Photoluminescence Properties of Soluble Polypyrrole Doped with Functional Dopants

정관식,홍장후 한국공업화학회 2007 한국공업화학회 연구논문 초록집 Vol.2007 No.-

兒童の心理に立脚した綴方の基礎的啓培誘導實際(二)

丁寬植 朝鮮敎育會 1929 文敎の朝鮮 Vol.- No.41

참돔 (Pagurus major) 치어용 사료에 있어서의 대두박의 이용성과 적정 단백질${\cdot}$에너지 함량

정관식,JEONG Kwan-Sik 한국양식학회 1992 韓國養殖學會誌 Vol.5 No.1

참돔 치어에 있어서의 식물성단백질원의 이용성의 검토와 유효이용을 꾀하기 위하여, 대두박 및 콘글루텐 밀을 배합한 여러 종류의 실험사료를 제작하여 성장, 사료효율 및 어체성분에 미치는 영향을 조사하였다. 그 결과 사료중의 조단백질 및 조지폐함량이 각각 $47{\%}\;,20{\%}$ 구에서 뛰어난 성장 및 사료효율을 나타내었으며, 어분의 $20{\%}$를 대두박으로 대체하여도 성장 및 사료효율에는 아무튼 간제가 없는 것으로 판단되었다. 그리고, 원료대두박의 Ex 처리유무 및 사료의 제조법의 차이에 의한 영양가개선을 인정할 수 없었다. To test the availability of soybean meal as a protein source and to increase its effectiveness in the diets for the fingerlings of red seabream, some feeding trials were conducted. Two different types of diet, steam pellet and soft dry pellet, contained various levels of soybean meal, were used. The growth, feed efficiencies, and body compositions were examined after the feeding trials. Results of the experiments suggested that dietary protein level could be reduced from $52{\%}$ to $47{\%}$ by elevating dietary energy level from $13{\%}$ to $21{\%}$ with lipid. The best results of growth and feed efficiencies were achieved by the diet that containing $47{\%}$ of crude protein and $20{\%}$ of crude lipids. The growths and feed efficiencies showed no difference when $20{\%}$ of fish meal in the experimental diet were substituted by soybean meal. Therefore, $20{\%}$ of fish meal could be substituted by soybean meal without reducing growth rates or feed efficiencies of fingerling red sea bream.

가막만 해역에 방류된 감성돔, Acanthopagrus schlegeli 치어의 초기 먹이섭취 패턴과 어체성분 변화

정관식,이시우,지승철,유진형,김양수,명정구 한국양식학회 2007 韓國養殖學會誌 Vol.20 No.2

친환경 농수산 융합 양식 시스템

정관식 한국수산과학회 양식분과 2012 한국수산과학회 양식분과 학술대회 Vol.2012 No.6

兒童の心理に立脚した綴方の基礎的啓培誘導の實際

丁寬植 朝鮮敎育會 1928 文敎の朝鮮 Vol.- No.12

습사료에 비타민 C와 E 첨가가 넙치 치어의 성장과 체성분에 미치는 영향

정관식 ( Gwan Sik Jeong ),지승철 ( Seung Cheol Ji ),안창범 ( Chang Bum Ahn ),신태선 ( Tae Sun Shin ),유진형 ( Jin Hyong Yoo ) 한국수산과학회 2003 한국수산과학회지 Vol.36 No.2

N/A This study was conducted to investigate the supplementary effects of vitamin C and E to moist pellet on growth and body composition in juvenile olive flounder (Paralichthys olivaceus). Four groups of diet made : moist pellet (MP) diet group was used as the control group where the ratio of raw feed and commercial compound meal is 5:5 (CP 30%, CL 17%), vitamin C added group (VC), vitamin E added group (VE) and vitamin C and E added group (VCE). The supplementary amount of vitamin C and E corresponded to 1000 mg/kg (dry wt.) and 220 mg/kg (dry wt.), respectively. Vitamin C was destroyed 50% and vitamin E was destroyed 20% for manufacturing process. After 8 weeks feeding trial, weight gain was 121.9% in MP group, while it ranged from 180.5 to 184.9% in the VC, VE and VCE group. Feed efficiency was 71.6% in MP group, whereas it ranged from 78.7 to 80.6% in the VC, VE and VCE group, weight gain and feed efficiency of fish fed vitamin supplemented diets were significantly higher than control group and no significant difference among the vitamin added groups was observed (p>0.05). There were no significant differences in moisture, crude protein, crude lipid, crude ash, condition factor (CF), hepatosomatic index(HSI), and visceraweight index (VWI) of body composition. Hemoglobin (Hb) was 3.79% in MP group, whereas 4.99% in VC group, 4.55% in VE group and 5.07% in VCE group; Hb was significantly higher in the vitamin added groups than the control group (p<0.05). Vitamin C retention in liver was 18.1, 20.7, 46.6, 54.0 mg/kg in MP, VE, VC and VCE groups, respectively. Vitamin E retention in liver was 25.9, 53.8, 88.2, 124.5 mg/kg in MP, VC, VE and VCE groups, respectively. These results indicate that supplementation of vitamin C and E to moist pellet diet significantly improved growth and feed efficiency of ollive flounder, and the mixed addition of vitamin C (1,000 mg/kg dry wt.) and vitamin E (220 mg/kg dry wt.) did not lead to the synergy effect.

넙치, Paralichthys olivaceus용 습사료의 적정 지질 첨가량

정관식(Gwan Sik JEONG),지승철(Seung Cheol Ji) 전남대학교 수산과학연구소 2003 수산과학연구소논문집 Vol.12 No.-

A feeding experiment was performed for 8 weeks by experimental feed, in which fish oil was added as lipid source and energy to protein ratio (E/P) was adjusted, to investigate proper E/P of moist pellet (MP) diet for olive flounder, Paralichthys olivaceus. For addition of fish oil in the MP diet, non-added group as control, 3, 6, 9, and 12% added group were set up. E/P was increased in proportion to the added amount of fish oil in the range of 8.7~11.8. Growth rates of each group were 121.9%, 135.2%, 141.9%, 175.0%, and 165.7%, and significantly higher in the more than 6% of fish oil added groups (P<0.05). However, the 12% added group showed decrease in feed efficiency and growth rate compared to the 9% added group. Daily feed intake of each group were 2.21%, 2.28%, 2.42%, 2.72% and 2.79%, and significantly higher in the fish oil added groups (P<0.05). Protein efficiency ratio was significantly increased in all the groups added with fish oil, compared to the control group. As result of analysis on the body composition of olive flounder, there was no significant difference in moisture, crude protein and crude ash (P>0.05), however, crude lipid and hepatic lipid content of them showed significantly high values in the fish oil added groups (P<0.05). As result of this experiment, it is judged that optimal E/P ratio of MP diet was 10.1~10.3, and optimal addition level of fish oil to MP diet was 6~9%.

넙치용 습샤료의 항산화제 첨가효과

정관식 외 전남대학교 수산과학연구소 2003 수산과학연구소논문집 Vol.12 No.-

This study was conducted to investigate supplementaη effects of the antioxidant, antioxidant premix and ethoxyquin to moist pellet diet (MP). Experimental fish (average body weight, 40 g) were divided into 5 group and each group was fed with raw fish diet (diet 1), 8:2 (ratio of raw fish to commercial compound meal) MP (diet 2), 8:2MP with antioxidant premix (diet 3), 8:2MP with fresh oil and ethoxyquin (diet 4), 8:2MP with oxidized oil and ethoxyquin (diet 5) for 8 weeks. The Growth rate of fish fed diet 3 was the best (167.1%). The growth rates of diet 1, 4 and 5 (138.8%, 136.0% and 145.0%, respectively) were significantly higher than diet 1 (108.3%). Feed efficiency of fish fed diet 3, 4 and 5 (53.7- 55.9%) were significantly higher than diet 1 and 2 (45.6% and 49.0%, respectively). Crude protein and lipid contents of whole body fed the diet 3, 4 and 5 higher than those of diet 1 and 2. Also, these diet groups had higher hepatosomatic index (HSI), visceralsomatic index (VSI) and condition factor (C티 than the other diet groups.

넙치 인공종묘생산에 있어 막분리 여과 시스템을 이용한 수질환경의 개선

정관식 ( Gwan Sik Jeong ),안창범 ( Chang Bum Ahn ),오명주 ( Myung Joo Oh ),지승철 ( Seung Cheol Ji ),유진형 ( Jin Hyung Yoo ) 한국수산과학회 2002 한국수산과학회지 Vol.35 No.6

막분리여과 시스템을 이용한 수질환경의 조절과 인공종묘생산 어류의 성장에 미치는 영향을 조사하기 위하여 사육수의 수질분석, 세균상 조사 및 자어의 성장률 등을 조사하여 비교하였다. 실험구는 고압모래여과기구 (SFS)와 막분리여과시스템구 (UFS)을 두었으며, 수질에 대해서는 pH, 염분도, DO, SS, COD, NH_4^+, NO_2^-, NO_3^-, DIN, DIP를 분석하였다. 대부분의 분석항목에서는 SFS구와 UFS구에서 큰 차이가 없었으나, 염분도는 SFS구 33.5%, UFS구와 30.2%이었으며, SS는 SFS구 15.5mL/L, 7.0mL/L으로써 염분도와 SS에 대해서는 낮은 값을 나타내었다. 세균상 및 총균수의 변동에서 자연해수의 6×10^5 CFU/mL은 SFS구에서 약 1/6의 비율로 낮아지고 9일째 이후 총균수와 Vibrio 속이 급격히 증가하고 Acinetobacter속 및 Micrococcus속 세균이 급증하기 시작하였으나, UFS구에서는 Alteromonas속 세균의 일부가 남아있는 것 이외에 실험기간 중 안정적인 세균상을 유지하였다. 성장률은 SFS구가 전장 17.0mm (SGR 14.0)이었으며, UFS구가 18.8mm (SGR 14.3)로서 유의적으로 높은 성장을 나타내었다. 막분리여과시스템을 이용하여 무균해수를 종묘생산장에 공급하는 것은 수질환경의 안정과 제균효과에 의해 세균의 증식이 억제되므로 자치어의 사육환경이 안정적으로 유지되어 질 수 있는 것으로 판단된다. Water quality, bacterial phase and fish growth rate were analyzed in the process of artificial seed production of flounder (Paralichthys olivaceus) larvae to investigate the water quality in rearing tank using Ultra Filtration System (UFS), Sand Filtration System (SFS) and Ultra Filtration System (UFS) were set up in the experimental group. For the analysis of water quality, pH, salinity, DO, SS, COD, NH_4^+, NO_2^-, NO_3^-, DIN (dissolved inorganic nitrogen) and DIP (dissolved inorganic phosphate) were measured. There was no data difference between SFS group and UFS group in most analysis items, but the UFS group showed low salinity and low SS values, such that salinity was 33.5% in SFS group and 30.2% in UFS group and SS was 15.5 mL/L in SFS group and 7.0 mL/L for UFS group. For changes in bacterial phase and TBC (total bacterial counts), in SFS group, 6×10^5 CFU/mL in seawater decreased to the ratio of about 1/6, and TBC, Genus Vibrio and bacterial in the Genus Acinetobacter and Genus Micrococcus sharply increased after nine days, while stable bacterial phase was maintained low in UFS group during the experiment except for Genus Alteromonas. It is concluded that when water is supplied for artificial seed production with UFS, stabilization of water quality condition and inhibition of bacterial multiplication are possible. When production environment becomes stable, stable growth of fish becomes possible by reduction of environmental stress.