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이진환,유광일 한국해양학회 1987 韓國海洋學會誌 Vol.22 No.3
A study on the fine structure of the marine diatoms has been carried out for taxonomical purpose during the periods from September 1983 to March 1987 in Korean coastal waters. Fine structure of smallThalassiosira(Bacillariophyceae) was studied by means of light microscope and scanning electron nisroscopy. Secondarily, six species of Thalassiosira were identified and described. Of these Thalassiosia allenii, T. binata and T. conferta were new records for Korean coastal waters. Thalassiosira aestivalis, T.allenii, T.binata, T.conferta, and T. pacifica have a valve with a single labiate process and one central and one marginal ring of strutted processes, but T.rotula has many central strutted processes close together instead of one central strutted process.
한국연안역의 부유성 규조류의 미세구조에 관한 연구 Thalassiosira 속 1.
이진환,유광일 한국해양학회 1986 韓國海洋學會誌 Vol.21 No.3
A study on the fine structure of the marine diatom has been carried out for taxonomical purpose during the period from Fib. 1982 to Feb. 1986 in Korean coastal waters. Fine structure of small Thalassiosira (Bacillariophyceae) was studied by means of light and scanning electron microscopy. Firstly, four species of Thalassiosira were identified and described. Of these Thalassiosira weissflogii, T.minima and T.oestrupii var venrickae were new records for Korean coastal waters.
이진환,이진이,김미옥,LEE, JIN HWAN,LEE, JIN YI,KIM, MI OCK The Korean Society of Oceanography 1993 韓國海洋學會誌 Vol.28 No.3
SEM and LM studies were made to examine the frustule of the marine epizoic diatom Pseudohimantidium pacificum Hustedt & Krasske and to examine the variability of frustule morphology. The length of the apical axis and the transapical axis were similar to other reports. but Number of labiate processes showed a variation. the Number of striae of Korean specimens were similar to those of other regions, but the areolae shape of striae showed elliptical type. Pseudohimantidium pacificum were palnktonic, tychopelagic or epizoic attached to the prosome, the genital segment and abdomen of corycaeus affinis. this species was newly recorded I Korean waters and the biogeographic boundary of this species can therefore be extended to the northern Pacific Ocean.
통영 바다목장 해역에서 식물플랑크톤군집에 미치는 환경요인의 영향
이진환,정승원,김종만 한국해양과학기술원 2005 Ocean and Polar Research Vol.27 No.1
Abstract : In order to investigate the structures and dynamics of phytoplankton communities, each physicochemical environmental factor, species composition, standing crop, and dominant species were examined in the marine ranching ground of Tongyeong coastal waters from April to October, 2000. During the studies, mean water temperature and salinity were 18.8oC and 33.1 psu, respectively. DO, SS and transparency varied from 5.43 to 11.39 mg/l, 14.6 to 32.4 mg/l and 3.5 to 9.0 m, respectively. Light intensities varied from 0.02 to 966 mE/m2/s, which decreased with depth. NH4-N, NO3-N, NO2-N, PO4-P, and SiO2-Si were fluctuated from 0.059 to 0.332 mg/l, 0.040 to 0.800 mg/l, 0.001 to 0.468 mg/l, 2.3 to 143.0 mg/l, and 0.007 to 0.600 mg/l, respectively. chlorophyll a concentrations were fluctuated from 0.7 to 8.9 mg/l. Among 130 taxa of phytoplankton communities observed, diatoms occupied more than 81.54% of the total species, and the others were dinoflagellates and silicoflagellates. Phytoplankton standing crops ranged from 4.6 × 104 to 2.6 × 106 cells/l. In October, the standing crops were at bloom level showing more than 106 cells/ lat all stations. Dominant species changed by month and station. Leptocylindrus danicus occupied 59.84% in April and 22.03% in June. Pseudo-nitzschia pungens in August and Chaetoceros socialis and Skeletonema costatum in October were predominant species. In order to investigate factors influencing the total phytoplankton standing crops the correlations between the standing crops of diatoms, dinoflagellates, all phytoplanktons occurred and environmental factors were calculated using a multiple regression analysis. The coefficient of determination (R2) for total standing crops was 0.63 which explained 63% of variance and that of R2 for diatom was 0.82. In statistical analysis, the results showed that the environmental factors influencing the size of the communities were predominantly water temperature, salinity and silicate.
이진환 부산대학교 학생생활연구소 2002 硏究報 Vol.34 No.-
The purpose of this study was to identify the items which could measure individuals' Interpersonal Disposition for Trust, using modified Interpersonal Trust Scale. Subjects were 1,270 undergraduate students of 2001 PNU Freshmen(450) and Freshwomen(820). The result of Factor Analysis(Principal Factor Analysis, Varimax Rotation) and Regression Analysis indicated 9 items could be used as subscale measuring Interpersonal Disposition for Trust. Factor Analysis(Principal Factor Analysis with the number of factor 2, Varimax rotation) indicated one factor was positive statements factor and the other factor was negative statements one. Four factors were extracted by Factor Analysis(Principal Factor Analysis with the number of factor 4, Varimax rotation). First factor was Evaluation of Reliability of various people(8 positive statements), Second factor was Interpersonal Disposition for Trust(5 negative statements), Third factor was Evaluation of Reliability of various people(4 negative statements), and Fourth factor was Interpersonal Disposition for Trust(4 positive statements). Regression Analysis(with stepwise method) indicated only the Second and the Fourth Factors explained Anxiety, and Depression. And Regression Analysis(with stepwise method) indicated the Second, the Fourth, and First Factors explained Stress. Items of Second and Fourth factors were combined and were assumed representing Interpersonal Disposition for Trust. Items of First and Third factors were combined and were assumed representing Evaluation of Reliability of various people. Regression Analysis(with stepwise method) indicated only the Interpersonal Disposition for Trust factor explained Anxiety and Depression. Another Regression Analysis(with stepwise method) indicated Stress could be explained by the Interpersonal Disposition for Trust factor and Evaluation of Reliability of various people.