방역작업자의 브롬화메틸(methyl bromide) 노출수준과 생물학적 모니터링

이종성,이용학,신재훈,최정근,오차재,정호근 한국산업위생학회 2001 한국산업보건학회지 Vol.11 No.3

This study was performed to estimate environmental and biological monitoring of worker exposed to methyl bromide through quarantine fumigation. Airborne methyl bromide and it's metabolites were analyzed by gas chromatography and ion chromatography, respectively. The results are as followings; airborne concentration of methyl bromide(TWA) was 2.08±1.56 ppm(N=8). Dispersion and setting/degas groups were 0.67±0.12 ppm(N=2) and 2.54±1.53ppm(N=6), respectively. Bromide ion concentration in serum was 23.40±14.91㎎/ℓ(N=10) in the exposed workers and 4.74±0.82㎎/ℓ(N=21) in the non-exposed workers. Bromide ion concentration in urine was 35.56±26.89㎎/ℓ(N=11) in exposed group and 6.62±2.31㎎/ℓ(N=21) in non-exposed group. Good correlation was observed between concentration of serum and urine(r^2=0.890 p<0.01). No significant correlations of other determinanats were observed. Calcuated from a regressive curve. the biological half lifes of serum and urine were 10.7 and 5.9 days. In these results, biological monitoring of bromide ion of serum and urine provided useful information for evaluating exposure of workers to methyl bromide, so that an availability of bromide ion of biological samples was showed as biological monitoring indices for methyl bromide.

상아질 접착에서 collagenase와 esterase가 미세인장결합강도에 미치는 영향

정영정,현홍근,김영재,김정욱,이상훈,김종철,한세현,장기택 대한소아치과학회 2007 大韓小兒齒科學會誌 Vol.34 No.2

상아질-레진 접착강도에 대한 collagenase와 esterase의 영향을 살펴보기 위해, 소구치의 교합면 상아질에 Single Bond 2와 Clearfil SE Bond로 접착을 시행하고 미세 시편을 제작하여 PBS, collagenase 용액, esterase 용액에 4주간 보관한 후 미세인장결합강도를 측정, 비교하여 다음과 같은 결론을 얻었다. 1. 모든 보관 용액에서 Single Bond 2의 미세인장결합강도는 Clearfil SE Bond보다 유의하게 낮았다(p<0.05). 2. Single Bond 2의 미세인장결합강도는 collagenase군이 PBS군, esterase군보다 낮았다(p>0.05). 3. Clearfil SE Bond의 미세인장결합강도는 esterase군이 PBS군에 비해 낮았으나(p>0.05), collagenase군보다는 높았다(p>0.05). Collagenase군은 PBS군에 비해 유의하게 낮은 미세인장결합강도를 보였다(p<0.05). The purpose of this study was to evaluate the effect of collagenase and esterase on the microtensile bond strength (μTBS) in dentin bonding. After resin composites were bonded to occlusal dentin, μTBS specimens were formed and stored in PBS, collagenase, or esterase solution. After 4-week storage, μTBS was determined and, the results were as follows: 1. μTBS values of Single Bond 2 were lower than those of Clearfil SE Bond for all storage medium (p<0.05). 2. In single Bond 2 group, collagenase solution lowered bond strength more than PBS and esterase solution (p>0.05). 3. In Clearfil SE Bond group, esterase solution lowered bond strength more than PBS(p>0.05). Collagenase solution lowered bond strength more than esterase solution(p>0.05) and PBS(p<0.05).

벼 자동화 육묘시설에서 적정 파종기와 묘대기간의 선정

鄭錫祚,孫再根 慶北大學校 農業科學技術硏究所 2005 慶北大農學誌 Vol.23 No.-

The purpose of this study was carried out to determine the optimum sowing date and days after sowing (DAS) in automatic facility located at Uiseong of Gyeoungbuk province. The seedling height was rapidly increased with a delay of sowing time from April to May. The 10-day old seedlings with suitable plant height(>10cm) for machine transplanting in the facility were obtained when the seeds sowed after May 20 at Uiseong in Gyeoungbuk province. The dry weight-height ratio of 10-day old seedlings was significantly decreased when the seeds sowed after June 20, and 15-days old seedlings did after May 10. No. of panicles/hill was reduced with increasing of days after seeding. But there were no significant difference among other yield components such as no. of grains/panicle, ratio of ripened grains, and 1,000 grain weight. The highest grain yield, 748kg/10a, was attained from the 10-day old seedlings transplanted at May 27 in comparision with those of 15-day and 20-day old seedlings. The grain yield of 10-day old seedlings transplanted at June 26 was also higher than that of 15-day old seedlings.

정신분열병 환자의 분노 경험과 표현

정호성,송지영,정근재 대한신경정신의학회 2000 신경정신의학 Vol.39 No.6

연구목적 : 정신질환자에 대한 편견은 이들에 대한 치료에 큰 영향을 미치고, 이들이 사회 적응과 재활에 어려움을 겪는 요인이 된다. 저자는 정신분열병 환자들이 느끼는 분노의 특징과 표현이 일반인에 비해 과연 크고 광범위한 것인지에 대하여 알아보고, 나아가서 이들 환자에 대한 편견을 시정할 수 있는 근거를 얻고자 하였다. 방 법 : DSM-IV에 의거한 정신분열병 환자 105명과 대조군으로 대학병원 내과에 입원한 환자 43명, 그리고 건강한 성인 65명을 대상으로 한국판 State-Trait Anger Expression Inventory를 이용한 분노의 경험과 표현을 조사하여 정신분열병 환자군의 분노의 특성을 비교 분석하였다. 결 과 : 정신분열병 환자군이 건강대조군보다 상태 분노가 유의하게 높았고, 특성-기질은 다른 두 군에 비해 유의하게 낮았다. 분노 표현 척도 중에 분노 억제와 분노 통제는 건강대조군에 비해 정신분열병군에서 유의하게 낮았다, 그러나 특성-반응과 분노-표출은 유의한 차이가 없었다. 그리고 병식 유무에 따라 세 군간에 분노 척도를 비교해 본 바 모든 척도에서 유의한 차이를 보이지 않았다. 결 론 : 정신분열병 환자들은 정상대조군에 비교해 볼 때 상당한 분노를 가지고 있고, 분노 억제와 조절 능력은 부족한 점을 보여주고 있다. 그러나 분노의 표출은 크지않다고 할 수 있다. 이러한 결과는 정신분열병 증상의 하나인 자아기능의 약화일 수도 있으나 만성화에 따른 음성증상에 의한 것일 수도 있다. 이들의 예기치 않는 적대적 행동이나 난폭한 행동은 급성기가 아닌 시기에는 주위 환경에서 비롯된 자극에 따른 반응일 수 있다. 그러므로 정신분열병 환자는 무조건 위험하다는 잘못된 견해는 시정되어야 할 것이다. 그리고 향후 정신분열병 환자가 갖는 분노의 특성으로 파악하는 것은 예기치 않는 이들의 분노 표현에 대처하는 방법을 찾는데 도움이 될 수 있을 것이다. Objectives : The prejudice against mentally deranged persons has an effect on the treatment of the mental illness and is one of the reasons shy they have difficulties in social adaptation and rehabilitation. We intended to examine the characteristics and expression of the anger in schizophrenic patients to find how much anger they feel compared with general population. And we tried to find the basis on which the prejudice can be corrected. Method : 105 schizophrenic patients were selected according to DSM-IV. Control groups were 43 patients who were admitted to the department of internal medicine in university hospital and 65 healthy adults. The experiences and expressive patterns of anger were surveyed by State-Trait Anger Expression Inventory, Korean edition. And the characteristics of the anger in the schizophrenic patients were compared with those in controls and analyzed. Results : State-anger was significantly higher in the schizophrenic patients group than in healthy control group and trait-temperament was significantly lower in schizophrenic patients group than in other two control groups. Among the anger expression scales, anger-in and anger-control were significantly lower in schizophrenic patients group than in healthy control group. But trait-reaction and anger-out showed no significant difference among three groups. And no significant difference was shown among the anger scales of three groups according to the presence of insight of the disorder. Conclusion : It is shown that schizophrenic patients have considerable much anger when compared to healthy control group and insufficient ability to suppress and control the anger. But it may be said that the expressions of anger in schizophrenic patients are not apparent. These results may be due to either the weakness of ego function, which is one of the symptoms of schizophrenia, or negative symptoms following chronicity of the disorder. Unexpected aggressiveness or violence of them may be triggered by stimuli from the circumstances, if they are not in acute phase. And the misunderstanding of general public that schizophrenic patients are dangerous unconditionally should be corrected by the education. We can't develop the appropriate strategy to cope with the anger of the schizophrenic patients until understand well the characteristics of anger in them.

알코올에 의해 유발된 진정 및 수행 장애에 대한 카페인의 반전 효과

유남재,김정란,조정혜,왕성근 대한생물치료정신의학회 2004 생물치료정신의학 Vol.10 No.1

연구목적 : 저자들은 알코올의 진정 작용과 수행 붕괴 효과에 대한 카페인의 영향을 확인하기 위해 이 연구를 시행하였다. 방 법 : 건강한 19세에서 25세 사이의 대학생 지원자 14명을 대상으로 Epsworth Slippiness Scale(ESS), Stand-ford Sleepiness Scale(SSS), Visual Analogue Sclae(VAS), Vienna test, Multiple Sleep Latency Test(MSLT) and Breath Ethanol Concentration(BrEC)을 측정하였다. 결 과 : 알코올(1.0g/㎏)은 투여 후 5시간까지 입면잠복기를 단축시키며, 카페인(300mg)은 이러한 단축을 현저히 개선시키는 반전 효과가 있었다. 알코올(1.0g/㎏)은 투여 후 3~5시간 동안 주간 졸음과 피로감을 유발하며, 카페인(150~300mg)은 졸음과 피로감을 개선시키는 효과가 있었다. 경계력은 알코올(0.5~1.0g/㎏) 투여 1시간 후 유의하게 저하되었고 카페인(150~300mg) 투여 3시간 후부터 개선되었으며, 집중력은 알코올(1.0g/㎏) 투여 후 변화가 없었으나 카페인 투여 3시간 후부터 유의하게 향상되었고, 단기 기억은 알코올과 카페인 투여에 유의한 변화가 나타나지 않았다. 기준일, 알코올 투여일, 알코올 및 카페인 투여일에서 각 변량(SSS, MSLT, 졸음, 피로감, 기분, 집중력, 경계력, 단기 기억력)간에는 일관성 있는 유의한 관계가 나타나지 않았다. 정상인에서 알코올은 입면잠복기를 단축시키고 주간 졸음과 피로감을 유발하며, 카페인은 알코올에 의해 유발된 입면잠복기의 단축을 연장시키고 주간 졸음과 피로감 및 경계력과 주의 집중력을 개선시키는 효과가 있었다. 결 론 : 카페인은 알코올의 진정 및 수행 붕괴 효과를 반전시키는 효과가 있음을 알 수 있었다. Objectives : The authors performed this study to identify the effects of caffeine on the alcohoi's sedative and performance disruptive effects. Methods : Epsworth Sleeppiness Scale(ESS), Stanford Sleepiness Scale(SSS), Visual Analogue Scale WAS), Vienna test, Multiple Sleep Latency Test(MSLT) and Breath Ethanol Concentration(BrEc) were checked for the 74 young and healthy college student volunteers aging from 19 to 25 years. Results : Alcohol(1.0g/kg) freduced sleep latency until 5 hours after administration and caffeine(300mg) reversed this effect significantly. Alcohol(1.0g/kg) induced daytime sieepiness and fatigue 3-5 hours after administration and caffeine(l50-300mg) improved sleepiness and fatigue. Vigilance was decreased significantly 1 hour after alcohol administration(0.5-1.0g/kg) and improved 3 hours after caffeine administration(l50-300mg) and attention was not changed after alcohol administration(1.0g/kg) but improved significantly 3 hours after caffeine administration and short-term memory was not changed significantly after alcohol and caffeine administration. On the baseline, the day of alcohol administration only, and alcohol and caffeine administration day, between each vanable(SSS, MSLT, sleepiness, fatigue, mood, vigilance. concentration, and short-term memory) did not show significant consistent correlation. Conclusion : Alcohol decreases sleep latency and induces daytime sleepiness and fatigue, and caffeine prolonges sleep latency and improves daytime sleepiness, fatigue, vigilance and attention in normal subjects. These results showed caffeine reverses alcohol's sedative and performance-disruptive effects.

심실 중격 결손에 의한 감염성 심내막염 환자의 치과치료

양정현,현홍근,김영재,김정욱,장기택,이상훈,한세현,김종철 대한소아치과학회 2007 大韓小兒齒科學會誌 Vol.34 No.3

除草劑의 種類와 施用量 및 플라스틱 필름 멀칭이 雜草發生과 고추의 收量 및 生育에 미치는 效果

李政明,曺哉銑,崔根元 慶熙大學校 1983 論文集 Vol.12 No.-

Studies were conducted to investigate the effect of Lasso [Alachlor: 2-Chloro-2'6'-dimethyl-N-(methoxymethyl) acetanilied]on mulched and nonmulched hot pepper filed. Lasso treatment greatly inhibited weed growth and the granular formulation was more effective than emusifiable concentrate in controlling weed growth in both mulched and nonmulched plots. Lasso effect was not apparent about 50 days after treatment. The growth of pepper plant was greatly promoted by mulching and yield of green peppers was more than doubled by transparent polyethylene film mulching. There was no plant in the entire plot which showed apparent phytotoxicity by Lasso treatment.

유역 피복 특성을 고려한 유출량 산정을 위한 地形情報시스템(GIS)의 적용

김재한,정관수,이근영 忠南大學校 産業技術硏究所 1999 산업기술연구논문집 Vol.14 No.1

To compute the direct runoff basin, The SCS Curve Number can be used simply. It was evaluated by the U.S. soil conservation service and applies to U.S. watershed, In this study to apply the SCS Curve Number to domestic basin, GIS was used to evalute it. In many case, when the direct runoff from the SCS Curve Number is calculated, much unadjusted hydrologic data are demanded. But using and being adjusted of these data are very difficult. In this study, the SCS Curve Number was evaluated through making DataBase by GIS to make simple procedure. and the direct runoff was computed by it. The result of this study shows that Evaluated Curve Number Value is 60.69 in AMC-I, 78.61 in AMC-II and 89.42 im AMC-III Condition from domestic basin

포도당 섭취와 운동이 인슐린과 글루카곤 호르몬에 미치는 영향

이재규,고기준,박정근 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.2

The purpose of this study in to find out how oral injection glucose effect blood-glucose and hormone. To conduct the study seven healthy male students were chosen as subject, when each subject oral injected glucose and non-injected exercise of 30minutes with 60%HRmax the comparative analysis of the progressive change in their blood-glucose and hormone is as follows: 1) When oral injected glucose and non-injected significantly of blood-glucose did not present, as compared pre-exercise with post-exercise and recovery 30minutes change presented significantly. 2) When oral injected glucose and non-injected significantly of blood-insulin did not present, as compared pre-exercise with post-exercise and recovery 30minutes change presented significantly. 3) When oral injected glucose and non-injected significantly of blood-glucagon presented as compared pre-exercise with post-exercise and recovery 30minutes change presented significantly. Therefore when oral injected glucose blood-glucose and insulin did not present change, blood-glucagon presented many change.

인천 인현동 호프집 화재 피해자 분석

최정태,안무업,안희철,최영미,정재봉,서정열,유기철,이삼우,박석현,조준휘,김성환,김아진,송근정 대한응급의학회 2001 대한응급의학회지 Vol.12 No.4

Purpose : This study was conducted to develop field triage, transportation, distribution, and prehospital care at a fire disaster by analyzing the victims of the fore that broke out at a bar in Incheon. Method : We analyzed the cases of the victims of a fire in Incheon in Oct. 1999. We determined the primary care hospital, the arrival time, the burn size, the outcome, and the injury type from the medical records, the concerned organ records, and interviews with concerned persons. Result : The total number of victims was 137: 56 prehospital deaths, 1 hospital death, and 80 survivals. The Pearson correlation coefficient between the burn size and the severity was -0.175. There were 121(89.6%) cases of inhalation injury, 59 (43.7%) cases of flame burns, 66 (48.9%) cases of hypoxic brain damage, and 16 (11.9%) cases involving other types of injury. Conclusion : The causes of death of the fire victims were inhalation injury and hypoxic brain damage due to CO poisoning and other toxic inhalants. We propose the use of a simple triage and rapid treatment(START) system and a reassessment the delayed category in fire disasters.