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You-Kyoung Lee,Sang-hyeok Im,Nak-Jung Choi,Bo Yoon Seo 한국응용곤충학회 2023 한국응용곤충학회 학술대회논문집 Vol.2023 No.10
Scotinophara lurida is one of major sap-sucking pests in an organic rice farming paddy fields in Korea. Several Poaceae grasses (e.g, rice, barley etc) have been known as a host plant. To find out a true host plant of S. lurida, the developmental characteristics such as weight gain and developmental duration were checked on total eight grasses species including rice and corn. In the results, weight of the fifth nymphal stage was the highest value in the barnyard millet and rice plant. In addition, nymphal duration was the shortest value in the barnyard millet and rice plant. But, in corn and common millet plant, S. lurida nymphs could not complete the development to the adult stage. These results suggest that six Poaceae grasses including rice and barnyard millet out of eight test grasses are close related to true host plants of S. lurida.
You-Kyoung Lee,Sang-hyeok Im,Nak-Jung Choi,Bo Yoon Seo 한국응용곤충학회 2023 한국응용곤충학회 학술대회논문집 Vol.2023 No.10
Because Scotinophara lurida has the habit of living under the rice plant, an introduction of a method for efficient control when spraying eco-friendly organic materials is needed. In this study, we investigated the density of S. lurida in drained- and irrigated-paddy field after spraying an organic material containing garlic bulb extracts, which has high insecticidal activity in S. lurida in direct spraying test in glass tube. As a result, an irrigated rice paddy showed a control effect of 66.4% after 3 days of spraying and 86.2% after 7 days, while a drained rice paddy showed a control effect of 33.9% after spraying and 61.9% after 7 days. These results suggest that effective control can be achieved in irrigated rice fields if organic farming materials are evenly sprayed and reach to the body of S. lurida. It is remained to study how irrigated water do contribute to increase the insecticidal effect in the future.
Sphingosine 1-Phosphate and Sphingosine Kinase Activity during Chicken Embryonic Development
Chang-Hwan Choi,정지선,Bo-im Yoo,You-Xun Jin,문동철,유환수,오세관,홍선표,이용문 대한약학회 2007 Archives of Pharmacal Research Vol.30 No.4
The chicken embryo has been well used in studies of the developmental process, and during development sphingosine and sphingosine 1-phosphate (So1P) are considered critical mediators of cell death and survival. In this study, we compared the sphingolipid contents of chicken embryos during the early embryonic development period from day 3 to day 6. HPLC analyses of sphingosine and So1P in chicken embryos revealed that sphingosine levels were greatly reduced on day 4 whereas So1P levels were not significantly changed. Sphingosine kinase (Sphk) activities, which require sphingosine as substrate to produce So1P, were also greatly reduced on day 4. Collectively, we found sphingosine levels and Sphk activities, but not So1P levels are changed in early stage of chicken embryos development.
( Byoung Hyuck Kim ),( Eui Kyu Chie ),( Kyu Bo Kim ),( Jin Young Jang ),( Sun Whe Kim ),( Sae Won Han ),( Do Youn Oh ),( Seock Ah Im ),( Tae You Kim ),( Yung Jue Bang ),( Sung W Ha ) 대한내과학회 2014 대한내과학회 추계학술발표논문집 Vol.2014 No.1
Background: To date, there is a paucity of information regarding optimal radiation dose after microscopic positive (R1) resection in patients with extrahepatic bile duct cancer. This study was conducted to evaluate the impact of radiation dose escalation for R1 resection margin (RM). Methods: A retrospective review was performed on 251 patients who underwent curative resection followed by adjuvant chemoradiotherapy between 1995 and 2009. Eighty-six patients had R1 RM which included invasive carcinoma (n=63) and carcinoma in situ/high-grade dysplasia (n=23). Among them, 54 patients received radiation dose < 54 Gy (range, 40-50.4 Gy) and 32 patients received = 54 Gy (range, 54-56 Gy). Concomitant fi uoropyrimidine-based chemotherapy was administered. Acute and late gastrointestinal (GI) toxicity were evaluated using Radiation Therapy Oncology Group criteria. The median follow-up duration was 27 months for all patients and 92 months for survivors. Results: Radiation dose = 54 Gy was associated with improved locoregional control (LRC) (5yr rate, 73.8% vs. 47.1%, p = 0.038), but not disease-free survival (5yr rate, 43.4% vs. 32.6%, p = 0.427) and overall survival (5yr rate, 40.6% vs. 29.6%, p = 0.393). In multivariate analysis for LRC, R1 with invasive carcinoma (HR 3.31, 95% CI 1.11-9.85, p = 0.032) and radiation dose < 54 Gy (HR 3.09, 95% CI 1.14-8.39, p=0.027) were independent adverse prognostic factors. Between the two dose groups, there was no signifi cant difference in acute GI toxicity =grade 2 and in late GI toxicity =grade 3. Conclusions: The current study demonstrated that radiation dose = 54 Gy was associated with improved LRC in patients with R1 RM and also well tolerated. Therefore, dose escalation could be considered for R1 RM. Prospective study is needed to verify these results.
Sphingosine 1-Phosphate and Sphingosine Kinase Activity during Chicken Embryonic Development
Choi, Chang-Hwan,Jeong, Ji-Seon,Yoo, Bo-Im,Jin, You-Xun,Moon, Dong-Cheul,Yoo, Hwan-Soo,Oh, Seik-Wan,Hong, Seon-Pyo,Lee, Yong-Moon 대한약학회 2007 Archives of Pharmacal Research Vol.30 No.4
The chicken embryo has been weil used in studies of the developmental process, and during development sphingosine and sphingosine 1-phosphate (So1P) are considered critical mediators of cell death and survival. In this study, we compared the sphingolipid contents of chicken embryos during the early embryonic development period from day 3 to day 6. HPLC analyses of sphingosine and So1P in chicken embryos revealed that sphingosine levels were greatly reduced on day 4 whereas So1P levels were not significantly changed. Sphingosine kinase(Sphk) activities, which require sphingosine as substrate to produce So1P, were also greatly reduced on day 4. Collectively, we found sphingosine levels and Sphk activities, but not So1P levels are changed in early stage of chicken embryos development.