실험을 통한 Written Pole Motor의 특성 분석

김호현,박성철,김병택 제어로봇시스템학회 2009 제어로봇시스템학회 합동학술대회 논문집 Vol.2009 No.12

대중교통 관리 대상(지하철, 열차, 버스) 내 규제물질 분포 특성

김호현 한국냄새환경학회 2019 실내환경 및 냄새 학회지 Vol.18 No.3

This study investigated the indoor air quality conditions of public transportation according to the changing of seasons and different times of the day. We measured the concentration of PM10 and CO2, which are substances subject to control measures and limits established by Ministry of Environment for public transportation, and compared actual levels whit the legal standard. Public transportation was classified as subway lines (form 1 to 4), trains (KTX, ITX) and buses. The PM10 concentration was measured as being high during peak hours in winter compared to that in summer. On the other hand, the PM10 concentration in trains and buses was shown to be low. The CO2 concentration in public transportation was recorded as being higher than the legal standard. PM10 concentration was affected by the inflow of outdoor air, and CO2 concentration was influenced by the number of people in a particular space or environment. This survey focused on the indoor air quality of public transportation. The basic data could prove useful in formulating policies to promote and maintain good indoor air quality with regard to public transportation.

Cyclosporin A의 肝毒性에 미치는 右歸飮의 影響

金昊顯,申興默,金吉萱 동국대학교 한의학연구소 1993 東國韓醫學硏究所論文集 Vol.2 No.2

The purpose of this study is to observe the effect of Woogyuyem on serum reaction and hepatic tissue in Cyclosporin A treated rats. In this study, the experimental rats divided two group(Contro1 group and Sample group). Under the Same condition, both control group and sample group were injected to abdomen with Cyclosporin A for 7days. And then, control group were administered water, sample group were administered Woogy-uyeum for 30days. The change of transaminase and bile acid and SOD activity in blood serum, hepatic tissue were measured at 3rd, 7th, 15th, 30th day. The obtained results are surnmarised as follows : 1. In the change of SGOT contents, as compared with control group, sample group was significantly decreased at 7th and 15th day. 2. In the change of SGPT contents, as compared with control group, sample group was signi�icantly decreased at 15th day. 3. In the change of serum bile acid contents, as compared with control group, sample group was significantly decreased at 7th and 15th day. 4. In the change of serum SOD activity, as compared with control group, sample group was significantly increased at 15th and 30th day. 5. In the change of hepatic tissue, as compared with control group, the vacuolation of hepatocytes in the sample group was reduced, the liver plates were reconstructed, and the epitherial cell wasn't destructed.

초등학교 및 학원 실내 공간 내 알데히드류 노출로 인한 건강위해성 평가

김호현,양지연,이청수,박주희,신동천,임영욱 한국실내환경학회 2012 한국실내환경학회지 Vol.9 No.1

The purpose of this study was to investigate the health risk and management of childhood exposure to indoor aldehydes in elementary-schools and academies. The samples were collected at children’s facilities (50 elementary-schools and 46 academies) in summer (Aug ~ Sept, 2008), winter (Dec 2008 ~ Feb, 2009) and Spring (Mar ~ Apr, 2009) periods. The overall mean concentration of formaldehyde was 68.3 ㎍/㎥ and 27.2% of exceeded the 100 ㎍/㎥ by the school health guideline. The concentration ratio of Indoor air and outdoor air (I/O) of aldehydes exceeds 1.0. The level of indoor air contamination did appear to be high, and 24.6% of the academies evaluated had exceeded the formaldehyde level specified by the public health act (120 ㎍/㎥). We estimated the lifetime excess cancer risks (ECRs) of formaldehyde, and the hazard quotients (HQs) of non-carcinogens (acetaldehyde and benzaldehyde). In addition, for carcinogens, the excess cancer risk (ECR) was calculated by considering the process of deciding cancer potency factor (CPF) and age dependent adjust Factor (ADAF) of the data of adults. The average ECRs of formaldehyde for young children were 1×10-6~1×10-5 level in all facilities. HQs of formaldehyde did exceed 0.1 for all subjects in elementary school.

혈부축어탕이 Triton WR-1339에 의한 고지혈증 유발 생쥐 간조직내 지질 축적 억제에 미치는 영향

김호현,방혜정,강윤호,박인식,안상현,김진택,이해풍,Kim, Ho-Hyun,Bang, Hyui-Jeng,Gang, Yun-Ho,Park, In-Sick,Ahn, Sang-Hyun,Kim, Jin-Tack,Lee, Hai-Poong 대한동의생리학회 1999 동의생리학회지 Vol.14 No.2

After Triton WR-1339 (TX; 600mg/kg) intraperitoneal injection, hepatic tissues of ICR mice were intragastric injected with Hyulboochucketang extract(HCE; 3.3ml/kg/day) were observed to investigate the suppressive effect of lipid accumulation that evoke by the antihyperlipidemic effect of HCE. These hepatic tissues were fixed in fromol-calcium solution and were cryocut. These tissues stained by H&E for general morphology, sudan black B for lipid and perchloric acid-naphthoquinone(PAN) method for cholesterol. After TX treatment, the increase of hepatocyte having meshlike cytoplasm(HHMC) were shown in all hepatic lobules and the hepatic plates were disappeared in the aggregative region of HHMC. The number of blue black colored lipid drop and dark green colored asterisk shaped cholesterol particle in hepatic cytoplasm were increased and the size of lipid drop and cholesterol particle were enlarged. But, in HCE-treated mice, the HHCM were disappeared and hapatic plate were rearranged. The number of lipid drop and cholesterol particle were decreased than TX-treated mice and the size of lipid drop and cholesterol particle were diminished. As results indicated that the HCE work on the suppression of lipid accumulation in hepatic tissue of hyperlipidemic mice caused by disturbance of lipid metabolism.

Health Risks Assessments in Children for Phthalates Exposure Associated with Childcare Facilities and Indoor Playgrounds

김호현 환경독성보건학회 2013 환경독성보건학회지 Vol.28 No.-

Health Risks Assessment in Children for Phthalate Exposure Associated with Childcare Facilities and Indoor Playgrounds

김호현,양지연,김선덕,양수희,이청수,신동천,임영욱 환경독성보건학회 2011 환경독성보건학회지 Vol.26 No.-

Objectives: This study assessed the health risks for children exposed to phthalate through several pathways including house dust, surface wipes and hand wipes in child facilities and indoor playgrounds. Methods: The indoor samples were collected from various children’s facilities (40 playrooms, 42 daycare centers, 44 kindergartens, and 42indoor-playgrounds) in both summer (Jul-Sep, 2007) and winter (Jan-Feb, 2008). Hazard index (HI) was estimated for the non-carcinogens and the examined phthalates were diethylhexyl phthalate (DEHP), diethyl phthalate (DEP), dibutyl-n-butyl phthalate (DnBP), and butylbenzyl phthalate (BBzP). The present study examined these four kinds of samples, i.e., indoor dust, surface wipes of product and hand wipes. Results: Among the phthalates, the detection rates of DEHP were 98% in dust samples, 100% in surface wipe samples, and 95% in hand wipe samples. In this study, phthalate levels obtained from floor dust, product surface and children’s hand wipe samples were similar to or slightly less compared to previous studies. The 50th and 95th percentile value of child-sensitive materials did not exceed 1 (HI) for all subjects in all facilities. Conclusions: For DEHP, DnBP and BBzP their detection rates through multi-routes were high and their risk based on health risk assessment was also observed to be acceptable. This study suggested that ingestion and dermal exposure could be the most important pathway of phthalates besides digestion through food.

폐쇄성 대장암 수술에 있어서 스텐트 삽입술의 유효성

김호현,김호군,조상혁,허정욱,류성엽,김형록,김동의,김영진,주재균 대한대장항문학회 2009 Annals of Coloproctolgy Vol.25 No.2

Purpose: Treatment for malignant colonic obstruction consists of a multiple-staged emergency operation. In recent years, some authors have reported low morbidity and mortality rates using self-expandable metallic stents. This study is designed to evaluate the usefulness of self-expandable metallic stents in patients with malignant colonic obstruction. Methods: The records of 38 patients who had undergone surgery for malignant colonic obstruction at our institution between January 2004 and August 2006 were reviewed retrospectively. Seventeen patients were treated with elective surgery after stent insertion, bowel decompression, and bowel preparation (stent group), and 21 patients were treated with emergency surgery without stent insertion (control group). Results: There were no significant differences in age, sex, tumor node metastasis (TNM) stage, or cancer position between the two groups (elective operation after stent insertion vs. emergency operation). Of the 17 patients who underwent elective operation after stent insertion, primary anastomosis was possible in 15 (88.2 vs. 57.1% in the control group), with a lower need for a colostomy (11.8 vs. 42.9% in the control group, P=0.036). Also, the number of patients with severe complications (17.6 vs. 47.6% in the control group, P=0.048) and the hospital stay (10.82 vs. 13.43 days in the control group, P=0.032) were significantly lower in the study group. Conclusion: Placement of a self-expandable metallic stent for malignant colonic obstruction is a safe and effective procedure. It can reduce the colostomy, mortality, and morbidity rates and the hospital fee for treatment. Purpose: Treatment for malignant colonic obstruction consists of a multiple-staged emergency operation. In recent years, some authors have reported low morbidity and mortality rates using self-expandable metallic stents. This study is designed to evaluate the usefulness of self-expandable metallic stents in patients with malignant colonic obstruction. Methods: The records of 38 patients who had undergone surgery for malignant colonic obstruction at our institution between January 2004 and August 2006 were reviewed retrospectively. Seventeen patients were treated with elective surgery after stent insertion, bowel decompression, and bowel preparation (stent group), and 21 patients were treated with emergency surgery without stent insertion (control group). Results: There were no significant differences in age, sex, tumor node metastasis (TNM) stage, or cancer position between the two groups (elective operation after stent insertion vs. emergency operation). Of the 17 patients who underwent elective operation after stent insertion, primary anastomosis was possible in 15 (88.2 vs. 57.1% in the control group), with a lower need for a colostomy (11.8 vs. 42.9% in the control group, P=0.036). Also, the number of patients with severe complications (17.6 vs. 47.6% in the control group, P=0.048) and the hospital stay (10.82 vs. 13.43 days in the control group, P=0.032) were significantly lower in the study group. Conclusion: Placement of a self-expandable metallic stent for malignant colonic obstruction is a safe and effective procedure. It can reduce the colostomy, mortality, and morbidity rates and the hospital fee for treatment.

Case Studies for the Ratification of Stockholm Convention on Persistent Organic Pollutants with Specific Exemption in South Korea

김호현,신동천,양지연,이준상,이재영,임영욱 환경독성보건학회 2009 한국독성학회 심포지움 및 학술발표회 Vol.- No.-

라돈의 노출현황 및 정책방향 - 군부대 병영생활관 내 라돈 노출 현황

김호현,이동현,Kim, Ho-Hyeon,Lee, Dong-Hyeon 한국공기청정협회 2019 空氣淸淨技術 Vol.32 No.1