대구 및 인근지역의 도로먼지에 함유된 미량원소성분의 함량분포

황윤정,황승만,최진수,김무식,백성옥 嶺南大學校 環境問題硏究所 1998 環境硏究 Vol.17 No.2

요약문 본 연구는 각종 먼지 가운데서도 독성이 가장 큰 것으로 알려진 도로먼지에 함유된 미량원소 성분이 조성 및 특성을 파악하기 위해 1992년 1월에서 10월가지 주거지역, 상업지역, 공업지역, 교외지역, 전원지역 등에 위치한 도로에서 시료를 채취하였으며 채취된 시료는 산으로 추출한후 ICP로 분석하였다 . 그 결과 토사 및 황사현상과 같은 자연발생원과 연관지을 수 있는 Al, Ca, Mg, Ti, Si, Na, K의 농도가 지역에 따라서는 전원지역과 교외지역에서, 그리고 도로포장 형태에 따라서는 비포장 도로에서 높게 나타난 반면에, 각종 연소 및 차량과 같은 인위적인 발생원과 관련이 있는 As, Cr, Mn, Zn, Pb, Cu, Ni는 공업지역 및 상업지역, 그리고 아스팔트에서 비교적 높게 검출되어 이러한 미량원소성문들의 농도분포는 지역에 따라, 그리고 도로포장 형태에 따라 특징적인 양상을 나타내는 것으로 조사되었다. 또한 As, Pb, Al 등의 일부 미량원소성분들의 농도는 계절에 따른 차이를 나타내었으며, 농축계수에 의한 평가결과 농축계수가 낮게 나타난 Na, Si, Ti, K, Al 등은 자연발생원에 의해 상당한 영향을 받는 반면에 As, Pb, Zn 등은 농축계수가 매우 높게 나타나 이들 성분의 경우에는 인위적인 발생원에 의한 기여도가 큰 것으로 평가되었다. Abstract This study was carried out to characterize the trace elements in street dust known to contain several toxic elements. Street dust was collected in residential, commercial, industrial, suburban and rural area of Taegu and on the vicinity of Taegu from January to October, 1992. Total amount of 16 trace elements in street dust were analyzed by ICP spectrophotometer. While the levels of As, Cr, Mn, Zn, Pb, Cu and Ni were higher in industral and commercial area than any other area by sites and the highest levels appeared on asphalt and cement street by street conditions. Also the concentrations of some trace elements originated mainly from soil (e.g. Al, Ca, Mg, Si, Na) were higher in rural and suburban area by sites and the highest levels appeared in unpaved street by street conditions. The concentrations of several trace elements such as Aa, Pb, Al appeared seasonal differences. The estimated enrichment factors (EF) for Na, Si, Ti, K and Al components showed with soil compositions appeared to have low values, while As, Pb and Zn components showed relatively higher values. These results imply that the latter constituents were likely to be affected by dry and wet depositions of atmospheric particles orginated from anthropogenic sources such as fuel combustion and refuge burning.

유산양 유방염에 대한 Chitosan 약침의 치료 효과

황수현,서진석,김덕환,김명철,신상태,전무형,南三郞,김영찬,이우근,표수일 충남대학교 수의과대학 동물의과학연구소 1999 動物醫科學硏究誌 Vol.7 No.-

To improve the therapeutic method for mastitis, treatment effect of chitosan pharmacopuncture was examined in three milking goats(A,B and C). Mastitis was artificially induced in two milking goats(A and B) and one goat(C) was naturally infected case with mastitis. The acupoint used was Yang-Ming and chitosan suspensions(provided from Tottory University, Japan: 30㎎ of chitosan/㎖)were injected to the acupoint with 5㎖/time for 3 days, respectively. As for the change of somatic cells in milk along with chitosan pharmacopuncture, they showed a decreasing tendency after increase on the 3rd day in all udders of B. In addition, as for the change of total leukocyte counts of peripheral blood with chitosan pharmacopuncture, they showed a decreasing tendency after increase on the 3rd day in B and C except A which showed a increasing tendency until on the 7th day. In the change of neutrophil/lymphocyte(N/L) ratio, increasing tendency was seen in A and C but increasing tendency after slight decrease was observed in B. Further, in the change of serum total protein and A/G ratio, serum total protein content was decreased after slightly increase on the 3rd day in A, and they were decreased after increase until on the 7th day in B and C, respectively. As for the change of A/G ratio, different pattern increasing tendency was shown in A, B and C.

窒素 및 加里 施肥水準이 飼料作物의 生育 및 乾物收量에 미치는 影響

黃鏞哲,金武成 경희대학교 부설 식량자원개발연구소 1984 硏究論文集 Vol.5 No.-

This study was conducted to investigate the effect of nitrogen and potassium fertilizers applied to forage crops grown alone and in mixture with grass and legumes of forage crops, on the yield of dry matter. The results are summarized as follows; 1. Nitrogen fertilizers for the yield of dry matter showed highly effective to orchardgrass in case of grown alone and were also effect of grown in mixture alfalfa and grasses, but potassium fertilizers did not show any significance on the dry matter yield increases compared with control. 2. In nitrogen fertilizer plots. alone and mixed sowings showed the total yields of dry matter in decreasing order of tallfescue>orchardgrass>alfalfa and alfalfa+orchardgrass (5:5)>alfalfa+orchardgrass(3:7)>alfalfa+orchardgrass(7:3)>alfalfa+tallfescue(3:7)>alfalfa+tallfescue (7:3)>alfalfa+tallfescue (5:5), respectively. 3. With nitrogen fertilizers for the yield of dry matter was highest effective with the application level of 20㎏/10a throughout the plots. except the with nitrogen plot of grown alone of alfalfa and orchardgrass. 4. In case of grown in mixture with grass and legume increasing total yields of dry matter with nitrogen and potassium fertilizers was ascribed to increase grasses. but botanical composition of alfalfa was decreased.

窒素 및 加里 施肥水準이 飼料作物의 生育 및 乾物收量에 미치는 影響

黃鏞哲,金武成 慶熙大學校 1984 論文集 Vol.13 No.-

This study was conducted to investigate the effect of nitrogen and potassium fertilizers applied to forage crops grown alone and in mixture with grass and legumes of forage crops, on the yield of dry matter. The results are summarized as follows; 1. Nitrogen fertilizers for the yield of dry matter showed highly effective to orchardgrass in case of grown alone and were also effect of grown in mixture alfalfa and grasses, but potassium fertilizers did not show any significance on the dry matter yield increases compared with control. 2. In nitrogen fertilizer plots, alone and mixed sowings showed the total yields of dry matter in decreasing order of tallfescue > orchardgrass > alfalfa and alfalfa + orchardgrass (5:5) > alfalfa + orchardgrass (3:7) > alfalfa + orchardgrass (7:3) > alfalfa + tallfescue (3:7) > alfalfa + tallfescue (7:3) > alfalfa + tallfescue (5:5), respectively. 3. With nitrogen fertilizers for the yield of dry matter was highest effective with the application level of 20㎏/10a throughout the plots, except the with nitrogen plot of grown alone of alfalfa and orchardgrass. 4. In case of grown in mixture with grass and legume increasing total yields of dry matter with nitrogen and potassium fertilizers was ascribed to increase grasses, but botanical composition of alfalfa was decreased.

LiTaO_3 단결정을 사용한 압전변압기의 개발

황성필,김무준,하강열,강갑중 한국센서학회 2002 센서학회지 Vol.11 No.3

본 연구에서는 온도에 따른 압전특성이 매우 안정적인 LiTaO_3(x-112°y) 단결정을 이용하여 압전변압기를 제작하고 그 특성을 분석하였다. 제작시 LiTaO_3 단결정의 변환효율이 낮은 단점을 보완하기 위해 Lame'-mode를 이용하여 길이와 폭의 비가 2:1인 압전변압기를 제작하고 PSpice를 이용하여 진동 모드 해석, 입력전압에 따른 출력전압특성 및 진동속도특성을 분석하였다. 제작한 압전변압기는 길이방향의 제 2차 고조파 주파수와 폭방향의 기본공진주파수가 결합된 290.83(㎑)에서 입력전압에 대한 최대출력전압이 나타났으며, 약 10배 정도의 승압비를 얻을 수 있었다. The single crystal of LiTaO_3(x-112°y) has very stable thermal characteristics in a piezoelectric transformer. In this paper, a piezoelectric transformer made of the crystal is newly designed and its operating characteristics are analyzed. The length of the transformer is determined as twice as its width for Lame'-mode because the single crystal of LiTaO_3 has low electro-acoustic efficiency. The electric and vibrational characteristics of the transformer is simulated by the PSpice program, and its results are compared to experimental ones. As the results, the ratio of output voltage to input shows large than 10 at 290.83(㎑), which is the frequency coupled the 2nd harmonic for length and the fundamental for width of the Lame'-mode transformer.

해수중 철의 양극산화기구

곽무근,이성룡,황용길 동아대학교 공과대학 부설 한국자원개발연구소 1988 硏究報告 Vol.12 No.2

This study has been carried out to investigate the formation mechanism of iron oxide making from the iron perchloric oxide which had been made by the electrolysis. This experiment was performed as follows. In the electrolysis, the iron plate was used as the anode and the stainless steel as the cathode. The iron perchloric oxide, which had made by the electrolysis, was controlled in PH and performed air treatment. After that, TG-DTA, heat reaction, and X-ray diffraction analyzing was performed. The results obtained from the experiment are as follows ; 1) The optimum condition in electrolysis is electric potential 1.5V, the distance of electrodes 1.5㎝, and composition of electrolyte 10 wt.% salt. 2) When the air treatment was performed, the formation was Goethite in PH 3-5, Magnetite in PH 6-10, and Lepidocrocite in PH 10-13 ranges. 3) Goethite was transformed into Hematite at above 200℃. 4) Magnetite and Lepidocrocite was transformed into Maghemite at 130-300℃ And into Hematite at 500-600℃.

한국인 알코올 의존 환자에서 알코올 대사 효소 유전자형 빈도의 남녀 차이

김성곤,김철민,이덕기,황인복,이현숙,김성연,전은숙,송영상,박제민,최병무,김명정 大韓神經精神醫學會 2005 신경정신의학 Vol.44 No.2

Objectives : There are a number of preceding epidemiological studies reporting gender differences in the genetic etiology of alcohol dependence. The author investigated gender difference in the frequencies of ADH2 and ALDH2 genoypes between the patients with alcohol dependence and normal control. Methods : The subjects were 141 alcohol dependent patients (104 males, 37 females) and 138 normal control (79 males, 59 females). The frequencies of 1/1 and 1/2+2/2 (2+ afterward) genotypes for ADH2 and ALDH2 were investigated in male and female between alcohol dependence and normal control group. DNA was extracted from WBC in peripheral venous blood and PCR-RFLP method was used out for genotyping. Results : First, the frequency of ADH2 1/1 genotype was significantly higher in alcohol dependent patients than normal control in both genders. Second, while there was no gender difference in the frequency of ADH2 1/1 genotype in normal controls, in the patient group however, the frequency was significantly higher in females than males. Third, in male subjects with alcohol dependence, the frequency of ALDH2 1/1 genotype was significantly higher than in male normal control subjects. On the other hand, in female subjects with alcohol dependence, the frequency of ALDH2 2+ genotype was significantly higher than in female normal control subjects. Conclusion : These results suggest that while the risk of alcohol dependence is predominantly affected by ALDH2 1/1 geno-type in male, the female ADH2 1/1 genotype is mainly associated with the risk of alcohol dependence. This means that there are gender differences in the genetic etiology of alcohol dependence.

Dispatcher(전화 상담원)의 보조에 의한 심폐소생술

안무업,김영식,이부수,황성오,임경수 大韓應急醫學會 1992 대한응급의학회지 Vol.3 No.1

Background: Dispatcher-assisted telephone instruction in cardiopulmonary resuscitation(CPR) has been proposed to increase rates of bystander CPR in cases of out-of-hospital cardiac arrest. In Korea, bystanders do not know how they resuscitate the victims and EMS(Emergency Medical System) is incomplete. Study Objectives: This study was undertaken to tested the efficacy of dispatcher assisted telephone CPR using a recording mannikin(Anne Resusci) in a highstress, simulated cardiac arrest scenario. Study Subjects: We assesed in a group of volunteers, without prior CPR lectured and training(GroupⅠ, n=20), without prior CPR training but received lecture previously(Group Ⅱ, n=20) who received telephone instruction were compared with that of previously recevied lecture and tranined(Group Ⅲ, n=20) who received same massage. Performances of above groups were also compared with a group(Group Ⅳ, n=20) composed of previously received lecture and trained volunteers who did not receive the massage. Results: Members of groups Ⅰ,Ⅱ, and Ⅲ delivered similar average ventilation volumes, approximately 1L/cycle. In contrast, group Ⅳ delivered somewhat less, about 700ml/cycle(p<0.05). Group Ⅰ performed ventilation better than group Ⅳ but there was no significant intergroup differences in the performing effective chest compressions. The global performance of group Ⅲ, the group with prior CPR lecture, trained and telephone instruction, was superior to that achieved by other groups(p<0.05). We conclude that dispatcher-assisted telephone CPR can offer a safe and cost-effective means to increase the rate of bystander CPR and also improves the quality of CPR performed by persons with prior CPR training.

세 건의 재해사고를 통한 우리 나라의 재해대책 분석

안무업,황성오,임경수,강성준 대한응급의학회 1993 대한응급의학회지 Vol.4 No.2

Disaster is a any community or regional events that disrupts community functions and activities and cause concern for the lives, health, and property of the citizens of that community. Successful management of disaster requires adequate planning and practice drills. Emergency medical service must play an important role in disaster management because any disaster produces various types of patients who need emergent care. We tried to analyse korean disaster planning in review of three recent disasters including aircraft crash, ship submergence, and road traffic accident. The result of disaster survey shows that there are many defects in Korean disaster plan at the stage of notification, propagation, rescue, stabilization and withdrwal and emergency medical service system is not being involved in disaster management because korean disaster plan is a civil-defence model. We conclude that current korean disaster plan is inadequate for management of disaster and it should be reinforced.

응급센터내에서의 Do-Not-Resuscitate Order

김영식,황성오,이부수,안무업,임경수,강성준 대한응급의학회 1993 대한응급의학회지 Vol.4 No.2

Do-not-resuscitate(DNR) decision in certain patients is a important part of patient management. The use of DNR order has been widely recognized in hospitalized patients, but there has been little discussion of the use of DNR order in emergency department. DNR decision in emergency department is difficult because there is no previous contact between physician and patient. To identify the medical reasons of the DNR decision and the process of the DNR in the emergency department, 293 DNR patients in emergency department during 1 year and 36 physicians having experienced DNR decision were studied. Reasons for DNR are irreversible states from brain damage or acute illness(63%), chronic irreversible illness(15%), prolonged cardiac arrest over 30 minutes(16%), physical injuries including decapitation(1%) and family's hope(5%). Almost DNR(72%) were decided by physicians. 72% of DNR decision were not documented. Cardiopulmonary resuscitation was attempted before DNR decision in 38% of the patients and 17% of CPR attempts were unnecessary. Almost physician(88%) replied that physician should discuss resuscitation with family and process of DNR decision should be documented.