• Bulletin of the Korean Chemical Society
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• v.35 no.6
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• pp.1697-1702
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• 2014

A novel complex [$Zn(phen)(o-AB)_2$] [phen: 1,10-phenanthroline o-AB: o-aminobenzoic acid] was synthesized and characterized by elemental analysis and X-ray diffraction single-crystal analysis. The crystal crystallizes in monoclinic, space group P2(1)/c with $a=7.6397(6){\AA}$, $b=16.8761(18){\AA}$, $c=17.7713(19){\AA}$, ${\alpha}=90^{\circ}$, ${\beta}=98.9570(10)^{\circ}$, ${\gamma}=90^{\circ}$, $V=2.2633(4)nm^3$, Z = 4, F(000) = 1064, S = 1.058, $Dc=1.520g{\cdot}cm^{-3}$, $R_1=0.0412$, $wR_2=0.0948$, ${\mu}=1.128mm^{-1}$. The Zn(II) is six coordinated by two nitrogen and four oxygen atoms from the 1,10-phenanthroline and o-aminobenzoic acid to furnish a distorted octahedron geometry. The complex exhibits intense fluorescence at room temperature. Theoretical studies of the title complex were carried out by density functional theory (DFT) B3LYP method. CCDC: 898291.

• Journal of Fisheries and Marine Sciences Education
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• v.22 no.1
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• pp.79-90
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• 2010

This study referred to relevant literatures, collected professional advice, created the sphere of duty with considering the characteristics of marine products-marine transportation education and teachers' specialty, and researched the feasibility of duty sphere classified from 2nd of September in 2008 to 20th of October in 2008 by selecting 80 professional teachers at random teachers who were working in 4 schools that had local 1. As the result of this study, it is proper to classify the sphere of marine products-marine transportation professional teachers into teaching-learning sphere, actual training guidance sphere, life guidance sphere, class management sphere, administrative performance sphere, specialty extension sphere, academic-industrial cooperation and community connection sphere. 2. For the contents of each sphere of marine products-marine transportation teachers' duty, it is proper to systematize teaching-learning field with 32 contents of duty, actual training guidance field with 21 contents of duty, life guidance sphere with 18 contents of duty, class management sphere with 12 contents of duty, administrative performance sphere with 18 contents of duty, specialty extension sphere with 15 contents of duty, academic-industrial cooperation and community connection sphere with 9 contents of duty respectively.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.53 no.1
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• pp.107-111
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• 2020

In this study, we examined the maturation and spawning of yellowback seabream Dentex tumifrons using samples collected by monthly bottom trawling in Korean coastal waters from January to December 2018. We analyzed monthly changes in gonadosomatic index (GSI), maturity stage, histology, fecundity, and total length at group maturity. Spawning occurred in May and October. Fecundity varied with total length as F=1.3754TL^3.2664, with a range of 1,220 to 155,625 eggs per female. At group maturity, 50%, 75%, and 97.5% estimates of female total length were 18.4, 20.5, and 25.3 cm, respectively.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.53 no.1
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• pp.67-73
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• 2020

The maturity and spawning of the yellow goosefish Lophius litulon were studied using samples collected monthly from January to December 2018 from the coastal waters of Korea. We analyzed monthly changes in maturity stage, gonadosomatic index (GSI), total length (TL) at 50%, 75%, and 97.5% group maturity, egg diameter and fecundity. The spawning period was from January to June. The size of eggs spawned was between 0.30 to 1.28 mm. Fecundity varied between 328,314 to 1,624,783 eggs. The percentage of sexually mature females estimated from a logistic function was over 50% at 48.67 cm TL, 75% at 56.76 cm TL and 97.5% at 74.89 cm TL.

• Journal of the Korean Society of Fisheries and Ocean Technology
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• v.57 no.2
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• pp.117-126
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• 2021

Diet composition and trophic level of Trachurus japonicus were studied using 417 specimens collected by trawls, set nets and purse seine fisheries from March 2019 to February 2020 in the South Sea of Korea. The size of T. Japonicus ranged from 7.0 to 49.8 cm in total length. T. japonicus were a carnivore that fed mainly on euphausiids and pisces. In eddition, T. japonicus fed on small quantities of cephalopods, crabs etc. T. japonicus showed ontogenetic changes in feeding habits. The proportion of euphausiids decreased inversely proportional to body size whereas the consumption of pisces gradually increased. As body size of T. japonicus increased the mean number of prey per stomach and the mean weight of prey per stomach tended to increase, but the mean number of prey per stomach was not significantly different. As a result of the feeding strategy analysis, T. japonicus were specialized feeders with pisces and euphausiids as their dominant prey. The trophic level ranged between 3.57 ± 0.54 and 3.91 ± 0.65, and increased asymptotically with size of specimens. The average trophic level of the T. japonicus was 3.79 ± 0.61.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.54 no.1
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• pp.73-79
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• 2021

The feeding habits of Chub mackerel Scomber japonicus were investigated using 329 specimens collected from coastal waters of the South Sea of Korea. S. japonicus is mainly a piscivore, consuming small fish such as Engraulis japonicus (%RI: 81.0 %). The diet of Chub mackerel also includes small quantities of thaliaceans, euphausiids, and amphipods. We calculated the trophic level as 3.92 for S. japonicus. The dietary composition of S. japonicus did not show significant differences with size, but differed with season. As the body size of S. japonicus increased, the mean weight of prey within the stomach (mW/ST) increased (One-way ANOVA, P<0.05).

• Journal of Fisheries and Marine Sciences Education
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• v.24 no.3
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• pp.395-405
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• 2012

This study was investigated 35 government-authorized and officially approved textbooks for the Fisheries and marine high school which were published by the 2007 Revised Curriculum at 2009 for analyzing the objective and content domains concerning school the low carbon green growth education. Prior to the grounds of analyzing for the objective and content domains were presented, the factors of the grounds were made based on the low carbon green growth standards for the nation. According to the analysis, the findings which were as follows; 18(51.4%) in 35 textbooks and 666(6.4%) in 10,406 pages were related the low carbon green growth education in the course of the Fisheries and marine high school education. There were 37 participation domains, 27 information and knowledge domains, 9 value and attitude domains and 6 skill domains in the objective domains. The content domains were consisted of 33 green growth, 23 climate change, 10 energy conservation, 6 low carbon and 6 international cooperation.

• Journal of Digital Convergence
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• v.19 no.3
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• pp.437-444
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• 2021

The purpose of this study is to investigate the relationship between consciousness of marine safety, re-participation behavior of marine safety virtual reality experience education. For the study, participants in marine safety virtual reality experience education were surveyed from July to August 2020. Specifically, all participants were NakDanbo Water leisure center and Song-do Marine leisure center. A total of 300 participants were sampled using convenience sampling method, but 253 were finally used in the data analysis excepting incomplete or faithless questionnaires. the data analysis was conducted through frequency analysis, Cronbach's alpha, Exploratory Factor Analysis (EFA), correlation analysis, simple and Multiple regression analysis using SPSS 20.0. The results are as follows. Firstly, participants in marine safety virtual reality experience education positive impact on had a significant effect on consciousness of marine safety. Secondly, participants in marine safety virtual reality experience education positive impact on had a significant effect on re-participation behavior intention. Lastly, consciousness of marine safety had positive effects on re-participation behavior intention.

• Journal of Fisheries and Marine Sciences Education
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• v.4 no.2
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• pp.129-140
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• 1992

• Journal of Fisheries and Marine Sciences Education
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• v.7 no.1
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• pp.1-13
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• 1995