http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
발광다이오드를 이용한 광질과 일장조절이 '딕시 화이트' 미니 시클라멘의 개화와 생장에 미치는 영향
허정욱,이춘우,백기엽 충북대학교 첨단원예기술개발연구센터 2000 연구보고서 Vol.5 No.-
The study was conducted to investigate the effect of different light qualities and day lengths controlled by using Light-Emitting Diode (LED) of blue, red, or blue plus red provided by LED System on flowering and growth of F1 Cyclamen miniature. Cyclamen persicum 'Dixie White' seedlings which have raised for 170 days after sowing were grown under conditions of 20° C air temperature and 60% relative humidity. Day length was controlled by blue, re, or blue plus red light (1:1 in energy ratio) with 10 or 12 hr for 63 days. Photosynthetic photon flux in the treatments with 10 or 12 hr was about 100 or 83 μmol m-2 s-1, respectively. Fluorescent lamp treatment of 12 hr day length was considered as a control. Flowering and growth in all the treatments were significantly affected by light quality or day length tested in the experiment. Number of flowers, which opened above the leaf canopy, was higher in red light treatment with 10 hr day length than that in control. Days to flowering were the shortest in day length treatment of 10 hr per day with blue plus red light among the treatments. Blooming period was also the longest in red treatment regardless of day length and mixture light treatment, and thus above 20 days prolonged than that in control. Otherwise, number of unfolded leaves or net photosynthetic rate was not significantly affected by the different light qualities and day lengths.
9-12%Cr강의 첨가원소 및 열처리에 따른 미세조직거동과 경도변화
주성욱,유정훈,신기삼,허성강,이재현,석진익,김병훈,김정태 국립7개대학공동논문집간행위원회 2004 공업기술연구 Vol.4 No.-
9-12%Cr steel are getting increasing attention for expanded application as high temperature materials applicable for gas turbine compressors, steam turbine rotors, blade and casing. For efficient and extensive application of 9-12%Cr steel, the data in addition to the improvement of mechanical properties on the correlation of microstructural evolution and mechanical properties are inevitable and thus the investigation in this study is performed for the determination for the specimens heat-treated at 600, 650 and 700℃ for 1000, 3000 and 5000hrs. The microstructure of as-received specimen was tempered martensite, with a high dislocation density and secondary phases. Upon high temperature heat-treatment, the martensite lath got larger and dislocation density decreased resulting the reduction of the strength. In addition, sharp growth of secondary phases was observed in the specimen heat-treated at 700℃ for 5000hrs. A specimen aged at 600℃ and 650℃ Laves phase was observed. The hardness showed close relationship with the secondary phase particle and dislocation density.
몇가지 작물중 침투성 살충제 Carbofuran의 잔류량 분석
이재구,최신종,경기성,안기창,권정욱 충북대학교 농업과학기술연구소 1999 農業科學硏究 Vol.16 No.-
In order to ascertain the safety of the systemic insecticide carbofuran - treated crops. garlic, peanut and potato were collected randomly from markets near the major producing farms and analyzed for the residues of carbofuran and its main metabolite, 3-hydroxycarbofuran. The in vitro metabolism of carbofuran in phosphate buffer extracts of the crops was investigated. The results obtained were as follows. 1.The recoveries of carbofuran and 3- hydroxycarbofuran from the spiked samples were 92~ 100% in all samples. The detection limit and minimum amount of carbofuran detected were 0.02ppm and 0.1ng, and those of 3-hydroxycarbofuran 0.06ppm and 0.3ng, respectively. 2.Two mature garlic samples out of 20 contained 0.13 and 0.07ppm of carbofuran, respectively, showing a detection frequancy of 10%. The residue level was less than the maximum residue limit(0.5ppm) set by the health authorities in Korea. Only one mature garlic sample out of 20 contained 0.13ppm of 3-hydroxycarbofuran. 3.The residues of carbofuran and 3-hydroxycarbofuran in the immature garlic, peanut and potato samples were less than the detection limits. 4.The application of carbofuran to the fields of garlic, peanut and potato would be safe, considering that the estimated maximum acceptable daily intake of carbofuran from garlic was 0.0007mg which is 0.13% of the maximum acceptable daily intake(0.55mg) . 5.Carbofuran was hydrolyzed in vitro mainly to carbofuran phenol(m/z 164) in phosphate buffer extracts of the three crops in contrast to the major oxidative metabolism in situ. The amount of the metabolite increased with the incubation time.
요 검사용 스트립의 분광학적 분석을 위한 Computer Simulation
김성철,진병문,김재형,김정배,조진욱,전계록,이승진,김건우 동의대학교 기초과학연구소 1999 基礎科學硏究論文集 Vol.9 No.1
The spectroscopic properties of 9 pads in a urine strip were studied to develop a urine analysis system. From the present work, we determined the wavelength range which could accurately distinguish the degrees of 9 test items. A computer simulation was performed to distinguish the primary color reaction in the urine strips by using the reflectance of the urine strips, the iuminous intensity of light-emitting diodes, and the spectral sensitivity of photodiodes. The simulation results agree well with the experimental results obtained by using a UV-Visible spectrophotometer.
( Kee Wook Jung ),( Dong Hoon Yang ),( In Ja Yoon ),( So Young Seo ),( Hyun Sook Koo ),( Hyo Jeong Lee ),( Ho Su Lee ),( Ji Beom Kim ),( Jong Wook Kim ),( Soo Kyung Park ),( Sang Hyoung Park ),( Kyung 대한소화기기능성질환·운동학회(구 대한소화관운동학회) 2013 Journal of Neurogastroenterology and Motility (JNM Vol.19 No.3
Background/Aims Biofeedback therapy (BFT) can be unsuccessful in constipated patients, even those with pelvic floor dysfunction. Electrical stimulation therapy (EST) has been introduced as a novel therapeutic modality in patients with chronic constipation, especially those who have rectal hyposensitivity. We evaluated the efficacy of EST based on five years` clinical experience. Methods From January 2002 to February 2007, 159 patients underwent EST. After exclusion of 12 drop-outs, 147 (M:F = 61:86, 49 ± 17 years) finished all treatment sessions. Among them, 88 (M:F = 29:59, 49 ± 17 years) were refractory to BFT without rectal hyposensitivity (RH), and 59 (M:F = 32:27, 54 ± 17 years) were those with RH. Results The overall response to EST was 59.2% (87/147) by per-protocol analysis. In the EST-responsive group, overall satisfaction im - proved significantly (from 7.3 ± 3.0 to 4.3 ± 2.5, P< 0.05). Subgroup analysis showed that the response rate was 64.8% (57/88) in patients refractory to BFT without RH, and 50.8 % (30/59) in those with RH. Conclusions EST may have additional therapeutic efficacy in patients who are refractory to BFT. EST may also be effective in patients with RH, including restoration of rectal sensation. Therefore, EST could be considered as an alternative choice in patients refractory to BFT and with or without RH. (J Neurogastroenterol Motil 2013; 19:366-373)
삼채(Allium hookeri) 잎 연중생산을 위한 식물공장 환경제어 효과
허정욱 ( Jeong-wook Heo ),백정현 ( Jeong-hyun Baek ),이성현 ( Sung-hyen Lee ),김민정 ( Min-jeong Kim ),심창기 ( Chang-kee Shim ) 한국환경농학회 2023 한국환경농학회지 Vol.42 No.4
The demand for the fresh leaf of hooker chive, which is mainly used as functional roots and contains dietary sulfur or saponin, is increasing, but the leaves are only harvested 3-4 times per year under conventional field conditions. A plant factory system with different light qualities or intensities was applied for year-round production of the fresh leaves. Hooker chive (Allium hookeri) roots were hydroponically cultured under the plant factory with a mixture of blue plus red LEDs (Light- Emitting Diodes) and fluorescent lights for 50 weeks. Maximum leaf growth was attained with the 1.5 dS/m EC in the culture medium under the plant factory. The average leaf and shoot numbers of hooker chive grown hydroponically under a mixture of 200 μmol/m<sup>2</sup>/s LEDs increased by 147% and 140%, respectively compared to those under 100 μmol/m<sup>2</sup>/s LEDs at the 10th harvest. The leaf length of hooker chive grown under the LEDs treatment with the lowest light intensity significantly increased by 27% compared with the natural light treatment at the 10th harvest. However, there was no significant difference in leaf pigmentation between natural and 200 μmol/m<sup>2</sup>/s LEDs treatments. Plant factory with the mixture LEDs of blue and red lights can be applied for year-round production of hooker chive fresh leaves to ensure a stable supply of leafy vegetable throughout the year.
( Eun Jeong Gong ),( Ji Yong Ahn ),( Hwoon-yong Jung ),( Hyungchul Park ),( Young Bo Ko ),( Hee Kyong Na ),( Kee Wook Jung ),( Do Hoon Kim ),( Jeong Hoon Lee ),( Kee Don Choi ),( Ho June Song ),( Gin 대한간학회 2016 Gut and Liver Vol.10 No.5
Background/Aims: We investigated the effectiveness of Helicobacter pylori eradication therapy for gastric mucosaassociated lymphoid tissue (MALT) lymphoma regardless of the H. pylori infection status or disease stage. Methods: From November 1995 to September 2014, 345 subjects who were diagnosed with gastric MALT lymphoma and had received eradication therapy as their first-line treatment were eligible for inclusion in this study. A retrospective review was performed using the medical records. Results: Of the 345 patients, H. pylori infection was detected in 317 patients (91.9%). The complete remission (CR) rate after eradication therapy was 82.3%, which was higher in H. pylori -positive patients than in H. pylori-negative patients (84.5% vs 57.1%, p=0.001). CR rates after eradication did not present significant differences between stages, and the CR rate was 83.3% for stage IE1 and 74.4% for stage IE2 or above (p=0.167). The overall CR rate was 87.2% after additional treatment, and neither H. pylori infection status nor stage showed differences according to the treatment response. Conclusions: Eradication therapy led to CR in 57.1% of H. pylori-negative patients and in 74.4% of patients with stage IE2 or above. Eradication therapy is worthwhile as an initial treatment for gastric MALT lymphoma regardless of the H. pylori infection status and stage. (Gut Liver 2016;10:706-713)