Protective Effects of N-acetylcystenine and Selenium against Doxorubicin Toxicity in Rats

Yeo-sung Yoon,Sun-don Kim,Min-hye Lee,Heung-shik S.Lee,In-se Lee,Je-kyung Sung,Eun-sung Park 대한수의학회 2003 Journal of Veterinary Science Vol.4 No.2

Effects of N-acetylcysteine and Selenium against Doxorubicin Toxicity in RatsEun-sung Park, Sun-don Kim1, Min-hye Lee, Heung-shik S. Lee, In-se Lee, Je-kyung Sung and Yeo-sung Yoon*

借用語의 音韻干涉에 관한 硏究

呂相弼 대구효성가톨릭대학교 1983 연구논문집 Vol.26 No.1

Working with some English loanwords in Korean, the writer has examined the principles of borrowing which has been proposed and demonstrated that each of the principles cannot account for the data adequately. The phonetic or phonemic approximation theory fails when there are members of the L_1 phonetic inventory identical to the L_2 sound in question and yet an entirely different substitution is made. The theory cannot explain the phenomenon that Korean speakers substitute the different sound /s/ or/t/ for the English interdental fricative /θ/. Hyman's frist principle must take precedence over his second one when there is conflict between them. His trird principle connot delimit the type of modification, because it allows more than one substitution for a segment. Ohoso's principle cannot account for the /w?/ sequence which is inadmissible underlying segments in the native syste, it cannot be analyzed by the glide deletion rule which constrains the underlying representation to obtain an admissible representation. The sequence can be explained adquately in terms of Hyman's third principle if the type of modification is clear. The palatalized velars are lexicalized and realized phonetically through the derivation prosess proposed by Ohso. As the glides /y/ and /w/ are deleted before the high front vowel /i/ and the back high bowel /u/ respectively in Korean by the application of the glide deletion rule, the sequency /yi/ and /wu/ are realized phonetically as /i/ and /u/ respectively. korean speakers cannot perceive the glides in such circumstances but they substitute /?/ for /?/ in the sequence /w?/ to get the admissible representation. And the epenthetic and paragogic vowels are /i/ which is so weak that it is easily devoiced between voiceless obstruents. The front high vowel /i/ is inserted as a paragogic vowel after the English palatals. The number of processes treated in this paper is very limited, and many of others are lift for further study.

共同海損의 成立要件에 관한 硏究

呂聖九 慶南大學校 産業經營硏究所 1991 産業經營 Vol.14 No.-

自然過程과 硬音化

呂相弼 대구효성가톨릭대학교 1985 연구논문집 Vol.31 No.1

The adequacy of criteria to make distinction between processes and rules proposed in nastural phonology are examined with reference to the fortition phenomena in Korean. Fortition of lenis obstruents should be classified as a process in that since the feature [+tense] is added to those of lenis obstruebts, the change is not a radical substitution but a minimal phonetic substitution. Stampe's another riterion of "no exception and many exceptions"tells us that the initial fortition and the post-sonorant to the latter in Korean. Therefore, the criterion of "no exception"is not adequate since it conficts with that of minimal phonetic substitution. It is more plausible to assume that since processes have the different degrees of productivity in the native phonological component, the productivity of processes is closely related to the nativization of loanwords. The analysis of English loanwords in Korean provides evidene for the assumption that the processes apply to the adaptation of foreign words according to their different degrees of productivity, contrary to Stampe's conception of phonological processes.

音節構造와 共鳴度

呂相弼 대구효성가톨릭대학교 1991 연구논문집 Vol.43 No.1

This paper argues trhat the non-linear approach is preferable to the linear approach to the internal structure of English syllables. Under the latter view, held by natural generatice phonologists, the syllable can be formally and universally defined by a rule which inserts the syllable boundaries between wequences of segments. The former view is that the syllable has a hierarchical internal structure, the major constituents of which are the onset and the rhyme. Various arguments for the onset-rhyme branching are adduced from strees assignment rules, speech errors, word games, influence of the following consonant upon the length of the prerceding vowel, and more frequent coocurrence constraints between neucleus and coda. This study presents the sonority degree theory of conditions on terminal positions of the English syllable template, arguing that it properly characterizes the natural classes of segments that can be associated with the postions of the onset and the rhyme constituents.

초등학교 학생·예비 교사·현직 교사의 실험 기구 명칭과 용도에 대한 이해

여상인,이병문 한국초등과학교육학회 2004 초등과학교육 Vol.23 No.1

This study was based upon the survey on the name of 13 basic experimental instruments used in elementary science class: Schale, evaporating dish, mortar & pestle, beaker, erlenmeyer flask, spuit(medicine dropper), graduated cylinder, balance, spatula, dropping bottle, gas collecting bottle, funnel, alcohol burner, and their uses. To implement this study, an open-ended, written questionnaire was administered to the subjects of in-service elementary school teachers, future elementary teachers who have attended at the Gyeongin national university of education, and elementary students in Korea. The findings of this study were as follows: The rates of in-service and pre-service elementary school teachers that knew correct name of experimental instruments were not high, the elementary school student's rates were especially very low. In this study, we found several reasons which they wrote inaccurately: the name to be represented at the textbook that they had studied, the confusion of the name about a fortis pronunciation, the recognition as the vocabulary like flask and cylinder to be meaningless, the habit to say in an everyday life, wrong expression in the internet and general book. All respondents had a wide range of perceptions of uses for the experimental instruments. Their understanding of uses for evaporating dish, erlenmeyer flask, balance, gas collecting bottle were very poor. And then most of them understood that graduated cylinder, beaker, and erlenmeyer flask were tools to measure the volume of solution or liquid, so they did not exactly distinguish the difference of their uses.

공동해손제도 운영상의 문제에 관한 연구

여성구 慶南大學校 産業經營硏究所 1999 産業經營 Vol.24 No.-

탈지대두박에서의 Isoflavone의 분리를 위한 흡착제의 조건

여경은,조성빈,김우정 한국산업식품공학회 2003 산업 식품공학 Vol.7 No.4

탈지대두박을 이용한 isoflavone의 분리 및 정제를 위한 최적 조건을 찾고자 absorption resin인 Amberlite XAD-1180를 사용하여 흡착제의 활성화용매의 농도, 흡착된 isoflavone의 용출용매의 농도, 용출용매의 양과 용출속도, 시료와 흡착제의 비율 그리고 수지에 미치는 pH와 ion의 영향을 조사하였다. 수지의 활성화와 용출에는 Amberlite XAD-1180의 경우 methanol 75%로 활성화시키기 ethanol 80%로 용출시키는 경우가 가장 높은 값을 보였으며, 이때 사용하는 absorption resin은 isoflavone 흡착을 위해 사용한 단백질제거 탈지대두박용액양의 약 0.5배로, ethatnol의 양은 단백질제거 탈지대두박용액 양의 4배를 사용하여 flow rate 12mL/min의 경우가 적절한 조건임이 밝혀져 흡착제 사용이 isoflavone 함량을 최고 2~3배까지 향상시키는 결과를 보였다. 이때 분리된 isoflavone의 순도는 최고 40%까지 얻을 수 있었다. pH와 ion의 영향에서는 pH는 5.0,NaCl은 0.25N 이하에서 isoflavone의 유출량이 높았다. Conditions for sorption and elution of isoflavone with using amberlite XAD-1180 were studied to separate Isoflavone from defatted soybean flour (DSF). Isoflavone analyzed were daidzin, genistin, glycitin, daidzein, genistein and glycitein by HPLC. The result showed that washing Amberlite XAD-1180 with 75% methanol and then elution of isoflavone with 80% ethanol resulted the highest amounts of isoflavone recovered from the absorption resin. The most proper eluent factor was 4(eluent/sample volume), the sample factor was about 2(the volum of sample/the weight of resin) ad flow rate 12 mL/min. The pH 5.0 and less than 0.25 N NaCl were found to be proper for seperation of isoflavone. The isoflavone contents after seperation with absorption resin were about 40% in dry weight basis.

상악골에 발생한 악성섬유성조직구종의 치험례

이상철,김여갑,류동목,이백수,윤옥병,신민철 大韓顎顔面成形再建外科學會 1998 Maxillofacial Plastic Reconstructive Surgery Vol.20 No.1

野生담배(Nicotiana glauca) Callus의 生長과 葉綠素形成에 미치는 Pnytohormone, Sucrose 및 光度의 影響

呂邑東,蘇祥燮,金必榮 全北大學校 基礎科學硏究所 1989 基礎科學 Vol.12 No.1

To establish a basis of a photoautotrophic culture, effects of phytohormones, sucrose, and light intensity on growth and chlorophyll foundation of callus were investigated. The callus was induced from the leaf explants of a wild tobacco(Nicotiana glauca Graham) on the MS medium supplemented with 1.0 ㎎/ℓof 2,4-D. Growth of them was arrived at logistic phase for 16 days of culsure which exhibited growth rate of 187.5 mg per day, and arrived at early stationary phase for 28 days. Both NAA in auxins and kinetin in cytokinins known to be effective chlorophyll formation were used as phytohormone. Callus growth and chlorphyll formation were the most effective at the combination of 0.1 ㎎/ℓof NAA and 1.0 ㎎/ℓof kinetin. And chlorophyll a/b was increased according to the increase of the concentration of kinetin. Callus growth was enhanced according to the increase of the concentration of sucrose in the cases supplemented with 0.0, 0.5, 1.0, 2.0 % sucrose respectively to the above medium, but did not make a difference in the cases supplemented with 3.0% and 4.0% sucrose respectively to it. However, chlorophyll formation was not affected by the sucrose concentration in the medium but associated with growth rates of callus in media with various sucrose levels(r=0.89**). On the other hand, the increase in light intensity from 2,000 through 5,000 to 10,000ux stimulated callus growth and chlorophyll formation. Chlorophyll a/b was also enhanced according to the increase of light intensity. However, soluble protein contents of callus were decreased according to growth phase of callus.