• Archives of Plastic Surgery
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• v.42 no.6
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• pp.788-788
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• 2015

• Proceedings of the Korean Society of Applied Entomolohy Conference
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• 2000.05a
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• pp.67-67
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• 2000

• Proceedings of the Korean Society of Life Science Conference
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• 2001.02a
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• pp.75-75
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• 2001

• Korean Journal of Medicinal Crop Science
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• v.3 no.2
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• pp.77-80
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• 1995

This study was carried out to know the effect of air temperature on photosynthesis and growth of Korean Valerian (valeriana fauriei var. dasycarpa HARA). The results are as follows; 1. Photosynthesis of V fauriei had highly significant relation to temperature in a quadratic regression mo­del, from which the optimum temperature for the plant growth were estimated to be $17.7^{\circ}C$. During the day­time in the field condition, the photosynthesis rate was highest at 9 a.m, then reduced to minimum at 2 p.m., and increased again thereafter. 2. Number of stomata was about $25/mm^2$ on the upper side and $85/mm^2$ on the lower side of the leaf, and the size was $21{\sim}30/{\mu}m$ in diameter. 3. A highly significant quadratic regression was noted between temperature and leaf width or root weight of V. fauriei. It was estimated from the regression equation that the optimum temperature for root growth was $20.3^{\circ}C$.

• The Korean Journal of Food And Nutrition
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• v.28 no.4
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• pp.533-543
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• 2015

This study investigated the chemical composition of Artemisia princeps var. orientalis (Pampan) Hara (ssuk in Korea) essential oil and the quantitative changes of major terpene compounds according to the time of harvest. The essential oils obtained by hydrodistillation extraction from the aerial parts of ssuk were analyzed by GC and GC-MS. The essential oil composition of ssuk was characterized by higher contents of mono- and sesqui- terpene compounds. Ninety-nine volatile flavor compounds were identified in the essential oil from ssuk harvested in 2010, with camphor (11.9%), ${\beta}-caryophyllene$ (9.11%), dehydrocarveol (8.51%), and borneol (7.72%) being the most abundant compounds. Eighty-three compounds were identified in the essential oil from the plant harvested in 2011, with borneol (12.36%), caryophyllene oxide (12.29%), ${\beta}-caryophyllene$ (10.24%), camphor (9.13%), and thujone (8.4%) being the most abundant compounds. Eighty-four compounds were identified in the essential oil from the plant harvested in 2012, with ${\beta}-caryophyllene$ (20.25%), caryophyllene oxide (14.63%), and thujone (11.55%) being the major compounds. Eighty-nine compounds were identified in the essential oil from the plant harvested in 2013, with thujone (23.11%), alloaromadendrene oxide (12.3%), and ${\beta}-caryophyllene$ (11.48%) being the most abundant compounds. Thujone and aromadendrene oxide contents increased significantly from 2010 to 2013, while camphor and dehydrocarveol contents decreased significantly during those 4 years. The quantitative changes in these 4 compounds according to the time of harvest can served as a quality index for ssuk essential oil. The ecological responses to recent climate changes may be reflected in the chemical components of natural plant essential oils.

• Korean Journal of Plant Resources
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• v.31 no.6
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• pp.591-596
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• 2018

This study was conducted to develop gibberellin treatment technique to enhance flower initiation in Aquilegia japonica Nakai & H. Hara. Seedlings were planted in 12cm-diameter pots on October 2016 and grown in green house. Ambient temperature in the green house was set at minimum $15^{\circ}C$ during day and night to suppress flower initiation at cold temperature condition. Two different types of gibberellin, $GA_3$ and $GA_{4+7}$, at 4 different concentration levels 100, 200, 400 and 600 mg/L, were tested in this study. Gibberellin was sprayed first at planting and secondly at 1-week after planting. Ten to fifteen ml of gibberellin was sprayed for each pot. Plant height and petiole length were elongated by both gibberellin types, flowering was more enhanced by $GA_3$ (91.7~100%) compared to of $GA_{4+7}$. However, abnormal flower was less observed in $GA_3$ treatment (0~16.7%) than $GA_{4+7}$. Number of flower stalks per plant ranged from 1.9 to 2.5. Number of flowers per plant ranged from 6.8 to 10.3. Differences in flowering characteristics between treatments were statistically significant. Optimal gibberellin treatment to enhance flower initiation in A. japonica Nakai & H. Hara substituting cold treatment was $GA_3$ at the concentration between 400 mg/L to 600 mg/L.

• Journal of the Korean Society of Food Science and Nutrition
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• v.40 no.1
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• pp.47-55
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• 2011

The solvent extracts of Aruncus dioicus var. kamtschaticus Hara, which were extracted by using several solvents with different polarities, were performed to investigate the antioxidant activities, whitening effect and antimicrobial activity. The content of total polyphenol of fractions from Aruncus dioicus var. kamtschaticus Hara extract showed the highest value ($335.88{\pm}2.26$ mg/g GAE) on ethyl acetate fraction. The ethyl acetate and n-butanol fractions were 0.06 mg/mL and 0.25 mg/mL as $IC_{50}$ values on DPPH radical scavenging, and $99.16{\pm}0.09%$ and $89.29{\pm}0.64%$ on ABTS radical scavenging activity, respectively. Also, reducing power and FRAP value were significantly higher on ethyl acetate fraction. The SOD like activity showed $80.76{\pm}0.61%$ on ethyl acetate and $72.34{\pm}0.79%$ on n-butanol. Tyrosinase inhibition activities (at 5 mg/mL) were $59.08{\pm}0.98%$ on ethyl acetate fraction. The chloroform fraction showed the strongest antimicrobial activities against B. cereus (14 mm), B. subtilis (12.5 mm), S. aureus (10.8 mm), E. coli (20.7 mm) at 0.1 mg/disc and the inhibition zone diameter of ethyl acetate fraction was 17.2 mm against E. coli at 0.5 mg/disc. The minimum inhibitory concentrations (MIC) of chloroform fraction against B. cereus and E. coli were 50 and $25{\mu}g$/mL, respectively. From these results, it is suggested that ethyl acetate and n-butanol fractions of Aruncus dioicus var. kamtschaticus Hara could be used as functional material for food additive ingredient and chloroform fraction could be suitable for the development of a food preservative.

• Journal of Bio-Environment Control
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• v.28 no.4
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• pp.404-410
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• 2019

This study was performed to investigate the seed morphological characteristics and dormancy type of Adenophora triphylla var. japonica Hara that high valued medicinal crop and to select the disinfectants and light quality for germination rate improvement. The seed disinfection was carried out using distilled water (control), NaClO 4%, $H_2O_2$ 4%, and benomyl $500mg{\cdot}L^{-1}$. The light quality treatments were set to dark condition (control I), fluorescent lamp (control II), LEDs [red, blue, green, and combined RB LEDs (red:blue = 8:2, 6:4, 4:6, 2:8)] with a photoperiod of 12/12 (light/dark) and light intensity $150{\pm}10{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$ photosynthetic photon flux density. Although the Adenophora triphylla var. japonica Hara seed was an underdeveloped embryo (E) and seed (S) with an embryo (E):seed (S) ratio of 0.4, it is germinated within 30 days, and seed moisture saturation was reached within 6 hours after immersion. After seed disinfection, the mold incidence rate was significantly inhibited, and the final germination rate was the highest at 87% in the benomyl seed disinfection. The final germination rate was the highest at 92% in the red light, and the mean daily germination was the lowest in the R2B8. Therefore, there is almost no dormancy in the Adenophora triphylla var. japonica Hara seed, and benomyl seed disinfectant and red light were effective in the improvement of germination rate. So it is considered to the high value of use for medicinal crop Adenophora triphylla var. japonica Hara cultivation.

• Journal of radiological science and technology
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• v.7 no.1
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• pp.99-106
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• 1984

• 제어로봇시스템학회:학술대회논문집
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• 1990.10b
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• pp.868-871
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• 1990

We derive an intelgral-type constraint on the complementary sensitivity function in digital control systems. Some design guidances are proposed for the pole assignment of digital controller with computation-time delay to improve the complementary sensitivity characteristics.