온도; pH, 염분 내성 및 충격이 개불, Urechis unicinctus 유생에 미치는 영향

최상덕,김호진,라성주,정형택,윤호섭,신종암,이원교 國立 麗水大學校 環境問題硏究所 1999 環境硏究論文集 Vol.2 No.-

The effect of different temperature, salinity and pH on survival rate of Urechis unicinctus's swimming embryo was examined to develop the method for the efficient seed production. In addition to, this study was designed to investigate the possibility of pollutant marker diagnosis of marine pollutions by the change in different temperature, salinity and pH. Treatment was carried out whit different temperature (5˚C, 10˚C, 17˚C, 20˚C, 25˚C,), salinity(0‰, 10‰, 20‰, 30‰, 34‰, 40‰) and pH(4, 6, 7.2, 8.2, 9.2, 10). All the swimming embryo of the temperature experiment was survived within all experiment section, but the others experiment were not. At the temperature-shock and tolerance experiment ranging from 5˚C to 25˚C the survival rate was occurred: 75%, 95%, 100%, 100%, 50%, at the ph-Shock experiment ranging from 4 to 10, the survival rate was occurred: 0%, 50%, 85%, 100%, 60%, 0%, at the pH-tolerance experiment ranging 4 to 10 the survival rate was occurred : 0%, 75% 90%, 100%, 80%, 0%, and at the salinity-shock experiment ranging from 0% to 40% the survival rate was occurred : 0% 10% 90% 95% 100% 0% , at the salinity-tolerance experiment ranging from 0% to 40% , the survival rate was occurred : 0% 0% 90% 100% 100% 0%. These results suggest, that the survival rate of larvae of Urechis unicinctus was the highest at 17˚C, 34%. pH8.2 and this Urechis unicinctus could be live at the zone of euryceious and zone of euryhalines

가막만 패류양식장의 수질 및 저질특성

최철웅,문성용,윤호섭,라성주,한종석,최상덕,이우범 國立 麗水大學校 環境問題硏究所 2002 環境硏究論文集 Vol.5 No.-

This study was performed to characterize the seasonal fluctuation of water quality and sediment environment from April, 2001 to November, 2001 in Gamak bay. Which was a productive area, but recently its fisheries conditional have been deteriorated because of increasing waste-water from municipal area, industry and autochthonous pollution by farm industry. In the survey of seawater quality, DO and COD concentrations were lowest in bottom layer at summer, but DIN and DIP contents were higher than those in surface layer. Eutrophication indices mean that eutrophication area move from south to north entrance via northern-west inner area with seasonal change from summer to autumn. In the survey of sediment environment, ignition loss(IL), chemical oxygen demand(COD), DIN and Dip were in the range of 3.8~15.7%, 10.3~60.6mg/g-dry, 5.053~1.810mg/ℓ and 0.065~0.324mg/ℓ , respectively. COD in sediment were highest at winter and spring. And, they were higher than sediment standard in the south inner area, which mean heavily polluted conditions with organic constituents.

이미드 화합물의 함량이 에폭시수주의 물성에 미치는 영향

최호섭,유공식,최상구 群山大學校 自然科學硏究所 1991 自然科學硏究 Vol.6 No.-

이미드반응물[Ⅰ] (DIDCA, diimido dicarboxylic acid), DIDCA와 에폭시를 50/50으로 반응시킨 이미드반응물[Ⅱ], DIDCA와 에폭시를 30/70으로 반응시킨 이미드반응물[Ⅲ]을 합성하였다. 반응물을 전체 액상성분중 0∼50%(중량%) 범위에서 각각 에폭시수지와 혼합하였다. 혼합물에 대하여 경화성질, 열적성질, 기계적성질, 파단면 등을 조사하였다. 이미드반응물을 포함하는 에폭시수지의 경화시간응 포함하고 있지 않은 것보다 빠르게 나타났다. 굴곡강도와 Tg는 이미드반응물 함량 20∼30%(중량)에서 가장 높은 값을 나타내었다. 이미드반응물[Ⅱ]는 섞임성, 기계적성질, 열적성질 등에서 다른 것보다 더 우수하였다. Imide compound [Ⅰ](DIDCA, diimido dicarboxylic acid), imide compound [Ⅱ](reactant of DIDCA/epoxy=50/50) and imide compound[Ⅲ](reactant DIDCA/epoxy=30/70) were each synthesized into chemical reaction. These were seperatly mixed with epoxy resin at a ratio 0∼50%(wt. %) of liquid component. Cure, thermal, mechanical and fractural properties were tested for mixtures. Cure-time of epoxy resin containing imide compound was more fast than uncontaining. Flexural strength and Tg represented vest at imide compound content 20∼30%. Imide compound[Ⅱ]was more excellent than others in miscible, mechanical and thermal properties.

소음·진동에 따른 참전복(Haliotis dissus hannai)의 행동·생태학적 변화

최상덕,정형택,윤호섭,안치영,이삼노,이우범 國立 麗水大學校 환경문제硏究所 2001 環境硏究論文集 Vol.4 No.-

These days, the underwater excavation and the piling work have been commonly used to reclaim land and to build a breakwater. As the piling work generates high underwater sound pressure in all direction, various kinds of marine organisms are largely affected even if they live a long distance from the piling work. Therefore, this paper describes the relationship between the behavior of abalone(Haliotis discus hannai) of 50cm long and the environmental noise level with vibration due to the piling work. We have separated the research into two parts. The one is continuance impact, the other is intermittent impact. The following are the results obtained from the present investigation: Comparing 0.5cm/sec vibration with 50dB noise and 0.9cm/sec vibration with 60dB, the previous one show a faster reaction speed than the later one. Futhermore the later one showed that pulling up on their shell, in order to avoid the epidemic, moving around, small organisms are included to hide under big organisms, alerting posture. However we couldn't find a consistent standard in our research.

가막만에 분포하는 대형저서동물의 계절적 분포 및 출현

최상덕,문성용,안치영,윤호섭,정형택,이삼노,서호영 國立 麗水大學校 환경문제硏究所 2001 環境硏究論文集 Vol.4 No.-

This study was coducted to describe the distribution and appearance pattern of macrobenthos in Kamak Bay, the southern coastal of Korea. Sampling was perfound seasonally using Van Veen grab(0.1㎡) from April 2001 to December 2001. A total of 22 macrobenthic species occured: Bivalvia accounted for 12 species(55%), and Mollusca 5 species(23%). The mean density of macrobenthos was 153.9ind./㎡, a major dominant species were a Bivalvia, Paphia undulata(28.3ind./㎡), and a Cirripedia, Chthamalus challengeri(5ind./㎡), which frequency occur in the costral area. These species showed very low density at station 1 in the Kamak Bay.

소양호에서 세균수와 세균 체적의 계절적 수심별 변화

안태석,최승익,변명섭,박호완 江原大學校 附設 環境硏究所 1998 環境硏究 Vol.15 No.-

To define the ecological roles of bacteria in Lake Soynng, the depth profiles of bacterial numbers and their biovolume were estimated temporally. In August, 1992, the bacterial numbers and biovolume were ranged from 12×10^(5) to 28×10^(5) cells ml^(-1) and from 0.4 to 1.0 ㎛³ cell^(-1), respectively. At 30m depth, the biovolume was highest as 1.0㎛³ cell^(-1) while the numbers were not changed. These large bacteria might be allochthonous bacteria originated from terrestrial during the heavy rain. In October, 1882, the bacterial numbers were ranged from 6×10^(5) to 17×10^(5) cells ml³ , and biovolumes at epilimnion were about 0.5 ㎛³ cell^(-1), while at metalimnion and hypolimnion, larger than 0.9 ㎛³ cell^(-1). In this time, zooplankton grazing pressure and nutrients release from sediment might affect the bacterial numbers and biovolume. In April, 1993, when Asterionella and Fragifaria were dominant species of phytoplankton only in epilimnion, the bacterial numbers were about 20×10^(5) cells ml^(-1), and biovolumes were about 0.8㎛³ cell^(-1). While at other depths, the numbers and biovolumes were smaller. These results suggest that the bacterial numbers were dynamically changed with season, while their mean cell volume were commonly stable as 0.5㎛³ cell^(-1). But by the allochthonous bacteria, organic materials released by phytoplnnkton and grazing pressure by zooplankton might increase the biovolume.

감성돔, Acanthopagrus schlegeli의 종묘생산 및 성분화에 미치는 영향

한종석,김용구,라성주,윤호섭,이원교,김정,최상덕 國立 麗水大學校 環境問題硏究所 2002 環境硏究論文集 Vol.5 No.-

This study was carried out to produce the seeding of the larvae and juvenile of black sea bream, Acanthopagrus schlegeli in terms of artificial hatching, feeding behavior and growth rate in each factor. Total length of black sea bream larvae hatched was 2.57±0.35mm and after 50 days, total length was 22.08±3.74mm, 49.7% in survival rate. This research was conduced to confirm the effect of tributyltin and 2,4-dinitrophenol on the sex differentiation in Black Sea bream, Acanthopagrus schlegeli. Fish were reared of oral administration of tributyltin at 0.05, 0.5, 5㎍/g and 2,4-dinitrophenol at nominak concentration of 0.05, 0.5, 5, 50㎍/g diet from 156 days to 185 days after hatching. In the process of the differentiation until 156 days after hatching, gonads were composed testis. In contrast, 185 days after hatching, testis were composed of a number of spermatogonia and sperm duct. The female in the control in which sex differentiation of Acanthopagrus schlegeil was normally conducted was 100%. The experimental unit of estradiol-17β, it was 100% in 0.05㎍/g diet concentration, which was similar to the sex ratio of the control. And it was 100% in 0.5㎍/g diet concentration. In each experimental unit with 5, 50㎍/g diet concentrations, every individuals of them differentiated to males. About the experimental unit of tributyltin, the females were 100%, 100%, 100%, 100% and 100% in 0.05㎍/g, 0.5,㎍/g, 5㎍/g and 50㎍/g diet concentrations, respectively. About the experimental unit of 2,4-dinitrophenol, the males were 100% tn 0.05, 0.5, 5, 50㎍/g diet concentrations, respectively.

Stomach Contents of the Southern Rough Shrimp Trachysalambria curvirostris (Stimpson) in the Coastal Area of Yeosu, Korea

( Ho Seop Yoon ),( Ho Young Soh ),( Sang Duk Choi ) 한국환경생물학회 2003 환경생물 : 환경생물학회지 Vol.21 No.4

N/A The southern rough shrimp Trachysalambria curuirostris (Stimpson) was monthly sampled from the coastal area of Yeosu, Korea from June 2000 to May 2001 and its stomach contents were investigated. Mysids and amphipods were the most dominant prey, comprising >40% of the diet in both lo occurrence and lo abundance. In particular, mysids were most important food without regard to seasons, size classes, or sexes. The abundance and occurrence composition of food items showed a seasonal fluctuation mysids and amphipods were the predominant prey items in spring (33.8%), summer (41.1%), autumn (43.9%), and winter (49.2%). For small-sized shrimps (<25 ㎜ CL), mysids and amphipods consist of more than 45% of its food in both 7% abundance and % occurrence. For large-sized shrimps ( >25 ㎜ CL), these were clearly dominant. The quantities and items of food did not differ in both genders, which mainly fed on mysids and amphipods. The trophic diversity and equality of diet varied with seasons and size classes. The diet diversity for smaller shrimps was highest in spring, while that for the larger shrimp lowest in winter. Also, the mandibular structure of Trachysalambria curuirostris indicates that the species is carnivorous.

CHANGES OF HEMATOLOGICAL CONSTITUENTS OF BLACK SEA BREAM, Acanthopagrus schlegeli BY NIGHT-ILLUMINATION

Ho Seop Yoon,Yun Keun An,Kyeong Ho Han,Won Kyo Lee,Sung Hoon Lee,Jae Ho Hwang,Sang Duk Choi 한국수산과학회 양식분과 2015 한국수산과학회 양식분과 학술대회 Vol.2015 No.5

EVALUATION OF THE ℓ.I INTEGRALS ON HYPERFINE INTERACTIONS

Choi,Ho-Seop,Kim,Dong-Hee 群山大學校自然科學硏究所 1988 自然科學硏究 Vol.3 No.-

공통 좌표계로 표시된 4p 원자궤도 함수의 전자 파동 함수에 대한 초미세 상호작용(hyperfine interactions)중 ℓ.I적분의 지름부(radial part)와 각부분(angula part)을 계산하여 이들을 analytic form으로 나타내었다. 이 ℓ.I 적분은 4p 원자궤도 함수에 대한 NMR 화학이동을 계산하는데 이용할 수 있다. For the electronic wave functions for |4p> atomic orbitals expressed in common coordinate system, both the radial part and the spherical polynomial part of the ℓ.I integrals on hyperfine interactions have been evaluated and expressed in analytical form. The ℓ.I integrals may be used to calculate the NMR chemical shift for |4p> atomic orbital.