• Journal of dental hygiene science
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• v.12 no.2
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• pp.103-108
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• 2012

A study was designed to evaluate the level of moral development in 450 pre-dental professionals of 2 educational institution in Jeollabukdo, Ik san city. Data were collected through self-reported questionnaires from October 2010. The Korean version of the DIT(Defining Issues Test) was adopted to evaluate level of moral development with the score of P(%) and stage. The data were analyzed by descriptive statistics, t-test, one-way ANOVA and Pearson's correlation coefficient. The mean scores of P(%) was 43.10 in dental students and 41.21 in dental hygiene students(p=0.190). The score of stage 5A was highest which was followed by S3, S4, S6, S5B, S2. The score of stage 5B and 6 revealed sigificant difference by groups. The score of stage 6 revealed significant difference by sex in dental students(p=0.003). In dental hygiene students, it's significant difference by religion(S5B, p=0.044), birth order(S2, p=0.027) and growth area(S4, p=0.015). As for the correlations between moral development and the score of the stage, the score of P(%) was negatively correlated with the scores of stage 2, 3, 4 and 5B. On the other hand, the score of P(%) was positively correlated with the scores of stage 5A and 6. In conclusion, for enhancing dental students' moral development it is necessary a systemic ethics education and program development in curriculum.

• Korean Journal of Animal Reproduction
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• v.20 no.1
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• pp.19-26
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• 1996

In the present study, we investigated devel-opmental ability and transgene expression of IVM/IVF derived porcine embryos following microinjection with SV40-LacZ. A total of 412 IVM/IVF derived embryos were used to examine developmental ability and transgene expression following DNA microinjection. After centrifugation, pronuclei were visible in 60.3% when examined between 18~21h after IVF. Development and transgene expression were assessed after 9 days in culture. The percentages of injected embryos reaching to the morula and blastocyst were significantly lower (P<0.05) than those of non-injected control embryos. However, the percentages of DNA microinjected embryos and non-injected embryos that developed to the blastocyst or hatched blastocyst stage in dual culture systems (NCSU23 and EMEM) were significantly higher (P<0.05) than those in NCSU23 medium alone. As the resuIt of X-gal staining, the proportion of positive embryos was 40~43% in morula and blastocyst stage embryos, however, mosaicism has been observed in the most putative transgenic morulae and blastocysts. In the PCR analysis, the percentages of embryos integrated gGH gene were 45.0 and 44.4% in morula and blastocyst stage, respectively. These results suggest that improved IVM /IVF system and culture condition increased the embryo viability and ex-pression of a microinjected transgene.

• Journal of Animal Science and Technology
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• v.44 no.6
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• pp.677-684
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• 2002

We have investigated the expression patterns of candidates for growth stage specifically expressed genes. The expression patterns of the EPV20, aldolase A, Translationally Controlled Tumor Protein (TCTP) and Adipocyte Differentiation Related Protein (ADRP) were examined by semiquantitative RT-PCR and northern blot analysis in skeletal muscle tissues of Hanwoo, especially in the longissimus dorsi at various growth stages. The EPV20 mRNA was expressed in longissimus dorsi tissue of Hanwoo, but there was no difference of expression levels during growth stages. Though the aldolase A gene was reported to be muscle-specific and regulated at developmental stages, the expression levels of aldolase A mRNA in the longissimus dorsi tissues showed little differences at various growth stages. The expression levels of TCTP which was reported as growth-related protein regulated at translation step were gradually increased during growth of Hanwoo. The expression levels of ADRP mRNA were rapidly increased at 24-month-old longissimus dorsi tissue of Hanwoo, and decreased at 30-month-old. Our data suggest that the ADRP gene show as growth-stage dependent expression and is related to fat deposition within muscular tissue.

• Geophysics and Geophysical Exploration
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• v.12 no.1
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• pp.163-171
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• 2009

Subcritical crack growth is one of the main causes of time-dependent fracturing in rock. In the present study, we investigated subcritical crack growth in rock in distilled water (pH = 5.7) and in an aqueous solution of sodium hydroxide (NaOHaq, pH = 12), comparing the results to those in air. We also investigated the effect of the pH in an aqueous environment. We used andesite and granite for all our tests. We determined the relationship between the crack velocity and the stress intensity factor using the double-torsion test under conditions of controlled temperature. We showed that crack velocities in water were higher than those in air, in agreement with other research results indicating that crack velocity increases in water. When we compared our results for NaOHaq with those for water, however, we found that the crack velocity at the same stress intensity factor did not change even though the pH of the surrounding environment was different. This result does not agree with the accepted understanding that hydroxide ions accelerate subcritical crack growth in rocks. We concluded that the pH at the crack tip influences subcritical crack growth, and not the bulk pH, which has little effect.

• Child Health Nursing Research
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• v.12 no.4
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• pp.495-505
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• 2006

Purpose: The purpose of the study was to describe growth and development of breast-fed infants and to depict experiences of breastfeeding mothers. Method: The data were collected from 145 infants and mothers participating in A Healthy Breastfeeding Infant Contest. The instrument used for this study was a self-report questionnaire completed by the participants and an evaluation record completed by the examiners. Results: The more specific results of the study are as follows: the weight of the infants was much higher than the Korean Standards. The height of infants was not significantly different from the Korean Standards except for 5 month old male infants. The results of Denver II showed all 145 infants were classified as normal. The breastfeeding experiences in mothers was as follows; 31.7% of the mothers breastfed for 5 months, 48.3% wanted to breastfed as long as the baby wanted. The mothers pointed out that the difficult problem in breastfeeding was insufficient breastfeeding room in public areas. What mothers want to know related to breastfeeding was, breastfeeding duration, time to begin solid food and recommended amounts, time to discontinue breastfeeding at sleep time and appropriate methods. Conclusion: Mothers' experience in breastfeeding was positive. We should provide mothers a comfortable place in public areas for breastfeeding. Based on the result of the study it's propose that health professionals must intervene in breast care during both antepartum and early postpartum periods.

• Journal of Aquaculture
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• v.18 no.1
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• pp.1-6
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• 2005

This study focused on spawning season, induce spawning, spawning and larval development of the Jicon scallop in Daehuksan Island of southwestern waters in Korea. The condition index and gonadosomatic index were used to investigate the reproductive pattern of the Jicon scallop. The major spawning season was from July to August, showing an unimodal gametogenic cycle per year. Several different tests were carried out to induce spawning of the mature male and female C. farreri. For females, the injection of serotonin, temperature induction technique and the combination of the both treatments produced significantly faster gamete release. Unlike females, males spawned only in response to the UV rays irradiation stimulation. Mean size of fertilized eggs was 69.5 $\mu$m in diameter. After fertilization, the zygote could be divided into 2 cells as early as 2 hours. It took about 8 hours to develop the 8-cell stage, about 20 hours to hatch trochophore larvae, and about 40 hours to be D-shaped larvae.

• KDI Journal of Economic Policy
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• v.14 no.3
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• pp.73-96
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• 1992

Korean economy has experienced rapid expansion of the service sector at the expense of the manufacturing sector since 1988, which was caused by the wage increase and the appreciation of Won. The government worried about the deindustrialization and the erosion of the international competitiveness, and various measures were taken to enduce labor force into the manufacturing sector. However, this article argues that the expansion of the service sector is inevitable phenomenon in the process of economic development, and the balanced industrial policies are desirable. In addition, the Uruguay Round Service Negotiations require liberalization of the service market and internationalization of the service industries.

• Journal of the Mineralogical Society of Korea
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• v.7 no.1
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• pp.1-13
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• 1994

The industrial minerals play an important role in mining sector. More than 70 % of total mineral production come from industrial mineral sector. This paper reviews geological occurrence of kaolin, pyrophyllite and limestone, and current demand-supply status of major industrial minerals in the Republic of Korea. The kaolin is mainly distributed in the Kyeongsang province, formed by deep weathering of Precambrian anorthosite on mountainside of gentle slope. The pyrophyllite mainly occurs in the Kyeongsang and Chulla provinces, formed by hydrothermal alteration of late Cretaceous andesitic and rhyolitic rocks. Pyrophyllite comprises massive and lenticular bodies and contains minor amounts of kaolin, alunite and pyrite, in some places andalusite and illite. The limestone(Great Limestone Series of Cambrian age) is distributed widely in the Kwangwon and Chungcheong provinces. The limestone bodies are approzimately 70 km long and 3 km wide, elongated NE-ward, and show high grade of CaO content. In 1992, the self-sufficiency ratio of 44 nonfuel (metallic and non-metallic) minerals was no more than 30 percent. However, the ratio of 27 industrial minerals (non-metallic) represents high value of about 72 percent. The export/productjon ratio of the industrial minerals shows decreasing patterns from 12.2 % in 1983 to 4.2 % in 1992. Also the import/production ratio shows rapidly decreasing pattern from 84 % in 1983 to 38.2 % in 1992.

• The Journal of the Korea Contents Association
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• v.10 no.7
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• pp.233-243
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• 2010

Thanks to the rapid advance of modern technology in industrial society, economic and material abundances have not only caused a variety of cultural industry to develop but also brought about the development of beauty treatment industry. Like this, the industry has continually expanded into the public rapidly by forming a new beauty trend along with the growth of mass media such as T.V, advertisement, vogue magazine, and film. And make-up is also broadening its artistic areas by utilizing various expression skills and consistently changing with beauty trends, which has influences on Make-up Illustration. As a result, it has been recognized as a new conception of 'art' expanding in interpretation of communicating with the masses under condition of modern culture and stressed in its part more and more. It is expected that Make-up Illustration playing an important role in the exchange of fashion trend information between beauty treatment industry and people will be studied in different-image-expression ways to raise its artistic value and be a useful material for research and creation activities in the foreseeable future by Make-up Illustration made of computer graphics.

• The Korean Journal of Malacology
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• v.13 no.2
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• pp.131-141
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• 1997

전북 김제시 심포에서 1994년 1월부터 12월까지 월별로 채집된 백합 Meretrix lusoria의 생식세포형성과정 및 생식주기를 , 조직학적으로 조사한 결과는 다음과 같다. 백합은 자웅이체이고 난생을 하며, 생식소는 내장낭의 간중장선의 하부로부터 족부의 근육부근까지 분포하며, 성숙되면 팽대되지만 방란, 방정 후에는 위축된다. 생식소는 많은 난자형성여포들과 정자형셩여포들로 구성되어 있다. 여포에는 호산성 세포와 미분화간충직들이 들어 있는데, 이들은 초기 생식세포의 영양물질로 제공되고 있으며, 생식소가 발달함에 따라 점차 소실된다. 초기활성기의 난원세포는 직경 10$\mu\textrm{m}$ 내외이며, 초기 난모세포는 난병을 여포벽에 부착한 채 성장을 하여 70$\mu\textrm{m}$ 내외의 완숙란으로 된다. 정원세포가 성장을 하여 정보세포, 정세포를 거쳐 변태를 마친 정자는, 정자형성소낭의 중앙 내강에 정자속을 형성한다. 방란, 방정을 마친 생식소는, 일부 미방출된 생식세포가 퇴화 흡수되면서 비활성기를 지나 이듬해 수온상승과 더불어 새로운 발달을 시작한다. 생식주기는 연속적인 5단계로 구분할 수 있는데, 초기 활성기(1-3월), 후기 활성디 (2-5월), 완숙기(4-8월), 부분 방출기(6-9월), 퇴화 및 비활성기(9-2월)로 구분할 수 있다. 산란은 6월 (22$^{\circ}C$)부터 9월 ($25^{\circ}C$)까지 지속되지만, 산란성기는 7월(27$^{\circ}C$)-8월(28$^{\circ}C$)이다. 생식소지수는 1월에 0.58을 나타내며 5월에 4.60으로 최대값을 나타낸 후, 6월부터 점차 감소하기 시작하여 12월과 1월에는 1.0미만에 머무른다.