 도재계면의 표면거동에 미치는 미량원소 In의 영향

남상용,이기대 대한치과기공학회 1999 대한치과기공학회지 Vol.21 No.1