http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Shuhan Chen (검색결과 4 건)
- 무료
- 기관 내 무료
- 유료
-
Chen, Huchen,Zhang, Shuhan,He, Shengnan,A, Runa,Wang, Mingyang,Liu, Shouan The Korean Society of Ginseng 2022 Journal of Ginseng Research Vol.46 No.6
Background: Panax ginseng Meyer is one of the most valuable medicinal plants which is enriched in anti-microbe secondary metabolites and widely used in traditional medicine. Botrytis cinerea is a necrotrophic fungus that causes gray mold disease in a broad range of hosts. B. cinerea could overcome the ginseng defense and cause serious leaf and root diseases with unknown mechanism. Methods: We conducted simultaneous transcriptomic and metabolomic analysis of the host to investigate the defense response of ginseng affected by B. cinerea. The gene deletion and replacement were then performed to study the pathogenic gene in B. cinerea during ginseng - fungi interaction. Results: Upon B. cinerea infection, ginseng defense responses were switched from the activation to repression, thus the expression of many defense genes decreased and the biosynthesis of antifungal metabolites were reduced. Particularly, ginseng metabolites like kaempferol, quercetin and luteolin which could inhibit fungi growth were decreased after B. cinerea infection. B. cinerea quercetin dioxygenase (Qdo) involved in catalyzing flavonoids degradation and ∆BcQdo mutants showed increased substrates accumulation and reduced disease development. Conclusion: This work indicates the flavonoids play a role in ginseng defense and BcQdo involves in B. cinerea virulence towards the P. ginseng. B. cinerea promotes disease development in ginseng by suppressing of defense related genes expression and reduction of antifungal metabolites biosynthesis.
-
Botrytis cinerea hypovirulent strain BcSpd1 induced Panax ginseng defense
Shuhan Zhang,Junyou Han,Ning Liu,Jingyuan Sun,Huchen Chen,Jinglin Xia,Huiyan Ju,Shouan Liu 고려인삼학회 2023 Journal of Ginseng Research Vol.47 No.6
Background: Gray mold, caused by Botrytis cinerea, is one of the major fungal diseases in agriculture. Biological methods are preferred over chemical fungicides to control gray mold since they are less toxicto the environment and could induce the resistance to pathogens in plants. In this work, we try tounderstand if ginseng defense to B. cinerea could be induced by fungal hypovirulent strain △BcSpd1. BcSpd1 encodes Zn(II)2Cys6 transcription factor which regulates fungal pathogenicity and we recentlyreported △BcSpd1 mutants reduced fungal virulence. Methods: We performed transcriptomic analysis of the host to investigate the induced defense responseof ginseng treated by B. cinerea △BcSpd1. The metabolites in ginseng flavonoids pathway were determinedby UPLC-ESI-MS/MS and the antifungal activates were then performed. Results: We found that △BcSpd1 enhanced the ginseng defense response when applied to healthyginseng leaves and further changed the metabolism of flavonoids. Compared with untreated plants, theapplication of △BcSpd1 on ginseng leaves significantly increased the accumulation of p-coumaric acidand myricetin, which could inhibit the fungal growth. Conclusion: B. cinerea△BcSpd1 could effectively induce the medicinal plant defense and is referred to asthe biological control agent in ginseng disease management.
-
Zhenhua Zhou,Shuhan Chen,Xin Liu 한국자기학회 2020 Journal of Magnetics Vol.25 No.2
Negative stiffness element (NSE) has extensive uses in engineering applications, such as vibration isolation, energy harvesting, and mechanical metamaterial. However, to realize a linear negative stiffness characteristic is still a challenging task. In this paper, we present a compact magnetic negative stiffness element (MNSE) that composed of three rectangular permanent magnets and configured as repelling configuration in horizontal to realize linear negative stiffness characteristic. The effects of the MNSE configuration parameters on the negative stiffness characteristic are analyzed in detail. The results demonstrate that the magnitude of the negative stiffness characteristic can be adjusted by changing the height ratio and width ratio between the central and outer magnets. The height difference between the central and outer magnets can be used to tune the degree of nonlinearity of the negative stiffness characteristic and to get the uniformity stiffness characteristic in the equilibrium position. The procedure to realize the linear negative stiffness characteristic with the expected magnitude and displacement range is developed and confirmed. The proposed MNSE and the design procedure offer an engineering application foundation for the magnetic linear negative stiffness.
-
A Decade of Meituan-Dianping’s Development: What Makes a Brand Stands Out from The Crowd?
Guanxiu Lin,Shunshun Pang,Shuhan Wang,Chen Te-feng Academy of Asian Business (AAB) 2020 Academy of Asian Business Review Vol.6 No.1
Digitalization era offers a precious opportunity to the e-commerce industry, while it also manifests strong competition between continuously emerging enterprises. Meituan-Dianping is undoubtedly one of the fastest-growing IT companies in China. Within just eight years, it has grown into the largest local life service e-commerce platform, expanding its business margin from the initial group purchase to the “to C” (i.e. “to Customer”) service in the areas of catering, entertainment, travel, traffic, retail and related vertical “to B” (i.e. “to Business”) service. To explore the success secrets and distinct Asian-business features for an Asian company to stand out from the crowd, this study analyses Meituan-Dianping’s historical and current development strategies, which results in its current leading position in China’s e-commerce market. Through this study, we expect to provide applicable example for e-commerce startups, about the ingredients of how to accurately positioning company’s profile and segmenting the readily-saturated market. Meanwhile, the history of Meituan provides insights about the future development trend of China’s O2O market, which we believe can served as a reference for the companies under similar industry. The structure of the paper includes four major parts. The first part (Section.1-3) examines the transformation history and emphasizes the key turning points of Meituan-Dianping. The strategies and subsequent performance in each kick points are analyzed, including the competition at the beginning stage, the diversification during the transition stage and the product upgrading at the booming stage. The second part (Section.4) explores the success factors that Meituan-Dianping possessed in tough times under the devastating competition period, and examines how Meituan-Dianping exploited threats into opportunities during later stages. The comparison between Asian characteristics and Western styles are analyzed in the context of the markets they subordinate. The third part (Section.5) looks into the market conditions categorized in terms of the macroenvironment and microenvironment, using PEST model and Porter’s 5-forces model respectively. In the last part (Section.6-7), this paper generates recommendations for Meituan-Dianping’s future development, based on the previous external environment analysis, aiming at enhancing Meituan-Dianping’s existing competitive advantages.
DBpia
ScienceON연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
