• 응용통계연구
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• 제30권3호
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• pp.417-426
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• 2017

국내외적으로 벚꽃의 개화시기와 단풍 시작일에 대한 관련 연구가 많이 되어왔는데, 매해 기상청은 이들에 대하여 보도자료를 통하여 당해 연도 예측시기 및 전년도와의 차이를 발표하고 있다. 본 연구에서는 선형회귀모형을 통해서 이들의 개화시기 및 단풍시기에 영향을 줄 수 있는 월별 평균, 최저, 최고온도, 강수량 그리고 일조량 등과 같은 여러가지 기상변수를 확인하였고 관측되지 않은 지역에 대한 예측을 위해서 기존의 모형에 공간구조를 추가하여 분석하였다. 본 연구에서 제안된 모형을 2009년부터 2016년의 기상청 보도자료에 적용하였고 기존의 기상청 예측값과 비교하였다. 그리고 공간분석을 통해 한반도 전역의 벚꽃 개화시기와 단풍 시작일을 예측하였다.

• 한국수산과학회지
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• 제41권5호
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• pp.343-345
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• 2008

This study determined the optimum feeding frequency for the growth of juvenile cherry salmon (Oncorhynchus masou). Triplicate groups of fish (initial mean weight 19.1 g) were fed extruded pellets at four feeding frequencies for 50 days: once every 2 days, once a day, twice a day, and three times a day. The mean water temperature during the feeding trial was $17.9{\pm}1.59^{\circ}C$. The survival of all groups was 100%. The final fork length of fish fed twice a day was significantly greater than that of the other groups (P<0.05). The weight gain of fish fed two and three times daily was significantly greater than that of fish fed once a day or every 2 days (P<0.05). The daily feed intake increased significantly with feeding frequency (P<0.05), but there was no significant difference in the weight gain of fish fed two or three times a day. The feed efficiency of fish fed once every 2 days was highest (P<0.05), and the feed efficiency of fish fed two or three times a day was significantly higher than that of fish fed once a day (P<0.05). The results of this study indicated that the optimum feeding frequency for the growth of juvenile cherry salmon is twice a day, while the feeding efficiency of fish fed once every 2 days was best.

• 한국환경농학회지
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• 제41권4호
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• pp.245-251
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• 2022

BACKGROUND: Selection an suitable light source is essential in the year-round production of horticultural crops in closed production systems such as plant factory with controlled environments. This study was investigated to confirm the effects of artificial light sources on growth of cherry tomato'CF Jelly'(Lycopersicon esculentum var.) under high-pressure sodium lamps (HPS), metal-halide lamps (MH), and LEDs. METHODS AND RESULTS: Light intensity of the light sources was controlled at 220±30 µmol/m²/s with 12 hrs of photoperiod for a day. Flower development was significantly faster in HPS and MH treatments compared to the LEDs. There was no significant difference between the leaf number and leaf shape under the HPS and MH treatments. Reproductive growth of cherry tomato was significantly promoted by the LEDs treatment of blue plus red lights. Fruit yield per plant also increased under the LEDs compared to the others. CONCLUSION(S): Growth, flowering, and fruit setting of the cherry tomato were accomplished by the artificial lights under plant factory conditions. The HPS treatment showed negative effect on fruit quality in terms of blossom-end rot incidence compared to the LEDs or MH treatment. Effect of the LEDs on promotion of fruit weight and yield was also proved. Additional research should be carried out for improving sugar metabolism or decreasing disease in the fruits under plant factory system using only artificial lights.

• 한국산림과학회지
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• 제96권2호
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• pp.208-213
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• 2007

This study is designed to provide forest managers and landowners with tools to estimate the effect of forest management on carbon storage, investigating living tree biomass, detritus, and harvested wood products as variables. Thinning, selection cutting, and uncutting were applied to the three different forest types in New York, USA. Carbon storage of the original stands was 90, 56, and $101Mg\;ha^{-1}$ at the Allegheny hardwood forest, Northern hardwood forest, and Oak - black cherry forest, respectively. Among treatments, uncutting generally stored the greatest amount carbon. However, the rate of carbon storage was the smallest at the uncut treatment in all the sites. The 50% thinning, 50% selection, and 50% thinning treatments were the highest rate of carbon storage at the Allegheny hardwood forest, Northern hardwood forest, and Oak - cherry forest, respectively. In this study, only short term was applied to simulate carbon sequestration after silvicultural treatment. So, more research is needed to determine whether any silvicultural treatment can store significantly more carbon than no treatment over the long term.

• Korean Journal of Chemical Engineering
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• 제35권12호
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• pp.2430-2441
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• 2018

Selenium (Se)-rich binary Cu-Se and In-Se nanoparticles (NPs) were synthesized by a modified heat-up method at low temperature ($110^{\circ}C$) using the gum exudates from a cherry blossom tree. Coating of CISe absorber layer was carried out using Se-rich binary Cu-Se and In-Se NPs ink without the use of any external binder. Our results indicated that the gum used in the synthesis played beneficial roles such as reducing and capping agent. In addition, the gum also served as a natural binder in the coating of CISe absorber layer. The CISe absorber layer was integrated into the solar cell, which showed a power conversion efficiency (PCE) of 0.37%. The possible reasons for low PCE of the present solar cells and the steps needed for further improvement of PCE were discussed. Although the obtained PCE is low, the present strategy opens a new path for the fabrication of eco-friendly CISe NPs solar cell by a relatively chief non-vacuum method.

• 한국육종학회지
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• 제40권4호
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• pp.439-442
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• 2008

A new spray chrysanthemum cultivar, 'Cherry Blossom' was released by National Horticultural Research Institute (NHRI), Rural Development Administration (RDA), Korea in 2007. A cross was made in 2002 between 'Relance', a spray cultivar with red petals and resistant to white rust and 'Yeonja', a spray cultivar with pink petals. Trials were conducted from 2005 to 2007 for the evaluation and selection of this cultivar, including shading culture in summer and retarding culture in autumn. The natural flowering time of "Cherry Blossom" is late October, but year-round flowering is possible by shading and lighting treatment. This cultivar is single type flowers with dark pink petals and green flower center and resistant to white rust. It is very stable color of petals when the variety is cultivated under high temperature conditions in summer season. The diameter of flower is 55.0 mm. The number of flowers per stem is 10.5 and the number of petals per flower is 24.0. The days to flowering under the short day treatment is about 45 in spring season.

• Journal of Korean Neurosurgical Society
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• 제66권2호
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• pp.121-132
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• 2023

Objective : The parafascicular nucleus (PF) plays important roles in controlling the basal ganglia. It is not well known whether the PF affects the development of abnormal involuntary movements (AIMs). This study was aimed to find a role of the PF in development of AIMs using optogenetic methods in an animal model. Methods : Fourteen rats were underwent stereotactic operation, in which they were injected with an adeno-associated virus with channelrhodopsin (AAV2-hSyn-ChR2-mCherry) to the lateral one third of the PF. Behavior test was performed with and without optical stimulation 14 days after the injection of the virus. AIM of rat was examined using AIM score. After the behavior test, rat's brain was carefully extracted and the section was examined using a fluorescence microscope to confirm transfection of the PF. Results : Of the 14 rats, seven rats displayed evident involuntary abnormal movements. AIM scores were increased significantly after the stimulation compared to those at baseline. In rats with AIMs, mCherry expression was prominent in the PF, while the rats without AIM lacked with the mCherry expression. Conclusion : AIMs could be reversibly induced by stimulating the PF through an optogenetic method.

• 생물환경조절학회지
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• 제4권1호
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• pp.43-49
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• 1995

양액재배에서 제주송이가 다른 배지와 비교하여 방울토마토의 수량 및 품질에 미치는 영향과 양액성분 변화를 조사하여 제주송이를 양액재배용 고형배지로 실용화하기 위하여 시험한 결과는 다음과 같다. 1. 건엽비, 건과비, 당산비는 1익㉣ 1회 1시간 담액후에 완전 배액한 구에서 높았다. 2. 방울토마토 생과중은 상위 화방으로 갈수록 암면구와 담액수경구는 작아졌으나, 송이구와 일향토구, 펄라이트구 등 고형배지경에서 무거웠다. 3. 방울토마토의 생육이 왕성한 시기에 양액성분중 다량원소를 분석한 결과는 송이 재배구에서 인산과 칼륨 농도가 낮았다. 4. 방울토마토의 수량과 당도는 암면과 일향토구에서 높은 경향을 보였다. 5. 일반적으로 양액재배에서는 수분의 증발과 식물의 수분 흡수 증산작용으로 비료염의 농도가 높아가는데 송이구도 다른 고형배지경과 비슷한 결과를 보였다. 6. 제주 송이 양액재배용 고형배지로 손쉽게 이용할 수 있는 가벼운 자재로 가공개발 연구가 있어야 할 것으로 본다.

• 생물환경조절학회지
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• 제5권1호
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• pp.79-88
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• 1996

방울토마토 잠액 수경재배에 육묘단계를 생략한 재배기술을 확립하기 위하여 ‘Pico’, ‘Pepe’ 및 ‘Koko’ 3품종의 측지를 육묘상에서 15일간 육묘한 것과 양액 재배상에 바로 정식하고 양액의 농도를 표준과 50% 농도의 2수준으로 처리하여 생육상태와 수량을 조사하였다. 1. 직접정식이 육묘정식보다 초기 생육단계에서 초장이 길었고, 엽수가 많았으며 엽면적이 넓었다. 수확시기는 직접정식이 육묘정식보다 6일 정도 빨랐고 품종간에는 ‘Pepe’가 다른 2품종보다 빨랐으며 양액 농도간에는 차이가 없었다. 2. 과일 1개당 평균 무게는 정식묘가 양액의 농도에 따른 영향은 없었고 품종간에는 ‘Pepe’가 적었다. 그리고 수량은 표준농도의 양액에 직접 정식한 ‘Pepe’에서 가장 많았다. 3. 과즙의 당도는 직접 정식한 구가 육묘 정식한 구보다 높았고 품종간에는 ‘Pepe’가 높았다.

• 원예과학기술지
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• 제35권3호
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• pp.300-313
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• 2017

'Unicon' cherry tomato (Solanum lycopersicum) is one of the most highly perishable horticultural crops due to its high water content and respiration rate. This study was carried out to assess the effect of continuous application of $CO_2$ (control [air], 3%, and 5%) on the quality and shelf life of cherry tomato fruits stored at $10^{\circ}C$ and $85{\pm}5%$ relative humidity (RH) at two maturity stages (pink and red). Continuous application of $CO_2$ did not affect the soluble solids content (SSC) or titratable acidity (TA) of the fruit at either maturity stage during storage. However, there was a significant difference among treatments in terms of flesh firmness, cell wall thickness, pectin content, vitamin C content, skin color, lycopene content, weight loss, ethylene production rate, respiration rate, and acetaldehyde and ethanol production. Fruits treated with 5% $CO_2$ maintained their high quality with regards to vitamin C, skin color ($a^*$), lycopene content, weight loss, physiological parameters (ethylene production rate, respiration rate, and volatile compounds), flesh firmness, cell wall thickness, and pectin content at both maturity stages compared with 3% $CO_2$ treatment and the control. Continuous application of $CO_2$ (5%) reduced the ethylene production rate and the production of volatile compounds during storage. Therefore, cherry tomato 'Unicon' fruit can be stored for two weeks without losing fruit quality at both maturity stages under continuous application of 5% $CO_2$ as a postharvest treatment.