건조스트레스에 따른 옥상녹화 식물의 생리적 반응

박성식,최재혁,박봉주,Park, Seong-Sik,Choi, Jaehyuck,Park, Bong-Ju 한국조경학회 2017 韓國造景學會誌 Vol.45 No.2

본 연구는 저관리 경량형 옥상녹화를 위해 맥문동, 울릉국화, 비비추, 돌나물, 잔디의 내건성을 평가하였다. 옥상녹화 식물의 내건성 평가를 위해 용적수분함량, 엽과 토양의 수분포텐셜, 엽록소 a와 b함량, 엽록소형광, 광합성율, 기공전도도, 증산속도, 항산화물질을 측정하였다. 옥상녹화 식물의 내건성 측정결과, 무관수 일수가 경과하면서 용적수분함량 부족에 따라 식물은 점차 고사하는 경향을 보였다. 울릉국화가 가장 먼저 고사하였으며, 그 다음으로 잔디, 비비추, 맥문동 순이었으며, 돌나물은 고사하지 않았다. 비비추, 맥문동, 돌나물은 3주 이상 생존하여 내건성이 높은 식물로 판단되었다. 엽록소 a와 b는 두 가지 유형이 나타났는데, 초기부터 중기까지 일정한 함량을 유지 후, 급격히 감소하는 I유형에는 비비추, 잔디와 초기에는 낮은 함량을 보이다가 중기 때 급격히 증가 후, 감소하는 II유형에는 울릉국화, 맥문동, 돌나물로 구분되었다. 용적수분함량과 증발산량은 모든 식물 종에서 지속적으로 감소하였으며, 엽록소형광 측정결과, 내건성이 상대적으로 높은 돌나물이 가장 늦게 감소하였고, 잔디와 돌나물은 급격한 감소가 나타난 후 고사하였다. 광합성, 기공전도도, 증산속도는 초기에 높은 활성도가 나타났으나, 용적수분함량의 감소로 인하여 식물체가 기공을 닫아 낮아지는 경향을 보였다. 항산화물질 측정결과, 건조스트레스가 증가하면 항산화물질의 양 또한 증가하나, 높은 스트레스가 유지되면 이러한 화합물이 지속적으로 소비되므로, 항산화물질의 증감은 내건성 평가 지표로 사용할 수 있을 것으로 판단된다. This study evaluated the drought tolerance of Liriope platyphylla F.T.Wang & T.Tang, Dendranthema zawadskii var. lucidum (Nakai) J.H.Park, Hosta longipes (Franch. & Sav.) Matsum., Sedum sarmentosum Bunge and Zoysia japonica Steud. for an extensive green roof. In order to assess drought tolerance of green roof plants, several criteria were measured such as volumetric water content, leaf and soil moisture potential, chlorophyll a and b, chlorophyll fluorescence, photosynthesis, stomatal conductance, transpiration rate and antioxidants. The results of the drought tolerance measurement of green roof plants focused on the gradually withering of plants from lack of volumetric water content. D. zawadskii was the first to show an initial wilting point, followed by Z. japonica, H. longipes and L. platyphylla in order while S. sarmentosum showed no withering. It was concluded that H. longipes, L. platyphylla and S. sarmentosum were highly drought tolerant plants able to survive over three weeks. Furthermore, chlorophyll a and b were divided into two types: Type I, which kept regular content from the beginning to the middle of the period and suddenly declined, like H. longipes and Z. japonica; and Type II, which showed low content at the beginning, sharply increased at the middle stage and decreased, like D. zawadskii, L. platyphylla and S. sarmentosum. Volumetric water content and the amount of evapotranspiration consistently declined in all plant species. The analysis of chlorophyll fluorescence results that S. sarmentosum, which had relatively high drought tolerance, was the last to decline, while Z. japonica and S. sarmentosum withered after rapid reduction. At first, photosynthesis, stomatal conductance and transpiration rate showed high activity, but they lowered as the plant body closed stomata owing to the decrease in volumetric water content. Measuring antioxidants showed that when drought stress increased, the amount of antioxidants grew as well. However, when high moisture stress was maintained, this compound was continuously consumed. Therefore, the variation of antioxidants was considered possible for use as one of the indicators of drought tolerance evaluation.

해체공사 실무자를 위한 기계식 해체대상 RC구조물의 해석기법 제안

박성식,이범식,박지영,김효진,손창학,Park, Seong-Sik,Lee, Bum-Sik,Park, Ji-Young,Kim, Hyo-Jin,Sohn, Chang-Hak 한국토지주택공사 토지주택연구원 2011 LHI journal of land, housing, and urban affairs Vol.2 No.4

우리나라의 RC 구조물 기계식 해체공사에서는 적절하지 못한 해체장비의 선정과 탑재가 원인이 되어 해체작업 중 구조부재가 붕괴하는 사고가 발생하기도 한다. 따라서 RC 구조물의 기계식 해체공사를 계획할 때 해체공사 담당자가 대상 구조물에 탑재 가능한 장비의 등급을 보다 편리하게 결정할 수 있는 해석기법이 필요한 실정이다. 이 논문에서는 4층 규모 실 구조물을 대상으로 재하실험과 구조해석을 수행하여, 선행연구에서 도출한 RC 구조물에 탑재 가능한 장비 등급의 적정성을 규명하고, 해체공사 담당자가 구조물의 안전성을 편리하게 평가할 수 있는 해석기법을 제안하였다. 이 연구에서 제안한 해석기법은 RC구조물 기계식 해체공사의 작업 안전성과 적정한 장비 운영을 통한 작업 효율성 향상에 유용하게 활용될 수 있을 것으로 사료된다. In domestic mechanical demolition work against RC building, unsuitable selection and loading of heavy equipment have led to occasional accidents such as collapse of structural members during the work. Therefore, proper analysis technique to easily decide allowable equipment load on the structure is needed at the planning stage of mechanical demolition work. In this paper, performing loading test and elastic analysis against 4-story building at full scale, we confirm appropriateness for allowable load of equipment on RC structures, which was suggested in previous study, and suggest structural analysis method that can evaluate safety of RC building during the mechanical demolition. The suggested method can be effectively utilized to improve work efficiency through safety of mechanical demolition work against RC building and proper management of equipments.

질의응답 Q&A - 해저사면 내 매장된 가스하이드레이트는 무엇이며 이것이 해리되는 경우 지반내 형성된 공극이 강도에 미치는 영향은?

박성식,Park, Seong-Sik (사)한국토질및기초기술사회 2010 지반과 기술 Vol.7 No.2

분별해체 관련정책 및 기술개발 현황

박성식,이도헌,Park, Seong-Sik,Lee, Do-Heun 한국건설순환자원학회 2009 한국건설순환자원학회지 Vol.4 No.4

태음인(太陰人) 한다열소탕(寒多熱少湯)과 가미한다열소탕(加味寒多熱少湯)의 효능(效能)에 대(對)한 실험적(實驗的) 연구(硏究)

박성식,Park, Seong Sik 사상체질의학회 1992 사상체질의학회지 Vol.4 No.1

In order to investigate experimentally the effects of Taeumin Handayolsot'ang and Gamihandayolsot'ang, experimental studies were conducted about antipyretic effect, analgesic effect, antiinflammatory effect of edema, sadative effect, anticonvulsive effect experimental animals (mice and rats). Sample A group was a solid extract of Handayolsot'ang treated group. Sample B group was a solid extract of Gamihandayolsot'ang treated group. The results were summarized as fallows. 1. In antipyretic action by yeast method, sample A group was decreased significantly and sample B group showed decreasing tendency, but showed no significance. 2. In the effect of control for writhing syndrome by the acetic acid stimulating method, sample B group was repressed significantly and sample A group showed repressing tendency, but showed no significance. 3. Antiinflammatory action by carrageenine edema method was showed significant effect at all sample groups. 4. Sadative effect by rotor rod method in rats was not noted at all sample groups. 5. In anticonvulsive action by E C T unit method, time to death in mice was significantly prolonged at all sample groups. According to the above results, it is considered that Taeumin Handayolsot'ang and Gamihandayolsot'ang will be effective on pyretic diseases.

대경권 셰일 비탈면 현장 재하실험

박성식,남정일,김칠환,홍순표,유철호,예성렬,Park, Seong-Sik,Nam, Jeong-Il,Kim, Chil-Hwan,Hong, Sun-Pyo,Yu, Cheol-Ho,Ye, Seong-Ryeol 한국지반공학회 2015 지반 : 한국지반공학회지 Vol.32 No.1

빠를수록 좋은 우리 아이 성교육

박성식,Park, Seong-Sik 한국건강관리협회 2008 건강소식 Vol.32 No.3

어린 아이들에게 성교육이 필요하다고 이야기 한다면, 당신은 어떻게 받아들이겠는가. '아이의 성교육'이란 말 자체를 거론하기 전에 부모의 성의식부터 올바로 가져야 할는지도 모르겠다. 그만큼 성은 금기라는 울타리 안에서 마땅히 알아야 할 것조차 쉬쉬함으로써 여러 부작용을 낳았고 그것이 대물림되고 있다는 게 현대 성의식을 진단하는 전문가들의 견해다.

신축본(辛丑本) "동의수세보원(東醫壽世保元)" 처방(處方)에 관한 연구(硏究)

박성식,한경석,Park, Seong-Sik,Han, Kyung-Suk 사상체질의학회 2002 사상체질의학회지 Vol.14 No.3

1. Purpose We can find the Newly created prescriptions of ShinChukBon DongyiSuseBowon which is not described at the Discourse on the Constitutional Symptoms and Diseases and still more not exist symptom in charge. And some of prescriptions of Discourse on the Constitutional Symptoms and Diseases is not described the composition. So how can we understand that prescriptions is the purpose of research. 2. Methods All the prescription of ShinChukBon DongyiSuseBowon is analyzed by many directions and compared with early books which is DongyiSuseBowonSasangChoBonKywun, GaBoBon DongyiSuseBowon etc. 3. Result and Conclusion We can find the analysis of prescriptions of ShinChukBon DongyiSuseBowon as follows. All prescriptions can't be make clear the base of the Discourse on the Constitutional Symptoms and Diseases as only ShinChukBon DongyiSuseBowon. And that is made at the different period More research is need that how can we understand the Newly created prescriptions which is not described at the Discourse on the Constitutional Symptoms and prescriptions of Discourse on the Constitutional Symptoms and Diseases which is not described the composition. So we must expain again in view of the varies period.

포커스 - '12년 수해복구사업 추진지침(안) 주요 개선

박성식,Park, Seong-Sik 한국방재협회 2012 방재저널 Vol.14 No.2

공압식 심실 보조기의 동물실험

박성식,김삼현,서필원,최창휴,이상훈,이혁수,황승옥,안혁,Park, Seong-Sik,Kim, Sam-hyun,Seo, Pil-won,Choi, Chang-hyu,Lee, Sang-hoon,Lee, Hyuk-soo,Hwang, Seung-ok,Ahn, Hyuk 대한흉부심장혈관외과학회 1999 Journal of Chest Surgery (J Chest Surg) Vol.32 No.12

Background : Ventricular assist devices(VADs) are being used for patients in postcvardiotomy cardiogenic shock status bridge to cardiac transplant settings and in post-myocardial infarction cardiogenic shock. The VAD which was developed at the Deparment of medical engineering in Dankook University College of Medicine was a pneumatically driven device and can maintain pulsatile flow. The goal of this study is to develop animal experimental models using the VAD and to clarify the reliability and hemodynamic property adequacy of end organ perfusion durability and severity of thrombotic-hemolytic tendency of the device. Material and Method : The pneumatic VAD was applied to 8 adult female lambs, We examined some hemodynamic parameters such as arterial blood pressure pulmonary capillary wedge pressure(pcwp) pulmonary artery pressure(PAP) left atrial pressure hour urine output cardiac index VAD flow EKG to determine the reliability of the VAD and hemodynamic compatibility of the experimental animals within 24 hours of experiment. We also observed the end organ perfusion durability of the VAD and thrombotic-hemolytic property of the VAD after 24 hours of VAD insertion. Result: We could monitor all hemodynamic parameters including pcwp PAP cardiac index EKG, adn hour urine as true clinical settings. We observed that the reliability of the VAD was excellent and the hemodynamic property of the experimental animal and end organ perfusion were adequate within 24 hours of experiment. In four lambs surviving 24 hours after insertion the reliability of the VAD and end organ perfusion were excellent and no thrombotic-hemolytic tendency was noted. However after 15 days of experiment the diaphragm of the VAD was torn and it was recommende that the durability of the VAD should be extended. Conclusion : e conclude that the pneumatic VAD developed at Dankook University Biomedical Engineering has good hemodynamic property and low thromboembolic tendency and presents adequate end organ perfusion but we noted that the durability of the device should be expanded further. It will be possible to do more reliable experiment in the future according to the animal experimental method developed in this study especially with the heart failure models.