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Vertex-primitive self-complementary graphs were proved to be affine or in product action by Guralnick et al. [‘On orbital partitions and exceptionality of primitive permutation groups’, Trans. Amer. Math. Soc.356 (2004), 4857–4872]. The product action type is known in some sense. In this paper, we provide a generic construction for the affine case and several families of new self-complementary Cayley graphs are constructed.
The oxidation behavior of the selective laser melting (SLM)–fabricated Inconel 718 was investigated through isothermal oxidation testing at 650 °C for 500 h and compared with that of the as-cast and as-forged specimens at the same testing conditions. The effect of microstructure and surface roughness on the oxidation behavior of the SLM-fabricated, as-cast, and as-forged Inconel 718 specimens was examined. The result shows that Inconel 718 fabricated by SLM with the unique layer structure exhibited a better resistance to the 500 h oxidation at 650 °C compared with as-cast and as-forged 718 with coarse dendritic structure and uniform equiaxed grain microstructure, respectively. The influence of the surface roughness on the long-time oxidation resistance of SLM specimens is not pronounced compared with that of as-cast and as-forged specimens. The tiny dendrites instead of grain boundaries are a major influencing factor for the oxidation process of SLM specimens. The surface roughness has more evident influence on the oxidation resistance of as-forged specimens than that of the as-cast ones subjected to the 500 h oxidation at 650 °C.
The Myanmar snub-nosed monkey Rhinopithecus strykeri was discovered in 2010 on the western slopes of the Gaoligong Mountains in the Irrawaddy River basin in Myanmar and subsequently in the same river basin in China, in 2011. Based on 2 years of surveying the remote and little disturbed forest of the Gaoligong Mountains National Nature Reserve in China, with outline transect sampling and infrared camera monitoring, a breeding group comprising > 70 individuals was found on the eastern slopes of the Gaoligong Mountains in the Salween River Basin. Given the Critically Endangered status of this primate (a total of < 950 individuals are estimated to remain in the wild), efforts to protect the relatively undisturbed habitat of this newly discovered population and to prevent hunting are essential for the long-term survival of this species.
To identify Porcine haemagglutinating encephalomyelitis virus (HEV) 67N receptor in porcine kidney (PK) cell membranes, the S1 protein of HEV was expressed in Pichia pastoris and purified by Ni2+ affinity chromatograph. Polyclonal antibodies to HEV were prepared by immunizing rabbits by injecting the purified S1 protein four times. After SDS–polyacrylamide gel electrophoresis (SDS–PAGE), the PK cell membrane proteins were transferred on to nitrocellulose membrane. A virus overlay protein binding assay (VOPBA) was performed using the recombinant S1 protein to identify the protein binding receptor, HEV-S1. The result showed that HEV-S1 protein bound to one band (about 90 kDa) in PK cell membranes. This result is very important for the study of the pathogenic mechanism of HEV.
Differences in immunostimulation activity of CpG oligodeoxynucleotides (ODNs) between pigs and mice were studied. In accordance with current research data, three kinds of CpG ODN – 2006, D19 and 1826, which were identified as optimally active in humans, pigs and mice, respectively – and control ODN D48, a non CpG-containing ODN, were selected and synthesized. Results indicated that CpG ODN D19 strongly stimulated the proliferation of porcine peripheral blood mononuclear cells (PBMCs), and the amount of γ-interferon in the supernatant of activated cells increased, exceeding that of all other ODNs tested, while mouse splenocytes did not respond. CpG ODN 1826 strongly stimulated the proliferation of mouse splenocytes, but porcine PBMCs remained unresponsive. CpG ODN 2006 effectively stimulated proliferation of both porcine PBMCs and mouse splenocytes. Therefore some specific CpG ODNs, D19 and 1826, selectively stimulated animal species, while CpG ODN 2006 possessed a common stimulation effect. In addition, CpG ODN D19 predominantly induced the response of type 1 T-helper cells in vivo.
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