• Journal of the Korean Society of Food Science and Nutrition
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• v.26 no.2
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• pp.344-350
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• 1997

The present study was carried out to investigate the effects of zinc and vitamin E on the antioxidative defense mechanism in the liver of streptozotocin(STZ)-induced diabetic rats. Levels of blood glucose of STZ-diabetic rats were higher than that of control, but ZDM($ZnSO_{4}$ 10mg/kg injection+STZ) group was lower than those of DM(STZ injection) and EDM(vitamin E 400mg/kg diet+STZ) group. Levels of plasma insulin were lower in all three STZ-diabetic groups than those of control. Thiobarbituric acid reactive substances(TBARS) peroxide values(LPO) in liver were increased 2.3-fold in DM group compared with those of control, while LPG in ZDM group was lower than that of DM group, and EDM group had similar tendency compared with that of control. Reduced glutathione(GSH) contents of liver were decreased in DM group compared with those of control, but increased 2.3, 1.7-fold in ZDM and EDM groups, respectively, compared with those of DM group. Oxidized glutathione(GSSG) was increased in DM group compared with control and GSSG in ZDM and EDM group were lower than that of DM group. GSH/GSSG ratio had similar tendency compared with results of GSH. The activities of free radical scavenging enzymes such as superoxide dismutase, glutathione peroxidase and glutathione S-transferase were significantly decreased in DM group compared to those of control, but higher in ZDM and EDM groups than those of DM group. The metallothionein contents in liver and kidney were increased in DM and EDM groups were remarkably increased 20, 5.3-fold in ZDM group, compared with those of control.

• The Mathematical Education
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• v.42 no.2
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• pp.247-258
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• 2003

In this study, total 486 articles in the journal of the Korea Society of Mathematical Education Series A are classified and analyzed by MSC2000 and ZDM classification. The results are as follows: 1) 2000 Mathematics Subject Classification : (number of articles) 1) 2000 Mathematics Subject Classification : (number of articles) 97- : (31), 97A : (7), 97B : (40), 97D : (229), 97U(105) 2) ZDM classification : (number of articles) A : (36), B (45), C : (57), D : (145), E : (19), F : (27), G : (37) H : (7), I : (19), K : (18), M (4), N : (12), U : (60) 3) Some remarks and suggestions are proposed.

• Journal for History of Mathematics
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• v.17 no.4
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• pp.65-76
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• 2004

Even though mathematics and music play very different roles in our society, they are closely related to each other. In this paper, we studies relations between mathematics and Korean traditional music, and give some ideas to use such relations in mathematics education.

• Journal for History of Mathematics
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• v.17 no.4
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• pp.17-26
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• 2004

This paper claims that an essential characteristic of modernism is mathematization, and introduces how mathematization was deployed in the eighteenth century. It also points out problems caused by mathematization.

• Journal for History of Mathematics
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• v.18 no.1
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• pp.103-110
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• 2005

This paper is aimed at studying a historical background of graph theory and we deal with the computer representation of graph through a simple example. Graph is represented by adjacency matrix, edge table, adjacency lists and we study the matrix representation by Euler circuit. The effect of the matrix representation by Euler circuit economize the storage capacity of computer. The economy of a storage capacity has meaning on a mobile system.

• Journal for History of Mathematics
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• v.17 no.3
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• pp.13-22
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• 2004

In this paper, we consider two conjectures, the Bieberbach Conjecture that was proved true and the Lu Qi-Keng Conjecture that was proved not true. We inspect them historically and introduce the interesting results. From them we find that the deep theory of mathematics comes from continuous conjectures.

• Journal for History of Mathematics
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• v.17 no.3
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• pp.93-108
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• 2004

In this article we study on various proofs of the Steiner-Lehmus theorem(any triangle that has two equal angle bisectors is isosceles). We suggest 6 geometric proofs and 3 algebraic proofs of the theorem in detail, analyze these proofs, extract related theorems, proof ideas.

• Journal for History of Mathematics
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• v.17 no.3
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• pp.43-60
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• 2004

The aims of the study were to analyze the San-Sul-Kwa textbook under the rule of Japanese Imperialism(1909～1945). It was analyzed that the contents of San-Sul-Kwa were selected for the purpose of national interests of Japanese as a ruling country through four times of amendment of education and many kinds of drill and practice in terms of number and operations were emphasized toward entire grades. However, some parts of textbook over the period seem to have had significant affects on mathematics education of Korea since the period.

• Journal for History of Mathematics
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• v.17 no.3
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• pp.23-32
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• 2004

In this paper, Ive investigated algebraic concepts which are contained in Euclid's Elements. In the Books II, V, and VII∼X of Elements, there are concepts of quadratic equation, ratio, irrational numbers, and so on. We also analyzed them for mathematical meaning with modem symbols and terms. From this, we can find the essence of the genesis of algebra, and the implications for students' mathematization through the experience of the situation where mathematics was made at first.

• Journal for History of Mathematics
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• v.17 no.3
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• pp.73-92
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• 2004

The paper surveys various attempts to use the concept of 'fundamental ideas' -Bruner's concept- as a tool for organizing mathematics teaching and research in mathematics education. One of the characteristics of fundamental ideas in mathematics is their correspondence to the history of mathematics; therefore in forming out contents and methods in mathematics education, the history of mathematics may be serve as an interesting aspect. It is demonstrated by the example of mean values.