Jiangang Guo

Learn More
A duplex polymerase chain reaction (PCR) was developed and optimized for simultaneous detection and differentiation of Capripoxvirus (CPV) (including goat pox virus and sheep pox virus) and orf virus (ORFV). Two sets of specific oligonucleotide primers were designed and used for CPV and ORFV, respectively. The duplex PCR DNA products, which consisted of(More)
We reported for the first time the isolation of H9N2 influenza virus from dogs in southern China. Genetic analysis of an isolate revealed that it was a novel genotype closely related to avian H9N2 virus. Epidemiologic studies demonstrated that the new H9N2-subtype virus was the causative agent of a disease in canine. Therefore, an appropriate countermeasure(More)
We report a finding of a pressure-induced quantum critical transition in K0.8Fe(x)Se2 (x = 1.7 and 1.78) superconductors through in situ high-pressure electrical transport and x-ray diffraction measurements in diamond anvil cells. Transitions from metallic Fermi liquid behavior to non-Fermi liquid behavior and from antiferromagnetism to paramagnetism are(More)
The discovery of ThCr2Si2-type A(x)Fe(2-y)Se2 (A = K, Rb, Cs and Tl) with Tc ~30 K make much progress in iron-based superconducting field, but their multiple-phase separations are disadvantageous for understanding the origin. On the other hand, for small alkali metals, studies on (Li,Na)FeCu(S,Se)2 and NaFe(2-δ)S2 show that these compounds possess(More)
FeSe-based intercalates are regarded as promising candidates for high-critical temperature (Tc) superconductors. Here we present new Na- and Sr-intercalated FeSe superconductors with embedded linear diamines (H2N)CnH2n(NH2) (abbreviated as DA; n = 0, 2, 3, or 6) prepared using a low-temperature ammonothermal method to investigate the effect of interlayer(More)
We have established a well-defined dome-shaped T(c) curve in Ir(0.94-x)Rh(x)Se(2) superconductors. The maximum T(c)(onset) of 9.6 K was obtained at x = 0.36, at which the Se-Se separation in the dimer anion is the longest. Simultaneously, the destabilization of Se-Se dimers accompanied by partial electron transfer from the Ir/Rh to the chalcogenide ions(More)
Materials combining the hardness and strength of diamond with the higher thermal stability of cubic boron nitride (cBN) have broad potential value in science and engineering. Reacting nanodiamond with cBN at moderate pressures and high temperatures provides a pathway to such materials. Here we report the fabrication of Cx-BN nanocomposites, measuring up to(More)
Four new oxyselenides with nominal formula Sr(2)AO(2)M(2)Se(2) (A=Co, Mn; M=Cu, Ag) have been synthesized. They all crystallize in an I4/mmm space group and consist of alternating perovskite-like (Sr(2)AO(2))(2+) blocks and antiflourie (M(2)Se(2))(2-) layers, which are relatively rare layered oxyselenides reported so far that are isostructural to(More)
Accumulated evidence indicates that phase separation occurs in potassium intercalated iron selenides, a superconducting phase coexisting with the antiferromagnetic phase K2Fe4Se5, the so-called '245 phase'. Here, we report a comparative study of substitution effects by Co and Mn for Fe sites in K0.8Fe2-ySe2 within the phase separation scenario. Our results(More)
OBJECTIVE Our aim in this study was to determine the genetic characterization and probable origin of the H1N2 swine influenza virus (A/Swine/Guangxi/13/2006) (Sw/GX/13/06) from lung tissue of a pig in Guangxi province, China. METHODS Eight genes of Sw/GX/13/06 were cloned and genetically analyzed. RESULTS The hemagglutinin (HA), nucleoprotein (NP),(More)