• 한국축산식품학회지
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• 제44권1호
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• pp.189-203
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• 2024

This study investigated the antioxidant activity of radish seed oil (RSO) and its effects on the quality and storage characteristics of pork patties. To assess the antioxidant capacity of RSO, this study analyzed fatty acid composition, peroxide value (PV), and 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity. Pork patties were manufactured with the addition of RSO-0.4%, 0.8%, 1.6%, and 2.4%-and measured in terms of proximate composition, pH, water holding capacity (WHC), cooking loss (CL), color, texture profile analysis, and a sensory evaluation. Total microbial count (TMC), volatile basic nitrogen (VBN), thiobarbituric acid reactive substances (TBARS), and PV were measured at 1, 3, and 7 days of refrigerated storage. The DPPH radical scavenging activity of RSO was found to be 75.46%. In the cases of WHC and CL, there was no significant differences observed between RSO0.4%, RSO0.8%, and positive control (PC; p>0.05). Meanwhile, RSO2.4% showed significantly lower hardness, springiness, gumminess, and chewiness than PC (p<0.05), and these values tended to decrease with the addition of increasing RSO. In terms of storage characteristics, with an increase in the amount of RSO added, TMC, VBN, TBARS, and PV all decreased; among the treatment groups, RSO2.4% showed the lowest values. In conclusion, RSO exhibits antioxidant activity, but when added in large amounts, it negatively affects the quality characteristics of patties while positively impacting their storage properties, thus necessitating a balanced consideration of both outcomes. Therefore, adding 1.6% RSO is considered to be the most appropriate level for formulations to be used in practice.

• ETRI Journal
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• 제34권6호
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• pp.962-965
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• 2012

In this letter, we propose a new RESURF stepped oxide (RSO) process to make a semi-superjunction (semi-SJ) trench double-diffused MOSFET (TDMOS). In this new process, the thick single insulation layer ($SiO_2$) of a conventional device is replaced by a multilayered insulator ($SiO_2/SiN_x/TEOS$) to improve the process and electrical properties. To compare the electrical properties of the conventional RSO TDMOS to those of the proposed TDMOS, that is, the nitride_RSO TDMOS, simulation studies are performed using a TCAD simulator. The nitride_RSO TDMOS has superior properties compared to those of the RSO TDMOS, in terms of drain current and on-resistance, owing to a high nitride permittivity. Moreover, variations in the electrical properties of the nitride_RSO TDMOS are investigated using various devices, pitch sizes, and thicknesses of the insulator. Along with an increase of the device pitch size and the thickness of the insulator, the breakdown voltage slowly improves due to a vertical field plate effect; however, the drain current and on-resistance degenerate, owing to a shrinking of the drift width. The nitride_RSO TDMOS is successfully fabricated, and the blocking voltage and specific on-resistance are 108 V and $1.1m{\Omega}cm^2$, respectively.

• 전기학회논문지
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• 제57권10호
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• pp.1818-1821
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• 2008

Several off-line diagnostic tests which include the insulation resistance(IR), polarization index(PI), low-voltage AC, and recurrent surge oscillograph(RSO) tests were performed to assess the condition of generator rotor windings. The low-voltage AC and the RSO tests were performed on the gas turbine generator rotor winding to detect shorted turns. Before intentionally applying artificial shorted faults, it was confirmed by the low voltage AC and the RSO tests that the winding was in sound condition. For simulated shorted rotor winding turns, the RSO test detected the fault in the winding. The RSO test was capable of identifying the number and pole location of the shorted turns for a number of simulated shorted coils.

• 전기학회논문지
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• 제60권8호
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• pp.1555-1559
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• 2011

Turbine generator(13.8 kV, 137.5 MW) has high bearing vibration at rotation speed. Shorted turns in generator rotor windings have strong correlation with increased field current which is thus related to increase in bearing vibration. The recurrent surge oscillograph (RSO) test is performed on the rotor winding in turbine generator to detect shorted turns. The result of the RSO test indicates that shorted turns of rotor winding are generated in two locations. The RSO test was capable of identifying the presence, number, and location of shorted turns in generator rotor windings.

• ETRI Journal
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• 제35권3호
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• pp.425-430
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• 2013

In this paper, we propose a triple-gate trench power MOSFET (TGRMOS) that is made through a modified RESURF stepped oxide (RSO) process, that is, the nitride_RSO process. The electrical characteristics of TGRMOSs, such as the blocking voltage ($BV_{DS}$) and on-state current ($I_{D,MAX}$), are strongly dependent on the gate configuration and its bias condition. In the nitride_RSO process, the thick single insulation layer ($SiO_2$) of a conventional RSO power MOSFET is changed to a multilayered insulator ($SiO_2/SiN_x/TEOS$). The inserted $SiN_x$ layer can create the selective etching of the TEOS layer between the gate oxide and poly-Si layers. After additional oxidation and the poly-Si filling processes, the gates are automatically separated into three parts. Moreover, to confirm the variation in the electrical properties of TGRMOSs, such as $BV_{DS}$ and $I_{D,MAX}$, simulation studies are performed on the function of the gate configurations and their bias conditions. $BV_{DS}$ and $I_{D,MAX}$ are controlled from 87 V to 152 V and from 0.14 mA to 0.24 mA at a 15-V gate voltage. This $I_{D,MAX}$ variation indicates the specific on-resistance modulation.

• 한국식품영양학회지
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• 제7권3호
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• pp.192-202
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• 1994

The fatty acid composition of a rapeseed oil being on the market was analyzed and the effect on gain of the body weight and lipid levels in serum and liver tissue of male rats of Sprague-Dawely strain fed the diet containing the rapeseed oil were studied. The fatty acid components of marketed rapeseed oil was oleic acid 29.4%, erucic acid 26.52%, linoleic acid 20.39% and linolenic acid 8.68%. The contents of total lipid in serum W3S Significantly higher in RSO20 group than Contr01 group(P< 0.01) . But that in the liver tissue did 001 show significant differences. The contents of triglyceride in serum was control group 84.14mg/dll, RSO15 group 100.33mg 141 and RSO20 group 122.00mg 141 and showed significant difference between each group, but that in the livertissue did not show significant differences. The contents of phospholipid in serum did not show significant differences. But that in the liver tissue showed significant difference between the control group 8.42mg /g and Rs02o group 7.34mg /g(p<0.001). The contents of total-cholesterol and free-cholesterol in serum and liver tissue of the RSO20 group showed the highest levels compared with control group, but there did not show significant differences. The contents of ester-cholesterol in serum showed significant.

• The Plant Pathology Journal
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• 제36권1호
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• pp.43-53
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• 2020

Ralstonia solanacearum (Rso) is a causal agent of bacterial wilt in Solanaceae crops worldwide including Republic of Korea. Rso virulence predominantly relies on type III secreted effectors (T3Es). However, only a handful of Rso T3Es have been characterized. In this study, we investigated subcellular localization of and manipulation of plant immunity by 8 Rso T3Es predicted to harbor a nuclear localization signal (NLS). While 2 of these T3Es elicited cell death in both Nicotiana benthamiana and N. tabacum, only one was dependent on suppressor of G2 allele of skp1 (SGT1), a molecular chaperone of nucleotide-binding and leucine-rich repeat immune receptors. We also identified T3Es that differentially regulate flg22-induced reactive oxygen species production and gene expression. Interestingly, several of the NLS-containing T3Es translationally fused with yellow fluorescent protein accumulated in subcellular compartments other than the cell nucleus. Our findings bring new clues to decipher Rso T3E function in planta.

• 대한화학회지
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• 제18권3호
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• pp.171-174
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• 1974

Sulfonyl chloride $ RSO_2Cl,\;R=C6H_5-,\;CH3-,\;OCH3-$ 및 $(CH_3)_2N-$에 대하여 EHT계산을 하였으며 바닥상태의 전자구조 특성과 $S_N$반응성을 논의하였다. 특히 $R=OCH_3$의 경우 Buncel이 제안한 Cl에서의 치환가능성을 검토하였다.

• Journal of Microbiology and Biotechnology
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• 제27권4호
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• pp.791-807
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• 2017

The type II secretion system (T2SS), which transports selected periplasmic proteins across the outer membrane, has rarely been studied in nonpathogens or in organisms classified as Betaproteobacteria. Therefore, we studied Cupriavidus metallidurans (Cme), a facultative chemilithoautotroph. Gel analysis of extracellular proteins revealed no remarkable differences between the wild type and the T2SS mutants. However, enzyme assays revealed that native extracellular alkaline phosphatase is a T2SS substrate, because activity was 10-fold greater for the wild type than a T2SS mutant. In Cme engineered to produce three Ralstonia solanacearum (Rso) exoenzymes, at least 95% of their total activities were extracellular, but unexpectedly high percentages of these exoenzymes remained extracellular in T2SS mutants cultured in rich broth. These conditions appear to permit an alternative secretion process, because neither cell lysis nor periplasmic leakage was observed when Cme produced a Pectobacterium carotovorum exoenzyme, and wild-type Cme cultured in minimal medium secreted 98% of Rso polygalacturonase, but 92% of this exoenzyme remained intracellular in T2SS mutants. We concluded that Cme has a functional T2SS despite lacking any abundant native T2SS substrates. The efficient secretion of three foreign exoenzymes by Cme is remarkable, but so too is the indication of an alternative secretion process in rich culture conditions. When not transiting the T2SS, we suggest that Rso exoenzymes are probably selectively packaged into outer membrane vesicles. Phylogenetic analysis of T2SS proteins supports the existence of at least three T2SS subfamilies, and we propose that Cme, as a representative of the Betaproteobacteria, could become a new useful model system for studying T2SS substrate specificity.

• 한국산학기술학회논문지
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• 제19권3호
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• pp.655-661
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• 2018

본 연구는 국내 식물자원을 이용한 압착 오일의 화장품소재로서 항산화 활성 평가를 실시하였다. 4종류의 종실에서 기름을 착유하여 gas chromatography mass spectrometry(GCMS)로 지방산 성분 분석을 비교하고 항산화 활성을 확인하기 위해 DPPH radical scavenging과 ABTS radical cation decolorization 활성을 측정하였다. 호박씨 오일, 동백씨 오일, 땅콩 오일은 불포화지방산이 포화지방산 보다 높은 비율을 보였으며, 열처리 후에도 고추씨 오일을 제외하고는 불포화지방산이 포화지방산보다 높은 비율을 차지했다. DPPH에서 고추씨 오일은 농도 $200{\mu}{\ell}/m{\ell}$에서 87.84%의 가장 높은 항산화 활성을 보였고, 호박씨 오일, 땅콩오일 그리고 동백씨 오일은 $1000{\mu}{\ell}/m{\ell}$에서 각각 75.20%, 74.16%, 43.18%의 가장 높은 활성을 나타냈다. ABTS에서는 고추씨 오일은 농도 $200{\mu}{\ell}/m{\ell}$에서 76.72%의 가장 높은 항산화 활성을 보였고, 호박씨 오일, 땅콩 오일 그리고 동백씨 오일은 $1000{\mu}{\ell}/m{\ell}$에서 각각 76.25%, 73.34%, 41.26%로 가장 높은 활성을 나타냈다. 양성대조군인 올리브 오일과 비교하여 DPPH에서는 고추씨 오일, 호박씨 오일 그리고 땅콩 오일이 대조군 보다 높은 항산화 활성을 보였고, ABTS에서는 고추씨 오일, 호박씨 오일이 높은 항산화 활성을 보였다. 열처리 후 항산화 활성능력은 근소한 차이를 보여, 본 연구를 통해 4종의 오일은 화장품 용 소재로서 유용하게 활용 될 수 있는 가능성을 가진 것으로 평가되었다.