• Asian Journal of Turfgrass Science
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• v.11 no.4
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• pp.281-288
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• 1997

This study was performed to find out the mineral cycles of sulphur in dynamic grassland ecosystems in a steady state condition at the northwest side on Mt. Kwanak. The experimental results may be summarized on the communities of a Zoysia japonica and a Miscanthus sinensis as follows. As compared with some properties of the surface soils among two semi-natural grasslands, sulphur war greater quantity in a Miscanthus sinensis than in a Zoysia japonica on Mt. Kwanak . For the case of steady production and release, the raion of annual mineral production to the amount accumulated on the top of mineral soil in a steady state provides the estimates of release constant k. The release constants on sulphur of the litter were 0.54 in a Zoysia japonica and 0.36 in a Miscanthus sinensis grassland. The half times of S required for the release or accumulation of the litter on the grassland were 1.28 years in a Zoysia japonica and 1.93 years in a Miscauthus sinensis The amounts of annual cycles for sulphur in the grassland ecosystem under the steady-state conditions were 20.65g /$m^2$ in a Zoysia japonica and 26.28g /$m^2$ in a Miacanthus sinensis grassland. Key words: Zoysia japonica Miscanthus sinensis Mt. Kwanak, Sulphur, Mineral cycles.

• Korean Journal of Medicinal Crop Science
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• v.12 no.1
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• pp.43-46
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• 2004

In genus Angelica, three species have been used and cultivated for medicinal material in orient, A. gigas in Korea, acutiloba in Japan and sinensis in China. A. gigas (Chamdangui) is different from A. acutiloba or A. sinensis in the contents chemical components and their efficacious. In Korea, in particular, A. acutiloba has been cultivated in a small acreage from several decades ago, and recently A. sinensis has been trying to cultivate. A trial of adaptation and cultivation of the three species was performed in different altitudinal regions such as Suwon (50 m of sea level), Jinbu (500 m of sea level) and Taebak (700 m of sea level). A. gigas and acutiloba grew and produced roots successfully at all locations, but A. sinensis could grow only at high altitudinal region, Taebaek. A. sinensis survived 70.3% at Taebaek, but only 45.2% at Jinbu and 3.6% at Suwon. The dry root yield of A. sinensis was as low as 1,600 kg/ha at Taebaek and 1,270 kg/ha at Jinbu comparing farmers' average root yield of A. gigas, 3,000 kg/ha however, no root could be harvested at Suwon. The results, showed it was that A. sinensis could not grow at low altitudinal plane area except high altitude area in Korea. Even though it could grow, the root yield was too low to support the income.

• The Korea Journal of Herbology
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• v.22 no.3
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• pp.39-45
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• 2007

Objectives : The purpose of this study is to investigate the delayed luminescence-biophoton emission from root of Angelica sinensis D., Angelica acutiloba K., and Angelica pubescens M. These three species of Genus Angelica are now imported from other nations into Republic of Korea. Methods : Randomly selected samples from roots of Angelica sinensis D., Angelica acutiloba K., and Angelica pubescens M. were radiated with 150 W metal halide lamp for 1 minute. After radiation. biophoton emissions of each sample were detected by electron multiplication(EM)-charge coupled device camera. The detected biophoton image was calculated with unit of counts per pixel. Results: The average biophoton emissions of delayed luminescence with EM ratio of $\times$150 and $\times$250 were distinguished significantly. The maximum biophoton emissions of delayed luminescence with EM ratio of $\times$250 were distinguished significantly. Conclusions : These results suggest that biophoton imaging of roots of Angelica sinensis D., Angelica acutiloba K., and Angelica pubescens M. could become the meaningful method for the study of differentiation for these three species of Genus Angelica.

• Journal of Applied Biological Chemistry
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• v.44 no.2
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• pp.77-83
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• 2001

For defining the possibilities of the commercial mass liquid culture of Cordyceps sinensis, the pharmacological activities of mycelia were analyzed. The mycelium of C. sinensis consists of carbohydrate (5.1%) and fat (1.3%), and contains a low content of protein (0.7%) and ash (0.5%), and 92.4% moisture. The molecular sugar ratio of carbohydrate was composed mainly of glucose, mannose (1.0 : 0.9), in addition a small amount of galactose and arabinose (0.2 : 0.1). The cellular materials of mycelia were fractionated into ethylacetate (EA), MeOH (M) and hot-water extract fraction (HW). HW fraction showed the most potent intestinal immune system modulating activity, anti-coagulant activity, and anti-complementary activity, and M fraction had the inhibition activity of radical generation as effective as genistine. These results reveal that the mycelium of liquid cultured C. sinensis showed pharmacological activities and could be used for commercial purpose.

• Journal of The Korean Society of Grassland and Forage Science
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• v.5 no.1
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• pp.1-7
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• 1985

The leaf anatomy, seasonal growth and regrowth of Miscanthus sinensis were studied at Wonju, 1984. The results are summarized as follows: 1. The leaf of M. sinensis showed typical Kranz anatomy. 2. Seasonal change of standing crop was rapidly increased from May to August and reached its peak in early October. The highest rate of net productivity was $510gdw/m^2$ in late July and the lowest was $80gdw/m^2$ in September. 3. The LAI was continuously broadened and reached its peak, 6.3 in July then decreased. The number of leaves per plant rapidly increased from April to July, and gradually decreased thereafter. 4. High cut of M. sinensis in late April has brought better regrowth than cut and that of in late May has no more regrowth.

• The Korean Journal of Ecology
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• v.21 no.5_1
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• pp.457.1-463
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• 1998

the research has been made for alkali and metal element concentrations in top soils and plants from the abandoned coal mine, Keumsan, Chungnam Province. Samples of the top soil and plant (Miscanthus sinensis and Pinus rigida) were collected from the mine area in which was divided into t재 regions the polluted region influenced by the coal mining and the non-polluted region. pH of the top soils was 3.16-4.33 in the polluted region. Ca, Sr and P concentrations were high in the polluted soils, and Al and Ba concentrations were high in the non-polluted soils. No differences were found in K, Na and Ti concentrations. M. sinensis was higher in the element concentrations than P. rigida. In the average concentration of the alkali and metal element, M. sinensis showed high Cs and Na in the polluted region, and high Ba, Ca, K, Sr and concentrations in the non-polluted region. P. rigida had high Cs, Na and Rb concentrations in the polluted region. M. sinensis and P. rigida were higher in the root than above-ground part in the most element, but Ca and K. Ca, K and Na concentrations within both plants had higher than those of soils.

• Journal of the Society of Cosmetic Scientists of Korea
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• v.36 no.3
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• pp.175-182
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• 2010

In this study, the antioxidative effects, inhibitory effects on tyrosinase of Cedrela sinensis extracts were investigated. The ethyl acetate fraction of extract ($3.54\;{\mu}g/mL$) and aglycone fraction of extract ($2.15\;{\mu}g/mL$) showed more excellent free radical (1,1-diphenyl-2-picrylhydrazyl, DPPH) scavenging activity ($FSC_{50}$) than the activity of (+)-$\alpha$-tocopherol ($8.98\;{\mu}g/mL$). Reactive oxygen species (ROS) scavenging activities ($OSC_{50}$) of Cedrela sinensis extracts on ROS generated in $Fe^{3+}$-EDTA/$H_2O_2$ system were investigated using the luminol-dependent chemiluminescence assay. The ethyl acetate fraction of extract ($0.15\;{\mu}g/mL$) and aglycone fraction of extract ($0.12\;{\mu}g/mL$) showed 10 times more excellent ROS scavenging activity than activity of L-ascorbic acid ($1.50\;{\mu}g/mL$). The protective effects of fractions of Cedrela sinensis on the rose-bengal sensitized photohemolysis of human erythrocytes were investigated. The ethyl acetate fraction of extract and aglycone fraction of extracts suppressed photohemolysis in a concentration dependent manner ($5{\sim}25\;{\mu}g/mL$). The inhibitory effect of Cedrela sinensis extracts on tyrosinase was investigated to assess their whitening efficacy. Inhibitory effects ($IC_{50}$) on tyrosinase were determined with ethyl acetate fraction of Cedrela sinensis extract ($48.00\;{\mu}g/mL$) and aglycone fraction of extract ($5.88\;{\mu}g/mL$). The aglycone fraction showed 40 times more remarkable tyrosinase inhibitory effect than whitening agent, arbutin ($226.88\;{\mu}g/mL$) These results indicate that fractions of Cedrela sinensis can be used as antioxidants in biological systems, particularly skin exposed to UV radiation by scavenging $^1O_2$ and other ROS, and protect cellular membranes against ROS. The fractions of Cedrela sinensis can be applicable to new functional cosmetics for antioxidant and whitening.

• Biomedical Science Letters
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• v.25 no.3
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• pp.288-292
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• 2019

In vitro antimicrobial activities of hot water extracts of Camellia sinensis (L.) O. Kuntze, for carbapenem-resistant Enterobacteriaceae (CRE) were compared to commonly used conventional antimicrobial agents. CRE was not only resistant to imipenem, meropenem or ertapenem, but also to various antimicrobial agents, such as amikacin (> $128{\mu}g/mL$). The hot water extracts of Camellia sinensis (L.) O. Kuntze had the lowest MIC ($0.06{\sim}0.5{\mu}L/mL$) of the carbapenem-resistant E. coli, K. pneumoniae, and Enterobacter spp. tested, and it was possible more potent than various conventional antimicrobial agents. Synergistic combinations of the extract with used commonly antimicrobial agents might even improve its antimicrobial chemotherapy property.

• The Korean Journal of Ecology
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• v.16 no.3
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• pp.329-339
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• 1993

Effects of relative light intensity and N, P fertilization on the growth and ramet dynamics of the rhizomatous plants, Arundinella hirta, Miscanthus sinensi and Spdiopogon sibiricus were studied in Chuncheon, Kangweon-Do. Ramets emerged in one pulse a year, withered in one pulse at the end of the growing season in M. sinensis and S. sibircus stands, while the birth and death pulse in A. hirta stands were two times. Total births of ramet were 9 times and 3.6 times greater in the unshaded fertilized stands of A. hirta and M. sinensis than in the shaded, However, those of S.sibiricus were 2.1 times greater in the shaded stands. Flowering rates of A. hirta, M.sinensis and S.sibiricus I the unshaded fertilized stands were 1.8, 2.7 and 1.04 times greater than in the shaded unfertilized stands, respectively. Height of ramets of A. hirta and M.sinensis were the hightest in the unshaded fertilized stands. However, that of s.sibiricus was the highest in the shaded fertilized stand. Aboveground production of A.hirta in the fertilized stand was 2.4 times greater in the unshaded stand than in the shaded one. Results of inflorescence frequency, shoot height and the ratio of aboveground to belowground were smiliar to the total births. The added fertilizer markedly increased the ramet density and the shoot productivity of three rhizomatous plants, especially of A. hirta.

• Journal of The Korean Society of Grassland and Forage Science
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• v.4 no.2
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• pp.127-132
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• 1983

An investigation was performed to reveal the relation between production and decomposition of the Miscanthus sinensis and Arundinella hirta grasslands in Mt. Kwanak. 1. The total annual litter productions of M. sinensis grassland A, B and A, hirta grassland were 2,267.12, 943.44 and 1,228.45 g/m$^{2}$, respectively. 2. The decay constants of litters of M. sinensis grassland A, B and A. hirta grassland were 0.732, 0.411 and 0.877. 3. The time required for the decomposition of half of the accumulated organic matter of M. sinensis A,B and 4. hirta were 0.9, 1.7 and 0.8 years, for 95% of elimination 4.1, 7.3 and 3.4 years, and for 99% of elimination 6.8, 12.2 and 5.7 years respectively. 4. The decomposition rate of grass litters was affected by the soil water content and grass species.