• Journal of Society of Occupational Therapy for the Aged and Dementia
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• v.12 no.2
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• pp.1-11
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• 2018

Objective : The aim of this study was to compare the sociodemographic characteristics, depression, quality of life, and unmet medical need in elders with and without limitation of activity by aging or dementia. Method : The data were used for raw data of seventh national health and nutrition examination survey (2016). We compared sociodemographic characteristics, depression, quality of life, and unmet medical needs between elders with limitation of activity by aging or dementia (n = 32) and elders without limitation of activity (n = 1201). Result : Elders with limitation of activity were significantly older than elders without limitation of activity (p<.001), income was lower (p<.05) and married status had more bereavement (p<.001). The elders with limitation of activity had higher depression (p<.001) and lower quality of life (p<.001) than elders without limitation of activity. Unmet medical need was greater than elders without limitation of activity (p<.001). Conclusion : Elders with limitation of activity showed that they did not receive enough medical services than elders without limitation of activity. These results suggest that the welfare system for the health care of population with aging or dementia needs to be improved.

• Women's Health Nursing
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• v.8 no.1
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• pp.96-105
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• 2002

The purpose of this study is to identify the relation between functional limitation, functional disability and back pain during pregnancy. Data was collected by interview or self-report from 66 pregnant women between the gestational ages of 17 and 22 weeks who had experienced back pain from February 17 through July 28, 2001. The results of this study are as follows; 1. The prevalent mean week of back pain starting during pregnancy was 12.8. The mean pain intensity scores on the VAS during the past week and now were 5.6 and 3.7. The mean score on the functional limitations was 38.9. The mean score on the functional disability was 19.7. 2. The pain intensity on the past week was correlated with the pain intensity now (r=.339, p<0.01) and the functional limitations (r=.251, p<0.05). The pain intensity now was correlated with the functional limitations (r=.295, p<0.05) and the functional disability (r=.429, p<0.01). The functional limitations was correlated with the functional disability (r=.229, p<0.01). The higher pain intensity was the more functional limitation and functional disability occurred. 3. There was a statistically significant correlation between the pain intensity now and the type of housing (t=-2.051, p=.045), and back pain history before pregnancy (t=-2.429 p=.003). 4. There was a statistically significant correlation between the functional limitation and income (F=2.803, p=.047) and back pain history before pregnancy (t=-3.225, p=.002). There was a statistically significant correlation between the functional disability and back pain history before pregnancy (t=-3.058 p=.003). In conclusion, we found that a history of back pain was an important factor when predicting back pain and functional disability and limitation during pregnancy. The nurse and the prenatal educator should detect risk factors of back pain early in pregnancy and manage continuously though pregnancy.

• Journal of the Korean Society of Marine Environment & Safety
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• v.28 no.4
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• pp.459-468
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• 2022

Long-term data analyses and bioassay experiments were conducted to assess limiting nutrients in Cheonsu Bay and Taean sea. First, long-term nutrient data (2004-2016) provided by the National Water Quality Monitoring Network were used to assess potential limiting nutrients. Analysis of the long-term data showed that the dissolved inorganic nitrogen/dissolved inorganic phosphate (DIN/DIP) ratio was mostly below 16, with N limitation being dominant. A subsequent analysis using the concentration ratios of N, P, and Si showed that N limitation was dominant during summer and autumn but that Si limitation occasionally occurred during winter and spring in relatively limited areas. However, the dominant limiting nutrient was not determined. The nutrient analysis of the field water collected during the bioassay experiment showed that DIN/DIP revealed P limitation at all stations in March and May, whereas N limitation was dominant in July and October. In the analysis using the concentration ratios of N, P, and Si, P and Si limitation appeared in March and May, but there were points with no dominant limiting nutrient. However, N limitation was dominant in July and October. In the bioassay experiment for assessment of the actual limiting nutrient, the results showed no specific limiting nutrient in March, whereas NH₄⁺ and NO₃^- showed responses in May, July, and October, which confirmed that N was a substantial limiting nutrient directly involved in phytoplankton growth during this period.

• KSBB Journal
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• v.5 no.1
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• pp.9-17
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• 1990

The growth and fermentation profiles of Clostridium acetobutylicum KCTC 1037 were examined in batch and continuous modes with pH variation and phosphate limitation. Clostridium acetobutylicum KCTC 10 37 grew better at pH 4.5 than at pH 5.5 or 6.5. Acetate and butyrate were produced at pH 5.5, whereas culture at pH 4.5 produced acetone and butanol. Solvent production was increased by the phosphate limitation in a batch culture, but in a phosphate-limited continuous culture for 400 hours steady-state solventogenesis was not observed. The induction and maintenance of solventogenesis presumably require not only acidic condition or phosphate limitation but also favourable bioenergetic condition.

• Korean Journal of Microbiology
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• v.38 no.4
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• pp.318-321
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• 2002

To induce recombinant protein under phosphate restricted conditions such as soil, we have constructed the expression vector (pEAAP) with phoA gene promoter of Enterobacter aerogenes. To construct the pEAAP, deletion of the T7 promoter and lac operator from pET-22b(+) by BglII-XhoI digestion and addition of the phoA gene promoter (containing the pho box) were performed. To test pEAAP as an expression vector controled by phosphate limitation, pEAPHY1 was constructed with the phytate gene (Bsa-phy1) of Bacillus subtillis var. amyloliquefaciens (KCTC 8913P). Under the phosphate-limitation condition, CK-PHY1 ( Escherichia coli JM109 was transformed with pEAPHY1) expressed the 41 kD Bsa-Phy1 . Also CK-PHY1 formed the clear zone in solid medium containing phytate as a sole phosphate source.

• THE INTERNATIONAL COMMERCE & LAW REVIEW
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• v.22
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• pp.201-226
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• 2004

P & I Clubs are mutual and non-profit making insurers which offer shipowners cover for the contractual and third-party liabilities. Whereas most shipowners obtain P & I insurance to cover for their legal liabilities, they also obtain hull insurance to cover against damages to the hull of their vessels from commercial hull insurers. P & I insurance was distinguished from hull insurance in respect that it offered non-limited cover to shipowner member, but there was a serious debate between P & I Clubs in respect of the non-limited cover. A compromise by International Group of P & I Clubs eventually emerged under which, with effect from 20 February 1997, a financial cap was placed on the obligation of each shipowner to pay catasrophe calls to his club(20% of each ship's property limitation fund under 1976 Limitation Convention). Nevertheless many shipowners felt that this new cap on their potential catastrophe call had been set still too high, while others resisted any reduction in the figure established by the compromise. In the Meantime, the European Commission issued a Statement of Objections in June 1997, in which it indicated its objections with a compulsory single limit common th all the Group clubs as high as the 1997 compromise. Eventually the board of all the Group clubs decided that the figure of 20% of the Limitation Convention per ship property funds should be dropped down to 2.5% from 20 February 1999.

• Journal of the Korean Society of Physical Medicine
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• v.15 no.3
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• pp.109-116
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• 2020

PURPOSE: The objective of this study was to provide a basis for the need to apply psychological factors-based rehabilitation programs to osteoarthritis patients by understanding how the limitations on the activities of osteoarthritis patients relate to the health-related quality of life and depression. METHODS: This study assessed 1,994 osteoarthritis patients from the 7th Korea National Health and Nutrition Examination Survey (KNHANES, 2016-2018). The subjects were divided into two categories: with activity limitation and without activity limitation. A Chi-square test and logistic regression analysis were conducted. RESULTS: The EQ-5D index of subjects with activity limitation was .84 ± .16, it was .94 ± .12 in those with no activity limitation (p < .05). The diagnosis of depression was 16.8% and; 8.3% in those with and without activity limitation, respectively (p < .05). There was a significant difference in the odds ratio for each item in the EQ-5D. Moreover, the odds ratio for depression with an activity limitation was 2.171 (1.512 - 3.118) compared with no activity limitation. CONCLUSION: The activity limitation of osteoarthritis patients reduces the health-related quality of life significantly and increases the probability of depression. Therefore, the treatment of osteoarthritis patients should be approached considering the psychological conditions. Moreover, early diagnosis of depressive symptoms is needed to prevent symptom deterioration and increase the compliance with rehabilitation therapy.

• Korean Journal of Ecology and Environment
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• v.41 no.4
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• pp.554-562
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• 2008

To evaluate the limitation for epiphytic and planktonic algal growth, acid extractable inorganic phosphorus (AP), implying the luxury uptake phosphorus, was measured in five reed zones of Lake Biwa. The AP in epiphytic substances was 0.7 to 1.4 mg P surface stem $m^{-2}$ in summer and 1.2 to 2.8 mg P $m^{-2}$ in winter. On the other hand, the amount in planktonic substances was 1.4 to 5.7 mg P m -3 and 0.8 to 5.4 mg P $m^{-3}$ in both seasons. Contribution of AP in the epiphytic and planktonic phosphorus was 23 to 31% and 8 to 27% in summer, and 17 to 22% and 9 to 17% in winter. It suggests that in summer both epiphytic and planktonic algae had been luxuriously taken up phosphate into cells. The weight ratios of C : N : P were averaged 79 : 20 : 1 for the epiphytic substances and 81 : 12 : 1 for the particulate substances. On the other hand, the ratios without the luxurious phosphorus were 93 : 24 : 1 and 103 : 15 : 1, showing much higher values than the Redfield ratio. High ratio in the epiphytic substances indicates that the phosphorus is the limiting parameter, rather than nitrogen, regulating the growth of epiphytic algal populations.

• Journal of the korean society of oceanography
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• v.34 no.2
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• pp.86-94
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• 1999

An investigation was conducted to determine limiting nutrients in the bay systems of the southern coastal area of Korea. The elemental composition of C, N, and P in suspended particulate matter was monitored nearly monthly in Chinhae and Koje Bays and seasonally in Deukryang Bay for 2 years. Atomic C:N ratio in particulate matter ranges from 4.3 to 9.6, typical of marine phytoplankton. C:P and N:P ratios vary from the Redfield ratio to 229 (C:P) and 37 (N:P). A constant C:N ratio of 6.87 from regression of particulate C and N concentrations demonstrates that the particulate matter in the systems originates from primary production. C:P and N:P ratios from regression of C on P and N on P are well associated with changes in salinity. The low N:P ratio of 13.1 implies N limitation in the environments of the systems. This seems to result from the low N:P ratio of nutrients released across sediment-water interface. Phytoplankton response, expressed here as the increase of chlorophyll a, to N addition also verifies N limitation for phytoplankton communities. In heavy rainfall season (from June to September), the addition of excessive N via streams into the stratified coastal water proliferates phytoplankton greatly. During the phytoplankton blooms, C:P and N:P ratios are much higher than the Redfield ratio, implying P limitation. This results from the high N:P ratio in nutrients supplied from stream waters. Strong stratification during the blooms also interrupts the supply of nutrients, particularly p, from bottom waters. Dependent upon precipitation, this tendency shows great inter-annual variation.

• The Journal of the Korea Contents Association
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• v.18 no.6
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• pp.453-460
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• 2018

This study was to identify the prevalence rate of the limitation of activity, the reasons for activity limitation, association with activity limitation and general characteristics among older adults in Korea's population. Data were extracted from the $7^{th}$ Korea National Health and Nutrition Examination Survey. The number of participants were 1,578 older adults who aged 65 years over. SPSS program (version 18.0) was used for analyzing on frequency, Chi-square test, and logistic regression analysis of the data. The total prevalence rate of activity limitation among Korea's population was 19.6% in 2016. The prevalence rate of the reasons for activity limitation in Korea was highest for neck and back problems(19.8%), followed by arthritis and rheumatism(17.1%). The prevalence rate of activity limitation was statistically significant associated with age and education level, respectively. In conclusion, Age, educational level, and musculoskeletal diseases such as problems related to back and neck, arthritis and rheumatism could be significant risk factors for activity limitations in older adults who aged 65 years over. These findings could be useful as evidence-based data for relieving the prevalence rate of activity limitation and the prevention and management of activity limitations in Korea population.