• Proceedings of the Plant Resources Society of Korea Conference
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• 2019.04a
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• pp.106-106
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• 2019

Human needs energy to maintain metabolisms, and these energy sources were uptake foods or nutritions. The most effective source was known for glucose among the nutrients, furthermore the glucose is an important source of energy for blood cells and control brain maintenences cells. But as food is plentiful and eating habits become more westernized, fast food and irregular meal times by works. Nowadays, diabetes were rapidly increased by malnutriton and obesity. Diabetes was the sixth highest on the list of causes of death in Korea, released by the Statistics Korea in 2015, which is considered a serious social problem for adult diseases. Therefore, this study aims to establish the optimal hot water extraction conditions of mixed herbs extract mixture compounds that are effective in diabetes. The independent factors were extraction temperature (X1: $40-120^{\circ}C$), extraction time (X2: 2-10 hrs.), and the ratio of water to sample (X3: 40-200 mg/mL). Their effects were assessed on dependent variables of the extract properties, which included soluble solid contents, Brix of sample extract, total polyphenols content, total flavonoids content and DPPH Radical scavenging activity. As a result, the content of total polyphenol content was the highest in No.12(6 hrs, $120^{\circ}C$, 67 mg/mL) and the highest total flavonoid contents was found in No.16(6 hrs, $80^{\circ}C$, 40 mg/mL). DPPH Radical scavenging activity showed the highest activity in No.7(8 hrs, $100^{\circ}C$, 100 mg/mL).

• Journal of Apiculture
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• v.33 no.4
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• pp.239-250
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• 2018

We investigated the pollination activity of honeybees (Apis mellifera L.) in terms of different climatic conditions in the greenhouse cultivation of watermelons (Citrullus lanatus L.) during winter. The aim of the study was to search a climatic condition which effectively can be use honeybees as pollinators during the flowering season of watermelons in winter or early spring. The average climatic conditions inside the greenhouse during the bee activity time (BAT)-between 10:00 and 16:00 in mid-Februarywere a temperature of $30.4^{\circ}C$, relative humidity of 53.7%, illuminance level of 22,728.4lx, and UV level of $0.233mW/cm^2$. Bee traffic and foraging activity were at their greatest at 10:00 and tended to decrease with time. Male watermelon flowers typically dehisced between 10:00 and 12:00. Climatic conditions were significantly correlated with bee activities, including bee traffic and foraging activity. Bee activities were positively correlated with temperature, illuminance level, and UV level but negatively correlated with relative humidity. Temperature had the greatest effect on honeybee behavior. Among the foraging honeybees, the number of high-flying bees that did not pollinate flowers showed a strong positive correlation with temperature, and the number of bees landing on the flowers showed a positive correlation with the UV level. The temperature range inside greenhouses at which the pollination activities of honeybees can be maintained efficiently during winter watermelon pollination was found to be $21{\sim}25^{\circ}C$.

• Journal of Sericultural and Entomological Science
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• v.52 no.2
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• pp.142-146
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• 2014

The purpose of this study was to determine the possibility of black soldier fly (Hermetia illucens) as a animal feedstuff. Insect resources have been widely recognized that it exhibits its own biological activity by whole body or its metabolic intermediates. To accomplish this, its general and biological activities were measured. The present study was conducted to compare antioxidant activity of black soldier fly larva, pupa and grasshopper by examining radical scavenging activity using DPPH (2,2 diphenyl 1-picryl hydrazyl). DPPH radical scavenging activity was conducted on the EtOH, MeOH, H2O fractions of black soldier fly larvae. Results showed that black soldier fly pupa on the H2O fraction contained the highest DPPH radical scavenging activity among the samples. FRAP assay are more suitable methods to evaluate antioxidant activity of black soldier fly extracts. Among the samples, the FRAP value showed higher antioxidant activity in the extracts from black soldier fly pupa extract on H2O fraction. These results suggest that black soldier fly larva and pupa extract has antioxidant activity and its fractions can be utilized to develop functional feedstuff.

• Asian-Australasian Journal of Animal Sciences
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• v.2 no.3
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• pp.204-205
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• 1989

• Magazine of the Korean Society of Agricultural Engineers
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• v.8 no.1
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• pp.1048-1054
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• 1966

1. Data of this article come from actual soil survey activity by the UNKUP project personel. 2. Proper national land use must be solved because of the growing population and increasing economic activity. 3. Korea has to be developed for the natural resources of soil and water in the subwate\ulcorner rsheds. 4. This problem. depends On the result of land capability classification which was determind by the soil survey.

• Proceedings of the Korean Society of Postharvest Science and Technology of Agricultural Products Conference
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• 2001.06a
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• pp.102-102
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• 2001

• Journal of Applied Biological Chemistry
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• v.44 no.3
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• pp.140-142
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• 2001

Quantitative gas chromatographic method for determining the ant repellent activity of cineol, ${\alpha}$-terpineol, linalool, and piperitone which usually found in Chinese Prickly Ash Zanthoxylum piperitum DC. was developed. These monoterpenes showed higher ant repellent activities than DEET due perhaps to their volatility. Gas chromatographic method quantified the volatility of the four monoterpenes and DEET.

• Proceedings of the Korean Society of Sericultural Science Conference
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• 2003.10a
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• pp.116-117
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• 2003

Aphidicidal activity of Bacillus thurigiensis crystal proteins was recently reported. However, relatively higher dose of crystal protein was needed to kill aphids. In this study, we intended to improve the aphidicidal activity of crystal protein by fusion with coat protein (CP) of potato leafroll virus (PLRV) which is transmitted by aphids. (omitted)

• Journal of Microbiology and Biotechnology
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• v.24 no.3
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• pp.354-358
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• 2014

A screening test showed that lycorine exhibited significant antifungal activity against 24 pathogenic crop fungi at concentrations of 500 ${\mu}g/ml$ and 100 ${\mu}g/ml$, respectively. Fusarium graminearum was selected for antifungal mechanism studies by observing its mycelial morphology and investigating the variations in its conductivity. In addition, the substance absorption and metabolism of F. graminearum were explored. The mechanism was revealed as being one by which lycorine destroyed the cellular membrane and further influenced substance absorption and cell metabolism.

• Horticultural Science & Technology
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• v.30 no.1
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• pp.6-12
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• 2012

Early growth, pigmentation, protein content, and phenylalanine ammonia-lyase (PAL) activity of red curly lettuces (Lactuca sativa L.) grown under different lighting conditions were investigated. Fluorescent lamps (control), blue, red, and blue plus red light-emitting diodes (LEDs) were used as light sources for 10 days. An equal proportion (1:1) of blue and red LEDs was used in the mixed radiation condition. Compared with the control, monochromic red or blue lighting increased fresh and dry weights of 'Ttuksum' and 'Jaju' lettuces. Anthocyanin synthesis was also significantly promoted by the mixed radiation of blue and red LEDs. The mixed radiation also increased the protein content and PAL enzyme activity of 'Ttuksum' leaves by about 200% compared to other treatments. Anthocyanin content was the highest in lettuces subjected to the mixture radiation of blue and red light treatment, while anthocyanin synthesis was inhibited by monochromic red light. The results of the present study indicate that growth and pigment synthesis in lettuces are significantly enhanced by exposure to mixed radiation from blue and red LEDs.