• Title/Summary/Keyword: 순환수

Search Result 4,854, Processing Time 0.046 seconds

당말녕(糖末寧)을 위주(爲主)로 당뇨병(糖尿病)의 주위신경병변(周圍神經病變)을 치료(治療)하는 임상연구(臨床硏究)

  • 우세가
    • Journal of Haehwa Medicine
    • /
    • v.5 no.2
    • /
    • pp.501-501
    • /
    • 1997
  • 당뇨병성(糖尿病性) 주위신경병변(周圍神經病變)은 당뇨병(糖尿病)에서 가장 많이 볼 수 있는 삼대합병증(三大合倂症) 중(中)의 하나이다. 환자(患者)의 임상표현(臨床表現)은 사고(四股) 및 구간부(軀幹部)가 마목(麻木)하고,동통(疼痛)이 칼로 베는 듯하거나 침(鍼)으로 찌르는 듯하여 참기 힘들며, 환자(患者)로 하여금 작업능력(作業能力)을 상실(喪失)하게 하고 휴식(休息)과 수안(睡眼)에 엄중(嚴重)한 영향(影響)을 준다. 지금까지 국내외(國內外)에서는 아직 효과적(效果的)인 치료방법(治療方法)이 없다. 우리는 임상(臨床)에서 관찰(觀察)해 본 결과(結果), 이 병(病)의 임상표현(臨床表現)인 "사고마목(四股麻木), 자통(刺痛), 야간가중(夜間加重), 통처고정(痛處固定)"의 특징(特徵)이 중의임상(中醫臨床)에서 표현(表現)되는 "혈어형(血瘀型)" 동통(疼痛)과 완전(完全)히 상동(上同)하였다. 우리는 "활혈화어(活血化瘀), 통락지통(通絡止痛), 거어생신(祛瘀生新)"을 치료원칙(治療原則)으로 중약복방(中藥復方) 제제(制劑) "당말녕(糖末寧)"을 제조(製造)하여 이 병(病)을 치료(治療)하는데 만족(滿足)스러운 임상치료효과(臨床治療效果)를 거두었다. 전체(全體)의 병례(病例)는 모두 우리 과(科)의 입원환자(入院患者)로써 모두 45례(例)인데, 병기(病機)에 따라 양조(兩組)로 나누었다. 관찰조(觀察組) 30례(例) 중(中)에는 남성(男性)이 19례(例)이고 여성(女性)이 12례(例)이며, 年齡(연령)은 25세(歲)에서 68세(歲)까지로 평균연령(平均年齡)이 49.8세(歲)이다. I형(型) 당뇨병(糖尿病)이 10례(例)이고 II형(型) 당뇨병(糖尿病)이 20례(例)이며, 당뇨병(糖尿病)의 병정(病程)은 6개월(個月)에서 17년(年)사이로 평균(平均) 7.1 년(年)이다. 주위신경병변(周圍神經病變)의 병정(病程)은 2주(周)에서 3년(年)까지로 평균(平均) 1년(年)이다. 대조조(對照組)는 15례(例)로 남성(男性)이 8례(例)이고 여성(女性)이 7례(例)이며, 연령(年齡)은 20세(歲)에서 65세(歲)까지로 평균(平均) 49세(歲)이다. I형(型) 당뇨병(糖尿病)이 7례(例)이고 II형(型) 당뇨병(糖尿病)이 8례(例)이며, 橋民病의 병정(病程)은 3개월(個月)에서 12년(年)까지로 평균(平均) 7.5년(年)이다. 주위신경병변(周圍神經病變)의 병정(病程)은 1개월(個月)에서 3년(年)까지로 평균병정(平均病程)은 11.6개월(個月)이다. 양조(兩組)사이의 병정(病程)은 현저(顯著)한 차이는 없으나 서로 비교(比較)해 볼만하다. 당말녕(糖末寧)은 주(主)로 삼궁(三芎),원호(元胡), 당귀(當歸), 계혈승 등(等)의 약물(藥物)로 조성(組成)되었고, 약제실(藥劑室)에서 濃縮液(농축액)(매(每) ml당(當) 생약량(生藥量) 2.5g 함유(含有))으로 제조(製造)하였다. 관찰조(觀察組)는 매차례(每次例) 당말녕(糖末寧) 50ml를 하루 세번씩 복용(服用)하였고; 대조조(對照組)는 비타민 $B_1$, 비타민 $B_6$을 각각(各各) 20mg씩 하루 세차례 복용(服用)하였다. 양조(兩組) 모두 사주(四周)를 한번의 치료료정(治療療程)으로 하였다. 우리는 모두 45례(例)의 환자(患者)를 관찰(觀察)하였는데, 그 중(中) 관찰조(觀察組)가 30례(例)이고 대조조(對照組)가 15례(例)이다. 임상표현(臨床表現) 분급(分級)과 신경근전도(神經筋電圖)(운동신경(運動神經)과 감각신경(感覺神經)의 전도(電圖) 속도(速度))를 치료(治療) 전(前)과 후(後)의 대조지표(對照指標)로 하였고. 매(每) 4주(周)를 한개의 료정(療程)으로 총(總) 1-2개(個)의 료정(療程)을 진행(進行)하여 比較硏究(비교연구)하였다. 총유효율(總有效率)은 96.7%이고 총현효율(總顯效率)은 50%로써 대조조(對照組)보다 뚜렷하게 높았다. 치료전(治療前) MNCV와 SNCV를 측정(測定)한 것은 당말녕(糖末寧)이 당뇨병(糖尿病) 주위신경병변(周圍神經病變) 환자(患者)의 신경전도속도(神經電圖速度)를 명확(明確)하게 개선(改善)하였음을 표현(表現)하고 있다. 신경근전도(神經筋電圖)에서 자발전위(自發電位)는 눈에 띄게 감소(減少)되고 소력수축(小力收縮)의 평균시한(平均時限)은 명확(明確)히 연장(延長)되었으며 다상전위(多相電位)는 명확(明確)하게 증가(增加)되었는데, 이는 신경지측(神經支測)이 재생(再生)되고 회복(恢復)하였음을 설명(說明)하고 있다. 중약복방제제(中藥復方制劑) "당말녕(糖末寧)"이 본병(本病)을 치료(治療)하는 기전(機轉)은 여러 방면(方面)일 것이다. 그 중(中) 微循環(미순환)을 개선(改善)하고 적혈구(赤血球)의 변형성(變形性)을 향상(向上)하여 신경세포(神經細胞)에 혈액(血液)과 산소공급(酸素供給) 및 영양공급(營養供給)을 향상(向上)함으로써 神經損傷(신경손상)의 수정(修整)과 회복(恢復)을 촉진(促進)하는 것이 주요(主要)한 일환(一環)이 될 것이다.

  • PDF

A Study on the Estimation of Ecological Footprint in Gyeongsangbuk-do for Comparison of Environmental Capacity of Each Local Government (자치단체별 환경용량 비교를 위한 경상북도지역 생태발자국 추정연구)

  • Kang, Kee-Rae;Kim, Hee-Chae;Kim, Dong-Pil;Oh, Hyun-Kyung;Cho, Kwang-Jin;Shin, Young-Ho
    • Korean Journal of Environment and Ecology
    • /
    • v.28 no.6
    • /
    • pp.769-778
    • /
    • 2014
  • The rapid urbanization and increase in population due to industrialization have led to the extension of cities and the reduction in naturality as a necessity. Now, it is the biggest threat to virtuous circle of ecosystem. With the expansion of common recognition that this ecological crisis would be accompanied by the crisis of mankind, many countries all around the world are conducting researches to indicate the optimum consumption level of individual as an index in addition to cross-national environmental indicators such as ESI, EPI and SDI, by measuring environmental consumption of state, local government or individual, and comparing each region. Based on this background, this research was carried out to estimate the environmental capacity of 23 local government in Gyeongsangbuk-do. The result of EF estimation showed that EF value necessary for life per head in Gyeongsangbuk-do was 0.9534, and it showed an ecological deficit of 25.3 percent when analyzing it in consideration of the ecological capacity. Also, among the local governments in Gyeongsangbuk-do, Youngduk-gun displayed the highest EF, and Ulleung-gun displayed the lowest EF. But when analyzing the ecological deficit in consideration of the ecological capacity of each region, Gumi-city showed the greatest ecological deficit, and Youngyang-gun showed the biggest ecological capacity. The environmental capacity estimated in this study is to digitize the ecological capacity and ecological deficit of each local government in Gyeongsangbuk-do. The estimated optimum environmental capacity of each local government suggests the scale of environmental preservation and proper development and furthermore, could be used as fundamental data for persuading members of each local government when selecting a location of development facility or preservation area.

Change of Serum Levels of C-Reactive Protein After Coronary Angioplasty and Its Effects on Clinical Restenosis (협심증 환자에서 관동맥중재술에 따른 C-reactive Protein의 변화 및 임상경과)

  • Park, Jong-Seon;Hong, Gu-Ru;Lee, Chae-Hoon;Shin, Dong-Gu;Kim, Young-Jo;Shim, Bong-Sup
    • Journal of Yeungnam Medical Science
    • /
    • v.18 no.2
    • /
    • pp.215-225
    • /
    • 2001
  • Background: There are many evidences that inflammation is an important determinant of the development of atherosclerosis and one of the systemic markers of inflammation, C-reactive protein(CRP), is associated with extent of coronary artery disease and risk of coronary events. We assessed the time response of CRP response after coronary angioplasty and it's influence on the clinical restenosis in angina patients. Materials and Methods: Patients included 36 angina patients undergoing single vessel angioplasty. Levels of CRP were measured before and 12, 24, 48, and 72 hours after angioplasty. Clinical restenosis was assessed at 6 months after procedure. Results: Baseline CRP level was $0.30{\pm}0.01$ mg/dL in stable and $0.46{\pm}0.28$ mg/dL in unstable angina patients(p<0.05). After angioplasty, CRP level was increased with peak at 24 hour and persisted to 72 hours after angioplasty. At 24 hour after angioplasty, the magnitude of CRP change was $0.32{\pm}0.31$ mg/dL in stable and $0.79{\pm}0.73$ mg/dL in unstable angina patient(p<0.05). The change of CRP level was not associated with troponin-T after angioplasty. In unstable angina patients, clinical restenosis was developed in 8% of patients with low baseline CRP levels and in 50% of those with high baseline CRP levels more than 0.6 mg/dL(p<0.05). Conclusion: In unstable angina patients, inflammatory response is more increased than stable angina patients, and increased inflammatory response effects on the restenosis after coronary angioplasty.

  • PDF

Literature Review on the Incidence and Risk Factor of Oral Cancer (구강암의 발생현황과 원인)

  • Han, Ji-Hyoung;Kim, Eung-Kwon;Lim, Soon-Hwan;Kim, Chang-Hee
    • Journal of dental hygiene science
    • /
    • v.12 no.5
    • /
    • pp.451-458
    • /
    • 2012
  • The purpose of this study was to examine pervasive trends in oral cancer in different countries in an effort to discuss what to do to prevent cancer and drop a death rate. The materials of the study were selected from among articles of oral cancer by searching risk factor and epidemiology at a website (www.oraloncology.com). As a result of analyzing the selected literature, it's found that in our country, the percentage of oral cancer in total cancer dropped but the number of oral cancer patients was on the rise every year. In foreign countries, the number of oral cancer patients was on the increase as well, whereas the lethality dropped. In terms of demographic characteristics, the incidence rate of oral cancer was higher among men than women overall. The incidence rate of oral cancer was larger among older people. The major causes of oral cancer were smoking and drinking. To reduce the incidence rate of oral cancer, every possible institutional, administrative and legal measure should be taken to ensure of anti-smoking policies, and publicity of moderation in and abstinence from drinking should be reinforced. The additional causes of oral cancer were demographic characteristics by country and region. The incidence of oral cancer was under the influence of that was affected when the level of personal economy and education was low. Therefore it's important to redress social imbalance within a country and among countries to remove socioeconomic divide. As the oral cancer patients has increased every year, the incidence rate of it should accurately be grasped, and sustained research efforts should be made in consideration of demographic characteristics. Early diagnosis, public oral health education and preventive policies are all required to decrease the incidence rate of oral cancer.

The Effect of Endotoxin on Gene Expression and Total Amount of Surfactant Protein A (내독소가 Surfactant Protein A의 유전자 발현과 총단백량에 미치는 영향에 관한 실험적 연구)

  • Moon, Doo-Seop;Sohn, Jang-Won;Yang, Seok-Chul;Yoon, Ho-Joo;Shin, Dong-Ho;Park, Sung-Soo
    • Tuberculosis and Respiratory Diseases
    • /
    • v.49 no.6
    • /
    • pp.703-714
    • /
    • 2000
  • Background : Surfactant protein A (SP-A) is important in the regulation of surfactant secretion, synthesis and recycling. SP-A has important roles in regulating surfactant metabolism as well as in determining surfactant's physical properties. Since systemic sepsis is one of the common causes of acute respiratory distress syndrome (ARDS) and abnormalities in surfactant function have been described in ARDS, the authors investigated the effects of endotoxemia on the accumulation of mRNA encoding SP-A and SP-A protein content. Methods : Adult rats were given various doses of intraperitoneal endotoxin from Salmonella enteritidis and sacrificed at different times. SP-A mRNA was measured by filter hybridization method. Lung SP-A protein content was determined by double sandwich ELISA assay using a polyclonal antiserum raised in rabbits against purified rat SP-A. Results : 1) The accumulation of SP-A mRNA in the endotoxin treated group 24 hours after 2mg/kg and 5mg/kg endotoxin treatments was significantly increased 50.9% and 27.3%, respectively, compared to the control group (P<0.001, P<0.025). 2) The accumulation of SP-A mRNA 24 hours in the 5mg/kg endotoxin treated group was significantly increased by 26.5% compared to the control group (P<0.01). 3) Total amount of lung SP-A was not altered at 24 hours by various doses of treatment. Total lung SP-A content 144 hours after endotoxin administration was significantly decreased by 51.4% compared to the control group (P<0.01). Conclusions : The specific regulation of SP-A by various time course in vivo is evident. The late decline in SP-A protein content was unexpected and suggests that SP-A may be differentially regulated during lung inflammation. The functional significance of these alterations remains to be clarified.

  • PDF

The Effect of Three Surface Sealants on Microleakage of Class V Composite Resin Restorations (복합레진으로 수복한 5급 와동의 미세누출에 대한 3종의 레진 표면 전색제의 효과)

  • Lee, Won-Cheol;Ryu, Jae-Jun
    • The Journal of Korean Academy of Prosthodontics
    • /
    • v.47 no.2
    • /
    • pp.182-190
    • /
    • 2009
  • Statement of problem: Microleakage at the occlusal and gingival margin of Class V cavities restored with composite resin has traditionally been considered an obstacle to successful restoration. Purpose: The aim of this study was to assess the effectiveness of three different surface sealants(Fortify, Permaseal and Biscover LV) on the marginal sealing of Class V light-activated composite resin restorations(Z250). Material and methods: Forty noncarious human premolars and molars extracted within a three-month period were selected. Class V cavities with the occlusal margin in enamel and gingival margin in cementum were prepared in both buccal and lingual surfaces. The teeth, randomly assigned in four groups with twenty cavities in each group, were restored with composite resin after applying an adhesive system(Clearfil SE bond). After the finishing and polishing procedures, the restorations were covered with a specific surface sealants, except for the control samples, which were not sealed. After placing restorations, the specimens were thermocycled, and immersed in a 2% methylene blue solution for twenty four hours and sectioned longitudinally. The marginal microleakage was evaluated at the occlusal and gingival interfaces using a microscope and compared among the four groups using ANOVA test and Wilcoxon Rank-Sum test($\alpha$=0.05). Results: Statistical analysis showed that there was significantly less leakage when the surface sealants were used than there was in control group(P<.05). There were no significant differences of microleakage at occlusal and gingival margins among groups. There were no significant differences between microleakage of occlusal and gingival margins in each group. Fortify was not statistically different from control group at the gingival margin(P>.05). Conclusion: Application of surface sealants was an effective method of surface coating in reducing microleakage at occlusal and gingival margins of Class V composite resin restorations. However, it is certain that some microleakage still occurred despite the application of surface sealants, especially gingival margins.

Effects of the Feral Peach (Prunus persica Batsch var. davidiana Max) Extract on the Lipid Compositions and Blood Pressure Level in Spontaneously Hypertensive Rats (야생 돌복숭아(Prunus persica Batsch var. davidiana Max.) 추출액이 선천성 고혈압 흰쥐의 지질성분 및 혈압 저하에 미치는 영향)

  • Kim, Han-Soo
    • Journal of Life Science
    • /
    • v.16 no.7 s.80
    • /
    • pp.1071-1079
    • /
    • 2006
  • The purpose of this study was to observe the effects of the feeding physiological activity substance in feral peach(Prunus Persica Batsch var. davidiana Max.) extract intake on the improvement of the lipid compositions, apolipoprotein and blood pressure level in spontaneously hypertensive rats(SHR, Wistar strain, male) fed the experimental diets for 33 days. Concentrations of total cholesterol, triglyceride(TG), LDL-cholesterol, free cholesterol and atherosclerotic index in serum were significantly lower in the feral peach extract intake groups[groups 5g% Ex.(basal diet+feral peach 5.0g% extract), 10g% Ex.(basal diet+feral peach 10.0g% extract)] than those in the group Control(basal diet+water). In the ratio of HDL-cholesterol concentration to total cholesterol and HDL-cholesterol concentration, feral peach 5.0g%, 10.0g% extract intake groups(group 5g% Ex. and 10g% Ex.) were higher percentage than in the group Control. However, concentrations of total cholesterol and TC in liver and brain were significantly lower in the groups 5g% Ex. and 10g% Ex. than those in the group Control. But the concentrations of apolipoprotein (Apo) A-I and Apo A-II in serum were significantly higher in the feral peach 5.0g% and 10.0g% extract intake groups(5g% Ex. and 10g% Ex.) than in the control group. However, concentrations of Apo C-II, Apo C-III, Apo E and ratio of Apo B to Apo A-I in serum were fairly reduced in the groups 5g% Ex. and 10g% Ex. than in the control group. The levels of systolic and diastolic blood pressure were significantly lower in feral peach 5g% Ex. and 10g% Ex. groups than control group. However, no significance was found in the effect of among the groups(groups 5g% Ex. and 10g% Ex.). From these results, physiological activity substance in feral peach(Prunus persica Batsch var. davidiana Max.) extracts were effective on the improvement of the lipid compositions and cardiovascular heart disease, hypertension in spontaneously hypertensive rats. And particularly, feral peach extracts were more effective as a therapeutic regimen for the control of blood pressure in hypertension.

Policy suggestions to educate and produce outstanding paramedics in Korea (우수한 1급 응급구조사 인력 양성 및 배출을 위한 정책 제안)

  • Choi, Eun-Sook;Koh, Bong-Yeun;Park, Hee-Jin;Kim, Hyo-Sik;Kwon, Hay-Rran;Choi, Hea-Kyung;Lee, Kyoung-Youl;Yun, Jong-Geun;Hong, Sung-Gi;Cho, Keun-Ja
    • The Korean Journal of Emergency Medical Services
    • /
    • v.22 no.1
    • /
    • pp.7-19
    • /
    • 2018
  • Purpose: With the purpose of educating and producing outstanding paramedics by enhancing their competencies, this study aimed to make policy suggestions to re-establish the education system and improve the national examination and the certification scheme. Methods: This study used focus group interviews and questionnaires to collect data. Totally, there were 277 subjects, including experts from the education and field. Data were collected from September 9 to 20, 2016, and analyzed using SPSS 22.0. Results: To strengthen the curriculum of paramedics, this study suggested 27 courses with 94 credits as the standardized curriculum and derived 9 core competencies of paramedics. For the national examination, this study suggested consolidating written test subjects, adding scenario questions to practical tests, and applying critical criteria to simple practical tests that performs a procedure, grading these tests on a pass/fail basis. In addition, this study suggested converting certification into license, reflecting paramedics' healthcare job characteristics. Conclusion: The quality of emergency medical services in Korea will improve when those with core competencies that originated from the standardized curriculum based on the results of this study acquire their certification through the national test scheme, and the certification management system creates a virtuous cycle to further enhance paramedics' professionalism.

Guidelines of Bioequivalence Studies of Medical Products in Europe (유럽의 의약품 생물학적 동등성 시험 가이드라인)

  • Yoo, Tae-Moo;Yi, Sun-Woo;Park, In-Sook;Suh, Soo-Kung;Ahn, Mee-Ryung;Choi, Hong-Suk;Jin, Sook;Sohn, Soo-Jung;Yang, Ji-Sun
    • Journal of Pharmaceutical Investigation
    • /
    • v.30 no.4
    • /
    • pp.299-307
    • /
    • 2000
  • 생물학적 동등성 시험은 동일 성분을 동량 함유한 제제가 유사조건에서 투여되었을 경우 그 유효성분이 전신순환혈이나 작용부위에서 유용하게 되는 속도 및 양에 큰 차이가 없음을 입증하는 시험이다. 즉 이미 제조허가 되어 시판중인 의약품과 동일한 품목의 제조허가를 받기 위한 경우이거나 생체이용률이 동일함을 증명하기 위해 실시하는 시험이다. 우리 나라에서는 1989년 1월 1일 이후 허가된 전문의약품으로서 신약과 동일한 의약품, 패취제제, 제제개선을 통해 흡수율을 높이는 경우에 생물학적 동등성 시험을 하도록 의무화하고 있다. 미국 FDA는 1975년 6월 생체이용률, 생물학적 동등성에 관한 규제안을 발표하였고, 우리 나라에서도 1988년 10월에 생물학적 동등성 시험 기준을 제정하였다. 유럽에서는 1991년 12월 CPMP(Committee for Proprietary Medicinal Products)에 의해 최초로 "생체이용률 및 생물학적 동등성에 대한 가이드라인"이 채택되었다. 그후 전문가 회의를 거쳐 규정 전반에 관한 것과 일반적 항목에 대한 검토가 이루어져 최종 개정된 가이드라인이 만들어졌다. 현재 in vivo 생체 이용률을 비교하는 생물학적 동등성 시험의 중요성이 증대되고 있고, 국제적으로도 각 국가별 생물학적 동등성 시험의 평가방법이나 기준설정에 대한 연구가 다양하게 이루어지고 있다. 또한 ICH에서도 생물학적 동등성 시험의 국제적 조화를 위한 시도가 이루어지고 있다. 우리 나라의 현행 생물학적 동등성 기준은 1998년 개정된 것을 사용하고 있으나 국제적 발전 추세에 맞추어 기준의 제고를 모색하고 있다. 그 일환으로 유럽의 "의약품의 생체이용률 및 생물학적 동등성 시험 가이드라인"을 소개하고자 한다., globunlin II의 두 component로 분리(分離)되었고 oryzenin은 시료(試料) 육우(陸羽) 132호(號), 등판(藤坂) 5호(號), 관산(關山) 재건(再建)에서는 oryzenin I, oryzenin II, oryzenin III의 3 component를 분리(分離)하였고 팔달(八達), 진흥(振興), 서광(瑞光), 은방주(銀坊主), 다마금(多摩錦), Pin Galw56의 6시료(試料)에서는 oryzenin II, oryzenin III의 2 component만 분리(分離)하였다. 3. 각(各) fraction을 여지전기영동(濾紙電氣泳動)하여 각(各) component의 농도곡선(濃度曲線)에 의해 함량(含量)을 구(求)한 결과(結果) albumin 0.26%, globulin I, 0.35%, globulin II, 0.32%, prolamin, 0.41%, oryzenin I, 0.30%, oryzenin II, 2.23%, oryzenin III, 2.66%이었다.미국의 경우 3일 이내 전화나 FAX로 보고하고, 10일이내 문서로써 보고하도록 되어 있다. 이러한 임상적 안전성 자료 관리에 대한 신속 보고 정의 및 기준에 대해서는 ICH에서도 논의가 되어 Step 4까지 다다르고 있으므로 앞으로 각 국에서의 적용만 남아있는 상태이고 보면 신약의 개발과 더불어 임상시험에서의 부작용등의 안전성 자료 관리에 대한 중요성은 더욱 강조될 것이다.공하는 음식의 섭취정도에도 영향을 주고 있으므로 학생들에게 학부모와 전담교사 및 학교영양사는 학생들에게 이상적인 아침식사에 대한 교육은 물론이고 아침식사를 실천할 수 있도록 다양한 방안에 대해 함께 연구해야 하겠다. 정부차원에서 학교급식에 아침식사 프로그램을 도입할

  • PDF

Occurrences of Uranium and Radon-222 from Groundwaters in Various Geological Environment in the Hoengseong Area (횡성지역 다양한 지질환경에서 지하수 중 우라늄 및 라돈-222 산출특성)

  • Jeong, Chan Ho;Yang, Jae Ha;Lee, Yu Jin;Lee, Yong Cheon;Choi, Hyeon Young;Kim, Moon Su;Kim, Hyun Koo;Kim, Tae Seong;Jo, Byung Uk
    • The Journal of Engineering Geology
    • /
    • v.25 no.4
    • /
    • pp.557-576
    • /
    • 2015
  • Groundwaters in granite, gneiss, and two-mica granite formations, including faults, in the Hoengseong area are examined to determine the relationship between their uranium and radon-222 contents and rock types. The chemical compositions of 38 groundwater samples and four surface water samples collected in the study area were analyzed. Sixteen of the samples showing high uranium and radon-222 contents were repeatedly analyzed. Surface radioactivities were measured at 30 points. The uranium and radon-222 concentrations in the groundwater samples were in the ranges of 0.02-49.3 μg/L and 20-906 Bq/L, respectively. Four samples for uranium and 35 samples for radon had concentrations exceeding the alternative maximum contaminant level of the US EPA. The chemical compositions of groundwaters indicated Ca(Na)-HCO3 and Ca(Na)-NO3(HCO3+Cl) types. The pH values ranged from 5.71 to 8.66. High uranium and radon-222 contents in the groundwaters occurred mainly at the boundary between granite and gneiss, and in the granite area. The occurrence of uranium did not show any distinct relationship to that of radon-222. The radon-222, an inert gas, appeared to be dissolved in the groundwater of the aquifer after wide diffusion along rock fractures, having been derived from the decay of uranium in underground rocks. The results in this study indicate that groundwater of neutral or weakly alkaline pH, under oxidizing conditions and with a high bicarbonate content is favorable for the dissolution of uranium and uranium complexes such as uranyl or uranyl-carbonate.