답토양(畓土壤)에서 Strontium-90의 탈착(脫着)에 관(關)한 연구(硏究)

김재성,임수길,이영일,정규회,Kim, Jae-Sung,Lim, Soo-Kil,Lee, Young-Il,Cheong, Kyu-Hoi 한국환경농학회 1987 한국환경농학회지 Vol.6 No.2

방사성핵종중(放射性核種中) 식물(植物) 흡수율(吸收率)이 높은 $Sr^{90}$을 5개 답토양(畓土壤)에 처리(處理)하여 흡착(吸着)시킨 후 $Sr^{90}$ 탈착(脫着)에 대한 답토양(畓土壤)의 이(理)${\cdot}$화학적(化學的) 성질(性質)의 영향(影響)과 토양내(土壤內)에서의 형태별(形態別) 분포상태(分布狀態)을 조사(調査)하여 다음과 같은 결과(結果)를 얻었다. 1. 답토양(畓土壤)에 흡착(吸着)시킬 $Sr^{90}$의 대부분은 치환성(置換性)과 수용성(水溶性)이었고 특히 치환성함량(置換性含量)이 매우 높았고 그 량(量)은 $Sr^{90}$처리량(處理量)과 정비례적(正比例的)으로 증가(增加)하였으나 이에 반하여 Ca처리(處理)에 의해서는 감소(減少)되었다. 2. 답토양(畓土壤)에서의 $Sr^{90}$ 존재형태(存在形態)는 토양통(土壤統)에 따라서 차이가 있으나 평균적으로 치환성(置換性)이 59.3%, 수용성(水溶性)이 28.6%, 비치환성(非置換性)이 12.6%로 나타났다. 3. 비치환성형태(非置換性形態)로 전환되는 $Sr^{90}$량(量)은 Illite함량(含量)이 높고 Vermiculite함량(含量)이 적은 토양(土壤)에서 높았다. 4. 토양(土壤)에 흡착(吸着)된 $Sr^{90}$의 형태중(形態中) 수용성(水溶性)과 치환성(置換性) $Sr^{90}$의 탈착량(脫着量)은 토양(土壤) pH 와 치환성염기(置換性鹽基) 함량(含量)의 증가(增加)에 따라 감소(減少)하였고 유기물(有機物)과 점토함량(粘土含量)의 증가(增加)에 따라서는 증가(增加)하였다. The present study was carried out to determine the effect of the physical, chemical and mineralogical properties of paddy soil on the adsorption and desorption of $Sr^{90}$ from absorbed soils. The results obtained were as follows: 1. Most of the adsorbed $Sr^{90}$ was exchangeable and water soluble. $Sr^{90}$ extracted by ammonium acetate was very high compared to the water soluble fractions, and the ammount decreased with the increase of calcium application, but increased proportionally with the increase of $Sr^{90}$ treatment. 2. The distribution of $Sr^{90}$ in paddy soil depend on the soil type. Average-distribution rates of water soluble, exchangeable and non-exchangeable fractions of $Sr^{90}$ in the soils were 28.6%, 59.3% and 12.1% respectively. 3. The non-exchangeable from of $Sr^{90}$ was high in the soils of high illite and low vermiculite content. 4. The desorption of $Sr^{90}$ from adsorbed soils decreased with the increase of pH and ex-cations of the soils, but increased with the amount of organic matter and clay content in the soil.

벼의 방사선 감수성에 미치는 양분 결핍의 영향

김재성,신인철,이영근,이규승 ( Jae Sung Kim,In Chul Shin,Young Keun Lee,Kyu Seung Lee ) 한국환경농학회 1997 한국환경농학회지 Vol.16 No.3

Thirty day old rice seedlings, Ilpoom and Taeback variety, grown under deficient condition of several elements in nutrition solution of sand culture were exposed to 20Gy, 40Gy, 80Gy of gamma ray (^(60)Co) to study the effect of their radiosensitivity. The results obtained are summarized as follows : Plant height and fresh weight of nutrient deficient rice plants were far less than those of control. The effect was different with nutrient element and rice variety, as show increasing effect of radiosensitivity in the Ilpoom variety was high in the Fe deficient whereas that of Taeback was high in the P deficient. Growth inhibition of rice plant irradiated with 20Gy was highly occurred in the Fe and Zn deficient plot in Ilpoom variety and P and Zn deficient plot in Taeback variety. In 80Gy irradiated group, radiosensitivity of rice plant was high in the P and Ca deficient plot of both Ilpoom and Taeback variety.

저선량 방사선에 의한 작물의 활성증진

김재성,이영복 ( Jae Sung Kim,Young Bok Lee ) 한국환경농학회 1998 한국환경농학회지 Vol.17 No.1

The most remarkable aspect in the hormesis law is that dose of harmful agents can produce effect that are diametrically opposite to the effect found with high doses of the same agent. Minute quantities of a harmful agent bring about very small change in the organism and control mechanisms appear to subjugate normal processes to place the organism in a state of albert and repair. The stimulated organism in more responsive to changes in environmental factors than it did before being alerted. Routine functions, including repair and defense, have priority for available energy and matetial. The alerted organism utilizes nutrients more efficiently, grows faster, shows improved defense, and lives longer. Accelerated germination, sprouting, growth, development, blooming and ripening, and increased crop yield and resistance to disease are found in plants. Another concept supported by the data in that low doses of ionizing radiation provide increased resistance to subsequent high doses of radiation. The hormesis varies with subject plant, variety, state of seed, environmental and cultural conditions, physiologic function measured, dose rate and total exposure. The results of hormesis are less consistently found, probably due to the great number of uncontrolled variables in the experiments. The general dosage for radiation homlesis in about 100 (10 to 1,000) times ambient or 100 (10 to 1,000) times less than a definitely harmful dose, but these must be modified to the occasion. Although little is known about most mechanisms of homzesis reaction, overcompensation of repair mechanism is offered as one mechanism.

3요소(三要素) 및 석회처리(石灰處理)가 들깨의 지방조성(脂肪組成) 및 수량(收量) 구성요소(構成要素)에 미치는 영향(影響)

김재성,이영일,신인철,Kim, Jae-Sung,Lee, Young-Il,Shin, In-Chul 한국토양비료학회 1992 한국토양비료학회지 Vol.25 No.2

들깨의 시비조건(施肥條件)에 따른 수량(收量)과 함유량(含油量) 등을 조사한 결과는 다음과 같다. 1. 시비조건(施肥條件)에 따라 초장(草長), 가지수, 마디수, 화방수는 별 차이가 없었으며 가리시용(加里施用)은 들깨의 수량(收量)과 함유량(含油量)을 증가시키는 효과가 있었고,인산혼용(燐酸混用)은 들깨의 수량(收量)을, 석회(石灰)는 함유랑(含油量)을 증가시키는 효과가 있었다. 2. 가리(加里), 석회(石灰), 인산(燐酸)의 조합시비(組合施肥)는 종실(種實)을 크게 하나 함유량(含油量)은 낮았다. 3 들깨의 지방산조성(脂肪酸組成)은 lenolenic acid 가 64.5%로 최고(最高)였으며 다음이 oleic acid (14.0%), linoleic acid(13.8%) palmitic acid (5.4%). stearic acid (1.8%) 순이었고 시비조건(施肥條件)에 따른 특별한 분포경향을 보이지 않았다. 4. 들깨 종실(種實)의 회분중 무기성분(無機成分)은 K(21.3%), Ca(12.8%), Mg(8.2%), Fe(0.34%), Zn(0.15 %), Mn(0.1%), Na(0.08%) 순이었다. This experiment was carried out to investigate the effect of the application conditions of fertilizers on the seed yield and oil content of Perilla ocymoides L. The results were summarized as follows; 1. Plant height, number of nodes and branches, and number of clusters were not significantly affected by the application of fertilizers, but yield capacity and oil content of perilla increased by the potassium application. Phosphate application resulted in incerased seed yield and calcium application significantly affected the oil content. 2. The combined application of phosphate, potassium and calcium resulted in a big seed size but oil content was not high. 3. The fatty acid composition of perilla was not showed affected by the effect of application of fertilizer Unsaturated linolenic acid (64.5 %) was highest in the content of main fatty acid in perilla lipid followed by oleic acid (14.0 %), linoleic acid (13.8 %), palmitic acid (5.4 %) and stearic acid (1.8 %). 4. The contents of inorganic substances in seed ash of perilla showed the distribution pattern of K(21.3 %), Ca(12.8 %), Mg(8.2 %), Fe(0.34 %), Zn(0.15 %), Mn(0.10 %) and Na(0.08 %).

질소와 인산시용에 (燐酸施用) 따른 무우 및 배추의 90Sr 흡수 영향

김재성,이영일,이상재,임수길 ( Jae Sung Kim,Young Il Lee,Sang Jae Lee,Soo Kil Lim ) 한국환경농학회 1991 한국환경농학회지 Vol.10 No.1

The influence of phosphorus and nitrogen application on the uptake of radioactive strontium by Chinese cabbage and raddish was studied in pot experiments. The dry matter yield of Chinese cabbage and raddish increased with the application of phosphorus and nitrogen. High yield of raddish was obtained by the additions of nitrate while Chinese cabbage was obtained by the ammonium. The content of potassium in the vegetables was enhanced by the application of phosphorus. and the calcium content increased with the application of nitrogen. The content of ^(90)Sr was higher in the raddish than in the Chinese cabbage while the ^(90)Sr activity in the dry matter of vegetables decreased considerably with the application of phosphorus and nitrogen fertilizer. This indicates that the suppression of uptake was more effective with the application of nitrate than with ammonium.

대신호 시영역 모델을 이용한 광섬유 격자 외부 공진 레이저 다이오드의 해석

김재성,정영철,조호성,Kim, Jae-Seong,Chung, Youngchul,Cho, Ho Sung 한국광학회 2012 한국광학회지 Vol.23 No.5

본 논문에서는 RLD (Reflective Laser Diode)와 FBG (Fiber Bragg Grating)가 하이브리드 집적된 LD (이하 FG-LD)의 정적 및 동적 특성을 해석하기 위하여 대신호 시영역 모델링 방법을 구현하였다. FBG의 유효길이 2.1 mm를 포함한 외부 집적 공진기의 길이가 8 m인 경우에 0.44GHz의 동적 주파수 요동과 6.4 GHz 정도의 동적 주파수 요동 결과를 나타내었다. 또한 10 Gbps NRZ 신호의 아이가 크게 오픈된 상태를 잘 유지함을 확인하였다. FG-LD는 50 km 정도의 길이를 커버하는 10 Gbps 급 단일파장 레이저로서의 효용성이 있을 것으로 기대된다. A large-signal time-domain model is implemented to analyze an FG-LD (Fiber Grating Laser Diode) in which a reflective laser diode is hybrid-integrated with a fiber Bragg grating (FBG). When the length of the externally integrated resonator is 8 mm, in which the effective FBG length of 2.1 mm is included, a static frequency chirp of 0.44 GHz and a dynamic frequency chirp of 6.4 GHz are observed. In addition, it is also observed that the eye of the 10Gbps NRZ signal is well open. The FG-LD is expected to be a cost-effective solution for a 10Gbps-class single wavelength laser covering a span of 50 km range.

Primary Radiation Therapy of Polymorhic Reticulosis

김재성,윤형근,안용찬,박찬일,Kim Jae Sung,Yun Hyoung Geun,Ahn Yong Chan,Park Charn Il The Korean Society for Radiation Oncology 1991 Radiation Oncology Journal Vol.9 No.2

From 1979 to 1987, 33 patients with polymorphic reticulosis (PMR) limited in the upper airway were treated with primary radiation therapy and the analysis of treatment results was undertaken. Systemic symptoms such as fever, night sweats, and weight ioss were noted in $48\%$. The nasal cavity was most frequently involved $(85\%)$, although involvement of PNS $(33\%)$ and palate $(30\%)$ was not uncommon. The 5 and 10 year actuarial survival rates were $47\%\;and\;40\%$, respectively. The difference in NSD between patients with in-field failure and those without it was significant statistically. Also, field size was significantly smaller in patients with marginal failure than those without it. During the follow-up period, systemic failure was found in S patients (diffuse histiocytic Iymphoma in 4, histiocytic medullary reticulosis in 1). In this study, we can suggest that total radiation dose of at least 4500 cGy with generous treatment volume should be delivered to achieve better local control and that the developement of an effective systemic chemotherapeutic regimen is required to improve the survival after systemic relapse. 1979년부터 1987년까지 서울대학교 병원에서 상기도에 국한된 다형성 세망증으로 근치적 방사선치료를 받은 33명의 환자의 치료성적을 분석하였다. 발열, 체중감소, 도한등의 전신적 증상은 대상 환자중 $48\%$에서 나타났으며 침윤병소로는 비강이 $85\%$로 가장 많았고 븐비동 및 구개부가 각각 $33\%$와 $30\%$이었다. 전체 환자의 5년 및 10년 생존율은 각각 $47\%$와 $40\%$이었다. 방사선 조사야 내에서 재발한 경우와 그렇지 않은 경우간의 방사선 선량 차이는 통계학적으로 유의하였으며 조사야 경계부위에서 재발한 경우는 그렇지 않은 경우에 비해서 조사야 면적이 작았다. 추적 관찰 기간중 악성 임파종 4예, 골수 세망증 1예 등의 전신적 전이가 확인되었다. 따라서 방사선 치료를 시행하여 다형성 세망증의 국소 치료율은 향상시키기 위해서는 최소 4,500 cGy의 선량과 병소주위의 조직을 충분히 포함하는 조사야를 사용해야 하며 전신적 전이를 효과적으로 치료할 화학요법 면에서의 개선이 필요하다고 판단된다.

전리방사선에 의한 배추와 무의 생육촉진효과

김재성,김진규,이은경,이영복 ( Jae Sung Kim,Jin Kyu Kim,Eun Kyung Lee,Young Bok Lee ) 한국환경농학회 1997 한국환경농학회지 Vol.16 No.4

Hormetic effects of low dose radiation were analyzed in terms of growth stimulation in radish and three cultivars of chinese cabbage. Seeds irradiated with γ radiation were planted in the green house and in the experimental field. Though it varied with cultivars of tested plants, hormetic effect of low dose γ radiation on an early stage of growth were shown especially in germination rates and elongation of seedlings. The height of seedlings increased in 0.2 Gy irradiated group of Seolim cultivar and radish, in 1 Gy irradiated group of Konaenggi cultivar and in 4 Gy irradiated group of Ducksung cultivar, respectively, In case of plants grown in the experimental field, prominent were the height increase of radish and Seolim cultivar in 1 Gy irradiated group and the fresh weight increase of both radish and cabbage in 4 Gy irradiated group.

아질산계 하이드로탈사이트를 혼입한 단면복구모르타르 및 밀폐형 건$\cdot$습식 복합 분체이송$\cdot$압송장치에 의한 콘크리트 구조물의 보수공법 (건설교통부 지정 신기술 제462호)

김재성,배준영,김경덕,강석표,주동철,김정환,Kim, Jae-Sung,Bae, Jun-Young,Kim, Gyoung-Dyuk,Kang, Suk-Pyo,Joo, Dong-Chul,Kim, Jung-Hwan 한국구조물진단학회 2006 한국구조물진단유지관리공학회지 Vol.10 No.1

운동형태에 따른 최대 운동이 심근 산소소비량과 혈중 젖산 농도의 변화에 미치는 영향

김재성,김성수,장경모,Kim, Jae-Seong,Kim, Sung-Soo,Jang, Kyung-Mo 대한물리치료과학회 2003 대한물리치료과학회지 Vol.10 No.1

The purpose of this study was to compare the effects of different exercise types including isokinetic, isometric, and istonic exercise of same exercise intensity on cardiopulmonary function and blood lactate level. The subjects of this study included 17 males college students. Each subjects after pretraining measurement performed isokinetic, isometric and isotonic exercise of 1 week interval using Cybex 6000 System. KBI-C and YSI 1500 were used to measure changes in cardiopulmonary function and blood lactate level respectively. First, comparing changes in RPP relative to exercise type, isokinetic group showed significant difference between before exercise ($7.08{\pm}1.12mg/kg/min$) and post exercise ($18.98{\pm}1.75mg/kg/min$). Isometric group showed that significant difference between before exercise($7.89{\pm}0.98mg/kg/min$) and post exercise($20.22{\pm}2.41mg/kg/min$). Isotonic group showed significant difference between before exercise ($8.14{\pm}0.11mg/kg/min$) and post exercise ($19.84{\pm}2.30\;mg/kg/min$). Second, comparing changes in blood lactate level relative to exercise type, isokineic group showed significant difference between before exercise ($2.99{\pm}0.65mmol$) and post exercise ($6.55{\pm}6.55mmol$). Isometric group showed significant difference between before exercise($1.71{\pm}5.48mmol$) and post exercise ($5.48{\pm}1.97mmol$). Isotonic group showed significant difference between before exercise($1.16{\pm}0.48mmol$) and post exercise($5.21{\pm}1.28mmol$). The results of this study indicate significant differences RPP in isometric exercise and significant differences blood lactate in isotonic exercise.