Valuation of ecosystem services in the organic carbon of the Pinus densiflora forest at Mt. Namsan, Seoul Metropolitan City

Lee, Eung-Pill,Lee, Soo-In,Jeong, Heon-Mo,Han, Young-Sub,Lee, Seung-Yeon,Park, Jae-Hoon,Jang, Rae-Ha,Hong, Youg-Sik,Jung, Young-Ho,Kim, Eui-Joo,Lee, Sang-Hun,You, Young-Han The Ecological Society of Korea 2019 Journal of Ecology and Environment Vol.43 No.4

Background: Standing biomass, litter production, rate of litter decomposition, amount of litter on forest floor, and amount of soil organic carbon distribution were investigated from March 2016 to November 2018 in order to evaluate the ecosystem value through organic carbon distribution in the Pinus densiflora forest at Namsan, Seoul Metropolitan City. Results: The amount of organic carbon in the Pinus densiflora forest was 261.09 ton C ha^-1 during the research period, and fixed organic carbon in plant through net photosynthesis was 3.2 ton C ha^-1 year^-1. The organic carbon in plant was 62.77 ton C ha^-1 (24.04%), in litter on the forest floor was 3.65 ton C ha^-1 (1.40%), and in soil was 194.67 ton C ha^-1 (74.56%). The value of plant, litter on forest floor, and soil organic carbon distribution were each 6,277,000 won ha^-1, 365, 000 won ha^-1, and 19,467,000 won ha^-1. The value per ton of fixed organic carbon in plant through net photosynthesis was 320,000 won ha^-1 year^-1 and the value of ecosystem services stored in carbon in the Namsan forest ecosystem was about 26.1 million won ha^-1 for 3 years. Conclusions: The results of this study suggest that the pine forests of Namsan rapidly decompose leaves due to the high atmospheric temperature and accumulate a large amount of organic carbon in the soil to provide climate control regulatory service function.

Budget and distribution of organic carbon in Taxus cuspidata forest in subalpine zone of Mt. Halla

Jang, Rae-Ha,Jeong, Heon-Mo,Lee, Eung-Pill,Cho, Kyu-Tae,You, Young-Han The Ecological Society of Korea 2017 Journal of Ecology and Environment Vol.41 No.1

Background: In order to investigate organic carbon distribution, carbon budget, and cycling of the subalpine forest, we studied biomass, organic carbon distribution, litter production, forest floor litter, accumulated soil organic carbon, and soil respiration in Taxus cuspidata forest in Halla National Park from February 2012 to November 2013. Biomass was calculated by using allometric equation and the value was converted to $CO_2$ stocks. Results: The amount of plant organic carbon was $13.60ton\;C\;ha^{-1}year^{-1}$ in 2012 and $14.29ton\;C\;ha^{-1}year^{-1}$ in 2013. And average organic carbon introduced to forest floor through litter production was $0.71ton\;C\;ha^{-1}year^{-1}$. Organic carbon distributed in forest floor litter layer was $0.73ton\;C\;ha^{-1}year^{-1}$ on average and accumulated organic carbon in soil was $51.13ton\;C\;ha^{-1}year^{-1}$ on average. In 2012, Amount of released $CO_2$ from soil to atmosphere was 10.93 ton $CO_2ha^{-1}year^{-1}$. Conclusions: The net ecosystem production based on the difference between net primary production of organic carbon and soil respiration was $-1.74ton\;C\;ha^{-1}year^{-1}$ releasing more carbon than it absorbed.

Organic carbon distribution and budget of dominant woody plant community in the subalpine zone at volcanic Jeju Island, Korea

Jang, Rae-Ha,Lee, Seung-Yeon,Lee, Eung-Pill,Lee, Soo-In,Kim, Eui-Joo,Lee, Sang-Hun,You, Young-Han The Ecological Society of Korea 2019 Journal of Ecology and Environment Vol.43 No.4

Background: The Northern Hemisphere forest ecosystem is a major sink for atmospheric carbon dioxide, and the subalpine zone stores large amounts of carbon; however, their magnitude and distribution of stored carbon are still unclear. Results: To clarify the carbon distribution and carbon budget in the subalpine zone at volcanic Jeju Island, Korea, we report the C stock and changes therein owing to vegetation form, litter production, forest floor, and soil, and soil respiration between 2014 and 2016, for three subalpine forest ecosystems, namely, Abies koreana forest, Taxus cuspidata forest, and Juniperus chinensis var. sargentii forest. Organic carbon distribution of vegetation and NPP were bigger in the A. koreana forest than in the other two forests. However, the amount of soil organic carbon distribution was the highest in the J. chinensis var. sargentii forest. Compared to the amount of organic carbon distribution (AOCD) of aboveground vegetation (57.15 t C ha^-1) on the subalpine-alpine forest in India, AOCD of vegetation in the subalpine forest in Mt. Halla was below 50%, but AOCD of soil in Mt. Halla was higher. We also compared our results of organic carbon budget in subalpine forest at volcanic island with data synthesized from subalpine forests in various countries. Conclusions: The subalpine forest is a carbon reservoir that stores a large amount of organic carbon in the forest soils and is expected to provide a high level of ecosystem services.

레토르트파우치 튀김어묵의 熱處理條件에 關한 硏究 : 2. 熱處理條件과 Cook-value

河璡桓,李應昊,金珍洙,具在根 제주대학교 1991 논문집 Vol.33 No.-

魚肉煉製品은 最近 그 生産量이 急增하고 있으나 AF-2등 食品防腐劑의 使用이 전면 禁止됨에 따라 재래식 方法으로 만든 어묵은 유통에 상당한 어려움을 겪고 있다. 本 硏究는 이를 解決하기 위한 方案의 하나로 營養的 및 官能的인 品質의 低下를 最少化할 수 있는 高溫熱處理條件을 찾고자 하였다. 즉 熱處理時間은 F。값 6을 基準으로 하고 레토르트파우치 튀김어묵의 크기와 熱處理溫度를 달리 하였을 때의 品質을 C값을 利用하여 檢討하였다. 그 結果를 要約하면 다음과 같다. Fourier數의 性質과 같이 熱處理溫度가 높을수록 그리고 製品의 직경이 작을수록 熱處理時間을 短縮할 수 있었으며 熱處理溫度가 製品의 직경보다 熱處理時間을 短縮시키는데 더 크게 影響을 미쳤다. 製品의 中心, 表面 그리고 體積平均 C값은 모두 직경이 가장 작은 12㎜의 것이 제일 적었고 직경이 가장 큰 31㎜의 것은 제일 컸으며 이 경향은 熱處理溫度가 높을수록 뚜렸하였다. C값은 前報에서의 結果와 잘 一致하여 레토르트파우치 튀김어묵의 品質을 評價하는 좋은 理論的 指標가 될 수 있었으며 직경이 16㎜ 혹은 그 以下의 것은 高溫短時間熱處理로 品質低下를 最少化할 수 있었다. The fish meat paste products are rapidly growing in its production. However, the recent prohibition of AF-2 gives a lot of difficulties in the marketing of fish meat paste products manufactured by conventional procedures. The present study aims to obtain the thermal treatment conditions for minimizing the quality deterioration of the fish meat paste products. The fried fish meat paste was sealed in the retort pouches and treated by heat under the condition which the F。-value designated to 6. The influences of the thermal treatment temperature (112,116,120 and 124℃) and the diameter of the products ( 12,16,23,27 and 31㎜) on the quality were investigated using the cook-value. The results are summarized as follow: Like as characteristics of Fourier number, the thermal treatment time was shortened with higher temperature and smaller diameter. The increase in temperature influenced more effectively to shortening the thermal treatment time than decrease in the diameter of the products. The products with 12㎜ in diameter marked the lowest cook-values of center, surface and volume average in all and those with 31㎜ the highest values. From the results described above and in previous work, cook-values could be extensively used in the determination of quality of the fried fish meat paste products since those values conincided well with other practical values such as jelly strength, texture, color values and in vitro protein digestibility. It was concoluded that the fried fish meat paste products with 16㎜ or less in diameter which were thermally treated at higher temperature could minimize quality deterioration.

요부 변성 후만증에서 Wedged Cage(SynCage^�]를 이용한 전후방 수술적 치료

김응하,김선우 대한척추외과학회 2003 대한척추외과학회지 Vol.10 No.3

自然科 探究過程 技能測定 評價자料開發에 關한 硏究

李應頀,河炳權 서울교육대학교 과학교육연구소 1977 科學과 數學敎育 論文集 Vol.3 No.-

결핵성 척추염 환자에서 장요근 농양제거술 후 발생한 가성 복부 대동맥류의 치험

김웅하 순천향의학연구소;Soonchunhyang Medical Research Institute 2004 Journal of Soonchunhyang Medical Science Vol.10 No.2

Aortic pseudoaneurysm in tuberculous spondylitis is rare and thought to be caused by direct infiltration of tuberculous infection. This weaked aortic wall can be damaged by minor surgical insult and progress to dangerous pseudoaneurysm. We experienced on case of aortic pseudoaneurysm after psoas abscess curettage and treated with stent insertion and antituberculous medication.

Studies on processing and storage of eel, Anguilla japonica 1.Changes in free amino acids during processing : 제1보. 가공중의 유리아미노산의 변화

송대진,하진환,이응호 제주대학교 해양연구소 1982 해양자원연구소연구보고 Vol.6 No.-

정신분열병환자의 혈소판막과 ³H-spiperone결합에 관한 연구

양병환,박응철,정하승 大韓神經精神醫學會 1989 신경정신의학 Vol.28 No.5

This research was to determine whether changes of dopamine receptors on the platelet membrane of schizophrenics could be used as a biological marker for schizophrenia. ³H-spiperone binding to platelet membranes was carried out in 22 schizophrenic patients who fulfilled DSM-ⅢR criteria and 14 age-matched control subjects. ³H-spiperone specifically binds to dopamine D2 receptor with high affinity. Increased Bmax can suggests increase in the number of dopamine receptors on the platelet membrane. The results are as follows ; 1) Bmax of the patient group was significantly higher than that of control group(p<.05). 2) Kd was not significantly different between the two groups. 3) Bmax of the positive and the negative symptom groups were significantly higher than the control group when the patient group was subdivided into the positive, the negative and the mixed symptom groups(p<0.5). 4) Kd of the positive symptom groups, the negative symptom groups and the control group were not significantly different among each other. 5) Bmax and Kd of the positive and the mixed and the negative symptom groups were not significantly different among each other. This results shows that increase in the number of depamine receptors on the platelet membrane of schizophrenics would be a part of disease process in schizophrenia.

HPGe 검출기에 의한 지각방사선의 핵분광학적 연구

전재식,채하석,진응국,이철영,조혁,하정우 충남대학교 기초과학연구소 1992 연구논문집 Vol.12 No.-

고순도 Ge(HPGe) 검출장치를 사용한 현장측정을 통하여 지각방사선에 대한 핵분광학적 연구를 수행하였는바 지각방사선장의 핵분광학적 특성차이를 규명하기 위하여 지면의 자연방사성 핵종분포가 대표적 전형인 충남대학교 캠퍼스내 미경작 개활지 잔디밭과, 우라늄 함량이 높은 곳으로 알려진 괴산군 덕평리 지역 등 특이한 두 지역을 측정지점으로 선택하였다. 환산선량의 비교확인을 위하여 HPGe 분광측정은 3″ø×3″원통형 NaI(T1) 섬광검출기에 의한 분광측정과 동시에 수행하였으며 본 연구에 사용된 HPGe 검출기에 대한 스펙트럼-선량율 환산인자 G(E)는 감마선속이 검출기 축에 수직 입사하는 것으로 가정하고 Monte Carlo 방법으로 씨뮬레이션한 감응스펙트럼들을 사용하여 산출하였다. 이 G(E)를 사용하여 산출된 선량율(D˙_Ge)은, 이미 기준기급 전리함과의 비교 교정을 통하여 스펙트럼-선량 환산체계가 확립된 바 있는 NaI(T1) 검출기로 구한 선량율(D˙_NaI)과 만족스러운 일치를 보였으며 D˙_Ge와 D˙_NaI 사이의 상관계수는 +0.9988, 회귀 방정식의 기울기는 1.001을 나타내었다. 측정한 스펙트럼에서는 미미한 크기의 ^137Cs 감마선 피크가 확인되었으나 1960년대에 수행되었던 대기권 핵실험의 영향이나 Chernobyl 원전사고의 영향은 관측되지 않았다. Study of terrestrial gamma-rays was carried out by means of in-situ spectrometry using high purity germanium (HPGe) detector system. Two distinguishable fields of measurements, namely, uncultivated flat lawns in CNU campus where the distribution of natural radionuclides in the ground in known to be quite typical and well-known uranium rich area of Dukpyung-ri in Gwoesan-kun were selected in order to specify the difference in spectrometric characteristics of the fields. In-situ HPGe spectromety was accompanied by scintillation spectrometry with 3″ø×3″cylindrical NaI(T1) detector for comparative confirmation of derived dose rates from the spectra measured. Spectrum-dose rate conversion operator, G(E), of our particular HPGe detector was calculated using response spectra simulated by Monte Carlo method with an assumption of gamma-ray beams incident vertically to the detector axis. Resultant dose rates (D˙_Ge) showed satisfactory agreement with those obtained by NaI(T1) spectrometry and corresponding G(E) operation (D˙_NaI) of which system has been well-established through intercalibration with a reference ion chamber. Correlation coefficient and the slope of regression equation between D˙_Ge and D˙_NaI came out to be +0.9988 and 1.001, respectively. Though traceable height of ^137Cs gamma-ray peak was identified on the field spectrum, ground contamination of fission products released from atmospheric nuclear test performed in 1960s and possibly from Chernobyl accident was not observed as of today.