• 한국환경과학회지
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• 제7권2호
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• pp.141-148
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• 1998

Effects of alumlnlum(AA), soil pH and calcium(Cal on growth response and heavy metal accumulation and regulation of nitrogen fixation In Melilotus suaveolens seedlings, a biennial legume plant dominating in the disturbed area, were quantitatively analyzed during the growing periods. Accumulation of metals In each organ of M. suaveojens was Increased UC the lowering of pH. Al contents In leaf and root treat- ed with 30ppm Al at pH 4.2 on the 28th day after treatment were 8 and 11 folds higher than those of control, while the contents with 100ppm AA were 21 and 24 folds as compared to control. The significent inhibition in Al contents was induced by 100ppm AA and Ca at pH 6.5. Increased metals inhibited higher at pH 4.2 and the growth inhibition due to Al was reversed by the addition of Ca, suggesting that growth correlates to the pH value. Chlorophyll contents in leaves increased during growth stave were inhibited by Al treatments. The biomass was decreased UD the lowering of pH and the increase of concentrations. 100ppm Ca treatment resulted in 5.1-5.9% increase of the biomass as compared to that of 100ppm Al. Specific nitrogen fuation activities In nodules In the 100ppm Al at pH 4.2 and pH 6.5 were reduced to 35. 2% and 52.2% of control, on the 28th day after treatment, while the combination of Al and Ca induced reduced by 10% as compared to control with the treatment of 100ppm AA at pH 4.2 due to the inhibition bination of 100ppm Al and Ca and lowering of pH.

• 유통과학연구
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• 제12권8호
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• pp.43-54
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• 2014

Purpose - This study was based on a theoretical consideration of the structural relationship between the support and control of the franchisor and the satisfaction and strategic response (voice, loyalty, exit, neglect) of the franchisee. First, based on the preceding research, this study systematically organized the type of support and control of the franchisor. Second, the study examined the effects of a franchisor's support and control on the expectancy disconfirmation between affiliated franchisees' expectations before a franchise agreement and performance after operating an affiliated store. Third, the study looked into the effects of expectancy disconfirmation relating to a franchisor's support and control on an affiliated franchisees' general satisfaction. Fourth, this study examined the influence of the general satisfaction of a franchisee on affiliated franchisees' response strategies. Research design, data, and methodology - In this study, the population comprised the nation's franchisors, and the sample comprised franchisees conducting business in Seoul and Gyeonggi-do. A self-administered questionnaire was used; the author and examiner explained the study's parameters to the interviewees in advance, to lessen the rate of rejection of the answers and to maintain reliability. The author distributed 350 copies of the questionnaire and collected 327 copies (93.4%). The author removed 54 copies of the sample, as these copies belonged to franchisees that were not registered by the Fair Trade Commission and/or were thought to have either defects or inadequate answers. The author selected an effective sample of 273 copies to enter data and to do the statistical analysis. Results - Both a reliability analysis and a confirmatory factor analysis were performed to measure reliability and validity, and a structural equation model was used to conduct the hypothesis test and investigate the models. The hypothesis was tested (Table 5). The models had a suitable fit, for instance, χ² = 447.663(df = 212, p = .000), χ²/df = 2.112, GFI = .881, AGFI = .858, RMR = .083, RMSEA = .067, NFI = .932, and CFI = .961. The hypothesis test results were as follows. Hypothesis 1 was accepted (C.R. = -2.339, p = .019). Hypothesis 2 was accepted (C.R. = 15.213, p = .000). Hypothesis 3 was accepted (C.R. = -2.631, p = .006). Hypothesis 4 was accepted (C.R. = 16.271, p = .000). Hypothesis 5 was accepted (C.R. = 2.391, p = .017). Hypothesis 6 was accepted (C.R. = 5.777, p = .000). Hypothesis 7 was accepted (C.R. = 17.153, p = .000). Hypothesis 8 was accepted (C.R. = 24.746, p = .000). Hypothesis 9 was accepted (C.R. = -10.150, p = .000). Hypothesis 10 was accepted (C.R. = -12.124, p = .000). Conclusions - The research results showed that expectations for a franchisor's support and control had a significant influence on expectation disconfirmation in a negative way, whereas the performance of support and control were found to have a significant influence on expectation disconfirmation in a positive way. In addition, the expectation disconfirmation of support and control was found to have a significant influence on satisfaction of franchisees in a positive way. Generally, regarding the research on control, control is found to have a negative influence on the satisfaction of franchisees, but this study proves that control is found to affect it in a positive way through conformity.

• International Journal of Railway
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• 제1권2호
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• pp.64-71
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• 2008

The quality of track-bed fills of railways has been controlled by field measurements of density $({\gamma}_d)$ and the results of plate-load tests. The control measures are compatible with the design procedures whose design parameter is $k_{30}$ for both ordinary-speed railways and high-speed railways. However, one of fatal flaws of the design procedures that there are no simple laboratory measurement procedures for the design parameters ($k_{30}$ or, $E_{v2}$ and $E_{v2}/E_{v1}$) in design stage. A new quality control procedure, in parallel with the advent of the new design procedure, is being proposed. This procedure is based upon P-wave velocity involving consistently the evaluation of design parameters in design stage and the field measurements during construction. The Key concept of the procedure is that the target value for field compaction control is the P-wave velocity determined at OMC using modified compaction test, and direct-arrival method is used for the field measurements during construction. The procedure was verified at a test site and the p-wave velocity turned out to be an excellent control measure. The specifications for the control also include field compaction water content of OMC${\pm}$2% as well as the p-wave velocity.

• Applied Biological Chemistry
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• 제42권4호
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• pp.361-365
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• 1999

감나무 잎으로부터 분리한 폴리페놀 화합물을 가지고 카드뮴으로 중독 된 동물장기의 glutamic oxaloacetic transaminase(GOT), glutamic pyruvic transaminase(GPT), superoxide dismutase(SOD), glutathione S-transferase(GST) 활성 및 과산화지질에 미치는 영향을 조사하였다. GOT는 대조군에 대하여 P-1군(10,000 ppm)과 P-2군(25,000 ppm) 모두 유의적인 차이는 나타나지 않았으나 조금 낮았고, GPT 활성은 P-1군은 5% 수준에서, P-2군은 1% 수준에서 유의적으로 감소하였다. 간 조직의 SOD 활성을 측정한 결과, 대조군에 대하여 P-1군은 5% 수준에서 그리고 P-2군은 1% 수준에서 유의적으로 증가하였고, GST 활성은 대조군에 대하여 P-1군은 유의적인 차이가 나타나지 않았으나 조금 높았고, P-2군은 5% 수준에서 유의적으로 증가하였다. 과산화지질은 대조군에 대하여 P-1군과 P-2군 모두 1% 수준에서 유의적으로 증가하였다.

• Journal of Animal Science and Technology
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• 제46권1호
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• pp.39-48
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• 2004

본 연구의 목적은 생균제의 지속적인 첨가에 의한 돼지에게 있어 성장능력, 영양소 소화율, 혈중 요소태 질소량 및 면역반응에 미치는 영향을 평가하기 위해 실시하였다. 처리는 대조구, 대조구 사료에 0.1%의 생균제 첨가구(P-O.I), 대조구 사료에 0.2%의 생균제 첨가구 (P-0.2)로 하였다. 사양실험에서는 21 일령에 이유한 총 60마리 의 돼지(펑균 체중 6.17 $\pm$ 0.45 kg)를 공사하여 성별 빛 체중에 따라 난괴법에 의해서 배치하였다. 옥수수 대두박 위주의 실험사료에 전 기간에 걸쳐 항생제는 첨가하지 않고 생균제만을 처리별로 첨가하였다. 0${\sim}$8주간의 사양설험에서는 처리간 일당증체량, 일당사료섭취량 및 사료효율에서 유의한 차이가 나타나지 않았다 하지만 9${\sim}$20주에서는 P-O.I과 P-0.2 처리구가 대조구에 비해 유의하게 일당증체량이 증가하였으며 (P<0.05) 첨가수준이 증가할수록 그 경향은 더욱 뚜렷하였다. 전체 사양 실험 기간동안 일당증체량, 일당사료섭취량 및 사료효율은 생균제 첨가구가 대조구에 비해 증가하는 경향을 보였으나 통계적으로 유의한 차이는 없었다. 생균제에 의한 영양소 소화율 및 질소 축적율을 조사하기 위해 자돈기와 육성기에 두번에 결쳐 대사실험을 실시하였다. 자돈기(평균 체중 17.93 $\pm$ 1.45kg )에서는 건물, 조단백질, 조지방의 소화율이 P-O.I 과 P-0.2 생균제 처리구에서 대조구에 비해 증가하였으며 (P<0.05), 조회분의 소화율은 P-0.2 처리구가 대조구에 비해서 유의하게 증가하였다. (P<0.05). 칼슐의 소화용은 P-0.2 처리구가 P-O.I 및 대조구에 비해 유의 하게 높았지만(P<0.05), 인의 소화율에서는 처리간 차이가 나타나지 않았다. 질소 축적율에서는 P-O.2와 P-O.1 생균제 처리구가 분내 질소 함량을 유의하게 낮추었으나( P<0.05), 뇨내 질소 함량 및 질소 축적율에는 영향을 미치지 않았다. 육성기(평균체중 41.80 $\pm$2.68kg)에서는 처리간 영양소 소화율 및 질소 축적율이 통계적으로 유의한 차이를 보이지 않았다. 그리고 혈중 요소태 질소농도 및 혈액내 액혈구, IgG, IgA의 함량도 전 기간에 걸쳐 처리간의 차이가 나타나지 않았다. 본 실험을 통하여 사료내 지속적인 생균제의 첨가는 돼지의 성장과 영양소 소화율을 향상 시킬 수 있을 것으로 사료된다.

• 생물환경조절학회지
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• 제4권2호
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• pp.203-210
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• 1995

국내 원예시설의 증가와 더불어 양액재배농가도 증가추세에 있어 저렴한 국산 양액재배 자동화기기가 농가에 필요한 실정이다. 이에 따른 양액재배의 EC와 pH를 자동조절하기 위하여 마이크로컴퓨터의 일종인 PLC(programmable logic controller)를 이용한 장치를 개발하고 재배실험을 실시한 결과를 요약하면 다음과 같다. 1. Ladder diagram언어를 사용하여 양액재배의 자동화 프로그램을 작성하였다. 2. PLC를 이용하여 양액의 EC, pH수준을 1.70-l.72mS/cm, 6.1-6.5로 전 생육기간 동안 유지시킬 수 있었다. 3. 대조구에 비하여 처리구가 상품과(당도 5.0 oBrix, 산도 0.4% 이상) 및 수량성이 높은 결과를 얻었다. 4. 식물체의 무기성분 함량은 처리구가 대조구에 비해 전체적으로 높았다.

• 한국산림과학회지
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• 제89권3호
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• pp.422-430
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• 2000

화강암 모재의 갈색산림토양에 3년생 잣나무(Pinus koraiensis) 묘목을 이식하여 1999년 4월 21일부터 11월 17일까지 210일간 pH 5.6(대조구), 4.0, 3.0, 2.5 및 2.0의 인공산성우를 조제하여 살포한 결과, 잣나무 묘목의 가시장해는 pH 2.5 및 pH 2.0 처리구에서 관찰되었다. 잎과 뿌리 그리고 개체 건중량은 대조구에 비해 pH 2.0 처리구에서 유의적으로 감소하였으며, T/R비는 타 처리구에 비해 pH 2.0 처리구에서 현저히 증가하였다. 잣나무 묘목의 각 기관내 원소성분을 분석한 결과, 잎의 Ca, P농도 및 chlorophyll함량은 대조구에 비해 pH 2.0 처리구에서 증가하는 경향을 보였으며, N농도는 모든 기관에 있어서 처리구 pH가 감소함에 따라 증가하였다. 잣나무 묘목을 육성한 토양을 분석한 결과, 처리구의 pH가 감소함에 따라 토양 pH가 저하되고 Ca, Mg, Al 및 Mn 농도가 증가하였는데, 특히 토양 pH 4.4 전후에서 급격한 증가를 보였다. 한편, 잣나무 묘목의 개체건중량과 토양의 pH 및 Al농도와의 사이에 각각 높은 상관(r=0.90, p<0.05 ; r=-0.94, p<0.01)이 인정되었다. 이 결과는 토양의 pH 및 Al농도는 산림수종의 생장에 미치는 산성우의 영향평가에 있어 중요한 지표가 될 것으로 사료된다.

• 대한간호학회지
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• 제27권4호
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• pp.765-776
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• 1997

Hospitals accomodate patients who have a high risk of infection due to reduced immunity as well as people who require surgical, medical or other treatments. Consequently, the role of clinical nurses, who come into close contact with these patients is very important in the control of nosocomial infection. This study was done to investigate and compare the level of perception of the importance of the control of nosocomial infections as well as the level of actual performance, and the level of satisfaction with the control of nosocomial infection by the clinical nurses. Thus, the purpose of this study is to contribute basic data for improving policies and educational programs to control nosocomial infection. A summary of the survey results is as follows. 1) The means of scores on all categories of the inquiry were 4. 51 for awareness 4.42 for actual performance, and 3.20 for satisfaction, of a possible high score of 5.00. 2) Correlations of the level of perception of importance between characteristics of nurses and hospital control of nosocomial infection differed significantly according to the type of hospital establishment type (p=.005), age(p=.000), career(p=.000), position (p=.002), and regular conferences on infection control in working departments(p=.003), Correlation of the level of actual performance between characteristics of nurses and hospital control of nosocomial infection diffesed significantly according to type of hospital(p=.000), hospital size (p=.009), working department(p=.000), age(p=.000), career (p=.000), school career(p=.040), position (p=.000), education experience on nosocomial infection(p=.020), and regular conferences on infection control in working department(p=.000). Correlation of degree of satisfaction between characteristics of nurses and hospital control of nosocomial infection also differed significantly according to the type of hospital establishment (p=.003), working department(p=.000), age (p=.000), and regular conferences on infection control in working department (p=.000). 3) Correlation between clinical nurses, level of perception of importance and actual level of performance for the control of nosocomial infection was relatively positive (r=.57, p=.000). Correlation between clinical nurses degree of satisfaction and level of actual performance for control of nosocomial infection was relatively positive (r=.47, p=.000). Correlation between clinical nurses, level of perception of importance and degree of satisfaction degree with the control of nosocomial infection was also relatively positive (r=.27, p=.000).

• Asian-Australasian Journal of Animal Sciences
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• 제9권4호
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• pp.421-426
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• 1996

Comparison of body weight changes of does infected with Haemonchus contortus (treatment groups 2 &3) and uninfected does (control group) was made using weekly body weight measurements over 35 weeks. The animals in treatment group 2 weighted significantly (p < 0.05) less than animals in the control group from the 5th week to the end of the experiment. Does in treatment group 3 had significantly (p < 0.05) lighter body weight than control does from the 13th week to the end of the study. The animals in control group gained an average of 0.75 kg. On the other hand, animals in infected groups 2 and 3 lost an average of 3.90 kg and 4.13 kg body weight, respectively. The animals in groups 2 and 3 also had significantly (p < 0.05) lower preslaughter and hot carcass weights than the controls.

• 한국치위생학회지
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• 제9권2호
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• pp.73-88
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• 2009

The purpose of the study was to provide the basic for the prevention of infection control by analyzing the level of recognition and practice of dental hygiene students. It is important for dental clinic staffs to know and practice infection control measures in favor of effective infection control. Thus, this study conducted an one-month questionnaire survey (during October 2008) for dental hygiene students who ever experienced in 16-week clinical practice, and analyzed total 206 questionnaire forms as collected from them, so that it could determine potential associations between their recognition and practice of infection control and thereby suggest an efficient solution for infection control in dental hygiene. 1. It was found that our students' recognition about infection control averaged $4.49{\pm}.58$ points on the whole, and they were best aware of instrumental disinfection and sterilization among other measures, which was followed by hand washing, extirpation control, post-sterilization management, personal protective outfit and instrumental surface maintenance respectively. 2. It was found that our students' practice of infection control averaged $3.85{\pm}.57$ points on the whole, and they practiced hand washing most actively among other measures, which was followed by extirpation control, post-sterilization management, instrumental disinfection and sterilization, personal protective outfit and instrumental surface maintenance respectively. 3. It was found that our students scored higher mean points in recognition about every measure of infection control than those in practice (t=15.676, p=0.000). Particularly, it was notable that there were significant differences between their mean points in recognition and practice of some infection control measures, such as instrumental surface maintenance (t=15.361, p=0.000), personal protective outfit (t=15.245, p=0.000) and instrumental disinfection and sterilization (t=11.169, p=0.000). But there was least significant difference between mean points in recognition and practice of hand washing (t=5.460, p=0.000). 4. For potential associations between recognition and practice of infection control, it was found that higher recognition was in significantly positive associations with higher practice in every measure of infection control (r=.478, p=.000), such as extirpation control (r=.630, p=.000), instrumental disinfection and sterilization (r=.477, p=.000) and post-sterilization management (r=.433, p=.000). 5. It was found that there were differences in our students' recognition depending upon availability of infection control guideline (t=4.587, p=.011), and there were significant differences in practice depending on necessity of infection control education on a statistical basis (t=2.229, p=.027). Overall, it is found that our dental hygiene students are very likely to practice hand washing and extirpation control, because both of these measures are relatively easy to practice or are considered legally binding.