• Title/Summary/Keyword: the 7th Korean National

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Estimation of Sedimentation and Particle Mixing Rates in Ulleung Basin of the East Sea (Sea of Japan) Using $^7Be,{\;}^{234}Th,{\;}^{210}Pb,{\;}and{\;}^{137}Cs$

  • Kim, Kee-Hyun;Park, Nam-Joon
    • Journal of the korean society of oceanography
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    • v.38 no.4
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    • pp.157-165
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    • 2003
  • In order to understand the characteristics of sedimentary environments in Ulleung Basin of the East Sea (Sea of Japan), three sediment cores were taken with a box corer during R/V Tamyang cruise in October 1999. Activities of $^{7}Be,{\;}^{210}Pb,{\;}^{226}Ra,{\;}^{234}Th,{\;}^{238}{\;}and{\;}^{137}Cs$ in sediment samples were determined by non-destructive gamma-ray spectrometry. Rates of sedimentation and particle mixing were estimated by best fitting an advection­diffusion particle mixing model to the data of $^{7}Be,{\;}^{234}Th,{\;}and{\;}^{210}Pb$. Estimated sedimentation rates were 0.06-0.08 cm/yr and particle mixing rates were $0.13-0.65{\;}\textrm{cm}^2/yr$. The use of multiple tracers in our study prevented us from probable up to 38% overestimation of sedimentation rates.

The Comparative Analysis of Questions in the Matter Units of Elementary Science Textbooks between the 7th Curriculum and the Revised Curriculum Year 2007 (제7차와 2007년 개정 교육과정의 초등 과학과 교과서 물질 영역의 발문 유형 비교 분석)

  • Choi, Mi-Suk;Kim, Yong-Gwon
    • Journal of Korean Elementary Science Education
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    • v.31 no.3
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    • pp.347-357
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    • 2012
  • The focus of this dissertation is on the comparative Analysis of Questions in the 'Matter Units of Elementary Science Textbook between the 7th Curriculum and the Revised Curriculum Year 2007. The results of the comparative Analysis in the dissertation are as follows: There were more closed questions than open questions in these elementary science textbooks both of the 7th Curriculum and the Revised Curriculum Year 2007. Cognitive-memory questions were the most frequently asked in all grade levels. In the Revised Curriculum Year 2007, Convergent thinking questions presented with higher rate than the 7th Curriculum. Divergent thinking questions and evaluative thinking questions was presented with a relatively lower rate than the 7th Curriculum. Question types were applied based on the characteristics of each unit rather than on children's developmental characteristics.

Variation in Functional Component Levels in Bitter Gourd (Momordica charantia L.) among Different Harvest Seasons (여주의 수확시기별 기능성성분 함량 변화)

  • Park, Young-hie;Lee, Nagyeom;Ryu, Su-Noh
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.63 no.1
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    • pp.72-75
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    • 2018
  • This study was conducted to investigate changes in the functional compounds in bitter gourd (Momordica charantia L.). Four treatments were used to analyze vitamin C, momordicin, K, Mg, and Ca compounds in Dragon bitter gourd on the 7th, 14th, 21st, and 28th days after pollination. According to the number of days after pollination, level of chemicals containing vitamin C in bitter gourd appeared to decrease continually after pollination, and was the highest, being 74.7 mg/100 g on the 7th day. The level of momordicin, an anti-diabetic was significantly higher in the 7th-day product than that of the 14th day;, meanwhile, there was no significant difference in Ca compounds. These phenomena are considered to fasten the stages of harvest for effective use of functional ingredients in bitter gourd fruits.

Comparative Analysis of the Function and Structure of Photographs and Illustrations Used in High School Earth Science Textbooks of the 6th and 7th National Curriculum (6차와 7차 교육과정에 따른 고등학교 지구과학 교과서에 사용된 사진과 삽화의 기능 및 구조 비교 분석)

  • Lee, Ki-Young
    • Journal of the Korean earth science society
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    • v.28 no.7
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    • pp.811-824
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    • 2007
  • Photographs and illustrations are integral parts of current science textbooks' inscriptions. This study analysed and compared the function and structure of photographs and illustrations used in high school earth science textbooks of the 6th and 7th national curriculum. The findings of the function analysis showed that 'illustrative' function was far superior to other functions in terms of frequency and ratio. The illustrative function varied more in the 7th curriculum textbooks, especially in earth science I. 'Explanatory' and 'complementary' functions, which were relatively ignored in the 6th curriculum, significantly increased in the 7th curriculum textbooks. 'Decorative' function increased on the whole. The results of the structure analysis revealed that indexical reference remarkably decreased in the 7th curriculum textbooks, which means the retrogression of co-deployment with main text. 'Multiple' organized photographs and illustrations significantly increased in the 7th curriculum textbooks, while 'pair' and 'series' organization did not show an increase at all. It was suggested in this study that 'inquisitive' function and 'complementary' organization should be supplemented in terms of both function and structure. Moreover, the functional and structural aspects of scientific inscriptions including photographs and illustrations should be utilized by the certification criteria of science textbooks.

EFFECTS OF THE SINGLE AND FRACTIONATED IRRADIATION ON THE MICROVASCULATURE OF THE RAT SUBMANDIBULAR GLAND (단일 및 분할 방사선조사가 백서 악하선 미세혈관계에 미치는 영향)

  • Kim Seok-Ho;Choi Karp-Shik
    • Journal of Korean Academy of Oral and Maxillofacial Radiology
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    • v.23 no.1
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    • pp.71-85
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    • 1993
  • The purpose of the study was to investigate the effects of the single and fractionated irradiation on the microvascular structure of the submandibular gland in rats. For this study, 90 Sprague-Dawley strain rats were irradiated to their neck region with equal split doses of 9Gy for a 4 hours interval and 15Gy single dose by 6MV X-irradiation and sacrificed on the 1st, 3rd, 7th, 14th and 27th day after irradiation. The author observed histological changes at Hematoxylin and Eosin staining and PAS staining under a light microscope, and also observed distribution and structural changes of the microvasculature in rat submandibular gland using a scanning electron microscope by forming vascular resin casting. The results were as follows: 1. In the light microscopic examination, the microvasculature was slightly dilated and decreased in number on the 1st day after irradiation, and increase in number of microvasculature was observed on the 3rd day after irradiation. And then distribution of microvasculature was markedly increased on the 7th day after iradiation, but decreased on th 14th day after irradiation again. Such changes were greater in the single irradiated group than in the fractionated irradiated group. 2. The reaction to PAS staining on glandular cell was decreased on the 1st and the 3rd day after irradiation, and recovered on the 7th day after irradiation. The reaction was decreased on the 14th day after irradiation again, and recovered on the 28th day after irradiation. Changes were more apparent in the single irradiated group. 3. In the scanning electron microscopic examination, early changes of microvasculature were decreased capillary density, dilation of conduits and meandering. Increased capillary dentsity or anastomosis due to vascular reproduction and smooth curved running were observed on the 7th and 14th day after irradiation. Decreased capillary and smooth running tendency were observed on the 28th day after irradiation again. Such changes were greater in the single irradiated group than in the fractionated irradiated group.

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Replacement of Imported Timothy Hay with Domestic Italian Ryegrass Silage in a Horse Feedstuff (말에서 국내산 이탈리안 라이그라스 사일리지의 수입산 티모시 건초 대체 효과)

  • Kim, Ji Yung;Son, Jin;Lee, Bae Hun;Kim, Byong Wan;Sung, Kyung Il
    • Journal of The Korean Society of Grassland and Forage Science
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    • v.40 no.1
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    • pp.44-49
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    • 2020
  • This study was conducted to investigate the possibility of replacing imported Timothy hay (TH) with domestic Italian ryegrass silage (IRGS) as a horse feed considering feed quality, nutrient digestibility and feed price. Two experimental diets (TH and IRGS) were fed to six-headed Thoroughbred (body weight, 475.7±33.3kg) of the Korea Racing Authority of Wondang Stud Farm. The 3 head animals were assigned to Control group (TH) and Treatment group (IRGS), respectively. The nutrient digestibility was determined by the total collection method. IRGS is enough for using as a horse feed because its Relative feed value(RFV) was higher than TH and its fermentation quality is suitable for horses. Although no difference was observed in nutrient digestibility, Total digestible nutrients(TDN), and Digestible energy(DE) between Control and Treatment group (p>0.05), the fact that price of IRGS was much lower (53.7~62.4%) than that of TH indicates IRGS has competitive advantage over TH as a horse forage feed. The present study indicates that IRGS can be fully replaced with TH due to its superior economic value even though the similarity of its nutrient digestibility, TDN, and DE to TH.

Dead Lactobacillus plantarum Stimulates and Skews Immune Responses toward T helper 1 and 17 Polarizations in RAW 264.7 Cells and Mouse Splenocytes

  • Lee, Hyun Ah;Kim, Hyunung;Lee, Kwang-Won;Park, Kun-Young
    • Journal of Microbiology and Biotechnology
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    • v.26 no.3
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    • pp.469-476
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    • 2016
  • This study was undertaken to evaluate the immunomodulatory effect of dead nano-sized Lactobacillus plantarum (nLp) in RAW 264.7 cells and murine primary splenocytes. nLp is a dead, shrunken, processed form of L. plantarum nF1 isolated from kimchi (a traditional Korean fermented cabbage) and is less than 1 μm in size. It was found that nLp treatment stimulated nitric oxide (NO) production more in RAW 264.7 macrophages than pure live L. plantarum (pLp), and that the stimulatory properties were probably largely derived from its cell wall. In addition, nLp induced murine splenocyte proliferation more so than pLp; in particular, a high dose of nLp (1.0 × 1011 CFU/ml) stimulated proliferation as much as lipopolysaccharide at 2 μg/ml. Moreover, according to our cytokine profile results in splenocytes, nLp treatment promoted Th1 (TNF-α, IL-12 p70) responses rather than Th2 (IL-4, IL-5) responses and also increased Th17 (IL-6, IL-17A) responses. Thus, nLp stimulated NO release in RAW 264.7 cells and induced splenocyte proliferation more so than pLp and stimulated Th1 and Th17 cytokine production. These findings suggested that dead nLp has potential use as a functional food ingredient to improve the immune response, and especially as a means of inducing Th1/Th17 immune responses.

A Study on the Academic Achievements of Engineering College Students Educated by the $7^{th}$ National Education Process (제7차 교육과정을 이수한 공과대학 신입생의 학업성취도 연구)

  • Noh, Tae-Wan
    • Journal of Engineering Education Research
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    • v.14 no.5
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    • pp.10-13
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    • 2011
  • The 7th National Education Process, implemented in 2004, features student-oriented, selective educational programs with a wide range of optional subjects. In 2005, reflecting this revised National Education Process, the College Scholastic Ability Test began allowing individual students to choose the subjects for examination they would like to take. As a result, the deviations of the college freshmen's academic achievements in some subjects have noticeably widened. This study shows academic abilities of the students on some subjects by comparing the results of 2008 College Scholastic Ability Test with that of the Basic Academic Ability Evaluation Test for freshmen in engineering college of Hongik university. Lastly, this paper presents some improvement plans in order to better accommodate students with academic achievement levels lower than what is expected by the university.

A Study the 7th Revised Curriculum Development for the Fisheries and Merchant Marine High School (수산·해운계 고등학교 제7차 교육과정 각론 개정 연구)

  • Kim, Sam-Kon
    • Journal of Fisheries and Marine Sciences Education
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    • v.12 no.1
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    • pp.83-97
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    • 2000
  • This article refers to the processions and the improvement of the 7th revised curriculum development for the Fisheries and Merchant Marine High School, published at Dec. 30, 1997. The general point of the 7th revised curriculum development was to cultivate creative Korean who will lead the epoch of globalization and information and to perform the learner-centered curriculum. Moreover, it defines the nature of Business High School not as completive but as continuing education. Based on this view, the improvment of 7th revised curriculum has been searched in varous sides. The group of general researchers and cooperators consisted of 12 members who were of university professors, teachers, related business men and executives in the administration branches, and the total researchers of 7th revised curriculum development were 90 members. The basic orientation of the research for the revised curriculum development was as following : The improvement of basic ability, job-analysis ability, integrity of theory and practice, acquisition of the certificate of national qualification, interrelation and cooperative role division between school and industrial fields, extension of self-decision ability of school and local society, protection of learner-selection right and maintaining close relations with the business-educational organization under life-long education system. Thus on the whole, the research for educational goals and contents, instructions, learning theory and evaluation is being processed with a high activity, based on the above mentioned plan of 7th revised curriculum development. At the same time, the methods and the models are being investigated. At last, it is to be noted that, in such as the 7th revised curriculum development research in this case, the effort should not be spared to harmonize the basic technological knowledge of the specialists in the Fisheries and Merchant Marine field and the cultural, liberal arts of personality education.

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