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Seonyeong Kang,Su Min Bae,Jiye Yoon,Seung Hwa Gwak,Da Hun Jeong,Eunjin Yun,Minji Kang,Youngmin Heo,Jong Youn Jeong 한국식품영양과학회 2021 한국식품영양과학회 학술대회발표집 Vol.2021 No.10
This study was conducted to compare the quality characteristics of naturally cured ham prepared using various alternative methods for synthetic nitrite. The experiment groups included as follows: negative control (NC, non-added NaNO₂); positive control (PC, 0.01% NaNO₂); vegetable powder (VP, Chinese cabbage powder and starter culture); pre-converted solution (PCS, the VP was incubated for 6 h at 37℃); and pre-converted powder (PCP, freeze-dried PCS). The nitrate/nitrite levels added to the treatments except to NC were the same as PC. The pH was the highest (P<0.05) in VP among the treatments. VP, PCS, and PCP had lower (P<0.05) cooking loss than PC. CIE a* in PC, VP, and PCP was higher (P<0.05) than NC and PCS. Residual nitrite was the highest (P<0.05) in PC, while nitrosyl hemochrome and curing efficiency were the highest (P<0.05) in PCP and PCS, respectively. TBARS was not different (P>0.05) between PC and naturally cured treatments. Therefore, the use of various alternative methods, based on the sources of Chinese cabbage, to replace sodium nitrite in pork hams may offer promising means to produce similar qualities to products with synthetic nitrite.
Seonyeong Kang,Su Min Bae,Jiye Yoon,Seung Hwa Gwak,Da Hun Jeong,Eunjin Yun,Minji Kang,Youngmin Heo,Jong Youn Jeong 한국식품영양과학회 2021 한국식품영양과학회 학술대회발표집 Vol.2021 No.10
This study was to determine the effects of different nitrite sources and ligands on the development of cured meat color in pork sausage model system. Samples were assigned as 2×3 factorial, dependent on nitrite sources (50 ppm sodium nitrite and 0.25% white kimchi powder with 0.025% starter culture) and ligands (0.5% cysteine, 0.5% histidine, and 0.5% nicotinamide). Nitrite sources significantly affected (P<0.05) cooking loss, CIE L*, and residual nitrite. In particular, Samples with white kimchi powder had higher (P<0.05) cooking loss and lower (P<0.05) residual nitrite than those of sodium nitrite. Ligands had significant effects (P<0.05) on pH, CIE L*, nitrosyl hemochrome, and curing efficiency. Products containing cysteine showed the lowest (P<0.05) pH, but the highest (P<0.05) nitrosyl hemochrome and curing efficiency among ligands treated samples. Only a two-way interaction effect was found for CIE L*. Our study indicated that white kimchi powder showed similar color development in pork sausage model system comparable to synthetic sodium nitrite and the addition of cysteine had a positive effect on the development of cured meat color.
A Study on the Energy Self-Sufficiency of KIER Zero Energy Solar House II
정선영(Jeong, Seonyeong),백남춘(Baek, Namchoon),유창균(Yoo, Changkyoon),윤종호(Yoon, Jongho) 한국신재생에너지학회 2010 한국신재생에너지학회 학술대회논문집 Vol.2010 No.06
The purpose of this study is on the thermal performance evaluation of KIER Zero Energy Solar House-II, called ZeSH-II which can be sustained with the support of a very few energy. This ZeSH-II was designed and constructed in the end of 2009 to develop for the goal of 70% self-sufficiency. Several key technologies like as the super insulation, high performance window, wast heat recovery system as well as solar power and thermal system and geo-source heat pump wear used for this ZeSH-II. The monitering of ZeSH-II was conducted for six months from November 2009 to April 2010. The monthly energy consumption was calculated based on the monitering results. As a result, the ZeSH-II shows that the energy self-sufficiency during six months(from oct. to apr.) is about 80% which is higher than that of the target.
The Study on the Energy self-sufficiency and Economic Analysis of KIER Zero Energy Solar House
정선영(Jeong, Seonyeong),백남춘(Baek, Namchoon),유창균(Yoo, Changkyoon),윤응상(Yoon, Eungsang),윤종호(Yoon, Jongho) 한국신재생에너지학회 2010 한국신재생에너지학회 학술대회논문집 Vol.2010 No.11
In this study, the energy and economic analysis of KIER Zero Energy Solar House (KIER ZeSH) was carried out. KIER ZeSH was designed and constructed in the end of 2009 for the purpose of more than 70% energy self-sufficiency in total load as well as less than 20% of additional construction cost. The several building energy conservation technologies like as super insulation, high performance window, wast heat recovery system, etc and renewable energy system. The renewable heating and cooling system is a kind of solar thermal system combined with geo-source heat pump as a back-up device. The capacity of 3.15kW solar BIPV system was also installed on the roof. The measurement by monitering system of ZeSH was conducted for one year from November 2009 to October 2010. The energy self-sufficiency and economic analysis were conducted based on the this monitering result. As a result, the energy self sufficiency is about 83% which is higher than that of the target and the payback period is 11 years.
Da Hun Jeong,Su Min Bae,Jiye Yoon,Seung Hwa Gwak,Seonyeong Kang,Eunjin Yun,Minji Kang,Youngmin Heo,Jong Youn Jeong 한국식품영양과학회 2021 한국식품영양과학회 학술대회발표집 Vol.2021 No.10
This study evaluated the quality properties of naturally cured sausages with pre-converted vegetable solution (PCS) including two types of starter cultures. The PCS consisted of Chinese cabbage powder, starter culture, and water. As starter cultures, Staphylococcus hominis (SH) and Staphylococcus carnosus (SC) were used. Samples were included: negative control (NC, no NaNO₂); positive control (PC, 70 ppm NaNO₂); TRT 1 (6.29% PCS-SH, 35 ppm NaNO₂); TRT 2 (5.98% PCS-SC, 35 ppm NaNO₂); TRT 3 (12.50% PCS-SH, 70 ppm NaNO₂); and TRT 4 (11.89% PCS-SC, 70 ppm NaNO₂). TRTs 3 and 4 had the highest (P<0.05) cooking loss, probably due to lower (P<0.05) pH. However, All TRTs showed similar (P>0.05) CIE a* to PC. Although TRTs 3 and 4 contained the same concentration of NaNO₂ as PC, residual nitrite in PC was the highest (P<0.05), but they showed higher (P<0.05) nitrosyl hemochrome and curing efficiency than PC. Hardness, gumminess, and chewiness were increased (P<0.05) with the level of PCS. Consequently, the PCS levels may affect the cured color developments of naturally cured sausages, whereas types of starter cultures had limited effects.
Kim, Juhyun,Jeong, Seonyeong,Kertsburg, Alexis,Soukup, Garrett A.,Lee, Seong-Wook American Chemical Society 2014 ACS CHEMICAL BIOLOGY Vol.9 No.11
<P>Gene therapeutic approaches are needed that can simultaneously induce the well-controlled expression of therapeutic genes and suppress the expression of disease-causing genes for maximization of their efficacy. To address this challenge, we designed an allosteric ribozyme that comprises a <I>Tetrahymena</I> group I-based trans-splicing ribozyme as an active domain for RNA replacement, a small molecule-specific RNA aptamer as a sensor domain, and a communication module as an active transfer domain. The effectiveness of this approach was assessed by constructing various ribozymes in combination with a theophylline-binding aptamer to identify an allosteric ribozyme, which is controlled by theophylline both <I>in vitro</I> and in cells. Moreover, we constructed adenoviral vectors encoding the ribozymes and validated allosteric regulation of trans-gene expression via theophylline-dependent RNA replacement in target RNA-expressing cells. Results demonstrate that an allosteric trans-splicing ribozyme is an applicable RNA-based framework for engineering external ligand-controlled gene expression regulatory systems that exhibit adjustable regulation, design modularity, and target specificity.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/acbcct/2014/acbcct.2014.9.issue-11/cb500567v/production/images/medium/cb-2014-00567v_0005.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/cb500567v'>ACS Electronic Supporting Info</A></P>
Feasibility Study of Polymer Gel Dosimetry Using a 3D Printed Phantom for Liver Cancer Radiotherapy
Minsik Lee,Seonyeong Noh,KyoungJun Yoon,Sang-Wook Lee,Sang Min Yoon,Jinhong Jung,Chiyoung Jeong,Jungwon Kwak 한국물리학회 2020 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.76 No.6
In this study, a new three-dimensional (3D) volumetric dosimetry method utilizing gel dosimetry with a patient-specific (PS) 3D-printed phantom was developed. A PS 3D-printed phantom that closely mimics the actual tumor and surrounding tissues was demonstrated using a 3D printer (3Dison Plus, Lokit, Korea). MAGAT normoxic polymer gel was filled in the tumor-shaped cavity of the 3D-printed phantom to represent the real tumor. Seven identical gel samples for dosimetric calibration were irradiated at different doses and scanned using magnetic resonance imaging. A chlorinated polyethylene filament was utilized as the 3D printing material. The two-dimensional gamma passing rates using the film were 96.1% and 84.3% for the 3%/3 mm and the 2%/1 mm dose accuracy/distance-to agreement criteria, respectively. The radiation dose-R2 (relaxation rate) calibration, with a coefficient of determination (R2) of 0.997, was applied for the absolute dose calibration. The overall gross tumor volume shape and the dose distribution of the gel measurement agreed reasonably well with the plan results. The 3D gamma passing rate was 91.2% for the 3%/3 mm criteria and decreased to 82.3% for the 2%/1 mm criterion. Our results suggest that polymer gel dosimetry with the 3D-printed phantom allows direct validation of the 3D dose distribution.