• Title/Summary/Keyword: Choi Chang Hak

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Gui Valley: A High Yielding Potential and Good Processing Potato Cultivar

  • Lim, Hak-Tae;Dhital, Shambhu Prasad;Khu, Don-Man;Li, Kui-Hwa;Choi, Seon-Phil;Kang, Chang-Won;Kim, Tae-Joo;Mo, Hwang-Sung;Hwang, Won-Nam;Lee, Woo-Jong
    • Korean Journal of Plant Resources
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    • v.22 no.6
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    • pp.483-488
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    • 2009
  • The main objective of this breeding program is to develop high yielding, disease resistance and good processing potato cultivar. 'Gui Valley' is a clonal selection resulting from a cross between 'ND2471-8' and 'Cona'. It has medium plant height and light green foliage. 'Gui Valley' has medium flowering habit and light pink flowers. 'Gui Valley' is a medium maturing potato cultivar and tubers are smooth, yellow skin, light yellow flesh, long-oval tuber shape, distinct red eyes with medium depth and medium dormancy. It has high level of tuber uniformity and good keeping quality. 'Gui Valley' demonstrates resistance to potato virus Y (PVY), soft rot, but moderately susceptible to late blight and common scab. It is also resistant to most of the internal and external physiological disorders particularly dehiscence, hollow heart and internal brown spot. The specific gravity of 'Gui Valley' is significantly higher (1.097) than that of 'Shepody' (1.078). 'Gui Valley' has suitable for processing mainly French fries and chips. This cultivar has high level of tuber uniformity and capable of yielding 37.6 $t{\cdot}ha^{-1}$, which is 18.2% higher than the control potato cultivar 'Shepody' under optimum agronomical practices.

Influence of Welding Parameters on Macrostructure and Mechanical Properties of Friction-Stir-Spot-Welded 5454-O Aluminum Alloy Sheets (마찰교반점접합한 5454-O 알루미늄합금 판재의 접합부 거시조직 및 기계적 특성에 미치는 접합인자의 영향)

  • Choi, Won-Ho;Kwon, Yong-Jai;Yoon, Sung-Ook;Kang, Myoung-Soo;Lim, Chang-Yong;Seo, Jong-Dock;Hong, Sung-Tae;Park, Dong-Hwan;Lee, Kwang-Hak
    • Journal of Welding and Joining
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    • v.29 no.6
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    • pp.56-64
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    • 2011
  • Friction stir spot welding between 5454 aluminum alloy sheets with the different thicknesses of 1.4 and 1.0 mm was performed. In the welding process, the tool for welding was rotated ranging from 500 to 2500, and plunged to the depth of 1.8 mm under a constant tool plunge speed of 100 mm/min. And then, the rotating tool was maintained at the plunge depth during the dwell time ranging from 0 to 7 sec. The pull-out speed of the rotating tool was 100 mm/min. The increase of tool rotation speed resulted in the change of the macrostructure of friction-stir-spot-welded zone, especially the geometry of welding interface. The results of the tensile shear test showed that the total displacement and toughness of the welds were increased with the increase of the tool rotation speed, although the maximum tensile shear load was decreased. However, the change in the dwell time at the plunge depth of the tool did not produce the remarkable variation in the macrostructure and mechanical properties of the welds. In all cases, the average hardness in friction-stir-spot-welded zone was higher than that of the base metal zone. By the friction stir spot welding technique, the welds with the excellent mechanical properties than the mechanically-clinched joints could be obtained.

Effects of Nelumbo Folium and Hayopokchun-san on Diabetes Mellitus in Streptozotocin Treated Rats (하엽(荷葉) 및 하엽옥천산(荷葉玉泉散)이 streptozotocin으로 유발된 당뇨(糖尿)에 미치는 영향)

  • Yang, Woong-Mo;Chang, Mun-Seog;Park, Wan-Su;Lee, Byong-Hee;Kim, Won-Nam;Kim, San-Woong;Choi, Dong-Gi;Lee, Hak-Chul;Park, Seong-Kyu
    • Journal of Physiology & Pathology in Korean Medicine
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    • v.20 no.6
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    • pp.1497-1501
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    • 2006
  • The therapeutic anti-diabetic effect of Nelumbo Folium and a poly herbal formula (NOC) was evaluated in the streptozotocin (STZ 60 mg/kg, I.p.) induced diabetic rats. For this study, test articles were orally administrated once a day from 7 d after STZ-injection for 3 weeks. The fasting blood glucose, body weight, pancreas weight changes, oral glucose tolerance test, hemoglobin Alc (Hb A1c) level changes and the histopathological changes were observed. WNL-treated rat had lower fasting blood glucose levels compared to control group and NOC-treated rat had significantly lower fasting blood glucose levels, compared to control group (p < 0.05). After 21 days of extract treatment, body weight in control was reduced (p < 0.001). WNL and NOC groups were also reduced compared to control group but insignificantly. Pancreas weight of control group was reduced (p < 0.001), but the weight of NOC group were increased (P< 0.05). During the 2 h oral glucose tolerance test (OGTT), WNL group were improved compared to control group (P < 0.05). NOC group were improved compared to control group but insignificantly. WNL and NOC groups had lower Hb Alc level compared to control group. In addition, atrophy of islet and decrease of insulin-producing cells were detected in STZ induced diabetes rats. However, these diabetic changes were decreased in WNL and NOC groups. These results suggest that N. Folium and NOC have favorable effects to inhibit the changes on the fasting blood glucose levels, pancreas weight, glucose tolerance, hemoglobin Alc and the histopathological changes of pancreas in STZ-induced diabetes.

Effects of Germinated Whole Soy flour on the Properties of Dough and Noodle (발아콩분말 첨가가 반죽 및 면류 특성에 미치는 영향)

  • Chung Hai-Jung;Choi, Min-Hee;Chang Hak-Gil;Kim Joo-Sook;Kim Woo-Jung
    • Korean journal of food and cookery science
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    • v.21 no.6 s.90
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    • pp.919-926
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    • 2005
  • The effects of the addition of germinated whole soy flour on dough and noodle characteristics were investigated in this study. The soybeans were germinated for 12 hours at $20^{\circ}C$ and ground to 60 mesh. With increasing soybean flour addition up to $16\%$, the RVA viscograph and mixograph properties were significantly decreased both with and without the addition of $3\%$ salt(p<0.05). The width and length extensibility were increased with increasing whole soy flour addition up to $8\%$ after which they decreased. The addition of the whole soy flour turned the color of the wet and cooked noodle a little darkish and greenish yellow. The hardness and gumminess of wet noodle increased with increasing whole soy flour amount, while those of cooked noodle gradually decreased. Sensory evaluation showed that addition of tile whole soy flour significantly increased the savory flavor and yellowish color of cooked noodle.

Analysis of Genetic Relationship Among Collected Cymbidium goeringii Based on RAPD (RAPD를 이용한 춘란 수집종 20 품종의 유연관계 분석)

  • Kim, Tae Bok;Lee, Jin Jae;Song, Young Ju;Choi, Chang Hak;Cheong, Dong Chun;Yu, Young Jin
    • FLOWER RESEARCH JOURNAL
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    • v.19 no.4
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    • pp.225-230
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    • 2011
  • This research was performed for making data-base of cross-breeding between Cymbidium goeringii cultivars. Morphological characteristics were investigated and then genetic relationship was analyzed. Collected 20 Cymbidium goeringii cultivars were clustered into 2 groups. Seven cultivars were clustered into group I, and thirteen cultivars were clustered into group II. Group I doesn't have leaf pattern. Group have leaf pattern. The genetic relationship among collected 20 Cymbidium goeringii cultivars was anaylzed using RAPD with ten 10-mers random primer. Eighty-nine bands were generated by RAPD. Among the rest, three bands were monomorphic and eight-six bands were polymorphic. Overall similarity degree ranged from 0.521 to 0.862. The result of RAPD analysis was clustered into 2 groups, too. Sixteen cultivars were clustered into GroupX, and four cultivars were clustered into GroupY. Result of classification with morphological characteristics and RAPD showed different pattern, but 4 cultivars of GroupY by RAPD analysis were included in groupby morphological characteristics. Crossbreeding combination among low related coltivars in RAPD analysis may get more efficient result.

A Case Report of a Patient with Guillain-Barre Syndrome Who Complained of Quadriplegia (사지마비를 주소로 하는 길랑바레 증후군 환자에 대한 증례보고 1례)

  • Heo, Gi-yoon;Lee, Chan;Cho, Im-hak;Kang, Hee-kyung;Kim, Min-hwa;Kim, So-yeon;Park, Seong-ha;Yun, Young-ju;Lee, In;Choi, Jun-yong;Han, Chang-woo;Hong, Jin-woo;Kwon, Jung-nam
    • The Journal of Internal Korean Medicine
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    • v.42 no.5
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    • pp.1009-1019
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    • 2021
  • Purpose: The aim of this study was to report the improvement of Guillain-Barre syndrome after long-term combination treatment with Korean medicine. Methods: A patient was diagnosed with Guillain-Barre syndrome and treated with herbal medicine, acupuncture, pharmacopuncture, moxibustion, and exercise, including quadruped walking after three hospital admissions. To evaluate muscle strength and weakness, we measured manual muscle function, gait pattern, and the speed of quadruped walking. Results: The patient's muscle weakness in the extremities and gait stance were improved. The speed of quadruped walking was increased. Conclusion: We consider that combined treatment with Korean medicine might be effective for the muscle weakness of Guillain-Barre syndrome with a poor prognostic factor. To verify the effectiveness of this treatment, further research is needed.

A Case Report on Korean Medical Treatment of a Patient with Abnormal Liver Function Induced by Rovazet (로바젯정으로 유발된 간수치 상승 환자의 한방 치료 증례 보고)

  • Kang, Hee-kyung;Cho, Im-hak;Lee, Chan;Heo, Gi-yoon;Kim, Min-hwa;Kwon, Jung-nam;Kim, So-yeon;Park, Seong-ha;Yun, Young-ju;Lee, In;Choi, Jun-yong;Hong, Jin-woo;Han, Chang-woo
    • The Journal of Internal Korean Medicine
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    • v.42 no.5
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    • pp.846-852
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    • 2021
  • Objective: This study evaluated a clinical case of a patient with Rovazet-induced abnormal liver function treated with intradermal acupuncture. Method: A 59-year-old woman with abnormal liver function induced by Rovazet ceased taking the drug and instead received intradermal acupuncture treatment. After 15 days, clinical symptoms and laboratory test results were evaluated. Results: Aspartate aminotransferase and alanine aminotransferase levels decreased, and clinical symptoms such as nausea and fatigue improved after treatment with intradermal acupuncture and cessation of the Rovazet. Conclusion: This study meaningfully examined a clinical case of a patient with abnormal liver function induced by a lipid-lowering agent, which is uncommon in Korea. Unfortunately, the lack of clear evidence and the use of only one case are limitations of the study.

Post-2020 Emission Projection and Potential Reduction Analysis in Agricultural Sector (2020년 이후 농업부문 온실가스 배출량 전망과 감축잠재량 분석)

  • Jeong, Hyun Cheol;Lee, Jong Sik;Choi, Eun Jung;Kim, Gun Yeob;Seo, Sang Uk;Jeong, Hak Kyun;Kim, Chang Gil
    • Journal of Climate Change Research
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    • v.6 no.3
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    • pp.233-241
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    • 2015
  • In 2014, the United Nations Framework Convention on Climate Change (UNFCCC) agreed to submit the Intended Nationality Determined Contributions (INDCs) at the conference of parties held in Lima, Peru. Then, the South Korean government submitted the INDCs including GHGs reduction target and reduction potential on July, 2015. The goal of this study is to predict GHGs emission and to analyze reduction potential in agricultural sector of Korea. Activity data to estimate GHGs emission was forecast by Korea Agricultural Simulation Model (KASMO) of Korea Rural Economic Institute and estimate methodology was taken by the IPCC and guideline for MRV (Measurement, Reporting and Verification) of national greenhouse gases statistics of Korea. The predicted GHGs emission of agricultural sectors from 2021 to 2030 tended to decrease due to decline in crop production and its gap was less after 2025. Increasing livestock numbers such as sheep, horses, swine, and ducks did not show signigicant impact the total GHGs emission. On a analysis of the reduction potential, GHGs emission was expected to reduce $253Gg\;CO_{2-eq}$. by 2030 with increase of mid-season water drainage area up to 95% of total rice cultivation area. The GHGs reduction potential with intermittent drainage technology applied to 10% of the tatal paddy field area, mid-drainage and no organic matter would be $92Gg\;CO_{2-eq}$. by 2030.

Traditional Korean Medicine for Non-Small Cell Lung Cancer Patient Undergoing Pembrolizumab Immunotherapy: A Case Report (Pembrolizumab 면역치료를 시행 중인 비소세포성 폐암환자의 한방치료 증례보고)

  • Shim, So-hyun;Seo, Hee-jeong;Seo, Hyung-bum;Cho, Im-hak;Lee, Chan;Kim, So-yeon;Han, Chang-woo;Park, Seong-ha;Yun, Young-ju;Lee, In;Kwon, Jung-nam;Hong, Jin-woo;Choi, Jun-yong
    • The Journal of Internal Korean Medicine
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    • v.40 no.4
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    • pp.709-722
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    • 2019
  • Objective: The purpose of this study was to report the effect of traditional Korean medicine (TKM) in alleviating the side effects of lung cancer patient undergoing immunotherapy. Method: A 43-year-old man, who was diagnosed with non-small cell lung cancer, received pembrolizumab treatments. The patient was treated with acupuncture and herbal medicine (Geoeoyangpye-tang) to control various uncomfortable symptoms. The degree of pain was measured by the numeric rating scale (NRS). The European Organization for Research and Treatment of Cancer Quality of Life Questionnaire, Core 30 (EORTC QLQ-C30) and the EORTC 13-item lung cancer-specific module (EORTC LC-13 questionnaire) were used to assess the change in the quality of life. Results: After the TKM treatment, the flank pain and arthralgia based on the NRS were significantly improved. Various uncomfortable symptoms such as fatigue, dyspnea, insomnia, and loss of appetite were also significantly improved, based on the EORTC QLQ-C30 and EORTC QLQ-LC13. The size of the primary tumor was decreased during treatment. The disease status was stable radiologically after two months from discharge.

Analysis of the Numeric Rating Scale (NRS) Used in Clinical Studies Based on Randomized Controlled Studies (임상연구에서 사용되고 있는 NRS에 대한 분석 : 무작위대조군연구를 중심으로)

  • Lee, Chan;Cho, Im-hak;Heo, Gi-yoon;Kang, Hee-kyung;Kim, Min-hwa;Han, Chang-woo;Kim, So-yeon;Choi, Jun-yong;Park, Seong-ha;Yun, Young-ju;Hong, Jin-woo;Kwon, Jung-nam;Lee, In
    • The Journal of Internal Korean Medicine
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    • v.42 no.4
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    • pp.510-531
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    • 2021
  • Objectives: The purpose of this study was to review the status of numeric rating scale (NRS) usage and suggest the potential for use in multicenter retrospective studies of various diseases. Methods: Articles published from 2011 to 2021 that used the keywords "NRS", "Multi-center", and "RCT" were identified in foreign databases, including EMBASE, PubMed, CENTRAL. The articles were analyzed according to their use of "NRS" by symptoms and by disease group using the major classifications of the Korean Standard Classification of Diseases (KCD-7). Results: Classification by symptom in a total of 288 articles illustrates that the NRS was not only commonly used in pain evaluation but also for non-pain symptoms. In usage with non-pain symptoms, chief complaint of patients was the most common at 79%, and other factors included treatment satisfaction, evaluation of daily life, and sleep quality. In disease classification according to the KCD-7, the NRS was commonly used in connection with musculoskeletal and connective tissue diseases but was also utilized in various other disease groups. Conclusions: This study confirms usage of the NRS in multi-center RCTs, as the NRS was widely used in all types of diseases and symptoms. Considering the result and the advantages of the NRS, it is recommended for use as a daily evaluation tool for the collection of common data in multicenter retrospective studies.