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朴鍾煥 中央醫學社 1974 中央醫學 Vol.26 No.6
A case of huge ovarian cyst in 45 years old multiparous woman is presented with a brief review of literatures. This woman was admitted to our clinic with the complaints of marked abdominal distention which progressed rather rapidly: during recent two years. The woman was operated upon abdominally by the author. The tumor was removed surgically after puncture aspiration of the cystic contents before and during the operation. The tumor weight was 29.5 kg. and the volume' of cystic contents were about I1 L. Microscopic sections showed multiloculated mucinous cy stadenoma of the left ovary. The postoperative condition was uneventful and the patient was discharged on the tenth postoperative day.
朴鍾桓 건국대학교 1991 대학원 학술논문집 Vol.33 No.-
Economic integration have an effect on the export of the non-member countries that trade with member countries and on the national economy of the nonmember countries. In this research, I tried to disclose the relations between export and the trade barrier. In view of the above mentioned, I forecasted the model that cause the effect of the economic integration. At the same time, I studied the national economic effect caused by export change and I studied the economic effect on non-member countries by economic integration with general equilibrium analysis the input-output table.
박종환,최원열,김행훈,백형진,윤문섭 한국국제농업개발학회 2000 韓國國際農業開發學會誌 Vol.12 No.1
1. 種子의 水分含量이 15∼20%에서 細胞의 結氷이 유기되는 것으로 보여서 양파종자를 초저온 저장할 경우에는 수분함량을 12%이하로 낮추어 초저온 저장을 하여야 안전하게 저장 될 수 있겠다. 2. 乾燥 및 초저온 저장에 의해 發芽에 所要되는 平均發芽期間이 짧아지게 된 처리에서 發芽率도 上昇되었다. 3. 發芽勢 및 發芽速度係數가 上昇되면 發芽率도 높게 維持되어 種子發芽 및 種子活力程度의 測定基準이 될 수 있겠다. 4. 농우대고, Spring sun #3, Senshu yellow등은 乾燥處理에 强하나 Senshu chuukoo와 Kaijukawase등은 乾燥에 敏感하게 反應하는 品種들로서 그 特性에 알맞은 乾燥處理가 필요 할 것으로 보였다. 5. 水分含量이 지나치게 높거나 낮으면 發芽率 및 發芽勢가 低下되었으며, 平均發芽期間 Kotowski 發芽速度는 서로 否의 相關을 보인 반면 發芽勢와 發芽率은 全品種에서 高度의 正의 相關關係를 보였다. Effects of dehydration on the survival of 11 cultivars of onion seed under liquid nitrogen were studied. The results suggest that onion seeds can be stored in LN₂safely, if moisture contents of seeds were less than 12%. As the average germination time was shortened and the germination vigour and Kotowski velocity were increased, the germination rate was increased. Nongwoodaego, Spring sun #3 and Senshu yellow cultivars are resistant to dehydration, but Senshu chuukoo and Kaijukawase cultivars are sensitive to dehydration. Germination vigour and germination velocity can be used as indicators of seed viability. Regression analysis between moisture content and germination rate, moisture content and germination vigour represent polynomial curves and regression between average germination time and Kotowski velocity is negatively correlated. But the regression between germination vigour and germination rate is positively correlated.
박종환,이서임,황세욱,엄주현,김성헌,강세원,조주식,서동철 한국응용생명화학회 2020 Applied Biological Chemistry (Appl Biol Chem) Vol.63 No.2
This study was conducted to evaluate (i) the characteristics of ammonia gas emissions from soybean cultivation soils amended with varying levels of urea and soil water, and (ii) the rate of reduction in ammonia emissions that could be obtained by applying mixed microorganisms (MM) to the urea-treated soils. The ammonia gas emissions from all treatments except the control were highest on day 2 of a laboratory-scale experiment and decreased gradually thereafter. The ammonia gas emissions from the soils increased with increasing urea and soil water contents. However, there were less emissions from soils treated with MM than those from the urea only treatment, and emissions also decreased significantly as the concentration of MM increased. In a field-scale experiment, the total cumulative emissions of ammonia from soil treated with a combination of chemical fertilizers and MM was reduced to 85.8% of that from the soil treated with chemical fertilizers only. Although we infer that MM can be used as an agent to reduce ammonia gas emissions from actual soils used for soybean cultivation, our knowledge of the processes involved in reducing ammonia emissions using microbial treatment is still limited. Consequently, further studies are required to investigate the efficient control of ammonia gas emissions from agricultural soils through the application of microorganisms.
Zinc Adsorption Characteristics by Biochar Derived from Spent Coffee Grounds
박종환,김홍출,김성헌,김영진,강세원,조주식,서동철 한국토양비료학회 2019 한국토양비료학회지 Vol.52 No.1
Zinc (Zn) adsorption characteristics of biochar derived from spent coffee grounds (SCGB) were evaluatedunder various conditions. Zinc adsorption was well described by pseudo-second order and Langmuir isothermmodels with maximum adsorption capacity of 26.6 mg g-1. Additional fitting of intraparticle model showedthat Zn in SCGB was controlled by both external surface adsorption and intraparticle diffusion. As a result ofadsorption of Zn on SCGB according to the initial pH, the adsorption capacity of Zn increased as pH increasedfrom 2 to 6, but decreased dramatically from pH 7. The adsorption capacity of Zn by SCGB in the presence ofother metals was remarkably reduced. In particular, the adsorption amount of Zn in the Pb and Zn complexsolution was reduced by 82.9% compared with that of the Zn single solution, which is considered to be closelyrelated to the properties of the metal itself such as electronegativity and hydrate radius. The FTIRdemonstrated that Zn in SCGB was related to carbon and oxygen functional groups. Overall, SCGB could beapplied as an adsorbent for Zn removal from aqueous solution, and its direct production through pyrolysis ofspent coffee grounds could make it an economic option as absorbent for treating Zn-rich wastewater.