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서울의 Penicillinase Producing Neisseria gonorrhoeae 발생빈도(1998)
김재홍,김준호,반재용,이정우,황성주,정준규,정성태,강진문,조흔정,홍창의,정혜신,이한승,김이선,이봉길,이종호,선영우,한기덕,윤성필,이성훈,안종성,박석범,문승현,조항래,김형섭,류지호,황재영,박준홍,손상욱 한양대학교 의과대학 2001 한양의대 학술지 Vol.21 No.1
In recent years, gonorrhea has been pandemic and remains one of the most common STDs in the world, especially in developing countries. For the detection of a more effective therapeutic regimen and assessing the prevalence of Penicillinase Producing Neisseria gonorrhoeae(PPNG), we have been trying to study the patients who have visited the Venereal Disease Clinic of Choong-Ku Public Health Center in Seoul since 1980 by menas of the chromogenic cephalosporin method. In 1998, 93 strians of N. genorrhoeae were isolated, among which 60(64.5%) were PPNG. The prevalence of PPNG in Seoul, which had been decreased to 39% in 1996 after a peak of 74.3% in 1993, is increased to 64.5% in 1998.
홍성란,이현절,정봉우,김춘영 全北大學校 1995 論文集 Vol.39 No.-
The production of gluconic acid by Aspergillus niger KCTC 2119 was studied. The Optimal culture conditions, such as initial pH, temperature, inoculum size and medium composition were established. Maximum overall gluconic acid productivity, 0.13g/L · hr was obtained when the cultivation was carried out at 33℃ and initial pH 5.5 for 72 hrs, with medium containing 110g/L glucose, 0.5g/L (NH_4)_2SO_4, 0.2g/L KH_2PO_4, 1.0g/L MgSO_4·7H_2O, and 0.1g/L corn steep liquor. The metabolic parameters such as specific growth rate, cell and gluconic acid yields were estimated for process improvement.
홍성욱,박중윤,김현수,박재현,박창용 金烏工科大學校 産業技術開發硏究院 1999 産業技術開發硏究 Vol.15 No.-
The present paper investigates the chatter stability of a milling spindle-workpiece system in face milling process. To this end, a new method using frequendy response function is adopted for predicting the chatter vibration. A compliant workpiece is used to make the spindle-workpiece system easily exposed to chatter vibration. The entire experimental procedure, including measurement of frequency response function and cutting coefficients, is demonstrated. The experimental result shows that the chatter stability prediction method using frequendy response function is of great use in face milling process.
홍성호,김성진,오현제 대한상하수도학회 2003 상하수도학회지 Vol.17 No.3
It is a well known fact that enhanced coagulation can effectively eliminate natural organic matter known as precursor of disinfection by-products. In the study, effect of the enhanced coagulation was investigated by isotherm, kinetic and molecular weight distribution on activated carbon adsorption. The strongly adsorbable fraction was not preferably removed by enhanced coagulation. This conclusion could be drawn by that K value and initial concentration did not show much difference. Therefore, the effect of the enhanced coagulation on isotherm was to reduce the initial concentration over the each adsorbable fraction. When the enhanced coagulation was adapted for pretreatment for activated carbon adsorption the operation period could be extended to 3 to 4 times. The dominant molecular weight (MW) fraction was less than 1,000 for all samples. In conventional coagulation MW bigger than 10,000 was effectively removed. In the enhanced coagulation MW smaller than 1,000 was preferably removed. It was observed that the strongly adsorbable fraction had very strong relationship with the MW less than 3,000.
제주시 일부 초, 중, 고등학생과 대학생들의 생체전기 저항법에 의한 체성분 조사
홍성철,이상이,현인숙 대한보건협회 2002 대한보건연구 Vol.28 No.2
Purpose : obesity is a frequent nutritional disorder in children and adolescent and its prevalence is increasing in Korea. The aim of this study was to measure body composition using bioelectical impedence in primaty, middle, high and college students in Cheju. Methods : We measured height, weight, and body composition(Fat %, WHR, Fat feee mass) by InBody 3.0 in 1,431 students aged 10-25 years. We also examined degree of obesity comparing standard weight for height, body mass index, and precent of body fat. Results : Fat free mass increased by aging in both sex, higher in male. Fat mass was highest in Primary school in male(12.09±4.86kg), college in female(16.03±4.22kg). Percent of body fat was highest in Primary student(21.64±8.02%), decreased middle(19.96±7.26%), high school(15.07±5.13%), and increased in college student(17.33±5.21%) in male, however, lowest in primary student(22.78±6.10%), increased by aging (middle;25.38±6.19%, high;27.61±5.27%, college;28.27±4.49%) in female. Percent of body fat was significantly higher in female except in primary school age. The prevalence of obesity based on fat % was highest in primary school student(primary, middle, high, college student; 33.3%, 23.3%, 7.6%, 8.2%) in male(≥25%), and highest in college student(11.1%, 26.6%, 32.3%, 38.6%) in female(≥30%), whereness, based on a standard weight for height(≥20%), 13.16%, 10.84%, 6.90%, 10.10% in male, 4.44%, 7.21%, 12.11%, 9.59% in female. Conclusion : It was necessary to evaluate obesity degree by body fat percentage, especially in adolescent and young female
치은섬유모세포 및 치주인대세포에 의한 교원질 수축에 관한 연구
홍영안,김현수,주성숙,신제원 慶熙大學校 齒科大學 1995 慶熙齒大論文集 Vol.17 No.2
The purpose of this in vitro study was to evaluate contraction of the human gingival and periodontal ligament fibroblast in the collagen matrix. The cell cultures were prepared using human gingiva and tooth. The collagen gels were observed daily with an inverted microscope and their area was determined by measuring the diameters of the collagen gel. The configurations of human gingival and periodontal ligament fibroblasts were done by SEM observation. The results as follows; 1. The contraction was found to be proportional to seeding cell without seeding cells, the contraction was not occured. 2. Periodontal ligament fibroblast was shown more fast contraction than gingival fibroblast. 3. The collagen matrix was translucent initially, but with fully contraction, the structure become opaque. 4. The collagen matrix with fibroblast were aggregated to form bundles and reorganized collagen fiber.
홍용,김현식,고유곤,홍동표,김성욱 한국공작기계학회 2008 한국공작기계학회 춘계학술대회논문집 Vol.2008 No.-
In this paper, gear system for Micro-press actuator parts is developed. The micro-press system consists of AC geared servo motor, gear system and high precision ball screw. Herein, the micro-press gear system not only forms the micro thin foil valve but also forms the hydro dynamic bearing for a high precision rotational equipment, we analyzed the transmitted power capacity of gear system and torque, angular velocity of ball screw, because we are to select the appropriate servo motor and then we apply result of analysis to the micro press system. For the next step, we plan to study for the development of forming speed for a productivity with high precision.
홍성욱,고명준,신영현,이득우 한국공작기계학회 2005 한국공작기계학회 춘계학술대회논문집 Vol.2005 No.-
This paper proposes a measurement method for the surface of micro-parts by using AFM(Atomic Force Microscope). To this end, two techniques are presented to extend the capacity of AFM. First, the measurement range is extended by using an image matching method based on correlation coefficients. To account for the inaccuracy of the coarse stage implemented in AFM's, the image matching technique is applied to two neighboring images intentionally overlapped with each other. Second, a method to measure the shape of relatively large specimen is presented by using the inherent trigger mechanism due to the atomic force. The proposed method is proved effective through a series of experiments.
홍현숙,김대호,이혜경,박재성,박성진,조준희,차장규,백상현 순천향의학연구소 2004 Journal of Soonchunhyang Medical Science Vol.10 No.2
We report seizure induced brain swelling in three patients. MRI revealed a cortical, subcortical(3/3), and basal ganglia(2/3) high signal intensity on T2- weighted and FLAIR images. The lesion shows low signal on T1-weighted image, and enhanced after contrast administration. Follow up study after 27 days in one case revealed complete resolution of the lesion. The reversible MRI findings may be the results of a local brain swelling, breakdown of blood-brain permeability, and a defect of cerebral autoregulation during seizure activity. The transient nature of such findings have to be considered in the differential diagnosis such as reversible ischemia, migraine, inflammation and infection.