• Journal of the Korean Institute of Landscape Architecture
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• v.40 no.5
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• pp.1-7
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• 2012

The main purpose of this research is to evaluate the effect of light quality on the growth and physiological activities of Laurus nobilis plants growing indoors, the L. nobilis seedlings were grown under four types of lighting for 180 days. The seedlings were grown under 4 different treatments((n=9 seedlings per treatment): control, control supplemental UV-B irradiated(+UV), FR reduced(-FR) and simultaneously supplemental UV-B irradiated and FR reduced(+UV-FR)). It was found that UV-B irradiation(+UV) reduced dry weight and leaf area, and increased leaf thickness and the amount of UV-absorbing compounds per unit leaf area. In contrast, a reduction in far-red(FR) light did not affect any of these parameters. Interestingly, however, the elongation growth and net photosynthetic rate of the L. nobilis seedlings grown under simultaneous UV-B irradiation and FR reduction(+UV-FR) were significantly decreased than the control treatment. From these results, it is concluded that the light quality has a large effect on the indoor growth of L. nobilis. This study can suggest basic information for managed in the L. nobilis in indoor using light quality.

• Journal of the Korean Society of Food Science and Nutrition
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• v.34 no.4
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• pp.503-508
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• 2005

The chemical properties of olive and bay leaves were investigated and analyzed to provide basic data for food materialization and processing. The moisture contents of olive and bay leaves were $3.95\%$ and $8.50\%$, respectively. The contents of crude protein, crude fat, crude ash and carbohydrates of olive leaf were $11.04\%,\;7.45\%,\;5.05\%\;and\;76.46\%$, respectively. And the contents of same those components of bay leaf were $7.23\%,\;7.21\%,\;3.72\%\;and\;81.84\%$, respectively. Glutamic acid $(1086.8\;mg\%)$and aspartic acid $(918.8\;mg\%)$ in olive leaf were major amino acids, glutamic acid $(621.2\;mg\%)$ and leucine $(558.6\;mg\%)$ in bay leaf were the major amino acids. The major free sugar of olive leaf was sucrose $(1.55\%)$. Whereas major free sugar of bay leaf was glucose $(1.54\%)$. Palmitic acid $(olive\;33.0\%,\;bay\;17.8\%)$ and linolenic acid $(olive\;31.1\%,\;bay\;35.2\%)$ were major fatty acid in crude fat of both olive leaf and bay leaf. The Ca contents were the highest in olive leaf $(929.6\;mg\%)$and bay leaf $(836.2\;mg\%)$. Vitamin A contents of olive and bay leaves were 5.10 mg/100 g and 6.49 mg/100 g, respectively. Vitamin C contents of olive and bay leaves were 36.64 mg/100 g and 13.86 mg/100 g, respectively. But vitamin $B_6$ and $B_{12}$ were not detected.

• The Korean Publising Journal, Monthly
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• s.320
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• pp.26-26
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• 2002

• Proceedings of the Korean Society of Dyers and Finishers Conference
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• 2004.04a
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• pp.256-261
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• 2004

• Proceedings of the Korean Society of Food and Cookery Science Conference
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• 2004.10a
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• pp.118-118
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• 2004

• Korean Journal of Food Science and Technology
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• v.35 no.6
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• pp.1060-1063
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• 2003

Electron spin resonance (ESR) spectroscopy was used to investigate the effects of irradiation doses and storage times on three spices. Three imported spices (Brassica juncea, Origanum vulgare, Laurus nobilis) were irradiated with doss of 0, 1, 5 and 10 kGy using a Co-60 irradiator at room temperature. ESR signals were measured from each sample by a Bruker-EPR spectrometer. The gamma-irradiated Brassica and Laurus nobilis exhibited characteristic signals, which were different from those of the non-irradiated ones. Non-irradiated and irradiated Origanum vulgare exhibited single lines, with higher ESR signals in irradiated sample than in non-irradiated sample. The ESR signals increased linearly with increasing irradiation doses $(1{\sim}10kGy)$. A strong positive correlation coefficient $(R^2=0.9939{\sim}0.9993)$ was obtained between the irradiation doses and the corresponding ESR signal intensities. Although the ESR signal intensities decreased with storage time, signals from the three irradiated spices were observed even after 12 weeks of storage at room temperature.

• Journal of the Korean Society of Food Science and Nutrition
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• v.34 no.4
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• pp.544-548
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• 2005

The objective of this study was to determine the effect of die temperature and dimension on extraction pattern, extract yield, and crude saponin content of extruded white ginseng. The extrusion variables were die temperature $(110\;and\;120^{\circ}C)$ and die dimension (3 holes with 1.0 mm, 2 holes with 2.0 mm, and 1 hole with 3.0 mm diameter). The browness and redness were indicator of active components in ginseng extract. Both were used to evaluate the effect of die temperature and die dimension on release pattern and release rate constant. Browness and redness of extract achieved its lowest value at die temperature $110^{\circ}C$ and 2 holes with 2.0 mm diameter, indicating the lowest extraction rate constant. Extract yield highly increased by extrusion treatment. Extract yield and crude saponin content were the highest at die temperature $120^{\circ}C$ and 1 hole with 3.0 mm diameter. In conclusion, extrusion process has contributed significantly in improvement of release rate of its active components.

• Korean Journal of Plant Resources
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• v.31 no.5
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• pp.423-432
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• 2018

This study was performed to develop a new natural antimicrobial materials by analyzing the effect of extracts obtained from Ten Lauraceae Species on the inhibitory activity against Propionibacterium acnes. The plant materials were collected from Wando and Jeju islands, and the antimicrobial activity of the crude extracts was examined by the agar diffusion method with different part (i.e., leaf and branch), solvents (i.e., distilled water, 80% ethanol, and 100% methanol) and at different ultrasonic extracting times (i.e., 15, 30, and 45 minutes). The control agents used were synthetic antimicrobials, methylparaben and phenoxyethanol, at concentrations of 0.4, 1, 2, and 4 mg/disc. Altogether, extracts of 10 species used in the study showed inhibitory activity, which confirmed their antimicrobial action against acnes. Among these, leaves of Laurus nobilis L. which was extracted in 80% ethanol for 45 min showed the largest clear zone (19.8 mm). Leaves of L. nobilis L., showing highest antimicrobial activities among 10 species, were successively reextracted with n-hexane, chloroform, ethylacetate and n-butanol. As a results, in all fractions except butanol, clear zone above 10 mm were formed. The ethyl acetate fraction showed the highest inhibitory activity (13.3 mm) and the inhibitory activity was significantly higher than that of crude extract (10.2 mm) and phenoxyethanol as a control (12.5 mm).

• Journal of the Korean Institute of Landscape Architecture
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• v.48 no.6
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• pp.48-57
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• 2020

This study was aimed to determine the history of Son keechung laurel tree, which is designated and managed as Seoul Metropolitan Government Monument No. 5. Sohn keechung's victory in the marathon at the 1936 Berlin Olympics served as an opportunity to encourage great pride and national spirit for the Korean people's national spirit who had spent their painful days under Japanese colonial rule. The seedlings that Son keechung received at the time are currently growing at Son Keechung Sports Park on the hill in Manri-dong, west of Seoul Station, and are Quercus palustris. That variety of Tree is native to the United States. The 11th Berlin Olympics, held in 1936, is a golden opportunity for Hitler to show off the history and cultural excellence of the German race, so it does not make sense to award victors an American giant oak instead of the German oak tree. The Seoul Metropolitan Government and various media outlets made a fait accompli due to Hitler's simple mistake. However, this study revealed that the laurel that Son received was the Quercus robur, based on the articles of the Korean newspaper, the German daily newspaper, and the recently introduced article of Der Spiegel, a leading German weekly magazine. Based on these circumstances, I would like to suggest that the originally awarded Quercus robur be planted in Son keechung Memorial Park and that the newly discovered history be notified on the Seoul Metropolitan Government website and various records.

• Textile Coloration and Finishing
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• v.16 no.6
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• pp.1-9
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• 2004

The dyeings of cotton and silk fabric with Laurus tree extracts were investigated. The colorant was extracted with distilled water at $100^{\circ}C$ for lh. Dyeability(K/S), color fastness and antibacterial property of cotton and silk fabric were tested under conditions of various time, temperature, concentration, repeat-number of dyeing and mordants. The characteristics of dyeings Laurus extracts were figured out by K/S and CIELab values and color-fastness test was estimated in terms of wash fastness and light fastness. The maximum wavelength of spectrum was 670nm. The K/S value of cotton and silk fabric increased with increasing dyeing time and the exhaustion was saturated in 90min. Optical dyeing temperatures of cotton and silk fabrics were $60^{\circ}C$ and $80^{\circ}C$, respectively. The mordant effect on cotton fabric was achieved using Fe mordant. On the other hand, the mordant effect on silk fabric was obtained using Fe and Cu mordants. The wash fastness of cotton fabric was higher than that of silk fabric. Antibacterial property of silk dyeing was greater than that of cotton dyeing. In addition, the excellent antibacterial effect was imparted by Fe-post mordant method.