• 아시안잔디학회지
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• 제11권4호
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• pp.289-294
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• 1997

The cycles of heavy metals, mercury, lead and cadmium, were investigated on in dynamic grassland ecosystems at a steady state in Zoysia japonica and Miscanthus sinensis in Mt. Kwanak, Korea. Estimates of decay constants of heavy metals based on experimental and methomatical model, were Hg 0.14, Pb 0.17 and Cd 0.41 of Z. japonica grassland, and Hg 0.33, Pb 0.13 and Cd 0.56 of M sinensis grassland. The durations of reaching half of initial amounts in Z. japonica and M. sinensis grassland, were Hg 4.95, Pb 4.07 and Cd 1.69 years, and Hg 2.10, Pb 5.33 and Cd 1.24 years respectively. Times needed for 99% decomposed were longer in Z. japonica than M. sinensis grassland. Decay velocity of constituents of surface soil layers were more rapidly in M. sinensis than Z. japonica grassland. Key words: Cycles of heavy metals, Mercury, Lead, Cadmium, Zoysia japonica. Miscanthus sineusis, Mt. Kwanak, Decay constants.

• Journal of Species Research
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• 제11권3호
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• pp.202-207
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• 2022

Three species of Choreutidae, Choreutis atrosignata (Christoph, 1888), Choreutis japonica (Zeller, 1877), and Litobrenthia japonica (Issiki, 1930), are reported for the first time from Korea. The records of C. atrosignata and C. japonica are based on two females from Yeongwol, Gangwon Province and from the Island Chujado, Jeju Province, respectively. The latter species was obtained from two larvae collected on the leaves of Ficus erecta (Moraceae). Photographs and data of rearing the larvae are provided. The record of L. japonica was based on two specimens collected from the Islands, Bogildo and Wando, Jeollanam Province. The present data of L. japonica represent the first record of the subfamily Brenthiinae and the genus Litobrenthia from Korea. Distributions of two species C. japonica and L. japonica, previously known only from Japan, now extends to Korea. Habitus and genitalia of the species treated here are briefly described and illustrated, if possible. To sum up, the Korean Choreutidae comprises four genera and 10 species, nine in Choreutinae and one in Brenthiinae.

• 한국작물학회지
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• 제22권2호
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• pp.18-22
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• 1977

Germination ability of a japonica and 15 indica$\times$japonica varieties was tested at day/night tempuratures of 25/2$0^{\circ}C$ and 12/12$^{\circ}C$. Germination ability of a japonica variety, "Jinheung" and two indican$\times$japonica varieties. "Suweon ＃251" and "Suweon ＃278" was greater than that of other indica$\times$japonica varieties tested. Germination pattern of varieties was made into 4 groups.ieties was made into 4 groups.

• Natural Product Sciences
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• 제17권1호
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• pp.23-25
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• 2011

It has been shown that the butanol extract of Lonicera japonica has antimicrobial and other potentially useful biological activities. The purpose of this study was to determine the in vitro activity of Lonicera japonica compared to other antimicrobial agents against anaerobic bacteria. Specifically, the in vitro activity of the butanol extract was investigated against 104 clinical isolates of anaerobic bacteria using an agar dilution method and the results were compared to erythromycin, cefoxitin, imipenem, clindamycin, and metronidazole. It was found that Lonicera japonica and imipenem were the most active antimicrobial agents tested.

• 한국작물학회지
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• 제35권3호
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• pp.233-238
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• 1990

국내에서 수집된 잡초형 벼 7계통을 Japonica, Javanica 및 Indica 검정종으로 교잡하여 잡종(F$_1$)의 종자임성을 가지고 그들의 재배종과의 친화성을 검토하였다. 그 결과를 요약하면 다음과 같다. 1. 검정종으로 사용된 Japonica, Javanica 및 Indica에 속하는 품종군간의 잡종임성은 각 생태형간의 전형적인 관계를 나타내는 조합도 있었지만 생태형내에서의 분화를 인정할 수 있는 조합도 있었다. 수원조, M. Sinaguing 및 wx817 품종간 조합은 각각 Japonica, Javanica, Indica형간 조합의 곡형적인 것이고 기타 품종들의 조합에서는 각 생태형군내의 분화를 인정할 수 있는 것들이었다. 2. 공시 잡초형 계통들과 검정종들과의 잡종임성은 Japonica와는 반불임내지 완전임성에 가까운 변이를 보였지만 Javanica나 Indica와는 심한 불임을 나타내어 잡초형 계통들이 Japonica에 근록인 것 같이 나타났다. Japonica와의 조합에서 반불임을 보인 출청액미 B나 삼산면 8은 Javanica나 Indica 검정종과의 조합에서 심한 불임을 나타내어 이들이 Indica나 Javanica와 근록인 것 같지는 않았다. 3. 잡초형계통 상호간의 잡종임성은 조합별로는 최저 69%, 최고 96%로 계통평균으로는 75%에서 92%에 달하여 비교적 높은 편이었다. Japonica 검정종과의 잡종에서 반불임을 보였던 2계통은 잡초형계통 상호간 조합평균임성이 1, 2위로 높았다. 4. 잡초형계통들의 Amylose함량, A.D.V.phenol 반응 및 립형은 매우 다양하며, Japonica 검정종과의 잡종친화성도 다양하지만 Javanica나 Indica보다는 Japonica에 유록이 더 가깝지만 Indica 혈통의 영향도 부정할 수 없을 것 같다.

• 한국동물위생학회지
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• 제32권4호
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• pp.353-359
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• 2009

Interest in marine organisms as potential sources of bioactive agents has increased in recent years. The red seaweed, Callophyllis (C.) japonica, is abundant in the coastal regions of Jeju Island in South Korea. A previous study shows that C. japonica extracts have antioxidant activity and radioprotective effects. In this study, an methanol extract of C. japonica was tested whether it has antibacterial effects against the bacteria from swine. In vitro antibacterial activities of the crude extracts prepared from the C. japonica using 80 % methanol were tested for inhibitory activity against the Escherichia (E.) coli (S175), Enterococcus (E.) faecium (ATCC 51558), Salmonella (S.) Typhimurium and Staphylo-coccus (S.) aureus (ATCC 25923) by using broth dilution method. All organisms were incubated in brain heart infusion medium containing 1% extract at 0, 4, 8, 12 and 24 hrs. The 3 days-old piglets were fed an experimental diet supplemented with 1% C. japonica for 1 week. And the change of the coliform bacteria in feces were examined after supplement of C. japonica for 1 week. When the inocula containing $10^2{\sim}10^3$CFU/ml of each organism were used the extracts of C. japonica showed various degrees of antibacterial effects on all bacteria tested. The CFU value ($6.3\times10^8$CFU/ml) of C. japonica for E. coli was decreased 30% compared with vehicle controls ($9.0\times10^8$CFU/ml) after 8 hrs incubation. The proliferation rate of E. faecium was inhibited about 68% at 4 hrs, 81% at 8 hrs and 76% at 12 hrs after incubation, respectively. The proliferation rate of S. Typhimurium was inhibited about 96% at 4 hrs, 90% at 8 hrs and 72% at 12 hrs after incubation with extracts of C. japonica. The proliferation rate of S. aureus was inhibited more than 90% each time courses. Conclusively, a red seaweed extract of C. japonica was found to be effective against a number of gram negative and gram positive bacteria such as E. coli, E. faecium, S. Typhimurium, and S. aureus. The number of coliform bacteria was increased in the 1% C. japonica-treated group, as compared to those of controls. This result suggests that C. japonica extracts be added as an effective natural antibacterial agent. The precise mechanism of antibacterial effects and its application on swine industry remains to be further studied.

• 한국식품영양학회지
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• 제21권1호
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• pp.22-27
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• 2008

This study investigated the quality characteristics of the Seolgiddeok samples prepared with various amounts(0, 0.5, 1.0 and 2.0%) of Paecilomyces japonica powder by examining proximate compositions, color, texture and sensory quality. The composition of the Paecilomyces japonica powder was measured as follows: moisture(7.40%), crude protein(55.77%), crude lipid(7.1l%), and crude ash(5.39%). With increasing Paecilomyces japonica powder content, the moisture and crude protein content of the Seolgiddeok increased; however crude fat and ash contents decreased. In terms of color, the lightness of the Seolgiddeok decreased and yellowness and redness increased with increasing amounts of Paecilomyces japonica powder. Among textural characteristices hardness, cohesiveness, and gumminess were decreased, but springiness increased according to the addition level of Paecilomyces japonica powder. For the sensory evaluation, the overall quality of the SP-l.0% group was not significantly different than the control group(SP group). In conclusion, the optimal addition amount of Paecilomyces japonica powder for Seolgiddeok is proposed as 1% of total weight.

• 생약학회지
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• 제35권4호통권139호
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• pp.380-383
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• 2004

The purpose of this study was to evaluate mushroom Tyrosinase inhibitory activity of Cuscuta japonica Choisy and C. australis R.Be. The experimental materials were expressed juice from their stems and flowers, both water and ethanol extracts, their seeds, and two kinds of commercially available cosmetic packing Wontosa and Bupjetosa (made from seeds of C. japonica). The 50% inhibitory concentration $(IC_{50})$ of C. Japonica juice was 5.4 mg/ml. However, C. australis juice showed negligible mushroom tyrosinase inhibitory activity. The $IC_{50}$ of water extracted C. japonica seed was $54.0\;{\mu}g/ml$, water extracted product of Wontosa $50.0\;{\mu}g/ml$ and Bupjetosa $40\;{\mu}g/ml$. The $IC_{50}$ of ethanol extracted C. japonica seed was $10\;{\mu}g/ml$, Wontosa $10\;{\mu}g/ml$ and Bupjetosa $20\;{\mu}g/ml$.

• 대한한방내과학회지
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• 제26권3호
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• pp.543-550
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• 2005

This study was designed to identify the effects of Reynoutria Japonica on antibacterial activity aganist Bordetella pertussis ATCC 9797 which is cause of whooping cough. The ethanol- and water-extracts of more than 80 oriental herbal medicine were Investigated by Kirby -Bauer method to determine their inhibitory effects on growth of B. pertussis ATCC 9797 in vitro. For that Reynoutria Japonica was selected. The ethanol-soluble extract of Reynoutria Japonica showed relatively high antivacterial activity against B. pertussis ATCC 9797. However, the water-soluble extract of Reynoutria Japonica showed no antibacterial activity. The ethanolic extract was further fractionated with organic solvents such as hexane, chloroform, and ethyl acetate, in that order. Among the fraction tested, the chloroform fraction showed the highest antibacterial activity when the ethanol-soluble extract of Reynoutria Japonica minial inhibitory concentration(MIC) was $25{\mu}g/m{\ell}l$. Results support a role far Reynoutria Japonica in inhibiting the cell growth of B. pertussis ATCC 9797, but further experimentation is required.

• ALGAE
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• 제21권3호
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• pp.287-294
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• 2006

Neosiphonia japonica is a rhodomelacean red alga that occurs in Korea, Japan, China, far-east Russia, northwest America, and New Zealand. Although it is distinguished by a bush-like habit having four pericental cells with cortication and numerous branches on axes, the taxonomy of N. japonica is still problematic. To investigate the taxonomy and phylogeny of the species, we analyzed rbcL and phycoerythrin (cpeA/B) genes from 19 samples of N. japonica and putative relatives. Phylogenetic trees from both genes show that N. japonica from Korea, Japan, New Zealand, and USA is clearly separated from N. decumbens, N. harlandii, and N. flavimarina from the Pacific Ocean. Instead, N. harveyi from the Atlantic Ocean was more related to N. flavimarina than to N. japonica. This result supports morphological and distributional differences between N. japonica and N. harveyi. However, the close relationship between these species suggests that they might have a recent most common ancestor. This is the second report to use the cpeA/B gene for evaluating species diversity in the Rhodophytes.