연취급 근로자들의 건강증진에 미치는 호흡용 보호구 및 생물학적 모니터링의 효과

심윤보,이병국 大韓産業醫學會 1992 대한직업환경의학회지 Vol.4 No.1

For the purpose of investigating the effect of respiratory protection with biological monitoring on the improvement of workers' health, authors selected one storage battery factory which was scheduled to move to a new modernized factory within 2 years. Maintenance free respirators were provided to all of the workers at the beginning of this study for the respiratory protection. Zinc protoporphyrin (ZPP) in whole blood was chosen as an index of biological monitoring and was measured regularly once a month throughout 1 year-study period. Blood lead (PBB), δ -aminolevulinic acid in urine (ALAU), hemoglobin, hematocrit, lead related symtoms and other personal data were also checked twice at the beginning and the end of this study, respectively. Fourteen questionnaires of lead absorption were completed by each worker twice at the beginning and the end of this study, respectively. Out of 214 workers, authors analysed the data of 147 workers who stayed during the study period from the beginning to the end of this study, and the results obtained were as follows : 1. The percentages of workers whose blood lead was over 60 ug/dl and blood ZPP over 150 ug/dl which were the criteria for the diagnosis of lead poisoning in Safety and Health Act of Korea decreased from 237% and 23.0% at the beginning of the study to 1.3% and 1.9% at the end of the study, respectively. 2. There were significant differences of mean value in blood lead, ALAU, ZPP and overall prevalence rate of lead related symptoms between the beginning and the end of the study, but there were no differences of mean value in hemoglobin and hemotocrit between two periods. 3. While the most frequent three symptoms in male workers were "feeling tired generally", "loss of weight" and "numbness of fingers, hands or feet" in order, those in female workers were "numbness of fingers, hands or feet", "feeling tired generally" and "loss of weight" in order of frequency. 4. The prevalences of two symptoms ("cann't sleep well" and "loss of weight") increased significantly by the increase of blood lead of workers. 5. The prevalences of six symptoms ("anorexia", "numbness of fingers. hands or feet", "weakness of fingers, hands or feet" "joint pain" and "feeling tired generally") increased significantly by the increase of blood ZPP of workers. 6. The variable which showed highest correlation with overall prevalence of lead related symptoms was blood ZPP and there was also significant correlation between symptom prevalence and blood lead and ALAU. 7. There were negative correlations between symptom prevalence and age and work duration. As the age and the work duration of workers increased the symptom prevalences were decreased accordingly. 8. Stepwise multiple regression analysis, using overall symptom prevalence as a dependent variable and blood lead. ALAU, hemoglobin. hematocrit, work duration. age, sex as independent variables, indicated that only blood ZPP and age were significantly contributed to the dependent variable. With above results it was confirmed that respiratory protection with biological monitoring using blood ZPP could improve workers' health by reducing the degree of lead exposure, and blood ZPP was found to be the most relevant index to lead related symptoms.

한국인에서 CC-SIT와 비교한 KVSS Test의 임상적 유용성 평가 : 예비연구 Pilot study

김진국,장현종,임채형,남태욱,심대보 건국대학교 의과학연구소 2003 건국의과학학술지 Vol.13 No.-

Background and Objectives: Sniffin' Sticks test is the test of nasal chemosensory performance based on pen-like odor dispensing devices. KVSS(Korean Version of Sniffin' Sticks) Test was developed as the "Korean olfactory test" using the odorants which are familiar to Korean. Authors evaluated the clinical validity of KVSS Test compared with CC-SIT (Cross-Cultural Smell Identification Test) in Korean. Materials and Methods: The subjects of this study were 25 normosmic volunteers who were divided into five groups according to age. Each group was 5 normosmic volunteers. And they consisted of 12 men and 13 women. KVSS Test and CC-SIT were used for the evaluation of olfactory function. Results: Our study showed the negative correlation between age and olfactory function test (CC-SIT score, KVSS Test I score and KVSS Test II score). Normosmia rate of KVSS Test was more higher than that of CC-SIT. Also KVSS Test had more familiar items for Koreans compared with that of CC-SIT. CC-SIT score and KVSS Test score showed showed the positive corrclation. And each test revealed high reliability in test-retest evaluation. Conclusion: The KVSS Test can be used as an olfactory function test for Koreans.

비·부비동 양성 종양의 임상적 고찰

김진국,신향애,임채형,장현종,심대보 건국대학교 의과학연구소 2004 건국의과학학술지 Vol.13 No.-

Background and Objectives: Benign tumors of the nose and paranasal sinues are rare in comparison with malignant growths. Authors aimed to investigate the incidence and characteristics of benign sino-nasal tumors. Materials and Methods: From 1994 through 2004, 25 cases of benign sino-nasal tumors (17 men and 8 women) were diagnosed and cared at the Department of Otorhinolaryngology-Head and Neck Surgery, College of Medicine, Konkuk University. We reviewed medical records of patients to find out clinical features, radiologic findings, operative findings, therapeutic options, and outcomes. Postoperative observation was given for fifteen months on the average. Results: The most common symptom was nasal obstruction, followed by nasal mass, frequent nasal bleeding, headache, and rhinorrhea, and the mass mainly placed in the lateral nasal wall. There were 12 cases (48%) of inverted papilloma, 4 (16%) cases of squamous papilloma, 4 (16%) cases of hemangioma, 1 (4%) case of pleomorphic adenoma, 1 (4%) case of leiomyoma, 1 (4%) case of lipoma. All the tumors were surgically removed. For the treatment of inverted papilloma, medial maxillectomy had been performed before 1997(2 cases); however, most cases have been managed with endonasal endoscopic technique since 1997. Recurrence was observed in two patients with inverted papilloma and one patients with squamous papilloma. Conclusion: Inverted papilloma is the most common benign tumor in the nose and paranasal sinuses, followed by squamous papilloma and hemangioma. The optimal management of benign tumors is complete excision of tumor and endonasal endoscopic surgery is an effective treatment for an inverted papilloma.

Regrowth of diluted magnetic semiconductor GaMnAs on InGaP (001) surfaces to realize freestanding micromechanical structures

Choi, Hyung Kook,Lee, Joon Sue,Cho, Sung Woon,Lee, Won Oh,Shim, Seung Bo,Park, Yun Daniel American Institute of Physics 2007 JOURNAL OF APPLIED PHYSICS - Vol.101 No.6

Oxidation State of Manganese in LiMn₂O₄ Powders and Its Effect on Electrochemical Properties

Kim, Seon Hye,Lee, Kook Jae,Shim, Kwang Bo,Kim, Chang Sam Trans Tech Publications, Ltd. 2007 Materials science forum Vol.534 No.-

<P>Lithium manganese oxide (LiMn2O4) powders for lithium ion batteries were synthesized from two separate raw material pairs, LiOH/MnO and LiOH/MnO2. The prepared powders and their electrochemical properties were investigated. Powders calcined at 780°C were composed of a single-phase spinel structure but those treated at 850°C showed a higher intensity ratio of I400 to I311, a slightly larger lattice parameter, and an increased discharge capacity by 10% under 3.0~4.3V voltage range. The XPS study on the oxidation states of manganese repealed that powders made from LiOH/MnO had less Mn3+ ion and gave better battery performances than those from LiOH/MnO2.</P>

Effects of Air Blast Thawing Combined with Infrared Radiation on Physical Properties of Pork

Hong, Geun-Pyo,Shim, Kook-Bo,Choi, Mi-Jung,Min, Sang-Gi Korean Society for Food Science of Animal Resource 2009 한국축산식품학회지 Vol.29 No.3

This study investigated the effects of infrared (IR) radiation combined with air blast thawing on the physical properties of pork. Regardless of air velocity, increasing IR dosage produced an exponential increase in the thawing rate of pork. This rate increased further when air blast velocity was increased. IR treatments showed significantly lower thawing loss than that of 0 Watt treatment, while increasing air velocity significantly increased thawing loss of pork (p<0.05). Increasing both IR power and air velocity tended to decrease the cooking loss of pork. Moreover, increased IR power tended to decrease the water holding capacity and shear force of pork. The shear force changes were not significant (p>0.05). Shear force also increased with increasing air velocity. In addition, the higher the air velocity the higher the shear force of pork. In Commission Internationale de l'Eclairage (CIE) colour determination, control of temperature prevented discolouration from overheating of sample surface. The results suggest that IR dosage combined with air blast has potential in thawed meat quality aspects, and that humidity control could prevent surface drying.

초고압 동결 및 해동방법이 돈육의 물리적 특성에 미치는 효과

심국보,홍근표,최미정,민상기,Shim, Kook-Bo,Hong, Geun-Pyo,Choi, Mi-Jung,Min, Sang-Gi 한국축산식품학회 2009 한국축산식품학회지 Vol.29 No.6

This study was conducted to investigate the effect of various high pressure freezing and thawing treatments on the physical properties of pork. To compare the effects of the freezing and thawing process on meat quality, atmospheric freezing followed by running water thawing (AFRT), pressure shift freezing followed by running water thawing (SFRT), and pressure shift freezing and pressure assisted thawing (SFAT) were conducted at pressure of 250 MPa and cooling temperature of $-22^{\circ}C$. SAFT and SFRT showed a shorter phase transition time and total thawing time than AFRT. The pH value of treated samples increased significantly (p<0.05) compared to unfrozen meat. In addition, SFAT and SFRT showed a higher pHvalue than AFRT. Although the water holding capacity was significantly decreased (p<0.05) for SFAT and SFRT, SFRT reduced drip loss. In regards to color, SFAT and SFRT resulted in a significant increase in color parameters (p<0.05) relative to AFRT, while SFAT produced a higher L*-value. High pressure treatment significantly increased shear force (p<0.05) compared to AFRT, and, where SFRT showed the highest shear force. Therefore, these combined results indicated that the hydrostatic pressure treatment improved the functional properties of pork and increased the freezing and thawing rate.

Oxidation State of Manganese in LiMn2O4 Powders and its Effect on Electrochemcal Properties

Kim Seon-Hye,Lee Kook-Jae,Shim Kwang-Bo,Kim Chang-Sam 한국분말야금학회 2006 한국분말야금학회 학술대회논문집 Vol.2006 No.1

[ ] powders for lithium ion batteries were synthesized from two separate raw material pairs of LiOH/MnO and . The powders prepared at 780 and and their difference of electrochemical properties were investigated. Both powders calcined at 780 and were composed of a single-phase spinel structure but those treated at showed a lower intensity ratio of to , a slightly larger lattice parameter, and an increased discharge capacity by 10% under voltage range. The XPS study on the oxidation states of manganese repealed that powders made from LiOH/MnO had less ion and gave better battery performances than those from .

Effects of Thermal Processing Combined with High Pressure on the Characteristics of Cooked Pork

홍근표,심국보,최미정,민상기,Hong, Geun-Pyo,Shim, Kook-Bo,Choi, Mi-Jung,Min, Sang-Gi Korean Society for Food Science of Animal Resource 2008 한국축산식품학회지 Vol.28 No.4

This study evaluated the effects of thermal processing combined with high pressure on the properties of cooked pork. Pressurization followed by heating (PFH), heating followed by pressurization (HFP) and heating under pressurization (HUP) treatments were compared to a heated only control. Cooked meat without simultaneous pressurization showed little or no decrease in water binding properties relative to the control, regardless of the sequence of pressurization and heating. However, HUP treated pork had significantly higher water binding properties than the control (p<0.05). The pH values of all treatments were not significantly different with the exception of HUP at 300 MPa. The HUP treated pork showed the best tenderizing effects among all the treatments tested and the effect was more significant at increased pressure levels (p<0.05). In addition, increasing pressure levels significantly increased the L-values of pork (p<0.05). PFH and HFP treated pork had significantly lower a-values (p<0.05), while no significant differences were observed in HUP. HUP treated pork had the lowest b-values at 100 MPa. however, the differences were not significant at increasing pressure levels. These results indicate that heating under pressure is the best cooking condition for improving the quality characteristics of pork without adversely affecting its appearance.

Hetero-epitaxial ZnO 버퍼층이 As-doped ZnO 박막의 증착조건에 미치는 영향

이홍찬 ( Hong Chan Lee ),최원국 ( Won Kook Choi ),심광보 ( Kwang Bo Shim ),오영제 ( Young Jei Oh ) 한국센서학회 2006 센서학회지 Vol.15 No.3