딸기 ‘설향’ 육묘 시 모주의 묘소질과 정식 시기가 런너와 자묘의 생육에 미치는 영향

김대영, 김수, 최학순, 이선이, 허윤찬, 정승룡 忠北大學校 農業科學硏究所 2014 農業科學硏究 Vol.30 No.2

This study was conducted to investigate the effect of plantlet quality and transplanting time of mother plants on the growth of runner and daughter plants of strawberry (Fragaria×ananassa) ‘Seolhyang’ during nursery. Plantlet quality of mother plants is expected to be able to distinguish on the basis of crown diameter because crown diameter was highly correlated with fresh weight(r = 0.85), leaf area(r = 0.81), root weight(r = 0.75) and 1st primary roots(r = 0.73). Mother plants were transplanted based on the crown diameter (7~9 mm, 9~11 mm, 11~13 mm and 13~15 mm) in 15 March, 2012. Also, mother plants were transplanted in 15 March, 30 March, 15 April, 30 April and 15 May to investigate the best transplanting date. As a result, the number of daughter plants in the treatment 9~11 mm and 11~13 mm were 22.7 and 22.4 respectively at the end of July. But the number of daughter plants in the treatment of 7~9 mm and 13~15 mm reduced 26% and 16% respectively compared to the average number of the daughter plants in the treatment between 9 mm and 13 mm. The number of daughter plants in the treatment of 15 March, 15 April and 15 May were 20.2, 18.8 and 13.2 respectively at the end of July. Early time of transplanting was able to obtain the more daughter plants and improve the plantlet quality of daughter plants. Therefore, mother plants having crown diameter between 9 mm and 13 mm recommended to be transplanted until the end of March to obtain sufficient daughter plants and improve plantlet quality of daughter plants for producing strawberry fruits.

방선균 분리주가 생산하는 Phospholipase C 저해물질인 MT2617-2B의 분리 및 특성

고학룡,이현선,오원근,안순철,김보연,강대욱,민태익,안종석 한국미생물생명공학회 ( 구 한국산업미생물학회 ) 1996 한국미생물·생명공학회지 Vol.24 No.1

방선균 분리주 MT2617-2의 배양액으로 부터 phospholipase C (PLC) 저해물질인 MT2617-2B를 n-butanol 추출 및 column chromatography 법을 이용하여 분리하였다. MT2617-2B는 IR ^13C- 및 ^1H-NMR 그리고 ESI-MS에 의한 구조분석 결과, 한 개의 hemiketal ring, polyhydroxyl 및polymethyl groups으로 구성되었으며 side chain으로 한 개씩의 malonate 및 guanidine group을 가지는 분자량 1057의 macrolide 화합물이었다. 따라서, MT2617-2B를 기존의 macrolide 항생제인 copiamycin 및 niphithricin A로 동정하였다. 한편, MT2617-2B는 methanol 용액에서 실온에서 방치하였을 때 도일한 분자량을 가진 두 개의 이성질체를 생성하였다. PLC γ1과 -β1에 대해 각각 25 및 50㎍/㎖의 IC_50 값을 가지며, Staphylococcus aureus 와 Candida albicans에 대해서는 항균활성을 나타내지만 Escherichia coli에는 나타내지 않았다. A phospholipase C (PLC) inhibitor (MT2617-2B) was isolated from the culture broth of actionmycetes isolate MT2617-2 by the extraction with n-butanol and column chromatographic techniques. The molecular weight of the inhibitor was 1057, by the spectroscopic analyses of IR ^13C- and ^1H-NMR and ESI-MS. The chemical structure of MT2617-2B was found to be a macrolide compound consisted of a hemiketal ring, polyhydroxyl and polymethyl groups, which had a malonate and guanidine group as its side chain. MT2617-2B produced its two isomers having the same molecular weight by standing in methanol solution at room temperature. Therefore, MT2617-2B was identified as copiamycin and niphithricin A, macrolide antibiotics. The values of IC_50 against PLC γ1 and PLC-β1 were 25 and 50㎍/㎖, respectively. MT2617-2B had antimicrobial activities against Staphylococcus aureus and Candida albicans, but not against Escherichia coli.

하이퍼미디어 자료의 효율성 : 사용자의 인식에 영향을 미치는 하이퍼링크와 노드에 관한 연구

김대룡 울산대학교 2000 경영학연구논문집 Vol.7 No.2

하이퍼미디어 자료를 이용한 교육훈련이 다른 자료의 이용보다 효율적이란 연구는 많이 되어 왔으나 하이퍼미디어 자료의 효율적인 구성에 관한 연구는 미진한 실정이다. 이에 이 연구는 하이퍼미디어의 기본 구성요소인 하이퍼링크와 노드를 처리변수로 하고 사용자의 편의성과 유용성에 대한 인식을 종속변수로 하여 하이퍼링크의 숫자와 노드의 크기가 사용자의 하이퍼미디어 자료에 대한 유용성과 편의성 인식에 어떻게 영향을 미치는지에 대해 밝히고자 했다. 먼저 2×3 팩토리얼 디자인에 따라 각각 다른 처리변수의 조합을 가진 6개의 하이퍼미디어 자료가 구축이 되었으며 경영대 학생들을 대상으로 실험을 하여 자료를 수집했다. 수집된 자료는 타당성 검사와 신뢰성 검사를 거친 뒤 통계적 분석을 하였다. 종속변수에 대한 상관관계가 검사되었으므로 다변량 분산분석으로 처리변수의 종속변수에 대한 통계적 유의성을 검사했으며 단변량 분산분석 중 이원배치분산분석으로 각각의 종속변수에 대한 처리변수의 영향을 검토했다. 인구통계학적 자료의 종속변수에 대한 상관관계가 발견됨에 따라 다변량 공분산분석과 단변량 공분산분석을 통해 인구통계학적 자료의 영향을 조사했다. 마지막으로 평균차이 분석을 통해 실험 참가자들의 선호도를 조사했다. 본 연구의 결과를 요약하면 처리변수는 사용자 인식 편의성과 인식 유용성에 영향을 미치고 하이퍼링크 수와 노드 크기가 하이퍼미디어의 설계에 중요한 요인인 것이 밝혀졌다. Many researches have been done to see if hypermedia training material is much more effective than the traditional training material. Only a few studies, however, on how to design effective hypermedia material have been performed so far. So this study would like to show the implications of the number of hyperlink and the size of node on the users' perceived usefulness and perceived easy of use on hypermedia training material. Six hypermedia training materials developed by 2×3 factorial design which has 6 combinations of each treatment level were used for experiments for the study After checking out the validity and reliability by factor analysis and Cronbach's alpha coefficients, statistical analysis has been done to test hypotheses of the study Multivariate analysis of variance (MANOVA) test was first done, because correlations among the survey items were found, and then univariate analysis of variance (Univariate ANOVA) test were performed to figure out the implications of treatment variables on a dependent variable. Multivariate analysis of co-variance (MANCOVA) and analysis of co-variance (ANCOVA) were tested, because the correlations between demographic data and one of dependent variables were found. Finally, experiment participants' preference was figured out by using the difference analysis of average. The result of the study showed the impotance of the basic components, hyperlink and node, of hypermedia training material for more efficient design.

강자성체에서 상전이의 수치적 모의실험

유대영,양해정,양회룡,정진,최승평,장차익 조선대학교 기초과학연구소 2001 自然科學硏究 Vol.24 No.-

It is difficult to explain the magnetic phase transition with classical physics in Curie temperature. We studied qualitatively with the well known Ising model in statistical mechanics. We simulated systems of finite size by Monte Carlo methods with Metropolis algorithm. Thus we could estimate the values of quantities such as the magnetization(m) per spin the specific heat(c) per spin the magnetic susceptibility(χ) per spin, and the mean energy per spin compare with the numerical values in infinitive size. The quantities of c, m, χ, e varied rapidly within 2.3∼2.4 temperature at J/k units. Those values show that the critical temperature can be within the range. The hysteresis loop was obtained with this model.

經營情報價値理論에 관한 硏究 : 會計情報를 中心으로 Mainly on the Accounting Information

黃大錫,朴泳龍 건국대학교 1978 樂圓誌 Vol.13 No.1

The economical value of accounting information should be increased in order to contribute to this society as a useful instrument. But the interesting groups of a firm which are benefitted by the accounting are numerous and their interests to a firm are various as many as their number, so this becomes problem that how the accounting can suffice effectively their various needs. As the information which can he provided by the single form of Balance sheet and Statement of Profit & Loss is limited, the fulfillment of the interesting group's demands for the information cannot be expected. Therefore, the view is strongly risen that we should take into consideration impartially every man and every group which hag interest with a firm in making the accounting report for the general purpose. In this thesis, the possible directions was searched to increase the accounting effectiveness as an information system by analyzing the character of the accounting measurement system through study on the nature of accounting information value from the view point of management information theory.

MmNi_5(Mm=mischmetal)의 수소화 특성에 미치는 Fe, Cu 및 Al의 영향

김대룡 경북대학교 공과대학 1987 工大硏究誌 Vol.16 No.-

A study was made on the influence of substitution of metal elements affecting hydrogen absorption and desorption charateristics of MmNi_5 (Mm=mischemtal). By the substitution of Fe, Cu and Al for a part of Ni in MmNi_5, equilibrium hydrogen pressure and hysteresis energy for hydriding and dehydriding reactions were decreased and maximum hydrogen absorption capacities diminshed slightly. A relative stability of the hydrides was increased with increasing cell volume of the intermetallics by the substitutions. Thermodynamic data of the hydrides were obtained from the pressure-composition isotherms. During the absorption and desorption cycles by thermal cycling, hydrogen storage properties of MmNi_5 type intermetallic compounds were degradated due to microphase separation. But, in MmNi_4Fe_0.85Cu_0.15, degradation was less than other MmNi_5 type intermetallics.

鹽水溶液에서 스테인레스鋼의 孔蝕에 미치는 添加劑의 영향

崔丙鎭,金大龍,尹秉河 경북대학교 공과대학 1986 工大硏究誌 Vol.15 No.-

A statistic method was employed through galvano-static experiments in this study of pitting corrosion of SUS 430 stainless steel. When ethylen-diamine (NH_2-CH_2-CH_2-HN_2) as an inhibitor and ferric chloride(FeCl_3) as an aggressive agent are added to corrosive medium, those additives affect on the size, distribution and total number of pits formed. Which can be explained by means of potential barriers at the moment of pits' nucleation. And the largest pit, appeared as a peak in the pits' distribution curve, occupied the majority part of total pits' volume.

效率的인 團地計劃을 위한 自治行政區域의 廣域化 方案

오창수,박대룡 광주대학교 1999 産業技術硏究 Vol.13 No.-

본 연구에서는 토지의 이용도를 높이기 위한 단지계획을 효율적으로 시행하기 위해 광주·전남권을 중심으로 단지개발 현황을 분석하고, 그 결과를 토대로 인구와 면적을 고려하여 광주·전남지역의 자치단체 행정구역을 6개의 광역도시권으로 광역화함으로서 도시 및 지역계획제도에 관한 정책적, 이론적 발전에 기여하고자 한다. 지방자치시대에 알맞은 단위행정구역의 범위를 광역화하여 토지 이용율을 높이고, 정보화시대에 적응할 수 있는 자치행정구역을 광역도시권으로 조정함으로서 행정의 능률화를 기할 수 있으며, 자연관광자원을 연결하는 순환도로에 세계의 유명한 교량을 시설함으로서 교량백화점을 건설하여 각광받는 관광상품으로 육성하는 방안을 제언한다. In this study the site development method for the site plan in Kwangju and Chonnam is analysised, and the main result is that the self-governing administration in Kwangju and Chonnam is devided by 6 metropolitan city region. Subsequent results are Site planning which extends metropolitan region can improved the land use ratio. The population extent of the self-governing administration which can be efficiently adapted for Information Age is 200,000 or more inhabitants. This extent can save the resources. The circular road for connecting tourism resource of nature which includes the bridge department store can be a good tourism item.

형광검출 역상 액체크로마토그래피에 의한 Histamine의 정량

유희춘,김형룡,김상현,김대기,이영미,김형민,안년형,신태용 우석대학교 의약품개발연구소 1996 藥學硏究誌 Vol.1 No.-

Histamine을 정확하고 신속하게 정량하기 위해 9.Fiuorenylmethyl chloroformate를 형광유도체화제로 하여 역상 HPLC법으로 정량하였다. 히스타민을 형광유도체화할 때 반응액의 pH, 반응시간, 형광유도체화제의 농도 등 최적 반응 조건을 검토하였다. 이 방법으로 히스타민을 분석한 결과 0.1~0.5ug/ml의 농도범위에서 상관계수가 0.922인 양호한 직선성을 나타내었으며 검출한계는 0.01??/ml였다. A rapid and simple method for the determination of histamine by reverse-phase high performance liquid chromatography with fluorescence detection was established. 9-Fluorenylmethyl chloroformate(FMOC) was used as fluorescent derivative reagent. The optimum conditions for the derivatiation such as pH, reaction time and he concentration of FMOC were investigated. Linearity of calibration curve was obtained between 0.1ug/ml/and 0.5ug/ml(r=0.922) and the limit of detection was 0.01ug/ml.

생체적합성과 생분해성을 갖는 Polypeptide Copolymers의 합성과 물성에 관한 연구(Ⅲ): Polypeptide Hydrogels의 약물조절방출

강인규,권대룡,성용길 동국대학교 자연과학연구소 1991 자연과학연구 논문집 Vol.11 No.-

Poly(γ-benzyl L-glutamate) (PBLG)의 측쇄에 polyethylene glycol(PEG) 또는 ethanolamie(EA)을 반응시켜 적심성이 서로 다른 몇가지 폴리펩티드 공중합체를 합성하였고, 이들 공중함체의 약물방출특성을 살펴보았다. 합성된 폴리펩티드공중합체의 수분흡수율은 공중합체 중의 PEG 또는 EA 함량이 높아짐에 따라 증가하였다. PEG-PBLG-EA 공중합체로부터의 5-fluorouracil의 방출속도는 PEG-PBLG 공중합체로부터의 방출속도보다 크게 나타났으며, 이러한 결과는 팽윤성의 폴리펩티드를 합성하고자 할 때 사용되는 치환제로서는 PEG보다도 EA가 더욱 효과적이라는 것이 나타났다. 한편, PEG를 가교시킨 PBLG 공중합체막상에서는 5-fluorouracil의 방출에 기인하여 작은 pores를 명료하게 나타나고 있음을 알 수 있었다. Several copolypeptides having different swellabilities are are synthesized by introducing polyethylene glycol(PEG) or ethanolamine(EA) to the side chains of poly(γ-benzyl L-glutamate) (PBLG) and their drug release characteristics are examined. The degree of swelling of copolypeptide is increased by increasing PEG or EA content in the polymer. The release rate of 5-fluorouracil from the PEG-PBLG-EA copolymers was higher than that of the PEG-PBLG copolymers. This results indicated that EA is more effective than PEG for the preparation of the swellable polypeptides. It was observed, from the morphological study by scanning electron microscope, the pores are generated on the PEG-crosslinked PBLG, but not on the PEG-grafted-PBLG.