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Through alloy sampling approach, phase equilibria in the Cu-Co-Zr ternary system have been determined. Based on the phases identified with electron probe microanalysis and x-ray diffraction, isothermal sections at both 873 and 1200 K were constructed. No ternary compound was detected. It is evident that remarkable ternary solubility occurs in almost all binary intermetallic phases at both temperatures. For instance, solubility of Co in Cu51Zr14 can be up to 17.6 and 27.5 at.% at 873 and 1200 K, respectively. Besides, continuous dissolution between CuZr and CoZr at 1200 K was observed, and the maximum content of Cu in CoZr at 873 K reaches to 42.5 at.%.

K2Zn3(P2O7)2was synthesized by solid state reaction and its crystal structure was determined byab initiomethod from powder X-ray diffraction (XRD) data. The title compound was determined to be orthorhombic with space groupP212121,Z=4, and lattice parametersa=12.901(8) Å,b=10.102(6) Å, andc=9.958(1) Å. Values of lattice parameters from 303 to 573 K were measured by temperature-dependent XRD. Thermal expansion coefficientsα0, lattice parameters, and cell volume at 0 K were determined to beα0(a)=1.62327×10−4/K,a0=12.855(4) Å,α0(b)=1.17921×10−4/K,b0=10.070(8) Å,α0(c)=2.62364×10−4/K,c0=9.880(4) Å, andα0(V)=6.599×10−2/K,V0=1278.967(0) Å3. The specific heat equation as a function of temperature was determined to beCp=0.77115+0.00231T−1241.60027T−2−1.4133×10−6T2(J/K g), for temperatures from 198 to 710 K. The melting point estimated from theμ-DTA heating curve is 795 °C.

The Tibetan herb Potentilla anserina L. has been widely used in China for many thousands of years to treat hepatitis-B. Bioassay-guided fractionation of the ethanol extract of the rhizomes led to the isolation of a triterpenoid saponin (TS) that was determined to be 2alpha,3beta,19alpha-trihydroxyurs-12-en-28-oic acid beta-D-glucopyranosyl ester. Using models of HBV infection, this compound was evaluated for its effect on HBV antigene expression in the 2.2.15 cell line in vitro and anti-hepatitis B virus (HBV) activities in Peking ducklings in vivo. Results showed that it could decrease the expression levels of HBsAg, HBeAg and HBVDNA in the 2.2.15 cell culture and the inhibitory effect was not due to the cytotoxity of the triterpenoid saponin. The antiviral study in vivo on Peking ducklings also demonstrated that this compound inhibits duck hepatitis B virus (DHBV) DNA replication.

Crystal structure of a new compound KBaB5O9 has been investigated from X-ray powder diffraction data. This compound is isostructural with KSrB5O9 and crystallizes in the monoclinic system with space group P21/c. Unit-cell parameters are a=6.7200(2) Å, b=8.3256(2) Å, c=14.3674(4) Å, and β=92.6103(3) deg. Its structure contains both B3O7 and B3O8 rings, which share a common B atom to form a complex two dimensional network constituting the basic B5O9 unit in the formula. Adjacent networks are bound together by Ba and K atoms, which have eight- and nine-coordinate sites, respectively. In addition, DTA and TGA curves reveal that KBaB5O9 decomposes at 798 °C. Photoluminescence (PL) characteristics of KBaB5O9:Eu3+ have been studied. The PL spectra show the strongest emission at 618 nm and the quench concentration of Eu3+ is 4 at. %.