• Korean Journal of Food Science and Technology
• /
• v.10 no.1
• /
• pp.8-10
• /
• 1978

After growing the hot pepper fruits in polyethylene film(PE) house covered with white or red colored film, the fruits were collected and chlorophyll, carotenoid, and capsaicin content was analyzed. Although total chlorophyll content was higher in fruit of white PE house$(208.9{\mu}g/g-F.W)$ as compared to that of red PE house $(153.0{\mu}g/g-F.W)$ grown plants, the ratio of chlorophyll a over b were similar, giving 2.15 and 2.13 respectively in white and red PE house. Total carotenoid, $\beta$-carotene and the capsaicin content were higher in fruits of red PE house grown plants. Therefore, it is suggested that red film could be used as a successful covering material for poly ethylene film house.

• Korean Journal of Environmental Agriculture
• /
• v.6 no.2
• /
• pp.73-76
• /
• 1987

The effects of light, active oxygen, inorganic $SO_3\;^{-2}\;ion$, $SO_2$ fumigation duration, $SO_2$ concentration on the degradation of photosynthetic pigments in Green perilla (Perilla frutescens Suwon No. 8) fumigated by $SO_2$ were investigated inside a phytotron. The results were as follows: 1. With the increase of the $SO_2$ dosage, visible injury and the degradation of chlorophyll increased. 2. The degradation of chlorophyll b was less than that of chlorophyll a and the carotinoid was more easily degratated than chlorophyll b. 3. The degradation of chlorophyll by $SO_2$ fumigation was induced directly by $SO_2$, itself. 4. Light is necessary to the degradation of chlorophyll. $SO_2$ and $O_2^-$ made in the photolysis process of the water molecule were the major components in the degradation of chlorophyll.

• Korean journal of food and cookery science
• /
• v.29 no.1
• /
• pp.53-62
• /
• 2013

Lipid oxidation and antioxidants changes in perilla oil emulsion added with chlorophyll were studied during storage in the dark or under 1,700 lux light at $25^{\circ}C$ for 48 h. The emulsion was consisted of perilla oil (33.12 g), 5% acetic acid (66.23 g), egg yolk powder (0.5 g), and xanthan gum (0.15 g), and Chlorophyll b was added to the emulsion at 0, 2.5 and 4 mg/kg. The lipid oxidation was evaluated by headspace oxygen consumption and hydroperoxide formation, and tocopherols and polyphenols were monitored by HPLC and spectrophotometry at 725 nm, respectively. The lipid oxidation of the perilla oil emulsion in the dark was not significant regardless of the addition of chlorophyll. Light increased and accelerated the lipid oxidation of the emulsion, and increased addition level of chlorophyll under light increased it further. However, there was no significant change in fatty acid composition in any case. Contents of tocopherols and polyphenols in the emulsion were not significantly changed during storage in the dark regardless of chlorophyll addition, indicating their little degradation. Tocopherols and polyphenols in the emulsion were significantly degraded during storage of the emulsion under light, and the degradation rate of polyphenols was increased with addition level of chlorophyll. The lipid oxidation of the perilla oil emulsion was inversely related with the residual amounts of tocopherols and polyphenols, with more dependent on the retention of polyphenols than that of tocopherols.

• Journal of the speleological society of Korea
• /
• no.8
• /
• pp.43-54
• /
• 1998

The plant life of caves is made up of species that can live in total darkness. If any plant in a cave contains chlorophyll, the chlorophyll obviously cannot be energized by light rays from th sun. With a few exceptions noted below, none of the plants in the perpetually dark zone contains chlorophyll. The chief plant life there consists of bacteria, including actinomycetes, and fungi.(omitted)

• Korean Journal of Ecology and Environment
• /
• v.41 no.4
• /
• pp.485-489
• /
• 2008

Algal chlorophyll-$\alpha$ is commonly determined by spectro-photometric method using 90% acetone as solvents. However, acetone has low extraction efficiency without grinding filters, and DMF (dimethyl formamide) was tested for the compatibility with acetone. Chlorophyll-$\alpha$ concentration was determined for samples from 5 reservoirs of different trophic states and phytoplankton composition, using acetone extraction with grinding and DMF without grinding. Chlorophyll-$\alpha$ measured by DMF and Acetone did not show a significant difference when using trichromatic method of UNESCO and Lorenzen, and therefore, DMF can substitute acetone. But when acidification method was applied, they showed significant difference of 8%. It can be concluded that DMF can extract chlorophylls more effectively without grinding and it can be a better alternative for the standard extraction solvent.

• Journal of Ginseng Research
• /
• v.14 no.2
• /
• pp.135-141
• /
• 1990

In order to elucidate the mechanism of the leaf-burning disease of ginseng (Panax ginseng C.A. Meyer), the relationships between thylakoid membrane peroxidation and chlorophyll bleaching were investigated in comparison with the ones of soybean (Glycine max L). When I measured the rate of lipid peroxidation in the thylakoids of ginseng and soybean by irradiation of light(60 w.m-2), it was identified that, the remarkably lower rate of lipid peroxidation was found in the ginseng thylakoid than the case of soybean. When lipid peroxidation of ginseng thylakoid was induced in the dark, chlorophyll contents of thylakoid was not changed. The results suggest that lipid peroxidation does not affect the chlorophyll bleaching in ginseng thylakoid. Thylakoid membrane peroxidation as well as chlorophyll bleaching was closely related with photosynthetic electron transport. But, according to the quenching experiment active oxygen species induced lipid peroxidation may be different species in the case of chlorophyll bleaching.

• Journal of Environmental Science International
• /
• v.1 no.2
• /
• pp.69-80
• /
• 1992

Effects of light on leaf senescence of Phseolus vulgaris were investigated by measuring the disassembly of chlorophyll-protein complexes in detached leaves which had been kept in the dark or under light. The loss of chlorophyll accompanied by degradation of chlorophyll- protein complexes. PSI (photosystem I) complex containing LHCI (light harvesting complex of PSI) apoproteins was rapidly decreased after the early stage of dark-induced senescence. RC(reaction center)-Cores was slightly increased until 4 d and slowly decreased thereafter. As disassembly of LHCII trimer progressed after the late stage of senescence, there was a steady increase in the relative amount of SC(small complex)-2 containing LHCII monomer. On the other hand, white and red light adaptation caused the structural stability of chlorophyll-protein complexes during dark-induced senescence. Particularly, red light was more effective in the retardation of LHCII breakdown than white light, whereas white light was slightly effect in protecting the disassembly of PSI complex compared to red light. These results suggest, therefore, that light may be a regulatory factor for stability of chlorophyll-protein complexes in the senescent leaves.

• Fisheries and Aquatic Sciences
• /
• v.3 no.1
• /
• pp.8-13
• /
• 2000

Monthly mean chlorophyll concentration in the East Sea was estimated from the ocean color observed by the Coastal Zone Color Scanner (CZCS) on Nimbus-7 satellite which had performed various remote sensing missions from 1979 to 1986. The areas of high chlorophyll concentration were found in the sea between Siberia coast and Sakhalin Island, in the Donghan Bay and in the Ulleung Basin. In the southwestern East Sea, especially in the area near Ulleung Island, the yearly maximum chlorophyll concentration occurred in December. The chlorophyll concentration in Ulleung Basin in December was about two times higher than during spring bloom in April. The early winter bloom occurred in the warm side of the front that was formed between warm water from the East China Sea and nutrition rich cold water from the northern East Sea.

• Journal of Korean Society of Forest Science
• /
• v.42 no.1
• /
• pp.55-58
• /
• 1979

The leaf tissues of 8 Populus species were examined to compare the chloroplast number and feature in guard cells and chlorophyll quantity. 1. The chloroplast number ranged from 10 to 30, but difference in number were not significant among species. 2. The size of chloroplast varied from $3m{\mu}$ to $6m{\mu}$, in diameter. The shape was generally circular. 3. The chlorophyll quantities were significantly different among species. 4. The amount of chlorophyll b was 2.4 to 3.2 times greater than that of chlorophyll a.

• Korean Journal of Microbiology
• /
• v.5 no.1
• /
• pp.20-23
• /
• 1967

I studied about temperature and pH concentration having influence upon chlorophyll decrease on the Glucose culture of Chlorella variegata Beijerinck(211/10a). I cultured under $25^{\circ}C$(standard), $15^{\circ}C$ and $35^{\circ}C$ and compared with each other. The culture of $15^{\circ}C$ didn't have any large difference with the standard culture($25^{\circ}C$) but the culture of $35^{\circ}C$ had a large amount of chlorophyll decrease without carbohydrate accumulation, stimulation of cell division and nitrogen-deficiency. Chlorella variegata had optimum pH 6.5-7 and was a little weak in all phenomenon under pH 8 rather than under pH 6.5-7. Under pH 5 they had deep chlorophyll decrease without phephytin.