담배의 노화과정 중 광합성 및 단백질 함량의 변화

이상각,심상인,강병화,Lee, Sang-Gak,Shim, Sang-In,Kang, Byeung-Hoa 한국연초학회 1995 한국연초학회지 Vol.17 No.1

This study was carried out to obtain the basic data which include the change of the photosynthetic rate and protein content according to growth stage in the process of senescence of tobacco plant The photosynthetic rate was the maximum with 26.31$\mu$mol.CO2/m2.sec and stomatal resistance was the minimum with 0.2552cm/sec at 15th days after leaf emergence. However, after 50 days the photosynthesis was very little occurred. During leaf developments the number of chloroplast was increased and reached at the maximum at 25th days after emergence of leaf, thereafter, it was decreased gradually. The content of protein increased continuously and showed the highest value at 15th days after leaf emergence. The degradation rate of soluble protein was more rapid than that of insoluble protein at early stage of senescence. The range of decrement in the insoluble protein was low at late stage of senescence. The content of Rubisco, the key enzyme of photoamthesis, corresponded to about 50% of soluble protein and reached to the maximum at 150 days after leaf emergence. As the senescence progressed, the content of large subunit(UV) of Rubisco showed a tendency to decrease more rapidly than that of small subunit(SSU). The total amount of amino acids was the highest at 15th days after leaf emergence.

구상성단 거성들의 분광 연구

이상각,LEE SANG-GAK 한국천문학회 2000 天文學論叢 Vol.15 No.suppl1

A large scatter of the chemical abundances among globular cluster red giants has been observed. Especially the chemical elements C, N, O, Na, Mg, and Al vary form star to star within globular clusters. Except for $\omega$ Cen and M22, most globular clusters could be considered to be monometallic of their iron peak elements within error ranges. The variations in light elements among globuar cluster giants appear much more pronounced than in field halo giants of comparable Fe-peak metallicity. It has been found that in general the nitrogen abundance is anticorrelated with both carbon and oxygen, while it is correlated with Na and AI. These intracluster abundance inhomogeneities can be interpreted either by mixing of nucleosythesized material from the deep stellar interior during the red giant branch phase of evolution or by inhomogeneities of primordially processed material, from which the stars were formed. The simple way of distingushing between two senarios is to obtain the element abundances of main-sequence stars in globular clusters, which are too faint for high resolution spectroscopic studies until now. Both 'evolutionary' and 'primodial' origins are accepted for explanations of abundance variations among red giants and CN-CH anticorrelations among main-sequence stars in globular clusters. This paper reviews chemical abundances of light elements among globular cluster giants, with brief reviews of cannonical stellar evolution of low mass stars after main-sequence and deep mixing for abundance variations of cluster giants, and a possible connection between deep mixing and second parameter.

PDS 측정 구경과 속도가 스펙트럼선에 주는 영향

이상각,오승준,김은혁,Lee, Sang-Gak,O, Seung-Jun,Kim, Eun-Hyeok 한국천문학회 1993 天文學論叢 Vol.8 No.1

The variation of instrumental profile for the different scan speed of PDS is estimated as FWHM of the assumed Gaussian Profile. The effects of scan speed and scan aperture of PDS on the objective prism spectrum analysis are investigated for 8 combinations of scan speed and scan aperture. Amomg them. D1 apture with 15 csu is found to be the most optimum choice for measuring KISO objective prism film. We suggest the preliminary test study of the scan speed and aperture for the optimum use of PDS for any massive scan of spectra. The optimum scan speed and aperture depends on the dispersion of spectrum as well as the type of phtographic emulsion.

4도 대물 프리즘 건판에서 PDS에 의한 스펙트럼 지수 측정

이상각,백원근,홍승수,Lee, Sang-Gak,Baek, Won-Geun,Hong, Seung-Su 한국천문학회 1993 天文學論叢 Vol.8 No.1

In order to check whether the 4-degree objective prism spectra can be used for deep spectroscopic studies of galactic structure, we measured the Rose(1984)'s seven indices between 3500 A and 4400 A for 19 Hyades stars on the Kiso Schmidt prism plate, K3496. By comparing the $4^{\circ}$-indices with those of Rose(1984), we have found that $H{\delta}/FeI$, $H{\gamma}/4325$, and P(3912)/P(CN) measured on the 4-degree prism spectra, are still useful for the derivation physical parameters.

Zn 및 Cu 오염토양에서 담배에 의한 복원 탐색

이상각(Sang Gak Lee),강병화(Byeung Hoa Kang) 한국환경농학회 2001 한국환경농학회지 Vol.20 No.4

This study was conducted to evaluate the effect of Zn and Cu on physiological responses of tobacco at the different leaf ages for the purpose of phytoremediation of heavy metal contaminated field. Plant height was significantly decreased at Zn and Cu concentrations of 1.0 mM or higher. Especially, root dry weight decreased more (50% reduced) than shoot dry weight. Zn and Cu accumulation in the shoot and root was dramatically increased after 2.0 mM treatment. The accumulation pattern was different by leaf aging in that Zn accumulated more in senescence leaf and Cu accumulated more in growing leaf. The amounts of heavy metal accumulations per plant were 146,000 ㎎/㎏ for Zn and 20,500 ㎎/㎏ for Cu at 2.0 mM treatment. The proper harvesting time would be suggested as vegetative growth stage for Zn and reproductive stage for Cu. The concentrations of other inorganic ions (Mg, Mn, Fe) were decreased when Zn and Cu concentrations were increased. Cu concentration and Zn concentration of both shoot and root were decreased in Zn treatment and Cu treatment, respectively.

염스트레스가 담배식물의 광합성 , proline 및 이온함량에 미치는 영향

이상각(Sang Gak Lee),신주식(Ju Sik Shin),석영선(Yeong Seon Seok),배길관(Gill Kwan Bae) 한국환경농학회 1998 한국환경농학회지 Vol.17 No.3

This experiment was conducted to investigate effects of NaCl concentration on photosynthetic rate, free proline content and ion content in tobacco. As NaCl concentration was increased growth was retarded. The decrease growth characteristics(shoot/root ratio was 2.0) at 90mM NaCl indicated that this concentration could be a limiting level. As NaCl concentration was increased photosynthetic rate, transpiration rate, and water use efficiency were decreased. Photosynthetic rate was highly decreased at 60mM NaCl. There was no significant difference between transpiration rate and water use efficiency. Leaf water potential was decreased as NaCl concentration was increased, in that twice lower at 30mM than that of control and drop largely at 120mM NaCl. Free proline content was increased as NaCl increased until 120mM NaCl and drop at 150mM NaCl. The Ca^(2+), Mg^(2+), and K^+ contents were increased until NaCl concentration was 120mM. The Na^+ content was slowly increased as NaCl concentration increased until 120mM NaCl, and largely increased at 150mM NaCl. There was no significant difference between Cl^- and NaCl treatments except 30 mM NaCl in which Cl^- content was higher than that of control. As NaCl concentration was increased K^+/Na^+ ratio was decreased. The negative correlation between K^+ and Na^+, and positive correlation between K^+/Na^+ and protein content were found.

염스트레스가 담배식물의 Protein , ATPase 및 Peroxidase 활성에 미치는 영향

이상각(Sang Gak Lee),강병화(Byeung Hoa Kang),이학수(Hak Su Lee),배길관(Gill Kwan Bae) 한국환경농학회 1998 한국환경농학회지 Vol.17 No.4

The analysis of biochemical changes in tobacco plant as increase of NaCl concentraion was conducted. Total protein content and soluble protein content were decreased as NaCl concentration was increased, in that steady decreased until 120mM NaCl and largely decreased at 150mM NaCl. The expression of 74Kd subunit was increased until 60mM NaCl. However, the amount of 74Kd protein was decreased from 90mM NaCl. There was no difference for expression of other protein subunits. Chlorophyll a content was significantly decrease as NaCl concentration was increased, but chlorophyll b content was not much decreased. The slow increase up to 120mM NaCl and large increase at 150mM NaCl for ATPase and peroxidase activities indicated that 120mM NaCl could be a limiting concentration for salt injury.

영성문화자원으로서 남양성모성지의 가치를 통한 지역관광활성화 연구

이상각(Lee, Sang-gak),양승탁(Yang, Seung-tak) 한국문화융합학회 2019 문화와 융합 Vol.41 No.3

This study has been done for the purpose of activating local tourism by utilizing resources that hold attraction as spirituality cultural resources. These include holy and religious sites as well as healing tourism. Furthermore, if religious facilities are included to develop various programs, these will be great resources for activating local tourism. Therefore, this research tries to suggest strategies for linking The Shrine of Our Lady of the Rosary of Namyang, located in Hwaseong, Gyeonggi do, with local tourism; this has been done by estimating its value as a religious facility and spirituality cultural resource, and considering its preservation value as a tourism resource. In the case of this area, a cathedral and peace cultural sharing center are being built by a global architec and these areas will be used not only as religious facilities but also as a concert hall, library, and exhibition hall. What is more, these will be social and cultural facilities for local residents. The value of this structure, The Shrine of Our Lady of the Rosary of Namyang, has been estimated through the Contingent Valuation Method (CVM). For this contingent valuation, a survey was conducted from January 15, 2018 to February 28, 2018. This survey identified locals here and visitors illingness to make a donation for establishing The Shrine of Our Lady of the Rosary of Namyang and analyzed the responses empirically. Based on the result from CVM, WTP truncated mean of the value of The Shrine of Our Lady of the Rosary of Namyang is approximately 329,273 Korean Won per house. The total preservation value is expected to be 102.5 billion Korean Won. Such a value may show major donation willingness from Catholics, as this is a religious facility. However, as a result of estimation based on a logit model, main variables affecting donation intention include suggested price, level of support for facility establishment, and local identity. This implies that enhanced local identity may influence payment value of local spirituality cultural resources; also, level of support for establishing a cathedral and peace cultural center affected its payment value as well. The value of The Shrine of Our Lady of the Rosary of Namyang as a spirituality cultural resource is confirmed through this research. If its image as a local tourism resource is promoted through development of various programs, it will lay a strong foundation for activating local tourism. 본 연구는 영성문화자원으로서 관광적 매력을 지닌 자원의 활용을 통해 지역관광의 활성화를 위한 관점에서 진행되었다. 영성문화자원은 성지관광, 종교관광, 치유관광의 개념을 포함한 보다 넓은 범위의 활동을 위한 자원이 될 수 있으며, 종교적 시설을 이용하여 다양한 프로그램을 활용한다면 지역관광 활성화에 기여할 수 있는 자원이 될 수 있다. 따라서 경기도 화성시에 위치한 남양성모성지를 대상으로 종교적 시설인 영성문화자원의 가치를 추정하여 단순한 시설적 가치 외에 관광자원으로서의 보존가치를 파악해 봄으로써 지역관광과 연계할 수 있는 전략을 제시하고자 하였다. 특히 남양성모성지의 경우 세계적인 건축가에 의해 대성당과 평화문화나눔센터가 건립중이며, 이러한 시설은 단순 종교시설이 아닌 콘서트홀, 도서관, 북카페, 상설 및 기획전시관 등으로 이용될 예정이며, 지역주민을 위한 사회 문화적 시설로 활용될 예정이다. 이에 가상가치추정법(CVM)을 통해 남양성모성지의 건축물 건립에 대한 가치를 추정하였다. 가치추정을 위해 2018년 1월 15일부터 2월 28일까지 설문조사를 실시하였으며, 총 374명의 의견을 토대로 남양성모성지의 건축물 건립에 대한 개발기부금의 명목으로 지불의사를 파악하여 실증분석에 활용하였다. CVM을 통해 추정된 남양성모성지의 가치는 절단된 평균값(WTP truncated mean)을 기준으로 할 경우 가구당 329,273원으로 추정되었으며, 총 보존가치는 약 1,025억 원으로 추정되었다. 이는 종교적 시설이라는 특성 상 천주교 신도 여부가 지불의사에 많이 반영되긴 하였으나, 로짓모델 추정 결과 지불의사에 영향을 미치는 주요 변수로 제시금액, 시설 건립에 대한 지지도, 지역의 정체성 등이 영향을 미치는 것으로 나타났다. 이는 결과적으로 지역에 대한 정체성의 향상이 지역 내 영성문화자원에 대한 지불가치에도 영향을 줄 수 있으며, 대성당과 평화문화나눔센터 등의 건립에 대한 지지도 역시 영성문화자원에 대한 지불가치에도 영향을 주는 것을 확인하였다. 본 연구를 통해 영성문화자원으로서 남양성모성지의 가치를 확인하였으므로, 향후 이러한 시설을 기반으로 다양한 프로그램의 개발을 통해 지역관광자원으로의 이미지를 부각시키고 발전시키면 지역관광 활성화를 위한 기초가 될 수 있을 것이다.

토란밭의 잡초발생 양상과 몇가지 제초제의 단제 (單劑) 및 조합처리가 제초효과와 수량에 미치는 영향

강병화,이상각,심상인,이기철 ( Byeung Hoa Kang,Sang Gak Lee,Sang In Shim,Gi Chul Lee ) 한국환경농학회 1992 한국환경농학회지 Vol.11 No.2

A cultivar of taro(Colocasia antiquorum var. esculenta Engl.), Tosutoran was cultivated with planting density 60×30 ㎝ at the field of Kwang-ju located in Kyeong-ki province in 1989. The purpose of this experiment was to attain the basic information about the pattern of weed occurrence and the effect of weed control on yield by various treatments in taro field. Ethalfluralin(35 EC), Clomazone(47.1 EC), Paraquat(24.5 Lq.) fb Ethalfluralin and Paraquat fb Clomazone were treated except for untreated plot and hand weeding plot. Weeds occurred were 15 species in l2 families, the dominant weed species were Echinochloa crus-galli, Potulaca oleracea, Acalypha australis in taro field. Weed control effects were higher in combination treatments than in single treatments so the yield was higher in combination treatment than in single treatment. Yield of untreated plot was reduced to 91.8% by comparison with that of hand-weeding plot.

비(非) Friedmann 우주

현정준,이상각,민호기,Hyeon, Jeong-Jun,Lee, Sang-Gak,Min, Ho-Gi 한국천문학회 1987 天文學論叢 Vol.3 No.1

균질(均質) 등방성(等方性) 공간(空間)을 전제하는 Friedmann 우주의 타당성은 Planck 시기($t_p{\sim}10^{-43}sec$) 이진으로 소급시킬 수 없으므로 시초의 비(非)(Non) Friedmann 우주가 가능하다. 본 연구는 우주시초의 특이성과 관련되는 균질 우주와 비균질 우주의 특성, 지평선과 inflation의 관계를 개관한 다음, $t{\sim}t_p$의 양분자(量子論) 요동(搖動)이나 $t>t_p$의 GUT 상전이(相轉移)로 생기는 inflation 계기에 파생(派生)하는 시공(時空)의 거품들이 이루는 비균질(非均質) 우주의 가능성과 인간원리(人問原理)에 기반을 둔 우주 집단의 관련을 고찰한다.