한국 국립공원 산림생태계의 수목 탄소저장량 평가

이상진,박홍철,박관수,김현숙,이창민,김진원,심규원,최승운,Lee, Sang-Jin,Park, Hong-Chul,Park, Gwan-Soo,Kim, Hyoun-Sook,Lee, Chang-Min,Kim, Jin-Won,Sim, Gyu-Won,Choi, Seung-Woon 한국환경복원기술학회 2022 한국환경복원기술학회지 Vol.25 No.3

The purpose of this study is to quantitatively evaluate the amount of carbon storage for trees in forest ecosystem to support the foundation for carbon neutrality implementation in Korea National Park. It targeted 22 national parks designated and managed as national parks in Korea, and conducted research on forest trees in the terrestrial ecosystem among various natural and ecological carbon sink. The survey and analysis method followed the IPCC guidelines and the National Greenhouse Gas Inventory in Korea. The amount of tree carbon storage in the forest ecosystem of Korea National Park was confirmed to be about 218,505 thousand CO₂-ton and the amount of carbon storage per unit area was 570.8 CO₂-ton per hectare. Compared to 299.7 CO₂-ton per hectare, the average carbon storage per unit area of the entire Korean forest, it was found that about twice as much carbon was stored when assuming the same area. In other words, it means that the tree carbon storage function of the national park is about twice as high as that of the average tree carbon storage function of entire Korean forest. It has great implications in Korea National Park not only provides biodiversity promotion and exploration services as a national protected area, but also performs excellent functions as a carbon sink.

Effect of Ionizing Radiation on Rat Tissue: Proteomic and Biochemical Analysis

Park*, Eui‐,Chul,Yoon, Jong‐,Bok,Seong*, Jin‐,Sil,Choi, Kyoung‐,Soo,Kong, Eung‐,Sik,Kim, Yun‐,Jeong,Park, Young‐,Mee,Park, Eun‐,Mi Taylor Francis 2006 Preparative biochemistry & biotechnology Vol.36 No.1

<P>Reactive oxygen species (ROS), generated by ionizing radiation, has been implicated in its effect on living tissues. We confirmed the changes in the oxidative stress markers upon irradiation. We characterized the changes in the proteome profile in rat liver after administering irradiation, and the affected proteins were identified by MALDI-TOF-MS and ESI-MS/MS. The identified proteins represent diverse sets of proteins participating in the cellular metabolism. Our results demonstrated that proteomics analysis is a useful method for characterization of a global proteome change caused by ionizing radiation to unravel the molecular mechanisms involved in the cellular responses to ionizing radiation.</P>

小白山 森林構造에 關한 硏究(Ⅰ) : 海拔高에 따른 泉洞溪谷의 植生構造를 中心으로

辛壽哲,金昌浩,朴敎秀 동국대학교 생명자원과학대학 연습림 1993 연습림논문집 Vol.- No.3

Cheon­Dong valley forest, bearing a cool­temperature, broadleaf­deciduous forest zone, ranging from 500m to 1200m by elevation in Mt. Sobeak National Park area was investigated for forest vegetation structure research. Ten plots of 1000㎡ size set up by the clumped sampling method and Classification and Polar Ordination were applied for vegetation structure analysis by environmental gradient the flora of the vascular plants collected from this investigated area were 32 families, 35 genera, 42 species and 3 varieties. Ranging from 500m to 1200m to elevation, Number of species, Number of individuals and Species diversity showed their highest values at 900m elevation respectively. And with increasing altitude those all values showed a tendency decreasing gradually. According to the Importance Value the leading dominant tree species in canopy layer were Styrax obassia, Quercus variabilis, Q. aliena, Carpinus codata while Lindera obtusiloba, Lespedeza bicolor were in understory at low elevation, ranging from 500m to 900m. Ant at high elevation area, ranging from 900m to 1200m, the leading dominant species were Q. monglica, Q. acutisima, Betula platyphylla var. japonica, Cornus controversa, Acer pseudo­sieboldianum, Fraxinus mandshurica, n canopy layer while Deuzia paviflora, Pinus laxiflora were in understory. The result from Classification and Polar Ordination analysis, they showed similarity that the forest vegetation of Sobeak valley area was classified into two sub­communities, one is Q. mongolica, Styrux obassia―Styrux obassia, Q. aliena, Carpinus codata―Styrux obassia, Lespedeza bicolor community and the other is Q. variabilia, Q. acutisima―Acer mono, Fruxinus rhynchophylla―Deutzia parviflora, Lindera obtusiloba community and the major environmental factors were considered to be the difference of altitude and the conditions of soil pH. The successional trends of tree species will be from Q. variabilis, Q. acutisima through Acer pseudo­sieboldianum, Fraxinus rhynchophylla to Carpinus codata at high elevation area, ranging from 900m to 1200m, and from Q. mongolica, Styrax obassia through Styrax obassia, Q aliena to Carpinus codata at low elevation area, ranging from 500m to 900m.

人蔘이 自然發生高血壓쥐에 있어서 血壓 및 血漿 Renin 活性度에 미치는 影響에 關한 實驗的 硏究

孫宜錫,朴陞哲,許鳳烈,李禎均,林憲吉,咸駿洙,梁忠模,韓哲洙,朴贊雄,金海中 대한의학협회 1979 대한의학협회지 Vol.22 No.9

Soil characteristics of the Abies koreana communities at Korean national parks: focusing on Sobaeksan, Deogyusan, Jirisan National Parks

Chang Min Lee,Sang Jin Lee,Gwan Soo Park,Hyoun Sook Kim,Hong Chul Park 충남대학교 농업과학연구소 2022 Korean Journal of Agricultural Science Vol.49 No.2

당뇨병 환자에서 혈장 Thrombin-Antithrombin Ⅲ 및 Plasmin-α_2-Plasmin Inhibitor 복합체의 임상적 의의

김경욱,김은숙,정상수,윤수지,박우일,이준희,남수연,안철우,문병수,김경래,차봉수,송영득,임승길,이현철,허갑범 대한당뇨병학회 2002 Diabetes and Metabolism Journal Vol.25 No.5

연구배경:당뇨병 환자에서 혈액응고 및 섬유소용해 체계의 이상경향이 있어 그 결과로 여러 혈관합병증의 발생위험이 높다는 사실은 널리 알려져 있다. 그 기전은 아직 확실히 밝혀지지 않았으나, 고혈당으로 인한 혈장 단백질들의 비효소성 당화작용이나 산화성 스트레스로 인한 유리 라티칼 작용으로 응고항진이나 섬유소용해 활성의 저하를 유발하는 것으로 생각되고 있다. 최근 응고 및 용해인자와 그 억제자의 복합체들의 증가가 이 상태를 비교적 예민하게 반영한다고 알려져 있다. 방법:본 연구에서는 당뇨병 환자 101명과 정상 대조군 20명에서 혈장내 thrombin­antithrombin complex(TAT)와 plasmin­α₂­plasmin inhibitor complex(PIC)를 측정하여 비교하고, 당뇨병 환자에서 미세혈관 합병증과 대혈관합병증의 유무에 따른 차이와, 이미 혈관 질환의 위험인자로 알려져 있는 인자들간의 상관성을 알아보고자 하였다. 결과:1. 환자의 분포를 살펴보면 혈관합병증이 있는 군은 85명, 혈관합병증이 없는 군은 16명이었고, 평균연령은 각각 57.9±14.1세, 49.9±16.6세로 혈관 합병증이 있는 군에서 더 나이가 많았고, 체질량지수는 23.2±3.4㎏/㎡, 24.1±3.4㎏/㎡로 두 군간 유의한 차이는 없었다. 또 두 군간의 혈압 및 HbA1c, 공복혈당 및 인슐린과 C­peptide, 총 콜레스테롤, 중성지방, HDL­콜레스테롤, Lp⒜는 유의한 차이가 없었고, 미세혈관합병증이 있는 군에서 당뇨병의 유병기간이 길었다. 2. TAT 및 PIC의 농도는 정상 대조군에서는 2.8±1.2 ng/mL, 240.4±69.7 ng/mL이었고, 당뇨병 환자군에서는 9.5±22.6 ng/mL, 472.2±258.7 ng/mL이었다. TAT와 PIC 모두 당뇨병 환자군에서 정상 대조군에 비해 유의하게 증가되어 있었고(p<0.001), TAT/PIC ratio는 두 군간 차이가 없었다. 3. 당뇨병 환자의 혈관합병증에 따른 TAT 및 PIC, fibrinogen 농도는 합병증이 없는 군은 각각 4.1±2.4ng/mL, 362.2±272.0ng/mL, 322.7±102.4mg/mL으로 PIC와 fibrinogen의 증가를 보였으나, 연령을 보정한 후에는 통계학적 유의성은 없었다. 또 대혈관 합병증군에서는 각각 6.0±4.9 ng/mL, 507.4±321.6 ng/mL, 427.1±194.7 mg/dL이었으며 미세·대혈관 합병증군에서는 10.4±6.4 ng/mL, 484.8±269.7 ng/mL, 388.4±132.4 mg/dL으로 TAT의 증가를 보였으나 역시 연령을 보정한 후에는 통계학적 유의성은 없었다. 4. 미세혈관합병증군에서 HbA1c(>8%)가 높은 군의 PIC 농도가 유의하게 높았고(p=0.049), 대혈관합병증군에서 HbA1c(>8%)가 높은 군의 총 콜레스테롤 농도가 유의하게 높았다(p=0.042). 5. 총 당뇨병 환자군에서 PIC는 fibrinogen과 HbA1c와 양의 상관관계를, BMI와 음의 상관관계를 보였으며(r=0.47, 0.31,-0.25), 혈관 합병증이 없는 당뇨병 환자군에서만 TAT는 HbA1c와 양의 상관관계를 보였다(r=0.67). 결론:이상의 결과에서 혈장 TAT 및 PIC 농도는 당뇨병 환자에서 정상 대조군에 비해 의미있게 증가되어 있었고, 당뇨병 환자군에서는 연령의 증가와 유병기간이 혈액응고항진 및 용해의 장애에 큰 역할을 함을 알 수 있었으며, 총 당뇨병 환자군에 PIC와 HbA1c와 양의 상관관계를, BMI와 음의 상관관계를 보였으며 혈관 합병증이 없는 당뇨병 환자군에서만 TAT는 HbA1c와 양의 상관관계를 보였다. 따라서 당뇨병 환자에서 혈액응고 및 용해의 장애가 동반되어 있다고 볼 수 있으며, 혈장 TAT 및 PIC는 혈관합병증으로의 진행을 예측하는 지표로서 유용하리라 생각된다. 또 혈당조절정도와 상관성이 있으므로 혈당조절후에 추적검사를 시행하여 합병증의 예방이 가능한지 추후 연구가 필요하리라 생각된다. Background : Abnormality of coagulation and fibrinolystic system is known as a predisposing factor of vascular complication in diabetes. Although the pathogenesis is not well known, non-enzymatic glycation reaction and the increase in production of free radicals due to an increased oxidative stress may be linked to the hypercoagulibility and hypofibrinolytic activity. As indices of abnormality in coagulation and firinolysis in peripheral blood, plasma thrombin-antithrombin Ⅲ complex (TAT) and plasmin-α_2-plasmin inhibitor complex (PIC) were measured. The purpose of this study was to clarify whether hypercoagulability exists in diabetic patients with or without vascular complication. Methods : In our study, we measured plasma thrombin-antithrombin Ⅲ compelx (TAT) and plasmin-α_2-plasmin inhibit or complex (PIC) in 101 diabetic subjects and 20 controls. Comparing TAT and PIC levels in diabetic microvascular complication group, diabetic macrovascular complication group and controls, we examined correlation between risk factors associated with diabetic vascular complication. Results : 1. The group with diabetic vascular complication was older than group without complication. There was no significant difference in BMI, blood pressure, HbA_ic, blood sugar level, insulin, C-peptide, serum creatinine, total cholesterol, triglyceride, HDL-cholesterol, Lp (a) between two groups. The group with diabetic microvascular complication had longer duration of diabetes. 2. Concentration of TAT and PIC were 2.8±1.2 ng/ mL, 240.4±69.7 ng/ mL in controls and 9.5±22.6 ng/ mL, 472.2±258.7 ng/ mL in diabetic patients, respectively. TAT and PIC were significantly higher in diabetic patients than in control (p<0.001). But TAT/PIC ratio was no significant difference between two groups. 3. In diabetic patients, concentration of TAT and PIC and fibrinogen were respectively 4.1±2.4 ng/ mL, 362.2±272.0 ng/ mL, 322.7±102.4 mg/ dL in group without vascular complication and 5.3±4.1 ng/ mL, 529.5±258.7 ng/ mL, 374.9±106.2 mg/ dL in group with microvascular complication, which group had increase in PIC and Fibrinogen but no significance after correction of age. Concentration of TAT and PIC and Fibrinogen were 60.±4.9 ng/ mL, 507.4±321.6 ng/ mL, 427.1±194.7 mg/ dL in macrovascular complication, and 10.4±6.7 mg/ mL, 484.8±269.7 ng/ mL, 388.4±132.4 mg/ dL in combined vascular complication which group showed increase of TAT but also had no significant increase after correction of age. 4. In diabetic microvascular complication patients, group of high HbA_1c (>8%) (p=0.049) had significant high PIC concentration. In diabetic macrovascular complication patients, group of high HbA_1c (>8%) (p=0.042) had significant high total cholesterol concentration. 5. In all diabetic patients, PIC was positively correlated with fibrinogen and HbA_1c and negatively correlated BMI (r=0.47, 0.31, -0.25). Only in daibetic patients without angiopathy, TAT was positively correlated with HbA_1c (r=0.67). Conclusion : In this study, plasma TAT and PIC concentration significantly increased in diabetic patients compared with controls, and PIC was increased in group with microvascular complication, TAT were increased in group with combined micro macrovascular complication. However, there was no significance relationship existed when correctinf for age. PIC was correlated with HbA_1c. TAT was correlated with HbA_1c only in the group without angiopathy. Abnormality of coagulation and fibrinolysis were combined in diabetes, plasma TAT and PIC can be used as an index of vascular complication. Also we found the correlation with the degree of the blood glucose control. Therefore we need follow up study for the possibility of prevention of vascular complication after controlling the blood glucose to age-matched patients (J Kor Diaabetes Asso 25:354~363, 2001).

관동맥질환에서 저밀도 지단백 입자 크기의 분포

임효영,김인숙,승기배,강동헌,전두수,장기육,박준철,이수영,홍순조,최규보 대한순환기학회 1998 Korean Circulation Journal Vol.28 No.8

한국인 직무 스트레스 측정도구의 개발 및 표준화

장세진,고상백,강동묵,김성아,강명근,이철갑,정진주,조정진,손미아,채창호,김정원,김정일,김형수,노상철,박재범,우종민,김수영,김정연,하미나,박정선,이경용,김형렬,공정옥,김인아,김정수,박준호,현숙정,손동국 大韓産業醫學會 2005 대한직업환경의학회지 Vol.17 No.4

Background and Purposes: Over the past three decades, numerous studies performed in Korea have reported that job stress is a determinant risk factor for chronic diseases and work disability. Every society has its own culture and occupational climate particular to their organizations, and hence experiences different occupational stress. An occupational stress measurement tool therefore needs to be developed to estimate it objectively. The purpose of this study is to develop and standardize the Korean Occupational Stress Scale (KOSS) which is considered to be unique and specific occupational stressors in Korean employees. Subjects and Methods: Data were obtained from the National Study for Development and Standardization of Occupational Stress (NSDSOS Project: 2002-2004). A total of 12,631 employees from a nationwide sample proportional to the Korean Standard Industrial Classification and the Korean Standard Occupational Classification were administered. The KOSS was developed for 2 years (2002-2004). In the first year, we collected 255 items from the most popular job stress measurement tools such as JCQ, ERI, NIOSH and OSI, and 44 items derived from the a qualitative study (depth interview). Forty-three items of KOSS, in the second year, were retained for use in the final version of the KOSS by using Delphi and factor analysis. Items were scored using conventional 1-2-3-4 Likert scores for the response categories. Results: We developed eight subscales by using factor analysis and validation process: physical environment (3 items), job demand (8 items), insufficient job control (5 items), interpersonal conflict (4 items), job insecurity (6 items), organizational system (7 items), lack of reward (6 items), and occupational climate (4 items). Together they explained 50.0% of total variance. Internal consistency alpha scores were ranged from 0.51 to 0.82. Twenty-four items of the short form of the KOSS (KOSS-SF) were also developed to estimate job stress in the work setting. Because the levels of the subscales of occupational stress were gender dependent, gender-specific standard norms for both the 43-item full version and the 24-item short form using a quartile for the subscales of KOSS were presented. Conclusion: The results of this study suggest that KOSS might be an appropriate measurement scale to estimate occupational stress of Korean employees. Further and more detailed study needs to be conducted to improve the validity of this scale.

블록펄스 함수를 이용한 변압기의 여자돌입검출에 관한 연구

박철원,김수경,신명철 成均館大學校 科學技術硏究所 1996 論文集 Vol.47 No.1

In the differential protection scheme for large power transformer, it must restrain the tripping on magnetizing inrush condition. The conventional methods has used harmonic restraints by digital filters that include much computational burden and require the sampling rate to be an power of 2. This paper deals with detection scheme of the magnetizing inrush for power transformer by extract wanted frequency components using one of the orthogonal function sets called Block Pulse Function. The proposed method is tested using Salford EMTP output relaying signals of the model power system. The results are compared with those of algorithm based DFT, and then its method shows good response and speed.

분만시 지속적 또는 간헐적 투여에 의한 경막외 제통의 비교

박욱,이은찬,배상철,강규식,곽수달 순천향의학연구소 1997 Journal of Soonchunhyang Medical Science Vol.3 No.2

Background : Continuous epidural infusion of the mixed solution of local anesthetic (bupivacaine) and lipid-soluble opioid (fentanyl) has known as a more useful method than intermittent epidural injection for relief of pain during labor. The purpose of this study was to compare a clinical usefulness between continuous infusion and intermittent injection with epidural analgesia during labor. Methods: One hundred healthy parturients were divided into two groups as follows: Continuous epidural group (C-group); 50 parturients received epidural analgesia continuously with 0.167% bupivacaine and 0.000167% fentanyl in the speed of 10 ml h-1 at cervical dilatation (3-5 cm) and then injected 0.25% bupivacaine 5 ml additionally at complaints of severe labor pain. Intermittent epidural group (I-group); 50 parturients received inermittently 0.167% bupivacaine and 0.00083% fentanyl in the initial dose of 12 ml at cervical dilatation (3-5 cm) and then additionally used the same dose at severe labor pain. Result: There were no statistically significant differences in the clinical states of maternoneonate, pain free score, degree of motor block, mode of delivery, cause of Cesarean section, neonatal Apgar score and incidence of side effects between groups(Table 1.2.3.7.8). The total dose of bupivacaine and fentanyl, the duration of lst and 2nd delivery stages and the frequency of top up injection for incomplete relief of pain during labor appeared significant differences in statistics between groups (Table 4.5.6). Conclusion: It was similar to the effectiveness of maternal epidural analgesia during labor between groups by means of continuous or intermittent injection.