• The Korean Journal of Food And Nutrition
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• v.20 no.4
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• pp.421-426
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• 2007

This study was carried out to investigate the properties of Kimchi made with potato as compared to Kimchi made with radish. The pH, acidity, hardness, and number of lactic acid bacteria were examined as properties of the Kimchi to determine the suitability of adding the potato and with focus on the possible duration of storage. First in the case of pH, the storage duration at pH $4.2{\sim}4.3$, which is the state for optimal tasting Kimchi, was approximately 10days in the control group, while that of the experimental group was 10 to 16 days, and thus, longer than the control. Second in the case of acidity, representing the maturity of Kimchi, we examined the time it took to reach 0.6% acidity, in which the experimental group took more longer time than the control. Although the experimental group was slower to mature than the control, the period for keeping at the proper pH was longer than that of the control group. Thirdly, in the case of hardness, which relates to softening, the experimental group had remarkably high values. This suggests that the Kimchi in the experimental group had a more rigid texture and more difficultly softening than the control group. Lastly in the case of the number of lactic acid bacteria, which closely relates to the process of fermentation, there were no significant differences. In conclusion, these results indicate that adding potato to Kimchi can extend its storage period.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.6
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• pp.98-105
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• 2016

Group play for sociality is a therapeutic method involving a mixture of various factors, such as targeted activities, perceptions, and physical mobility required in daily life, through group activities to encourage self-expression for the purpose of facilitating sociality. This study was conducted in order to verify its effects by applying it to autistic adolescents who lack communicative ability with others and ultimately to improve their interpersonal relationships and sociality. This study applied a single pre- and post-test experiment design to 8 autistic adolescents with lack of sociality who use a daycare center in Daejeon. The group play for sociality program consisted of two sessions a week for 7 weeks from October to December 2013 for a total of 14 sessions. The sociality of the adolescents before and after the intervention was analyzed by the Wilcoxon signed-rank test. As a result of the study, the total grades of the E-CLAC and social maturity test showed significant changes from $39.88{\pm}6.78$ to $47.00{\pm}4.28$ and $49.96{\pm}28.00$ to $61.36{\pm}21.75$, respectively. In detail, there were significant changes in the sub-items, such as adjustment in group, following guidance, and increasing behavioral frequency. In conclusion, it was shown that the combined effect of the group activities, including group play for sociality and play activities taking into consideration the developmental stage of the participants, led to a significant improvement in the sociality of the autistic adolescents.

• Journal of Periodontal and Implant Science
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• v.38 no.2
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• pp.163-170
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• 2008

Purpose: Biphasic calcium phosphates have been of great interest recently. Mixing adequate ratios of hydroxyapatite(HA) and beta-tricalcium phosphate($\beta$-TCP) allowed to control the resorption rate without distorting its osteoconductive property. This study evaluated the bone formation effect of newly developed biphasic calcium phosphate(BCP) in calvarial defect of rabbits. Materials and Methods: 6 male New Zealand rabbits were used. Four defects with 8mm in diameter were created on each animal. BCP with HA/$\beta$-TCP ratio of 7:3 and particle size of $0.5{\sim}1.0\;mm$ was used as the test group and bovine bone with $0.25{\sim}1.0\;mm$ particle size, as the control group. Both test and control group materials were randomly implanted in the calvarial defects and were covered witha polymer membrane. The animals were sacrificed after 12, 24, and 48 weeks of implantation under general euthanasia. Resin blocks were obtained and were stained by masson's trichrome for histological observation. Results: Overall results were uneventful without any defect exposure or inflammation. The amount of new bone formation and bone maturity increased with increase in healing period at both groups. New bone in test group was mostly formed along the material particle surrounded by osteoblasts, and observation of osteoblastic stream was also present. Bone maturity increased as it was closer to thedefect margins. Under the same healing period, the test group showed more bone formation than the control group with more stable bovine bone particles remaining even after 48 weeks, whereas considerable resorption took place in BCP. Almost total defect closure was observed in test group with new bone formation in the central part of the defect. However, limited new bone formation was observed in the control group. Conclusion: Within the limits of the study, the present study reveals the newly developed BCP to be a good osteoconductive material. However, further studies are needed to be conducted in a different study model with a larger sample size.

• Journal of Life Science
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• v.15 no.6 s.73
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• pp.979-986
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• 2005

Lead (Pb) exposure during development can produce neurological deficits. In this study, the effect of Pb exposure during neonatal development via lactation on anxiety of brain function was investigated. Long-Evans strain rats were raised through two generations. At the birth of the second generation, the dams were subdivided into two groups and supplied drinking water containing either $0.2\%$ Pb (Pb-treated group) or sodium (Na, Control group) acetate until weaning. Rats were sacrificed at 3 (weaning) and 11 weeks (maturity) for brain Pb and fatty acid analysis. Motor activity and elevated plus maze tests were initiated at 9 weeks. The brains in the Pb-treated group at weaning and maturity contained 1486$\pm$98 and $270{\pm}46$ ng Pb/g, respectively The control group showed the background level of Pb ($3.7{\pm}1.0_{ng}$ Pb/g) in both ages. The alterations in brain fatty acid composition induced by Pb exposure were more evident in 3 wks old than 11 wks old. For example, in 3 wks old, the percentages of $18:2_{n-6}$, $20:2_{n-6}$ and $18:2_{n-6}$ were decreased in the Pb-treated group with an increase in $20:4_{n-6}$ In motor activity test, there was a tendency of hyperactivity in the Pb-treated group compared with the control group but the difference was not significant. In elevated plus maze test, the Pb-treated group showed fewer numbers of visits to the open arms (P < 0.05), indicating that Pb exposure may lead to anxiogenic effect.

• Korean Journal of Child Studies
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• v.20 no.1
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• pp.29-44
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• 1999

A major concern in the area of moral education is to find an effective educational method capable of supporting maturity of moral reasoning in young children. The purpose of the present study was to evaluate the effects of distributive dilemma discussion on children's distributive justice reasoning. The subjects were fifty 5-year-olds selected from a kindergarten in the city of Kumi. 26 children participated in a 10 week discussion intervention; another 24 children constituted the control group. The experimental procedure consisted of 3 parts; a pre-test to determine the experimental and control groups, moral discussions on dilemma situations based on 10 stories for the experimental group, and a post-test for both groups. The moral discussions were audio-taped. The results showed that children in the experimental group used more varied and elaborate distributive justice reasoning as the discussions proceeded. Moral discussions facilitated distributive justice reasoning.

• Journal of the Korean Home Economics Association
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• v.40 no.4
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• pp.13-25
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• 2002

The objective of this study was to develop and verify the effectiveness of the career education program for unwed mothers to facilitate to consider their career plan and career orientation. The program of this study was based on the Super's developmental theory. The program was done twice a week totally 8 times. The subject of the program is unwed mothers from 16 to 25 years old. One-group pretest-posttest design was held. The quantitative and qualitative researches were carried out. In quantitative research, the Wilcoxon Signed Ranks Test was done with SPSS Window 10.0 to evaluate the effectiveness of the career education program. In qualitative research, the content of discussion in the course of group process, investigation, and the materials which were made from the group members were analysed to the objects of program. The results of this study was proven to develop career maturity, career decision level, and career identity. Finally, the meanings of this consequences were discussed.

• The korean journal of orthodontics
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• v.21 no.2 s.34
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• pp.341-351
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• 1991

Dental maturity is one of the index of physiological maturity indicators. To investigate the relationship between dental maturity and chronological age, the author took the orthopantomograms of 984 students, aged 7 through 17 years, having normal occlusion. The orthopantomograms were examined and calcification degree of each tooth on the left side was rated according to the method described by Demirjian. On the basis of findings of this study, the following results were obtained. 1. The root completion periods of mandibular permanent teeth were as follows; Central Incisor M $8.32{\pm}1.03\;years$ F $7.96{\pm}1.04\;years$ Lateral Incisor M $9.40{\pm}1.30\;years$ F $9.01{\pm}0.90\;years$ Canine M $12.81{\pm}1.24\;years$ F $11.42{\pm}0.94\;years$ 1st Premolar M $12.76{\pm}1.74\;years$ F $12.19{\pm}1.33\;years$ 2nd Premolar M $13.31{\pm}1.88\;years$ F $12.88{\pm}1.49\;years$ 1st Molar M $9.60{\pm}1.69\;years$ F $9.30{\pm}1.16\;years$ 2nd Molar M $14.38{\pm}1.73\;years$ F $13.96{\pm}1.63\;years$ 2. Sexual differences in same age group at given calcification stage were not significant statistically. 3. The developmental order in mandibular permanent teeth was as follows; a) central incisor, b) lateral incisor, c) 1st molar, d) canine and 1st premolar, e) 2nd premolar, f) 2nd molar.

• The Korean Journal of Malacology
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• v.25 no.1
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• pp.23-28
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• 2009

Samplings have been monthly collected in Jeju Island, Korea, using ser nets. A total of 759 individuals were sampled from June to November 2006. We analyzed mantle length distribution, monthly changes in maturity stages, maturation size and sex ratio. Mean Mantle length of the female specimens ranged from 6.7 to 50.3 cm and that of the male specimens ranged from 6.7 and 50.0 cm. The spawning period was November. The Mantle length at 50 % group maturity was estimated to be 17.1 cm. Sex ratio was 1 : 1.3 (male : female), suggesting the female population may be predominant.

• The korean journal of orthodontics
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• v.28 no.3 s.68
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• pp.409-417
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• 1998

The 123 left hand-wrist radiographs and menarcheal ages attained by direct questioning to patients or her mothers are used, in order to exploit the relationship between the bone maturity and the menarcheal age of girls in adolescence. The results were as follows, 1. The mean age at menarche was $12.31{\pm}0.99$. 2. The onset of menarche occurred at SMI 7 and SMI 8 ($73.33\%$). The onset of menarche was correlated with skeletal age rather than chronological age. 3. There was statistically significant difference among the time passed from menarche according to skeletal maturity level. 4. The distal epiphyseal union of radius began at about 20 months after menarche. 5. In comparision of the time intervals from menarche to radial epiphyseal fusion among early, average, and late menarcheal age groups, late group had lesser time interval than other two groups.

• Korean Journal of Ichthyology
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• v.21 no.2
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• pp.93-99
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• 2009

The maturation and spawning of Black seabream Acanthopagrus schlegeli were investigated using samples randomly collected in the Southern Sea of Korea from March 2007 to February 2008. The FL at 50% sex-changers maturity was estimated to be 26.7 cm. We estimated monthly changes in maturity stages and gonadosomatic index (GSI). The spawning period ranged from March to July, and the peak spawning occurred in May and June. The fecundity (F) was 839,600 eggs at 32.2 cm fork length (FL) to 2,894,913 eggs at 42.0 cm FL, and the relationship between FL and F was expressed as $F=1.264FL^{3.869}$ ($R^2=0.736$). The FL at 50% group maturity was estimated to be 25.8 cm for females and 19.0 cm for males. The sex ratio was 19.9% for female, 20.9% for early sex-changers, 28.7% late sex-changers, 30.5% for male.