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고압멸균 처리시간에 따른 닭 체내 조류인플루엔자와 뉴캐슬병 바이러스의 멸균효과
이진주 ( Jin Ju Lee ),김동혁 ( Dong Hyeok Kim ),임정주 ( Jeong Ju Lim ),김대근 ( Dae Geun Kim ),민원기 ( Won Gi Min ),이후장 ( Hu Jang Lee ),장홍희 ( Hong Hee Chang ),김석 ( Suk Kim ) 한국예방수의학회(구 한국수의공중보건학회) 2011 예방수의학회지 Vol.35 No.4
Avian influenza (AI) and Newcastle disease (ND) distress a variety of avian species, especially domestic poultry. Severe syndromes are caused by highly virulent specific virus strains termed highly pathogenic AI and velogenic ND viruses, which are potential agrobioterrorism agents. This outbreak emphasizes the need for continuing cooperation between public health and veterinary medical communities in controlling AI and ND when it has a zoonotic potential. Up to date, the stamping out and burying system were applied for controlling methods against these highly infectious diseases in the ordinary way, however these methods had many environmental problems, including leachat and effluvium. Thus, we assessed that sterilization effect of AI and ND virus dependent on several treatment conditions, such as autoclaving time and cutting types of chicken. As a result, we found that the cutting type of chicken meat revealed a reduced HA titer (20) against both of AI and ND virus after 10 min of autoclaving, while whole chicken showed same titer after 30 and 60 min. Therefore, we propose that the conditions of treatment on infected chicken should be developed for convenient, affordable, and effective prevention methods against for AI and ND.
냉동 건조 탈회 동종골 이식후 골막이 골 형성 과정에 미치는 영향에 관한 실험적 연구
이동근,엄인웅,민승기,권혁도 大韓顎顔面成形再建外科學會 1995 Maxillofacial Plastic Reconstructive Surgery Vol.17 No.4
Periosteum in general is described as a specialized fibrous membrane of mesenchymal origin consisting of two basis layers : outer fibrous layer consists of irregularly arranged dense connective-tissue with fibroblasts, and inner osteogenic or cambial layer is composed of more loosely arranged fibers, greater vascularity and flatted spindle-shaped pre-osteoblasts. This periosteum may serve in controlling bone growth, especially mandibular growth has been emphasized. But, the periosteum enwrapping the facial skeleton have been studied for many years leaving a controversy in opinion regarding the function of these structures. We evaluated the bone formation activity of te periosteum in allogeneic bone grafts which bones are made of freeze-dried preparation preoperatively. We made the calvarial bone defects, 5×7mm sized, amd grafted with allogeneic bone in rats, which a half of specimens has dissected the overlying periosteum and a rest intacted. After bone grafting, we evaluated the capacity ofbone formation of periosteum, 1, 2, 4, 6, 8 weeks postoperatively. There are subtle differences of bone formation during early healing period after demineralized allogeneic bone grafting between control groups with periosteum and experimental groups without periosteum.
전립선암과 전립선비대증 환자에서 혈청 유리 및 총전립선특이항원 측정의 의의
서혁준,박형민,권태균,정성광,김법완,이재태 경북대학교 의학연구소 2000 경북대학교병원의학연구소논문집 Vol.4 No.1
Purpose: This study was peformed to investigate whether the free to total PSA ratio(F/T PSA ratio) offers a better discriminant for the detection of patient with prostatic cancer(CaP) and those with benign prostatic hyperplasia(BPH) than serum total PSA alone. Materials and Methods: From September 1996 to February 1999, free and total PSA levels were measured on frozen sera samples of 154 men with BPH and 46 with CaP using immunoradiometric assay. Results: In all subjects, the mean total PSA was significantly higher in CaP group(72.57±66.58ng/ml) than BPH group(3.12±4.10ng/ml). The mean PSAD was significantly higher in CaP group(1.64± 1.86) than BPH group(0.08±0.01). The mean F/T PSA ratio was significantly lower in CaP group(0.19± 0.07) than BPH group(0.30±0.13). Among 41 subjects whose total PSA were between 4-20ng/ml, the mean PSAD was significantly higher in CaP group(0.37±7.16) than BPH group(0.17± 0.07), but the mean F/T PSA ratio was not significantly different between CaP(0.19± 0.10) and BPH group(0.25±7.13). By comparing the sensitivity and specificity of total PSA alone, PSAD and F/T PSA ratio on receiver operating characterislic (ROC) Cutie in all subiects and subiects with total PSA between 4-20ng/ml, F/T PSA ratio had no superiority than total PSA alone and PSAD for discrimination between CaP and BPH. Conclusions: We suggest that the F/T PSA ratio is not superior to total PSA alone and FSAD in the detection of prostatic cancer, and further evaluation of the usefulness of F/T PSA ratio should be required.
김의영,임승혁,이재학,강민철 龍仁大學校 武道硏究所 2004 武道硏究所誌 Vol.14 No.2
The purpose of this study was to determine the relationship of demographic characteristics to job stress among security guards. The subjects in this study were 474 people selected by random cluster sampling from a population that consisted of private bodyguards and security guards from Seoul, Gyeonggi province and Daejeon. They gave a faithful response when a survey was conducted, and incomplete answer sheets from the others of the population were excluded. For data analysis, SPSS/PC Windows V11.0 program was utilized, and frequency analysis, t-test, one-way ANOVA and Scheffe posttest were employed. The findings of this study were as follows: First, the gender of the security guards investigated made a significant difference to their job satisfaction(p<.05). Job characteristics, compensation and organizational characteristics put higher strain on the men than on the women, and the latter group was more stressed out about their roles and interpersonal relations. Second, their age, education, years of services and monthly income made a significant difference to their job stress subvariables related to job characteristics, roles, human relations, compensation and organizational characteristics(p<01). Third, their job stress was significantly different according to their position and status(p<01). Specifically, those who had no position were under heavier pressure due to job characteristics, roles, interpersonal relations, compensation and organizational characteristics.
Ki-Kang Kim,Soo-Min Kim,Yan Cui,Mun-Seok Jeong,Jong-Hun Han,Young-Chul Choi,Kay-Hyeok An,Kyung-Hui Oh,Young-Hee Lee 한국탄소학회 2009 Carbon Letters Vol.10 No.1
We measured the degree of macrodispersion of the various single-walled carbon nanotubes (SWCNTs) and multi-walled carbon nanotubes (MWCNTs) using UV-VIS-NIR absorption spectroscopy. CNTs were dispersed with SDS of 2 wt % in deionized water using the homogenizer and then were further centrifugated at 6000 g for 10 min. The degree of macrodispersion, expressed by Dm(λ)=Aa(λ)/Ab(λ)*100 (%), where λ is the wavelength and Aa(λ) and Ab(λ) are the absorbance of the sample after and before centrifugation, respectively. In the case of MWCNTs, we evaluated the degree of macrodispersion by the average degree of macrodispersion (Dm(λ)) between 1000 and 1200 nm. The degree of macrodispersion of SWCNTs was evaluated at the wavelength in which van Hove singularity-related transition regions were excluded, i.e., the range was chosen between E11S and E22S peaks. We have estimated six samples with the same method. The standard deviation of each sample was lower than 5. Therefore, we presented a reliable evaluation method for the macrodispersion of CNTs for standardization.
A Study on Ganui-Dae's External Form and Its Modeling for Restoration
Lee, Min-Soo,Lee, Yong Sam,Jeon, Jun Hyeok,Kim, Sang Hyuk 한국우주과학회 2013 Journal of Astronomy and Space Sciences Vol.30 No.4
Ganui-Dae, built in the reign of King Sejong, Joseon Dynasty, is a comprehensive observatory. It has various instruments for observation and time signal such as Ganui, Gyupyo(Gnomon), water-hammering type Honui and Honsang, and so on. Studying on Ganui-Dae has been focused on its location, history, criterion, etc, so far. However, studying on its external form and construction method has been conducted insufficiently. This study suggests the model for restoration of Ganui-Dae. The model is based on the analysis about external form of Ganui-Dae in various antique maps, and its construction method in those days.
화산석을 담체로 한 Biofilter 에서 황화수소 제거 특성
이병헌,이민규,김중균,권성현,최혁,빈정인 한국화학공학회 2001 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.39 No.3
생물학적 탈취법은 에너지절약과 아울러 유지관리가 용이하여 기존의 물리화학적 처리법에 대한 대체 방법으로 주목을 끌고 있다. 화산석과 Bacillus sp.가 충전된 바이오필터를 이용하여 H₂S 제거에 대한 유입농도와 공탑접촉시간(EBCT, Empty Bed Contact Time)의 영향을 평가하고 최대제거용량 산정을 위한 다양한 실험을 수행하였다. 화산석 입자 크기가 5.6-10 ㎜ 인 경우에 0.25m/s의 유속에 대해 13.4㎜H₂O/m의 압력손실이 측정되었다. 화산석과 Bacillus sp.를 사용한 바이오필터는 유입농도 250 ppmv에서 EBCT 8.2-60 sec의 범위에서 99% 이상의 안정된 제거효율을 유지하였다. 또한 체류시간을 5.5 sec로 감소시킨 결과 H₂S 제거효율은 약 10% 감소하였고 이때의 H₂S 제거용량은 254 g-H₂S/㎥/hr로 산정되었다. 일정한 유입 유량 15.2 L/min(선속도는 0.04 m/sec)의 조건에서 유입농도가 30-1,100 ppmv의 경우 H₂S 제거효율은 99.97% 이상이였다. Biological deordorization receives attracting attention as an alternative method to physical and chemical treatment, mainly because of its energy-saving and easy maintenance features. A biofilter packed with scoria, and inoculated with Bacillus sp. as H₂S oxidizer was used to remove hydrogen sulfide in the air stream. Various tests have been conducted to evaluate the effect of H₂S inlet concentration and EBCT (Empty Bed Contact Time) on H₂S elimination, and to determine the maximum elimination capacity. The pressure drop in the biofilter packed with particles of size range from 5.6 to 10 ㎜ was 13.4 ㎜H₂O/m at a representative gas velocity of 0.25 m/s. Biofilter showed the stable removal efficiencies of over 99% under the EBCT range from 8.2 to 60 sec at the 250 ppmv of H₂S inlet concentration. When the retention time was reduced to 5.5 sec, the H₂S removal efficiency decreased by about 10 percent and the H₂S elimination capacity was 254 g-H₂S/㎥/hr. The removal efficiencies of over 99.9% were observed in the range of inlet H₂S concentration from 30 to 1,100 ppmv at a constant gas flow rate of 15.2 L/min (linear velocity, 0.04 m/sec).