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Response of Frankliniella occidentalis to Three HIPVs in Y-tube Olfactometer
Byeong Chan Ko,Bikash Bhusal,Un Taek Lim 한국응용곤충학회 2018 한국응용곤충학회 학술대회논문집 Vol.2018 No.04
The western flower thrips, Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae), is an important pest of horticultural and agricultural crops worldwide. The repeated use of chemical insecticides resulted in the development of insecticide resistance. We evaluated response of F. occidentalis to three synthetic herbivore-induced plant volatiles (HIPVs), methyl salicylate, methyl anthranilate, and nonanal known as attractants of thrips’ natural enemy, in Y-tube olfactometer. Mated fed adult females of F. occidentalis showed lowest response rate to methyl salicylate than methyl anthranilate, and nonanal. These results show that methyl salicylate may act as repellent to F. occidentalis, and can be used as a component of push-pull strategies for the management of F. occidentalis.
Byeong Sung Yoon,Chengwu Jin,Park Sang Un,Dong Ha Cho 韓國作物學會 2005 Korean journal of crop science Vol.50 No.1
To identify salt-tolerance characteristics of corn seedling was treated in solution of 0, 50 and 100 mM NaCl of hydroponic cultivation. In photosynthesis of corn seedling, there was no large difference between 50mM and 0 mM NaCl solution, however, in 100 mM NaCl solution, the tolerance gradually decreased to 76~%,~;49~%,~;and~;31~% after one day, four days, and seven days, respectively, in comparison to 0 mM NaCl solution. Osmotic potential of corn in seedling period was significantly decreased with increasing saline level, however, free proline content in the plant on the ground was significantly increased with increasing saline level and with the lapse of time. In terms of correlation among major characteristics, there was a highly significant positive difference between osmotic pressure potential and photosynthesis, However, highly negative correlation was found between osmotic pressure potential and free proline content. In addition, it was expected that young seedling of corn with saline tolerance may be utilized in the transplantation in salt-accumulated land. Based on above-shown result, in terms of saline tolerance of Chalok-2 variety, growth suppression was serious with 100mM NaCl solution. However, growth was expected that seedling growth would be favorable under 50 mM NaCl solution.
CASE REPORT : Two Cases of Cecal Schwannoma Which Were Removed by Endoscopic Mucosal Resection
( Byeong Kwang Choi ),( Rok Seon Choung ),( Sang Yup Lee ),( Tae Un Yang ),( Sun Hwa Kim ),( In Kyung Yoo ),( Sang Kyu Lee ),( Seung Young Kim ),( Sung Woo Jung ),( Ja Seol Koo ),( Jong Jin Hyun ),( H 대한장연구학회 2013 Intestinal Research Vol.11 No.1
Schwannoma in colorectum is a rare subepithelial polyp of mesenchymal origin, which is derived from the neural sheath, and most of reported cases were removed surgically. We, herein, describe two cases of schwannoma of the cecum, which were removed by endoscopic mucosal resection. A 34-year-old man and a 62-year-old man presented with abdominal discomfort and bowel habit change. The patients were diagnosed with a subepithelial tumor in the cecum on colonoscopy and underwent endoscopic mucosal resection under a tentative impression as neuroendocrine tumor, such as carcinoid tumor. Histopathology and immunohistochemistry confirmed the colonic lesion to be a benign schwannoma. (Intest Res 2013;11:56-59)
Mapping of the Reduced Culm Number Trait in Rice (Oryza sativa L.) rcn10(t) Mutant
Un-Sang Yeo,Jong-Hee Lee,Choon-Song Kim,Meong-Gi Jeon,Tae-Yong Oh,Chang-Deok Han,Mun-Sik Shin,Byeong-Geun Oh 한국육종학회 2008 한국육종학회지 Vol.40 No.3
In rice, tillering is an important trait determining yield. To study tillering at the agricultural and molecular aspects, we have examined a spontaneous rice mutant that showed reduction in the number of culms. The mutant was derived from a F6 line of the cross of Junambyeo*4 / IR72. It could produce, on average, 4 tillers per hill in the paddy field while wild-type plants usually have 15. Except the reduced culm numbers, they also show pale green phenotypes. The phenotypes of this mutant were co-segregated as the monogenic Mendelian ratio (χ2 = 0.002, p = 0.969). In order to locate a gene responsible for the rcn phenotype, the mutant with the japonica genetic background was crossed with Milyang21 of the indica background. Bulked segregant analysis was used for rapid determination of chromosomal location. Three SSR markers (RM551, RM8213, and RM16467) on chromosome 4 were genetically associated with the mutant phenotype. Each of the 217 F2 plants was genotyped with simple sequence length polymorphisms. The data showed that RM16572 on chromosome 4 was the closest marker that showed perfect co-segregation among the F2 population. We suggest the new rcn gene studied here name as rcn10t because there was no report which exhibit a rcn phenotype with a pleiotropic effect of pale green (chlorophyll deficiency), and mapped at same position on chromosome 4.
A Medium Maturity, and High Quality Rice Variety, "Hwabongbyeo"
Byeong Geon Oh,Sang Jong Lim,Ki Hwan Yi,No Bong Park,Un Sang Yeo,Sae Jun Yang,Ho Yeong Kim,Heung Gu Hwang,Do Yeon Kwak,Jong Rae Kang,Jeom Sik Lee,Soon Chul Kim,Moo Sang Lim 한국육종학회 2003 한국육종학회지 Vol.35 No.1
This japonica cultivar was developed from a cross between two F1 hybrids of YR13168 (Milyang 95/Iri390) and YR13198 (Milyang101/Iri390) using anther culture. It has about 104 days of growing duration from seeding to heading and relatively short
Near time-optimal feedback instantaneous impact point (IIP) guidance law for rocket
Jo, Byeong-Un,Ahn, Jaemyung ELSEVIER PARIS 2018 AEROSPACE SCIENCE AND TECHNOLOGY Vol. No.
<P><B>Abstract</B></P> <P>This paper proposes a feedback guidance law to move the instantaneous impact point (IIP) of a rocket to a desired location. Analytic expressions relating the time derivatives of an IIP with the external acceleration of the rocket are introduced. A near time-optimal feedback-form guidance law to determine the direction of the acceleration for guiding the IIP is developed using the derivative expressions. The effectiveness of the proposed guidance law, in comparison with the results of open-loop trajectory optimization, was demonstrated through IIP pointing case studies.</P>
Mode Coupling within Inner Cladding Fibers
Lee, Byeong-Ha,Eom, Tae-Jung,Kim, Myoung-Jin,Paek, Un-Chul,Park, Tae-Sang 한국광학회 2003 Current Optics and Photonics Vol.7 No.2
We report the formation of inner cladding modes in the optical fiber having an inner cladding structure. The inner cladding layer located between the core- and the cladding- layers of a conventional fiber might have, so called, inner cladding mode(s). The brief history of the inner cladding fiber and the spectral properties of the inner cladding mode are presented. By utilizing fiber gratings, the spectral properties of the inner cladding mode formed in Dispersion Compensating Fiber (DCF) are discussed. It was observed that one resonant peak of a long-period fiber grating was not sensitive to the variation on the cladding surface. With a fiber Bragg grating, a small group of unusual resonant Peaks was observed between the main Bragg Peak and the series of usual Peaks resulted from the mode coupling to counter-propagating cladding modes. Within the DCF by using fiber gratings, it is noted, at least one mode can be coupled to the inner cladding mode and a few outer cladding modes are severely affected by the inner cladding of the fiber.