• 인간식물환경학회지
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• 제24권6호
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• pp.563-572
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• 2021

Background and objective: The ongoing COVID-19 pandemic restricted daily life, forcing people to spend time indoors. With the growing interest in mental health issues and residential environments, 'pet plants' have been receiving attention during the unprecedented social distancing measures. This study aims to analyze the change in trends of pet plants before and during the COVID-19 pandemic and provide basic data for studies related to pet plants and directions of future development. Methods: A total of 2,016 news articles using the keyword 'pet plants' were collected on Naver News from January 1, 2018 to August 15, 2019 (609 articles) and January 1, 2020 to August 15, 2021 (1,407 articles). The texts were tokenized into words using KoNLPy package, ultimately coming up with 63,597 words. The analyses included frequency of keywords and topic modeling based on Latent Dirichlet Allocation (LDA) to identify the inherent meanings of related words and each topic. Results: Topic modeling generated three topics in each period (before and during the COVID-19), and the results showed that pet plants in daily life have become the object of 'emotional support' and 'healing' during social distancing. In particular, pet plants, which had been distributed as a solution to prevent solitary deaths and depression among seniors living alone, are now expanded to help resolve the social isolation of the general public suffering from COVID-19. The new term 'plant butler' became a new trend, and there was a change in the trend in which people shared their hobbies and information about pet plants and communicated with others in online. Conclusion: Based on these findings, the trend data of pet plants before and after the outbreak of COVID-19 can provide the basis for activating research on pet plants and setting the direction for development of related industries considering the continuous popularity and trend of indoor gardening and green hobby.

• 대한본초학회지
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• 제32권4호
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• pp.47-52
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• 2017

Objective : Phellinus spp. mushroom is an object of interest because it has excellent anticancer effect. Owing to the similalarities in the morphology, Phellinus linteus and Phellinus baumii are often used as same Sang Hwang Mushroom in the Korean market.. The quality control for mushrooms is needed because there are many differences in the efficacy according to cultivation method and cultivation area. Therefore, a reliable authentication method of these herbal medicine is necessary to compare and measure the amount of beta-glucan which is known to have a hypoglycemic effect, from the mushrooms collected in various regions Methods : 7 samples of medicinal mushrooms supplying phellinus spp. were collected in Korea, China and Cambodia. We investigated the hardness, colors, extract ratio, ${\alpha}-amylase$ and ${\alpha}-glucosidase$ inhibitory activities, glucose transporter 4 (GLUT-4) expressions of water extracts from Phellinus spp and also MTT assay were examined for cell toxicity. Results : The results revealed that Phellinus spp.water Ext.inhibited ${\alpha}-glucosidase$ activity. glucose transporter 4 (GLUT-4), the key insulin signaling pathway transcription factor, was remarkably increased by the Phellinus baumii water extract Conclusions : These results suggest that The more yellowish the mushroom is, the lower the hardness, the more the content of ${\beta}-glucan$ is proportional. Because the more ${\beta}-glucan$, the greater the effect of hypoglycemia. compared to the hypoglycemic effect, Phellinus Baumii grown at hanging on selves for 7 month in the green house is the best.

• 한국작물학회지
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• 제25권2호
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• pp.31-37
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• 1980

1. 간장에서 소맥의 Ephrat, Combine, Rousalka 대맥의 하가네무기, 무사시노무기, 영월륙각 과맥의 장기조생간, Wasehadaka, CI 09942, Liusanchia 01 등이 비교적 단간이고 일장변화에도 둔감한 품종이 있다. 2. 출수일수는 품종간 차이는 있으나 모두 단일에 의하여 출수기가 늦어졌고 소맥의 Sava 만이 12시간 일장에 비해 8시간에서 빨라졌다. 3. 성숙일수는 수맥의 중국8001 대맥의 올보리, 하가네무기, 경003, 수원006 과맥의 Kochihadaka, Wasehadaka, 장기한생과, 예산29호 등이 숙기도 빠르고 일장변화에도 안정된 품종이었다. 4. 일수입수는 품종별로 일정한 경향은 없으나 소맥의 원광, 남광, Blueboy, 수원 169호 대맥의 제천005, 시요기무기, Reno 과맥의 백동, Mochihadaka, CI 09867, CI 0968, Tawungmia 02는 수입수도 많고 일장변화에도 안정된 품종이었다. 5..주당수수는 소맥의 신광, Benhur, 관취기6006, 육성003는 단일에 의하여 수수가 증가하였고그 외에는 12시간 일장일 때에 가장 높고 24시간과 8시간에서 낮았으며 대맥은 제천005, 늘보리의 주당수수가 높았으며 Sava, Moldova는 8시간 일장일 때의 수수가 많았다. 과맥중 재래육각은 단일에 의한 증가폭이 컸으나 그 외의 품종은 단일에 둔감하였다. 6. 주당수량은 품종별로 일정한 경향은 없으나 소맥의 Littotio는 12시간에서 수량이 높았고 대맥의 제천005, 하가네무기, 삼척3006, CI 07296, 시요기무기 등이 안정된 높은 수량을 보였으며 과맥은 재래육각, Tawungmia 02, CI 09867은 수량이 높았다.

• 현장농수산연구지
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• 제7권1호
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• pp.55-63
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• 2005

마산업 경쟁력 제고에 필수적인 대량생산 체계 확립을 위한 둥근마 씨마 생산에 있어서 소절편 크기별 상품 괴경 생산 방법에 관한 연구는 다음과 같다. (1) 분할마를 심은지 30일 후에 3g, 5g, 7g, 9g, 12g씩 분할한 절편의 발아율은 60.3%, 80.5%, 85.3%, 98.6% 및 99.3%를 나타냈다. (2) 하우스재배에서 분할 절편에 따른 괴경 비대는 3g, 5g, 7g, 9g, 12g에서 66g, 87g, 98g, 120g, 140g을 나타냈다. (3) 노지재배에서 분할 절편에 따른 괴경 비대는 3g, 7g, 12g, 18g, 23g에서 35.2g, 124.7g, 142.7g, 174.8g, 200.7g을 나타냈다.

• 한국환경농학회지
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• 제42권1호
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• pp.21-27
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• 2023

Pre-harvest residue limits (PHRLs) have been proposed as criteria for a proactive role to exceed the maximum residue limit (MRL) of pesticides in agricultural products at harvest. However, PHRL numbers are significantly less than those of established MRLs. This study was performed to determine the dissipation constants and residual concentrations of lufenuron after application on crown daisy and chamnamul under green house conditions. Two residue field trials for each crown daisy and chamnamul were selected to consider a different geographical site at least 20 km far from one another. The pesticide was treated according to critical GAP. After samples were sprayed with lufenuron, they were collected at 0, 1, 3, 5, 7, 10, and 14 days and analyzed using HPLC-DAD. The mean recoveries of crown daisy and chamnamul were within the range of 70-120% with below 20% coefficient variation, which is within the acceptable limits specified by the manual of pre-harvest residue study for pesticides (MFDS, 2014). The biological half-lives in field I and field II were 7.0 and 4.6 days for crown daisy and 2.7 and 2.8 days for chamnamul, respectively. The lower bounds of 95% confidence intervals of dissipation rate constants of lufenuron in crown daisy were determined to be 0.0692 and 0.1298 for field I and field II, respectively, and in chamnamul were 0.2067 for both field I and field II. After applying lufenuron 5% EC, the lufenuron residues on crown daisy and chamnamul at the pre-harvest intervals (14 days for crown daisy and 7 days for chamnamul) were below the safe levels. The dissipation rates of lufenuron in crown daisy and chamnamul were evaluated for similarities with leafy vegetables based on a 95% confidence interval.

• 한국환경농학회지
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• 제41권4호
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• pp.318-327
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• 2022

BACKGROUND: The mean annual temperature of the Korean Peninsula will continue to rise due to global warming. 'Shiranuhi' mandarin-a late-harvest cultivar-is primarily cultivated in plastic greenhouses where high temperatures cannot be directly avoided. Therefore, growth and fruit quality changes under elevated temperatures must be investigated. METHODS AND RESULTS: Elevated temperatures were divided into three groups [2℃ (T-I), 4℃ (T-II), and 6℃ (T-III) above the ambient temperature] during the 2019-2020 season. Mean temperatures were 17.1℃, 18.6℃, and 20.2℃ in T-I, T-II, and T-III, respectively. The bud bursts in T-II and T-III were earlier than that in T-I at 7 days and 11 days, respectibely. And the full blooms in T-II and T-III were earlier than that in T-I at 11 days and 23 days, respectively. Fruit size significantly increased with increased temperature. The citrus color index in the coloring phase markedly differed across treatments. Further, total soluble solid and acid contents markedly changed with temperature rise but the sugar-to-acid ratio did not. Sucrose content tended to decrease with increase in temperature, but citric acid content remained unaffected. CONCLUSION(S): Elevated temperature accelerated plant growth and development but delayed rind color development in 'Shiranuhi' mandarin. Therefore, rise in ambient temperature by >4.6℃ may negatively affect yield and fruit quality.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2022년도 추계학술대회
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• pp.164-164
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• 2022

The soybean (Glycine max(L.) Merrill), an important food crop in the world, is popular because of its high quality protein and oil content. Soybeans as a food have long been known for their beneficial effects on health and are well-recognized globally. Isoflavones, significant soybean secondary metabolic products, may be crucial in avoiding some cancers and lowering the risk of cardiovascular disorders. This study investigates the correlation between plant growth regulator and the effect on the isoflavone levels in soybean leaves. The study was carried out in the green-house of the southern crop department in miryang. Soybeans(Seonpung) were cultivated in 1/2000 of the Wagner pot. Ethephon(500, 1000, 2000 ppm) and ABA(100, 200, 400 ppm) were used as plant growth regulators, and they were each treated on R2, R5, and R7 stage. After treatment, leaves were sampled three times at intervals of 5 days, and the content of 6 isoflavones and coumestrol was analyzed. Soybean isoflavones were analyzed using Ultra Performance Liquid Chromatography (Acquity UPLC H-Class system, Waters). The isoflavones content showed an overall highly in the R5 stage, and the level was similar to that of no treatment in the R2 and R7 stage. The difference between the growth regulators was found to be higher than that of ethephon when ABA was treated. The coumestrol content was confirmed to be high in the order of R7, R5, and R2 on the treatment time, and it was found that the content increased as the treatment time was delayed. In the treatment with the growth regulator, the coumestrol content tended to be higher when ethephon was treated than ABA.

• 한국수소및신에너지학회논문집
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• 제34권6호
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• pp.667-672
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• 2023

This study proposes polymer electrolyte membrane fuel cell (PEMFC) based cogeneration system for greenhouse heating and cooling. The main scope of this study is to examine the proposed cogeneration system's suitability for the 660 m²-class greenhouse. A 25 kW PEMFC system generates electricity for two identical air-cooled heat pumps, each with a nominal heating capacity of 70 kW and a cooling capacity of 65 kW. Heat recovered from the fuel cell supports the heat pump, supplying hot water to the greenhouse. In cooling mode, the adsorption system provides cold water to the greenhouse using recovered heat from the fuel cell. As a result, the cogeneration system satisfies both heating and cooling capability, performing 175 and 145 kW, respectively.

• 원예과학기술지
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• 제28권3호
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• pp.403-408
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• 2010

본 실험은 비닐온실 내에서 0%, 35%, 55%, 75% 차광처리에 따른 진달래($Rhododendron$ $mucronulatum$ Turcz.)와 영산홍($R.$ $indicum$ (L.) Sweet) 묘목의 생리적 반응을 조사하기 위하여 수행되었다. 차광처리는 생육 후반기인 2008년 9월 9일부터 11월 5일까지 시행되었다. 차광처리는 9월의 낮 온도를 0.9-$1.7^{\circ}C$, 10월에는 0.8-$1.7^{\circ}C$ 정도를 낮추는 효과가 관측되었다. 차광처리 전 진달래 및 영산홍의 함수율은 각각 68.5%, 66.3%이었으며, 차광처리 기간 후 75% 차광 하의 진달래의 함수율은 66.2%로써 3.4%가 감소하였으며, 영산홍은 65.9%로써 0.6%가 감소하였다. 두 수종 모두 차광 수준이 높아질수록 감소율이 낮아지는 유사한 경향을 보였다. 영산홍의 광합성능력은 차광 수준이 높아질수록 높았는데 75% 차광에서 $9.63{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$로 가장 높았다. 한편, 세포간극 내 $CO_2$의 농도, 기공전도도 및 증산율 역시 전광 하의 묘목에 비하여 차광처리에 따라 높았는데 55%, 35% 및 75% 차광순이었다. 수분이용효율은 전광의 묘목이 차광처리 묘목에 비하여 상대적으로 높은 것으로 조사되었다. 차광처리를 받지 않은 진달래 잎색은 자주색에 가까운 색으로 변색한 반면, 차광처리 수준이 높을수록 육안으로도 녹색이 지속되고 있는 것이 관찰되었다. 이러한 차광 수준별 진달래 잎색의 변화를 Munsell Color Chart로 정리한 결과 전광의 경우 R(red)과 Y(yellow) chart의 색이 많은 반면 차광 수준이 높을수록 G(green), Y의 chart에 속하는 비율이 높아 여전히 녹색을 많이 띄고 있었다.

• 한국전통조경학회지
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• 제33권2호
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• pp.21-35
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• 2015

본 연구는 미수 허목의 정원 유적인 연천 은거당의 공간구성 및 정원적 특질을 구명하기 위해, "미수기언" 등의 시문과 고지도 그리고 소치 허련의 <연천 태령십청원도>를 중심으로 은거당의 입지와 핵심 정원인 십청원과 괴석원의 공간구성, 정원식물과 시설 등을 조사 분석한 것으로 연구 결과는 다음과 같다. 은거당의 건물은 안채, 사랑채, 별묘 그리고 행랑채 등이며 정원은 안채와 별묘 사이의 십청원과 녹봉으로 이어지는 후원 그리고 사랑채 전정의 괴석원 등으로 모두 괴석을 정원시설로 중요하게 활용한 것으로 확인된다. "십청원기" 등 기문 분석과 후손의 인터뷰 결과, 십청원은 하도를 표방한 용도서를, 괴석원은 낙서를 상징한 귀문원을 구현하고자 한 석정(石庭)의 형태를 갖는 정원으로 추정된다. 또한 십청원에 도입된 상록식물은 용도서에 등장하는 십장청(十長靑)의 식물과 일치하는데 이를 통해 맑고 시원한 이미지를 추구한 것으로 판단되며 괴석과 함께 활용함으로써 성리학적 격물치지(格物致知)와 불로장생의 도가적 이상세계의 소우주를 구현한 것으로 이해된다. 또한 괴석원과 주변에 도입된 화려한 화목과 화초는 귀문원에서 찾을 수 있는 변화의 용(用)을 의미하며 십청원의 상록식물과 대비를 이룬다. 더불어 은거당 정원에 도입된 괴석은 미수의 전서체에서 느껴지는 기이함과 동질의 미적 대상으로서 창고미(蒼古美)와 고태미(古態美)를 창출하고자 한 것으로 파악된다. 궁극적으로 미수는 상록식물로 바탕을 삼고 화훼류로 변화를 꾀하며 기(氣)의 체(體)와 골(骨)에 해당하는 괴석을 둠으로써 그 뜻을 더욱 견고히 한 것으로 추론되며 이는 은거당의 정원적 특질로 귀착된다. 본 연구에서 얻어진 은거당 정원의 의장적(意匠的) 특질은 향후 은거당 복원의 기초자료로 활용되기를 기대한다.