자궁근종의 양성 폐전이 치료 1례

유애리,문성택,김윤숙,전섭,최승도,선우재근,배동한 순천향의학연구소 2008 Journal of Soonchunhyang Medical Science Vol.14 No.2S

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직업성질환 감시체계의 계획과 관리

조수헌,홍윤철,임종한,장성실,천병철 大韓産業醫學會 2001 대한직업환경의학회지 Vol.13 No.1

직업성 질환에 관련된 다양한 진료를 체계적으로 수집하고 관리하여 직업성질환의 예방 목적으로 이를 활용하고 자하는 노력이 우리나라에서도 이제 다양한 방법으로 시도되고 있다. 최근의 자료 시스템의 구축과 관리 방법의 향상은 새로운 직업성 잘환감시방법을 개발하게 하여 직업성질환과 손상을 예 방하는데 크게 기여하고 있다. 우리나라에서도 기존의 산업보건사업의 성과를 계승하면서, 외국의 직업성질환 감시의 여러 경험을 비판적으로 수용하여 한국적인 직업성질환 감시 모델을 구축해야 할 것으로 생각된다. 자발적인 지역차원의 직업성질환 감시체계들이 틀을 잡아가고 있는 이 시점에서 본격적으로 직업성질환 감시체계 수립을 위한 전략과 구체적 방법론을 마련하고 공유하여야 할 필요가 있다. 이를 위하여 우리나라의 직업성질환 감시체계를 구축하는데 기초가 될 수 있는 직업성질환 감시체계의 계획과 관리에 대한 내용을 정리하였다. 이러한 감시체계를 우리나라에 정립하려는 노력들의 일환으로 최근 직업성질환감시연구회의 결성 및 각 지역의 직업성질환 감시체계의 운영 등이 조금씩 결실을 맺어가고 있어 간략히 소개하면 다음과 같다.첫째, 최근에 인천, 천안, 대전, 여천, 구미 등에서 지역단위의 직업성질환 감시체계를 구축하고 있고 한국산업안전공단에서는 특수건강진단과 작업환경측정 자료를 전산화하여 이를 직업성질환 감시에 사용하는 전국단위의 감시체계와 천식, 근골격계질환, 피부질환 등 질환별 감시체계 등이 시도되고 있다.둘째, 이러한 움직임은 과거에 비하여 한층 발전된 양상이고 바람직하지만 이제는 국가적 차원에서 직업성질환 감시체계를 어떻게 설정하고 조율할 지를 고민하고 계획하여야 할 때이다. 즉 한국산업안전공단과 지역단위 직업성질환 감시체계들의 역할분담과 상호 정보의 교류 등이 정리되어야 이를 바탕으로 유기적인 국가 직업성질환 감시체계가 구축될 수 있다.셋째, 이를 위하여서는 직업성질환 감시체계 구축의 방법론을 서로 교류하고 공유할 필요가 있으며 나아가서는 이를 표준화하여 기본적인 자료의 교류가 원활하게 이루어질 수 있도록 하여야 한다. 이러한 역할은 최근에 결성된 직업성질환감시연구회와 산업안전보건연구원, 그리고 대한산업의학회, 산업간호학회, 산업위생학회 등이 협력하여 학술적인 작업과 함께 실무적인 지침을 만들어나가도록 하는 것이 바람직할 것이다.

만성 신부전증 환자의 중중 고혈당에 따른 의식 변화 결정에 대한 연구

위형중,이창범,박성광,강성귀,임천규,박은주,윤경택,한상웅,안유헌,김호중· 대한신장학회 2000 대한신장학회잡지 Vol.19 No.6

Measurement of NH₃ Volatilization from Organic Fertilizer Using a Dynamic Chamber

Yun-Gu Kang(강윤구),Jae-Han Lee(이재한),Jin-Hyuk Chun(천진혁),Yong-Jun Yu(유용준),Jun-Yong Lee(이준영),Gi-Bum Yi(이기범),Taek-Keun Oh(오택근) 한국토양비료학회 2021 한국토양비료학회 학술발표회 초록집 Vol.2021 No.11

Most organic fertilizers are manufactured using imported ingredients and organic fertilizer can improve the agricultural productivity through soil fertility improvement and microbial activity increase. Ammonia (NH₃) is mostly emitted from the agricultural sector and the NH₃ emission from fertilizer use is about 7%. Biochar can be produced under oxygen-limited conditions using several biomass and biochar has effects such as carbon sequestration and heavy metal adsorption in the soil. In this study, the organic fertilizers (OF) were classified according to the type of ingredients and the mixing ratio, and the NH₃ emission was evaluated using a dynamic chamber method. OF1 and OF2 are commonly used organic fertilizers in domestic, and OF3 and OF4 are manufactured by mixing biochar. When only organic fertilizers were used, OF1 represented the highest emission (25.12 kg ha<SUP>-1</SUP>), and when both organic and inorganic fertilizers were treated, OF3+NPK expressed the most volatilization (155.41 kg ha<SUP>-1</SUP>). When biochar is added to organic fertilizer, the pH and total nitrogen content of the organic fertilizer decreased and the total carbon content and inorganic contents increased. However, when organic fertilizer contained biochar is treated to the soil, it is thought to be beneficial to growth of crops by increasing the content of phosphate and potassium. This study evaluated the possibility of replacing some of the ingredients of organic fertilizer with biochar and the emitted NH₃. Results showed that it is most advantageous to promote crop growth when producing like OF4 type.

Evaluation of the Biochars pH on NH₃ Volatilization

Yun-Gu Kang(강윤구),Jin-Hyuk Chun(천진혁),Jae-Han Lee(이재한),Yeo-Uk Yun(윤여욱),Gi-Bum Yi(이기범),Taek-Keun Oh(오택근) 한국토양비료학회 2021 한국토양비료학회 학술발표회 초록집 Vol.2021 No.11

Nitrogen (N) is one of the most vital nutrient elements in plant growth. The plant quality and quantity varies depending on the amount of N. However, owing to the moderately low N use efficiencies by the growing crops, a considerably large percentage of it about 10 - 20% is volatilized to the atmosphere as form of NH₃ and N₂O. The volatilized NH₃ reacts with various oxides (NO<SUB>x</SUB>, SO<SUB>x</SUB>) to generate secondary particulate matter (PM2.5). Therefore, this study aimed to assess if biochars pH can impact its capacity of lessening NH3 emitted from the fertilized agricultural fields. Biochar was applied with 1% (w w<SUP>-1</SUP>) while N in form of urea was applied at three different rates of 160, 320, and 640 kg ha<SUP>-1</SUP>. NH₃ was collected using a dynamic chamber method and analyzed following the indophenol blue method after extraction with 2 M KCl solution. Based on the results indicate that the daily NH₃ emissions peaked within 4 - 7 days after fertilizations and decreased sharply afterwards. biochar amendments greatly reduced NH₃ emissions in all the treatments. The greatest reduction of 25% in relation to the control came from the neutral biochar (pH 6.7) applied to the soil fertilized with the 320 kg N ha<SUP>-1</SUP> and is thus, the most effective way of reducing NH3 volatilizations.

Polydopamine-mediated surface modifications of poly <small>L</small>-lactic acid with hydroxyapatite, heparin and bone morphogenetic protein-2 and their effects on osseointegration

Yun, Young Jin,Kim, Han-Jun,Lee, Deok-Won,Um, Sewook,Chun, Heung Jae Elsevier 2018 Journal of industrial and engineering chemistry Vol.67 No.-

<P><B>Abstract</B></P> <P>Surface modified poly <SMALL>L</SMALL>-lactic acid (PLLA) samples with hydroxyapatite (HA), heparin and bone morphogenetic protein-2 (BMP-2) mediated by polydopamine (pDA) coating (PLLA/pDA/HA/Hep/BMP-2) were prepared, and their effects on the enhancements of bone formation and osseointegration were evaluated <I>in vitro</I> and <I>in vivo</I> as compared to PLLA, PLLA/pDA/HA, and PLLA/pDA/Hep/BMP-2. The changes in surface chemical compositions, morphologies and wettabilities were observed by X-ray photoelectron spectroscopy (XPS), field-emission scanning electron microscopy (FE-SEM), atomic force microscopy (AFM) and water contact angle measurements. Pre-coating of HA particles with pDA provided uniform and homogeneous anchoring of particles to PLLA surface. In addition, the strong ionic interaction between heparin and pDA led PLLA surface readily heparinized for loading of BMP-2. <I>In vitro</I> experiments revealed that the levels of alkaline phosphatase (ALP) activity, calcium deposition, and osteocalcin (OCN) gene expression were higher in MG-63 human osteosarcoma cell lines grown on PLLA/pDA/HA/Hep/BMP-2 than on control PLLA, PLLA/pDA/HA, and PLLA/pDA/Hep/BMP-2. <I>In vivo</I> studies using micro-computed tomography (micro-CT) also showed that PLLA/pDA/HA/Hep/BMP-2 screw exhibited greatest value of bone volume (BV) and bone volume/tissue volume (BV/TV) among samples. Histological evaluations with H&E and Von Kossa staining demonstrated that a combination of HA and BMP-2 contributed to the strong osseointegration.</P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

한국인 성인 남자의 피부로부터 경막외강까지의 거리

전태완,조경행,송중한,강윤식 대한마취과학회 1994 Korean Journal of Anesthesiology Vol.27 No.11

The distance fmm skin to the lumber epidural space was measured in 60 male patients receiving epidural analgesia. The mean distance was found to be 4.45cm. The epidural depths were identified most frequently at 4.0 to 4.5cm deep and over 90% of total cases were less than 5.5cm deep. The epidural depths had correlations with weight and PI(P $lt; 0.001), but not correlated with height.

Initial Immunomodulation Using Mg(OH)₂ Promotes Renal Regeneration via Anti-Inflammatory Processes

Chun, So Young,Kim, Hyun Tae,Ha, Yun-Sok,Yu, Na-Hee,Lih, Eugene,Kim, Dae Hwan,Kwon, Se Yun,Song, Phil Hyun,Kim, Jeongshik,Kim, Bum Soo,Kim, Bup Wan,Han, Dong Keun,Kwon, Tae Gyun American Scientific Publishers 2018 Journal of biomaterials and tissue engineering Vol.8 No.5

Synthesis of Nanoscale γ-Fe2O3 Powders with Hydrates via Microwave-Assisted Heat Treatment

Han-Sol Yun,So-Young Shin,Kwon-Jin Park,Chun-Yeol You,Nam-Hee Cho 대한금속·재료학회 2021 ELECTRONIC MATERIALS LETTERS Vol.17 No.3

Herein, the eff ect of microwave irradiation on the formation of γ-Fe 2 O 3 phase was investigated. The structural and chemicalfeatures of the γ-Fe 2 O 3 synthesized via microwave-assisted heat treatment (MWH) were examined in terms of precursors. Three diff erent types of precursors, i.e., FeC 2 O 4 ∙2H 2 O (FH), FeOOH, and Fe 3 O 4 , were used, and each precursor was heatedin a temperature range of 100–300 °C via MWH. Nanocrystalline γ-Fe 2 O 3 powders with a crystallite size of ~ 19 nm weresynthesized when the source FH was heat-treated at 120 °C for 20 min by MWH. The activation energy required for the formationof γ-Fe 2 O 3 powders was 21.4 kJ/mol, which is approximately one-third or one-quarter of the activation energy (68.5and 87.9 kJ/mol) reported for the synthesis of γ-Fe 2 O 3 via conventional heating. The lattice parameter of the synthesizedγ-Fe 2 O 3 phase expanded to 8.360 Å at 120 °C, whereas it contracted to 8.351 Å at 200 °C. This variation can be attributed tothe content of the surface-absorbed OH group. The values of the saturated magnetization and coercive force of the powdersincreased by approximately threefold with increasing crystallinity.

성인에서의 장 회전 이상 1예

한동수,이민호,최춘식,박근태,이오영,기춘석,박경남,정진웅,조윤주,박문승,손주현,윤병철,최호순,권오정,임현철 대한소화기학회 1998 대한소화기학회지 Vol.31 No.2

Intestinal malrotation is a rare disorder typically found in childhood. In adults it is an uncommon disease, and usually presents as bowel obstruction. Occasionally the clinical picture is confusing and the diagnosis of mahotation is not discovered until operation. Intestinal malrotation represents an arrest in the normal counterclockwise rotation of the cecum from the left lower quadrant to the right upper quadrant. The example is nondescent of the cecum, in which this structure remains in the subhepatic position. These are the diagnostic problems of differentiating between acute appendicitis and acute cholecystitis and the difficulty of appendectomy through a lower abdominal incision. In some patients, the cecum that cross the duodenum (Ladd's bands) is often fixed in an abnormal position by dense adhesion. In addition, the colon and the small intestine have a common mesentery with a lack of fixation to the lateral and posterior regions of the abdominal cavity. The usual mechanism of obstruction is adhesive compression of the duodenum and volvulus of the small intestine. Herein we experienced the case with intestinal malrotation associated with Ladd's bands with duodenal compression, presenting with acute abdominal pain and vomiting.