• 농업과학연구
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• 제46권3호
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• pp.569-577
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• 2019

The current experiment was conducted to compare nutrient utilization in the aged laying hens with different eggshell strengths or different intensities of brown eggshell color. Two metabolic trials with 96-week-old Hy-Line Brown laying hens were conducted. Twelve hens with a strong eggshell strength (SES) and 12 hens with a weak eggshell strength (WES) were selected and used in the first experiment, whereas 12 hens with dark brown eggshells (DBE) and 12 hens with light brown eggshells (LBE) were selected and used in the second experiment. All hens were fed a common commercial layer diet. Diets included chromic oxide as an indigestible marker to determine the apparent total tract retention (ATTR) of the gross energy (GE), dry matter, acid-hydrolyzed ether extract, nitrogen, neutral detergent fiber, acid detergent fiber, ash, and minerals. The results indicate that the ATTR of Ca in the aged laying hens with SES (59.7%) was greater (p < 0.05) than in the aged laying hens with WES (48.6%). However, the ATTR of the GE and other nutrients was not different between the hens with SES or WES. There were no differences in the ATTR of GE and nutrients between the hens with DBE or LBE. In conclusion, aged laying hens with SES have a greater ability to utilize dietary Ca than those with WES, indicating that the extent of dietary Ca utilization determines the eggshell strength of aged laying hens. However, nutrient utilization in diets may have little impact on eggshell brown coloration in aged laying hens.

• 한국염색가공학회지
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• 제20권6호
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• pp.42-50
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• 2008

The objective of this study is to investigate the efficacy of pomegranate hull colorant as a natural hair coloring dye. The extract of pomegranate hull was concentrated and freeze-dried to get colorant powder. Effect of dyeing condition and mordanting on the dye uptake of hair by using Al, Fe, Cu, Cr, Sn compounds, color change and colorfastness were explored. In addition, tensile strength was measured and the surface of the hair was observed. Dye uptake of hair measured by K/S value (400 nm) indicated that ionic bonding seems to be involved in the sorption of pomegranate colorant to hair. Maximum sorption was obtained at pH 3.5 and the concentration of 50% (on the weight of hair, o.w.h.). Acidic dyeing condition (pH $3.5{\sim}5.0$) showed yellow color however alkaline dyeing condition (pH $7{\sim}11$) gave reddish yellow color. Pomegranate hull colorant produced greyish brown color on hair and the hair mordanted with Fe showed dark brown color. Mordants except Fe did not increase dye uptake significantly. Mordants except Cu increased light fastness and mordants except Cr increased washing fastness level slightly. According to SEM observation and the tensile strength retention measurement, the mordant dyed hair gave more damage to hair by ultraviolet light and washing than the hair dyed without mordanting. Experimental results of K/S value and colorfastness(light and washing) supported that pomegranate hull colorant without mordanting can be used as a semi-permanent natural hair coloring dye.

• 식물병연구
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• 제12권3호
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• pp.164-167
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• 2006

배 생육기 발생되는 과피얼룩과의 발생 요인 및 방지 기술을 확립하기 위해 3년 간 시험한 결과를 요약하면 다음과 같다. 배 과피에 발생되는 과피얼룩 발생시기는 유과기부터 수확기에 발생하며, 발생 초기 부정형의 검은색 반점이 생기고 발생 후 시간이 경과되면서 갈색으로 되었다. 봉지 종류에 따른 과피얼룩과 발생 정도는 광 투과량이 적고 속 봉지의 투기성 및 투수성이 불량할수록 발생이 많았으며, 과실 부위별 발생 정도는 과실 적도를 중심으로 상부보다 하부쪽 발생이 현저히 많았다. 강우가 많거나 재배적으로 수관 내 가지 밀도가 많아 채광, 통풍이 불량한 과원에서 발생이 많았다. 약제방제는 수관 약제 살포보다 동계 약제인 석회유황합제 살포+잡초제거에 의해 과수원 내 병원균의 밀도를 감소시키는 것이 효과적이었다.

• 한국미생물학회:학술대회논문집
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• 한국미생물학회 2008년도 International Meeting of the Microbiological Society of Korea
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• pp.165-165
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• 2008

• 한국자원식물학회지
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• 제21권1호
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• pp.103-109
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• 2008

Nelumbo nucifera root(NNR) is used to clear summerheat(暑熱), bear Yang(陽) upwards and stop bleeding as mentioned in traditional Korean medicine. Also, it has been known that NNR is effective for lowering blood pressure and hyperlipidemia. The rhizome is considered to be nutritive, demulcent, diuretic and cholagogue and is used to treat piles, dyspepsia and diarrhea. An increasingly growing market for nutraceuticals and functional foods has triggered the study on natural sources for nutraceuticals, health foods and functional foods. But rhizome was inconvenient to formulate liquid dosage form(extract) by way of hot water because of its limited storage. Also the majority of the consumers have a complaint against the dosage. The purpose of this study was to develop the functional materials from NNR without side effects. We formulated the solid dosage form viz tablet and granule from the lotus root. Sensory evaluation was performed in terms of smell, taste, color and overall of lotus root and all colored forms(brown, dark brown, light green and yellow) of tablet and granule to evaluate the acceptability of the formulated tablets and granules. In sensory evaluation, among the formulated tablets and granules, light green granules obtained best score overall and yellow tablets showed the overall improved acceptability. In conclusion, lotus rhizome could be recommended as functional food. Further studies to clarify bioactive functions of Nelumbo nucifera in experimental animal model on atopic dermatitis are in progress.

• Fisheries and Aquatic Sciences
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• 제15권2호
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• pp.163-168
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• 2012

The non-utilized biomass of the aquacultured seaweed Undaria pinnatifida, particularly the rhizoid, is an alternative source of arachidonic acid (AA). Of the five aquacultured kelps that were tested, U. pinnatifida yielded the highest amount of AA, which was isolated from the rhizoids. Its identity (C20:4 n-6) was confirmed from gas chromatography-mass spectrometry spectral data. The optimal conditions for post-harvest storage or pretreatment of the rhizoids in Provasoli's enriched seawater for AA extraction were determined to be pH 7.8, 2% $CO_2$-enriched air, 20 ${\mu}mol\;m^{-2}\;s^{-1}$ light, and $10^{\circ}C$. Under these conditions, the AA content after 1 day of storage was enhanced by up to 127%. In the absence of light under ambient aeration, the AA content after 1 day of storage diminished to 90%. Rhizoids collected late in the season (April and May) contained the highest amounts of AA (approximately 2.5 mg/g tissue).

• Mycobiology
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• 제38권2호
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• pp.133-136
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• 2010

Stromatal fruiting bodies of Cordyceps cardinalis were successfully produced in cereals. Brown rice, German millet and standard millet produced the longest-length of stromata, followed by Chinese pearl barley, Indian millet, black rice and standard barley. Oatmeal produced the shortest-length of fruiting bodies. Supplementation of pupa and larva to the grains resulted in a slightly enhanced production of fruiting bodies; pupa showing better production than larva. 50~60 g of brown rice and 10~20 g of pupa mixed with 50~60 mL of water in 1,000 mL polypropylene (PP) bottle was found to be optimum for fruiting body production. Liquid inoculation of 15~20 mL per PP bottle produced best fruiting bodies. The optimal temperature for the formation of fruiting bodies was $25^{\circ}C$, under conditions of continuous light. Few fruiting bodies were produced under the condition of complete darkness, and the fresh weight was considerable low, compared to that of light condition.

• 한국환경농학회지
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• 제28권4호
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• pp.468-471
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• 2009

This study was conducted to determine the phototactic response of Paratlanticus ussuriensis to different wavelength of light by the use of LEDs and to provide a basic information for developing an improved trap with the longer trapping efficiency to control environment-friendly this katydid. P. ussuriensis were attracted to the single LED light source, especially, blue and white. For the multiple LED light sources, the movement of P. ussuriensis was not significantly different among LED-light bands. Overall, P. ussuriensis had a tendency to move to light source although they were not attracted to a specific wavelength of light. These methods may be used as information for conducting a phototactic response of other insects.

• 한국균학회지
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• 제30권1호
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• pp.11-17
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• 2002

공시균주인 EFCC C-251, EFCC C-252, EFCC C-1092 균주 중 현미(60 g)와 누에 번데기(30 g)를 혼합한 배지에서 EFCC C-252 균주가 자실체가 잘 형성되어 이 균주를 가지고 본 연구를 수행하였다. 자실체 형성 최적온도는 $25^{\circ}C$이었으며 광은 형광등으로 조명도는 300 lux이었다. 기본배지에 lactose, ammonium sulfate와 $KH_2PO_4$를 첨가한 배지에서 균사의 생육은 좋았으나 자실체 형성은 기본배지에 현미(20 g)를 첨가한 배지에서 좋았다. 현미만으로는 70 g를 넣은 배지와 누에 번데기만은 80 g를 넣은 배지에서 에서 자실체의 형성이 좋았다. 현미와 누에번데기를 같이 넣었을 때는 현미 60 g에 누에번데기 40 g에서 다른 비율배지에 비해 자실체 형성이 좋았다. 관수는 2일 간격으로 한 처리구가 좋았으며 액체종균의 접종량은 $5{\sim}25\;ml$까지는 자실체 생육이 비슷함을 보이다가 접종량이 증가할수록 자실체 생육이 저조하였다.

• Environmental Analysis Health and Toxicology
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• 제24권3호
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• pp.219-229
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• 2009

The purpose of this study is to evaluate the skin whitening effect of Scirpi rhizama ethanol extract (SREE) in an animal model. For the experiment of the study, three brown guinea pigs weighing about 450 g to 550 g were exposed to ultraviolet-B rays on the backs at 500 $mJ/cm^2$ once a week, three consecutive weeks and the total quantity of light was 1,500 $mJ/cm^2$. The artificial tanning spots were divided into six different groups including normal (N), control (C), vehicle control (VC), positive control (PC), experimental 1 (E1, 1% SREE), experimental 2 (E2, 2% SREE) groups. Then, 30 ${\mu}L$ of SREE was transdermaly applied on the artificial tanning spots twice a day and 5 days a week for 8 weeks. With the result of a gross observation, it was found that the degree of pigmentation became apparently thinner in the group applied with E2, compared to the control or the vehicle control group. The melanin index of E2 group was significant lower than the control or the vehicle control group. In the observation with a light microscope, it was found that the degree of melanin pigmentation and S-100 protein expression considerably decreased in the groups applied with SREE, compared to the control or the vehicle control group. With the numerical analysis of melanin pigmentation and S-100 protein expression by using image-analysis software, it was found that the tendency was coincide with the results of microscopic observation.