• Journal of The Korean Association For Science Education
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• v.22 no.1
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• pp.40-53
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• 2002

This study was based on the analysis of earth and environmental science items in PISA 2000 data. The purpose of this study was to identify i) gender differences in scientific literacy, ii) item characteristics that favored either female or male, and iii) misconceptions that 15-years-old Korean students have in the field of earth and environmental science. The results revealed significant gender differences. Overall, male students demonstrated higher level of achievement than female students. On the other hand, amongst high ability students, female students outperformed male students in open-constructed items. Female students tended to score higher on items that required long answers or items related to scientific processes, whereas male students outperformed female students in science knowledge or items that required data interpretation. The study also revealed that a majority of Korean students had misconceptions in fundamental earth and environmental science knowledge, such as the direction of earth's axis and equator, and the causes of Greenhouse Effect.

• Korean Journal of Soil Science and Fertilizer
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• v.26 no.4
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• pp.259-264
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• 1993

Allelopathic chemicals exudated from plants stimulate or inhibit crops directly or indirectly. To prove the effects of allelochemics, we isolated and identified the compounds by bioassays on the monoculture and crosscropping cultre systems. p-Coumaric acid were exudated on all of the test crops such as tomato, red pepper, lettuce, chinese cabbage and sesame, but pyrogallol and phenylacetic acid on tomato. hydroquinone on red pepper and egg plant, pyrogallol on lettuce, and vanillic acid on chinese cabbage. The highest total concentration of allelochemics was $5,883{\mu}g$ on tomato, lowest was $220{\mu}g/g$ dry plant weight on sesame. On the cross-cropping culture of tomato-egg plant, tomato-red pepper, chinese cabbage-egg plant, chinese cabbage-red pepper and chinese cabbage-sasame, the plant height, aerial dry weight and total dry weight of the tomato and the chinese cabbage were inereased contrast with monoculture, but decreased greatly on red pepper and sesame. Growth rate of both crops on the cross-cropping culture of tomato-chinese cabbage declined, while that of chinese cabbage was increased but lettuce decreased on the chinese cabbage-lettuce cross-cropping culture contrast with monoculture.

• The Journal of the Korea Contents Association
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• v.14 no.8
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• pp.137-149
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• 2014

The purpose of this study is to elucidate the emotion-understanding of Korean and thus to find out the importance of their way of self-expression by exploring the sentiment of Korean as regards their way of communications and self-expression therein. The method of this study is, being presumed the Cheong as the Korean's sentiment, to define the differences of concept between the Cheong traditionally used by them and the emotion employed in the psychology or the theory of consultation. And also, this study examines the aforementioned importance under the presumption that the Cheong in the Korean Culture makes it difficult that their emotion-understanding and self-expression to be perfect in their way of communication. In order to attain such purpose in this study, it investigates how they have seen the emotion-understanding and self-expression as to the way of communication throughout Carl G. Jung's psychology and T oegye Yi Hwang's theory of Human Mind and Nature respectively in the Occidental and Korean's Ideology. The most important thing, to be enlightened in this study, in the way of communication and self-expression are the emotion come from the big-Self(Self) in Carl G. Jung's psychology and that of the righteous sentiment from the human nature in T oegye Yi Hwang's theory of Human Mind and Nature. In conclusion, it reveals that our behavior, unvaryingly in the Orient and the Occident, is not the rational subject but the emotional one to be reacted only if our minds are attached mutually.

• Korean Journal of Heritage: History & Science
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• v.53 no.1
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• pp.168-183
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• 2020

Efforts had been made to eliminate the brittleness unique to cast ironware from 5 BC up until the time that cast ironware became widely used. One of the techniques used to this end was to produce the cast ironware in one kiln and then anneal it in another kiln. This technique condensed or removed the carbon in the structure to eliminate the brittleness of cast ironware and enable forging. To clarify the nature of this technique, this study examined cast ironware made of malleable cast iron, which manifests the characteristics of the annealing technique for cast ironware excavated on the Korean peninsula, based on current steelmaking technology and research results from China and Japan. Results confirmed that all cast ironware made of malleable cast iron had been imported into Korea until the Proto-Three Kingdoms Period. Also, since the Chiljido (Seven-Branched Sword), which is housed at the Ishigami Shrine in Japan, appears to have been produced in the Korean peninsula, it is determined that Baekje in the 4^th century must have possessed such an annealing technique. At that time, however, iron was produced mainly with an iron bloom, and a large amount of forged iron was produced with a steel bloom smelted from an iron bloom. In addition, most of the cast ironware that was used previously, except for cast iron hoes, had been replaced by forged ironware. In other words, this annealing technique was not used frequently until the Three Kingdoms Period. However, it spread broadly during the Unified Silla Period in so much as it was identified in the Jangan-ri remains, which represented the regional hub of iron production and distribution.

• The Korean Journal of Pharmacology
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• v.27 no.1
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• pp.81-88
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• 1991

The bilateral castration of male mice was operated under light ether anesthesia, and the sham operated mice were considered as the uncastrated. The treatments of mice with the following steroids were started one hour after operation. Hydrocortisone 50 mg/kg (HC), dehydroepiandrosterone 250 mg/kg (DHEA), ${\beta}-estradiol$ 5 mg/kg (E2), and testosterone 20mg/kg (TS) were subcutaneously injected into male ICR mice at noon for four days. Animals were sacrificed in the next-morning (at 10-12 A.M.) after the last injection. The intestinal putrescine(PT) content was lower and the liver and intestinal spermine(SM) contents were higher in castrated mice(CM), comparing with those of uncastrated mice (UCM). The intestinal PT content of UCM was markedly increased HC. But all brain polyamines of CM were significantly decreased by it. And HC also increased the spermidine(SD) content of kidney and liver and the intestinal PT content in CM. E2 induced the marked increase of liver PT content with the moderate increase of renal SD in UCM. And E2 significantly increased the brain and liver PT contents and the all renal polyamine contents in CM. Both of DHEA and TS induced the increase of renal PT content in UCM, and they also induced the marked increases of all renal polyamines of CM. In addition, TS increased the brain SM of CM. These results suggest that the steroidal regulation mechanism of brain, kidney, liver, and intestine seems to be different from one another, and the renal activity of polyamine synthesis can be markedly enhanced by sex steroids.

• Korean Journal of Social Welfare
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• v.35
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• pp.453-474
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• 1998

This paper attempts to analyse the patriarchal characteristics of welfare states. Increasingly, debates on welfare states are explicitly focusing on the relationships between state, market and family. How these relationships are structured forms the core parts of the particular welfare states, that is they give shape to different welfare state regimes. Although welfare states have developed incresingly, there are some problems that sustain these states asymmetrical, unequal, even sexist. In this paper, I want to make these problems visible by the terms of gender division of labour, the model of male work and the changing characteristics of patriarchy. Firstly, from the feminist perspective, we can point the fact that the welfare states are structured by gender. Welfare states take it for granted that our socities are based on the assumption of gender division of labour, what is called male breadwinner/ female dependent. And the state takes this gendered family as the stereotype in our societies. Secondly, it is not sufficient condition for men and women to perform satisfactory life of work and family that welfare states provide childcare center on an extensive scale. This is because that our societies are runned by "the model of male work". Thirdly, we can find that the characteristics of patriarchy of welfare state are changing. These changes can be explained from the 'private patriarchy' to the 'public patriarchy', in other words, from the women's dependence to individual man to the dependence to the state/ public sectors. And also under these changes, we can find the potent possibilities for women to take economic activities and independent self-supports.

• Applied Biological Chemistry
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• v.18 no.2
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• pp.98-101
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• 1975

The components of Gardenia pigment in rind, flesh, fresh fruit and stored fruit, its heat resistance and stability in pH, its dilution and colour-degree were studied. The results are summarized as follows; 1. The components of CROCIN in fresh fruit and stored fruit were 0.0157% and 0.0136% respectively. One year storage of stored fruit resulted in the decrease of 15% of CROCIN. 2. The components of Gardenia pigment in flesh were contained nearly twice as much as in rind. 3. There were traces of ${\beta}-carotene$ and some unknown carotenoid pigments. 4. Gardenia pigment was stable at $100^{\circ}C$ for 60 minutes, but, at $150^{\circ}C$ for 30 minutes, nearly half of them was destructed. 5. Gardenia pigment turned to colurless but was stable in neutral or alkali condition after 10 days. 6. Supercially, dark Gardenia pigment looked yellowish red and thin Gardenia pigment looked yellow: however, each ${\lambda}_{max}$. was all the same.

• The Journal of Korean Philosophical History
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• no.25
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• pp.167-196
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• 2009

Youlgok's thoughts on mind are represented both in his one-road theory of mind, nature, emotion and will and in his one-way theory of Li riding on a dynamic Ki. The one-road theory has two meanings. First, it means that mind, nature, emotion and will are not separate things, but those three things other than mind belong to mind, which only different phases of mind. Second, it means that human desire and moral will, inborn nature and dispositional nature, four clues and seven emotions are not sets of mind opposing each other forever, but sets of mind which can be sublated in the end. The one-way theory of Li riding on a dynamic Ki explains the relation of mind and nature in terms of Li and Ki. In Youlgok's theory, Ki(mind) is the subject of operating dynamics and Li(nature) is the content of operated results. Nature appeared through operating mind is emotion. Li riding on a dynamic Ki means both that Li superintends Ki(operates Ki's standard), and that it realizes itself through Ki. In a word, mind is the subject realizing nature, and mind operates under the control of nature. In this way, Youlgok pays attention on both Li's norm and Ki's dynamic.

• The Journal of Korean Philosophical History
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• no.35
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• pp.7-42
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• 2012

The Ho-Rak controversy is an internal dispute in the Kiho School. Both Ho and Rak adopt the theories of Yulgok(栗谷) as their common standard of right arguments. The controversy continues almost two hundred years after the dispute between LEE Gan(李柬) and HAN Wonjin(韓元震). However, it does not develop rich theoretical resources. The fundamental issue of Ho-Rak controversy is how to define the relation of mind(心) and temper(氣質). Ho School regard temper as material of the mind, and so they insist that mind and temper are ultimately the same. But Rak School regard temper as desire of the body, and so they insist that mind and temper are the another one. The viewpoint of Rak School does not correspond to the view of the traditional Neo-confucianism. So we should understand that mind and temper are ultimately the same. However if we define that mind and temper are the same, and they act at the same time, then we can not insure the foundation of pure goodness in human mind. LEE Chulyoung(李喆榮) defines that mind and temper are ultimately the same, but they act alternately. It is the exact definition about the relation of mind and temper.

• The Journal of Korean Philosophical History
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• no.28
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• pp.297-329
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• 2010

This article is a preliminary essay for comparative study on Lao Zi Note of Park Sae Dang who lived Lee Dynasty in 17C and Hayashi La Zan who lived Doku Kawa Bakuhu in 17C. This article have two points at issue. First one is the their challenge that resisted the dogma of their own age. And the other one is their challenge of thaught had the academic background of the Lao Zi Note. They had a their own Lao Zi Note, Park Sae Dang朴世堂 had a New Note of Lao Zi 新註道德經 and Hayashi La Zan 林羅山 had a Selection Note of Lao Zi 老子抄解. However there are some different points between Park Sae Dang and Hayashi La Zan. The Hayashi La Zan's comprehension of Lao Zi followed in Lao Zi Note of Lin Xi Yi 林希逸 who had a point of Confucian comprehension of Lao Zi, so the study of Taoism of Hayashi La Zan excepted Zhuang zi. Hayashi La Zan concentrated on only Confucian comprehension of Lao Zi because Lin Xi Yi's Note of Zhuang Zi had a point of Zen Buddhism. However Park Sae Dang's the study of Taoism has Lao Zi and Zhuang Zi. He understood Lao Zi and Zhuang Zi in a base on Confucian comprehension. He indicated Confucian moral principle 修身治人 for a equal point of between Confucianism and Taoism. And he understood Cheng Xin成心 in Qiwulun in Zhuang Zi is similar to Xing性 of Xing Shan性善 in Meng Zi. Park Sae Dang analyzed not simply Lao Zi but also Zhuang Zi in a base on Confucian comprehension.