• 한국식품과학회지
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• 제34권5호
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• pp.919-923
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• 2002

'Manita', a red pepper cultivar, and 'HL', a cultivar bred for single-harvest by National Horticultural Research Institute, were cultivated using direct sowing method, and all fruits were harvested five times at on interval of one week, and were grouped into five grades by color and appearance (drying degree). The amount of red fruits increased gradually with increasing harvest time, and at the fifth harvest time, the ratios of red fruits were 80.9 and 79.1% for Manita and HL, respectively. Among red fruits, the portion of ROO grade (red pepper dried considerably on the plant) was 42.9%, RO (red pepper dried partially on the plant) 31.9%, and RF (fresh red pepper) 6.1% for Manita. For HL, the portions of RO and RF were 56.7 and 22.4%, respectively. As fruits aged, the redness intensified. ROO, RO, and RF fruits had ASTA color values of 150.4, 140.1, and 107.4 for Manita, and for HL, those of RO and RF were 100.0 and 77.1, respectively. The contents of capsaicinoids, organic acid, and sugar were not significantly different with the harvest time.

• 한국전기전자재료학회논문지
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• 제34권5호
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• pp.283-295
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• 2021

For the last decades, a research hotspot for the halide perovskites (HPs) is now showing great progress in terms of improving efficiency for numerous photovoltaic devices (PVDs). However, it still faces challenges in the case of long-term stability in the air atmosphere. Defect-free high-quality HP single crystals show their promising properties for the remarkable development of highly efficient and stable PVDs. Here, we summarize the growth processing routes for the stable HP single crystals as well as briefly discuss the pros and cons of those well-established synthesis routes. Furthermore, we briefly include the comparison note between the HP single crystals and polycrystalline perovskite films regarding their device applications. Based on the future progress, the review concludes subjective perspectives and current challenges for the development of HPs high-quality PVDs.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제11권4호
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• pp.1889-1910
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• 2017

This paper investigates a protocol so-called Adaptive Harvest Then Transmit (AHTT) for wireless powered communication networks (WPCNs) in multiple-input single-output (MISO) downlink systems, which assists in transmitting signals from a multi-antenna transmitter to a single-antenna receiver. Particularly, the power constrained relay is supplied with power by utilizing radio frequency (RF) signals from the source. In order to take advantage of multiple antennas, two different linear processing schemes, including Maximum Ratio Combining (MRC) and Selection Combination (SC) are studied. The system outage capacity and ergodic capacity are evaluated for performance analysis. Furthermore, the optimal power allocation is also considered. Our numerical and simulation results prove that the implementation of multiple antennas helps boost the energy harvesting capability. Therefore, this paper puts forward a new way to the energy efficiency (EE) enhancement, which contributes to better system performance.

• 한국식품과학회지
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• 제34권1호
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• pp.128-131
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• 2002

'Manita', a red pepper cultivar being cultivated currently and 'HL', a cultivar bred for single-harvest by National Horticultural Research Institute were grown by direct sowing and raising seedling methods, respectively, and all the fruits on the tree were harvested once. Fruits were grouped into 6 grades by color and appearance and their chemical compositions were analyzed. Generally, 'HL' showed less redness and contained less amounts of capsaicin, organic acid, Vit. C, and sugar than 'Manita'. Regardless of cultivar and cultivation method, red-old fruits, ripened and partially dried on the plant, had more red color (21-30%) and more capsaicin (40.0-78.3 mg% vs. 33.2-52.7 mg%), but less sugar (12.70-16.69% vs. 14.46-17.43%) than red-fresh fruits. No difference was found between direct sowing and raising seedling.

• 생물환경조절학회지
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• 제8권3호
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• pp.164-171
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• 1999

싱글트러스토마토시스템을 국내에 도입하여 효율적으로 생산관리를 하는데 필요한 자료를 제공하기 위하여 기존의 모델을 이용하여 지역별로 수확량, 수확시기를 예측하고 효율적인 생산관리 가능성을 분석한 결과를 요약하면 다음과 같다. 우리나라의 전지역이 겨울철에 최대수확 가능량을 달성하는데는 광량이 부족한 것으로 나타나 인공광을 이용한 생산량 증대가 가능할 것으로 판단되었다. 수원지역과 진주지역의 연간 총 수확량의 차이가 12kg.m$^{-2}$ 으로 나타나 토마토 온실의 설치 계획시 지역의 자연광 특성을 고려하여야 할 것으로 판단되었다. 지역과 계절에 따라 차이는 있으나 인공광을 이용하여 수확시기의 조절이 가능한 것으로 나타났다 인공광의 이용에는 많은 경비가 소요되기 때문에 인공광의 용량을 지역에 따라 적절하게 결정할 수 있는 방법과 저렴한 심야전기를 가능하면 많이 이용할 수 있는 인공광의 제어전략 등에 관한 추가적인 연구가 요구된다.

• 한국환경농학회지
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• 제31권3호
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• pp.271-276
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• 2012

BACKGROUND: It is hard to control the agricultural products exceeding MRL (maximum residue limit) before forwarding. Therefore, NAQS (National Agricultural Products Quality Management Service, South Korea) established PHRL (pre-harvest residue limit) on agricultural products during their cultivation periods. This study was performed to set the PHRLs of peach during cultivation period, and also to estimate biological half-lives for residues of clothianidin and fluquinconazole. METHODS AND RESULTS: Two groups of peach were treated under Korean GAP (Good Agricultural Practices) with application time, single and triple treatments. Sample was collected over 14days (each after 0, 2, 4, 6, 8, 10, 12, 14 days. 8times), and clothianidin and fluquinconazole were analyzed by HPLC/DAD and GC/ECD, respectively. CONCLUSION: The biological half-life of clothianidin in single treatment and triple treatment was 5.2days and 7.0days. That of fluquinconazole was also 3.9days and 4.1days, respectively. The PHRL of peach on 10days before harvest was 1.4 mg/kg in clothianidin and 1.8 mg/kg in fluquinconazole.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2013년도 제44회 동계 정기학술대회 초록집
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• pp.162-162
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• 2013

Magnetic properties of 3d transition metals were determined by exchange interaction between magnetic ions that was characterized by the exchange integral. Bulk Mn material is one of transition metals that have been well known as an anti-ferromagnetic material due to an anti-parallel spin with negative exchange integral. Here we report on the MBE growth of Mn on $BaTiO_3$ (001) substrate and induced ferromagnetism. The bcc ${\alpha}$-Mn single crystal film has been grown on $BaTiO_3$ (100) substrate. The XRD and Raman results indicated that the structural phase transitions of $BaTiO_3$ substrate induced a lattice distortion at the interface. Consequently, the grown Mn film exhibits ferromagnetism with strong saturation magnetization of 495 emu/$cm^3$ at 320 K. The electrical resistivity of the Mn film strongly depended on the crystal structure of $BaTiO_3$ substrate.

• 한국식품과학회지
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• 제35권2호
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• pp.329-333
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• 2003

Fruits of 'Manita', a red pepper cultivar, and 'HL', a cultivar bred for single-harvest, cultivated by direct sowing method were harvested simultaneously. The red fruits were freeze-, sun-, indoor-, hot-air $(65^{\circ}C)$, and excessive hot-air (50% longer time) dried. For Manita. ASTA values of freeze- and indoor-dried red pepper were the highest $(153.6{\sim}168.4)$, and those of sun- and hot air-dried ones were $119.2{\sim}131.5$. Excessive hot-air drying decreased the redness by about $9{\sim}15%$ compared to normal hot-air drying. For HL, ASTA values $(150.3{\sim}171.7)$ of indoor-dried red peppers were much higher than other dried peppers. Red pigment in HL was destroyed easily during sun drying, showing values of only $49.2{\sim}69.2$. By excessive hot-air drying, the redness did not decrease, compared to normal hot-air drying. The organic acid contents of both cultivars were higher in sun- and hot-air-dried ones than freeze- and indoor-dried ones. Copsaicinoid contents of both cultivars decreased up to 22% by excessive hot-air drying compared to normal hot-air drying. Sugar contents were lower in all drying methods other than freeze drying for both cultivars.

• 농약과학회지
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• 제18권1호
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• pp.1-7
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• 2014

본 연구는 참외에 대한 살균제 metalaxyl-M과 flusilazole의 잔류량 변화를 측정하여 약제별 잔류특성을 파악하고, 반감기를 산출함으로써 생산단계 잔류허용기준(PHRL, Pre-Harvest Residue Limit) 설정을 위한 기초자료로서 활용하고자 수행하였다. 공시 약제인 metalaxyl-M과 flusilazole은 안전사용기준에 준하여 7일 간격으로 1회, 2회살포하였으며, 살포 2시간 후를 0일차로 하여 0, 1, 2, 3, 5, 7, 9, 11일차에 수확하였고, 잔류량의 경시변화 결과를 토대로 생물학적 반감기를 산출하였다. 시료는 QuEChERS방법을 이용하여 전처리하였으며, metalaxyl-M의 경우 GC/NPD를 이용하여 분석하였으며, flusilazole은 LC/MS/MS를 이용하여 분석하였다. 참외 중 metalaxyl-M과 flusilazole의 LOQ (Limit of quantitation)는 각각 0.02 mg/kg, 0.01 mg/kg이었으며, metalaxyl-M 회수율은 95.7-103.2%이었고, flusilazole은 100.2-106.8%이었으며, 표준편차는 모두 10% 미만이었다. 참외 중 각 농약에 대한 생물학적 반감기는 flusilazole의 경우 1, 2회 처리구에서 12일이었으며, metalaxyl-M의 경우 23일이었다. 본 연구결과, metalaxyl-M 및 flusilazole의 수확 10일 전 PHRL은 각각 1.5, 0.3 mg/kg로 나타났으며, 수확 시 metalaxyl-M, flusilazole의 잔류농도는 MRL을 초과하지 않을 것으로 예측되었다.

• BMB Reports
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• 제57권2호
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• pp.79-85
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• 2024

Pre-harvest sprouting is a critical phenomenon involving germination of seeds in the mother plant before harvest under relative humid conditions and reduced dormancy. In this paper, we generated HDR mutant lines with one region SNP (C/T) and an insertion of 6 bp (GGT/GGTGGCGGC) in OsERF1 genes for pre-harvest sprouting (PHS) resistance using CRISPR/Cas9 and a geminiviral replicon system. The incidence of HDR was 2.6% in transformed calli. T₁ seeds were harvested from 12 HDR-induced calli and named ERF1-hdr line. Molecular stability, key agronomic properties, physiological properties, and biochemical properties of target genes in the ERF1-hdr line were investigated for three years. The ERF1-hdr line showed significantly enhanced seed dormancy and pre-harvest sprouting resistance. qRT-PCR analysis suggested that enhanced ABA signaling resulted in a stronger phenotype of PHS resistance. These results indicate that efficient HDR can be achieved through SNP/InDel replacement using a single and modular configuration applicable to different rice targets and other crops. This work demonstrates the potential to replace all genes with elite alleles within one generation and greatly expands our ability to improve agriculturally important traits.