연구논문 : 천자검사를 받은 복수 환자의 원인 분석

황보영 ( Young Hwangbo ),정지헌 ( Ji Heon Jung ),심재준 ( Jae Joon Shim ),김병호 ( Byung Ho Kim ),정성훈 ( Sung Hoon Jung ),이창균 ( Chang Kyun Lee ),장재영 ( Jae Young Jang ),동석호 ( Seok Ho Dong ),김효종 ( Hyo Jong Kim ),장영운 대한간학회 2007 Clinical and Molecular Hepatology(대한간학회지) Vol.13 No.2

공장의 가성폐쇄를 동반한 잠복매독에 의한 AA형 아밀로이드증 1예

황보영 ( Young Hwangbo ),김효종 ( Hyo Jong Kim ),이재연 ( Jae Yeon Lee ),장재영 ( Jae Young Jang ),동석호 ( Seok Ho Dong ),김병호 ( Byung Ho Kim ),장영운 ( Young Woon Chang ),장린 ( Rin Chang ) 대한장연구학회 2010 Intestinal Research Vol.8 No.2

Amyloidosis uncommonly presents with intestinal pseudo-obstruction. According to previous reports, patients with primary AL amyloidosis presented with a chronic process with symtom duration of more than 1 year, but patients with secondary AA amyloidosis presented as an acute illness, usually less than 10 weeks. Localized gastrointestinal amyloidosis limited to the jejunum, without involvement of stomach, duodenum, colon, or rectum, is very rare. Imaging studies in small intestinal amyloidosis generally show a symmetrical uniform appearance. AA amyloidosis with acute-phase reactant serum amyloid A protein is associated with inflammatory, infectious or neoplastic disorders. To our knowledge, no case of amyloidosis associated with latent syphilis has been reported to date. We present a case of a 56-year-old man who presented with clinical and radiographic features of a small bowel obstruction and obscure gastrointestinal bleeding. Investigations including laparoscopy and other laboratory dataled to a diagnosis of pseudo-obstruction of the jejunum due to AA amyloidosis associated with latent syphilis. After appropriate treatment for latent syphilis, abdominal symptoms had been disappeared, but jejunal dilatation was still present two years later. (Intest Res 2010;8:195-199)

활동기 염증성 장질환 환자의 관해 유도 치료 후 혈중 Leptin, Adiponectin, Resistin, Visfatin의 변화

황보영 ( Young Hwangbo ),김효종 ( Hyo Jong Kim ),심재준 ( Jaejun Shim ),장재영 ( Jae Young Jang ),동석호 ( Seok Ho Dong ),김병호 ( Byung Ho Kim ),장영운 ( Young Woon Chang ) 대한장연구학회 2010 Intestinal Research Vol.8 No.2

Background/Aims: The aim of this study was to evaluate the change in circulating levels of adipokines, including leptin, adiponectin, resistin, and visfatin, after induction therapy of patients with active inflammatory bowel disease (IBD). Methods: We prospectively evaluated 20 patients with Crohn’s disease (CD) and 14 patients with ulcerative colitis (UC) who received induction therapy. The disease activity, body mass index (BMI), and C-reactive protein (CRP) and serum adipolines levels were checked before treatment and 10 weeks after treatment. Results: After induction therapy, significant reduction of disease activity was noted in patients with CD (CD activity index, 267.9±73.7 vs. 50.8±36.5, P<0.001) and patients with UC (Mayo score, 9.8±2.2 vs. 1.4±1.6, P<0.001). The mean serum leptin, adiponectin, resistin, and visfatin levels were 4.0±2.7 ng/mL and 4.4±2.3 ng/mL (P=0.323), 27.0±20.5 μg/mL and 33.8±26.5μg/mL (P=0.084), 9.0±4.0 ng/mL and 10.2±3.2 ng/mL (P=0.108), and 4.6±3.7 ng/mL and 2.5±4.1 ng/mL (P=0.046) before and after infliximab treatment, respectively. No significant correlation between the changes in BMI, CRP level, or the clinical indices of activity and alterations of the measured adipokines was demonstrated. Conclusions: The serum levels of leptin, adiponectin, and resistin showed no significant alterations, whereas the serum visfatin level decreased significantly after induction therapy, suggesting a possible pro-inflammatory property of visfatin and a role as a marker of successful therapy of IBD. (Intest Res 2010;8:151-161)

초음파 분무 열분해 공정을 이용한 TiO₂와 TiOF₂ 복합체 분말의 합성과 상 분율에 따른 광학적 성질

황보영,박우영,이영인,Hwangbo, Young,Park, Woo-Young,Lee, Young-In 한국재료학회 2017 한국재료학회지 Vol.27 No.6

Photoelectron-hole separation efficiency plays an important role in the enhancement of the photocatalytic activity of photocatalysts towards the degradation of organic molecules. In this study, $TiO_2/TiOF_2$ heterostructured composite powders with suitable band structures, which structures are able to separate photoelectron-hole pairs, have been synthesized using a simple and versatile ultrasonic spray pyrolysis process. In addition, their phase volume fractions have been controlled by varying the pyrolysis temperature from $400^{\circ}C$ to $800^{\circ}C$. The structural and optical properties of the synthesized powders have been characterized by X-ray diffraction, scanning electronic microscopy and UV-vis spectroscopy. The powder with a phase volume ratio close to 1, compared with single $TiOF_2$ and other composite powders with different phase volume fractions, was found to have superior photocatalytic activity for the degradation of rhodamine B. This result shows that the $TiO_2/TiOF_2$ heterostructure promotes the separation of the photoinduced electrons and holes and that this powder can be applicable to environmental cleaning applications.

염 보조 초음파 분무 열분해법을 이용한 ZrO₂:Eu³⁺ 나노입자의 합성 및 발광 특성

황보영,임효령,이영인,Hwangbo, Young,Lim, Hyo Ryoung,Lee, Young-In 한국재료학회 2017 한국재료학회지 Vol.27 No.5

Inorganic phosphors based on $ZrO_2:Eu^{3+}$ nanoparticles were synthesized by a salt-assisted ultrasonic spray pyrolysis process that is suitable for industrially-scalable production because of its continuous nature and because it does not require expensive precursors, long reaction time, physical templates or surfactant. This facile process results in the formation of tiny, highly crystalline spherical nanoparticles without hard agglomeration. The powder X-ray diffraction patterns of the $ZrO_2:Eu^{3+}$ (1-20 mol%) confirmed the body centered tetragonal phase. The average particle size, estimated from the Scherrer equation and from TEM images, was found to be approximately 11 nm. Photoluminescence (PL) emission was recorded under 266 nm excitation and shows an intense emission peak at 607 nm, along with other emission peaks at 580, 592 and 632 nm which are indicated in red.

염 보조 초음파 분무 열분해 공정을 이용한 BaTiO₃ 나노입자의 합성과 광학적 성질

황보영,이영인,Hwangbo, Young,Lee, Young-In 한국분말야금학회 2017 한국분말재료학회지 (KPMI) Vol.24 No.4

The structural formation of inorganic nanoparticles dispersed in polymer matrices is a key technology for producing advanced nanocomposites with a unique combination of optical, electrical, and mechanical properties. Barium titanate ($BaTiO_3$) nanoparticles are attractive for increasing the refractive index and dielectric constant of polymer nanocomposites. Current synthesis processes for $BaTiO_3$ nanoparticles require expensive precursors or organic solvents, complicated steps, and long reaction times. In this study, we demonstrate a simple and continuous approach for synthesizing $BaTiO_3$ nanoparticles based on a salt-assisted ultrasonic spray pyrolysis method. This process allows the synthesis of $BaTiO_3$ nanoparticles with diameters of 20-50 nm and a highly crystalline tetragonal structure. The optical properties and photocatalytic activities of the nanoparticles show that they are suitable for use as fillers in various nanocomposites.

초음파 분무 열분해 공정을 이용한 TiOF₂ 분말의 합성과 광학적 성질

황보영,이영인,Hwangbo, Young,Lee, Young-In 한국분말야금학회 2016 한국분말재료학회지 (KPMI) Vol.23 No.4

$TiOF_2$, which has remarkable electrochemical and optical properties, is used in various applications such as Li-ion batteries, electrochemical displays, and photocatalysts. In addition, it is possible to utilize the template which is allowed to synthesize fluorine doped $TiO_2$ powders with hollow or faceted structures. However, common synthesis methods of $TiOF_2$ powders have some disadvantages such as the use of expensive and harmful precursors and batchtype processes with a limited production scale. In this study, we report a synthetic route for preparing $TiOF_2$ powders by using an inexpensive and harmless precursor and a continuous ultrasonic spray pyrolysis process under a controlled atmosphere to address the aforementioned problems. The synthesized powder has an average size of $1{\mu}m$, a spherical shape, a pure $TiOF_2$ phase, and exhibits a band-gap energy of 3.2 eV.

축전지 제조업에서 입사 1년 미만 남자 사원들의 연 노출 지표치에 관한 연구

황보영,김용배,리갑수,이성수,안규동,이병국,김정순,HwangBo, Young,Kim, Yong-Bae,Lee, Gap-Soo,Lee, Sung-Soo,Ahn, Kyu-Dong,Lee, Byung-Kook,Kim, Joung-Soon 대한예방의학회 1996 Journal of Preventive Medicine and Public Health Vol.29 No.4

This study intended to obtain an useful information for health management of lead exposed workers and determine biological monitoring interval in early period of exposure by measuring the lead exposure indices and work duration in all male workers (n=433 persons) exposed less than 1 year in 6 storage battery industries and in 49 males who are not exposed to lead as control. The examined variables were blood lead concentration (PBB), Zinc-protoporphyrin concentration (ZPP), Hemoglobin (HB) and personal history; also measured lead concentration in air (PBA) in the workplace. According to the geometric mean of lead concentration in the air, the factories were grouped into three categories: A; When it is below $0.05mg/m^3$, B; When it is between 0.05 and $0.10mg/m^3$, and C; When it is above $0.10mg/m^3$. The results obtained were as follows: 1. The means of blood lead concentration (PBB), ZPP concentration and hemoglobin(HB) in all male workers exposed to lead less than 1 year in storage battery industries were $29.5{\pm}12.4{\mu}g/100ml,\;52.9{\pm}30.0{\mu}g/100ml\;and\;15.2{\pm}1.1\;gm/100ml$. 2. The means of blood lead concentration (PBB), ZPP concentration and hemoglobin(HB) in control group were $5.8{\pm}1.6{\mu}g/100ml,\;30.8{\pm}12.7{\mu}g/100ml\;and\;15.7{\pm}1.6{\mu}g/100ml$, being much lower than that of study group exposed to lead. 3. The means of blood lead concentration and ZPP concentration among group A were $21.9{\pm}7.6{\mu}g/100,\;41.4{\pm}12.6{\mu}g/100ml$ ; those of group B were $29.8{\pm}11.6{\mu}g/100,\;52.6{\pm}27.9{\mu}g/100ml$ ; those of group C were $37.2{\pm}13.5{\mu}g/100,\;66.3{\pm}40.7{\mu}g/100ml$. Significant differences were found among three factory group(P<0.01) that was classified by the geometric mean of lead concentration in the air, group A being the lowest. 4. The mean of blood lead concentration of workers who have different work duration (month) was as follows ; When the work duration was $1\sim2$ month, it was $24.1{\pm}12.4{\mu}g/100ml$, ; When the work duration was $3\sim4$ month, it was $29.2{\pm}13.4{\mu}g/100ml$ ; and it was $28.9\sim34.5{\mu}g/100ml$ for the workers who had longer work duration than other. Significant differences were found among work duration group(P<0.05). 5. The mean of ZPP concentration of workers who have different work duration (month) was as follows ; When the work duration was $1\sim2$ month, it was $40.6{\pm}18.0{\mu}g/100ml$, ; When the work duration was $3\sim4$ month, it was $53.4{\pm}38.4{\mu}g/100ml$ ; and it was $51.5\sim60.4{\mu}g/100ml$ for the workers who had longer work duration than other. Significant differences were found among work duration group(P<0.05). 6. Among total workers(433 person), 18.2% had PBB concentration higher than $40{\mu}g/100ml$ and 7.1% had ZPP concentration higher than $100{\mu}g/100ml$ ; In workers of factory group A, those were 0.9% and 0.0% ; In workers of factory group B, those were 17.1% and 6.9% ; In workers of factory group C, those were 39.4% and 15.4%. 7. The proportions of total workers(433 person) with blood lead concentration lower than $25{\mu}g/100ml$ and ZPP concentration lower than $50{\mu}g/100ml$ were 39.7% and 61.9%, respectively ; In workers of factory group A, those were 65.5% and 82.3% : In workers of factory group B, those were 36.1% and 60.2% ; In workers of factory group C, those were 19.2% and 43.3%. 8. Blood lead concentration (r=0.177, P<0.01), ZPP concentration (r=0.135, P<0.01), log ZPP (r=0.170, P<0.01) and hemoglobin (r=0.096, P<0.05) showed statistically significant correlation with work duration (month). ZPP concentration (r=0.612, P<0.01) and log ZPP (r=0.614, P<0.01) showed statistically significant correlation with blood lead concentration 9. The sl

연폭로 남자 근로자들의 신기능 지표에 관한 연구

이성수,황보영,안규동,이병국,김정순,Lee, Sung-Soo,HwangBo, Young,Ahn, Kyu-Dong,Lee, Byung-Kook,Kim, Joung-Soon 대한예방의학회 1995 예방의학회지 Vol.28 No.2

The influence of lead exposure on renal function was studied. Eighty nine lead exposed workers who worked in 2 storage battery factories, and seventy one control workers were chosen for this study. Blood lead(PbB) and zinc protoporphyrin in whole blood(ZPP) were selected as indicators of lead exposure. As indicators of renal function, urinary N-acetyl-$\beta$-D-glucosaminidase(NAG), blood urea nitrogen(BUN), serum creatinine(S-Cr), total protein in urine(U-TP),and serum uric acid(S-Ua) were selected. The results obtained were as follows: 1. While the mean values of lead exposure indicators of lead workers were significantly different from non-exposed ones, the mean values of NAG, U-TP, BUN and S-Cr of renal function indicators of exposed were also significantly different from non-exposed but their mean values were all within normal limits. 2. BUN, logarithmic U-TP, logarithmic NAG and S-Cr showed statistically significant correlation with PbB. 3. The proportion of workers whose values of renal function indicators were over the normal limits(NAG7.5 U/g Cr ; U-TP10.9 mg/dl ; BUN20 mg/dl ; S-Crl.2 mg/dl ; S-Ua7.0 mg/dl) by the level of lead absorption in terms of PbB and ZPP were calculated. The proportion of workers with over the normal limits of U-TP among total workers showed the dose-response relationship. When age is adjusted, U-TP showed significantly strong dose-response relationship with the level of PbB and ZPP.

연 축전지 사업장의 질환 요주의자 및 유소견자의 사후관리 실태 연구

리갑수,황보영,김용배,김화성,함정오,이성수,안규동,이병국,허정,Lee, Gap-Soo,HwangBo, Young,Kim, Yong-Bae,Kim, Hwa-Sung,Ham, Jung-Oh,Lee, Sung-Soo,Ahn, Kyu-Dong,Lee, Byung-Kook,Hur, Jung 대한예방의학회 1996 예방의학회지 Vol.29 No.4

연 업종별 보건관리 대행기관에 의해 근로자의 보건 관리를 하고 있는 5개 연 축전지 회사의 전체 근로자들 중 1995년에 일반 건강진단 및 특수 건강진단을 동시에 시행한 전체 1,919명의 근로자 중에서 C(건강관리 상 계속 관찰이 필요한자)와 D(유소견자)의 판정을 받은 365명의 근로자들을 대상으로 하여 이들 중 퇴직자 35명, 조사 기간중 출장, 휴직 및 야간 근무자 8명, 그리고 조사에 응하지 않은 근로자 29명 등 총 72명을 제외한 293명을 대상으로 설문 및 1995년도 일반 및 특수 건강진단 결과표를 통하여 건강진단 결과에 따른 사후관리 조치실태 및 관련 요인들을 조사하였다. 결과를 요약하면 다음과 같다. 1. 요주의자 이상근로자의 86%가 건강진단결과표를 받았으나 이에 대한 교육설명이 제대로 이루어지지 않았고, 자신의 건강진단 결과를 잘 알고 있지 못하였다. 2. 사후관리 조치가 있었던 근로자는 23%로 낮았으며, 사후관리조치의 내용은 단순한 추적관찰이 가장 많았다. 3. 조사대상 근로자들은 현재의 건강진단은 필요하지만 형식적이라고 하였다. 4.사후관리 조치의 유무를 피설명변수로 한 로지스틱 회귀분석에서 유의한 설명 변수는 건강진단 결과에 대한 설명의 유무뿐이었다. To evaluate the follow-up management state and related factor of lead battery workers in periodic health examination as part of program of group occupational health service, author studied 293 workers with questionnaire on knowledge of results and follow-up management state and related factors, and compared the responses to their periodic health examination result charts. The results were as follows: 1. 252(86%) workers responsed that they had received the health examination result chart, but only 116(39.6%) workers responsed that they had been educated or explained about the results of health examination, and 11(57.9%) workers among 19 workers with non-occupational disease D, 101(44.3%) workers among 228 workers with non-occupational disease C, and 19(28.4%) workers among 67 workers with occupational disease C knew accurately their health examination results. 2. 78(24.8%) of the workers responsed that they had follow-up management, and contents of follow-up management were follow-up(36.6%), out-patient treatment (31%), change worksite(8.5%), temporary retirement(7.0%) and others(16.9%). 3. Most of the workers responsed that the health examination were necessary, but three-fourths of the workers responsed that the health examination had been superficial or that they didn't know. 4. In this study, follow-up management show significant association with only explanation or education about health examination result chart.