사과나무(Malus domestical Borkh.)의 VA 內生菌根에 관한 硏究

沈慶久,李景俊,劉種勳 成均館大學校 科學技術硏究所 1988 論文集 Vol.39 No.1

The beneficial role of vesicular-arduscular mycorrhizae(VAM) for the growth of fruit trees has already been well demonstrated in many countries, but little has been studied about VAM in Korea. so far, researches concerning physiological aspects of VAM have been abundant compared to researches on the ecological sides in fruit trees. Especially, the study about VA mycorrhizae fungi indigenous to apple orchard soil has been less studied. The studies described here were undertaken to identify the genera of VAM fungi living in the soil wherein apple trees rooted, and to observe in fected roots of host plants in apple orchards in Suwean, Taegu, and Naju area. The results odtained were as follows. Apple roots infected by VAM fungi, and VAM fungi noticed in the rhizosphere soil were opserved in Suweon and Taegu, but only spores have been shown in Naju. Identified genera of the fungi investigated in the rhizosphere soil were Glomes sp. The VAM fungi showed a circular from, spore diameter and wall thickness were respectively 306㎛ and 17㎛. The form of attached hyphae was funnel shape, and that of vesicle was circular.

복숭아나무(Prunus persica)의 VA內生菌根에 관한 硏究

沈慶久,李景俊,安永熙,劉鍾勳 成均館大學校 科學技術硏究所 1985 論文集 Vol.36 No.1

The beneficial role of Vesicular-Arbuscular Mycorrhizae (VAM) for the growth of fruit trees has already been well demonstrated in many countries, but little has been studied about VAM in Korea. So far, researches concerning physiological aspects of VAM have been abundant compared to researches on the ecological sides in fruit trees. Especially, the study about VA mycorrhizal fungi indigenous to peach orchard soil has been less studied. This study was conducted to identify the genera of VA mycorrhizal fungi living in the soil where in peach trees rooted and to observe infected roots of host plants in peach orchards in Suweon, Taegu, and Naju area. The results obtained were as follows. Peach roots infected by fungi were observed and spores of the fungi were noticed in the rhizosphere soil in Suweon, but only spores have been shown in Taegu, Naju. Identified genera of the fungi in peach orchards in Suweon were Glomus sp. The form of vescicular observed was oblong and irregular.

造景樹木의 VA內生菌根에 관한 硏究

沈慶久,李景俊,安永熙,劉鍾勳 成均館大學校 科學技術硏究所 1985 論文集 Vol.36 No.2

The beneficial role of Vesicular-Arbuscular Mycorrhizae (VAM) for growth of woody landscape plants has already been well demonstrated in many countries, but little has been studied about VAM in Korea. So far, researches concerning physiological aspects of VAM have been abundant compared to researches on the ecological sides in woody landscape plants. Especially, the study about VA mycorrhizal fungi indigenous to threeflower maple (Acer triflorum), Korean mountain-ash. (Sorbus alnifolia), and European bird cherry (Prunus padus) have been less studied. The studies described here were undertaken to identify the genera of VAM fungi living in the soil wherein threeflower maple, Korean mountain-ash, and European bird cherry rooted, to observe infected root of host plants, and to compare mycorrhizal colonization related to soil factors. The results obtained were as follows. Ornamental trees roots infected by VAM fungi were observed and identified genera of the fungi investigated in the rhizosphere soil were Glomus sp. The VAM fungi of threeflower maple and Korean mountain-ash showed a circular form, but spore of European bird cherry showed a ellipsoidal form. Vesicle diameter of landscape plants were found from 25.21㎛ to 50.43㎛. Mycorrhizal colonization of threeflower maple, Korean mountain-ash, and European bird cherry were respectively 46.7, 33.3, and 20.0%. Soil pH of landscape trees were slightly acid, and available soil phosphate in the rhizosphere soil showed lower than normal soils. Rhizosphere soil moisture content were 22.90-29.38%.

변이형 협심증 환자의 진단에 있어 Iodine-123Metaiodobenzylguanidine 심근 스캔의 유용성

하종원,이종두,장양수,정남식,권준,임세중,이영준,심원흠,조승연,김성순 대한순환기학회 1998 Korean Circulation Journal Vol.28 No.2

3차 의료기관 응급센터로 내원한 아나필락시스 환자

박종석,박해심,이수영,정윤석,조준필 대한응급의학회 2001 대한응급의학회지 Vol.12 No.1

Background: Anaphylaxis is a systematic allergic reaction, which may be fatal. However, despite its seriousness, its low level of incidence has prevented in depth studies. Thus, we analyzed the causes of anaphylactic shock in patients admitted in a tertiary hospital, observed its clinical symptoms, and formed a basis for adequate emergency treatment, as well preventive methods. Methods: The patients who visited Ajou university hospitals from June 1994 to May 2000(7 years) and who met the 1974 JAMA definition were selected for this retrospective study. The analysis of causative agents was made on the basis of clinical symptoms and the patients' chief complaints at the time of admission. Patients diagnosed with anaphylactic shock included those showing at least two types of IgE-mediated symptoms; and those with a simple rash or breathing difficulties were excluded from the study. Results: Of 36 patients, 22 were male and 14 female, Those below the age of 20 comprised 16.7% of the patients(6 patients), between 20 and 29 comprised 16.7%(6 patients), 30 and 39 comprised 25%(9 patients), 40 and 49 comprised 27.8%(10 patients), over 50 comprised 14%(5 patients). The overall percentage show 70% of the patients in active adult age group. Rash was the most common clinical symptoms(89%, 32 patients) and hypotension the second(75%, 27 patients), followed by respiratory distress, fainting, and arrhythmia. Causative agents were insect bites, including bee stings(15 patients), medication(12 patients), food(8 patients), and unknown(1 patients). Nine(9) of the 36 case, were diagnosed as having an atopic origin. Conclusion: Bee sting was the single most common cause in the insect criteria while penicillin & NSAIDs accounted for most of medication-induced cases. Food showed a varied distribution. An atopic origin was not a basis for anaphylactic shock, but did show a two-fold increase of prevalence. This study is the first of its kind in addressing anaphylactic shock, a potentially severe illness, over a period of 7 years.

The Effect of Low-dose Dopamine on Splanchnic and Renal Blood Flow in Patients with Septic Shock under the Treatment of Norepinephrine

Jong Joon Ahn,Tae Hyung Kim,Ki Man Lee,Tae Sun Shim,Chae Man Lim,Sang Do Lee,Woo Sung Kim,Dong Soon Kim,Won Dong Kim,Younsuck Koh Korean Society of Critical Care Medicine 2001 Acute and Critical Care Vol.16 No.1

BACKGROUND: Norepinephrine, which is frequently administered as a vasopressor to the patients with septic shock, can decrease splanchnic and renal blood flows and aggravate splanchnic and renal ischemia. The low-dose dopamine (LDD) has been frequently combined with norepinephrine to ameliorate renal and splanchnic hypoperfusion in patients with septic shock. However, the effect of the LDD on the splanchnic and renal blood flow has not been fully elucidated. This investigation was carried out to determine the effect of the LDD on the splanchnic and renal blood flow in the patients with septic shock under the treatment of norepinephrine. METHODS: Eleven patients with septic shock were included in this study. All of them were under the norepinephrine treatment as the mean arterial pressure (MAP) was less than 70 mm Hg in spite of the adequate fluid resuscitation. With stabilization of MAP, the LDD (2 g/kg/min) was administered for two hours in each patients. Hemodynamics, gastric intramucosal pH (pHi), gastric regional PCO2 (rPCO2), rPCO2 - PaCO2, urine volume, urine sodium excretion and creatinine clearance were compared between with and without the LDD infusion. Diuretics was not used during the study period. RESULTS: Age of patients (n=11) was 64 12 and the APACHE III score was 84 17. The mortality rate of the subjects was 64%. Dosage of norepinephrine was 0.55 0.63 g/kg/min during the study period. There were no significant differences in hemodynamics (central venous pressure, cardiac output, pulmonary artery occlusion pressure, mixed venous gas), pHi, rPCO2, rPCO2 - PaCO2 depending on the concomitant infusion of the LDD. The volume of urine tended to increase (P=0.074) after concomitant LDD, but the changes in urine sodium excretion and creatinine clearance were not significantly different. CONCLUSIONS: The combined infusion of the LDD with norepinephrine did not improve splanchnic and renal blood flow in the patients with septic shock.

Korean Medication Algorithm for Bipolar Disorder 2018: Comparisons with Other Treatment Guidelines

Jong Hyun Jeong,Won-Myong Bahk,Young Sup Woo,이정구,Moon Doo Kim,Inki Sohn,Se-Hoon Shim,전덕인,Jeong Seok Seo,Won Kim,Hoo-Rim Song,Kyung Joon Min,Bo-Hyun Yoon 대한정신약물학회 2019 CLINICAL PSYCHOPHARMACOLOGY AND NEUROSCIENCE Vol.17 No.2

The objective of this study was to compare recommendations of the Korean Medication Algorithm Project for Bipolar Disorder 2018 (KMAP-BP 2018) with other recently published guidelines for treating bipolar disorder. We reviewed a total of five recently published global treatment guidelines and compared treatment recommendation of the KMAP-BP 2018 with those of other guidelines. For initial treatment of mania, there were no significant differences across treatment guidelines. All guidelines recommended mood stabilizer (MS) or atypical antipsychotic (AAP) monotherapy or a combination of an MS with an AAP as a first-line treatment strategy for mania. However, the KMAP-BP 2018 did not prefer monotherapy with MS or AAP for psychotic mania. Quetiapine, olanzapine and aripiprazole were the first-line AAPs for nearly all phases of bipolar disorder across guidelines. Most guidelines advocated newer AAPs as first-line treatment options for all phases while lamotrigine was recommended for depressive and maintenance phases. Lithium and valproic acid were commonly used as MSs in all phases of bipolar disorder. As research evidence accumulated over time, recommendations of newer AAPs (such as asenapine, cariprazine, paliperidone, lurasidine, long-acting injectable risperidone and aripiprazole once monthly) became prominent. KMAP-BP 2018 guidelines were similar to other guidelines, reflecting current changes in prescription patterns for bipolar disorder based on accumulated research data. Strong preference for combination therapy was characteristic of KMAP-BP 2018, predominantly in the treatment of psychotic mania and severe depression. Further studies were needed to address several issues identified in our review.

Residual Pattern of three Pesticides on Shallot (Allium ascalonicum L.) using Liquid Chromatography-tandem Mass Spectrometry

Jong-Hyouk Park,Joon-Seong Park,Jeong-Heui Choi,Jae-Han Shim 한국농약과학회 2011 한국농약과학회 학술발표대회 논문집 Vol.2011 No.11

Preliminary Study on the Development of Alternative Methods for the Treatment of TRISO Fuels

Jong-Hyeon Lee,Joon-Bo Shim,Byung-Gil Ahn,Sang-woon Kwon,Eung-Ho Kim,Jae-Hyung Yoo,Seong-Won Park,Christine T. Snyder,Leonard Leibowitz 한국방사성폐기물학회 2005 방사성폐기물학회지 Vol.3 No.3

본 연구에서는 사용후 TRISO 연료 처리를 위한 보다 효과적인 공정개발을 위하여 기존 전처리 기술에 대한 검토를 수행하였다. TRISO 연료 처리에 있어서 가장 중요한 사항은 연료입자에 포함되어 있는 탄소와 SiC성분을 효과적으로 분리하는데 있다. 공정개발 초기에 고려되었던 분쇄 후 배소공정의 경우 처리공정에서 발생되는 2차 폐기물로 인하여 분쇄 후 침출공정으로 대체 되었으나 여전히 해결해야 될 근본적인 문제점이 존재하고 있다. 따라서 본 논문에서는 TRISO 입자의 피복층 제거를 위한 새로운 개념의 열적 파쇄와 용융염 전해반응에 의한 피복층 제거 공정을 제안하였으며 각 공정에 대한 원리를 자세하게 기술하였다. In this study, conventional head-end processes of spent TRISO fuel have been reviewed to develope more effective treatment methods. The main concerns in the TRISO treatment are to effectively separate the carbon and SiC contained in the TRISO particles. The crush-burn scheme which was considered in the early stages of the development has been replaced by the crush-leach process because of problems as a second waste being generated during the process. However, there are still many obstacles to overcome in the reported processes. Hence, innovative thermomechanical concepts and a molten salt electrochemical approach to breach the coating layers of the TRISO particle with a minimized amount of second waste are proposed in this paper and their principles are described in detail.

Atomic Layer Deposition for Surface Engineering of Solid Oxide Fuel Cell Electrodes

Joon Hyung Shim,한권덕,Hyung Jong Choi,Yongmin Kim,Shicheng Xu,Jihwan An,Young Beom Kim,Tanja Graf,Thomas D. Schladt,Turgut M. Gür,Fritz B. Prinz 한국정밀공학회 2019 International Journal of Precision Engineering and Vol.6 No.3

Atomic layer deposition (ALD) has recently attracted attention as a technique to synthesize and engineer high-performance catalysts and electrodes for fuel cells. Unique advantages of the ALD process include surface conformality and film uniformity along nano-scale features and the ability to deposit one atom layer or less per deposition cycle, enabling atomic-scale modification of the composition and morphology of the material surface. Many recent reports have demonstrated the effectiveness of the ALD surface modification strategy for the development of novel fuel cell materials. For enhancement of fuel cell performance, development of superior electrocatalytic electrodes is essential as a significant portion of energy loss occurs due to the charge transfer reaction either on the surface of electrodes or at the interfaces between electrodes and electrolytes. Therefore, ALD is considered a key fabrication process to design and engineer high-performance fuel cell systems. This review covers the important recent developments advanced electrode materials for solid oxide fuel cells (SOFCs) provided by the unique abilities of ALD for surface engineering and interface modification. Performance enhancement and related mechanisms are also discussed in depth.