• Journal of Home Health Care Nursing
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• v.30 no.1
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• pp.26-36
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• 2023

Purpose: This study investigated the organizational culture in hospital for infection control, moral sensitivity, and the degree of infection control among long-term care hospital nurses, and to identified the factors associated with infection control perfomance. Methods: 186 nurses who directly care for patients at seven Long-Term Care Hospitals in D Metropolitan City participated in the survey. Data were collected using self-reported questionnaires and analyzed using the IBM SPSS 26.0 software. Results: Moral sensitivity showed statistically significant differences in age (F=5.473, p=.065), clinical experience (F=8.890, p=.031), nursing hospital work experience (F=6.520, p=.038), religion (t=-2.01, p=.046) and position (t=-2.96, p=.003). Correlation analysis revealed that with moral sensitivity and effect of organizational culture on infection control, there was a positive correlation between infection control and patient-centered nursing (r=.201, p<.006), professionalism (r=.149, p<.042), benevolence (r=.303, p<.001), infection control organizational culture (r=.556, p<.001). Benevolence of moral sensitivity (β=.21, p=.001) and infection control organizational culture (β=.54, p<.001) were associated with infection control perfomance. Moral sensitivity (including patient-centered nursing, professionalism, and benevolence) and infection control organizational culture explained 33.8% of the variance in infection control (F=24.57, p<.001). Conclusion: It is important to improve the moral sensitivity of nurses and a positive organizational culture for better infection control. We need to develop intervention strategies and establish systematic and administrative support.

• Journal of Korean Biological Nursing Science
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• v.24 no.2
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• pp.104-112
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• 2022

Purpose: The purpose of this study was to investigate the levels and the relationship of emergency nurses' organizational culture and fatigue for infection control, and infection control compliance of COVID-19. Methods: Data was collected from 114 nurses caring for patients suspected of COVID-19 at two emergency medical centers in Gyeonggi-do and Seoul June 18-July 23, 2021. Results: Emergency nurses caring for patients suspected of COVID-19 suffered from high fatigue for infection control. The mean scores of the organizational culture and fatigue for infection control, and infection control compliance of COVID-19 were 51.80 ± 8.37 of 70 points, 78.46± 12.28 of 100 points and 71.02± 7.84 of 80 points, respectively. The higher infection control compliance of COVID-19 is significantly related to the higher organizational culture for infection control (r= .42, p< .001). Conclusion: In the COVID-19 pandemic, the formation of a positive organizational culture for infection control may be a priority as a major strategy to improve the infection control compliance of emergency nurses. It is also necessary to manage the high level of fatigue for infection control among emergency nurses.

• Journal of the Korean Society of Food Science and Nutrition
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• v.28 no.1
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• pp.233-239
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• 1999

This study was performed to evaluate the effects of the supplementation of lactic acid bacterias (LAB; S. thermophilus, L. acidophilus) aluminum accumulation and function kidney in rats treated with 250 g/g aluminum sulfate for 4 weeks. Fifty male Sprague Dawley strains were divided into five groups according to the types of supplement. the control, S. thermophilus culture group(A), autoclaved S. thermophilus culture(B), L. acidophilus culture group(C) and autoclaved L. acidophilus(D). The weight gain was increased by supplementation of S. thermophilus culture(A), autoclaved S. thermophilus culture(B), L. acidophilus culture(C), autoclaved L. acidophilus culture(D), especially by supplementation of S. thermophilus cultured(A) as compared to control group. The amount of water intake was increased in control group as compared to the LAB supplemented group. The content of aluminum were decreased 19.57%, 31.25%, 37.10%, and 32.40% in kidney after supplementation of non autoclaved culture group (A,C), and autoclaved group(B,D) respectively, as compared to control group. Water balance, urine volume, and excretion of sodium and potassium decreased in LAB supplemented group and control group. Excretion of creatinine increased in control group and tendency to increased in LAB supplemented group. In conclusion, the effect of suppression of aluminum accumulation was more effective in sup plementation of S. thermophilus culture(A), and L. acidophilus culture(C) than autoclaved S. thermo philus culture(B), and L. acidophilus culture(D).

• Journal of Korean Academy of Nursing Administration
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• v.22 no.2
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• pp.199-208
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• 2016

Purpose: The purpose of this study was to investigate the influence of patient safety culture and perceived teamwork on the safety control of nurses. Methods: This study was conducted as a descriptive cross-sectional survey with 141 nurses who worked in a tertiary hospital with over 1,000 beds in S city, Gyeonggi province. Data were collected using structured questionnaires from July 20, to July, 31, 2015. Results: The average work period for nurses participating in the research was 8.84 years. The perceived teamwork and patient safety culture were positively correlated with safety control. The regression model with patient safety culture, perceived teamwork and clinical career against safety control was statistically significant (F=10.16, p<.001). This model also explained 37.1% of safety control (Adj. $R^2=.37$). Especially, communication (${\beta}=.27$, p=.023) of patient safety culture, clinical career (${\beta}=.26$, p<.001), mutual support (${\beta}=.24$, p=.042), and team leadership (${\beta}=.24$, p=.018) in perceived teamwork were identified as factors influencing safety control. Conclusion: The findings of this study imply that a broad approach including teamwork and patient safety culture should be considered to improve the safety control for nurses.

• Proceedings of the Korean Society of Agricultural Engineers Conference
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• 1998.10a
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• pp.224-229
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• 1998

This study was conducted to develop the simple and convenient irrigation control model which can maintain the appropriate rates of irrigation and drainage of nutrient solution according to the environmental conditions and growth stages in soilless culture of cucumber. In order to obtain fundamental data for development of the model, investigation of the actual state of soilless culture practices was carried out. Most irrigation systems of soilless culture were controlled by the time clock. Evapotranspiration of cucumber in soilless culture was investigated and correlations with environmental conditions were analyzed, and its prediction model was developed. A irrigation control model based on the time clock control and there were considered seasons, weather conditions, and growth stages was developed. Applicability of the model was tested by simulation. Drainage rates of irrigation system controlled by conventional time clock, integrated solar radiation, and the developed model were 61%, 20%, and 32%, respectively in cucumber perlite culture.

• Magazine of the Korean Society of Agricultural Engineers
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• v.41 no.2
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• pp.37-43
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• 1999

This study was conducted to develop the simple and convenient irrigation control model which can maintain the appropriate rates of irrigation and drainage of nutrient solution according to the enviornmental conditions and growth stages in soilless culture of cucumber. In order to obtain fundamental data for development of the model, investigation of the actual state of soilless culture practices was carried out. Most irrigatioin systems of soillness culture were controlled by the time colock. Evapotranspiration of cucumber in soilness culture was investigated and correlations with environmental conditions were analyzed , and its estimating model was developed. In order to develop the irrigation system which can control the amount of nutrient solution applied according to seasons, weather conditions, and growth stages, a irrigation clock control was developed. Applicability of the model was tested by simulation. Drainage rates of nutrient solution controlled by conventional time clock, integrated solar radiation, and the developed model were 61% , 20%, and 32% , respectively in cucumber perlite culture.

• Biotechnology and Bioprocess Engineering:BBE
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• v.10 no.6
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• pp.564-570
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• 2005

In the present study, the protective effects of Bcl-2 over-expression in a suspension culture (without any adaptation) and spent medium (low nutrient and high toxic metabolite conditions) were investigated. In the suspension culture without prior adaptation, the viability of the control cell line fall to 0% by day 7, whereas the Bcl-2 cell line had a viability of 65%. The difference in the viability and viable cell density between the Bcl-2 and control cell lines was more apparent in the suspension culture than the static culture, and became even more apparent on day 6. Fluorescence microscopic counting revealed that the major mechanism of cell death in the control cell line in both the static and suspension cultures was apoptosis. For the Bcl-2 cell lines, necrosis was the major mode of cell death in the static culture, but apoptosis became equally important in the suspension culture. When the NS0 6A1 cell line was cultured in spent medium taken from a 14 day batch culture, the control cell line almost completely lost its viability by day 5, whereas, the Bcl-2 still had a viability of 73%. The viable cell density and viability of the Bcl-2 cell line cultivated in fresh medium were 2.2 and 2.7 fold higher, respectively, than those of the control cultures. However, the viable cell density and viability of the Bcl-2 cultivated in the spent medium were 8.7 and 7.8 fold higher, respectively, than those of the control cultures. Most of the dead cells in the control cell line were apoptotic; whereas, the major cell death mechanisms in the Bcl-2 cell line were necrotic.

• Journal of applied mathematics & informatics
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• v.19 no.1_2
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• pp.203-214
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• 2005

In this study the optimal control of fed-batch glycerol fermentation is investigated based on an impulsive dynamical system. Considering the sudden increase of the glycerol and alkali in fed-batch culture of biodissimilation of glycerol to 1,3-propanediol, this paper proposes a non-linear impulsive system of fed-batch culture. The existence, uniqueness and regularity properties of piecewise solution for the system are proved. In view of the controllability of volumes of glycerol added to the reactor instantaneously, the paper constructs an optimal control model based on the nonlinear impulsive system and the existence of the optimal control is obtained. The control variables here are the moments and the sizes of jumps in the states at the discrete instants and the objective is to maximize the productivity of 1,3-propanediol over one cycle.

• Journal of the Korean Society of Tobacco Science
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• v.20 no.2
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• pp.172-177
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• 1998

The culture filtrate of Streptomyces sp. B25, which was identified in this experiment, was tested for the control of tobacco mosaic virus (TMV) with the susceptible tobacco cultivar, NC 82, under the field conditions following the preliminary examination of its characters for TMV control. Control efficacy of the culture filtrate against TMV infection continued over 50% up to 6 days after treatment, and its systemic effect was about 30% of the direct effect. In field conditions control efficacy of the culture filtrate against TMV infection was 95.3 % at 2 weeks after TMV inoculation, and decreased to 58.3 % at 3 weeks after inoculation. Five fold-dilution of the culture filtrate showed about half of the control efficacy by the stock culture filtrate. Analysis of the antibiotic material responsible for the inhibition of TMV infection through nuclear magnetic resonance experiments revealed that the antibiotic is antimycin $A_1$, which is firstly reported as an anti-phytoviral antibiotic in this experiment.

• Mycobiology
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• v.41 no.4
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• pp.221-224
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• 2013

Aphids are one of the most destructive pests in crop production such as pepper, cucumber, and eggplants. The importance of entomopathogenic fungi as alternative pest control agents is increasing. Conidia of entomopathogenic fungi are influenced by environmental conditions, such as temperature and relative humidity, and cause slow and fluctuating mortality. These factors have prevented wider application and use of biocontrol agents. For investigation of means of mitigation of such problems, we conducted bioassays with 47 fungal culture filtrates in order to evaluate the potential of secondary metabolites produced by entomopathogenic fungi for use in aphid control. Among 47 culture filtrates cultured potato dextrose broth, filtrate of Beauveria bassiana Bb08 showed the highest mortality (78%) against green peach aphid three days after treatments. Filtrate of Bb08 cultured in Adamek's medium showed higher toxicity as 100% to third instar nymphs of the aphid compared with seven other filtrates cultured in different broths amended with colloidal chitin or oil. The culture filtrates and fungal cultures from media amended with colloidal chitin or oil had lower control efficacies than filtrates without these additives in three different media. These results indicate that the fungal culture fluid or culture filtrate of B. bassiana Bb08 cultured in Adamek's medium has potential for development as a mycopesticide for aphid control.