Structural Characteristics of Cell Walls of Forage Grasses - Their Nutritional Evaluation for Ruminants - - Review -

Iiyama, Kenji,Tuyet Lam, Thi Bach Asian Australasian Association of Animal Productio 2001 Animal Bioscience Vol.14 No.6

The walls of all higher plants are organized as a cellulosic, fibrillar phase embedded in a matrix phase composed of non-cellulosic polysaccharides, some proteins and, in most secondary walls, lignin. At the effective utilization of plant biomass, qualitative and quantitative analyses of plant cell walls are essential. Structural features of individual components are being clarified using newly developed equipments and techniques. However, "empirical" procedures to elucidate plant cell walls, which are not due to scientific definition of components, are still applied in some fields. These procedures may give misunderstanding for the effective utilization of plant biomass. In addition, interesting the investigation of wall organization is moving towards not only qualitatively characterisation, but also quantitation of the associations between wall components. These involve polysaccharide-polysaccharide and polysaccharide-lignin cross-links. Investigation of the associations is being done in order to understand the chemical structure, organization and biosynthesis of the cell wall and physiology of the plants. Procedures for qualitative and quantitative analyses based on the definition of cell wall components are reviewed focussing in nutritional elucidation of forage grasses by ruminant microorganisms.

The Superoxide Dismutases are Required for Full Virulence of Pseudomonas aruginosa to the Silkworm, Bombyx mori

K. Iiyama,Y. Chieda,J. M. Lee,T. Kusakabe,C. Yasunaga-Aoki,S. Shimizu 한국응용곤충학회 2005 한국응용곤충학회 학술대회논문집 Vol.2005 No.05

Two Troubles in the North

Tomoyasu Iiyama 한양대학교 수행인문학연구소 2010 수행인문학 Vol.40 No.1

This paper examines discourses in the Civil Service Examinations during the Song-Ming period in southern China that justified the superiority of southerners to their northern counterparts and how this influences modern scholarship. “Why do northerners always fall behind in the Civil Service Examinations?” was a question endlessly asked with an obvious sense of superiority in southern China throughout the Late Imperial period. The core of the response almost always came back to the “environment” of the north: harsh winters, dry soils, arid climate, unruly Yellow River, and poor vegetation. In the eyes of southerners, these were the key reasons that made northern people dull, idle, and non-academic. In this way, Gu Yanwu, a dignified figure in Chinese intellectual history during Ming-Qing period, pointed out in his famous essay on the examination system that “the north has two misfortunes, one is the environment, and the other is the lack of talent.” Southerners lacked an understanding of northern China, however. Recent scholarship has revealed that northerners were not successful in the examinations in the Ming and Qing because they had focused on the Jurchen and Mongol recruiting systems in the Jin and Yuan. At this time, the examinations system did not play an important role in their lives. As such, in the north, there had never been a tradition of literati who eagerly sacrificed their lives to the examinations, as did their southern compatriots. In other words, there was another “Chinese society” in the North. As the southerners gained a dominant position in Chinese scholarship of Late Imperial China, their views became the legitimate explanation of the north-south difference. Modern scholars, including foreign academics, and even the descendants of northern literati themselves, have accepted this view. Thus, until recently, northern China has been deemed insignificant in the field of Chinese intellectual and social history. In order to obtain a better understanding of Chinese history and its social and cultural diversity, we need to not only research the history of northern China, but also examine why and when discourses of the north were formed. Doing so will help us understand the imagination that fostered the regional characteristics of China, and how the notion of environment played a central role in the process.

明治期 일본의 전문학교에 관한 연구(Ⅰ) : 관련 법령을 중심으로

이이야마 다케시 덕성여자대학교 고등교육연구소 1999 敎育硏究 Vol.7 No.-

It is known that there are two types of technical school; one is taking charge of professional education nowadays and the other was one of the type of schools which toot charge of higher education prewar, which were recognized as higher education institutes which existed until 19f95 in Japan. However, the theme which I would like to treat en this paper is about technical schools which existed in the Meiji era (1868-1912). There were two types of technical schools prewar; some were such schools which were established by social leaders or missionaries those days; the others were such schools which were established for the purpose of educating high school graduates by Meiji government. The technical schools which were studied on this paper during the period weir established since 1868. As prewar higher education institutes, the technical schools took charge of an important role before being permitted as universities or colleges formally. Thus, to study on this kind of school gives those who studies educational history deeper understanding about prewar Japanese higher education institutes. The researcher tried to approach the aspects of these kinds of prewar education institutes' the technical schools' through centering on studying educational laws.

전후 일본 고등교육기관의 개편과정에 관한 연구 : 미군정기(1945∼1952)를 중심으로

이이야마 다케시 덕성여자대학교 고등교육연구소 1998 敎育硏究 Vol.6 No.-

The purpose of this study is to understand the developmental process of post war Japanese higher education. The main content approach Is reformat process of postwar Japanese higher educational institutions such as universities, junior colleges, and graduate schools established postwar by the educational policy of C.I.E ; that was the educational section of G.H.Q that took charge of religion and education in Japan and Korea, which strong1y affected the postwar Japanese educational policies during the period In addition, the paper dealt with the characteristics and systems of Japanese higher education change while G.H.Q was staying in Japan from 1945 to 1952. The period which G.H.Q stayed in Japan was very important fer the understanding of the development of postwar Japanese educational aspects. Until now, the study concerned with the history of Japanese education has seemed to be considered less important in Korea than that of other countries in general. However, I am sure that one can understand the Korean postwar higher education in depth through research of the historical matters fulfilled during the period when G.H.Q governed Japan.

Development of Titanium-based Brazing Filler Metals with Low-melting-point

Onzawa, T.,Iiyama, T. The Korean Welding and Joining Society 2002 International journal of Korean welding society Vol.2 No.2

Titanium and titanium alloy are excellent in corrosion resistance and specific intensity, and also in the biocompatibility. On the other hand, the brazing is bonding method of which productivity and reliability are high, when the complicated and precise structure of the thin plate is constructed. However, though conventional titanium-based brazing filler metal was excellent in bond strength and corrosion resistance, it was disadvantageous that metal structure and mechanical property of the base metal deteriorated, since the brazing temperature ( about $1000^{\circ}C$ ) is considerably high. Authors developed new brazing filler metal which added Zr to Ti-Cu (-Ni) alloy which can be brazed at $900^{\circ}C$ or less about 15 years ago. In this paper, the development of more low-melting-point brazing filler metal was tried by the addition of the fourth elements such as Ni, Co, Cr for the Ti-Zr-Cu alloy. As a method for finding the low-melting-point composition, eutectic composition exploration method was used in order to reduce the experiment point. As the result, several kinds of new brazing filler metal such as 37.5Ti-37.5-Zr-25Cu alloy (melting point: $825^{\circ}C$) and 30Ti-43Zr-25Cu-2Cr alloy (melting point: $825^{\circ}C$) was developed. Then, the brazing joint showed the characteristics which were almost equal to the base metal from the result of obtaining metallic structure and strength of joint of brazing joint. However, the brazing filler metal composition of the melting point of $820^{\circ}C$ or less could not be found. Consequentially, it was clarified that the brazing filler metal developed in this study could be practically sufficiently used from results such as metal structure of brazing joint and tensile test of the joint.

Pathogenicity of gacA Mutant of Pseudomonas aeruginosa PAO1 in the Silkworm, Bombyx mori

Y. Chieda,K. Iiyama,J. M.Lee,T. Kusakabe,C. Yasunaga-Aoki,S. Shimizu 한국응용곤충학회 2005 한국응용곤충학회 학술대회논문집 Vol.2005 No.05

Identification and Characterization of the Bacterial Strains Isolated from the Antlions

I. Egami,K. Iiyama,C. Yasunaga-Aoki,S. Shimizu 한국응용곤충학회 2005 한국응용곤충학회 학술대회논문집 Vol.2005 No.05

Tourist Transition Model among Tourist Attractions based on GPS Trajectory

Kasahara, Hidekazu,Watabe, Takeshi,Iiyama, Masaaki Smart Tourism Research Center 2021 Journal of smart tourism Vol.1 No.2

Before COVID-19, tourist destinations have experienced problems with congestion of both famous tourist attractions and public transportation. Over-tourism is not an issue at this time, but it is likely to rekindle after the COVID-19 pandemic ends. One method of mitigating over-tourism is to estimate tourist behavior using a tourist transition model and consequently adjust public transportation operations. In this study, we propose a construction method for a model of tourist transitions among tourist attractions based on tourist GPS trajectory data. We construct tourist transition models using actual trajectory data for tourists staying in the vicinity of Kyoto City. The results verify the model performance.

Food Science ; Compositional Characterization Of Cacao (Theobroma Cacao L.) Hull

Byung Yeoup Chung,KenJi Iiyama,Kang Wan Han 한국응용생명화학회 2003 Journal of Applied Biological Chemistry (J. Appl. Vol.46 No.1

Chemical composition and structural characteristics of cacao (Theobroma cacao L.) hull were investigated. Holocellulose, Klason residue, total amino acid, lipid, ash, and glucose contents were 334, 320, 96, 99, 93, and 174 g·㎏^-1, respectively. Other neutr