신규 3작용성 메타크릴레이트의 치과용 광중합형 콤포짓트 레진용 단량체로서의 응용 연구

김중곤,정찬문,김민성,김광만,김경남 大韓齒科器材學會 2001 대한치과재료학회지 Vol.28 No.4

Tris[4-(2-hydroxy-3-methacryloxypropoxy)phenyl]methane(THMPM) was prepared easily from triphenylolmethane triglycidyl ether in good yield. As compared with composite resin formulated with difunctional bis-GMA, the physical properties of a newly developed composite resin formulated with trifunctional THMPM was evaluated. Cytotoxicity and acute toxicity of composite resin based on trifunctional THMPM evaluated according to ISO standard method. The depth of cure of the composite resin based THMPM was higher than that of the bis-GMA composite. There were no significant differences in flexural strength and water sorption between the composites resin based on THMPM and bis-GMA. The water-solubility value for the light-activated composite resins formulated with THMPM was much lower than that for a control bis-GMA composite. According to cytotoxicity evaluation, the composite resin based on THMPM showed very mild cytotoxicity with the response index of between 0/0 and 1/0. No acute toxicity of composite resin formulated with trifunctional THMPM was also observed. It is believed that THMPM is promising candidate for application as a photocurable dental composite resin.

트레드밀 걷기 운동 시 무게부하의 차이가 호흡순환기능 및 대사기능에 미치는 영향

김용규,이채산,김자영,박미숙,김광중,이광호 한국스포츠리서치 2003 한국 스포츠 리서치 Vol.20 No.1

The purpose of this study was to compare on cadiopulmonary and metabolism function of 10㎏ weight loading group(10 females) and W university students with non weight loading group(10 females. Each group did treadmill walking exercise for twenty minutes by the modified balke protocol. Heart rate(HR), systolic(SBP), MVO₂, and VO₂max were analyzed using 2×2(groups×during) repeated measures analysis of variance (MANOVA). And peak blood velocity(PBV) and MBV were analyzed by using 2×2(groups×during) repeated measures analysis of variance (MANOVA). Lactate and glucose were amalyed by separate 2×2 (groupxduring) analysis of variance(ANOVA). Results of this study suggest that: The change of HR, SBP and MVO₂ in experience and control group showed the significant(p<.05) increase during walking exercise. Variables between experience and control group showed not significant level. But VO₂ in each group showed the significant(p<.001) increase during walking exercise. Differenc among each group showed significant(p<.001) level. Lactate and glucose level in each group showed significant(p<.001, p<.05) increase during walking exercise. Differences among each group showed not significant level. PBV and MBV in each group significant(p<.001) increase during walking exercise. Difference among each group showed significant(p<.05) level. According to these results, weight loading walking exercise considering safety promotes to cardiovascular function and it is expected to be an effective exercise methods able to improve the physical inefficiency of long time walking type.

치아 수복용 불소함유 glass filler의 제조 및 특성

김대성,최세영,김경남,김광만,김중곤 대한치과기재학회 1998 대한치과재료학회지 Vol.25 No.3

The purpose of this study was the reaching test of restorative glass according to composition. Mixtures of SrF₂, CaF₂and SiO₂were fused in platinum crucible. The glasses were ground and fraction which passed through a 400 mesh (38㎛) sieve were collected. The powder specimens were analyzed by a DTA and XRD. Then powder specimen were inserted to D. I. water with various of dissolution time and composition at 37℃. Fluoride ion, cation release, solubility, and pH change were estimated. It was clear that the glasses were formed except S0.65. In S0.40, Tg, Ts, and Tc were 630, 672, and 813℃ respectively. In initial 0.5 hrs., amounts of released fluoride ion and cation were about 90% of total released amounts and released rate was decreased with dissolution time. Amount of released fluoride ion and cation were increased with decreasing SiO₂ in glass filler. And released rate was decreased rapidly by adding CaF₂. This was caused by structural variation in glass filler. Solubility was similar tendency with ion released. The pH of D.I. water was 4.5. But in intial 0.5 hrs., pH was 8.2∼9.8., and decreased according to dissolution time. This is caused by ionic changing with cation and H* ion.

종설(綜說) : 한의학 학술지에 발표된 탈모에 관한 연구현황 분석

김광중 ( Kwang Joong Kim ),백승엽 ( Seung Yeob Baek ),임채광 ( Chae Kwang Im ) 대구한의대학교 제한동의학술원 2012 東西醫學 Vol.37 No.4

We performed a systemic analysis of the research situations on hair and alopecia published in the journal of oriental medicine to understand the search trend in the area of hair and alopecia, prepare the basis for the interests and basis on hair and alopecia in the oriental medicine area and above that, to support for the applications in the clinics through this and came to the following conclusions. 1. There are total 95 publications in the domestic journals of oriental medicine area from 1986 to 2011. 2. Total 95 articles were published in 23 journals. “Dong-eui journal of physiology and pathology” had the largest number of articles which was 22(23%) followed by “Oriental journal of ophthalmology, otolaryngology, and dermatology” of 19(20%). 3. The authors who published the largest number of articles as the first author were “Cheon-jong Kim”, “Hyeon-taek Shin”, and “Tae-hu Lee” who published 3 each, and the correspondent author who published the largest number of articles was “Chang-hyeon Lee” who published 8 articles. 4. For the contents and methodologies of the study, there were 16 literature reviews, 36 clinical trials, and 43 animal and other experimental studies and 3 literature reviews were published in 2002, 6 animal and other experimental studies were published in 2006, and 6 clinical trials were published in 2004, 2006, 2009, and 2010 each the most. Based on this study, we hope not only scientific treatises but also these for the oriental medicines and alopecia study related to the oriental medicines to be continued.

勿劑 安義에 대한 考察

金光重 又石大學校 1988 論文集 Vol.10 No.-

木浦·長興地方의 降雨强度式 誘導

金雲中,池光一,鄭南先 朝鮮大學校 建設技術硏究所 1999 建設技術硏究 Vol.19 No.1

In hydrology, rainfalls apply to mean every type of rains which were dropped from clouds and condensed into waters. While the rains made from during the condensing process are studied in meteorology, the raindrops on the ground are the subject of hydrology. For background knowledge, this study has collected research materials and data on rainfalls for 20years in Mok-Po and Chang-Hung. Then, by surveying the existing articles and analysing experimental records, this paper tried to predict the accurate amount of the rainfalls for the limited time. The methods used for foretelling rainfalls optimal probability are as follows; Normal Distribution Methods, Log Normal Distribution Method, Moment Method, Gumbel-Chow Method, Iwai Method are applied. The methods for significant statistic results are as follows; Talbot, Sherman, Japanese and Semi-log are used. The computer was used to figure out the invariable number for the methods while the most proper formula was selected through comparing χ ²-test number and standard reduction rate. The formulas for rainfall optimal probability are as follows; In Mok-Po, Normal Distribution Method is used for 3, 5, 10, 200 years and Gumbel-Chow is taken into account for 20, 30, 50, 100 years. In Chang-Hung, Gumbel-Chow was used for 3 years and thanks to the smallest error, Iwai was used for more than 5 years. After comparing standard error with χ ²-test number, Japanese was appropriate in Mok-Po for 3, 5 years and Sherman for over 10 years. In Chang- Hung, Japanese was most useful from 3 to 20 years and Sherman for over 30 years. In this study, the formulas suggested for optimal probability have 97.24% significancy for Mok-Po and 97.83% significancy for Chang-hung. Therefore, the offered formulas are meaningful to consider in constructing hydrological buildings in that they have higher optimal probability than the existing ones and they have similar predictive results with ones by meteorological observatory. The formulas offered in this study are expected to have significancy according to rainfall frequency, rainfall duration and rainfall intensity. Furthermore, they have useful value related with I.D.F correlation.

복강경하 대장절제술을 시행 받는 환자에서 라모세트론과 온단세트론외 술 후 오심 및 구토 예방 효과 비교

김효중;어전영;어근무;어정한;엄세훈;조광래;김명훈 인제대학교 2011 仁濟醫學 Vol.32 No.-

Objectives : We evaluated the efficacy of ramosetron and ondansetron for preventing postoperative nausea and vomiting (PONV) in laparoscopic colectomy. Methods and Materials : Eighty patients who received laparoscopic colectomy were randomly divided into two groups: R group (ramosetron 0.1mg PO) and O group (ondansetron 4mg twice IV). Injection or oral medication was administered before the induction of anesthesia in each group. Injection was administered at the end of surgery in O group. General anesthesia was induced using propofol and rocuronium, and maintained with sevoflurane, remifentanil and air (FiO2 0.5), We investigated the incidences of PONV in each group by the Rhodes index of nausea, vomiting and retching (RINVR) at postoperative 6 and 24 hours. Results : The incidence of PONV was not different between group at each time points after surgery (at postoperative 6 hours: 20% in group R, 17.5% in group 0, at postoperative 24 hours; 12.5% in group R, 7.5% in group 0). There was no difference in the severity of PONV, satisfaction, rescue drug usage. Conclusion : Prophylactic therapy with ramosetron is as effective as conventional prophylactic therapy with ondansetron for preventing PONV in general anesthesia for laparoscopic colectomy.

Pseudomonas sp. TPP 63을 이용한 PVA 폐수의 생물학적처리에 관한 연구

김영식,조상원,오광중,임주원 부산대학교 환경문제연구소 1994 環境硏究報 Vol.12 No.-

The purpose of this study is increasing the microbiological treatment efficiency of PVA wastewater using selected bacteria. The bacteria which showed high decomposition rate of PVA was separated as TPP 63 bacteria decomposing PVA of 91.3% when the bacteria have cultured at 0.5% PVA minimum culture medium for 5 days. This bacteria was identified as Pseudomonas putida. It showed a maximum decomposition rate of PVA at culture temperature of 37℃ and pH 7.5-7.8. In case 0.2% PVA wastewater was treated with this culture of 3500 mg/L MLSS, the efficiency was improved with increasing HRT. At HRT of 5 days and 0.4% PVA concentration, the treatment efficiency was dropped down more seriously when the culture medium was not supplied.

국내 주요 호수의 육수학적 조사(4): 주암호

김범철,박주현,허우명,임병진,황길순,최광순,최종수 江原大學校 附設 環境硏究所 2001 環境硏究 Vol.18 No.-

In this study limnological characteristics of Lake Juam was surveyed from June 1993 to May 1994 in order to provides important information regarding water resources. Seschi disc transparency, epilimnetic chlorophyll a(chl-a), tatal nitrogen(TN), total phosphorus(TP) concentration and primary productivity were in the range of 2.0~4.5 m, 0.9~13.6 mgChl/㎥, 0.78~2.32N/l, 11~56 mgP/㎥, 270~2,160mgCm^(-2)day^(-1), respectively. On the basis of TP, Chl-a and Secchi disc depth, the trophic state of Lake Juam can be classified as mesotrophic lake. The phosphorus inputs from non-point sources are concentrated in heavy rain episodes during the monsoon season. As a result, phosphorus concentration are higher in summer than in winter. TP loading from the watershed were estimated to be 0.9 gPm^(-2)yr(-1), which correspond to a boundary of the critical loading (1.0 gPm^(-2)yr(-1), which correspond to a boundary of the critical loading (1.0 gPm^(-2)yr(-1)) for eutrophication. From the results of the algal assay, both phosphous and nitrogen act as limiting nutrients in algal growth. The seasonal succession of phytoplankton community structure in Lake Juam was similar to that observed in other temperate lakes. Diatoms(Asterionella formosa and Aulacoseira granulata var. angustissima) were dominant in spring and winter, cyanobacteria (Microcystis aeruginosa, M. sp. and M. viridis) were dominant in warm season. The organic carbon, nitrogen and phosphorus content of lake sediment were 9.5~14.0 mgC/g, 1.01~1.82 mgN/g, and 0.51~0.65 mgP/g, respectively. The allochthonous organic carbon loading from the watershed and autochthonous organic carbon loading by primary production of phytoplankton were determined to be 1,122 tC/yr and 6,718 tC/yr, respectively. To prevent eutrophication of Lake Juam, nutrient management of watershed should be focus on reduction of fertilizer application, proper treatment of manure, and conservation of topsoil as well as point source.

차세대 무선 통신 시스템을 위한 안테나 신기술

김형락,권세웅,황광선,윤영중 延世大學校 電波通信共同硏究所 2002 電波通信論文誌 Vol.6 No.1

차세대 통신 시스템에서 공통적으로 요구하는 소형화, 광대역화, 집적화추세에 따라 RF소자는 광대역화, 소형화, 집적화를 향해 발전하고 있으며 안테나 기술도 현재 추세에 발맞추어 소형화, 능동집적화, 광대역화를 통하여 개발 방향을 모색하고 있다. 본고에서는 현재 추세인 소형 안테나, 능동 안테나와 더불어 최근 관심이 집중되고 있는 임펄스 통신에 이용될 수 있는 초광대역 안테나 기술에 대해 소개한다. The technical trends of the next generation wireless communication are miniaturization, broad-band operation, and integration. Thus, in accordance with this trend, RF devices and components are being developed in such way, and same with the antenna. In this paper, technology of small antenna, active antenna, and ultra wideband antenna, which can be applied to impulse communication system, are introduced.