• Journal of Microbiology and Biotechnology
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• v.13 no.5
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• pp.687-691
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• 2003

Whole-cell immobilization of the hydrocarbon rich microalgae, Botryococcus braunii and B. protuberans, in alginate beads under air-lift batch cultures resulted in a significant increase in chlorophyll, carotenoid, dry weight, and 1ipid contents at stationary and resting growth phases, as compared to free cells. Photosynthetic activity in both the species, of Botryococcus was enhanced, relative to free cells, at any growth phase of cultures. Immobilization exerted a protective influence on ageing of the cultures as reflected by higher chlorophyll and dry weight contents. Entrapment also stabilized the chlorophyll and carotenoid contents even at stationary and resting phases as compared to free cells in both the species.

• Proceedings of the KSRS Conference
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• v.1
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• pp.479-482
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• 2006

The absorption coefficient and backscattering properties of phytoplankton were calculated from the Mie theory. Given a simple case that phytoplankton and mineral particles are the only constitutions in seawater, the reflectance $b_b({\lambda})/[a({\lambda})+b_b({\lambda})]$was analyzed. Then the chlorophyll concentrations were estimated from remote sensing OC2 algorithm. The results show that reflectance in short wavelength region is more sensitive to the Chl variation; High mineral concentrations in seawater have significant influence on the reflectance spectrum; the existence of high mineral concentration may result in the mistake in chlorophyll estimation from OC2 algorithm.

• Journal of Plant Biology
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• v.31 no.3
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• pp.217-226
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• 1988

Effects of simazine [2-chloro-4,6-bis(methylamino)-s-triazine] on the photochemical reactions of isolaed spinach chloroplasts and crude thylakoids of Anabaena inequalis UTEX B-381 were compared. Simazine inhibited photosynthetic O2 evolution and increased the chlorophyll fluorescence in whole cells of Anabaena. The electron transfer from diphenylcarbazide to 2,6-dichlorophenolindophenol was inhibited by simazine treatment in spinach chloroplasts, but not in crude thylakoids of Anabaena. In spinach chloroplasts, the chlorophyll fluorescence was increased by simazine treatment in the presence of diphenylcarbazide and ferricyanide, but not in the presence of diphenylcarbazide and silicomolybdate. In crude thylakoids of Anabaena, simazine treatment did not increase the chlorophyll fluorescence in the presence of either diphenylcarbazide and silicomolybdate, or diphenylcarbazide and ferricyanide. There results suggest that the inhibitory site of simazine on photosynthetic electron transport chain of anabaena is different from that of spinach chloroplasts. And there may be a possiblity that the inhibition site of simazine in Anabaena lies on the donor side of photosystem II, before the site of electron donation by diphenylcarbazide.

• Food Science and Preservation
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• v.10 no.1
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• pp.32-36
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• 2003

Quality stability of the dried layer Porphyra tenera depending on various light sources, water activities, packaging materials and storage temperatures were investigated by peroxide value and chlorophyll degradation. Major fatty acids of dried layer were 45.7％ eicosapentaenoic acid and 13.6% palmitic acid. Quality stability was increased in order of darkness, incandescent and fluorescent increased sharply with the decrease of water activity and temperature, and also improved by the packaging material with strong barriers of water vapor, oxygen and light.

• Journal of the East Asian Society of Dietary Life
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• v.15 no.3
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• pp.306-314
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• 2005

This study was carried out to examine physicochemical characteristics of three kinds of commercial spinach produced from three areas(Gyeongbuk Yeongdeok Younghea, Gyeongnam Tongyeong Yongnam, Gyeongnam Tongyeong Gwangdo) in autumn of 2004. The length, weight, moisture, minerals, oxalic acid, chlorophyll, vitamin C, and Hunter's color values of spinach leaves and stem; were determined. Mg, Ca, Na, K, chlorophyll, and vitamin C contents of leaves were higher than those of stems. On the other hand, stem; showed higher contents in Fe, P and oxalic acid Moisture, Mg, Na, Fe, chlorophyll, and vitamin C contents in the spinach leaves from Gwangdo were higher than those from Yongnam and Younghea, but oxalic acid lower a little.

• Journal of the Korean Society of Tobacco Science
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• v.21 no.2
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• pp.152-159
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• 1999

A CAB cDNA clone(pKGCAB) encoding the light harvesting chlorophyll a/b binding protein of the semi-shade plant, Korean ginseng(Panax ginseng C. A. Meyer) was isolated by the one-way path random sequencing of ginseng cDNA library clones and transgenic tobacco plants(Nicotiana tabacum NC82) were produced by the transformation of this ginseng CAB gene in use of Agrobacterium tumefaciens LBA4404. The CAB gene showed type 1 structure of LHCP-II, 84% similarity in nucleotide sequence and 92% in amino acid sequence to that of Nicotiana tabacum CAB40, respectively. Seed germination and initial growth of the transgenic tobacco plants transformed with the cDNA fragment were accelerated under low light intensity compared with those of normal tobacco plant, that may result from the higher light sensitivity of the transgenic plants than that of the normal.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2000.10a
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• pp.169-170
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• 2000

Phytoplankton communities are generally dominated by diatoms in spring and changed to nano- and picoplankton or dinoflagellates groups in summer (Anderson et al., 1994). Many phytoplankton investigators have been used to chlorophyll a as a phytoplankton biomass, as all the phytoplankton contain (Cullen, 1982). The studies of population compositions, primary productivity, chlorophyll a of phytoplankton in the Yellow Sea have been conducted mainly in bays and estuaries with a few studies in the central area of Yellow Sea. This study is to understand the relationship between the environmental factors and cholrophyll a concentration of phytoplnakton in terms of the area and depth in the Yellow Sea and also to identify the characteristics of phytoplankton populations occurring at the most productive periods throughout the yera.

• Proceedings of the Korean Environmental Sciences Society Conference
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• 2006.11a
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• pp.283-284
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• 2006

해초지와 해초가 없는 수괴에서 식물플랑크톤의 군집 특성을 비교 분석하기 위하여 해황과 해초지의 규모가 다른 가막만의 원포연안과 여자만의 백일도 주변 해역에서 식물플랑크톤을 채집하고, 수온, 염분, 용존산소, Chlorophyll a와 영양염을 2006년 2월부터 8월까지 조사하였다. 조사 기간동안 해초의 유무에 따른 수온과 염분의 차이는 보이지 않았으나, 용존산소, Chlorophyll a와 영양염 농도는 유의한 차이를 보였다. 또한 거머리말 해초지와 조사 시기에 따른 수온, 염분, 용존산소, Chlorophyll a와 영양염 농도도 유의한 차이를 보였다. 그리고, 원포의 수온은 백일도보다 낮았으나, 염분은 유의하게 높았다. 식물플랑크톤의 현존량과 종조성은 조사 시기에 따라 차이를 보였으며, 현존량은 해초지에서 낮게 나타났다.

• Ocean and Polar Research
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• v.34 no.1
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• pp.29-35
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• 2012

We investigated the interannual relationship between chlorophyll concentrations in the western North Pacific and tropical cyclones (TCs) in the western North Pacific by analyzing data collected for >12 years. Despite the short-term scale (2~3 weeks) in the contribution of tropical cyclones to phytoplankton, the current study revealed that the long-term chlorophyll variability in the western North Pacific is profoundly related to long-term variability in the frequency of TCs. It was also found that the Pacific decadal oscillation (PDO) tends to control such relationships between the 2 bio-physical systems. This result suggests a significant climatic relationship between TC activity and marine phytoplankton, and also suggests the possibility of more accurate estimations of primary production in the western North Pacific.

• Proceedings of the Korea Society of Environmental Biology Conference
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• 2004.05a
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• pp.24-24
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• 2004

This study was investigated to the seasonal variation of attached diatoms communities in the Hantan River in November 2001, February, Ma and August 2002. It was identified the total 107 taxa which were composed of 95 species, 11 varieties and 1 unidentified speCies. The standing crops ranged 298,5004,776,000cells${\cdot}cm^{-2}.$and showed marked irregularly seasonal variations. It was higher value at the lower station than the upper station in fall. But it was similar values from the upper to the lower station by the effect of typhoon in summer. Chlorophyll concentrations ranged $13.4~304.2{\mu}m{\cdot}cm^{-2}.$ Standing crops and chlorophyll showed similar trends during investigation. Low diversity index values probably indicated the effects of envi~onmental stresses(water temperature, flow and current velocity) other than organic pollution. An assessment of organic pollution using epilithic diatoms(DAlpo) was $\alpha$-oligosaprobic states at the upper and mid stations, and was $\alpha$-mesosaprobic states at the lower stations.