• Korea journal of population studies
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• v.35 no.1
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• pp.131-149
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• 2012

This study examined the effect of parental socioeconomic position on the association between birth outcomes and infant mortality in early and late 2000's. Linked Birth and Infant Death data sets from 2001 to 2003 (T1) and from 2006 to 2008 (T2), provided by the Korea National Statistical Office, were used for analysis. Birth outcomes were categorized into four groups: normal term, small-for-gestational age (SGA), large-for-gestational age (LGA) and intrauterine growth retardation (IUGR). Infant death was defined as the death of a live-born child under one year of age; indicators of parental socioeconomic position were limited to parental education and occupation. The results showed that T2 infant mortality hazard ratios of SGA and IUGR have increased compared to T1. Particularly, preterm and low birth weight babies with shorter gestational age and lighter birth weight than T1 have elevated in T2, possibly indicating that population quality might be continuously aggravated. Moreover, the effect of maternal age on infant mortality has disappeared, rather that of parents' socioeconomic position has increased during the periods, which entailed growing disparities in infant mortality by their social class. Further studies should be therefore done to estimate the effect of parental socioeconomic position on the relationship between birth outcomes and infant mortality in the near future.

• Korea journal of population studies
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• v.33 no.1
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• pp.27-49
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• 2010

The aim of this study was to get answers to following research questions: Who are the busy people in such a speedy society like Korea? How the daily schedules of busy people might look like? What is the priority of activity that appear in their schedules?, And what is the gender difference? The sample of study came form the 2004 Korean Time Diary Data which have been collected by Korean National Statistical Office. The sample consisted of 11,976 married men and women, whose age range from 25-54 (women 49.7% of the sample). Dependent variable was time pressure measured in one item question with 4-likert scale. Socio-demographic factors and the amount of time in work/family role and other relevant activities were considered as well as gender. The results of the study showed us that men perceived more time deficit compared to women. Especially, employed men were the most time poor group, followed by employed women, unemployed women and unemployed men. The results showed that, even though there were similarities in the impact of relevant factors, men's time pressure were tightly linked with their work role and social status, while women's time pressure were responsive to both their role as a mother and as a worker. Nowadays, Korean fathers appear to face new expectation that they need to be involved in family just like mothers do. However, men and women still seems to traverse through different time path, which may create both burden and conflict to either party. Policy implication and detailed suggestions were discussed.

• Journal of the Korean Academy of Child and Adolescent Psychiatry
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• v.22 no.2
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• pp.112-119
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• 2011

Objectives : Obesity has been linked to various psychological problems as well as medical complications, especially among adolescents. Previous studies have suggested an association between body weight and depression or self-esteem ; however, there has been little evidence on self-perception of weight and mental health. The aim of this study was to examine the association of perceptional weight status with mental health in Korean adolescents. Methods : This study was based on data obtained from the third Korean National Health and Nutritional Examination Survey (2005). The study sample consisted of 583 adolescents (268 boys, 315 girls) aged 12-18 years, who had completed the health survey, the health examination, and the nutritional survey. Participants were divided into two groups based on the actual or perceptional weight status: non-obese and obese. Questionnaires for stress, depressive mood, and suicidal thoughts were utilized as mental health indicators. Results : The agreement between actual and perceptional weight status was moderate (k value, 0.585 ; p<0.01). The influencing factors for the discrepancy between actual and perceptional weight status were body mass index of subjects and their parents' education. The obese group was likely to have higher stress levels and more experience of depressive mood or suicidal ideation in regard to both actual and perceptional weight status. A multiple logistic regression analysis revealed that girls who had perceived themselves as obese were more likely to have an experience of depressive mood than other girls (unadjusted OR, 4.98 ; adjusted OR, 5.15). Conclusion : An experience of depressive mood was significantly associated with the perception of weight status and not actual weight status in Korean female adolescents.

• Clinical and Experimental Reproductive Medicine
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• v.20 no.2
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• pp.137-147
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• 1993

The purpose of this study is to identify the presence of the circulating antibodies directed toward ovarian proteins{antiovarian antibodies, AOA) and the nature of antigenic ovarian structure by comparing the binding activities to 4 types of ovarian proteins, particulated and solubilized forms of pig ovarian and granulosa cell membranes in sera of patients with premature ovarian failure(POF) and to evaluate the usefulness of circulating AOA as a follow up tool after treatment. Measurements of AOA were performed by enzyme linked immunosorbent assay(ELISA) in sera of 58 patients with POF, 51 had normal chromosomes and 7 had X chromosome abnormalities. Sera of 21 natural menopausal women and 17 castrated women were also tested and sera of 32 healthy premenopausal women were served as controls. ELISA reactivities against particulated porcine granulosa cell membrane proteins was the greatest among 4 different ovarian proteins. Fifteen(29%) of 51 POF patients with normal chromosome and 1(14.3%) of 7 POF patients with X chromosome abnormalities had AOA while none of 32 controls and 21 natural menopausal women and 17 castrated women had AOA. One POF patient with 47, XXX was identified AOA positive. The ELISA reactivities were followed up monthly up to 5 months in 4 AOA positive POF patients after estrogen-progestin{E-P) therapy. There was a decreasing tendency of the ELISA reactivities in all these patients after E-P therapy and two of them converted to AOA negative. These data suggest that antigenic structure may be components of granulosa cell membrane and the determination of circulating AOA may be useful in the follow up after treatment in patients with autoimmune POF.

• Korean Journal of Crystallography
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• v.16 no.1
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• pp.38-42
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• 2005

The crystal structure of Bis(ethylenediamine) cuprate(II)$\cdot$dichromate, $Cu(C_2H_8N_2)_2{\cdot}Cr_2O_7$, has been determined by X-ray crystallography. Crystal data: a=5.682(2), b=8.567(3), c=14.839(3) ${\AA},\;{\alpha}=97.50(2),\;{\beta}=101.06(1),\;{\gamma}=109.38(2)^{\circ}$ Triclinic, P-1 (SG No=2), Z=2, V=653.9(2) ${\AA}^3,\;D_c=2.030gcm^{-3},\;{\mu}=3.273mm^{-1}$. The structure was solved by Patterson method and refined by full matrix least-square methods uslng unit weights. The final R and S values were $R_1=0.0256,\;R_w=0.0708,\;R_{all}=0.0316,\;S=1.151$ for the observed 2291 reflections. The two cupper complex ion has the usual distorted octahedral structure with mean four Cu-N distances of 2.010(3) $\AA$ and the longer mean Cu-O distance of 2.525(2) $\AA$. The Cu-complex and dichromate ions are linked to form infinite chain arranged alternatively along the [111]-direction. The neighboring chains in the (0-11) plane are connected with N1-O5 and N3-O1 hydrogen bonds.

• Journal of dental hygiene science
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• v.14 no.2
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• pp.223-229
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• 2014

The aim of this study was to examine the effect of polycan-calcium gluconate complex on the levels of immune and inflammatory mediators in gingival crevicular fluid and serum from patients with periodontitis. A total of 39 patients with periodontitis took placebo (placebo group) or polycan-calcium gluconate complex (treatment group) twice a day for 4 weeks. At baseline and 4 weeks, gingival crevicular fluid (GCF) and blood was collected from each subjects. The secretion level of interleukin $(IL)-1{\beta}$ in GCF was measured by enzyme-linked immunosorbent assay (ELISA). Western blot analysis was conducted to determine the expression of matrix metalloproteinase (MMP)-8 and tumor necrosis factor $(TNF)-{\alpha}$ in GCF. Serum samples were analysed for MMP-8 by ELISA and C-reactive protein (CRP) by turbidimetric immuno assay. MMP-8 and $TNF-{\alpha}$ were significantly decreased in the treatment group at 4 weeks. The level of $IL-1{\beta}$ in the treatment group was significantly lower than those of the placebo group. No differences were observed in CRP levels. Taken together, these data indicate that taking of polycan-calcium gluconate complex led to reduction of inflammatory biomarkers in serum and GCF of periodontitis patients.

• The Journal of Advanced Prosthodontics
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• v.5 no.3
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• pp.287-295
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• 2013

PURPOSE. This study investigated the effect of laser parameters and air-abrasion on the peel strength of silicon-based soft denture liner to different denture resins. MATERIALS AND METHODS. Specimens (N=180) were prepared out of three different denture base resins (Rodex, cross-linked denture base acrylic resin; Paladent, heat-cured acrylic resin; Deflex, Polyamide resin) ($75mm{\times}25mm{\times}3mm$). A silicon-based soft denture liner (Molloplast B) was applied to the denture resins after the following conditioning methods: a) Air-abrasion ($50{\mu}m$), b) Er,Cr:YSGG laser (Waterlase MD Turbo, Biolase Technology) at 2 W-20 Hz, c) Er,Cr:YSGG laser at 2 W-30 Hz, d) Er,Cr:YSGG laser at 3 W-20 Hz, e) Er,Cr:YSGG laser at 3 W-30 Hz. Non-conditioned group acted as the control group. Peel test was performed in a universal testing machine. Failure modes were evaluated visually. Data were analyzed using two-way ANOVA and Tukey's test (${\alpha}$=.05). RESULTS. Denture liner tested showed increased peel strength after laser treatment with different parameters ($3.9{\pm}0.4-5.58{\pm}0.6$ MPa) compared to the control ($3.64{\pm}0.5-4.58{\pm}0.5$ MPa) and air-abraded groups ($3.1{\pm}0.6-4.46{\pm}0.3$ MPa), but the results were not statistically significant except for Paladent, with the pretreatment of Er,Cr:YSGG laser at 3 W-20 Hz. Polyamide resin after air-abrasion showed significantly lower peel strength than those of other groups ($3.1{\pm}0.6$ MPa). CONCLUSION. Heat-cured acrylic resin, PMMA, may benefit from Er,Cr:YSGG laser treatment at 3 W-20 Hz irradiation. Air-abrasion of polyamide resins should be avoided not to impair their peel bond strengths to silicon-based soft denture liners.

• Korean Journal of Social Welfare
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• v.59 no.3
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• pp.175-199
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• 2007

The study analyzes the characteristics, work stress, satisfaction and attitudes toward dementia of social care work force for dependent elders in Korea. Data were from 502 staffs including social workers, nurses, and direct care workers from 45 diverse type of nursing facilities in Busan and Daegu area. The results of the analysis indicate that they are low paid and overloaded in general. The respondents espoused highly hopeful and person-centered attitudes toward dementia and the elderly, while they showed low level of satisfaction related to work. The stress levels were higher in sub scales concerning care tasks and physical environments in work places. In addition, the results of multiple regression denote that those have higher level of satisfaction who are nurses, have no intension to quit, have more experiences of work education, and working in facilities with more frail elders. Stresses were closely related to higher level of education and the intension to quit. Person centered attitude was more often reported by those who have more elderly clients to take care of and are working in facilities with more elders who are demented and over 80. In particular, the association was consistent between higher level of job satisfaction and the person centered attitude. Several practical suggestions linked to the analysis were made including improving the welfare for staffs working in nursing facilities and providing continuous professional training and education for them particularly on person-centered care. In addition, it was emphasized to raise the morale of social care work force considering the rapidly increasing need of long term care and the important influence that care work force has on older persons' quality of life from now on.

• KDI Journal of Economic Policy
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• v.12 no.1
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• pp.3-29
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• 1990

Korean input-output tables for 1975 and 1985 are first deflated into 1975 constant domestic prices(hypothetical terms), and the constant price I-O data are used to decompose the sources of industrial growth and structural change during the 1975-85 period. Using the same methodology, our results for the 1975-85 period are then linked to the results for the earlier period(1955-75) in order to analyze and evaluate the "demand-side" sources of industrialization over the past three decades. The results from the decomposition of the whole economy indicate that over three decades(1955-85) the relative contribution of domestic demand expansion (DDE) to growth and structural change has continuously declined while the contribution of export expansion(EE) has generally continued to rise. The contribution of import-substitution(IS) which had been significantly higher than that of EE during 1955-63 declined substantially, remaining at an insignificantly low level during the period following 1963. Although it is well known that the government's industrial policy in the 1970s emphasized import-substitution in heavy and chemical industries, no significant changes in the export-oriented growth pattern could be observed even for that period, except for a minor decline in the relative contribution of EE. This may be attributed to the substantially larger, backward-linkage effects of EE than that of IS. The sources-of-growth decompositions for major branches of the manufacturing sector generally support the major conclusions derived from the decomposition for the whole economy. The IS contribution which had been significantly high in almost all manufacturing branches during the 1955-63 period declined to low levels in all but two branches, heavy industry and machinery, during the following period. On the other hand, the relative contribution of EE showed a continuous rise in almost all manufacturing branches(except food processing). Finally, the sources of growth for 1975-85 which were decomposed by detailed sub branches, are analyzed by correlating them with changes in relative prices and industrial protection rates by sub-branches for the same period. A major result is that contrary to general expectations, the EE contributions by sub-branch are not negatively correlated with the nominal rates of protection and/or the effective rates of protection for the same sub-branches. It is also found that no statistically significant, positive correlation exists between IS contributions and nominal protection rates or effective protection rates. These unexpected results may be explained by the peculiar nature of the Korean system of industrial incentives for the past period.

• Journal of Physiology & Pathology in Korean Medicine
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• v.17 no.3
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• pp.829-836
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• 2003

Seogakjihwang-tang (SJT) was widely used to treat patients suffering from cerebral infarction. But scientific investigation has been carried out very little. The aim of the present study is to investigate the effect of SJT on the production of various cytokines in the patients with cerebral infarction (CI). We investigated interleukin (IL)-4, IL-10 and transforming growth factor (TGF)-1 in the sera of 27 patients with cerebral infarction under consciousness disorders and 10 normal controls using an originally devised sensitive sandwich enzyme-linked immunosorbent assay (ELISA). We found that plasma levels of IL-4 were slightly elevated in patients with cerebral infarction, whereas plasma levels of IL-10 (P<0.001) and TGF-1 were reduced. Peripheral blood mononuclear cells (PBMC) obtained from the patient with CI were cultured for 24 h in the presence or absence of lipopolysaccharide (LPS) or phytohaemagglutinin (PHA). The amount of IL-4, IL-10 and TGF-1, in culture supernatant, was significantly increased in the LPS or PHA treated cells compared to unstimulated cells (P<0.05), We also show that increased cytokines IL-4, and IL-10 level was significantly inhibited by SJT in a dose-dependent manner. Maximal inhibition rate of IL-4 and IL-10 production by SJT was 45.63.3% and 614.7% for LPS-stimulated cell and 27.31.2% and 83.62% for PHA-stimulated cells, respectively (P<0.05). On the other hand, SJT significantly increased the LPS or PHA-induced TGF-1 production (P<0.05). These data suggest that SJT has a regulatory effect on the cytokines production, which might explain its beneficial effect in the treatment of CI.