토양중 게르마늄 농도에 따른 벼의 생육 특성 및 게르마늄 흡수

이성태,이영한,최용조,이상대,이춘희,허종수 한국환경농학회 2005 한국환경농학회지 Vol.24 No.1

게르마늄의 약리효능이 알려짐에 따라 게르마늄이 깅화된 기능성 농산물의 요구도가 높아지는 추세이다. 본 연구는 게르마늄의 농업적 이용에 대한 기초 사료를 제공하고자 실시하였으며, 벼의 생육 및 게르마늄 흡수에 미치는 게르마늄처리 효과는 다음과 같다. 게르마늄을 0, 2.5, 5.0, 7.5 및 10.0 mg/kg으로 처리할 토양을 와그너포트에 넣어 벼를 재배힌 결과, 게르마늄 처리농도가 증가할수록 게르마늄 독성의 증가로 초장, 수장, 수수 및 수량이 급격히 감소하였으며 게르마늄 2.5 mg/kg 이상에서는 게르마늄 독성이 발생하였다. 게르마늄 처리농도가 증가할수록 벼의 게르마늄 흡수랑은 증가하였으나 벼의 게르마늄 이용율은 게르마늄 2.5, 5.0, 7.5 mg/kg 처리에서 각각 20.7, 12.5 및 7.5%로서 게르마늄 처리농도가 증가할수록 감소하였다. 벼의 부위별 게르마늄 함량은 볏짚>왕겨>현미 순으로 높았다. 게르마늄 2.5 mg/kg 처리시 볏짚, 왕겨 및 현미의 게르마늄 함량은 각각 103.4, 30.2 및 3.02 mg/kg 이었고, 볏짚과 왕겨에서는 게르마늄 무처리에서도 각각 2.9 및 3.9 mg/kg을 함유하고 있었다. 쌀의 아미노산 함량을 분석한 결과 게르마늄 처리농도가 증가할수록 Asx., Thr., Ser. 등 대부분 종류의 아미노산 함량이 증가하였으며, 그 결과 현미중 질소흡수량도 증가하였다. In order to obtain the basic information for agricultural utilization of Germanium(Ge), the growth characteristics and Ge absorption of rice plant were investigated with different Ge concentration in soil. Ge concentrations were treated with 0, 2.5, 5.0 7.5 and 10.0 mg/kg in pot(1/5,000a), respectively. As higher the Ge concentration in soil, the Ge absorption amount in straw, husk and brown rice were increased. But the yields were decreased with the increase of Ge phytotoxicity. When rice plant was grown more than 2.5 mg/kg Ge(as GeO₂) in the soil, growth was inhibited by germanium phytotoxicity and necrosis spots were observed in the rice leaf blades. Therefore the optimum concentration of Ge was less than 2.5 mg/kg in rice plant. When rice plant was cultivated on soil supplemented with 2.5 mg/kg Ge, Ge content in straw, husk and brown rice was 103.4, 30.2 and 3.02 mg/kg, respectively. The Ge content in plant was high in the order of straw > husk > brown rice. Most of the amino acids in rice were increased with the increase of Ge treatment, besides, total amino acid contents also increased.

光州川의 水質管理에 의한 榮山江水質의 改善效果

朴成天,李相俊 東新大學校 工業技術硏究所 1997 工業技術硏究 Vol.3 No.-

This paper purpose of presenting the improvable effect of the Youngsan River water quality according to management of the Kwangju Chun water quality. QUAL2E model, the estimate model of the water quality is used in this paper. The river length of study-basin is 60.0km in middle channel of the Youngsan River. The river length is divided into 60 elements, and those are divided into 6 reaches. This paper focused on the improvement effect of the Youngsan River-water- quality, with water quality management degree of the Gwangju Chun and clean water inflow degree of the Youngsan River. As a result of estimate, the Youngsan River BOD concentration-regression equations that were based on BOD concentration of the Gwangju Chun and inflow clean water of the Youngsan River considerating the Gwangju Chun BOD concentration.

전격성 경과를 취한 만성 호산구성 폐렴 환자 1예

윤호상,진춘조,유광하,이상엽,이수인,정상만,김선두,이순제,이길도,전혜정 건국대학교 의과학연구소 2000 건국의과학학술지 Vol.10 No.-

Chronic eosinophilic pneumonia(CEP) is a rare disease of unknown etiology characterized by chronic infiltration of the lung with eosinophils. It presents with profound systemic symptoms comprising fever, night sweats, weight loss, dyspnea and blood eosinophilia with nonsegmental air-space consolidation confined to the outer third of the lung, the "photographic negative of pulmonary edema". Histopathologic features of chronic eosinophilic pneumonia are intraalveolar and interstitial infiltrations with eosinophils, histiocytes, giant cells, scattered lymphocytes and plasma cells. Glucocorticoid therapy cause prompt resolution of symptoms as well as disappearans of blood eosinophils, elevated serum Ig E levels and the roentgenographic lesions. Infrequent radiographic findings include nodular infiltrates, consolidations, cavitations, atelectasis and pleural effusions. Deaths from CEP although rare, have been reported, but the majorities of CEP have benign courses and do not need a therapy with ventilator. We report a case of chronic eosinophilic pneumonia, which had a sudden course associated with diffuse pneumonic consolidations on the both lung and bilateral pleural effusion.

서울의 Penicillinase Producing Neisseria Gonorrhoeae 발생빈도(1996)

김재홍,황동규,전재홍,김윤석,김중환,김용준,이창균,임동진,김현수,조창근,김경문,박상훈,전우형,김희성,이호정,차명수,김갑형,김형석,김석우,황지환,박병순,권오상,이민수,송기훈,성소영,이인섭,부태성 대한화학요법학회 1999 대한화학요법학회지 Vol.17 No.2

Background : In recent years, gonorrhea has been panedemic and remains one of the most commom STDs in the world, especially in developing countries. Objective & Methods: For the detection of a more effective therapeutic regimen and assessing the prevalence of PPNG, we have been trying to study the patients who have visited the VD Clinic of Choong-Ku Public Health Center in Seoul since 1980 by means of the chromogenic cephalosporin method. Results: In 1996, 139 strains of N. gonorrhoeae were isolated, among which 53(39.0%) were PPNG. Conclusion: Our results suggests that after a peak of 74.3% in 1993, the prevalence of PPNG in Seoul is gradually declining.

저선량의 자외선 전처리가 자외선에 의하여 유발되는 염색체 이상과 자매염색문체교환에 미치는 영향

이천복,주성영 慶星大學校 1994 論文集 Vol.15 No.2

본 연구는 저선량의 자외선 전(前)처리가 자외선 후(後)처리에 의하여 유발되는 염색체 이상과 자매염색분체 교환에 미치는 적응반응에 대하여 연구할 목적으로 실시하였으며, 얻어진 결과는 다음과 같다. 1. 2 J/㎡의 자외선을 전처리하고 12∼48시간 경과 후 2 J/㎡의 자외선을 다시 처리하였을 경우의 염색체 이상율은 전처리하지 않은 군에 비하여 감소하였으며, 감소되는 정도는 24시간에서 최대를 보이다 이후 점차 낮아졌다. 2. 2 J/㎡의 자외선을 전처리하였을 경우에, 자외선을 전처리하지 않은 군에 비하여 염색체 이상율의 감소가 가장 많이 일어나는 후처리 선량은 10 J/㎡이었다. 3. 2 J/㎡의 자외선을 전처리하고 12∼48시간 경과 후 2 J/㎡의 자외선을 다시 처리하였을 경우의 자매염색분체 교환율은 전처리를 하지 않은 군에 비하여 감소하였으며, 감소되는 정도는 24시간에서 최대를 보이며, 이후에는 감소율에 별다른 차이를 보이지 않았다. 4. 2 J/㎡의 자외선을 전처리하였을 경우에, 자외선을 전처리하지 않은 군에 비하여 자매염색분체 교환율의 감소가 가장 많이 일어나는 후처리 선량은 20 J/㎡이었다. 이상의 결과는 세포에 저선량의 자외선을 전처리할 경우 이 세포가 다시 자외선에 노출되었을때 염색체 이상율과 자매염색분체 교환율이 낮게 나타나는 적응반응이 일어남을 보여주고 있다. 그러나 적응반응을 가장 많이 일으키는데 필요한 적응시간과 후처리 선량은 연구방법에 따라 차이가 있음을 보여주고 있다. This study was performed to research the adaptive response to chromosome aberration and sister chromatid exchanges which are caused by re-exposure to low-level doses' pre-exposure to UV light. The results obtained were as follows : 1. The frequency of chromosome aberrations in case of pre-exposure to 2 J/㎡ UV light for 12∼48 hours after re-exposure with it was less than that of the group without pre-exposure, and the degree of decrease was increasingly lessen at it's highest degree of 24th hour. 2. In case of the group pre-exposed to 2 J/㎡ UV light, the most reduction rate of chromosome aberrations occurred at the doses of re-exposure to 10 J/㎡, compared with the group without pre-exposure. 3. The frequency of sister chromatid exchanges in case of pre-exposure to 2 J/㎡ UV light for 12-48 hours after re-exposure to it was less than that of the group without pre-exposure, and the degree of decrease was highest at 24th hour after then little effected. 4. In case of the group pre-exposed to 2 J/㎡ UV light, the most reduction rate sister chromatid exchanges occurred at the doses of re-exposure to 20 J/㎡, compared with the group without pre-exposure. The preceding results show this : when the cell which is pre-exposed to low-level doses to UV light is re-exposed to the UV light, the adaptive response occurs that the frequencies of chromosome aberrations and sister chromatid exchanges are less. But the adaptive time and re-exposure doses which needed to cause the most adaptive response are different from each research method.

강우 - 유출모형에 의한 도시 하수망의 유출해석

이관수,박성천,이한민 대한상하수도학회 1994 상하수도학회지 Vol.9 No.1

The purpose of the study is to analysis runoff of urabn watersheds by the urban runoff model which can perform the channel flood routing, The urban runoff model used BRRL model and ILLUDAS model. The urabn watersheds selected Geuck-nak Chun Drainage Basin and Sang-Mu Drainage Basin. The two basin is located in Seo-Gu, Kwangju. To apply this model the basin is devided into contributing areas or subbasins. With this information, the time-area for contributing is derived. The rainfall pattern analysis on time distribution characteristics of rainfall rates is important in determination of design flow for hydrologic structures, particularly in urban area drainage network system design. The design rainfall assessed from the empirical formula of rainfall intensity and the temporal distributions of that rainfall determined on the basis of Huff’s method from the historical rainfall data of the basin. The urban runoff model tested in this study can be applied to compute the runoff in the urban stream channel as well as from the small urban drainage area.

40세 이하 관상동맥 질환자에서 장기적 임상 관찰

이승욱,정명호,박종철,박형욱,조상희,김원,김계훈,이상현,강경태,조장현,김남호,김건형,안영근,조정관,박종춘,강정채 全南大醫大 2001 전남의대학술지 Vol.37 No.2

Phenazine Methosulfate의 Superoxide Radical 生成作用에 미치는 光線의 影響

李民化,李起榮,梁誠烈,朴昞柱,全鉉權 全南大醫大 1985 전남의대학술지 Vol.22 No.4

PEG 분해균주의 분리와 PEG film의 상용성에 관한 연구

이제혁,정성제,이준열,전억한 경희대학교 부설 식량자원개발연구소 1993 硏究論文集 Vol.14 No.-

PEG를 sole carbon과 energy source로서 이용하는 미생물을 자연계에서 분리하였고, PEG의 분자량이 높아질수록 그 분해 미생물의 수가 감소하는 것을 확인하였다. 또한, liquid culture로서 PEG농도를 감소시키는 미생물을 선별하였고, 분해율은 PEG 8000이 약 18.8%였으며 PEG 10000은 약 25.4%인 것으로 조사되었다. PEG film의 제조를 위해 EMAA 및 EAA와의 상용성을 적외선 분광(IR) 스펙트럼을 사용하여 조사한 결과, EMAA와 EAA의 카르보닐기와 PEG의 에테르기와의 강한 수소결합이 형성으로 blend film제조시 상용성이 있는 것으로 확인되었다. Several strains capable of degrading PEGs(Polyethylene Glycols)were isolated and investigated for their biodgradation ability of PEGs. Microorganisms screened for the biodegradation studies were those grown on the PEG used as a sole carbon and energy source. It was known that the number of microorganisms decreased when grown on the high molecular weight of PEG(e.g. 20,000). A liquid culture was carried out with such microorgaisms and resulted in the decrease in PEG concentration meaning that PEG was degraded in the reactor. The biodegradability was found to be about 18.8% for PEG-8000 and 25.4% for PEG-10000, respectively. For the manufacture of biodegradable PEG film, EMAA/PEG and EAA/PEG blending ability was investigated with IR spectrum and showed that it was possible to produce blending film.

정전분무를 이용한 MOCVD에 의해 증착된 TiO_2 박막의 특성 연구

이영섭,박용균,이성재,조동율,천희곤 울산대학교 2002 공학연구논문집 Vol.33 No.1

정전분무(electrostatic spray)를 이용한 MOCVD방법은 원료를 함유하는 용액을 이용함으로써 이송관의 가열이 필요 없이 장치를 간단하게 할 수 있고, 용액의 유량과 전기장의 세기에 따라 초미세 입자제어도 가능하며, 출발 용액으로부터 박막의 조성을 조절할 수 있는 등의 여러 가지 특징을 가지고 있다. 온도가 증가함에 따라 입자성장과 반응가스에 의한 표면의 밀도가 감소하여 표면조도가 증가하였다. 증착 시간이 증가함에 따라 막의 두께는 증가하지만, 증착시간이 지날수록 +전하를 띤 액적들은 이미 생성된 막의 영향으로 -가 인가된 기판으로의 전하이동을 방해받으므로 island성장과 모세관현상의 표면형상은 거칠고, porous해졌다. 인가전압이 증가할수록 분무시 액적의 사이즈가 작아지므로 막의 표면은 치밀해졌으며, 표면에는 완전분무하지 못한 모액적에 의해 생긴 입자의 수도 적은 경향을 보였다. 산소 분말이 증가할수록 Ti와 O의 세기는 증가하나, C의 세기는 감소하는 경향을 보였다. The electrostatic spray assisted MOCVD has the advantages of simple apparatus without the gas lines, easy control of nano-sized droplets by applied voltage and solution rates and easy control of compositions of thin films by controlling the composition of starting solution. At lower deposition temperatures the morphology of the layers are less porous and rough. With increasing deposition time and thus increasing layer thickness the morphologies of the layers are shift to porous top layer with dense bottom layer and then porous top layer with big sized grain of bottom layer as the result of low growth rates. XPS can be seen that Ti and O intensity increases but C intensity decreses with increasing O_2 flow rates.