http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
알루미늄 밸브스프링 리테이너용 내마모 DLC 코팅기술 개발
안정욱(Jeong-Uk Ahn),안승균(Seong-Gyun Ahn),김형익(Hyung-Ik Kim),전영하(Young-Ha Jun) 한국자동차공학회 2007 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
The use of light-weight materials in automotive engine components has increased in order to achieve better fuel efficiency and engine performance. In this study, Al alloy(Al5056) valve spring retainer can reduce a weight by 63% in comparison to steel and improve the upper limit of engine speed by about 500rpm. The Al valve spring retainer was fabricated by cold forging and coated with hard anodizing, DLC(diamond like coating), cold spray and thermal spray for better wear resistance and durability. We conclude that among these materials the DLC coating improves the wear resistance of Al valve spring retainer and has a sufficient durability after endurance testing.
안정욱(JeongUk Ahn),안승균(SeongGyun Ahn),여인웅(InWoong Lyo),김형익(HyeongIk Kim),김웅(Woong Kim) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5
We have developed a well designed sputter DLC coating on valve lifter, which has reduced the mechanical friction by 40% and improved the fuel efficiency by 0.8%. This paper is focusing on mutual correlation between friction characteristic and the microstructure of DLC such as hydrogen concentration, sp3/sp2 ratio and I(D)/I(G).
안명석 ( Ahn Myung-seog ),안정욱 ( Ahn Jung-wook ),전영정 ( Jeon Young-jeong ) 한국구조물진단유지관리공학회 2017 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.21 No.1
A new high-rise building in downtown before Underground excavation work, These steps are conducted such as RMR analysis, Schmidt Hammer Test, and Rock Mass Classification by Breakability, After that rock digging work will begin.
이희주,차영애,안정욱,장일무,Lee, Hee-Joo,Cha, Young-Y.,Ahn, Jung-W.,Chang, Ill-M. 생화학분자생물학회 1984 한국생화학회지 Vol.17 No.3
9-$\beta$-D-Arabinofuranosyladenine-5'-methoxyacetate (ara-A-MA) 및 1-$\beta$-D-Arabinofuranosylcytosine-5'-methoxyacetate (ara-C-MA)를 합성하였다. 이들 물질의 항암작용을 검토한 바, sarcoma 180 암세포를 이식한 mice중 생리식염수만 공급 받은 negative 대조군은 생존일수가 $16.3{\pm}4.1$일이었고, positive 대조군인 ara-C(13.9 mg/kg/mouse)를 투여 받은 실험군은 생존일수가 $22.0{\pm}2.5$ 일이었다. ara-A-MA를 투여 받은 시험군은 $20.8{\pm}2.9$일(19.4 mg/kg/mouse) 이었고, ara-C-MA를 투여 받은 실험군은 $23.1{\pm}3.3$일(18.0 mg/kg/mouse) 및 $20.1{\pm}2.2$일(1.8 mg/kg/mouse)의 생존일수를 각각 나타내었다. 한편 이들 합성 화합물은 DNA 합성을 억제하는 작용을 나타내었는데, ara-A-MA는 Fischers media에 배양한 sarcoma 180 암세포의 DNA 생합성을 $10^{-3}\;M$ 농도에는 57% 그리고 $10^{-4}\;M$에서 50%를 억제하고, ara-C-MA는 94% 및 80%를 각각의 농도에서 억제시켰다. 이들 결과는 ara-A-MA 및 ara-C-MA가 ara-A 및 ara-C의 prodrug으로서 역할을 할 수 있는 가능성을 시사한다. 9-$\beta$-D-Arabinofuranosyladenine-5'-methoxyacetate (ara-A-MA) and 1-$\beta$-D-Arabinofuranosylcytosine-5'-methoxyacetate (ara-C-MA) were synthesized. Their antitumor activities were evaluated against sarcoma 180 tumor cells inoculated in mice. When administered intra peritoneally once daily for 6 days, average life-spans for those which received ara-A-MA, ara-C-MA, ara-C and saline (0.9%) were; $20.8{\pm}2.9$(19.4 mg/kg/mouse) and $19.1{\pm}2.5$(1.9 mg/kg/mouse) days; $23.1{\pm}3.3$(18.0 mg/kg/mouse) and $20.1{\pm}2.2$(1.8 mg/kg/mouse) days; $22.0{\pm}2.5$(13.9 mg/kg/mouse) days; and $16.3{\pm}4.1$ days, respectively. This survival study indicates that ara-A-MA and ara-C-MA exhibit antitumor activities as much potent as their parent compounds of ara-C. DNA biosynthesis in Sarcoma 180 cells in vitro were also inhibited by ara-A-MA. At the concentrations of $10^{-3}$ and $10^{-4}\;M$, ara-A-MA and ara-C-MA showed 57 and 50%, 94 and 80% inhibitions of DNA synthesis in comparison with that of negative control group, respectively.
이희주,차영애,안정욱,장일무 ( Hee Joo Lee,Young Y . Cha,Jung W . Ahn,Ill M . Chang ) 생화학분자생물학회 1984 BMB Reports Vol.17 No.3
9-β-D-Arabinofuranosyladenine-5`-methoxyacetate (ara-A-MA) and 1-β-D-arabinofuranosylcytosine-5`-methoxyacetate (ara-C-MA) were synthesized. Their antitumor activities were evaluated against sarcoma 180 tumor cells inoculated in mice. When administered intraperitoneally once daily for 6 days, average life-spans for those which received ara-A-MA, ara-C-MA, ara-C and saline (0.9%) were; 20.8±2.9(19.4 ㎎/㎏/mouse) and 19.1±2.5 (1.8 ㎎/㎏/mouse) days; 23.1±3.3(18.0 ㎎/㎏/mouse) and 20.1±2.2(1.8 ㎎/㎏/mouse) days; 22.0±2.5(13.9 ㎎/㎏/mouse) days; and 16.3±4.1 days, respectively. This survival study indicates that ara-A-MA and ara-C-MA exhibit antitumor activities as much potent as their parent compounds of ara-C. DNA biosynthesis in Sarcoma 180 cells in vitro were also inhibited by ara-A-MA. At the concentrations of 10^(-3) and 10^(-4) M, ara-A-MA and ara-C-MA showed 57 and 50%, 94 and 80% inhibitions of DNA synthesis in comparison with that of negative control group, respectively.