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- 저자 : ( Gwang-yeol Yoo ) (검색결과 47 건)
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박효열,진광수,유병길,주정진,김중환 동의대학교 기초과학연구소 1994 基礎科學硏究論文集 Vol.4 No.1
Cd_1-xMn_xTe single crystals were grown by vertical Bridgman method and Mn mole fraction x was determined by the X-ray diffraction. Band gap and optical transition energies E₁, E₁+ △₁, E₂, △₁as Mn mole fraction x were obtained by measuring optical absorption and reflection at UV-visible region respectively. The change of the valence band spin-orbit splitting △₁at △ point of the Brillouin zone was discussed.
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Yoo, Gwang-Yeol,Lee, Jeong-Yeol The Korean Society of Fisheries and Aquatic Scienc 2016 Fisheries and Aquatic Sciences Vol.19 No.5
The effects of daily feeding frequency (Exp I), water temperature (Exp II), and stocking density (Exp III) on the growth of river puffer, Takifugu obscurus, juvenile fish of 10 and 40 g in body weight were examined to develop effective techniques to produce river puffer in a non-exchange water system. In Exp I, fish were fed commercial floating feed with 45 % protein one to five times per day to apparent satiation each by hand daily for 8 weeks at $25^{\circ}C$. In both the 10- and 40-g size groups, the final body weight, daily feed consumption, and weight gain of fish fed one meal per day were significantly lower than those of fish fed five meals per day (P < 0.05). However, there were no significant differences in the final body weight, daily feed consumption, and weight gain among fish fed two, three, and five meals per day. Feed efficiency showed decreasing tendency with increasing size of fish. In Exp II, fish of 10 and 40 g in initial body weight were reared with the commercial feed at $15-30^{\circ}C$ for 8 weeks. The weight gain of fish increased with raising water temperature up to $25^{\circ}C$ and decreased drastically at $30^{\circ}C$ for both sizes. The Q10 of specific growth rate was decreased with raising water temperature from 5.04 (temperature interval, $15-20^{\circ}C$) to 0.66 ($25-30^{\circ}C$) for the 10-g fish and from 4.98 to 0.31 for the 40-g fish. In Exp III, the effect of stocking density on growth was examined with fish of 10 and 40 g in initial body weight. The final body weight for initial stocking densities of 4, 8, and $12kg/m^3$ was significantly higher than that of $20kg/m^3$ for the 10-g fish, and the final stocking density reached 10.1, 19.2, 28.7, and $39.9kg/m^3$, respectively. For the 40-g fish, the final body weight for initial stocking densities of 3 and $6kg/m^3$ was significantly higher than that of 9 and $15kg/m^3$ and the final stocking density reached 7.38, 13.5, 17.1, and $27.5kg/m^3$, respectively (P < 0.05). In both groups, weight gain tended to decrease with increasing stocking density; however, survival showed no significant difference.
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( Gwang-yeol Yoo ),( Jeong-yeol Lee ) 한국수산과학회(구 한국수산학회) 2016 Fisheries and Aquatic Sciences Vol.19 No.3
The effects of daily feeding frequency (Exp I), water temperature (Exp II), and stocking density (Exp III) on the growth of river puffer, Takifugu obscurus, juvenile fish of 10 and 40 g in body weight were examined to develop effective techniques to produce river puffer in a non-exchange water system. In Exp I, fish were fed commercial floating feed with 45 % protein one to five times per day to apparent satiation each by hand daily for 8 weeks at 25℃. In both the 10- and 40-g size groups, the final body weight, daily feed consumption, and weight gain of fish fed one meal per day were significantly lower than those of fish fed five meals per day (P < 0.05). However, there were no significant differences in the final body weight, daily feed consumption, and weight gain among fish fed two, three, and five meals per day. Feed efficiency showed decreasing tendency with increasing size of fish. In Exp II, fish of 10 and 40 g in initial body weight were reared with the commercial feed at 15-30℃ for 8 weeks. The weight gain of fish increased with raising water temperature up to 25℃ and decreased drastically at 30℃ for both sizes. The Q10 of specific growth rate was decreased with raising water temperature from 5.04 (temperature interval, 15-20℃) to 0.66 (25-30℃) for the 10-g fish and from 4.98 to 0.31 for the 40-g fish. In Exp III, the effect of stocking density on growth was examined with fish of 10 and 40 g in initial body weight. The final body weight for initial stocking densities of 4, 8, and 12 kg/m3 was significantly higher than that of 20 kg/m3 for the 10-g fish, and the final stocking density reached 10.1, 19.2, 28.7, and 39.9 kg/m3, respectively. For the 40-g fish, the final body weight for initial stocking densities of 3 and 6 kg/m3 was significantly higher than that of 9 and 15 kg/m3 and the final stocking density reached 7.38, 13.5, 17.1, and 27.5 kg/m3, respectively (P < 0.05). In both groups, weight gain tended to decrease with increasing stocking density; however, survival showed no significant difference.
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단백질원료의 종류에 따른 황복(Takifugu obscurus) 치어의 소화율 및 성장 평가
유광열 ( Gwang Yeol Yoo ),배승철 ( Sung Chul Bai ) 한국수산과학회 2014 한국수산과학회지 Vol.47 No.4
An 8-week feeding trial was conducted to determine the apparent dry matter and protein digestibility of seven differ- ent dietary protein sources by juvenile river puffer Takifugu obscurus. Eight diets containing white fish meal (WFM), brown fish meal (BFM), squid liver powder (SLP), krill meal (KM), leather meal (LM), soybean meal (SM), or fermented soybean meal (FSM) were prepared by mixing a basal diet (BD) with one of the seven test ingredients at a ratio of 7 to 3. Fish averaging 10.8 ± 0.04 g were fed the experimental diets in triplicate groups. The apparent dry matter digestibilities of BFM, WFM, FSM, SLP, LM, SM, and KM were 80, 78, 72, 67, 56, 55, and 54%, respectively, while the corresponding apparent protein digestibilities were 96, 96, 93, 92, 89, 88, and 86. The weight gain of fish fed BFM was significantly greater than that of fish fed SM or LM (P <0.05), while it was not significantly different from that of fish fed the BD, WFM, FSM, BFM, SLP, or KM. These results indicated that WFM, BFM, FSM, and SLP are potentially good protein sources for replacing fish meal in river puffer feed.
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사료 내 지질원 및 필수지방산이 치어기 황복(Takifugu obscurus)의 성장 및 체조성에 미치는 영향
유광열 ( Gwang Yeol Yoo ),배승철 ( Sung Chul Bai ) 한국수산과학회 2014 한국수산과학회지 Vol.47 No.4
We conducted an 8-week feeding trial to evaluate dietary lipid sources on the growth performance and body compo-sition of juvenile river puffer fish Takifugu obscurus. Nine experimental diets were formulated with fishmeal as the major protein ingredients, providing 50% crude protein. The experimental diets contained either beef fallow (BF), soybean oil (SO), rapeseed oil (RO), or linseed oil (LO). Each of these diets was then supplemented or not with 0.5% n-3 HUFA (BFH, SOH, ROH, and LOH), resulting in a total of eight experimental diets. The control diet contained fish oil (FO) as the lipid source. Fish averaging 10.3±0.03 g were fed the experimental diets in randomly selected triplicate groups for 8 weeks. Weight gain and feeding efficiency of fish fed the FO and SOH diets were significantly higher than those of fish fed BF or RO (P <0.05), but these diets did not differ significantly from the other diets. The protein efficiency ratio of fish fed the SOH diet was significantly higher than that of fish fed the BF, SO, or RO diets (P <0.05), but these were not significantly different from the other diets. The specific growth rate of fish fed the FO and SOH diets was significantly higher than that of fish fed the BF diet (P <0.05). Whole body DHA and n-3 HUFA contents of fish fed the FO diet were significantly higher than those of fish fed the SO, RO, or LO diets (P <0.05), but were not significantly different from the other diets. These results indicate that soybean oil and linseed oil could replace up to 100% of fish oil in the diet containing 60% fishmeal for river puffer fish.
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Won Seok Yang,Hyun Woo Gil,Gwang Yeol Yoo,In-Seok Park 한국발생생물학회 2015 발생과 생식 Vol.19 No.3
For the 2 years of farming, at the indoor circulating aquaculture system, four kinds of skeletal deformities were found among 60 Far Eastern catfish, Silurus asotus. Deformities saw jawbone’s luxation, abnormality of upper lip and malocclusion. Spinal deformity was most fatal deformities with low weight and small length. Jawbone’s luxation had 1 maxilla and 2 mandibles. Abnormality of upper lip had just lip was back over. Malocclusion’s left maxilla and right maxilla were not balanced. This experiment was any deformities in this species through the deformity can grasp how it affects.
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In-Seok Park,Hyun Woo Gil,Ji Su Oh,Gwang Yeol Yoo 한국발생생물학회 2015 발생과 생식 Vol.19 No.2
We assessed the effects of various dietary conditions on the growth, phenotypic traits, and morphometric dimensions of rock bream, Oplegnathus fasciatus and on the morphometric dimensions of sectioned olive flounder, Paralichthys olivaceus. Rock bream in the fed group increased in body weight, standard length, and condition factor, but these parameters decreased significantly for fish in the starved group (P < 0.05). The head connection dimensions of fish in the fed group decreased, while for starved fish there was increase in external morphometric dimensions (P < 0.05). In both species, sectioned morphometric analysis revealed that fish in the fed group had a larger body circumference and cross-cut sectional area, and greater cross-cut section height, relative to the starved group (P < 0.05).
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조광열(Gwang Yeol Joh),윤재일(Jai Il Youn),이유신(Yoo Shin Lee) 대한피부과학회 1987 대한피부과학회지 Vol.25 No.3
We report a case of solar urticaria being activated by both UVA and visible radiation and positive in passive transfer test by visible light, which was treated with sunlight and UVA radiation. A short course of treatment with sunlight produced no benificial effect. UVA phototherpy produced a rnarked increase in the minirnal urtication dose by UVA but there was no increased tolerance to sun exposure.
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조광열(Gwang Yeol Joh),윤재일(Jai Il Youn),이유신(Yoo Shin Lee) 대한피부과학회 1985 대한피부과학회지 Vol.23 No.3
Solar urticaria is an uncommon disorder characterized by rapid development of urticarial reaction in areas of skin exposed to nonizing electromagnetic radiation. Herber and Baer classified solar urticaria into eight types on the basis of action spectrum and passive or reverse passive transfer ability. We report two cases of type ]g solar urticaria which were activated by visible light and negative in both passive and reverse passive transfer test.
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