• Korean Journal of Food Science and Technology
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• v.38 no.6
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• pp.779-784
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• 2006

To produce bio-active Kochujang, 1.2% of pomegranate powder, 1.0% of hawthorn berry extract powder, 0.01% of ginko biloba extract, 1.2% of red yeast rice powder, 1.2% of silk powder, 0.2% of garlic oil, 0.2% of chitosan, 1.2% of wax gourd extract powder, and 1.0% of pine mushroom were added individually with raw materials that are needed for Kochujang process. These Kochujangs were fermented for 45 days at $30^{\circ}C$, and examined for changes in their physicochemical properties. There were no significant differences in pH, acidity, formol-N content, color and total cell count by plate count agar between Kochujangs fortified individually with functional ingredients and the control Kochujang. When 0.2% of garlic oil was added, antioxidant activity of its Kochujang product increased twice as much as that of the control Kochujang. Improved ACE inhibiting activities were observed in 1.2% of red yeast rice powder. When 1.2% of silk powder or 0.01% of ginko biloba extract were added, antithrombotic abilities were remarkably enhanced up to two times of the control Kochujang.

• Journal of Sericultural and Entomological Science
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• v.37 no.1
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• pp.1-5
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• 1995

The fertilities of indigenous and cultivated mulberry species(varieties) which were polli nated with Morus nigra L. brought from Turkey were investigated. The percentage of ripening sorosis was very high in indigenous species, Morus tiliaefolia Makino and cultivated variety, Keomseolppong and it was around 50% in both Daeryukppong and Cheongilppong However, the flowers of Morus bombycis Koidz. (BOM5-8) and Yongcheonppong fell after pollination. Looking at the sizes of seeds, they are also various. Generally, it was extremely small in Morus tiliaefolia, but it was medium in Keomseolppong, Cheongilppong and Daeryukppong. The fertilization percentage was generally low with 32-42% in the varieties, but it was comparatively high in Keomseolppong and Morus tiliaefolia. The seed germination percentages of Daeryukppong and Morus tiliaefolia are 88.0% and 23.6%, respectively, but it was below 2% in Cheongilppong and Keomseolppong. The cross success percentages are 14.2% and 8.0% in Daeryukppong and Morus tiliaefolia, respectively, but it was below 0.3% in Cheongilppong and Keomseolppong.

• Korean Journal of Food Science and Technology
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• v.30 no.2
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• pp.407-412
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• 1998

The proteins extracted from beef, pork and chicken meats were irradiated with up to 100 kGy at room temperature. The extracted proteins were evaluated on their in vitro digestibility by incubating successively with pepsin and pancreatin conjugate. Amino acid compositions and SDS-PAGE pattern were also analyzedin for these proteins. Gamma irradiation within the applied dose range (up to 100 kGy) produced negligible in in vitro digestibility and amino acid composition. Analysis of gamma-irradiated proteins by SDS-PAGE revealed radiolysis of ovalbumin to proteins or peptides with lower molecular weight. On the other hand, the proteins directly extracted from irradiated meats containing moisture were also evaluated for their in vitro digestibility, amino acid compositions and SDS-PAGE pattern. However, the results obtained from this experiment were similar to those of irradiated proteins after extraction from the meats.

• Journal of Korean Elementary Science Education
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• v.34 no.1
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• pp.86-94
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• 2015

This study is to investigate how do elementary students' eye movements appear in cognitive process that they perceive science learning materials depending on motivation system of science learning. For this study we had a random sampling of 301, 6th grade students. And we had selected 32 students through the three tests for the final; motivation system test of science learning, a learning styles test, an Edinburgh inventory for handedness test. We were analysis the cognitive process during learning tasks for the selected student using eye-tracking equipment. The results of the research are as follows: First, when students see a science learning material, we found out that SL-BAS group that has tendency searched various areas than SL-BIS group in learning task. Second, results confirmed through the data of integrational count that students looked alternately texts, images and graphs in the learning material, SL-BIS group were more than SL-BAS group on integrated count, but they had a simple and insignificant eye movement. Especially SL-BAS students showed that integrated eye movement between texts, images and graphs in the learning material, and they explored important areas of the graph compared with SL-BIS group that there was no eye movement in graph. These results may be utilized as a useful resource for designing students' learning.

• Current Research on Agriculture and Life Sciences
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• v.28
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• pp.39-46
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• 2010

Selection procedures for breeding lines resistant to both bacterial wilt caused by Ralstonia solanacearum and Phytophthora blight caused by P. capsici were executed to generations from $F_2$ and $BC_1F_1$ to $F_4$ and $BC_1F_3$ of crosses between a Phytophthora resistant breed, 'Chilbok No. 1' and bacterial wilt resistant accessions introduced from Vietnam during 2009 and 2010. The breeding populations or lines were tested for resistance to P. capsici and resistant plants were selected. The resistant selections were inoculated with R. solanacearum to discard susceptible plants. Resistance to P. capsici was conspicuously improved by selection from $F_2$ and $BC_1F_1$ and the final selections showed a similar level of resistance to P. capsici as a commercial Phytophthora resistant cultivar, Muhanjilju. A few $BC_1F_2$ selections were crossed to a cytoplasmic male sterile line, Chilbok-A, to identify their nuclear genotype interacting with male sterile cytoplasm. Majority of them was fixed to maintainer (Nrfrf) and only two resulted segregating into male sterile and male fertile plants indicating that the pollen parents were heterozygous in the fertility-restoring gene.

• Journal of Korean Society of Transportation
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• v.20 no.3
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• pp.69-82
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• 2002

The objective of this study is to evaluate the performance of macroscopic traffic flow models with the analytical and field data. Five candidate models were selected as follows ; Lax Method Model, Upwind Scheme Model, Hilliges'Model, Papageorgiou's Model, and Cell-Transmission Model. In the analytical test scenario, the traffic condition was assumed that could cause the building and dissipation of queue, and each model was compared with analytical solutions and the numerical results. An analytical test indicated that both simple continuum and high order continuum models are able to reproduce queue building and dissipating behavior in a reasonable way A field test has shown that Upwind and Papageorgiou's model show similar performances. Considering the simplicity in model formulation and numerical computation, we firstly recommend Upwind scheme model , and secondly Papageorgiou's model that performed will to represent traffic flow in tests as candidate models for further development of simulation model for Naebu expressway in Seoul.

• Journal of Science Education
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• v.38 no.1
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• pp.160-167
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• 2014

A land and sea breeze and the cause of wind are learned through a convection current box experiment in elementary science class. The purpose of this study was to investigate elementary students' perception and inferring process about a land and sea breeze. For this purpose, the 159 elementary students who lived in J city were collected. The results of this study showed that the students who perceived correctly about a land and sea breeze and the cause of wind were only 45 persons(28.3%). And most of the students understood the direction of the wind as they observed in the experiment. That is, most of the students did not understand a direction of a land and sea breeze by a inferring process from the experimental result. They did not pass by a inferring process. These results demand that a new convection current box experimental set is to be developed, as well as the experimental instruction more focused on the inferring process, for the perception of a land and sea breeze and the cause of wind.

• Microbiology and Biotechnology Letters
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• v.17 no.5
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• pp.440-446
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• 1989

Penicillium sp. CB-20 was selected for its strong polygalacturonase activity among various strains of molds found in soil. It was found that the production of polygalacturonase reached to maximum when on the wheat bran medium containing pectin as carbon source, the strain was cultured for 60 hours at 3$0^{\circ}C$. The enzyme was purified to 29.21 food by ammonium sulfate treatment, Sephadex G-25, G-15, G-150 gel filtration, DEAE-cellulose and DEAE-Sephadex A-50 ion-exchange chromatography. Yield of the enzyme purification was 2.31 %. When the purified enzyme was applied to sodium dodecyl sulfate polyacrylamide gel electrophoresis, the molecular weight was estimated 21, 000. The amino acid composition indicated relatively high contents of gultamic acid, glycine and histidine.

• Journal of the Korean Society of Earth Science Education
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• v.10 no.2
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• pp.199-213
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• 2017

The purpose of this study was to find out what pre-service teachers' views of as a good science class in evaluating class demonstrations. The study was conducted on 32 students in the second year of college who are attending teacher training schools located in central region, Korea. 32 pre-service teachers demonstrated the class with a group of 2 students, and a total of 16 lessons were demonstrated. They also evaluated the class by participating in 15 lessons except ones own class. Therefore all the collected evaluation papers were 480 sheets. This study analyze this evaluation paper and find out the good science class that earth science pre-service teachers think. As a result, the pre-service teachers' views of good science class analyzed by 3 categories. The three categories were 'Highly Engaged Instruction', 'Well-structured class design', and 'Qualitatively superior class materials'. In other words, the pre-service teachers' views that well-structured class design and active interaction were the requirements of good science class. This study confirmed that pre-service teachers can draw images of good science class through experience of class demonstration and class evaluation.

• Journal of the Korean Society of Earth Science Education
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• v.11 no.1
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• pp.38-54
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• 2018

The purpose of this study is to compare the concepts and inquiry activities of textbooks in Korea and Singapore textbooks focused on the field of geology, and to provide implications for the future development of Korean curriculum and textbooks. For the study, it was selected as the 2015 revised science textbook in Korea and 'My pals are here' that is the most used textbook in Singapore. The results of this study are as follows: First, Korea had a lower level of concept than Singapore. Second, we could confirm that Korea is composed of 'inquiry' centered compared to Singapore. Third, Korea deal with only one concept in one grade, however Singapore is structured so that concepts are divided hierarchically into several grades. Fourth, Singapore has been instructing students to learn how the learned concept interact with the Earth, which is different from Korea. These results may give implications for the curriculum composition and textbook development in Korea.