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Search Results: 1 - 10 of 28288 matches for " Dahai Zhu "
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Analysis of the Aerosol Optical Depth and the Air Quality in Qingdao, China
Jinshan Zhu,Dahai Liu,Qingliu Zeng
Journal of Software , 2011, DOI: 10.4304/jsw.6.7.1194-1200
Abstract: Air quality plays an important role on human everyday life. Aerosols in the atmosphere can directly affect the air quality. Researches have already shown that the aerosol optical depth (AOD) or aerosol optical thickness (AOT) has relation to the air quality. The AOT can be retrieved from the multi-channel satellite data. MODIS data is used in this paper. Data for the Qingdao, Shandong area is selected. Further process is necessary to extract data that cover this area. The Air Pollution Index (API) can be obtained from China National Environmental Monitoring Centre. It is published for the main cities of China everyday. AOD data for each day from 2008 to 2009 is collected in this paper, the API in the same time range is also collected. We discussed the relationship between AOD and API. For part of the 2008 data, we get a correlation coefficient of 0.80. For the year 2009, the correlation coefficient of the whole year is 0.47, with p=0.12. The correlativity is not very well. Data from June to December is analyzed separately. Perfect result is obtained. The correlation coefficient is 0.87, with p=0.01. We also get the linear relation by regression.
A systematic analysis of the skeletal muscle miRNA transcriptome of chicken varieties with divergent skeletal muscle growth identifies novel miRNAs and differentially expressed miRNAs
Tingting Li, Rimao Wu, Yong Zhang, Dahai Zhu
BMC Genomics , 2011, DOI: 10.1186/1471-2164-12-186
Abstract: Some miRNAs have multiple isoforms and several miRNAs* are present at higher levels than their corresponding miRNAs. Thirty three novel and 189 known chicken miRNAs were identified using computational approaches. Subsequent miRNA transcriptome comparisons and real-time PCR validation experiments revealed 17 miRNAs that were differentially expressed between broilers and layers, and a number of targets of these miRNAs have been implicated in myogenesis regulation. Using integrative miRNA target-prediction and network-analysis approaches an interaction network of differentially expressed and muscle-related miRNAs and their putative targets was constructed, and miRNAs that could contribute to the divergent muscle growth of broiler and layer chickens by targeting the ACVR2B gene were identified, which can causes dramatic increases in muscle mass.The present study provides the first transcriptome profiling-based evaluation of miRNA function during skeletal muscle development in chicken. Systematic predictions aided the identification of potential miRNAs and their targets, which could contribute to divergent muscle growth in broiler and layer chickens. Furthermore, these predictions generated information that can be utilized in further research investigating the involvement of interaction networks, containing miRNAs and their targets, in the regulation of muscle development.Embryonic patterning and organogenesis involve coordinated differentiation, migration, proliferation and programmed cell death in metazoans. These complex cellular and developmental processes rely on precise spatiotemporal networks that regulate transcription factors at multiple levels including mRNA transcription and translation, protein stability and degradation. Recently, evidence has demonstrated that microRNAs (miRNAs or miRs) are involved in diverse aspects of biology including developmental regulation and the pathogenesis of human diseases [1-4]. miRNAs are small 19-24 nucleotide (nt) regulatory
Winning Consumers through Experience: Competition between Domestic and International Businesses  [PDF]
Yan Liu, Dahai Dong
American Journal of Industrial and Business Management (AJIBM) , 2013, DOI: 10.4236/ajibm.2013.33040
Abstract: Retail internationalization has received increasing attention due to its popularity as a business practice. Previous studies have focused on two main factors in the process of retail internationalization: resources and environment. In the resources category, one of the key factors that has been extensively studied is social capital [1]. And in the environment category, one of the most influential environmental factors is cultural distance and its consequence, psychic distance [2]. However, few studies have investigated social capital from the consumers’ perspective and considered the influence of psychic distance perceived by international retailers’ targeted consumers in the host market on their acceptance. This study aims to investigate how to decrease consumers’ psychic distance to obtain initial acceptance from the targeted consumers in the host country. Previous studies have found that perception is shaped through experience [3,4]. Therefore, the main argument in our study is that international businesses should focus on experiential marketing to reduce consumers’ psychic distance. In order to understand this argument in the host market competition, experiential marketing strategies in the domestic businesses framework, as well as in the international businesses framework, will be compared.

 

A Comparative Study of Customer Value Drivers between Traditional Channels and Network Channel  [PDF]
Sili Wang, Dahai Dong
Open Journal of Social Sciences (JSS) , 2015, DOI: 10.4236/jss.2015.33011
Abstract:

With the rapid development of information technology, more and more customers start shopping online, this phenomenon has caused the performance of physical stores reducing. This article uses Decision-Making Trial and Evaluation Laboratory (DEMATEL) approach to structure and evaluate the customer value drivers between traditional channels and network channels, finds out the different effect of the drivers in the two channels, then to guide practice.

Systematic identification of genes involved in divergent skeletal muscle growth rates of broiler and layer chickens
Qi Zheng, Yong Zhang, Ying Chen, Ning Yang, Xiu-Jie Wang, Dahai Zhu
BMC Genomics , 2009, DOI: 10.1186/1471-2164-10-87
Abstract: Taken together, 543 differentially expressed genes were identified between broilers and layers across different developmental stages. We found that differential regulation of slow-type muscle gene expression, satellite cell proliferation and differentiation, protein degradation rate and genes in some metabolic pathways could give great contributions to the divergent muscle growth rates of the two chicken lines. Interestingly, the expression profiles of a few differentially expressed genes were positively or negatively correlated with the growth rates of broilers and layers, indicating that those genes may function in regulating muscle growth during development.The multiple muscle cell growth regulatory processes identified by our study implied that complicated molecular networks involved in the regulation of chicken muscle growth. These findings will not only offer genetic information for identifying candidate genes for chicken breeding, but also provide new clues for deciphering mechanisms underlining muscle development in vertebrates.Myogenesis is a very complicated but precisely regulated developmental process whose mal-regulation can cause many neuronal, heart and muscular dysfunction diseases. During the embryonic period, muscle development starts with the emergence of somites. Myogenic precursor cells originated from somites first give rise to myoblasts, which will further undergo proliferation, migrate to their final locations and fuse into multinucleated myotubes, finally differentiate into mature muscle fibres [1]. In general, the final number of muscle fibres is fixed at the end of embryogenesis [2]. Muscle growth after birth is achieved by increase of fibre sizes, which is the consequence of satellite cells fusion to existing fibres [3,4]. Mature muscle fibres exhibit a remarkable plasticity, in response to external stimuli or disease. Physical exercise and mechanical loading are capable of producing significant increase in muscle mass by muscle fibre hyp
Differential expression profiling between the relative normal and dystrophic muscle tissues from the same LGMD patient
Yong Zhang, Jianwei Ye, Dazhi Chen, Xinyi Zhao, Xingjun Xiao, Sheng Tai, Wei Yang, Dahai Zhu
Journal of Translational Medicine , 2006, DOI: 10.1186/1479-5876-4-53
Abstract: To give insight into the molecular mechanisms of AR-LGMD, we have examined the differentially expressed gene profiling between the relative normal and pathological skeletal muscles from the same AR-LGMD patient with the differential display RT-PCR approach. The research subjects came from a Chinese AR-LGMD family with three affected sisters.In this report, we have identified 31 known genes and 12 unknown ESTs, which were differentially expressed between the relative normal and dystrophic muscle from the same LGMD patient. The expression of many genes encoding structural proteins of skeletal muscle fibers (such as titin, myosin heavy and light chains, and nebulin) were dramatically down-regulated in dystrophic muscles compared to the relative normal muscles. The genes, reticulocalbin 1, kinectin 1, fatty acid desaturase 1, insulin-like growth factor binding protein 5 (IGFBP5), Nedd4 family interacting protein 1 (NDFIP1), SMARCA2 (SWI/SNF related, matrix associated, actin dependent regulator of chromatin, subfamily a, member 2), encoding the proteins involved in signal transduction and gene expression regulation were up-regulated in the dystrophic muscles.The functional analysis of these expression-altered genes in the pathogenesis of LGMD could provide additional information for understanding possible molecular mechanisms of LGMD development.The limb-girdle muscular dystrophies (LGMDs) are a group of clinically and genetically heterogeneous disorders of the skeletal muscle inherited in either autosomal dominant or recessive fashion. LGMDs are characterized clinically by progressive muscle weakness predominantly in the pelvic and shoulder-girdle muscles, serum creatine kinase (SCK) elevation, normal intelligence and great variability, ranging from severe forms with onset in the first decade and rapid progression to milder forms with later onset and a slower course [1,2]. The diagnosis of LGMDs can be excluded by the finding of severely abnormal dystrophin staining on
The single nucleotide polymorphisms of the chicken myostatin gene are associated with skeletal muscle and adipose growth
Zhiliang Gu,Dahai Zhu,Ning Li,Hui Li,Xuemei Deng,Changxin Wu
Science China Life Sciences , 2004, DOI: 10.1360/02yc0201
Abstract: Myostatin, a new member of the TGF- superfamily, is predominantly expressed in skeletal muscle cells and functions as a negative regulator of skeletal muscle growth in animals. Recently, we have reported three single nucleotide polymorphisms (SNPs) in the chicken myostatin gene. Herein, we investigate the association of those SNPs with the production traits in a F2 chicken line derived from Broilers crossing to Silky with the least square analysis. The results show that the BB and AA genotypes are strongly associated with abdominal fat weight (AFW), abdominal fat percentage (AFP), and birth weight (BW) (P < 0.05). Breast muscle percentage (BMP) of the AA type is higher than that of the AB type. The breast muscle weight and breast muscle percentages of F2 individuals have significant difference between CC and DD genotypes (P < 0.05). Breast muscle weight (BMW) of EF birds is higher than that of EE birds (P < 0.05). In this report, we present the first genetic evidence to show that chicken myostatin not only plays an important role in controlling skeletal muscle growth and differentiation, but also may be involved in regulation of adipose growth in chicken.
The single nucleotide polymorphisms of the chicken myostatin gene are associated with skeletal muscle and adipose growth
GU Zhiliang,ZHU Dahai,LI Ning LI Hui DENG Xuemei WU Changxin,

中国科学C辑(英文版) , 2004,
Abstract: Myostatin, a new member of the TGF-p superfamily, is predominantly expressed in skeletal muscle cells and functions as a negative regulator of skeletal muscle growth in animals. Recently, we have reported three single nucleotide polymorphisms (SNPs) in the chicken my-ostatin gene. Herein, we investigate the association of those SNPs with the production traits in a F2 chicken line derived from Broilers crossing to Silky with the least square analysis. The results show that the BB and AA genotypes are strongly associated with abdominal fat weight (AFW), abdominal fat percentage (AFP), and birth weight (BW) (P < 0.05). Breast muscle percentage (BMP) of the AA type is higher than that of the AB type. The breast muscle weight and breast muscle percentages of F2 individuals have significant difference between CC and DD genotypes (P< 0.05). Breast muscle weight (BMW) of EF birds is higher than that of EE birds (P< 0.05). In this report, we present the first genetic evidence to show that chicken myostatin not only plays an important role in controlling skeletal muscle growth and differentiation, but also may be involved in regulation of adipose growth in chicken.
Provide Consumers with What They Want on Word of Mouth Forums  [PDF]
Yan Liu, Dahai Dong, Robert E. Burnkant
iBusiness (IB) , 2013, DOI: 10.4236/ib.2013.51A007
Abstract:

Internet word-of-mouth (WOM) has a powerful impact on the consumer information search process. However, richness in information causes information overload. Consumers are not able to efficiently find the information they need among numerous and often redundant WOM postings and forums. As consumers become knowledgeable about WOM outlets, they may lower their search cost as they learn what kind of information to expect on various WOM forums. This conceptual paper develops research propositions to explain: 1) types of information consumers expect to see on different types of WOM forums, and 2) how expectations relate to satisfaction with WOM information and forums.

Spatiotemporal Analysis of Infant Measles Using Population Attributable Risk in Shandong Province, 1999–2008
Yuhui Zhu, Qing Xu, Hualiang Lin, Dahai Yue, Lizhi Song, Changyin Wang, Huaiyu Tian, Xiaoxu Wu, Aiqiang Xu, Xiujun Li
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0079334
Abstract: Background Reduction of measles incidence and mortality has been encouraging in China. However, it remains an important public health concern among infants. This study aimed to examine the space–time distribution pattern of infant measles occurrence for the period of 1999–2008 in Shandong, China. Methods and Findings Measles cases among infants aged younger than 1 year were obtained from the national infectious diseases reporting information system. A spatiotemporal analysis using population attributable risk percent (PAR%) was used to distinguish between multiple geographic clusters of potential interest. The analysis detected 29 statistically significant space–time clusters with the most likely cluster in Zaozhuang City from 2006 to 2008. Of the 28 secondary clusters, 22 were found in 2008. The map of PAR%, relative risk (RR) and space–time cluster analysis indicated that the clusters were generally unchanged, and were found south-west and north-west of Shandong. The Lanshan District in Linyi had the highest PAR%, while highest RR was in the Yicheng District in Zaozhuang. Conclusion There were significant space-time clusters of infant measles in Shandong over the study period. PAR% is an effective way to analyze multiple clusters from their application like RR. Interrupting measles circulation and maintaining routine coverage over 95% may be the only effective strategy to achieve measles elimination.
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