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오성훈 한국식품영양과학회 2009 식품산업과 영양 Vol.14 No.1

A Study on Modeling and Optimization of Tooth Microgeometry for a Helical Gear Pair

오성훈,류성기,오세웅,강재화,이인범 한국정밀공학회 2013 International Journal of Precision Engineering and Vol. No.

The wind industry grew in the first decade of the 21st century at rates consistently above 20% a year. For wind turbine, gearbox failure can be extremely costly in terms of repair costs, replacement parts, and in lost power production due to downtime. For the gearbox used in wind turbine, gear transmission error (T.E.) is the excitation that leads the tonal noise known as gear whine, and radiated gear whine is also the dominant source of noise in the whole gearbox. In this paper, gear tooth micro-modification for the high speed stage was used to compensate for the deformation of the teeth due to load and to ensure a proper meshing to achieve an optimized tooth contact pattern. The gearbox was firstly modeled in Romaxdesigner software, and then the various combined tooth modification were presented, and the prediction of transmission under the loaded torque for the helical gear pair was investigated,the transmission error, transmission harmonics, normal load distribution were also obtained and compared before and after tooth modification under one torque. The simulation results showed that the transmission error and normal load distribution under the load can be minimized by the appropriate tooth modification. It is a good approach where the simulated result is used to improve the design before the prototype is available for the test.

Alkaline Protease 고 생산성 세균의 선별 및 효소 특성

오성훈,오평수 한국미생물 · 생명공학회 1991 한국미생물·생명공학회지 Vol.19 No.1

A bacterial strain No.71, which produced alkaline protease, was isolated from soil and identified to the genus Bacillus. With the successive mutation, a mutant strain No. M-71, having high alkaline protease productivity, was obtanined from the parental strain No 71. Alkaline protease productivity of mutant strain No. M-71 was about 50 times as much as that of the parental strain No.71. The enzyme preparations showed strong activities toward casein, the optimum pH being 11.0 and the optimum temperature about $55^{\circ}C$.

Improvement of Aspergillus niger 55, a Raw Corn Meal Saccharifying Enzyme Hyperproducer, through Mutation and Selective Screening Techniques

오성훈,오평수,Oh, Sung-Hoon,O, Pyong-Su 한국미생물 · 생명공학회 1991 한국미생물·생명공학회지 Vol.19 No.2

Mutation experiments were performed to select the mutant of Aspergillus niger 55, which had lost almost all the ability to produce transglucosidases but retained that of high productivity of raw meal saccharifying enzyme, by means of successive induction with N-methyl-N'-nitro-N-nitrosoguanidine(MNNG), ultraviolet(UV) light, and ${\gamma}$-rays. Also, we used the mutant enrichment techniques, such as liquid culture-filtration procedure and differential heat sensitivity of conidia, in order to increase the possibility of obtaining a mutant. The glucoamylase productivity of mutant PFST-38 was 11 times higher than that of the parent strain. The mutant PFST-38 was morphologically identical to the parent strain, except for the size of conidia, the tendency to form conidia and the lenght of conidiophore. Asp. niger mutant PFST-38 apeared to be useful for the submerged production of the raw corn meal saccharifying enzyme.

옥수수 생 전분 당화 효소 생산 곰팡이의 분리 및 동정

오성훈,오평수 한국미생물 · 생명공학회 1990 한국미생물·생명공학회지 Vol.18 No.6

산업적인 응용을 위한, 생 전분 분해력이 높고 액체 배양에 적용 가능한 균을 토양으로부터 분리한 결과, 옥수수 생 전분 당화 효소 생산력이 높은 곰팡이 No.55 균주를 분리하고 이 균주의 형태적, 생리적, 배양특성을 조사, 균 동정을 행한 결과 No.55 분리균은 Aspergillus niger 또는 그 유연균으로 동정되었다. We have been searching microorganisms which produce highly active raw starch saccharifying enzyme and also have a good cultivation characters in submerged culture. About 170 strains of molds isolated from soil and compost were tested for their amylase productivity on plate contained 2% raw corn meal. Thirty-four strains out of 170 strains produced clearance on the plates, and were tested for their raw starch saccharifying activity. Then, 4 strains which had shown relatively high levels of saccharifying activity were selected. Among them, Strain No. 55 was found to have highest level of raw starch saccharifying activity, and selected for the further studies. In this paper, the morphological, physiological and cultural characteristics of Strain No. 55 were described. Based on the results obtained in these experiments, Strain No. 55 was identified to be a similar species to Aspergillus niger.

뇌막염후 병발된 뇌수종의 외과적 치료에 관한 임상적 고찰

오성훈,최중언,장재훈,한용표,이규창 대한신경외과학회 1983 Journal of Korean neurosurgical society Vol.12 No.4

To evaluate the surgical results, the author made a clinical analysis on 70 patients of postmeningitic hydrocephalus who had been treated surgically. And the results were summarized as follows. 1) The tuberculous meningitis was the most common type causing the postmeningitic hydrocephalus (72.9%). 2) Among 70 patients, 51 were male and 19 were female. About 40% of cases were under 5 years old. 3) The most common clinical symptom was vomiting (67%). Headache, fever and generalized seizure were symptoms in order of frequency. Neurological signs represented neck stiffness, cranial nerve palsy and motor weakness. 4) The most common clinical condition on admission was stage 3 (advanced cases with unconciousness and severe neurological deficits). 5) The spinal fluid analysis showed more abnormal findings comparing to the ventricular fluid. But ventricular pressure was higher than spinal fluid pressure. 6) Plain skull x- rays, carotid angiograms were useful diagnostic methods but CT brain scan was thought to be the most accurate, noninvasive method which showed size of ventricle and effectiveness of shunting procedures with Evans'ratio. In enhanced CT brain scans, the basal cistern enhancement was the most common finding beside ventricular enlargement (64.1%). 7) Ventriculoperitoneal shunting was the most common procedure in this series. 8) The initial revision rate was 1270(19%) and the most of the revision was performed within 6 months after the initial shunting. 9) The revision rate in relation to shunting system and cerebrospinal fluid finding was not statistically significant. 10) The most common cause of the shunt malfuntion was obstruction of the ventricular catheter. 11) Forty one patients (58.6%) showed favorable outcome. The motality rate was 14/70(20%) and they were all belong to the stage 3. About half of the patients in stage 2 and stage 3 showed dramatic improvement after early shunting procedures. So the timing of operation was the most important factor influencing their outcome.

공간디자인 리포트 : 재난을 기회로: 영국 맨체스터의 도심재생 프로젝트

오성훈 대한지방행정공제회 2010 도시문제 Vol.45 No.505

뽕나무에서 추출한 단백질 분해효소의 특성

오성훈,장명숙,윤숙자 한국조리과학회 1997 한국식품조리과학회지 Vol.13 No.5

뽕나무는 옛날 가정에서 질긴 쇠고기를 조리할 때 사용하였다고 하였는데, 실제로 육류 조리에의 이용 가능성을 모색하기 위하여 우선 뽕나무 줄기의 속껍질에서 추출한 단백질 분해효소의 활성 및 특성을 알아 본 결과는 다음과 같다. 시료 2,800 g으로부터 조효소 분말 2.25 g을 회수하였는데, 회수율은 0.08%(wet basis)이었다. 뽕나무에서 추출한 단백질 분해효소 활성은 2,358 unit/g을 나타내었다. 효소의 특성 중 기질 특이성은 다른 단백질 기질에 대한 뽕나무에서 추출한 조효소의 효소활성을 조사해 본 결과 casein 100에 대하여 hemoglobin 44, collagen 34, egg white 20, gelatin 13의 비율로 가수분해하는 것으로 나타났다. 이 결과 뽕나무에서 추출한 조효소의 기질 특이성은 육류에 주로 함유된 단백질인 hemoglobin과 collagen을 비교적 잘 가수분해하는 것으로 나타났다. 뽕나무에서 추출한 조효소의 활성 온도는 30-60℃였고, 최적온도는 50℃로 나타났으며, 70℃ 이상의 온도에서는 그 활성이 급격히 감소하였다. 또한 pH를 달리한 역가 실험은 pH 5.0-7.0에서 안정하였고, 최적 pH는 6.0으로 관찰되어졌으며 8.0 이상의 pH에서는 그 활성이 급격히 떨어졌다. 또한 뽕나무에서 추출한 조효소의 단백질 함량은 7.2%였고, specific activity는 32.75 unit/㎎이었다. The purpose of this study was to investigate the properties of proteolytic enzymes extracted from mulberry (Morus alba L.). The protease activity of the enzymes from mulberry was 2,358 unit/g. The enzymes showed strong activities toward hemoglobin and collagen. The optimum temperature and pH of the enzymes were 50℃ and 6.0, respectively. The enzymes were stable at the temperature range of 30℃ to 60℃ and the pH from 5.0 to 7.0 for 1 hr at 37℃ of incubation and also retained whole activity after incubation for 1 hr at 60℃.

엔드밀 가공시 절삭력 신호와 공구마모에 대한 실험적 연구

오성훈,정봉수 한국기계기술학회 2001 한국기계기술학회 학술대회논문집 Vol.2001 No.-

춘계학술대회 : 본 연제 ; 색소 이상 질환 : 진피 멜라닌 세포증 증후군 1예

오성훈,황선욱,김영표 대한피부과학회 1985 대한피부과학회 학술발표대회집 Vol.37 No.1