• Proceedings of the Korean Nuclear Society Conference
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• 2002.05a
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• pp.56.1-56
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• 2002

• International Journal of Industrial Entomology and Biomaterials
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• v.41 no.2
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• pp.28-35
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• 2020

Entomopathogenic Beauveria bassiana and Metarhizium anisopliae are well-known biological control agents worldwide, and have high potential in industrialization. However, their thermo-susceptibility limits long-term storage under high temperature conditions and insecticidal activity after application in target pests. The virulences of M. anisopliae JEF-003 and JEF-004, and B. bassiana JEF-006 and JEF-007 against bean bug (Riptortus pedestris), and the thermotolerance of conidia produced on three kinds of grains, sorghum, millet and Italian millet as substrates for solid cultures were investigated. Of the three grains, Italian millet was the suitable grains in the production of thermotolerant conidia, and a significant relationship between conidial thermotolerance and the media was demonstrated. This work suggests that biological characteristics of entomopathogenic fungi are altered by culture media, and these results will be a chance to understand the factors in the media which make such changes.

• Mycobiology
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• v.48 no.2
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• pp.139-147
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• 2020

Root-feeding Scarabaeidae, particularly white grubs are considered among the most harmful coleopteran insect pests in turfgrass. In this work, sixteen entomopathogenic fungal species were assayed against flower chafer beetle, Protaetia brevitarsis (Coleoptera: Scarabaeidae) and Metarhizium anisopliae JEF-314 showed high virulence. The control ability of the isolate JEF-314 has been in detail tested for a model insect flower chafer beetle. Further analyses showed insect stage-dependent virulence where the fungal virulence was the highest against smaller instar larvae. Additionally, we confirmed that millet-based solid cultured granule was effective against the soil-dwelling larval stage. The isolate also showed a similar ability for a representative pest (Popillia spp.) in laboratory conditions. Our results clearly suggest a high potential of M. anisopliae JEF-314 to control the flower chafer beetle, possibly resulting in controlling of root-feeding white grubs in turfgrass. Based on the insect life cycle and susceptibility to the fungus, late spring and summer time would be the optimum time to apply JEF-314 granules for an effective control. Further characterization of the efficacy of the fungus under field conditions against the Scarabaeidae beetles might provide an efficient tool to control this beetle in an environment-friendly way.

• Proceedings of the Korean Nuclear Society Conference
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• 2001.05a
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• pp.82-82
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• 2001

• The Journal of the Korea Contents Association
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• v.4 no.2
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• pp.76-82
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• 2004

The thermal neutron capture cross-section (at 2,200 m/s value) of the $^{141}$Pr(n,$\gamma$)$^{142}$Pr reaction was measured by an activation method by using the heavy water ($D_2$O) thermal neutron facility at the KUR(Kyoto University Reactor). The thermal neutron fiux used in this experiment was monitored with the$^{197}$Au(n,$\gamma$)$^{198}$Au standard cross-section. The previous results and the evaluated data of JENDL-3.2, ENDF/B-VI, and JEF-2.2 were in good agreement with the current result.

• Nuclear Engineering and Technology
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• v.50 no.1
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• pp.35-42
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• 2018

This article presents clean core criticality calculations and control rod worth calculations for TRIGA (Training, Research, Isotope production-General Atomics) Mark II research reactor benchmark cores using Winfrith Improved Multi-group Scheme-D/4 (WIMS-D/4) and Program for Reactor In-core Analysis using Diffusion Equation (PRIDE) codes. Cores 133 and 134 were analyzed in 2-D (r, ${\theta}$) and 3-D (r, ${\theta}$, z), using WIMS-D/4 and PRIDE codes. Moreover, the influence of cross-section data was also studied using various libraries based on Evaluated Nuclear Data File (ENDF/B-VI.8 and VII.0), Joint Evaluated Fission and Fusion File (JEFF-3.1), Japanese Evaluated Nuclear Data Library (JENDL-3.2), and Joint Evaluated File (JEF-2.2) nuclear data. The simulation results showed that the multiplication factor calculated for all these data libraries is within 1% of the experimental results. The reactivity worth of the control rods of core 134 was also calculated with different homogenization approaches. A comparison was made with experimental and reported Monte Carlo results, and it was found that, using proper homogenization of absorber regions and surrounding fuel regions, the results obtained with PRIDE code are significantly improved.

• Proceedings of the Korean Nuclear Society Conference
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• 1997.10a
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• pp.185-190
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• 1997

고속로 검증실험의 2차원 상세해석을 MATXS형 라이브러리와 TWODANT를 이용하여 수행하였다. 80군자료를 2차원 coarse mesh 계산으로 생산된 중성자속을 가중함수로하여 25군으로 축약하고, P$_3$S$_{8}$, 2차원 R-Z모델로 임계도 및 중심반응률비를 계산하여 실험값과 비교하였다. 이 과정에서 ENDF/B-VI$_3$, JEF-2.2 그리고 JENDL-3.2 라이브러리를 상호 비교, 검토하였다.

• Proceedings of the Korean Nuclear Society Conference
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• 1998.05a
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• pp.163-168
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• 1998

경수로 압력용기의 취화는 주로 고속 중성자에 기인한다. 경수로 압력용기를 모의한 PCA-REPLICA실험을 해석하여 원자력 시설의 구조재로 쓰이는 철의 핵자료 검증과 MATXS/TRANSX/DANTSYS 계산체제의 유용성을 확인하고자 하였다. 라이브러리는 JEF-2.2를 이용한 KAFAX-F22가 기본 자료로 이용되었고, 이밖에 ENDF/B-Vl.1과 JENDI.-3.2의 철 핵자료도 비교 검증하였다. 계산결과는 실험오차 등을 고려하면 측정치와 근접하는 경향을 보였고, 앞으로 개발될 차폐해석용 라이브러리 검증에 유용한 자료가 될 수 있겠다.

• Microbiology and Biotechnology Letters
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• v.42 no.2
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• pp.106-113
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• 2014

For the development of high value consumables utilizing jujube and grape, we investigated the biological activities of a variety of existing fermentation products of jujube and grape. The results revealed that ethanol fermentation products of jujube and grape had a higher antioxidative activity than acetic acid fermentation products. In addition, the ethanol fermentation products of jujube (JEF) had the highest antioxidative activity, with it being greater than that of the ethanol fermentation products of grape (GEF), the acetic acid fermentation products of jujube (JAF) and the acetic acid fermentation products of grape (GAF). As regards tests on whitening effects, JEF exhibited the highest tyrosinase inhibition effects amongst the test groups. However, when immunofluorecence was employed, JAF was seen to inhibit the expression of proteins related to the whitening effect. In the lipopolysaccharide-stimulated mode peritoneal macrophage model, all tested groups of fermentation products (JEF, GEF, JAF and GAF) suppressed nitric oxide production dose-dependently, with ethanol fermentation products demonstrating a higher nitric oxide expression inhibition effect than acetic acid fermentation products. When subjected to antibacterial activity tests, GAF exhibited antibacterial activity against all tested strains except Propionibacterium acnes. Both GAF and JEF revealed high antibacterial activity against Escherichia coli.

• The Journal of the Korea Contents Association
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• v.5 no.5
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• pp.133-139
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• 2005

The neutron capture cross section of $^{99}Tc$ has been measured relative to the $^{10}B(n,\gamma)$ standard cross section by the neutron time-of-flight(TOF) method in the energy range of 0.007 eV to 47 keV using a 46-MeV electron linear accelerator(linac) at the Research Reactor. Institute, Kyoto University(KURRI). In order to experimentally prove the result obtained, the supplementary cross section measurement has been made from 0.3 eV to 1 keV using the Kyoto University Lead stowing-down spectrometer (KULS) coupling to the linac. The relative measurement by the TOF method has been normalized to the reference value(20.01 b) at 0.0253 eV and the KULS measurement to that by the TOF method. The existing experimental data and the evaluated capture cross sections in ENDF/B-VI, JENDL-3.2, and JEF-2.2 have been compared with the current measurements by the linac TOF and the KULS experiments.