본 연구는 관상가치가 뛰어난 산꼬리풀의 분화 재배법을 확립하고자 차광, 기비, 추비, 왜화제 및 적심처리를 각각 달리하여 수행하였다. 연구의 결과 차광 시 산꼬리풀의 생육이 감소 하였으며, 차광률이 증가할수록 크게 억제되었다. 기비 처리는 초장, 절간장, 경직경 및 엽수를 유의적으로 증가하였으나, Hyponex를 이용한 추비 처리는 무처리와 비교했을 때 생육증가에 큰 영향을 미치지 않았다. 왜화제 처리시 diniconazole은 농도에 관계없이 왜화효과가 나타났으며, 농도가 증가할수록 크게 억제되었다. Daminozide는 저농도 처리시 무처리와 비교하여 큰 차이가 없었으나, 2000mg·L-1 농도로 처리하였을 때 왜화효과가 나타났으며, 개화율은 diniconazole 저농도에서 가장 낮은 결과를 보였다. 한편 적심 처리에 따른 유의적인 생육 차이는 확인되지 않았다.

농촌진흥청 국립원예특작과학원에서는 2017년 빅립 형태의 분홍색계 팔레놉시스 ‘Lovely Angel’을 개발하였다. 2009년 백색 팔레놉시스 P. ‘Timonthy’와 빅립을 가지는 분홍색 P. World Class ‘Big Foot’을 모본과 부본으로 교배하였다. 2013년 생육이 우수하고 화색, 화형, 꽃대수 등 개화 특성이 우수한 ‘09056-12’를 개체선발하여 기내 화경배양을 통해 증식하였다. 2014년부터 2017년에거쳐 1차, 2차 특성검정을 통해 품종의 안정성과 균일성을 확인하여 ‘Lovely Angel’을 육성하였다. 이 품종은 밝고 선명한 보라빛 분홍색(RHS, PVG81C)을 띄며, 줄 무늬를 가지고 있고 설판이 큰 빅립 형태가 특징적이다. 안아피는 형태의 꽃은 길이와 폭이 각각 6.1, 5.6cm이며, 1개의 꽃대에 20.6개의 소화가 착생하여 꽃 수가 비교적 많이 달리고, 꽃대 길이는 31.8cm 이다. ‘Lovely Angel’는 생육시 잎은 반하수로 자라며 길이는 18.7cm, 폭은 6.8cm이다. 신품종인 ‘Lovely Angel’은 소형 분화용으로 이용 가능할 것이다.

To enhance the thermal properties of epoxy composites, expanded graphite (EG) was oxyfluorinated and embedded into epoxy resin as a reinforcement. The maximum thermal conductivity was obtained for epoxy composites with oxyfluorinated EG, representing a 62% increase compared to that of neat epoxy. Additionally, the glass transition temperature (Tg) and integral procedural decomposition temperature of epoxy composites with oxyfluorinated EG show the increase of 6% (4.4 °C) and 106% (264 °C), respectively, which indicated the improvement in thermal stability. These results can be attributed to the interfacial interaction between epoxy and oxyfluorinated EG, which formed strong interfacial interactions between the epoxy resin and EG due to the presence of oxygen- and fluorine-containing functional groups in oxyfluorinated EG.

본 연구는 스파티필름의 수분 스트레스 정도에 따라 실내 공간 내 오염물질 제거 효율을 구명하고자 수행하였다. 식물이 없는 공간을 대조구, 정상적인 스파티필름과 수분 스트레스를 받은 스파티필름을 각각의 처리구로 하였다. 스파티필름의 수분 스트레스 유무에 따른 chamber 내 온도를 조사한 결과 대조구와 처리구 모두 식물의 생육 적정 범위인 23±1℃를 유지하였으며, 처리 간의 0.7℃의 차이를 보였다. 습도의 경우 대조구와 처리구는 유의차 있게 나타났으며, 처리 간의 유의 차는 없는 것으로 나타났다. 수분 스트레스에 따른 실내 오염 물질을 조사한 결과, 포름알데히드(Formaldehyde) 경우 대조구는 0.30mg･m-3, 정상적인 스파티필름은 0.05mg･m-3 , 수분 스트레스를 받은 스파티필름은 0.09mg･m-3으로 대조구와 처리구는 통계적으로 유의차를 보였으며, 식물 내 수분 스트레스에 따른 처리구간에는 유의차가 없었다. TVOC(Total Volatile Organic Compound)조사 결과, 정상적인 스파티필름의 TVOC는 5시간 후 0.00mg･m-3 으로 모두 제거 된 반면, 수분 스트레스를 받은 스파티필름은 0.34mg･m-3으로 다소 남아 있었으며, 대조구는 1.25mg･m-3으로 세 처리 모두 통계적으로 유의차 있게 나타났다. 또한 이산화탄소 변화량 조사결과, 대조구는 459ppm, 정상 스파티필름은 446ppm으로 통계적으로 유의한 차이는 없으며, 수분 스트레스를 받은 스파티 필름이 대조구보다 이산화탄소 함량이 다소 높았다. 기공변화율 조사 결과, 정상 스파티필름의 변화율은 높게 나타났으며, 수분 스트레스를 받은 스파티필름은 변화율이 낮은 것으로 조사되었다. 따라서, 스파티필름이 배치되어있지 않은 공간보다 배치된 공간이 공기정화에 효과적이며, 수분 스트레스를 받은 스파티필름은 실내오염물질 제거에 있어서 기공 변화율 및 이산화탄소 흡수능력이 저하되므로 스파티필름을 이용하여 효과적으로 실내오염물질을 제거하기 위해서는 적절한 수분 관리가 필요한 것으로 판단된다.

The black cutworm, Agrotis ipsilon (Hufnagel, 1766) is a cosmopolitan pest that poses an economic threat to many crops such as pepper, corn, perilla, etc. A. ipsilon can be mass reared by providing Chinese cabbage, Brassica rapa under 60~70%, 16L:8D and 25±1℃ in laboratory. This study presents the mass rearing methods and the morphological characteristics of the immature stages of A. ipsilon including descriptions of the each immature stages.

The turnip sawfly, Athalia rosae is one of the main pests that damage the leaves of cabbage, radish and other cruciferous crops. The developmental biology and morphological characteristics of the immature stages of Athalia rosae were studied in the laboratory using host plant, Chinese cabbage, Brassica rapa var. glabra. A. rosae can be mass reared in laboratory throughout the year under RH 60~70%, 16L:8D and 25±1℃. This species has six larval stages in the female and five larval stages in the male. The developmental period is about 28~29 days. Ovipositional periods and larval developmental periods were 6, 9 days, respectively. The pupal period was about 14 days. Illustrations and descriptions of the various immature stages and their behaviors are provided.

TiO2-doped activated carbon fibers (ACFs) were successfully prepared as capacitive deionization (CDI) electrode materials by facile ultrasonication-assisted process. ACFs were treated with titanium isopropoxide (TTIP) and isopropyl alcohol solutions of different concentrations and then calcinated by ultrasonication without heat-treatment. The results show that a certain amount of anatase TiO2 was present on the ACF surface. The specific capacitance of the TiO2-doped ACF electrode was remarkably improved (by 93.8% at scan rate of 50 mV s–1) over that of the untreated ACF electrode, despite decreases in the specific surface area and total pore volume upon TiO2 doping. From the CDI experiments, the salt adsorption capacity and charge efficiency of the sample with TTIP percent concentration of 15% were found to considerably increase by 71.9 and 57.1%, respectively. These increases are attributed to the improved wettability of the electrode, which increases the number of surface active sites and facilitates salt ion diffusion in the ACF pores. Additionally, the Ti-OH groups of TiO2 act as electrosorption sites, which increases the electrosorption capacity.

Porcine spermatogonial stem cells (SSCs) prefer three-dimensional (3D) culture systems to 2D ones for the maintenance of self-renewal. Of the many 3D culture systems, agar-based hydrogels are candidates for supporting porcine SSC self-renewal, and there are various types of agar powder that can be used. In this study, we sought to identify an agar-based 3D hydrogel system that exhibited strong efficacy in the maintenance of porcine SSC self-renewal. First, 3D hydrogels with different mechanics were prepared with various concentrations of Bacto agar, lysogeny broth (LB) agar, and agarose powder, and the 3D hydrogel with the strongest alkaline phosphatase (AP) activity and greatest increase in colony size was identified for the different types of agar powder. Second, among the porcine SSCs cultured in the different 3D hydrogels, we analyzed the colony formation, morphology, and size; AP activity; and transcription and translation of porcine SSC-related genes, and these were compared to determine the optimal 3D hydrogel system for the maintenance of porcine SSC self-renewal. We found that 0.6% (w/v) Bacto agar-, 1% (w/v) LB agar-, and 0.2% (w/v) agarose-based 3D hydrogels showed the strongest maintenance of AP activity and the most pronounced increase in colony size in the culture of porcine SSCs. Moreover, among these hydrogels, the strongest transcription and translation of porcine SSC-related genes and largest colony size were detected in porcine SSCs cultured in the 0.2% (w/v) agarose-based 3D hydrogel, whereas there were no significant differences in colony formation and morphology. These results demonstrate that the 0.2% (w/v) agarose-based 3D hydrogel can be effectively used for the maintenance of porcine SSC self-renewal.

In recent 10 years, mushroom cultivation area and number of cultivators have decreased, but mushroom production tends to increase. This shows that mushroom cultivation is being transformed from log and bed cultivation to bottle cultivation using automated facilities with high productivity per unit area. The bottle cultivation is possible to mechanized and automated, which can save manpower, less damage to pests, can be cultivated throughout the year, and is uniform in quality and advantageous for mass production. However, the investment in production facilities and farm materials is very large compared to the production of logs and bed cultivars, which can lead to large losses in the case of failure to grow. Therefore, it is necessary for the farmers who want to start the bottle cultivation to make careful management decisions by carefully examining the investment cost, the operating cost, and the expected income that are put into the bottle cultivation system. This study was conducted to analyze the management performance of bottle cultivation in mushroom farm and use it as farming decision making data. As a result of analysis of the management performance through farmers' survey, it was found that such as cost of spawn, substrate materials, other material, employment effort, and fuels & electricity power cost accounted for a large proportion of the cost of bottle cultivation.