南江댐 上流 河中島의 初期遷移에 따른 植生構造와 上壤의 性質

李忠泳,吳炅煥 경상대학교 환경보전연구소 1993 環境保全硏究所報 Vol.1 No.1

하증로의 초기천이에 따른 토양의 성질과 식생구조를 규명하기 위하여, 경남 진주시의 남강댐 상류에 위치한 하증도에서 1989년 10월부터 1991년 9월까지 토양의 이화학적 특성, 식물상, 식물군락의 구조 및 버들속의 분포 등을 조사하였다. 1. 토양의 유기물 함량은 0.79~6.22%, 총질소량은 0.1~2.4 mg g^-1, 유효인량은 7.3~39.6 ㎍ ㅎ^-1, pH는 5.24~6.79, 전기전도도는 14~210 ㎛ho cm^-1이었고 입경조성은 모래 50.0~95.0%, 미사 2.5~47.0%, 점토 1.0~6.0% 등으로서 계절적으로 조사지소에 따라 차이가 있었다. 토향깊이에 따른 유기물 함량과 총질소량은 상층부에서 높았으며 pH는 대체로 낮아졌다. 2. 하중도에서 조사된 관속식물은 38 과 94 속 129 종 20 변종 2품종으로 총151종류였다. 이중 양치식물이 2 종류 피자식물이 149 종류였고, 피자식물은 단자엽식물이 50 종류 쌍자엽식물이 99 종류였으며, 쌍자엽식물 중 목본은 17 종류였다. 3. 초본 중에서 우점종은 중요치가 26.3인 도꼬마리 (Xanthium strumarium)였고 여뀌 (Persicaria hydropiper)가 중요치 24.1로 아우점하였으며, 물억새 (Misconthus sacchariflorus), 세모고랭이 (Scirpus triqueter), 물잔디 (Pseudoraphis ukishaba)등의 순으로 중요치가 낮아졌다. 4. 초지식생의 군총분석 결과 양의 상관은 여뀌 (Persicaria hydropiper)가 8회로 가장 높고, 그 다음이 미국가막사리 (Bidens frondosa)와 도꼬마리 (Xanthium strumarium)가 각각 7회로 나타났다. 음의 상관은 세모고랭이(Scirpus triqueter)가 6회로 가장 많고, 쇠치기풀 (Hemarthria sibirica) 및 물억새 (Miscanthus sacchariflorus) 5회, 미국가막사리 (Bidens frondosa) 4회 등의 순으로 적었다. 5. 초지식생의 종다양도는 11월의 1.305부터 8월의 1.538까지 계절에 따라 차이가 있었다. 6. 본 하중도에서 조사된 12종의 버들류 (Salixspp.) 중 선버들 (Salix nipponica)이 우점종이었고 강계버들 (Salix kangensis)이 아우점하였는데, 이들 버들류는 하중도에서 초기천이의 개척식물로 추정되었다. Physico-chemical properties of soil, flora, plant community structure, and distribution of Salix spp. were investigated at the sandbar in the upper stream of the Namgang-Dam, near chinju city, Gyeongsangnam-Do, Korea from October 1989 to September 1991. 1. Ranges of the soil properties such as organic matter, total nitrogen, available phosphorus, pH, and conductivity were 0.79 ∼ 6.22%, 0.1 ∼ 2.4 ㎎ g^-1, 7.3 ∼ 39.6 ㎍ g^-1, 5.24 ∼ 6.79, and 14 ∼ 210 ㎛ho ㎝^-1, respectively. Percentages of the particle size for sand, silt, and clay were 50.0∼95.0%, 2.5∼47.0 %, and 1.0∼6.0 %, respectively. Those values were different along with seasons and stands. The values of organic matter and total nitrogen were high, and pH was low at the upper layer of the sediment. 2. The flora of the sandbar was composed of 38 families, 94 genera, 129 species, 20 varieties, and 2 forma or total 151 taxa. Among them, Pteridophyta was 2 taxa, and Angiospermae was 149 taxa including 50 taxa of Monocotyledoneae and 99 taxa of Dicotyledoneae. Dicotyledoneas was composed of 17 taxa of woody plants and 82 taxa of herbaceous plants. 3. Among herbaceous species, Xanthium strumarium was the dominant species by the importance value of 26.3, and those of Persicaria hydropiper, Miscanthus sacchariflous, and Scirpus triqueter were 24.1, 17.8, and 13.0, respectively. 4. As the result of the association analysis for the herbaceous species, the number of positive correlation for Persicaria hydropiper was highest as 8 times, and that of Bidens frondosa and Xanthium strumarium was 7 times. The number of negative correlation for Scirpus triqueter was highest as 6 times, and that of Hemarthria sibirica and Miscanthus sacchariflorus was 5 times, and Bidens frondosa was 4 times. 5. The species diversity indices for the herbaceous species were different along with the season from 1.305 of November to 1.538 of August. 6. Among 12 Salix species of the sandbar, Salix nipponica was the dominant species, and Salix kangen was subdominant. Salix species were supposed to the pioneer plants at the early stage of the sandbar succession in the investigated area.

관순법에 의한 휜-관 열교환기의 성능 해석

이태환,유충웅 진주산업대학교 1999 論文集 Vol.38 No.-

A cross-flow finned tube heat exchanger was investigated using a tube-by-tube method. The refrigerant R22 flows inside tubes while the air passes outside the finned tube. A self-constructed refrigerant circuitry was adopted. The refrigerant enthalpy at the exit of each tube and the average condensate layer thickness are investigated as a measure of the heat transfer and the observation with the quantity of condensation phenomenon respectively. The dependence of refrigerant enthalpy and the average condensate layer thickness on the refrigerant circuitry was also observed. It was confirmed that this method could be applied to the analysis of finned tube heat exchanger with condensation.

만성 C형 간염 환자에서 페그인터페론 알파2a와 리바비린 병합 치료중 발생한 벨마비 1예

김일환,장제혁,유충헌,최규남,고정해,김윤정,서광원,김지현,박성재,박은택,이연재,이상혁,설상영 인제대학교 2008 仁濟醫學 Vol.29 No.-

페그인터페론과 리바비린 병합요법은 만성 C형 간염의 일차 치료법이다. 저자들은 만성 C형 간염 환자에서 페그인터페론 과 리바비린 병합 요법 중에 발생한 벨마비 1예를 경험하였기에 문헌고찰과 함께 보고하는 바이다. 환자는 5년 전부터 만성 C형 간염을 앓아온 48세 남자이며, PEG-IFN α-2a 135μgm 피하주사 주1회와 하루 1200㎎의 리바비린을 투여하였다. 치료시작 후 9개월째 환자는 오른쪽 안면의 근력약화를 호소하였으며 벨마비로 진단되었다. 페그인터페론과 리바비린 병합요법을 지속하면서 관찰하였다. 환자의 벨마비는 페그인터페론 치료를 중단하지 않았음에도 3개월후 증상이 회복되고 이후 벨마비 재발 없이 현재 경과관찰 중이다. 만성 C형 간염에서 페그인터페론과 리바비린 병합 요법시 벨마비의 발생 가능성을 염두에 두어야 하겠다. A Case of Bell's Palsy Associated with Combination Therapy of Pegylated Interferon Alfa-2a (PEG-IFN) and Ribavirin for Chronic Hepatitis C Virus Infection Pegylated interferon alfa(PEG-IFN α) and ribavirin therapy is the first line treatment for chronic hepatitis C. Mild complications of the therapy are common, but more serious complications are rare. We report here a case of Bell's palsy that occurred in a patient with chronic hepatitis C virus infection during combination therapy of PEG-IFN α-2a and ribavirin. The patient was 49-year-old man with chronic hepatitis C (genotype 1b) for 8 years. He had compensated liver cirrhosis with splenomegaly. Therapy with PEG-IFN α- 2a 135mcg/week and ribavirin 1200mg/day was initiated. After 9 months of the therapy, the patient showed a loss of muscular tone on the right side of his face. A diagnosis of Bell's palsy was made. The Bell's palsy resolved over 3 months despite continuation of the combination therapy.

치료 저항성 환청을 나타내는 만성 정신분열병 환자에서 측두두정부 반복 경두개자기자극의 효과

정경희,최충식,박진수,이규항,함웅,이승환,채정호 大韓神經精神醫學會 2004 신경정신의학 Vol.43 No.5

Objectives : It has been reported that repetitive transcranial magnetic stimulation (rTMS), which stimulate the focal region of brain may relieve auditory hallucination in patient with schizophrenia. This study was aimed to evaluate the effect of rTMS on left and right temporopahetal cortex in schizophrenic patients with treatment-resistant auditory hallucination. Methods : Twenty-six patients with chronic schizophrenia with treatment -resistant auditory hallucination were randomly a1-located to rTMS group on left and right temporoparietal head regions. The rTMS was applied to TP3/4 region by EEG 10-20 international system at 1 Hz for 20 minutes per day for 101reatment days. A Figure of eight TMS coil with a solid core was used for rTMS at 100% of individual motor threshold. Efficacy was evaluated with Auditory Hallucination Rating Scale (HRS), Positive and Negative Symptoms Scale (PANSS), Clinical Global Impression (CGI) Scale on 5 and 10 days of treatment. Results : Ten days administration of l-Hz rTMS to temporopahetal cortex significant improved frequency (p<0.001) and attentional salience (p=0.038) of auditory hallucination, Positive (p<0.001) and negative symptom (p=0.02), and CGI-impro-vement (p<0.001). There were no significant differences between right and left side stimulations. Conclusion : These results suggest that the low frequency rTMS on temporopahetal cortex may be useful in treating Schizo-phrenic patients with treatment-resistant auditory hallucination and it could be a useful novel treatment option.

자동차 차체 다점용접부의 면외변위측정에 관한 연구

차용훈,성백섭,이연신,박영문,김충환 朝鮮大學校 機械技術硏究所 2002 機械技術硏究 Vol.5 No.1

The very few non-contact method are still in the early stage. One of the non-contact methods is by the use of the laser that has high-level of the accuracy for the measurement, and this laser also has excellent characteristics on which many studies for its applications are focused throughout the many fields. The dissertation is on the measurement of the strain caused by the characteristics of the spot welded zone which is used with 3-D ESPI system that is functionally modified through the laser ESPI(Electronic Speckle Pattern Interferometry) system. This system employed the SGCC 1.2t which are mainly used for the steel plate such as automobile, structure, electronics instrument, building material and electronic appliances.

유기용제 취급근로자들의 요중대사물질과 말초임파구 자매염색분체교환 발현빈도에 관한 조사연구

김돈균,황인경,류철인,이수일,정갑열,이용환,이충렬,현원일,김석봉,전용덕 大韓産業醫學會 1990 대한직업환경의학회지 Vol.2 No.1

저자들은 유기용제 취급여성근로자 90명을 대상으로 1988년 7월부터 1989년 8월까지 말초혈액임파구에서의 자매염색분체교환의 발현빈도를 조사하고 이들의 업종, 근속연수, 요중마뇨산 농도등이 자매염색분체교환의 발현빈도에 미치는 영향을 조사하였으며 그 결과를 요약하면 다음과 같다. 1. 유기용제 취급근로자들의 말초혈액임파구에서의 자매염색분체교환의 발현빈도는 대조군에 비하여 유의하게 증가되었다. 2. 말초혈액임파구에서의 자매염색분체교환의 발현빈도가 가장 높은 업종은 프라스틱제품 제조업이었다. 3. 근속연수가 말초혈액임파구에서의 자매염색분체교환의 발현빈도에 미치는 영향은 현저하지 않았다. 4. 요중마뇨산농도와 말초혈액임파구에서의 자매염색분체교환의 발현빈도간에는 유의한 상관관계가 있었다. In order to know the possibility of utilizing the sister chromatid exchanges as an index which could evaluate the effect of organic solvents on the health in industrial workers, the authors studied the effects of the inductivity of sister chromatid exchanges in peripheral lymphocytes from 90 female workers expoxed to organic solvents and 20 non-exposed female workers. The results obtained were as follows : 1. The frequency of sister chromatid exchanges in peripheral lymphocytes from 90 female workers exposed to organic solvents was significantly increased in comparison with 20 control subject. 2. The frequency of sister chromatid exchanges was significantly increased in the workers who were employed in the manufacture of plastic materials than the other manufactures. 3. There were no significant differences in the frequency of sister chromatid exchanges by carriers of the exposed workers.

뇌하수체 종양 제거술 시행 후 뒤늦게 발생한 횡문근 융해증과 동반된 중추성 열

장제혁,최규남,김일환,노은지,김윤정,유충헌,고정해,박봉수,김태균,권민정,이순희,박정현 인제대학교 2008 仁濟醫學 Vol.29 No.-

Body temperature is controlled by thermoregulatory center of the hypothalamus. We report a case of 24 years old man with central fever. He was subjected to a partial excision of pituitary tumor compressing optic chiasm four years ago. He has received hormonal therapy for panhypothyroidism after removal of pituitary tumor. And He received gamma knife operation for partially contrast-enhancing masses in suprasellar and both hypothalamic areas that is probably postoperatively remnant or recurrent tumor of pituitary adenoma. One year after gamma knife operation, he presented with a febrile syndrome of unknown origin including rhabdomyolysis. All usual investigations proved negative. We diagnosed him as central fever with rhabdomyolysis. He received medical ICU care with cooling bed, ice pack. And his symptom improved. Postoperative hyperthermia may result following resection of the pituitary tumor. When central fever is suspected taking note of past history, a quick recognition of course of fever can help reduce the using of unnecessary antibiotics and hospital stay.

Anti-inflammatory effects of Athyrium yokoscense extract via inhibition of the Erk1/2 and NF-κB pathways in bisphenol A-stimulated A549 cells

Lee Jung-Kyu,Choi Won Seok,Song Jin Yong,Kwon Oh Seong,Lee Yeon Jin,Lee Jong Seok,Lee Sarah,Choi Se Rin,Lee Choong Hwan,Lee Ji-Yun 한국독성학회 2023 Toxicological Research Vol.39 No.1

Bisphenol A is an environmental endocrine disruptor that has similar functions to estrogen in humans. However, few studies have investigated pulmonary inflammation induced by BPA, and the effect of Athyrium yokoscense extract on this inflammatory response is unknown. In this study, we investigated this effect in A549 human alveolar epithelial cells. BPA at concentrations higher than 100 μM were cytotoxic to A549 cells at 24 and 48 h after treatment; however, AYE (100 μg/mL) had a protective effect against BPA-induced cytotoxicity. AYE also inhibited the generation of intracellular reactive oxygen species, expressions of cyclooxygenase-2 and extracellular signal-regulated kinase1/2 proteins, activities of phospholipase A2, COX- 2, nuclear factor kappa-light-chain-enhancer of activated B cells, and proinflammatory mediators including prostaglandin E2, tumor necrosis factor-α, and interleukin-6 induced by BPA in A549 cells. This study demonstrated that BPA, which induces chronic lung disease, causes oxidative stress and inflammatory response in lung epithelial cell line, and found that AYE reduces BPA-induced oxidative stress and inflammatory response by down-regulating the Erk1/2 and NF-κB pathways.

Effect of Sesbania Incorporation as Nitrogen Source on Growth and Yield of Whole Crop Barley and Reduction of N Fertilizer in Saemangeum Reclaimed Tidal Land

Su-Hwan Lee,Hui-Su Bae,Yang-Yeol Oh,Sang-Hun Lee,Yeong-Joo Kim,Sun Kim,Jin-Hee Ryu,Kang-Ho Jung,Choong-Geun Lee,Jae-Hyeon Kim,Yeong-Doo Kim,Weon-Young Choi,Jae-Yeong Cho,Kyoung-Bo Lee,Keon-Hui Lee,Ki- 한국토양비료학회 2016 한국토양비료학회지 Vol.49 No.6

It is known that the poor soil fertility of newly reclaimed saline soils is due to the lack of organic matter and available mineral nutrients for crop production. The effect of green manuring with Sesbania aculeata in combination with five rates of urea-N treatments (N0. N25, N50, N75, N100) on the productivity of a subsequent whole-crop barley and the fertility of the reclaimed saline soil in Saemangeum was evaluated in the field during 2013-2014 growing season. Sesbania was grown during summer season (June to October). The amount of Sesbania incorporated was 16.2 Mg ha<SUP>-1</SUP>. Sesbania contributed to 393 kg N ha<SUP>-1</SUP> to the soils when ploughed down and incorporated before whole-crop barley cultivated. The performances of whole-crop barley following sesbania incorporation were significantly affected by a combination of Sesbania manuring and different N rates. The N fertilizer equivalence without N fertilizer following Sesbania was 42.6% (63.9 kgN ha<SUP>-1</SUP>), compared with N100(150 kg N ha<SUP>-1</SUP>) in fallow soils. The whole-crop barley yield responded to N fertilizer rates in both sesbaniaamended and fallow soil. The yield response to nitrogen rates in fallow soil was linear (Y=0.0586X+3.3011, R<SUP>2</SUP> =0.9534), whereas that in sesbania-amended soils was quadratic (Y= -0.001X<SUP>2</SUP>+0.1322X+5.7143, R<SUP>2</SUP>=0.9576). The yield of whole-crop barley in sesbania-amended with increasing N rates was increased up to SN75 (115 kgN) 10.3 Mg ha<SUP>-1</SUP>. Apparent N recovery (ANR) of whole-crop barely showed decreased with sesbania plus increasing rates of N fertilizer. Despite higher yield with sesbania manuring plus increasing N rates, the contributions of N from Sesbania with increasing N rates to whole-crop barley were decreased, whereas those from fertilizer increment due to excessively mineralized Nitrogen. Considering yield, ANR, N contribution from Sesbania and nitrogen fertilizer, the optimum N rate was N50 rate following sesbania incorporation.

Regulation of m-Calpain Activity by α-Synuclein and Its C-terminal Fragment (α-syn61-140)

Lee, In-Hwan,Kim, Hyun-Jin,Lee, Choong-Hwan,Paik, Seung R. Korean Chemical Society 2006 Bulletin of the Korean Chemical Society Vol.27 No.7

The m-calpain activity hydrolyzing a fluorogenic substrate of N-Succinyl-Leu-Leu-Val-Tyr-7-amino-4-methylcourmarin (LLVY-AMC) was significantly stimulated by more than two-fold in the presence of 5$\mu$M $\alpha$synuclein at $15{^{\circ}C}$. The stimulation was also confirmed with azocasein. The stimulation of the peptide hydrolyzing activity required structural intactness of $\alpha$-synuclein since the C-terminally or N-terminally modified proteins such as $\beta$-synuclein, $\alpha$-syn1-97, and $\alpha$-syn61-140 did not increase the proteolytic activity. Instead, however, the N-terminally truncated $\alpha$-syn61-140 was shown to drastically suppress the calpain activity. Since the N-terminal truncation was known to be the primary cleaving event of calpain-mediated proteolysis of $\alpha$-synuclein and the $\alpha$-syn61-140 has been demonstrated to be resistant against the calpain digestion, it has been proposed that the intracellular calpain activity could be regulated in a reciprocal manner by $\alpha$-synuclein and its proteolyzed C-terminal fragment. Based on the results, a possible physiological function of $\alpha$-synuclein has been suggested as a calpain regulator which contains both stimulatory and inhibitory activities.