• The Korean Journal of Food And Nutrition
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• v.37 no.1
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• pp.17-29
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• 2024

To increase industrial applicability of Astragalus membranaceus (AM) as immunostimulating materials, hot-water extract (AME) was prepared from AM and fermented with Kimchi-lactic acid bacteria (Lactobacillus sakei & Leuconostoc mesenteroides) to prepare fermented AM-postbiotics (FAME). Although FAME prepared from AM-postbiotics did not show a significant enhancement in macrophage stimulating activity compared to non-fermented AME, crude polysaccharide (FAME-CP) fractionated by EtOH precipitation from FAME showed significantly higher macrophage stimulating activity than AME-CP. Compared to AME-CP, FAME-CP showed dramatic changes in component sugar and molecular weight distribution. FAME-CP was a polysaccharide with a major molecular weight distribution of 113.4 kDa containing Man (44.2%), Glc (19.3%), Gal (10.2%), GalA (10.2%), and Ara (7.4%) as sugar components. FAME-CP with enhanced macrophage stimulatory activity not only increased expression levels of mRNA genes encoding macrophage-activated factors (iNOS, TNF-α, MCP-1, IL-6, and COX-2), but also led the nuclear translocation of activated p65 and c-Jun. In conclusion, crude polysaccharide from AM-postbiotics fermented with lactic acid bacteria could increase industrial applicability as a functional material with enhanced immunostimulating activity than AME-CP.

• Proceedings of the Korea Contents Association Conference
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• 2017.05a
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• pp.139-140
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• 2017

본 연구는 공과대학 학생들이 배우는 전공영어로서의 특수목적영어(ESP)에 대해 코퍼스 기반 접근법의 유용성을 논하고자 한다. 이에 본 연구에서는 공과대학에서 사용하는 전공텍스트를 코퍼스로 구축하여 컴퓨터에 기반한 분석에서 나온 결과들을 제시하면서 공학영어 코퍼스의 특성을 살펴보고 궁극적으로 영어매개수업을 듣는 공대학생들의 데이터 기반 학습에 일조하고자 한다. 본 연구에서 사용된 목표 코퍼스는 세부전공과 상관없이 공통적으로 적용되는 공학과목을 선정하여 구축되었고 비교대상인 참조 코퍼스는 British National Corpus를 사용하였다. 공학영어 코퍼스는 총 단어 180만개, 단어 유형 만 6천여개로 이루어졌고 코퍼스 분석도구인 AntConc 3.4.4를 이용하여 빈도 분석과 키워드 분석이 수행되었다. 고빈도수 어휘의 분석결과 목표 코퍼스와 참조 코퍼스에서 가장 빈번하게 나타나는 어휘군은 내용어(content words)보다는 기능어(function words) 형태가 많다는 점이 나타났고 내용어군만 분석결과 참조코퍼스에 비해 공학영어 코퍼스에 과학영역의 변이어가 많이 분포하고 있음이 드러났다. 또한 키워드 분석에서는 공학영어 코퍼스의 키워드 동사군이 전문적인 어휘(technical vocabulary)보다는 비전문적인 학술적 어휘(non-technical academic vocabulary)가 상대적으로 많이 분포되어 있음이 드러나 ESP교육을 실시함에 있어서 전공관련 전문영어와 함께 일반적인 학술 영어에 대한 인식을 고양해야 할 필요성이 대두된다.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.56 no.6
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• pp.833-840
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• 2023

In this study, the antioxidant and anti-skin aging properties of the Korean marine algae Ishige foliacea were investigated. Solvent extracts from I. foliacea were prepared with 70% ethanol, 80% methanol, and water. The extraction yields of various solvent extracts ranged from 9.55% to 35.12%. In terms of antioxidant activity, the ethanol extract showed the highest ABTS (2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt) radical scavenging activity, nitrite oxide scavenging activity, reducing power, and FRAP (ferric reducing antioxidant power). Regarding anti-skin aging activity, evaluation of the skin whitening and anti-wrinkle activities revealed that the methanol, water, and ethanol extracts possessed the highest tyrosinase (IC₅₀=0.98 mg/mL), elastase (IC₅₀=0.15 mg/mL), and collagenase (IC₅₀=0.06 mg/mL) inhibitory activities, respectively. These results suggest that I. foliacea holds potential as an antioxidant and anti-skin aging substance in food and cosmetic materials.

• Journal of radiological science and technology
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• v.34 no.2
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• pp.131-140
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• 2011

This study is to investigate the satisfaction rate and relative factors from the students majored in Radiology, Clinical Pathology and Physical Therapy, which can provide basic knowledge of satisfaction and guide the university life and further careers. The survey was performed with respect to 107 students of Radiology, 97 of Clinical Pathology and 89 of Physical Therapy at three-year or four-year colleges(universities) located in Busan and Gyeongsangnam-do. The results show that the satisfaction rate through whole majors was $3.40{\pm}0.57$ point. The scores of each major are: $3.38{\pm}0.62$ for Radiology, $3.37{\pm}0.56$ for Clinical Pathology, and $3.45{\pm}0.50$ for Physical Therapy. The score of social status was highest and the environment of major was the lowest. The satisfaction of three-year colleges was higher than that of four-year universities. Academic system, social status and adaptation to major affected satisfaction on major. In addition job outlook affected on all majors. Thus, we propose that every major must be equipped with specialized environment different from general colleges (universities), and provide environment where students can cause self-motivation. In addition, we found the special way to improve social status and satisfaction by using career guidance, offering career information and performing university-industry collaborations. Especially, it is important to improve the satisfaction on major of students at four-year universities.

• Journal of dental hygiene science
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• v.12 no.3
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• pp.295-301
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• 2012

This study targeted students of advanced course for bachelor of dental hygiene at 15 universities, which are operating advanced course for bachelor of dental hygiene. This study was performed by questionnaire survey targeting students of advanced course for bachelor of dental hygiene. To analyze relationship between variables, the correlation was carried out. To verify influence of each variable upon participation level, multiple regression analysis was carried out. As a result of this study, the participation motive, expectation for educational institution, and educational satisfaction of students advanced course for bachelor of dental hygiene were found to have influence upon participation level. Based on the result, it is important to understand the participation motive of the students and to offer satisfaction environment and administrative support for enhancing the expectation for education for educational institution. Especially, given striving to enhance the satisfaction with teaching and the satisfaction with effect on advanced major courses, the university needs to make efforts to increase stature as higher education institution through advanced course for bachelor of dental hygiene.

• Korean Journal of Agricultural and Forest Meteorology
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• v.23 no.1
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• pp.15-33
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• 2021

In this study, the possibility of discriminating Fire blight (FB) infection tested using the hyperspectral imagery. The reflectance of healthy and infected leaves and branches was acquired with 5 nm of full width at high maximum (FWHM) and then it was standardized to 10 nm, 25 nm, 50 nm, and 80 nm of FWHM. The standardized samples were divided into training and test sets at ratios of 7:3, 5:5 and 3:7 to find the optimal bands of FWHM by the decision tree analysis. Classification accuracy was evaluated using overall accuracy (OA) and kappa coefficient (KC). The hyperspectral reflectance of infected leaves and branches was significantly lower than those of healthy green, red-edge (RE) and near infrared (NIR) regions. The bands selected for the first node were generally 750 and 800 nm; these were used to identify the infection of leaves and branches, respectively. The accuracy of the classifier was higher in the 7:3 ratio. Four bands with 50 nm of FWHM (450, 650, 750, and 950 nm) might be reasonable because the difference in the recalculated accuracy between 8 bands with 10 nm of FWHM (440, 580, 640, 660, 680, 710, 730, and 740 nm) and 4 bands was only 1.8% for OA and 4.1% for KC, respectively. Finally, adding two bands (550 nm and 800 nm with 25 nm of FWHM) in four bands with 50 nm of FWHM have been proposed to improve the usability of multispectral image sensors with performing various roles in agriculture as well as detecting FB with other combinations of spectral bands.

• The Science & Technology
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• v.32 no.7 s.362
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• pp.24-25
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• 1999

서울대 사범대 화학교육과 백명현교수는 요즘 초분자를 이용해 새로운 작품을 만들고 있다. 백교수의 전공은 무기화학으로 초분자소재 화학연구에 심혈을 기울이고 있는데 이는 거대한 분자를 이용해서 초분자를 만드는 연구로 그녀의 연구결과로는 기억매체로 응용될 수 있는 강자성 물질의 합성에 중요한 단서를 제공한다는데에 의미가 있다. 백교수는 이 분자체를 이용해 분자 벽돌담과 분자 벌집들을 합성해냈고 그 모양의 꽃무늬 레이스 같다고 하여 이름을 꽃무늬 레이스 초분자 라고 붙였다.

• The Science & Technology
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• v.32 no.6 s.361
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• pp.88-89
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• 1999

76년 10월 창립된 한국고분자학회는 고분자과학, 고분자공학, 화학공학, 화학, 공업화학, 섬유공학, 석유화학 등 다양한 전공의 과학자 3천여명으로 구성된 학술단체이다. 11개 상임위원회와 4개 지부를 두고 있는 고분자학회는 매년 봄ㆍ가을 학술대회를 서울과 지방에서 개최하고 있는데 발표되는 논문은 연 1천여편을 상회하고 있다. 또한 'IUPAC MACRO SEOUL '96'을 개최한 바 있는 고분자학회는 올해엔 한국ㆍ일본ㆍ중국ㆍ러시아 등의 대표들이 참가하는 제2회 동아시아 첨단 고분자심포지엄을 주최할 예정이다.

• The Science & Technology
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• v.29 no.9 s.328
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• pp.80-81
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• 1996

저유탱크의 부식으로 인한 오일 누출로 주변토양 및 수질 악화현상을 집중 연구하여 농작물의 품질과 생산량에 미치는 문제점을 밝혀낸 건국대 농공학과 도덕현교수. 도교수는 최근 채석장 등 암반 사면에 수목을 이식하는 부분 녹화공법을 했으며 전공서적 고교 교과서 편찬 13권, 논문 연구보고서 80여편을 발표하는 등 왕성한 연구활동을 계속하고 있다.

• The Science & Technology
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• v.30 no.12 s.343
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• pp.72-74
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• 1997

2세기 전 조선시대 천문학에 관한 책 '서운관지'를 쓴 성덕주는 대대로 천문학을 전공한 과학자 집안에서 태어났다. 그의 아버지, 형, 아들, 손자까지 모두 천문학자였는데 그가 쓴 '서운관지'는 당시 천문학에 관한 모든 것을 4권으로 나눠 총 정리한 전문서적이다. 지난 11월5일 작고한 유경로 교수는 '서운관지' 1권만 한글로 번역해 학회지에 소개한 후 별세하였는데 나머지 2,3,4권의 번역출간이 아쉽다.