한국인 두피의 조직학적 층에 관한 형태계측학적 연구

서중석,김대중,김호덕,라봉진 대한해부학회 1995 Anatomy & Cell Biology Vol.28 No.4

Chloroprene rubber latex의 MMA graft 중합

김동민,이봉재,한병학,김형중 公州大學校 工學硏究院 生産技術硏究所 2003 論文集 Vol.11 No.-

The graft polymerization of chloroprene rubber(CR) latex with methyl methacrylate(MMA) was carried out by using a water soluble radical initiator, potassium persulfate(KPS). The reaction was executed with different solid content of CR latex and weight ratio of MMA to initiator at the same temperature, 80℃. The identification and characterization of MMA grafted CR latex were achieved with FT-IR spectrum using an absorption band at wave number 1732㎝^(-1) assigned for carbonyl(C=O) group of MMA. After the graft polymerizations, average particle sizes of reactants were measured. In addition adhesion strengths were tested with SBR and cotton denim using 180^(o) peel test method. Consequently, it has been found that the direct graft polymerization of MMA to CR latex was successful achieved and affected by amount of MMA and weight ration of initiator to monomer, and solid content of CR latex significantly.

大豆의 利用에 관한 硏究 : Ⅲ. 大豆PROTEIN-LIPID FILM의 性質에 관하여

金中晩,朴鶴封 圓光大學校 1981 論文集 Vol.15 No.1

대두protein-lipid film을 제조하여 그의 용해성(solubility), 팽윤성(swelliug power) 그리고 packaging properties을 조사하였는데 그 결과를 요약하면 다음과 같다 1. 대두protein-lipid film은 9.20%의 수분, 51.36%의 초단백질, 25.61%의 조지질, 9.57%의 total sugar 그리고 4%의 회분으로 구성되어 있다. 2. 대두protein-lipid film은 PH2-4에서 최저 팽윤도를 나타내 며 PH13~PHI4 사이에서 뚜렷한 용해 현상을 나타냈는데 이런 경향은 온도가 높아질 때 증대되었다. 3. 대두protein-lipid film은 김밥을 만들 때 김을 대체할 수 있으며 jelly, Sugar ball을 포장할 수 있는 가식성포장재로써의 적성을 가지고 있다. The property of soybean protein-lipid film was investigated and obtained following results; 1) Soybean protein-lipid film(dried at 50℃) contain moisture, crude protein, crude lipid total sugar and ash, 9.20%, 51.36%, 25.61%, 9.57%, 4%, respectively. 2) Soybean protein-lipid film showed maximum swelling rate in PH2-PH4, solubile in PH13-PH14 and according to temperature increase both were increased. 3) Soybean protein-lipid film have properties of packaging material of jelly, kim-bab and sugar ball.

酸化리튬의 置換에 따른 硼硅酸유리의 分相에 關한 硏究

金鳳杰,梁重植 慶熙大學校 1980 論文集 Vol.10 No.-

The phase separation of low-alkali borosilicate glass with the composition of 6.25 Na_2O·18.75 B_2O_3· 75.00 SiO_2 (mole%) substituting Li_2O for Na_2O was studied. The phase separation in the temperature range of transformation was examined with various heating temperatures and soaking times. Durability to water, thermal expansion, specifie density and visible light transmittance of the specimen were investigated and the microstructure of the separated phase was also observed by transmission electron micrograph techniques. The maximum alkali extraction result with he best phase separation effect was obtained when Na_2O of the base glass was replaced with 1.88 Li_2O (mole %) and electron micrograph of carbon film replica of 1.88 Li_2O·4.37 Na_2O·18.75 B_2O_3·75.00 SiO_2 (mole %) glass showed that glass consisted of homogeneous two phases. The minimum specific density was shown with the specimen treated at 570℃ and it was also shown that the longer the treating time the lower the specific density. The apparent activation energies of approximately 45 Kcal/mole by the alkali extraction and 43Kcal/mole by the thermal expansion method were derived from the Arrhenius plots, respectively.

두경부에 발생한 방선균증 3예

홍석중,주준범,김용재,이봉재 대한이비인후과학회 2000 대한이비인후과학회지 두경부외과학 Vol.43 No.11

SOL-GEL法에 依한 LAS系 結晶化유리의 製造에 있어서 租成比유리의 特性에 미치는 影響

김봉걸,양중식,조훈성,권창오,박경호 慶熙大學校 材料科學技術硏究所 1990 材料科學技術硏究論集 Vol.3 No.-

The purpose of this study is to investigate into the physical properties of Li₂O-Al₂O₃-nSiO₂ (LAnS) system of crystallized glass prepared by sol-gel method according to the composition ratio of LAnS. In order to find the crystallization temperature as well as the state of crystalline, differential thermal analysis and X-ray diffraction analysis were examined. The results obtained are as follows : 1. Gelling time became longer as increasing the composition ratio of SiO₂ and also found that it became faster as increasing the additive amount of water. Also, additive amount of water required for the gellation was above four times of the theoretical amount of water required hydrolysis. 2. Surface area and mean pore size became larger as increasing the composition ratio of SiO₂ and for LA4S dried gel, surface area was 331.1m^(2)/g, mean pore size distributed about 5nm and 30-50nm. 3. The crystallization temperature is high as increasing the composition ratio of SiO₂ and for LA4S, crystallization temperature is 800℃. Also, LA4S formed at 800℃ for the crystalline phase of β-eucryptite and at 900℃ for crystalline phase of β-spodumene.

서울지역에서의 VOCs 오염원 기여도 추정에 관한 연구

봉춘근,윤중섭,황인조,김창녕,김동술 한국대기환경학회 2003 한국대기환경학회지 Vol.19 No.4

A field study was conducted during the summer time of 2002 to determine compositions of volatile organic compounds (VOCs) emitted from vehicles and to develop source emission profiles that is applied to CMB model to estimate the source contribution of certain area. Source emission profile is widely used for the estimation of source contribution by the chemical mass balance model and have to be developed applicable fur the large1 area of estimation. This study was aimed to develop source emission profile and estimation of source contribution of VOCs after application of the chemical mass balance (CMB) receptor model. After considering the emission inventory and other research results for the VOCs in Seoul, Korea, the sources like vehicle emission(tunnel), gas station (gasoline, diesel), solvent usage (painting operation, dry cleaning, graphic att), and gas fuels were selected for the major VOCs sources. Furthermore, ambient air samples were simultanceusly collected from 09:00 to 11:00 for four days at eight different official air quality monitoring sites as receptors in Seoul during summer of 2001. Source samples were collected by canisters, and then about seventy volatile organic compounds were analyzed by gas chromatography with flame ionization detector (GC/FID). Based on both the developed source profiles and the database of the receptors, CMB model was intensively applied to estimate mass contribution of VOCs sources. Examining the source profile from the vehicle, the portion of alkanes of VOCs was highest, and then the portion of aromatics such toluene, m/p-xylene were followed In case of gas fuel, they have their own components: the content of butane. propane. ethane was higher than any other component according tn the fuel usage. The average of the source apportionment on VOCs for 8 sites showed that the major sources were vehicle emission and gas fuels. me vehicle emission source was revealed as having the highest contribution with an average of 49.6% and followed by solvent with 21.3%, gas fuel with 16.1%, gasoline with 13.1%.

溫室保溫커튼의 材料特性에 따른 保溫效果分析

金榮福,金容換,李昇揆,金成泰,羅又禎,閔永鳳,朴重春,崔東烈 慶尙大學校 1991 論文集 Vol.30 No.2

The effects of the material properties of thermal curtains upon reduction of the greenhouse heat loss were studied. A theoretical analysis procedure with equations and computer programs was developed to estimate them by using energy balance principles. Curtain effectiveness for every three kinds pf value level of the material properties were studied and compared. The results of this study would be useful for the developent and management of greenhouse thermal curtains.

생쥐모델에서의 망막모세포종 안구 자기공명분광법과 병리소견 : 초기경험

김동훈,김일중,양재한,김정훈,유영석,이봉재 朝鮮大學校 附設 醫學硏究所 2007 The Medical Journal of Chosun University Vol.32 No.1

Purpose: To show various MR spectroscopy and correlated pathologic images of retinoblastoma in nude mouse with a new human retinoblastom cell line (SNUOT-Rbl) which innoculated into intravitreous cavity. Materials and Methods: The established cell line was innoculated into mtravitreous cavity of 14 eyeballs of 7 mice and a transplanted retinoblastoma was examed for 1 month. Tl-weighted image (T1WI), T2-weihgted image (T2WI), and MR spectroscopy were obtained with 1.5 Tesla MRI (Magnetom Vision, Siemens, Erlangen, Germany) and 4.7 Tesla MRI (Bruker, Medizintechnik GmbH, Karlsruhe-Ettlingen, Germany). After scanning, eyeballs were extracted and hematoxylin & eosin stained specimens were examined with the microscope. We compared MR spectroscopy with pathologic findings and evaluated characters of tumors. Results: Innoculated cells into eyeball of mice grew retinoblastoma (8/14, 57%). Eyeball with retinoblastoma protruded externally and showed focal hemorrhage. Tumors showed low (n=3), iso (n=4), high (n=1) signal intensity on TIWI, low (n=5), iso (n=1), high (n=2) signal intensity on T2WI, and well enhancement (n=8) with contrast, Involvement of optic nerve was suspected by MRI and confirmed by pathology (n=1). Conclusion: We could demonstrate MR spectroscopy of transplanted retinoblastoma by new tumor cell line in vivo. This imaging technique facilitate molecular imaging investigation of retinoblastoma.

맥킨리, 메인호, 그리고 미서전쟁의 기원

김봉중 전남사학회 2002 역사학연구 Vol.19 No.-

The origins of the Spanish-American War has long attracted scholars' interest. Given the fact that the United States began to put the traditional isolationism behind and adopt internationalism through its experiences of the Spanish-American War, there is no question about the historical value of the topic, the origins of the war. Scholars have approached the topic with many different angles and perspectives. Some looked for 'long-term' causes of the war, others for 'short-term' or immediate causes. Some put their emphasis on both outer and domestic conditions in the late nineteenth century to conclude the outbreak of the war as an inevitable result of the time in history. Others, mostly new historians who follow postmodernism, has brought race and gender in their interpretations of the topic. One cannot denounce the values of the various interpretations of the origins of the war. They brought many different insights on the time when the Spanish-American War occurred. However, scholars tend to forget the central question, 'why did the war come about in 1898?' This article tries to readdress the question, why war occurred in 1898?,by focusing on some immediate events that led the country to the war. In doing so, two things are scrutinized: William Mckinley and the explosion of the Maine. The paper concludes that President Mckinley believed in the traditional isolationism and wanted to the nation away from the Cuban crisis, the most important overseas problem the nation had faced since his election to the presidency. Most of the American people were sided with Mckinley in dealing with the matter. The explosion of the battleship Maine in February 1898, however, turned the public sentiment around in favor of America's intervention in Cuba even it would mean a war with Spain. By early April, 1898, Mckinley got in a position where he could no longer put off the war fever of the nation.