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Search Results: 1 - 10 of 44131 matches for " Xiaodan Wu "
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The Benefits of Exogenous NO: Enhancing Arabidopsis to Resist Botrytis cinerea  [PDF]
Hongyu Yang, Xiaodan Zhao, Jia Wu, Min Hu, Shaolei Xia
American Journal of Plant Sciences (AJPS) , 2011, DOI: 10.4236/ajps.2011.23060
Abstract: Botrytis cinerea is a necrotrophic fungal pathogen that impacts a wide range of hosts, including Arabidopsis. Pretreatment with nitric oxide (NO) donor sodium nitroprusside (SNP) on Arabidopsis leaves suppressed Botrytis cinerea infection development. Additionally, in this study the dosage levels of SNP applied to the leaves had no direct, toxic impact on the development of the pathogen. The relationship between NO and reactive oxidant species (ROS) was studied by using both spectrophotometrical methods and staining leaf material with fluorescent dyes, nitro blue tetrazolium (NBT), and with 3,3-diaminobenzidine (DAB). The results showed that exogenous NO restrained the generation of ROS, especially H2O2, as the pathogen interacted with the Arabidopsis plant. And this inhibition of reactive oxidant burst coincided with delay infection development in NO-supplied leaves. The influence of elevated level of NO on antioxidant enzymes was investigated in this study. The activities of catalase (CAT) and guaiacol peroxidase (POD) were increased to different degrees in both: 1) SNP treated only leaves, and 2) SNP pretreated leaves that were subsequently inoculateted with pathogens. However, the activity of superoxide dismutase (SOD) was unchanged in the leaves studied. The decrease in H2O2 content probably resulted from the increase in activities of POD and CAT. Our study suggests that NO might trigger some metabolic reactions, i.e. enhanced enzyme activity that restrains H2O2 which ultimately results in resistance to B. cinerea infection.
The Change of Heterosexual Preference in Adolescents: Implications of Stress and Cognitive Regulation on Sexual Orientation  [PDF]
Binggen Zhu, Xiaodan Ren, Jing Cao, Yujie Wu, Rongshen Zhu
Open Journal of Social Sciences (JSS) , 2013, DOI: 10.4236/jss.2013.16004
Abstract: Sexual orientation is a complex area. It is unclear to date how people precisely establish their preferred sexual objects. This paper presents two cases, whose heterosexual preference were changed in late adolescent age after a severe psychological event, to draw attention to the study of the possible underlying mechanism. Case 1, one identical male twin, was seriously punished at age 12 years, as he loved a girl in his classroom. Afterwards, he feared to contact with girls, and became attracted to young men at age 17 years, and kept same-sex sexual behaviors since then. However, his twin brother is always heterosexual. Case 2, a girl at age 16 years, was unexpectedly betrayed by her boyfriend, she bore great pain and distress in the beginning. Since then, she had a definite opinion that men were unbelievable, and gradually turned her heterosexual preference and had same-sex sexual behaviors with a girl classmate more than 3 years. Our case presentation indicates that severe frustration of primary heterosexual desires or behaviors and the successive cognitive regulation might lead susceptible adolescents into reorienting their sexual preference. The role of prefrontal cortex and related neuromodulatory pathways were discussed.
Isolation and Identification of Two Novel Attractant Compounds from Chinese Cockroach (Eupolyphaga sinensis Walker) by Combination of HSCCC, NMR and CD Techniques
Wei Jiang,Xiaodan Wu,Bin Wu
Molecules , 2013, DOI: 10.3390/molecules180911299
Abstract: High-speed counter-current chromatography (HSCCC) with a two-phase solvent system composed of n-hextane-ethyl acetate-methanol-water (1.5:1:1.5:1, v/v/v/v) was applied to the isolation and purification of attractants from Chinese cockroach, Eupolyphaga sinensis Walker. Two new attractants with attractant activity towards the male insects were obtained from the extract sample in a one-step separation. Their purities were determined by HPLC. Subsequent MS, NMR and CD analyses have led to the characterization of ( R)-3-ethyl-6,8-dihydroxy-7-methyl-3,4-dihydroisochromen-1-one ( 1) and ( R)-6,8-dihydroxy-3,7-dimethyl-3,4-dihydroisochromen-1-one ( 2), two novel isocumarin type attractants. Based on these results, it is concluded that HSCCC is a viable separation method option for purifying insect attractants, while effectively maintaining the attracting activity of the isolates. This is the first attempt to apply counter-current chromatography technique to separate attractants from Chinese cockroach.
Corporate Social Responsibility Disclosure, Political Connection and Tax Aggressiveness: Evidence from China’s Capital Markets  [PDF]
Xiaodan Chen
Open Journal of Business and Management (OJBM) , 2018, DOI: 10.4236/ojbm.2018.61010
Abstract:
Corporate social responsibility disclosure, political connection and tax aggressiveness have become the focus of the media. By using samples of China’s listed firms from 2008 to 2014, this study examines the relationship among corporate social responsibility disclosure, political connection and tax aggressiveness. The results show that corporate social responsibility disclosure significantly strengthens the possibility of tax aggressiveness; firms with no or less close political connections can make use of the disclosure of corporate social responsibility to do tax aggressiveness. Furthermore, the change of political connection can significantly weaken the positive association between corporate social responsibility disclosure and tax aggressiveness. However, some data are collected by hands and that may cause some deviations. These findings help governments, managements and investors evaluate firm’s behavior and make decisions.
A Literature Review of the Influence of Social Exclusion on Consumer Behavior and Prospects  [PDF]
Xiaodan Yang
American Journal of Industrial and Business Management (AJIBM) , 2019, DOI: 10.4236/ajibm.2019.93050
Abstract:
Social exclusion is a common and threatening social experience that affects individual psychology and behavior. In particular, when there are social exclusion cues in the marketing environment, it will have an important impact on consumers’ behavioral decisions. However, in existing studies, the relationship between social exclusion and consumption behavior is still in chaos. Some scholars believe that individuals who experience social exclusion are more inclined to make nostalgic consumption or purchase corresponding products that symbolize group identity. However, other scholars pointed out that individuals who experience social exclusion are more inclined to conspicuous and unique consumption. It can be seen that when consumers are excluded by the society, their behavioral responses will deviate, and consumers will eventually use what kind of consumption behavior to make up for their internal defects. This problem has not been effectively solved. Therefore, this paper takes the social exclusion in consumption as the research object, first elaborates the concept of social exclusion, and then reviews the impact of social exclusion on people’s psychological needs. On this basis, the research status of social exclusion in the field of consumer behavior is summarized, and the consumer behavior generated by the social exclusion is summarized into two kinds of consumer behavior, namely relationship compensation behavior and ability compensation behavior. Finally, the future research direction of the influence of social exclusion on consumption behavior is prospected.
Two Novel Tyrosinase Inhibitory Sesquiterpenes Induced by CuCl2 from a Marine-Derived Fungus Pestalotiopsis sp. Z233
Bin Wu,Xiaodan Wu,Min Sun,Minhui Li
Marine Drugs , 2013, DOI: 10.3390/md11082713
Abstract: Two new sesquiterpenes, 1β,5α,6α,14-tetraacetoxy-9α-benzoyloxy-7β H-eudesman-2β,11-diol ( 1) and 4α,5α-diacetoxy-9α-benzoyloxy-7β H-eudesman-1β,2β,11, 14-tetraol ( 2), were produced as stress metabolites in the cultured mycelia of Pestalotiopsis sp. Z233 isolated from the algae Sargassum horneri in response to abiotic stress elicitation by CuCl 2. Their structures were established by spectroscopic means. New compounds 1 and 2 showed tyrosinase inhibitory activities with IC 50 value of 14.8 μM and 22.3 μM.
Current Status and Prospects of Biodiesel Production from Microalgae
Xiaodan Wu,Rongsheng Ruan,Zhenyi Du,Yuhuan Liu
Energies , 2012, DOI: 10.3390/en5082667
Abstract: Microalgae represent a sustainable energy source because of their high biomass productivity and ability to remove air and water born pollutants. This paper reviews the current status of production and conversion of microalgae, including the advantages of microalgae biodiesel, high density cultivation of microalgae, high-lipid content microalgae selection and metabolic control, and innovative harvesting and processing technologies. The key barriers to commercial production of microalgae biodiesel and future perspective of the technologies are also discussed.
Adsorption characteristics of Ni2+ ion onto the diethylenetriaminepentaacetic acid-melamine / polyvinylidene fluoride blended resin
Xiaodan Zhao, Laizhou Song, Jun He, Tingying Wu, Ying Qin
International Journal of Energy and Environment , 2010,
Abstract: The polyvinylidene fluoride blended resin (DTPA-MA/PVDF) adsorbent prepared by anchoring the chelating agent diethylenetriaminepentaacetic acid (DTPA) to the resin via the amide covalent bond reaction between DTPA and melamine(MA), was used to remove nickel from aqueous solutions. The blended resin was prepared using the combination of solution blending technique and phase inversion process. The blended resin was characterized by Fourier transform infrared spectroscopy (FTIR), 13C nuclear magnetic resonance spectroscopy (13C NMR), environmental scanning electron microscopy (ESEM) and N2 adsorption/desorption experiments. The sorption data was fit to linearized adsorption isotherms of the Langmuir, Freundlich, and D-R isotherms models. The batch sorption kinetics was evaluated using pseudo-first-order, pseudo-second-order, and intraparticle diffusion kinetic reaction models. ΔH° is less than 0, ΔG° is lower than 0, and ΔS° is greater than 0, which shows that the adsorption of Ni(II) by the blended resin is a spontaneous, exothermic process. The adsorption isotherm fits better to the Langmuir isotherm model and the pseudo-second-order kinetics model gives a better fit to the batch sorption kinetics. The adsorption mechanism is assumed to be ion exchange between the nickel ion and the polyamino polycarboxylic acid chelating group of the blended resin.
A global resource to translational medicine: the International Park of Translational Medicine and BioMedicine (IPTBM)
Wu Xiaodan,Marincola Francesco M,Liebman Michael N,Wang Xiangdong
Journal of Translational Medicine , 2013, DOI: 10.1186/1479-5876-11-8
Abstract: Translational science consists of research and development that integrates multiple resources to expedite the successful treatment of disease. The International Park of Translational BioMedicine (IPTBM) is currently being developed within the interface between Zhejiang Province and Shanghai Municipality. IPTBM has been designed to pioneer comprehensive biomedical research that spans the continuum from the education of young scientists to providing the infrastructure necessary for clinical testing and direct observation to better understand human biology while promoting viable commercial results within a vibrant biotechnology community. IPTBM’s goal is to attract global partners organized around five fundamental pillars: 1) Institutional Development, 2) Project Implementation, 3) Development and Production, 4) Investment and 5) Regulatory Clusters to address the needs of an international platform of scientists, institutes, universities, commercial enterprises, investors, politicians, and other stakeholders. The IPTBM differs from existing models including CTSA’s (US, NIH) technology because of its comprehensive approach to merge education, research, innovation, and development to translate clinical and public health needs into target-oriented and cost-efficient projects.
The Applicability Analysis of IPv6 Translation Transition Mechanisms  [PDF]
Wei Mi, Xiaodan Zhang
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2015, DOI: 10.4236/ijcns.2015.84008
Abstract:

Due to the exhaustion of IPv4 address resources, the transition from IPv4 to IPv6 is inevitable and fairly urgent. Numerous transition mechanisms have been proposed to solve challenging issues of IPv6 transition. An inter-connection between IPv4 and IPv6 networks or hosts requirement has been happening throughout the IPv6 transition process. And one-time translation scheme is indispensable to achieve the inter-connection. In addition, double translation can be used in the IPv4-IPv6-IPv4 scenario. As a long-term strategy, translation scheme is important and inevitable. However, because of the diverse characteristics and transition requirements of practical networks and the lack of applicability analysis, the selection and deployment of transition mechanisms are facing with grand challenges. Targeting at those challenges, this paper investigates the basic issues and key elements of IPv6 translation transition mechanisms, and presents its first applicability index system. In particular, we analyze the applicability of existing proposed translation techniques based on the presented index system, which has significant guidance in the practical deployment of IPv6 transition techniques.?

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