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Bo Xu,Yingzhe WANG,Shixin ZHU,Haizhu ZHOU,Changlong GOU,Wenlong DONG,Yu Wang,Yunhang GAO,Hongxia MA 한국곤충학회 2019 Entomological Research Vol.49 No.1
Chalkbrood, which results from Ascosphaera apis infection, is one of the bee diseases that causes serious damage to the bee colony. Understanding the molecular bases underlying immune response to chalkbrood disease would facilitate the genetic breeding of bees by selecting races with superior chalkbrood resistance. In this study, transcriptome sequencing was performed to identify genes and pathways involved in the immune response to As. apis infection in A. mellifera larvae. In total, 2,890 differentially expressed genes (DEGs) (FDR < 0.001) were identified between the healthy and As. apis infected bee larvae, including 2,214 up‐regulated and 676 down‐regulated unigenes. Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway classification of the DEGs revealed association with development, energy metabolism, signal transduction, disease, and immune response. Among the immune‐related genes, p38, toll‐like receptors (TLRs), integrin, and antimicrobial peptides were up‐regulated under As. apis infection. This study provides valuable gene transcriptional information towards the investigation of molecular mechanisms related to chalkbrood immune response and host pathogenesis in A. mellifera.
Guangshuo Wang,Dexing Zhao,Nannan Li,Yingzhe Zeng,Shuai Han,Yingying Ma,Xufeng Dong,Ruitao Yu 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.79 No.-
In this study,flower-like Fe3O4 microspheres with hierarchical structure were prepared by a one-stepsolvothermal method, and the obtainedflower-like Fe3O4 microspheres were adopted as a newmagnetorheological (MR) material to prepare a uniform MR suspension with high performances. Thesynthesized samples were systematically examined using FE-SEM, TEM, TGA, XRD, XPS, BET and VSM. The preparedflower-like Fe3O4 microspheres-based MRfluid indicated typical MR properties, asevidenced by the fact that shear stress, yield stress, viscoelastic storage modulus and loss modulus of MRfluid strongly depended on magneticfield strengths. Specifically, the resultant MRfluid showed goodsedimentation stability with sedimentation ratio of 86.5% in the settling period. The excellentsedimentation stability could be attributed to the uniqueflower-like hierarchical structure, high specificsurface area and the reduced particle-fluid density mismatch.