• Korean Journal of Food Science and Technology
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• v.37 no.1
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• pp.113-121
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• 2005

Antimicrobial effects of Camellia japonica L. were determined against Escherichia coli, Salmonella typhimurium, Staphylococcus aureus, and Listeria monocytogenes using paper disc method, and minimum inhibitory concentrations (MICs) were measured. Methanol extract (MEex), water fraction (WAfr), and butanol fraction(BUfr) showed antimicrobial effects against all tested microorganisms, with MEex showing strong antimicrobial effect against S. aureus and L. monocytogenes, and WAfr, Bufr, and ethylacetate fraction (EAfr)against S. aureus. No effects were observed in n-hexane fraction (HEfr) and chloroform fraction (CHfr) against all tested microorganisms. All species grown in the medium adding fractions of Camellia Japonica L. leaves extact were inhibited from WAfr and BUfr, repectively.(meaning not clear) MEex showed over 25% inhibitory effect against all tested microorganisms. BUfr showed over 50% inhibitory effect against all microorganisms except L. monocytogenes. EAfr and WAfr showed over 30% effect against S. aureus and L. monocytogenes. MICs of MEex against S. typhimurium and BUfr against S. aureus were 625 g/mL, indicating C. japonica L. extract can exert antimicrobial activity even at low concentration.

• Archives of Pharmacal Research
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• v.21 no.3
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• pp.348-352
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• 1998

Different bacteria wwere seperated from saliva and teeth of cariogenic patients and identified by a variety of morphological and biochemical tests. Extracts of green tea strongly inhibited Escherichia coli, Streptococcus salivarius and Streptococcus mutans. The antibacterial effect of green and black tea extracts were compared with those of amoxicillin, cephradine and eugenol.

• Proceedings of the Korea Contents Association Conference
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• 2013.05a
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• pp.135-136
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• 2013

본 연구에서는 고전시문, 민요, 시, 노래, 민속 및 신앙 등에 관한 문헌자료들의 해석을 통하여 동백나무가 우리 민족에 가지는 상징성을 고찰하였다. 연구결과, 동백나무는 청렴과 고고함, 애절한 사랑, 봄을 맞이하는 연인들의 설레임 등을 상징하며 다양한 기능성 및 신앙의 대상이 되기도 하는 등 우리 민족의 삶과 밀접한 관계성을 지닌 것으로 판단된다.

• The Korean Journal of Ecology
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• v.15 no.1
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• pp.81-102
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• 1992

The forest of kadok islet was investigated from aug. 1 1990 through oct. 30, 1990. The results obtained are summarized as follow : a floristic community. Most of the investigated area is occupied by arable land and pinus thunbergii forest, quercus serrata forest with only small area of camellia japonica forest of the eastern units. pinus thunbergii community subunit : eurya japonica rhododendron mucronulatum var. ciliatum elaeagnus umbellata typical quercus serrata community subunit : stephanandra incisa rhus chinensis typical quercus autissima community camellia japonica community zelkova serrata-acer mono community carpinus coreana community

• The Korea Beekeeping Bulletin
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• s.338
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• pp.58-59
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• 2008

• The Korea Beekeeping Bulletin
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• s.339
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• pp.53-55
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• 2009

• Korean Journal of Medicinal Crop Science
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• v.13 no.3
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• pp.105-108
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• 2005

Culture conditions for plant regeneration of Camellia japonica were achieved by organogenesis in explants of cotyledon. Seed cotyledons were cultured on MS medium containing various auxin, 2,4-D or NAA and cytokinins BA. The adventitious shoot buds were efficiently formed without embryogenesis on the basal region of cotyledon cultured on MS medium supplemented with $0.1\;{\mu}g/m{\ell}$ 2.4-D and $1\;{\mu}g/m{\ell}$ BA. Seed cotyledons could be used as a source of explants in experiments of genetic transformation of the genotypes evaluated for improving the efficiency of production of transgenic Camellia plants.

• Journal of Digital Convergence
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• v.13 no.7
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• pp.431-436
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• 2015

To determine fusion-complex activity of Camellia extract extracted hot water, this study was conducted. Special catechin was identified at this extract by analysis of catechin. In analysis of antioxidant activity, the extract was contained antioxidant material and flower among the other parts showed high antioxidant activity. flavonoid showed most high content of Camellia. Flavonoid content was found to be $223.29{\pm}0.005mg/g$ to measured most high to stem, a control group was measured Green tea new leaves $126.14{\pm}0.005mg/g$. Total polyphenol content exhibited most high content at new leaves and flavonoid showed most high content at stem. ${\gamma}$-Amino butyric acid (GAVA) among the free amino acid showed highly at all parts.

• Journal of the Korean Society of Food Culture
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• v.25 no.6
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• pp.788-794
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• 2010

Camellia sinensis L. (green tea) seed oils were prepared by roasting at $213^{\circ}C$ and pressing (RP), pressing (P), and nhexane extraction (H). The physico-chemical properties of the RP, P, and H samples, including fatty acid composition, color, and sensory characteristics were analyzed. RP, P and H samples were thermally oxidized at $180^{\circ}C$, and oxidative stability was determined by DPPH, CDA, and p-AV at 0, 20, 40, 60, and 80 min. Compared to the P and H samples, RP resulted in significantly higher thermal oxidative stability according to the DPPH, CDA, and p-AV results (p<0.05). The ratio of unsaturated fatty acids to saturated fatty acids among RP, P, and H samples were significantly different (p<0.05). The oleic acid and linoleic acid contents in green tea seed oils were 58 and 23%, respectively. Hunter's color value of lightness (L) for the RP, P, and H samples was not significant. Redness (a) of RP was $3.47{\pm}0.119$ and yellowness (b) of H was $60.10{\pm}2.483$, which were significantly different. Compared to RP samples, H and P samples had the highest color and off-odor values in the sensory evaluation. RP samples showed the highest taste value and were significant overall (p<0.05). The thermal stability of RP extraction was more stable than any other method. Camellia sinensis L. seed oil extracted by RP had better sensory characteristics than other edible oils, including soybean oil, grape seed oil, and extra virgin olive oil.

• Korean Journal of Environment and Ecology
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• v.27 no.2
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• pp.241-252
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• 2013

This study investigated plant community structure of Dongbaekdongsan(Mt.) in Jeju-do to identify character as evergreen broad-leaved forest. 20 plots(size is $20m{\times}20m$) were set up and plant communities were divided into 5 communities of Quercus glauca-Castanopsis cuspidata var. sievoldii-Ilex integra(Camellia japonica), Quercus glauca-Castanopsis cuspidata var. sievoldii-Camellia japonica, Quercus glauca-Camellia japonica, Quercus glauca-Camellia japonica-Pinus thunbergii and Pinus thunbergii-Quercus glauca by using TWINSPAN, DCA ordination, mean importance value and environmental condition. Area of Evergreen broad-leaved forest with stonny ground is covered with Quercus glauca and Castanopsis cuspidata var. sievoldii in canopy layer and Camellia japonica in the subordinate layer. Area of remaining soil's depth is covered with Pinus thunbergii. It has been alleged that Pinus thunbergii planted by human when Dongbaekdongsan(Mt.) is not selected local monuments. All of communities is predicted success to community of Quercus glauca-Camellia japonica. Shannon's diversity ranged from 1.0268 to 1.0717 in area of Evergreen broad-leaved forest and 1.2102 in area of Pinus thunbergii. 10 species of broad-leaved tree's constancy ratio is over the 80%. In future, Castanopsis cuspidata var. sievoldii and Cinnamomum japonicum can cover canopy layer, but it has low importance value. Specially high aged Camellia japonica is appeared everywhere. It has been alleged that it was touched by divinity since past. Dongbaekdongsan(Mt.) has different plant structure with another evergreen broad-leaved forest. It is hard that knowing its successional sere because it was damaged when it isn't degignate local monument. Accordingly continuous monitoring was required, successional direction and community's character is identified after forest become steady.