• Korean Journal of Acupuncture
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• v.35 no.1
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• pp.41-45
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• 2018

Objectives : To investigate minimum pressure by verifying changes in pressure due to bleeding amount during bloodletting-cupping therapy. Methods : (1) We compared adhesion performance of four different cupping cups of same size: two disposable cupping cups(A, B) and two reusable cupping cups(A, B) each were vacuumed three times and kept in place for 10 minutes. (2) We vacuumed two different sized disposable cupping cups(A), size.1(InnerDiameter 48.8 mm) and size.3(InnerDiameter 39.1 mm), twice each(-200 mmHg) on silicon plate. We injected water and air at regular intervals in cupping cups by using a syringe, and then measured change of pressure in cupping cups and pressure at the time of dropout. Results : (1) Pressure reduction was $4.75{\pm}2.78%$ on average in the order of 'Disposable[A]>reusable[B]>Disposable[B]>reusable[A]', so that pressure retention performance of disposable cups can't be regarded as inferior to that of reusable cups. (2) Pressure of disposable cupping B(size.1) decreased by an average of -40.08 mmHg per 5 ml of water. At -24.8 mmHg, when 22 ml of water has been injected, cup has come off. Pressure of disposable cupping B(size. 3) decreased by an average of -99.4 mmHg per 5 ml of water. At -48.6 mmHg, when 13 ml of water was injected, cupping came off. Conclusions : Considering reduction rate of pressure due to water injection, in case of bleeding more than 15 ml, size.3 cup always comes off, therefore it needs to be re-operated at least once. Meanwhile, size.1 cup does not always come off in the same condition, depending on the initial pressure and therefore, re-operation may be considered.

• Journal of Wetlands Research
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• v.16 no.3
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• pp.363-370
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• 2014

Sewage distribution rate in rural area is only 50% level than urban area. Normally, rural area sewage is focused on the reason of water source pollution owing to rural areas were located in near water source. The Korea government is effort to manage the rural community sewage for protect the water source. In this study conducted analysis on rural community sewage treatment plant(RCSTP) nutrient treatment efficiency using operation results on winter season. Research areas are newly constructed in Bong-hwa, Yeong-yang and An-dong areas which are located in near An-dong Im-ha Dam. Based on operation result, sludge retention time(SRT) and mixed liquer suspended solid(MLSS) were effected on RCSTP nutrient treatment efficiency. Thus, it is necessary to manage of operation condition for nutrient treatment efficiency in RCSTP during the winter season.

• Journal of Microbiology and Biotechnology
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• v.23 no.3
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• pp.382-389
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• 2013

Propionate is an important intermediate product during the methane fermentation of organic matter, and its degradation is crucial for maintaining the performance of an anaerobic digester. In order to understand the effect of temperature on propionate degradation, an upflow anaerobic sludge blanket (UASB) reactor with synthetic wastewater containing propionate as a sole carbon source was introduced. Under the hydraulic retention time (HRT) of 10 h and influent propionate of 2,000 mg/l condition, propionate removal was above 94% at 30-$35^{\circ}C$, whereas propionate conversion was inhibited when temperature was suddenly decreased stepwise from $30^{\circ}C$ to $25^{\circ}C$, to $20^{\circ}C$, and then to $18^{\circ}C$. After a long-term operation, the propionate removal at $25^{\circ}C$ resumed to the value at 30- $35^{\circ}C$, whereas that at $20^{\circ}C$ and $18^{\circ}C$ was still lower than the value at $35^{\circ}C$ by 8.1% and 20.7%, respectively. Microbial community composition analysis showed that Syntrophobacter and Pelotomaculum were the major propionate-oxidizing bacteria (POB), and most POB had not changed with temperature decrease in the UASB. However, two POB were enriched at $18^{\circ}C$, indicating they were low temperature tolerant. Methanosaeta and Methanospirillum were the dominant methanogens in this UASB and remained constant during temperature decrease. Although the POB and methanogenic composition hardly changed with temperature decrease, the specific $COD_{Pro}$ removal rate of anaerobic sludge (SCRR) was reduced by 21.4%-46.4% compared with the control ($35^{\circ}C$) in this system.

• Journal of Microbiology and Biotechnology
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• v.30 no.11
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• pp.1688-1696
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• 2020

Soil physical and chemical characteristics, soil potential denitrification rates (PDR), community composition and nirK-, nirS- and nosZ-encoding denitrifiers were studied by using MiSeq sequencing, quantitative polymerase chain reaction (qPCR), and terminal restriction fragment polymorphism (T-RFLP) technologies base on short-term (5-year) tillage field experiment. The experiment included four tillage treatments: conventional tillage with crop residue incorporation (CT), rotary tillage with crop residue incorporation (RT), no-tillage with crop residue retention (NT), and rotary tillage with crop residue removed as control (RTO). The results indicated that soil organic carbon, total nitrogen and NH₄⁺-N contents were increased with CT, RT and NT treatments. Compared with RTO treatment, the copies number of nirK, nirS and nosZ in paddy soil with CT, RT and NT treatments were significantly increased. The principal coordinate analysis indicated that tillage management and crop residue returning management were the most and the second important factors for the change of denitrifying bacteria community, respectively. Meanwhile, this study indicated that activity and community composition of denitrifiers with CT, RT and NT treatments were increased, compared with RTO treatment. This result showed that nirK, nirS and nosZ-type denitrifiers communities in crop residue applied soil had higher species diversity compared with crop residue removed soil, and denitrifying bacteria community composition were dominated by Gammaproteobacteria, Deltaproteobacteria, and Betaproteobacteria. Therefore, it is a beneficial practice to increase soil PDR level, abundance and community composition of nitrogen-functional soil microorganism by combined application of tillage with crop residue management.

• Fisheries and Aquatic Sciences
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• v.17 no.1
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• pp.75-84
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• 2014

To determine a suitable dietary protein/lipid (CP/CL) ratio in the early juvenile stages of hybrid porgy ($F_1$), female red sea bream (RSB) ${\times}$ male black sea bream, five diets with various CP/CL ratios-60/7, 55/12, 51/17, 46/23, and 41/28-were prepared and provided to juveniles in triplicate. At the smaller juvenile stage, $F_1$, weighing 0.32 g, a significantly higher specific growth rate (SGR) and feed efficiency (FE) were seen with 60/7 and 55/12 diets. However, in RSB weighing 0.26 g, SGR and FE were higher with the 60/7 diet than the other diets at $21^{\circ}C$. At the larger juvenile stage, $F_1$, weighing 3.7 g, there was no significant difference in SGR or FE among the diets, but RSB weighing 4.0 g fed 60/7, 55/12, and 51/17 diets had higher SGR and FE than 46/23 and 41/28 diets at $24^{\circ}C$. Moreover, survival and apparent nutrient retention of $F_1$ at both stages were significantly higher than those in RSB. These results indicate that both $F_1$ and RSB weighing ca. 0.3 g require a higher dietary CP/CL than those weighing ca. 4 g. Additionally, $F_1$ in both trials showed the suitability of a lower dietary CP/CL than RSB, indicating that mass production of $F_1$ juveniles will be more economical than RSB.

• Journal of Convergence for Information Technology
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• v.10 no.7
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• pp.84-97
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• 2020

This pilot study evaluated the reach and efficacy of nurse training program to provide palliative care to patients with advanced chronic diseases. A mixed method was used (an one-group pre-post research design and a group interview). To examine the changes in knowledge, attitude and self-efficacy, paired t-test were used with SPSS 21.0. To obtain pivoting information in real settings, a content analysis was conducted in the data obtaining from a group interview. There were significant improvements on knowledge and self-efficacy scores after the program. Additionally, high retention rate and program satisfaction were found in the participants while recruitment strategies, especially nurses working for tertiary hospitals, need to be modified in future research. A full-fledged research is warranted to find effective strategies to implement and disseminate the program for nurses working in diverse settings.

• Journal of Korean Public Health Nursing
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• v.20 no.1
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• pp.57-68
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• 2006

Purpose: To identify perimenstrual discomforts, coping and relief of symptoms in female workers. Methods: A convenience sample of 203 women who had worked were obtained from two hospitals in Busan. Data were collected through questionnaires from November 8 to 16, 2004. Three instruments were used in this study: the Perimenstrual Discomfort Questionnaire by Park(1988) and the Menstrual Coping Questionnaire and the Relief of Symptoms by Billings & Moos(1981) modified for this study. The data were analyzed by descriptive statistics, t-test, and ANOVA with SPSS 10.0 program. Results: The prevalence rate of dysmenorrhea was 81.3%. The total mean score for perimenstrual discomforts was 2.83 out of a possible total of 5 and the mean score for each category was, 3.08 for water retention, 2.95 for pain, 2.88 for negative affect, 2.83 for behavioral change, 2.73 for autonomic reactions, and 2.51 for concentration. According to these study results, statistical differences were found for age(F=2.76, p=0.04), feeling to menstruation(F=3.94, p=0.00), dysmenorrhea(t=4.26, p=0.00), and taking medication(t=2.09, p=0.00). The coping modes with the highest scores were 'take a hot bath'(99.0%)', 'rest and go to bed'(83.7%), 'regard menstruation as a physiological and temporary phenomenon'(76.8%), 'take a warm shower'(65.0%). The most frequently used methods to relieve symptoms were 'rest and go to bed'(70.0%), 'take a warm shower'(57.6%), 'take pain killers'(49.8%), 'apply hot water bag on painful parts of the body'(46.8%). Conclusion: Further research is needed to understand perimenstrual discomforts and the variables associated with them. Nursing intervention has to be considered in any program aiming to reduce perimenstrual discomforts.

• Journal of Korean Public Health Nursing
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• v.19 no.1
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• pp.53-63
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• 2005

The purpose of this study was to identify menstrual discomforts and coping m adult women. The subjects were 577 adult women. aged 20 years old and over. selected by convenient sampling. Data were collected through a questionnaire survey from December 2. 2004 to December 31. 2004. Two instruments were modified and used in this study. the Menstrual Discomfort Questionnaire by Park(1988) and the Menstrual Coping Questionnaire by Billings & Moos(198l). The data were analyzed by descriptive statistics. t-test. and ANOVA with SPSS 10.0 program. The results of this study were as follows. 1. The prevalence rate of dysmenorrhea was $85.6\%$. 2. The total mean score for menstrual discomforts was 2.82 of a possible total of 5. The mean score for each category was 3.10 for water retention. 2.93 for negative affect. 2.89 for pain. 2.74 for autonomic reactions. 2.73 for behavioral change. and 2.59 for concentration. 3. Statistical differences were found for menarche age(F=9.351. p<.00l), feeling to menstruation(F=12.376. p<.001). dysmenorrhea(t=7.3l7. p<.001). onset of dysmenorrhea (F= 12.766. p<.001). taking medication(t=6.289. p<.001). and degree of taking medication (F=12.924. p<.00l). 4. The coping modes with the highest scores were 'rest and go to the bed '$(83.3\%)$. 'regard menstruation as a physiological and temporary phenomenon' $(68.6\%)$, and 'take a warm shower' $(64.5\%)$. We conclude that there were many women with dysmenorrhea. that the first day was the onset of menstrual discomfort. and that it differed by menarche age. feeling to menstruation. dysmenorrhea. onset of dysmenorrhea. taking medication. and degree of taking medication. Nursing intervention has to be considered in programs to reduce menstrual discomfort.

• Journal of Environmental Science International
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• v.8 no.1
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• pp.107-113
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• 1999

A new biological nutrient removal system combining $A^2/O$ process with fixed film was developed in this work and the characteristics of denitrification were especially investigated in the combined fixed film reactor(CFFR). Media was added in the anaerobic, anoxic and aerobic reactors, respectively. Tests were made to establish the effluent level of $NO_x-N$, COD, DO and nitrite effects on $NO_x-N$ removal in the CFFR by decreasing hydraulic retention time (HRT) from 10.0 to 3.5 hours and by increasing internal recycle ratio form 0% to 200%. The influent was synthesized to levels similar to the average influent of municipal wastewater treatment plants in Korea. SARAN media with a porosity of 96.3% was packed 40% / 130% / 25% based on its reactor volume, respectively. It was found that COD rarely limited dentrification in the anoxic reactor because of high $C/NO_x/-N$ ratio in the anoxic reactor, while DO concentration in the anoxic reactor and $NO_2-N/NO_x/-N$ from the aerobic effluent inhibited denitrification in the anoxic reactor. It was proved that the critical points of DO concentration in the anoxic reactor and $NO_2-N/NO_x/-N$ from the aerobic effluent were 0.15mg/L and 10%, respectively. As the internal recycle ratio increased, DO concentration in the anoxic reactor and $NO_2-N/NO_x/-N$ from the aerobic effluent increased. Especially, at the condition of internal recycle ratio, 200%, DO concentration in the anoxic reactor and $NO_2-N/NO_x/-N$ from the aerobic effluent exceeded the critical points of 0.15mg/L and 10%, respectively. Then, denitrification efficiency considerably decreased. Consequently, it was represented that the control of DO concentration in the anoxic reactor and $NO_2-N/NO_x/-N$ from the aerobic effluent can assure effective denitrification.

• Journal of Periodontal and Implant Science
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• v.45 no.1
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• pp.23-29
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• 2015

Purpose: This study was conducted to compare the cumulative survival rates (CSRs) and the incidence of postloading complications (PLCs) between a bone-level internal connection system (ICS-BL) and an external connection system (ECS). Methods: The medical records of patients treated with either a ICS-BL or ECS between 2007 and 2010 at Asan Medical Center were reviewed. PLCs were divided into two categories: biological and technical. Biological complications included >4 mm of probing pocket depth, thread exposure in radiographs, and soft tissue complications, whereas technical complications included chipping of the veneering material, fracture of the implant, fracture of the crown, loosening or fracture of the abutment or screw, loss of retention, and loss of access hole filling material. CSRs were determined by a life-table analysis and compared using the log-rank chi-square test. The incidence of PLC was compared with the Pearson chi-squared test. Results: A total of 2,651 implants in 1,074 patients (1,167 ICS-BLs in 551 patients and 1,484 ECSs in 523 patients) were analyzed. The average observation periods were 3.4 years for the ICS-BLs and 3.1 years for the ECSs. The six-year CSR of all implants was 96.1% (94.9% for the ICS-BLs and 97.1% for the ECSs, P=0.619). Soft tissue complications were more frequent with the ECSs (P=0.005) and loosening or fracture of the abutment or screw occurred more frequently with the ICS-BLs (P<0.001). Conclusions: Within the limitations of this study, the ICS-BL was more prone to technical complications while the ECS was more vulnerable to biological complications.