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오늘 본 자료
Sang-Joong Jung,Young-Dong Lee,Yong-Su Seo,Wan-Young Chung 제어로봇시스템학회 2008 제어로봇시스템학회 국제학술대회 논문집 Vol.2008 No.10
This paper describes the designation of a real-time, wearable reflectance pulse oximetry based on a wireless sensor network. In order to monitor human physiological signals continuously, wearable reflectance pulse oximetry is built in wrist form that could used to obtain oxygen saturation of a patient unobtrusively. The wearable reflectance pulse oximetry consists of reflectance probe, SpO2 module and wireless sensor node. The reflectance probe is designed to collaborate with LEDs with wavelengths of 660nm and 940nm. SpO2 module is designed to manage almost of all of the internal processing (e.g. analog signal processing, signal collection and calibration, etc). It is based on a low-power 8 bit ATmega128L microcontroller that operates in 3V. Low-power processing SpO2 module was integrated on wireless sensor node for wireless communication. The oxygen saturation collected from wireless sensor node was transmitted wirelessly to a base-station for storage and display purposes. This paper focused on the successful integration of all these components into wearable reflectance pulse oximetry and performed its ability to measure patient’oxygen saturation for ubiquitous healthcare system
( Seo Hyun Lee ),( Dong Wan Seo ),( Tae Jun Song ),( Do Hyun Park ),( Sang Soo Lee ),( Sung Koo Lee ),( Myung Hwan Kim ) 대한내과학회 2014 대한내과학회 추계학술대회 Vol.2014 No.1
The aim of this study was to evaluate the utility of endoscopic ultrasound (EUS) guidance and percutaneous ethanol lavage for the treatment of symptomatic large benign liver cysts. Here, we describe patients with large, liver cysts who experienced complete resolution following cyst drainage and alcohol ablation. From April 2009 to October 2012, 17 patients with 19 hepatic cysts were enrolled. Patients underwent ethanol lavage via percutaneous and/or EUS-guided approaches. Residual cysts were monitoredby computed tomography. The median cyst volume before therapy was 368.9 ml (interquartile range, 195.3-795.9 ml). Ten cysts were drained by the percutaneous approach with a pigtail catheter and eight cysts underwent EUS-guided aspiration and lavage treatment. In one case, both the percutaneous approach and EUS-guided puncture was used due to septation with calcifi cations within the cyst. During the median 11.5-month follow-up (interquartile range, 7.8-22.6 months) of the percutaneous approach group, the cysts showed 97.5% reduction. During the median 15-month follow-up (interquartile range, 9.8-19.9 months) of the EUS-guided group, the cysts showed nearly 100% reduction. Percutaneous catheter drainage ethanol lavage was more feasible for right-sided, larger cysts, whereas the EUS-guided approach was useful for left lobe cysts. EUS-guided ethanol lavage could also be performed in a onestep approach without the hassles of catheter insertion, with repeated aspiration for polycystic diseases possible. Conclusion: Excellent symptomatic and radiological responses and long-term results were achieved with percutaneous catheter drainage and EUS-guided ethanol lavage. EUS-guided hepatic cyst lavage could be considered as a primary method of treatment with a high degree of technical feasibility and safety. Careful patient selection and tailored approaches for large, symptomatic hepatic cysts may signifi cantly improve outcomes.
Amberlite IRA-900을 이용한 cyclodextrin glucotransferase의 최적 고정화
Seo, Hyo-Jin,Jung, Il-Hyong,Nam, Soo-Wan,Kim, Byung-Woo,Kim, Sung-Koo Korean Society of Life Science 2004 생명과학회지 Vol.14 No.5
Bacillus subtilis NAl/pKBl으로부터 생산된 cyclodextrin glucanotransferase (CGTase)는 cyclodextrin (CD)의 생산에 이용되었으며, 이에 사용된 CGTase는 ion-exchange chromatography와 gel filtration chromatography에 의해 정제되었다. 정제된 CGTase는 pH 6.0-7.0 범위, 60-$70^{\circ}C$에서 최대 활성을 나타내었으며, 다양한 이온결합성 고정화 담체를 이용하여 정제 효소의 고정화를 실시한 결과, 강염기성 음이온교환수지인 Amberlite IRA-900이 가장 우수한 고정화 효율을 나타내었다. 고정화된 효소는 pH 6.0, $60^{\circ}C$에서 최대 활성을 나타내었고, 그 활성이 약 1개월간 유지되어 cyclodextrin을 생산하기 위한 연속반응기내에서 장기간 사용이 가능함을 알 수 있었다. Cyclodextrin glucanotransferase (CGTase) produced by Bacillus subtilis NAl/pKBl was used for the production of cyclodextrin (CD). The enzyme was purified by ion exchange and gel filtration chromatography. The purified enzyme exhibited its maximum activity in the pH range of 6.0 to 7.0 and temperature range of 60 to $70^{\circ}C$. Immobilization of purified CGTase was carried out with various immobilization matrices. Amberlite IRA-900, a strong basic anion exchange resin, showed the highest immobilization ability (38 units per gram resin). Optimal pH and temperature for enzymatic reaction of the immobilized CGTase were pH 6.0 and 60t. The activity of immobilized CGTase maintained more than a month and could be reused for a month in a continuous enzyme reactor for the production of CD.
Evaluating Soil Carbon Changes in Paddy Field based on Different Fraction of Soil Organic Matter
Seo, Myung-Chul,Cho, Hyeon-Suk,Kim, Jun-Hwan,Sang, Wan-Gyu,Shin, Pyeong,Lee, Geon Hwi 한국토양비료학회 2015 한국토양비료학회지 Vol.48 No.6
Organic matter plays important roles in soil ecosystem in terms of carbon and nitrogen cycles. Due to recent concerns on climate change, carbon sequestration in agricultural land has become one of the most interesting and debating issues. It is necessary to understand behavior of soil carbon for evaluating decomposition or sequestration of organic matter and analyzing potential carbon decomposition pattern about the kinds of organic matter sources to cope with well. In order to evaluate decomposition of soil carbon according to organic material during cultivating rice in paddy field, we treated organic material such as hairy vetch, rice straw, oil cake fertilizer, and manure compost at $50{\times}50{\times}20cm$ blocks made of wood board, and analyzed carbon contents of fulvic acid and humic acid fraction, and total carbon periodically in 2013 and 2014. Soil sampling was conducted on monthly basis. Four Kinds of organic matter were mixed with soil in treatment plots on 2 weeks before transplanting of rice. The treatment of animal compost showed the highest changes of total carbon, which showed $7.9gkg^{-1}$ in May 2013 to $11.6gkg^{-1}$ in October 2014. Fulvic acid fraction which is considered to easily decompose ranged from 1 to $2gkg^{-1}$. Humic acid fraction was changed between 1 to $3gkg^{-1}$ in all treatments until organic material had been applied in 2014. From May to August in the second year, the contents of humic acid fraction increased to about $4gkg^{-1}$. The average of humic fraction carbon at treatments of animal compost was recorded highest among treatments during two years, $2.1gkg^{-1}$. The treatment of animal compost has showed the lowest ratio of fulvic acid fraction, humic acid fraction compared with other treatments. The average ratio of fulvic fraction carbon in soil ranged from 16 to 20%, and humic fraction carbon ranged from 19 to 22%. In conclusion, animal compost including wood as bulking agent is superior in sequestrating carbon at agricultural land to other kinds of raw plant residue.
Incidence rate of Aneurysmal SAH in Gwangju City and Jeollanamdo Province in 2007
Seo, Bo-Ra,Kim, Tae-Sun,Joo, Sung-Pil,Jang, Suk-Jung,Lim, Jun-Seob,Oh, Chang-Wan The Korean Neurosurgical Society 2010 Journal of Korean neurosurgical society Vol.47 No.2
Objective : The incidence of subarachnoid hemorrhage (SAH) worldwide varies considerably. In spite of many reports about the incidence of SAH, there has been no report about the incidence of SAH on the basis of the Korean population. The purpose of this hospital-based study was to assess the actual incidence rates of aneurysmal SAH in Gwangju city and Jeollanamdo province. Methods : All cases of SAH confirmed by computerized tomography (CT) between January 2007 and December 2007 were selected for analysis. For the data collection, three major training hospital and ten general hospitals working the CT in Gwangju city and four major general hospitals in Jeollanamdo province participate in this study. Results : According to the official census of Korea, the population was 1,413,444 in Gwangju city and 1.929,836 in Jeollanamdo province in 2007. There were 163 patients in Gwangju city and 266 patients in Jeollanamdo province confirmed SAH by CT in 2007. The crude and the age- and sex-adjusted annual incidence rates per 100,000 population for all ages in Gwangju city were 11.5 and 12.4 for aneurysmal SAH and in Jeollanamdo province were 13.8 and 10.8. The incidence was higher in women and increased with age. The gender distribution varied with age. At young ages. the incidence was higher in men while after the age of 40 years, the incidence was higher in women. Conclusion : In the present study, the age- and sex-adjusted annual incidence rates is 11.8 in Gwangju city and Jeollanamdo province. The incidence was higher in women and increased with age.
Thermoluminescence and Photostimulated Luminescence in SrCl2:Eu2+, Na+ Phosphors
Sung-Hwan Kim,Hee-Dong Kang,Chan-Jung Kim,Do-Sung Kim,Hyo-Jin Seo,Sih-Hong Doh,Wan Kim 한국물리학회 2003 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.42 No.1
Thermoluminescence (TL), photostimulated luminescence (PSL), and photoluminescence (PL) in Eu2+ and Na+ co-doped SrCl2 were investigated in order to characterize the optical storage properties of this material. All of the PSL, PL, and TL emission spectra are located in the range of 380440 nm, peaking at 408 nm. The PSL in SrCl2:Eu2+, Na+ is due to the 4f65d!4f7 transition of Eu2+. The TL glow curve of the sample has a single glow peak around 377 K. The activation energy of the PSL trapping centers is in agreement with that of the TL trapping center within the experimental error. The activation energy was about 0.79 eV. The trapping centers giving rise to the PSL are probably identical to those giving rise to the TL.
( Seo Byoung Joo ),( V. J. Rejish Kumar ),( Rather Irfan Ahmad ),( Byung Chun Kim ),( Wan Park ),( So Deuk Park ),( Se Eun Kim ),( Sang Dal Kim ),( Jeong Heui Lim ),( Yong Ha Park ) 한국미생물 · 생명공학회 2012 Journal of microbiology and biotechnology Vol.22 No.1
The biological control efficacy of a greenhouse soil bacterial mixture of Lactobacillus farraginis, Bacillus cereus, and Bacillus thuringiensis strains with antinematode activity was evaluated against the root-knot nematode Meloidogyne incognita. Two control groups planted in soil drenched with sterile distilled water or treated with the broadspectrum carbamate pesticide carbofuran were used for comparison. The results suggest that the bacterial mixture is effective as a biocontrol agent against the root-knot nematode.