Periapical multilocular osteoporotic bone marrow defect

Jung, Yun-Hoa,Cho, Bong-Hae,Nah, Kyung-Soo 대한구강악안면방사선학회 2005 Imaging Science in Dentistry Vol.35 No.4

A case of osteoporotic bone marrow defect, which appeared as a well-defined multilocular radiolucency overlapping the roots of mandibular right second molar, was reported. On periapical radiograph, a daughter cyst-like radiolucency was seen at the anterior margin of the lesion making it difficult to rule out odontogenic keratocyst.

목탄분말의 원료수종이 양파 생육과 토양 이화학성에 미치는 영향

윤봉기,박인진,유영권,허원영,김병운,김용웅 한국국제농업개발학회 2004 韓國國際農業開發學會誌 Vol.16 No.3

양파재배 토양에서 토양개량용으로 적합한 목탄의 원료 수종을 선발하기 위해서 관행(무처리)과 코코넛피트, 대나무, 참나무, 활엽수 수피, 소나무로 만든 목탄분말의 6처리로 시용량 500㎏· 10a^(-1)으로 하여 2002년에 시험한 결과는 다음과 같다. 1. 시험에 사용한 5종 목탄의 pH는 5.1~10.1, T-N 0.15~0.71%, P₂O_(5) 2.06~2.65%, K₂O 0.20~0.86% 범위였으며 1 ㎜이하 입자의 분포는 9.0~84.8%이었다. 2. 양파의 생육은 목탄시용으로 줄기직경이 크고 주당 엽수가 많은 경향이었으며 참나무, 활엽수 수피, 대나무 목탄처리 구에서 생육이 좋았다. 양파의 수량은 4,631~5,114㎏ 10a^(-1)으로 무처리(4,638㎏)에 비하여 구고가 크고 구중이 무거운 참나무목탄과 활엽수 수피 목탄처리구에서 각각 10%, 소나무 목탄구에서 3% 증수되었으며 유의성이 인정되었다. 3. 시험 후 토양의 물리성은 목탄 시용으로 용적밀도와 토양의 고상비율이 줄어들 고 액상과 기상, 공극율이 증가하는 경향을 보였다. 화학성은 코코넛 피트처리구 를 제외한 처리구에서 토양 pH가 개선되었고, OM, CEC 는 모든 처리구에서 증가하는 경향을 보였다. This experiment was conducted to find out moderating tree kinds of wood charcoal pow-der for soil improvement and onion growth in 2002 year. The wood charcoal materials were coconut peat, bamboo, black oak, pine, and broadleaf tree bark. Wood charcoal application rate was 500 ㎏ 10a^(-1). Results were summerized as follows; Chemical properties of wood charcoal used experiment were pH 5.11~10.1, T-N 0.15~0.71%, P₂O_(5) 2.06~2.65% and K₂O 0.20~0.86%. The particle size of <0.1 ㎜ was 9.0~84.8%. Onion growth of plot applied wood charcoal was better than that of plot not applied wood charcoal. The number of leaf and diameter of stem at plot applied wood charcoal was better than that of plot not applied wood charcoal. Growth of plot applied black oak charcoal, broadleaf tree bark char-coal, and bamboo charcoal was better than that of any other plot. Yield of plot applied wood charcoal was 4,631~5,114 ㎏ 10a^(-1). The yield of plot applied black oak charcoal, broadleaf tree bark charcoal and pine charcoal was increased 10, 10, 3% than that of control(4,638 ㎏ 10a^(-l)), respectively. It was significant at 5% level. Soil physical properties of after experiment was decreased bulk density and solid phase, but liquid phase, air phase and porosity were increased than that of control. Soil chemical properties of after experiment trend to be improved pH. Soil OM and CEC was increased than that of control.

건축물 고형시료 중 석면 분석을 위한 방해 물질 제거방법에 대한 연구

김윤재,임지현,장봉기 순천향대학교 기초과학연구소 2021 순천향자연과학연구 논문집 Vol.27 No.1.2

In this study the following pretreatment methods are proposed using solid samples of buildings : furnace ashing methods according to the existing waste process, acid treatment after furnace ashing, acid treatment using graphite block acid circulation, a new method of attempting. This study propose a method for pretreatment of solid samples in buildings containing asbestos with a comparison of the asbestos analysis obstruction removal rates according to the above mentioned methods. The materials used in this study are 48 slates of 3 types and 48 textures of 3 types, total 96 samples which are solid samples in buildings. Pretreatment and acid treatment methods were classified in four ways: Electric high temperature furnace ashing methods according to the existing waste process and acid treatment with HCl(1+3)(Group A), Electric high temperature furnace ashing methods and acid treatment with aqua regia(HCl 3 : HNO3 1)(Group B), acid treatment with aqua regia(Group C) using graphite block acid circulation, a new method of attempting and acid treatment with inverse aqua regia(Group D). The removal rate of furnace ashing from slate samples in A and B treatment groups was 13.91%, and the removal rate of furnace ashing from texture samples in A and B treatment groups was 9.21%, so the removal rate of furnace ashing from slate samples was significantly higher than texture samples(p<0.001). The removal rate of asbestos analysis interfering substances from slate samples and texture samples in C treatment group with acid treatment with aqua regia using graphite block acid circulation were 30.50% and 30.58%, respectively. So in both slates and texture samples, the removal rate of asbestos analysis interfering substances from the slates and texture samples of A, B, and D treatment groups was significantly higher(p<0.001). The newly proposed acid treatment with aqua regia using graphite block acid circulation method in this study significantly eliminated more acid solubility material and asbestos analysis interfering substances than electric high temperature furnace ashing methods according to the existing waste process and acid treatment with HCl(1+3), and this method does not go through the process with high temperature furnace ashing, it is believed that asbestos analysis can be made easier by preventing changes in the characteristics of asbestos and the use of graphite block acid collection devices when acid treatment of solid samples in buildings containing large amounts of asbestos analysis interfering substances can be more effective than conventional methods.

목탄분말의 입자크기가 양파 생육과 토양 이화학성에 미치는 영향

윤봉기,박인진,유영권,허원영,김병운,김용웅 한국국제농업개발학회 2004 韓國國際農業開發學會誌 Vol.16 No.3

토양개량용으로 적합한 목탄의 입자크기를 구명하기 위하여 양파 재배 토양에서 참나무 목탄분말과 소나무 목탄분말의 입자크기를 각각 1 ㎜이하, 1~5㎜, 5~10㎜의 3처리로 하여 목탄분말을 500㎏/10a 수준으로 사용하고 2001년에 시험 한 결과는 다음과 같다. 1) 시험에 사용된 목탄의 화학적 특성은 참나무 목탄은 pH10.1, T-N 0.04%, P₂O_(5) 1.63%, K₂O 0.34%이었으며 소나무 목탄은 pH 9.3, T-N 0.24%, P₂O_(5) 2.18%, K₂O 0.33%이었다. 2) 수확기의 양파 생육은 초장 50.0~62.6㎝, 엽수 6.0~6.5매, 줄기직경 11.2~16.4㎜이었으며 1 ㎜이하 크기의 목탄 시용구에서 초장. 염수, 줄기직경 등 생육이 좋았다. 3) 목탄 입자크기에 따른 수량 구성요소는 1 ㎜이하 시용 구에서 구고. 구 직경, 구중 등이 좋았으며 수량도 목탄 입자크기 1 ㎜이하 시용구에서 많았다. 4) 시험후 토양 화학성은 토양 pH 5.9~6.3, OM 14.7~15.5 g ㎏^(-1), CEC 15.6~16.8 c㏖^(+)㎏^(-1), Avail. P₂O_(5) 147~186㎎ ㎏^(-1), Exch. K 0.35~0.41c㏖^(+) ㎏^(-1)으로 시험전 토양에 비하여 OM, CEC가 증가하고 Avail. P₂O_(5), Exch. K의 축적이 경감되었다. 5) 시험후 토양의 물리성은 용적밀도 1.20~l.24g ㎝^(-3), 고상 45.1~46.6%, 공극율 53.4~54.9% 이었으며 목탄 입자크기 1 ㎜이하 시용구에서 좋아지는 경향이었다. 6) 시험후 토양의 미생물상은 세균 64.3~200.4(×10^(5))cfu g^(-1),방선균 26.4~70.3(×10^(5)), 사상균 16.9~186.2(×10³))이었으며 <1㎜, 1~5㎜ 크기의 목탄 시용구에서 세균, 방선균, 사상균이 많은 경향이었다. This experiment was conduct to find out moderating particle size of wood charcoal powder for soil improvement in 2001 year. The wood charcoal material was a black oak and pine. The particle size of wood charcoal was 1㎜ below, 1~5 ㎜ and 5~10 ㎜. An amount of wood charcoal application was 500 ㎏ l0a^(-1), Chemical properties of a black oak charcoal used experiment was pH 10.1, T-N 0.04%, P₂O_5 1.63% and K₂O 0.34%. That of pine charcoal was pH 93, T-N 0.24%, P₂O_(5) 2.18%, K₂O 033%. At harvest stage of onion, plant height was 50.5~62.6㎝. The number of leaf was 6.0~6.5ea. Stem diameter was 11.2~16.4 ㎜. Plant height, the number of leaf and stem diameter of plot treated 1 ㎜ below wood char-coal were be longer, more or bigger than those of any other particle size. Onion height, diameter and weight of plot treated 1 ㎜ below wood charcoal was higher or bigger than that of any other particle size. Yield was similar to yield component. Soil chemical properties of after experiment was pH 5.9~63, OM 14.7~15.5 g ㎏^(-1), CEC 15.6~16.8 c㏖^+ ㎏^(-1), Avail. P₂O_(5) 147~486 mg ㎏^(-1) and Exch. K 035~0.41 c㏖+ ㎏^(-1). OM and CEC was increased than that of before experiment. Avail. P₂O_5 and Exch. K was decreased than that of before experiment. Soil texture after experiment was bulk density 1.20~4.24 g ㎝^(-1), solid phase 45.1~46.6%, porosity 53.4~54.9%. Soil texture was trend to be improved by l㎜ wood charcoal. Soil microflora after experiment bacteria 64.3~200.4(×10^(5))cfu g^(-1) actinomycete 26.4~70.3(×l0^(5))cfu g^(-1) and fungi 16.9~186.2(×10³)cfu g^(-1) Bacteria, actinomycete and fungi was much at plot treated with <1 ㎜, 1~5 ㎜ wood charcoal with out relation to wood charcoal material.

CNC LATHE 성능개선을 위한 검사방법에 대한 연구

김봉훈,윤재웅 대구대학교 산업기술연구소 2009 産業技術硏究 Vol.20 No.1

An experimental investigation was conducted to analyze the effect of geometric structure of CNC lathe on the accuracy of machined work pieces. First, a detailed data base for summarizing inspection methods and items was made through literature reviews on the related standards and inspection guide lines. Secondly, performance tests were performed using a test equipment corrected according to the inspection guide lines. Results showed that accuracy of the work pieces was well controlled and satisfied geometric tolerances of the inspection guide lines proposed in this paper.

국가독점자본주의의 기제와 위기

尹龍熙,姜鳳求 경북대학교 1987 社會科學 Vol.6 No.-

State intervention in monopoly capitalism has two main reasons: firstly, monopoly capitalism is faced with crisis of capital accumulation because of fundamental contradiction between socialization of production and private ownership, and secondly, the domination of monopoly capital is becoming fragile, since economic confrontation has shifted to political realm owing to new antagonistic relation between classes. Social integration and capital accumulation is two essential functions of state intervention in state monopoly capitalism, but whatever policy the state in a capitalist society may choose, that is ineffective in view of legitimization and capital accumulation. In state monopoly capitalism, the politicization of economic struggles requires labor class to get into political arena, that is to say, social relation is reproducted so that class struggle may be carried out within boundary of the mode of production. The development of state monopoly capitalism is likely to accelerate political movement and resistance of anti-monopoly bodies, and bourgeois democracy faces attack of the working class masses because of its bias against labor class. Crisis of state monopoly capitalism and democratic change could depend upon whether labor class recognizes necessity of fundamental change and how antimonopoly democratic bodies unite their powers.

군 훈련병의 스트레스, 성인 주의력결핍 과잉행동장애 증상과 자살사고의 연관성에 관한 연구

이동윤,이철순,박철수,손진욱,김봉조,차보석,이소진 대한생물치료정신의학회 2011 생물치료정신의학 Vol.17 No.2

Objectives:This study is conducted to investigate the effect of Attention Deficit and Hyperactivity Disorder(ADHD) symptoms on stress and suicide idea among 224 conscripts. Methods:Total number of subject is 224 conscripts. We evaluate symptoms of adult ADHD with Korean-Wender Utah rating scale(K-WURS) and Korean adult attention-deficit/hyperactivity disorder scale(K-AADHDS), stress with Brief Encounter Psychosocial Instrument-K(BEPSI-K), suicide idea with Scale for suicide ideation(SSI) after basic military training. Multivariate logistic analysis with backward stepwise selection is performed to evaluate risk factors of stress. Multiple linear regression analysis with stepwise selection is performed to evaluate association of suicide idea with adult ADHD symptoms. Results:Stress is significantly associated with K-WURS score, K-AADHDS score and SSI score(p<0.01, p<0.05, p<0.01). K-WURS score are significant risk factor of stress after basic military training(p<0.05, O.R : 1.034, 95% CI : 1.005-1.065). And K-WURS score influence suicide idea after basic military training(p<0.05, β : 0.031). Conclusion:The result suggests that K-WURS score might be a risk factor of stress and could affect suicide idea.

남부 평야지 자운영재배답에서 논유형과 질소수준이 벼 생육 및 토양 화학성에 미치는 영향

윤봉기,김병호,이인,최형국,박인진,김용웅 한국국제농업개발학회 2003 韓國國際農業開發學會誌 Vol.15 No.3

녹비작물로서 자운영을 재배한 논에 벼를 재배할 때 질소비료의 절감기준을 구명하고자 평야지인 전남 나주의 보통답과 사질답에서 관행, 자운영+질소 70%, 자운영+질소 50%, 자운영+질소 30%, 자운영+무질소의 5처리로 1999년부터 2001년까지 3년동안 시험한 결과는 다음과 같다. 1. 자운영의 개화성기 생육은 초장 43.6~43.9㎝, 생초중 21.79~24.99Mg ha^(-1)이였으며 무기성분 함량은 T-N 2.40~2.64%, P₂O_(5) 0.42~0.46%, K₂O 1.83~2.01%였다. 자운영의 생육은 보통답이 사질답에 비하여 생초중이 많았고 T-N, T-C, P₂O_(5), CaO, MgO의 함량도 높았다. 2. 토양중 NH₄-N함량의 경시적 변화는 이앙후 7일에 20.7~47.4㎎ kg^(-1)으로 점차 감소하였는데 처리에 따라서는 자운영+질소 70%, 자운영+질소 50% 시용구에서 높았다. 3. 벼의 생육은 사질답이 보통답에 비하여 초장 및 간장이 크고 ㎡당경수가 많았고 처리에 따라서는 자운영+질소 50%, 자운영+질소 30%시용구에서 생육이 좋았다. 식물체중의 T-N, P₂O_(5), K₂O함량도 자운영+질소 70%, 자운영+질소 50%시용구에서 많은 편이었다. 4. 시험후 토양의 화학성은 관행에 비하여 보통답의 자운영 시용구에서 OM, CEC, Ava, P₂O_(5)함량이 증가하였고 사질답에서는 CEC가 증가하였다. 5. 벼의 수량은 관행(보통답 5.15Mg ha^(-1), 사질답 5.16Mg ha^(-1))에 비하여 보통답에서는 자운영+질소 70%, 50%, 30%시용구에서 각각 3, 6, 4% 증수되었고, 사질답에서는 자운영+질소 70%, 50%시용구에서 각각 3, 5%증수되었다. 6. 남부 평야지에서 자운영을 재배하여 생초 20Mg ha^(-1)를 녹비로 투입하면 벼를 재배시 질수시용 적정량을 보통답에서는 관행시비량의 30%, 사질답에서는 관행시비량의 50%이였다. This study was conducted to find out an amount of N fertilizer for rice culture followed after milk vetch(MV) cultivated at normal and sandy paddy field in Naju which lies to southern plain region from 1999 to 2001. The amounts of N fertilizer were 110(normal paddy) and 130(sandy paddy)㎏ ha^(-1) at control and 0, 30, 50, 70% of control. At flowering stage of MV, Plant height was 43.6~43.9㎝ and fresh weight was more than that of sandy paddy field. Also, the contents of T-N, T-C, P₂O_(5), CaO, MgO in MV plant cultivated normal paddy field were higher than those of sandy paddy field. Content of NH₄-N in soil was 20.7~47.4㎎ ㎏^(-1) at 7days after transplanting and 6.1~8.1㎎ ㎏^(-1) at 70days after transplanting of rice plant. Content of NH₄-N in soil was high at the treatments of MV+N50% and MV+N70%. Rice plant height, culm length and the number of tiller per ㎡ in sandy paddy field were higher than those of normal paddy field. Growth of rice plant in MV+N70% and MV+N50% was higher than that in others. And the content of T-N, P₂O_(5) and K₂O of rice plant in MV+N70% and MV+N50% were higher than those in others. Chemical properties of soil after experiment were pH 5.1~5.9, OM 15.6~20.9g ㎏^(-1). CEC 10.1~13.8cmol ㎏^(-1) and Ava. P₂O_(5) 152~244㎎ ㎏^(-1). The contents of OM. CEC and Ava. P₂O_(5) in soil applied MV at normal paddy field were higher than those of the control, and the content of CEC in soil applied MV at flowering stage, rice yields of MV+N70%, 50%, MV+N30% were increased 3, 6, 4% more than that of control (5.15Mg ha^(-1)) at normal paddy field. Rice yields of MV+N70%, MV+N50% were increased 3, 5% higher than that of control(5.16Mg ha^(-1)) at sandy paddy field. Nitrogen application rate of normal paddy field was 30%, and sandy paddy field was 50% of conventional fertilization rate when 20Mg ha^(-1) MV cultivated paddy field was inputed for rice culture in the southern plains.

紫雲英裁培沓에서 窒素와 石灰의 施用이 紫雲英의 腐熟과 벼 生育에 미치는 影響

윤봉기,김희권,최형국,박인진 한국국제농업개발학회 2004 韓國國際農業開發學會誌 Vol.16 No.2

녹비작물로서 자운영을 재배한 논에 수포를 재배할 때 시용한 자운영의 부숙촉진방법을 구명하기 위하여 자운영의 개화 성기와 결실기에 자각 예취하여 시용하고 질소 0, 30, 60, 질소 30+석회 1000, 석회 1000㎏/㏊의 5가지 부숙촉진 처리로 2000년부터 2년동안 포장시험한 결과는 다음과 같다. 1. 자운영의 개화성기 생육은 초장 44.5㎝, 생초수량 23.88Mg/㏊였으며 결실기에는 초장43.6㎝, 생초수량 19.53Mg ㏊^(-1)이였다. 무기성분 함량은 자운영 개화성기에 T-N 2.6%. T-C 78.6%, P₂O_(5) 0.57%, K₂O 2.73%였으며 결실기에는 T-N 2.3%, T-C 82.8%, P₂O_(5) 0.53%. K₂O 2.15%였다. 2. 개화성기에 시용한 자운영의 부숙정도는 경운후 10일에 82.5~86.8%로 급증하여 이후 완 만한 경향을 보였으며 결실기의 부숙정도는 경운후 10일에 62.2~67.1%로 개화성기보다 낮았다. 부숙처리에 따라서는 개화성기에 예취하여 시용하고 부숙처리한 시험구중 석회 1,000㎏/㏊처리에서 최고의 부숙정도를 보였으며 결실기 처리구에서는 질소 30+석회 1,000㎏/㏊ 처리구에서 높은 부숙도를 의였다. 3. 벼의 생육은 출수기의 초장은 102.0~l12.4㎝, 수확기의 간장은 76.6~84.2㎝, 수장 17.9~20.0㎝로 개화성기의 부숙 처리에서 초장. 간장, 수장이 큰 편이었다. 벼의 수량은 4.89~5.33Mg/㏊로 자운영 개화성기의 부숙촉진 무처리(5.01 Mg/㏊)에 비하여 석회 1,000㎏ ㏊처리에서 4% 증수되었고 결실기의 부숙촉진 처리에서는 무처리 (5.25Mg/㏊)에 비하여 질소 30+석회 1,000㎏ ㏊^(-1)처리에서 1%증수되었으나 기타 처리에서는 1~2%감수되었다. 4. 시험후 토양의 화학성은 pH 5.4~6.0. OM 12.5~13.5g/㎏, CEC 12.4~14.5c㏖/㎏, Ava. P₂O_(5) 38~56㎎/㎏으로 자운영 부숙촉진 처리에저 Ava. P₂O_(5), Ava. SiO₂, CEC, 치환성 K의 함량이 많은 편이었다. The experiment was conducted to find out quick decomposition method of applied milk vetch at rice paddy soil. Decomposition methods were 5 treatments of N fertilizer 0, 30, 60, N 30+Lime 1000 and Lime 1000 ㎏/㏊ at paddy field applied flowering and bearing stage of milk vetch. It was summerized as follows; At flowering stage of milk vetch, the content of T-N, T-C, P₂O_(5), K₂O in milk vetch plant was 2.6, 78.6, 0.57, 2.73% respectively. plant height was 44.5 ㎝. green yield was 23.88 Mg/㏊. At bearing stage of milk vetch, the content of T-N, T-C, P₂O_(5), K₂O in milk vetch was 2.3, 82.8, 0.53, 2.15% respectively. Plant height was 43.6 ㎝. Green yield was 19.53 Mg/㏊. Decomposition rate of milk vetch at 10 days after application at the flowering stage was 82.5~86.8% and that of bearing stage was 62.2~67.1%. When milk vetch was cut at flowering stage, decomposition rate of milk vetch treated lime 1000 ㎏/㏊ was more than any other treatment. When milk vetch was cut at bearing stage, decomposition rate of milk vetch treated N 30+lime 1000 ㎏/㏊ was highest. Plant height of rice was 102.0~112.4 ㎝ at heading stage and stem height was 76.6~84.2 ㎝, panicle length 17.9~20.0 ㎝ at harvesting stage. Plant height, stem height, panicle length of decomposition treatment plot was trend to longer when milk vetch was cut at flowering stage. When milk vetch was cut at flowering stage, rice yield of lime 1000 ㎏/ ㏊ applied plot increased 4% more than that of control (5.01 Mg/ha). When milk vetch was cut at bearing stage, N30+lime 1000 ㎏/㏊ applied plot was increased 1% than that of control (5.25 Mg/ha). But the rice yield other plot decreased 1~2% than that of control. Chemical properties of soil after experiment were pH 5.4~6.0, OM 12.5~13.5 g/㎏, CEC 12.4~14.5 c㏖/㎏. The content of Av. P₂O_(5), Av. SiO₂, CEC, Exch. K in soil applied milk vetch was more than that of control.

Streptomyces sp. 3D3 균주가 생산하는 항고추역병성 항생물질

윤봉식,김창진,이인경,히로유끼 고시노,유익동 한국미생물생명공학회 ( 구 한국산업미생물학회 ) 1996 한국미생물·생명공학회지 Vol.24 No.1

미생물 배양액을 이용하여 고추역병방제를 위한 농업용 항생물질을 탐색하던 중 고추역병균인 Phytophthora capsici에 강한 항균활성을 나타내는 3D3 균주를 선발 하였다. 선발된 균주의 배양적, 형태적, 생리적 특성을 조사한 결과 Streptomyces속에 속하는 것으로 동정하였고 따라서 Streptomyces sp. 3D3으로 명명하였다. 배양액으로 부터 HP-20 column chromatography, EtOAc extraction, silica gel column chromatography 및 HPLC에 의하여 활성물질을 분리 정제하였으며, 발색반응, UV 흡수, ^1H-NMR등 각종 spectrum 분석을 통하여 본 활성물질을 bafilomycin C_1으로 동정하였다. Streptomyces sp. 3D3이 생산한 compound 3D3은 다양한 식물 병원성 곰팡이에 대하여 강한 항균활성을 나타내었다. During the screening for the antifungal compounds against Phytophthora capsici causing phytophthora blight of red pepper, we isolated a strong active compound, bafilomycin C_1, produced by strain 3D3. The producing organism was identified as Streptomyces sp. based on taxonomic studies. The antifungal compound was purified from culture broth by HP-20 column chromatography, ethylacetate extraction, silica gel column chromatography and HPLC, and was identified as bafilomycin C_1 by color reaction, UV and ^1H-NMR spectral data analysis. Bafilomycin C_1 showed strong antifungal activity against various phytopathogenic fungi.