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( Yeonju Jung ),( Yoon C. Cho ) 서암순창장학회 2017 Journal of Marketing Thought Vol.4 No.3
The sharing economy, facilitated by the development of information technology plays a crucial role in our society by providing benefits but with various concerns. The market of the sharing economy has grown explosively in recent years, so related studies have also gradually increased (Kim and Cho, 2016). By classifying existing and potential users, the purpose of this study is to examine i) how utilities such as transaction, social, sustainability, technology, the economy, and trust affects attitude; ii) how attitude affects satisfaction and intention to use; iii) how satisfaction affects loyalty; and iv) how intention to use affects the expected satisfaction of sharing accommodations. This study collects data through a survey and applies quantitative analyses such as factor, regression, and ANOVA. The results reveal that there are different effects for existing and potential users. This study provides theoretical, managerial, and policy implications for future analysis of the relationship between perceived utilities and customers’ attitudes.
Evaluation of Fusarium Head Blight and Grain Properties in Korean Wheat Cultivars and Advanced Lines
Yeonju Jung,Chul Soo Park,Ji-Ung Jeung,Yong-Won Seo,Myung-Chul Lee,Jung-Gon Kim 한국작물학회 2010 한국작물학회 학술발표대회 논문집 Vol.2010 No.04
Fusarium head blight (FHB), also known as head scab of wheat causes serious yield losses and deteriorated grain and may also contaminate the grain with mycotoxins. Many researches have been conducted to minimize damage caused by FHB and to improve resistance to FHB in many countries. However, little information of FHB in Korean wheats is available. In this study, 23 Korean wheat cultivars and F8 population were evaluated FHB symptoms infected two types of inoculations, both spray and point inoculation. Grain properties of Korean wheat cultivars, including grain morphology, antioxidant activity and ion content, were also evaluated to elucidated the relationship to the degree of infection of FHB. Anbaek, Eunpa and Milsung showed lower degree of infection by spray inoculation than any other cultivars, in spite of higher infection degree than Sumai3, which have been known as resistant to FHB. The degree of infection by point inoculation of Milsung, Gobun and Olgeuru was comparable to that of Sumai3. Poly phenol oxidase activity and total polyphenol content negatively correlated with the degree of infection by spray inoculation (r = -0.388, r = -0.466* respectively). Roundness of grain positively correlated with the degree of infection by point inoculation (r = 0.419*). In F8 population of 234 lines derived from the cross between Sumai3 and Korean wheat cultivar, 33 lines (14.1%) showed lower degree of infection by spray inoculation than parental cultivars, although there was no line comparable resistance of FHB to Sumai3. Fourteen lines (6.0%) showed lower degree of infection by point inoculation than Sumai3 and 135 lines (57.6%) were comparable to Sumai3 and parental cultivars.
Marker Assistant Evaluation of Fusarium Head Blight Resistance in Korean Wheat Cultivars
Yeonju Jung,Chul Soo Park,Ji-Ung Jeung,Yong-Won Seo,Myung-Chul Lee,Jeong-Ran Lee,Gi-An Lee,Jung-Gon Kim 한국작물학회 2010 한국작물학회 학술발표대회 논문집 Vol.2010 No.04
Fusarium head blight (FHB) is the most important disease of wheat that may cause serious yield and quality losses and leads to harmful contamination of the grain with fungal toxins. Korean wheat cultivars showed much less resistant to FHB than Sumai3, which known as resistance to FHB, evaluated by spray inoculation in our companion report. Many DNA-marker studies, including sequence tagged site (STS) and simple sequence repeat (SSR) markers and qualitative trait loci (QTL) associated with FHB resistance have been identified and mapped on the specific chromosome, especially 3BS, by many previous studies. However, there was no application of DNA-markers to select FHB resistance lines in Korean wheat breeding programs. 3 SSR markers and 6 STS markers linked to major QTL on chromosome arms 3BS found in Sumai3 and its derivatives were used to screen FHB resistance in Korean wheat cultivars. All markers known to be most significant markers based on previous research (Liu and Anderson 2003). There was general lack of marker polymorphism for Korean wheat cultivars used in this study. However, STS3B-138 marker only showed the polymorphism in Korean wheat cultivars. Allele size of STS3B-138 is 355 bp in Sumai 3 and 12 of 24 cultivar showed this allele. The range in Type II resistance rating was 1-5 and average of these 12 cultivars have 355bp allele was grade 2.4. The most resistant cultivars under the 2 grade, Gobun, Jinpoom, Milseong and Namhae also showed 355bp allele. Therefore, These results provide potential for development of wheat cultivars with improved Fusarium head blight resistance through use of effective FHB screen methods and marker - assisted selection.
Phenotypic and Marker Assisted Evaluation of Korean Wheat Cultivars
Yeonju Jung,Chul Soo Park,Ji-Ung Jeung,Chon-Sik Kang,Gi-An Lee,Yu-Mi Choi,Jung-Ro Lee,Myung-Chul Lee,Chung- Kon Kim,Yong Weon Seo 한국육종학회 2011 한국육종학회지 Vol.43 No.4
Fusarium head blight (FHB), also known as scab, caused mainly by Fusarium graminearum is a devastating disease of wheat in regions that are warm and humid during flowering. In addition to significant yield and quality losses, the mycotoxin deoxynivalenol produced by the pathogen in infected wheat kernels is a serious problem for food and feed safety. Twenty- three Korean cultivars and “Sumai 3”, which is a FHB-resistant Chinese cultivar were tested for Type I, Type II resistances of FHB. Three cultivars were identified as resistant in Type I assessment, and two cultivars were resistant in Type II assessment. Genetic variation and relationship among the cultivars were evaluated on the basis of 11 Simple Sequence Repeat (SSR) and 29 Sequence Tagged Site (STS) markers that were linked to FHB resistance Quantitative Trait Loci (QTL) on chromosome 3BS. One SSR and 7 STS markers detected polymorphisms. Especially, using a STS marker (XSTS3B-57), 32.4% of the variation for Type II FHB resistance could be explained. Genetic relationship among Korean wheat cultivars was generally consistent with their released year. These markers on chromosome 3BS have the potential for accelerating the development of Korean wheat cultivars with improved Fusarium head blight resistance through the use of marker-assisted selection.
Formation mechanism of BAMLET by 2D Raman correlation analysis
Park, Yeonju,Park, Yujeong,Jin, Sila,Kim, Jung Won,Jung, Young Mee Elsevier 2018 Journal of molecular structure Vol.1171 No.-
<P><B>Abstract</B></P> <P>A partially unfolded bovine α-lactalbumin (ALA) and oleic acid (OA) complex called bovine α-lactalbumin made lethal to tumor cells (BAMLET) is a tumoricidal complex. For the first time, this study investigated the pH-induced formation mechanism of the ALA/OA complex using Raman spectroscopy. For a deeper understanding of the formation mechanism of the ALA/OA complex with decreasing pH, principal component analysis (PCA) and two-dimensional correlation spectroscopy (2D-COS) were applied to pH-dependent Raman spectra of the ALA/OA complex. Based on the results of the PCA and 2D-COS analyses, we successfully elucidated the formation mechanism of the ALA/OA complex at the molecular level. We also confirm that the ALA/OA complex formed below pH 3.0.</P> <P><B>Highlights</B></P> <P> <UL> <LI> For the first time, we investigated the pH-induced formation mechanism of the α-lactalbumin/oleic acid (ALA/OA) complex using Raman spectroscopy. </LI> <LI> We successfully elucidated the formation mechanism of the ALA/OA complex at the molecular level. </LI> <LI> Results of the PCA and 2D-COS analyses showed the ALA/OA complex formed below pH 3.0. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>