Changes of Sugar Composition and Related Enzyme Activities during Fruit Development of Asian Pear Cultivars ‘Niitaka’ and ‘Whangkeumbae’

Jin-Ho Choi,Jang-Jeon Choi,Chang-Seok Bang,Jung-Sup Lee,Dong-Woog Choi,Hye-Sun Cho,Jun Cheul Ahn 한국원예학회 2009 Horticulture, Environment, and Biotechnology Vol.50 No.6

We report on the seasonal changes of soluble sugar accumulation and several enzyme activities related to sugar metabolism, in two Asian pear cultivars (Pyrus pyrifolia) cultivars ‘Niitaka’ and ‘Whangkeumbae’. Soluble sugar content increased as the fruit developed and its total contents in matured fruits were 104.6 and 95.1 ㎎ㆍg?¹ fresh weight for ‘Niitaka’ and ‘Whangkeumbae’, respectively. However, the fructose-glucose-sucrose-sorbitol ratio was not significantly changed. Sorbitol-6-phosphate dehydrogenase activity was maintained at high level in leaves and low in fruits throughout the fruit development, although the enzyme activity highly fluctuated in young and mature fruits. NAD-dependent sorbitol dehydrogenase activity increased sigmoidally in both leaves and fruits during fruit development, and correlated with accumulation of total sugar in fruits. Sucrose synthase and sucrose phosphate synthase (SPS) activities remained low in leaves, but higher with two peak fluctuations in fruits. The change of soluble sugar contents positively correlated with SPS activity, based on the seasonal fluctuation of SPS activity and soluble sugar accumulation.

A Differential Current-to-Time Converter for ISFET Biosensors

Chang-Su Won,Won-Sup Chung 대한전자공학회 2009 ITC-CSCC :International Technical Conference on Ci Vol.2009 No.7

The differential current-to-time converter consists of a ramp voltage generator, an ISFET biosensor, a reference FET (REFET), two gain-adjustable current amplifiers, two current-tunable Schmitt triggers, and two logic gates. The design principle is to apply a ramp voltage to each input of the two current-tunable Schmitt triggers whose threshold voltages are proportional to the drain current values of the ISFET biosensors. A proposed circuit converts a current change in the ISFET biosensor into its equivalent pulse width change. A prototype circuit built using discrete components exhibit a conversion sensitivity amounting to 645.54 ㎲/pH s μ over pH variation range of 1-14 and a linearity error less than 0.001 %.

Wiener 空間에서의 强한 極限의 定理에 對한 小考

張鑄燮 漢陽大學校 基礎科學硏究所 1981 基礎科學論文集 Vol.1 No.-

R.H. Cameron과 W.T. Martin(1947)이 "Wiener 空間에서의 强한 極限의 定理"를 (0,1)의 分割을 Diadic 數列에 對하여 보였고, K.S. Chang(1980)은 이 定理를 이 Diadic 數列을 품는 좀 더 큰 數列에 對하여서도 成立함을 보였다. 本 論文에서는 R.iH. Cameron과 W.T. Martin이 使用한 數列과 K.S, Chang이 使用한 數列을 좀더 一般化시켰고, 이로부터 위 두 數列은 勿論 포함하고 如前히 Wiener 空間에서의 强한 極限의 定理를 滿足하는 一般化된 數列의 形態를 얻었다.

혼화재 및 폴리프로필렌섬유의 사용에 따른 콘크리트의 품질변화에 대한 기초적 연구

김정섭,손순채,조창호,최진석,김민국 朝鮮大學校 建設技術硏究所 2001 建設技術硏究 Vol.21 No.1

This study is to identify the effect of using admixture and polypropylene fiber on the quality of concrete. The results of the changes in the quality of concrete that has not yet hardened and concrete that has hardened is as follows: 1. Depending on the proportions of admixture, the greater the fly ash content and the lower slag and silica fume, the greater the slump. Admixture and polypropylene together contributed to increased slump. 2. The more fly ash, slag and silica fume added, the less the air. 3. After 360 days of age, greater fly ash content contributed to a lower compressive strength, while greater slag added to higher compressive strength. Silica fume shows a high compressive strength when 10% of silica fume was added on the 360th day of age. 4. Tensile Strength at 360 days of age, the less fly ash and the more slag, the higher the tensile strength. Silica fume at 360 days of age increase strength when the mixing proportion was 30%. 5. The more fly ash and the less slag and silica fume that were mixed, the greater the fire resistance. When added to and polypropylene fiber, the fire resistance of concrete of no effect. 6. The more fly ash and silica fume, the more carbonation shown and when there was only 10% slag present, the neutralization was also shown.

일제강점기 전후 신체와 미(美)에 대한 새로운 감수성의 출현

오창섭(Chang Sup Oh) 한국디자인문화학회 2011 한국디자인문화학회지 Vol.17 No.3

본 논문은 20세기 초엽 새롭게 형성된 몸에 대한 인식의 내용과 그 전개 과정을 고찰하는데 그 목적이 있다. 이를 위해 본 연구는 일제강점기에 간행된 잡지와 신문, 그리고 해당시기 사회상을 다루는 문헌을 대상으로 하여 비평적 서술의 방법을 통해 결론을 도출하고 있다. 당시 매체에는 서구적 미인에 대한 소개 기사가 끊임없이 등장하였다. 근대의 유입과 함께 새롭게 등장한 극장이나 미인대회와 같은 제도들은 매체와 더불어 아름다운 몸이 어떤 것인지에 대한 이해를 변화시켰다. 이러한 변화에는 일종의 전도가 자리한다. 하나의 대상이 아름답기 때문이 아니라 근대적이고 서구의 것이라는 이유로 아름답다고 인식되는 것이 바로 그것이다. 여기에는 근대는 서구이고, 그것은 좋은 것이라는 이해가 자리하고 있었다. 이러한 이해가 자리하는 공간에서 미의식은 근대와 밀접한 관계를 가질 수밖에 없다. 결국, 아름다움에 대한 인식의 변화는 근대적 가치의 확산과 서로 공명하면서 이 땅에 자리 잡게 되었다는 것을 알 수 있다. The object of this paper is to show how new ways of understanding of ‘body’ and ‘beauty’ had been emerged in Korea. For the purpose, magazines and newspapers that were published at the period of colonial rule by Japan is focused through critical narrative research methods. At that time, there were a lot of articles and images about western beauty in the newspapers and magazines. Especially, ‘beauty contests’ and ‘movies’ emerging with the influx of western culture helped to change traditional understanding about the body and beauty. But, a sort of reversal was located in this change. The reversal was that something beautiful was beautiful not because it was beautiful but because it came from modern or western society. There were understandings that ‘modern’ is ‘western’ and ‘western’ is ‘good’ in the reversal. These kinds of understandings are related to the modernity. As a result, the awareness of the beauty and body had been changed with the spread of modern values together.

인적자원개발기본법을 통한 효과적인 인적자원개발 전략

최창섭 대한교육법학회 2002 敎育 法學 硏究 Vol.14 No.2

What we call the present society 'the knowledge centered society' is because the knowledge centered information determines our survival. 'Knowledge centered society' means that the value of economic activities is changing from the form of a concrete resources to the form of a metaphysical resources. The metaphysical resources means the various formless information which human beings create. As these metaphysical resources directly connect with an economic value we can say that they lead a radical social changes. We need diverse human resources to adapt ourselves to a social changes and to create new information effectively and to utilize them. Under the existing uniform educational system, we have difficulty in training diverse human resources effectively. Therefore, it is a general tendency to make various policies, to establish related laws from necessity and to improve a social environment for the effective human resources development. At present, human resources development and training are becoming a competitive power for the national survival. In our country from 2000, we have supported the full-scale research and policy-making which are necessary for the human resources development. we established 'Basic Human Resources Development Act' in 2002. 'The Basic Human Resources Development Act' is the process of embodying the realistic human resources development plan through the improvement of a present educational environment. It is to make a legal basis for forming an effective political support system for the purpose of the effective human resources training and utilization. Various forms of verification need to make an effective human resource training system by 'Basic Human Resources Development Act'. We have to grope a concrete method to coincide in 'the Basic Human Resources Development Act' which was established with the object of human resources development.

흰쥐에 對한 Phosphamidon 및 Endosulfan의 亞急性毒性에 關한 硏究

申鎭燮,崔承允,李昌業,崔仁厚 서울大學校 農科大學 1984 서울대농학연구지 Vol.9 No.2

Subacute toxicity tests of phosphamidon and endosulfan were carried out to examine the adverse effects resulting from repeated daily oral administration of low dose levels (1, 2 and 5 mg/kg/day) to rats for 28 days. The results were summarized as follows: 1. Rats showed clinical signs of salivation hyperactivity, ataxia at 2mg/kg/day dosage of phosphamidon and, in addition, lachrymation, tremor, exophthalmus and diarrhea at the highest level. On the other hand, endosulfan caused only hyperactivity in rats treated with the highest dosage. There was no mortality at any dosage of either pesticide. 2. Rats gained significantly lower body weight, when treated at the 5mg/kg/day dose levels of phosphamidon and endosulfan, in comparison to normal, nontreated rats. 3. Plasma cholinesterase activity was significantly depressed at all levels of phosphamidon during the administration period, but returned to normal within 2 weeks after the last administration. Endosulfan did not change plasma cholinesterase activity at any levels. 4. Leukopenia was detected only in rats treated with phosphamidon at 5mg/kg/day level. No other adverse changes in hematology were observed in rats treated either with phosphamidon at lower levels or with endosulfan at any levels. 5. Cloudy swelling of liver was the only histological change in rats treated with phosphamidon or endosulfan at the highest level. No other histopathological change in rats treated with phosphamidon or endosulfan at the highest level. No other histopathological symptoms were found in spleen, heart, kidney, and bone marrow of rats treated. 6. It may be concluded from the results above that the "no effect level" is 1 mg/kg/day and 2 mg/kg/day for phosphamidon and endosulfan, respectively.

A Comparison Between Stroke Patients Admitted to Oriental Hospital in the Years 1987 and 1994

Lee Kyung-sup,Cho, Ki-ho,Kim, Young-suk,Ko, Chang-nam,Moon Sang-kwan,Bae Hyung-sup INSTITUTE OF ORIENTAL MEDICINE KYUNG-HEE UNIVERSIT 1998 JOURNAL OF ORIENTAL MEDICINE Vol.3 No.1

The characteristics of stroke slightly vary as time changes. To compare the characteristics of stroke between the 1980s and 1990s we investigated the clinical records of stroke patients in 1987 and 1994. The subjects of this study consisted of the 1971 patients who were admitted as stroke patients to the Kyunghee University Oriental Medicine Hospital during these two years. There were 1092 stroke patients admitted from May, 1987 to April, 1988 and 879 stroke patients admitted between May, 1994 and April, 1995. The results were as follows. The frequency of cerebral infarction was 77.9% in 1987 and 79.9% in 1994. The male to female ratio of stroke patients was 1.4:1 in 1987 and 1.6:1 in 1994. The occurrence rate of stroke in both 1987 and 1994 were highest in patients in their 60s, followed by those in their 50s, 70s and older, in their 40s, and finally their 30s and below. We especially found that the rate of patients in their 70s and over increased from 17.8% in 1987 to 25.3% in 1994, which was remarkable in cerebral infarction patients. The most common disease preceding a stroke was hypertension, followed by heart disease and diabetes in 1987, and in 1994 hypertension was the most common, followed by diabetes and heart disease. The rate of recurrence among cerebral hemorrhage, that was 12% in 1987 and 24.7% in 1994. The most frequent complications of stroke in 1987 and 1994 were pneumonia and urinary tract infection, respectively. The prescriptions used most frequently during admission were Chungpaesagan-tang followed by Sunghyangjungki-san, Yangyeksanhwa-tang etc. in both 1987 and 1994. When patients were getting better, prescriptions for invigorating Qi and enriching the blood(補氣血) were used more frequently. In conclusion, the most remarkable change of stroke patients from 1987 to 1994 was an increase in occupancy rate of aged patients, especially those in their 70s and older. So we suggest that more research are needed on the stroke of aged man, along with many other subjects on stroke.

수두증을 동반한 수모세포종에서 뇌척수액 단락술의 필요성에 대한 예후인자

김재건,정도섭,홍용길,안창호,박영섭,강준기 대한신경외과학회 1998 Journal of Korean neurosurgical society Vol.27 No.3

柔軟性에 의한 제조시스템의 評價 模型

하정진,이창섭,김성희 동아대학교 공과대학 부설 한국자원개발연구소 1993 硏究報告 Vol.17 No.2

Flexibility has become a key objectives in the design of manufacturing systems and a critical measure of total manufacturing performance. The need for flexibility is increasing due to some environmental change such a changing technical characteristics of the products and the changing nature of market demands. Most importantly, flexibility embodies competitive value for a manufacturer. Therefore, the objective of this research is to offer a definition of flexibility as well as proposing a scheme for assessing the value of flexibility, one of the performance measures of manufacturing systems.