• 제목/요약/키워드: physical-related stress

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유전 요인과 생활환경 요인의 상호작용이 제2형 당뇨병 발생에 미치는 영향: 한국인유전체역학 조사사업(KoGES) 자료를 이용하여 (Effects of gene-lifestyle environment interactions on type 2 diabetes mellitus development: an analysis using the Korean Genome and Epidemiology Study data)

  • 현수진;전상은
    • Journal of Korean Biological Nursing Science
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    • 제25권1호
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    • pp.73-85
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    • 2023
  • Purpose: This study focused on identifying the interaction effects of genetic and lifestyle-environmental factors on the development of type 2 diabetes mellitus (T2D). Methods: Study subjects were selected from the Korean Genome and Epidemiology Study (KoGES) from 2001 to 2014. Data on genetic variations, anthropometric measurements, biochemical data, and seven lifestyle factors (diet, physical activity, alcohol drinking, smoking, sleep, depression, and stress) were obtained from 4,836 Koreans aged between 40 and 59 years, including those with T2D at baseline (n = 1,209), newly developed T2D (n= 1,298) and verified controls (n = 3,538). The genetic risk score (GRS) was calculated by using 11 single-nucleotide polymorphisms (SNPs) related to T2D development and the second quartile was used as the reference category. A Cox proportional hazards regression model was used to evaluate the associations of GRS and lifestyle factors with T2D risk, controlling for covariates. Results: Multivariate regression analysis revealed that GRS was the strongest risk factor for T2D, and body mass index (BMI), smoking, drinking, and spicy food preference also increased the risk. Lifestyle/environmental factors that showed significant interactions with GRS were BMI, current smoking, current drinking, fatty food preference, and spicy food preference. Conclusions: Interactions between genetic factors and lifestyle/environmental factors were associated with an increased risk of T2D. The results will be useful to provide a new perspective on genetic profiling for the earlier detection of T2D risk and clues for personalized interventions, which might be more effective prevention strategies or therapies in individuals with a genetic predisposition to T2D.

청소년의 비만과 관련된 요인 분석 및 관련 요인의 변화에 대한 단면조사연구 -청소년건강행태조사를 이용하여- (Factors related to adolescent obesity and changes: a cross-sectional study based on the Korea Youth Risk Behavior Survey)

  • 이보라;류호경
    • 대한지역사회영양학회지
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    • 제28권5호
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    • pp.363-375
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    • 2023
  • Objectives: The objective of this study was to identify factors associated with adolescent obesity, as well as any new factors that correlated with a change in the rate of obesity over time. Methods: The study used 5-yearly data collected by the Korea Youth Risk Behavior Survey starting from the year 2006 up until 2021 (data from 2nd, 7th, 11th, and 17th surveys were analyzed). Factors such as demographics, dietary factors, health behavioral factors, and mental health factors were studied. All data were analyzed using IBM SPSS 27.0, employing chi-square tests and multiple logistic regression analysis. Results: This study included data from a total of 255,200 participants. Factors contributing to obesity varied with time. Over the survey duration of 15 years, low academic achievement, parents with low levels of education, low frequency of fruit consumption, low frequency of fast food intake, long periods of being seated, and high levels of stress were significantly associated with a high rate of obesity. Factors that showed a new correlation with an increase in obesity rates included living with single parents, low frequency of muscle strengthening exercises, and experiencing intense sadness and despair in the past year. Factors that were correlated with a change in obesity rates over time included household economic status, frequency of carbonated beverage consumption, frequency of intense physical activity, and frequency of alcohol consumption. Breakfast intake and smoking were not significantly associated with obesity rates in the 15-year period. Conclusions: While several factors associated with obesity remained consistent over time, several new factors have emerged in response to social, economic, and environmental changes contributed to a change in obesity rate over time. Therefore, to prevent and manage adolescent obesity, continuous research into the new emergent factors contributing to obesity is needed.

A Study on Relationship between Physical Elements and Tennis/Golf Elbow

  • Choi, Jungmin;Park, Jungwoo;Kim, Hyunseung
    • 대한인간공학회지
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    • 제36권3호
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    • pp.183-196
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    • 2017
  • Objective: The purpose of this research was to assess the agreement between job physical risk factor analysis by ergonomists using ergonomic methods and physical examinations made by occupational physicians on the presence of musculoskeletal disorders of the upper extremities. Background: Ergonomics is the systematic application of principles concerned with the design of devices and working conditions for enhancing human capabilities and optimizing working and living conditions. Proper ergonomic design is necessary to prevent injuries and physical and emotional stress. The major types of ergonomic injuries and incidents are cumulative trauma disorders (CTDs), acute strains, sprains, and system failures. Minimization of use of excessive force and awkward postures can help to prevent such injuries Method: Initial data were collected as part of a larger study by the University of Utah Ergonomics and Safety program field data collection teams and medical data collection teams from the Rocky Mountain Center for Occupational and Environmental Health (RMCOEH). Subjects included 173 male and female workers, 83 at Beehive Clothing (a clothing plant), 74 at Autoliv (a plant making air bags for vehicles), and 16 at Deseret Meat (a meat-processing plant). Posture and effort levels were analyzed using a software program developed at the University of Utah (Utah Ergonomic Analysis Tool). The Ergonomic Epicondylitis Model (EEM) was developed to assess the risk of epicondylitis from observable job physical factors. The model considers five job risk factors: (1) intensity of exertion, (2) forearm rotation, (3) wrist posture, (4) elbow compression, and (5) speed of work. Qualitative ratings of these physical factors were determined during video analysis. Personal variables were also investigated to study their relationship with epicondylitis. Logistic regression models were used to determine the association between risk factors and symptoms of epicondyle pain. Results: Results of this study indicate that gender, smoking status, and BMI do have an effect on the risk of epicondylitis but there is not a statistically significant relationship between EEM and epicondylitis. Conclusion: This research studied the relationship between an Ergonomic Epicondylitis Model (EEM) and the occurrence of epicondylitis. The model was not predictive for epicondylitis. However, it is clear that epicondylitis was associated with some individual risk factors such as smoking status, gender, and BMI. Based on the results, future research may discover risk factors that seem to increase the risk of epicondylitis. Application: Although this research used a combination of questionnaire, ergonomic job analysis, and medical job analysis to specifically verify risk factors related to epicondylitis, there are limitations. This research did not have a very large sample size because only 173 subjects were available for this study. Also, it was conducted in only 3 facilities, a plant making air bags for vehicles, a meat-processing plant, and a clothing plant in Utah. If working conditions in other kinds of facilities are considered, results may improve. Therefore, future research should perform analysis with additional subjects in different kinds of facilities. Repetition and duration of a task were not considered as risk factors in this research. These two factors could be associated with epicondylitis so it could be important to include these factors in future research. Psychosocial data and workplace conditions (e.g., low temperature) were also noted during data collection, and could be used to further study the prevalence of epicondylitis. Univariate analysis methods could be used for each variable of EEM. This research was performed using multivariate analysis. Therefore, it was difficult to recognize the different effect of each variable. Basically, the difference between univariate and multivariate analysis is that univariate analysis deals with one predictor variable at a time, whereas multivariate analysis deals with multiple predictor variables combined in a predetermined manner. The univariate analysis could show how each variable is associated with epicondyle pain. This may allow more appropriate weighting factors to be determined and therefore improve the performance of the EEM.

한국문화에서 주관안녕에 영향을 미치는 사회심리 요인들 (Correlates of Subjective Well-being in Korean Culture)

  • 한덕웅
    • 한국심리학회지 : 문화 및 사회문제
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    • 제12권5호_spc
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    • pp.45-79
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    • 2006
  • 필자와 공동연구자들(2002)이 선행연구에서 개발한 주관안녕척도를 사용하여 한국문화에서 주관안녕에 영향을 미치는 변인들을 알아낸 연구 결과들을 개관하고, 국내외 연구들과 비교하여 시사점을 논의하고, 장래 연구할 과제들도 제안하였다. 먼저 주관안녕에 영향을 미치는 선행요인들로 ① 개인차와 인구통계 변인들, ② 개인과정 요인들, ③ 대인과정 요인들 및 ④ 한국문화의 요인으로 사회규범에 따른 행동을 다룬 연구 결과들을 개관했다. 또한 노인을 대상으로 주관안녕이 동시점에서 신체건강의 예측에 기여하는 수준과 아울러 1년 이상이 경과한 시점에서 종단적으로 신체건강이나 생사에 어떤 영향을 미치는지도 알아냈다. 본 논문은 한국문화에서 필자와 공동연구자들이 수행한 실증연구의 결과들과 연결시켜서 주관안녕을 연구하는데 따르는 이론, 방법 및 과제들을 구체적으로 논의함으로써 장차 문화비교 연구와 아울러 국내 연구에 시사점들을 제시한데 의의가 있다.

관절염환자(關節炎患者)의 특성(特性)에 대한 조사(調査) 연구(硏究) (A Research in the Characteristic of Arthritis Patienth)

  • 강점덕;남철현;김기열
    • 대한예방한의학회지
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    • 제1권1호
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    • pp.149-165
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    • 1997
  • In order that, investigating the feature of patients suffering arthritis, analysing its contents, and grasping a Primary factor affecting it, I might offerbasic datas which could help to plan and perform healthy affairs to thake precautions beforehand, I have investigated, analysed, and studied a total of 320 patients suffering arthritis, who have received physiotherapy in hospital located in Teaegu area for five months, from November 1 1995 to March 30 1996, of which summary and conclusion is this. 1. The general feature of patients in investigative objects In the distribution of the distinction of sex, men accounted for 26.9% and women, for 73.1%, and, in the fistribution of age, 60-year-old or more, most for 27.2% and from 20 to 29 years old, least for 14.0%. In the distinction of a vocation, housewives most accounted for 34.7% and students(jobless men), least for 19.3%. In the distinction of a matrimonial state, married persons most accounted for 76.7% and people living alone(divorce, separation by death, separation), least for 11.4%. In the distinction of an economic state, the middle classes most accounted for 73.5% and the upper classes, least for 2.9%. In the distinction of their academic careers, graduates of a primary school most accounted for 26.9% and graduates of university, for 14.1%, of which patients, having the ability to decode the national language, reached to 11.3%. In the distinction of the house form, people living in independent houses most accounted for 76.4% and residents in apartment(having an elevator), least for 9.4%. 2. In the distribution of the recurring state in the distinction of the feature, the recurring group was more than the group of patients falling that ill at first as 62.2% and in the distinction of the feature of the recurring group, the recurring group turned high in case of men being from 50s to 60s years old or more, people living alone (divorce, separation by death, separation), students (joblessmen), people working in farming, stockbeeding, forestry, fisheries, a simple labour, graduates of a primary school I having the ability to decode the national language, the upper classes, people part two years since they begined to suffer arthritis, people who had members having ever experienced arthritis among families. 3. In the distribution of arthritis on the distinction of bodily pars, a knee articulation most accounted for 50.2% and the articulation of fingers, for 8.8%, wile the simultaneous, several parts (multiple) accounted for 35.1%. In the distinction of the feature, arthritis of a knee turned high in case of men being from 20s to 30s years old, unmarried persons, people having academic careers of university, the middle classes, residents in apartment (having stairs). In the dictnction of a feature the case of several parts (multiple) turned high in case of women being from 50s to 60s years old or more, people living alone (divorce, separation by death, separation), people having the ability to decode th. national language, the graduates of a primary school, the upper classes, residents in apartment (having elevator). 4. In the distribution of arthritis on e distinction of a contracting term, two years or more most accounted for 51.6% and the case of contacting from one year to two years, for 15.3%. Analysing the distinction of the feature, the case of two years or more turned high in case of women being from 50s to 60s years old or more, people living alone (divorce separation by death, separation), the upper classes, people having the ability to decode the national language, residents in apartment (having elevator). 5. In the distribution of an treatment institution before patients came to help, their not curing most accounted for 39.1%, general, orthopedic, neurological surgery (physical therapy), for. 20.0%, and th. therapy of Chinese medicine (acupuncture, moxacautery, Chinese medicine), for 17.5%, and a pharmacy (medical therapy), for 13.4%. The case of patients not curing, in the distinction of a feature, turned high in case of men 20s years old, unmarried, the lower classes, people having academic careers of university, residents in apartment (having elevator). 6. In e distribution of the extent of satisfaction with treatment, common most accounted for 54.4% and some satisfaction, for 32.8%. The case of common, in the distinction of a feature, turned high, in case of men living alone from 50s to 60s years old (divorce, separation by death, separation), married persons, the upper classes, people having academic careers of university, residents in independent house, residents in apartment (having elevator), 7. In the distribution of the degree of knowledge of the cause of arthritis, patients knowing that the cause is to use very much a articulation in normal times most accounts for 60.1%, and patients knowing the state of short nutrition as a cause, for 2.5%. The case of patients knowing that the cause is to use very much in normal times, in the distinction of a feature, turned high in·case of ment being 20s and 60s years old or more, unmarried persons, e lower classes, people having the ability to decode. the national language, people having academic careers of university, residents in apartment (having stairs), 8. In the distribution of the state of physical exercise before arthritis contracted, patients exercising very much on the whole most accpimend for 40.3%, and patients not exercising, for 34.7%. The case of patients exercising very much on the whole, in the distinction of the feature, turned high in case of men being from 50s to 60s years old or more, people living alone(divorce, separation by death, separation), the lower classes, people having the ability to decode the national language, graduates of a primary school, residents in apartment (having elevator). 9. In the taste of patients suffering from arthritis, while the group of patients falling that ill at first and the recurring group didn't smoke cigarets, during alcohol and coffee on the whole, and the group of patients falling once again that ill drank a cup of distilled linquor and three cup of coffee or more on the whole per one day, and the group of patients falling that ill at first liked sort of vegetables and the recurring group liked very much sons of vegetables and fresh and meat in their loving food normal times. 10. Analysing the distribution on the dining table used by patients and the structure of a powder room, at first, in the structure of a powder room, the group of patients filling that ill have a toilet stool using as their sits, and a Bush toilet on the whole, and the recurring group, a toilet stool using as their sits and conventional type, and in the structure of a dinning table, the group of patients falling that ill at first and the recurring group turned high, each as 66.9% and 6.3%, who have a dining table carring here and there. 11. In the distribution of patients of arthritis in relation to stress, the case that they feeled severly symptoms of arthritis when thay got stress, turned high, each, as 78.6% in the recurring poop, and the case not knowing, as 61.5% in the first group. In the extent of stress normal times, the case that they got much stress on the whole turned high, each, as 72.4% in e recurring group, and the care that got less stress on the whole, as 60.0%. 12. In the distribution on the distinction of symptoms and impedimental extent, the recurring group turned high in each variable. Analysing the feature of the recurring group, in the distinction of symptoms, the case that they fooled much that the node of an articulation is stiff, turned high, as 71.6, and in the distinction of treatment before. patients came to helpk, the theraphy of Chinese medicine (physical theraphy), as 84.4%, the theraphy of Chinese medicine (acupuncture, moxacautery, Chinese medicine), as 73.2%, and in the distinction of the satisfing extent on treatment, the case of comman, as 72.3%, and in the cause of arthritis, the case not recruiting their health after a birth, as 68.5%, and the case not recovering wholely an articulation having got hurt, as 62.8%, and in the state of physical exercise before they begined suffering from arthritis, the case exercising very much on the whole, (as 74.2%), and in the extent of subjective impediment, the case of not being able to act almost, as 66.7%, the case of acting but feeling some hard, as 66.3%. 13. The correlation in variables in relation to arthritis Analysing realted variables, the recurring frequency showed correlation with such as the extent that patients got stress normal times, and the exercising state before suffering arthritis, and showed contra-correlation with academic careers, the wights, coffee. The cigaret, e loving food of taste, showed corralation with the weight, stature, alcohole as the loving food of taste. On the basis of this result medical members of heal, who are related to the regular education, public education or development of this program, should be concerned to prevent orthris.

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청소년의 생활습관과 흡연경험의 연관성: 흡연경험자와 비경험자의 비교 중심으로 (Association between adolescents lifestyle habits and smoking experience: Focusing on comparison between experienced and non-experienced smokers)

  • 강세리;이경희;조상옥
    • 한국학교ㆍ지역보건교육학회지
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    • 제25권2호
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    • pp.27-44
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    • 2024
  • 목적: 본 연구는 청소년의 생활습관과 흡연경험의 연관성을 알아보고 영향요인을 파악하여 청소년 흡연 예방을 위한 기초자료 제공하고자 하였다. 방법: 청소년건강행태조사 제17차(2021년) 자료를 활용한 2차 자료 분석으로 설계하였다. 연구대상은 796개 학교 54,848명의 자료를 사용하였으며 연구변수는 일반적특성, 흡연유무와 생활습관인 식습관, 신체활동습관, 수면습관, 스트레스인지정도를 사용하였다. 분석방법으로는 연구대상의 일반적 특성은 빈도분석, 흡연유무에 따른 일반적특성과 생활습관의 차이는 빈도분석과 Pearson Chis-square 검정을 실시하였다. 생활습관이 흡연경험에 미치는 영향요인을 알아보기 위해 다항 로지스틱 회귀분석을 실시하였다. 모든 분석은 IBM SPSS Statistics 28을 이용하였고 p<0.05인 경우 통계적으로 유의하다고 판단하였다. 결과: 일반적 특성에서 흡연경험이 있는 그룹에서 흡연경험이 없는 그룹보다 남학생이 더 많았다(67.4% : 50.1%)(p<0.001). 흡연경험 유무에 따른 생활습관의 차이를 분석한 결과 흡연경험이 있는 그룹에서 아침식사를 0일 하는 경우(27.7%), 과일섭취를 0번하는 경우(17.8%), 패스트푸드를 매일 3번이상 먹는 경우(0.9%)가 더 많았다(p<.001). 흡연경험 유무에 따른 신체활동습관은 흡연경험이 있는 그룹에서 60분 이상 숨이 찬 정도의 신체활동을 주 7회 하는 경우(8.4%), 고강도 신체활동을 주 5일 이상 하는 경우가(18.7%)가 더 많았다(p<.001). 수면을 통해 피로회복 정도는 흡연경험이 있는 그룹에서 전혀 충분하지 않다(21.6%)와 평상시 스트레스를 느끼는 정도가 아주 심한 경우(17.2%)가 흡연경험이 있는 그룹에서 더 많았다(p<.001). 생활습관과 흡연과의 연관성을 분석한 결과, 아침식사를 0일 하는 경우가 매일 하는 경우 보다 흡연가능성이 증가하였으며(OR=1.759, p<.001), 과일섭취를 0번 섭취하는 경우가 매일 3번 이상 섭취하는 경우보다 흡연경험 가능성이 증가하였다(OR=1.921, p<.001). 패스트푸드 섭취를 0번 하는 경우는 매일 3번 이상하는 경우보다 흡연경험 가능성이 감소하였다(OR=0.206, p<.001). 수면으로 피로회복정도가 충분한 경우는 충분하지 않는 경우보다 흡연경험 가능성이 감소하였으며(OR=0.458, p<.001), 스트레스를 가장 많이 느끼는 경우는 스트레스를 느끼지 않는 경우보다 흡연경험 가능성이 증가하였다(OR=1.260, p<.05). 결론: 청소년의 생활습관은 흡연경험과 연관성이 있음을 알 수 있었다. 이를 통해 청소년의 흡연 예방을 위한 정책 및 프로그램 개발 시 흡연행위 뿐만아니라 생활습관을 고려하여 다각적인 측면으로 교육 및 지도하는 방안을 모색할 수 있을 것이다. 이에 본 연구가 건강하고 올바른 생활습관 개선을 통한 청소년의 흡연 예방을 위한 기초자료로 활용될 수 있기를 기대한다.

온담탕(溫膽湯)과 사물안신탕(四物安神湯) 및 시호소간산(柴胡疏肝散)이 비만(肥滿)과 스트레스에 미치는 영향(影響) (Effects of Ondamtang, Samulansintang and Shihosogansan Water Extract on the Obesity and Stress)

  • 이상용;류희영
    • 동의신경정신과학회지
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    • 제3권1호
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    • pp.25-45
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    • 1992
  • Many phychiatrists have reported that the change of serotonin concentration would cause mental disorder and affect the pathological conditions such as schizophrenia, depression and eating behabior. The end product of serotonin metabolism was excreted as 5-HIAA in urine. Serum lipids, according to the report, were concerned with obesity, said it was. This study aims to observe the changes of plasma serotonin, urinary 5-HIAA and serum lipids, making use of Fat Cell Mass rate of 27 normal persons and 42 psychosomatic patients. For this, I also observed the change of serotonin, 5-HIAA and lipids of the psychosomatic patients by the use of 3 kinds of herbs as treatment medication on the basis of physical symptoms and the results were obtained as follows; 1. Urinary 5-HIAA is correlated with the body water rate(r=0.381), while reversely correlated with the Fat Cell Mass rate(r=-0.330). 2. Compared the control group with the patients group for the serum lipids value, they showed the significant results ; $146.4{\pm}5.71$ mg/dl and $166.9{\pm}6.56$ mg/dl in the total cholestrol value over- weights, $471.2{\pm}42.99$ mg/dl in the total lipid value, and $158.1{\pm}6.50$ mg/dl and $181.1{\pm}6.30$ mg/dl in the phospholipid of the obesity, respectively. 3. With comparison of each group to other group to the others for Fat Cell Mass rate, the total cholesterol showed the significant differences when the Fat Cell Mass rate was 20% or more, HDL-cholesterol value when 30% or more, and triglyceride when 30% or more, respectively. 4. there was significant variations in the relations between Fat Cell Mass rate and body water, which body mass index was increased as the body water was decreased. 5. Fat Cell Mass rate was correlated with Cholesterol(r = 0.420), triglyceride (r = 0.443), and $\beta$-lipoprotein(r = 0.450) of serum lipids, while reversely correlated with HDL -Cholesterol(r = -0.354) and urinary 5- HIAA had the correlation coefficient of -0.330. 6. What related with body water rate urinary 5-HIAA (r = 0.381) and $\beta$-lipoprotein(r = -0.405). 7. there were significant changes in the total cholesterol value and HDL-Cholesterol Value of serum lipids after dose of Ondamtang, significant increase in the 5-HIAA value after dose of Samulansintang, and significant devrease in the Trigylceride value of serum lipids after dose of Shihosogansan. As a result, it was seen that there was direct correlations among the Fat Cell Mass, urinary 5-HIAA, and serum lipids and stress from the mental conditions was not correlated directly to Serotonin, 5-HIAA, and serum lipids. I would like to conclude, therefore, that the detailed study should be performed on the function of serotonin of hypothalamus.

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탈북여성들의 남한사회에서의 차별 경험과 트라우마 경험의 재현에 관한 탐색적 연구 (North-Korean-Refugee Women's Experience of Discrimination in South Korea and Reemergence of Trauma Experience)

  • 성정현
    • 한국콘텐츠학회논문지
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    • 제14권5호
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    • pp.117-131
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    • 2014
  • 본 연구는 외상사건을 경험한 탈북여성들이 남한생활에서 경험하는 어려움과 남한에서의 부정적 경험으로 그들이 갖고 있는 트라우마의 재현을 탐색하는데 목적이 있다. 이를 위해 외상후 스트레스 장애를 경험하는 5명의 탈북여성을 대상으로 초점집단면접과 서면조사를 실시하였다. 조사결과, 참여자들은 굶주림, 투옥, (성)폭력, 인신매매, 가족관계의 단절, 죽음의 목격 등 극단적 사건을 경험하였으며, 이로 인해 과거 기억의 회상과 회피, 악몽에 시달리는 것으로 나타났다. 또 외상후 스트레스를 겪는 상황에서 이들은 남한에서 차별과 부당한 대우, 낙인, 적과의 동침 상황, 끝나지 않는 빈곤, 용서불가, 그리고 자살의도 등과 같은 트라우마 경험의 재현을 겪고 있었다. 이런 트라우마 경험의 재현 경험으로 인해 연구 참여자들은 남한 입국에 대한 후회와 분노, 그리고 타인과의 관계 철회와 무희망 등의 부정적 정서를 경험하는 것으로 나타났다. 이런 부정적 정서의 근간에는 부정적인 사회적 인식과 편견이 자리 잡고 있어 이에 대한 국가적 차원의 사회적 노력이 뒷받침되어야 하며, 지속적인 취업 및 고용지속을 위한 장기적인 서비스 등을 위해 지역사회복지관이나 민간기관과의 연계망을 확보하고, PTSD 및 그 외상경험의 재현에 대한 사례관리를 해야 할 필요성이 큰 것으로 나타났다.

토양 코아 분석을 통한 화산 골프장의 조성된 그린에 대한 평가 (The Evaluation on the exiting greens of Hwasan Country Club by undisturbed Soil Core Analysis)

  • 이상재;허근영;심경구
    • 한국조경학회지
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    • 제26권2호
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    • pp.54-61
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    • 1998
  • The subsurface environment of the root zone area can set the stae for "do or die" of the turfgrass plant. The good condition of the greens is verified by their physical properties. Therefore, this study was carried to evaluate on the existing green of Hwasan C.C. by undisturbed soil Core Anaysis. We completed the ISTRC SYSTEM BenchMarking of the undisturbed core samples taken from Green #1, Green #5, Green #9-"Best" area, and Green #9-"Stressed" area for the Hwasan C.C.. It was also our understanding that the greens were in "good" to "very good" conditioni. THe exception might be Green #9-"Stress" area, which was the stressed area. The stressed area was confined to a ridge across Green #9. The organic content test results comfirmed the development of organic layering in depth 0-2.5cm. For the amount of compaction in the upper root zones and te development of the green's respective organic layers, the infiltration rates were high in Green #1, Green #5, and Green #9 "Stressed" area. The depicted aerificaton hole might be the probable cause of the relatively high infiltraton rate. Green #9-"Best" area had a tested infiltration rate of 18.75cm/hr. Either this area had not been aerified, or the undisturbed sample did not contain a aerification cavity. The water retention capacity of the undisturbed samples was good. When the greens were first constructed, the original root zone mix had been relatively low water retention properties. And the bulk density and the porosity of the undisturbed samples were good. In the result, all the greens were similar except for the infiltration. Thus, we supposed that Green #9-"Stressed" area might be ainly influenced by the amount of irrigation water and the configuration of the green's surface. There had been a reduction in the amount of irrigation water as the water retention capacity in the greens was promoted. Especially, it had gradually become more of a problem as the green had matured in Green #9-"Stressed" area. Because Green #9-"Stressed" area was a ridge area. The reduction in the amount of irrigation water might be the probable cause of the stress in Green #9-"Stressed" area. Our final observation related to the soil texture and the particle size distribution of the sand. Though and sand contant of all the tested greens were good, the gravel content of them exceeded ISTRC Guidelines. In particle size distribution of the sand, the very coarse and the coarse content of all the tested greens exceeded, but the rest was insufficient. The stability is a function of the material retained on the 0.25mm mesh screen. But, the content of all the tested greens was very insufficient. Though all the greens was serviceable, the coarse root zone sands, such as the sand in the tested greens, tended to be "unstable". Thus, we recommend using a topdressing/aerification sand which should be more in line with ISTRC/USGA Guidelines.;unstable". Thus, we recommend using a topdressing/aerification sand which should be more in line with ISTRC/USGA Guidelines.ines.

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양액농도와 Cu 스트레스가 양액재배 머스크멜론의 수분포텐셜, 침투포텐셜 및 팽압에 미치는 영향 (Effects of Concentrations of Nutrient Solution and Cu Stress on the Water Potential, Solute Potential and Turgor Pressure in Hydroponically Grown Muskmelon)

  • 장홍기;정순주
    • 생물환경조절학회지
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    • 제5권1호
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    • pp.65-70
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    • 1996
  • 1. 배양액의 EC(mS/cm)와 배양액의 수분포텐셜은 직선적인 관계가 있고, EC의 증가는 배양액의 수분포텐셜 저하로 나타났으며 이에 따라 상위엽의 수분포텐셜이나 침투포텐셜이 변화하는 경향을 보였다. 2. 물리화학, 열역학적인 지표가 되는 수분포텐셜($\phi$w)은 배양액 뿐만 아니라 식물의 근, 경, 엽 및 과실에서의 수분 상태를 동일 단위로 나타내는 것으로 식물의 생장을 제어할 때 유일한 지표인 것으로 나타났다. 3. 배양액의 수분포텐셜 저하에 따라 상위엽의 수분포텐셜이나 침투포텐셜이 저하하는 경향을 보였다. 4. 배지내 Cu 농도가 5$\mu\textrm{m}$이상으로 되면 생육, 지상부의 생체중, 지하부의 건물중, 엽록소 함유율이 동시에 급격히 저하하는 경향을 보였다. 5. 배지내 Cu 농도의 증가에 따라서 생장율의 저하가 나타났으며 생장율의 저하에 따라 상위엽의 수분포텐셜이 저하하는 경향을 보였다. 팽압은 처리에 관계없이 거의 일정하게 나타나 팽압과 배지내 배양액의 Cu 농도 스트레스간에는 직접적으로 관계가 없는 것으로 나타났다. 수분포텐셜($\psi$w)은 식물신장, 세포신장을 수적으로 표현하는 것이 가능하다. 수원이 되는 용액이나 배지, 식물체를 동일 단위(㎫)로 관찰하는 것이 가능해 식물체의 수분생리적 비교 검사를 위한 유효한 방법으로 생각되었다.

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