Oxygen and Electron Storage Effects in W-Modified Ceria Catalysts for Ammonia Conversion.

Tungsten-modified CeO is an excellent catalyst for the catalytic conversion of ammonia. However, the geometric and electronic properties of this catalyst and the detailed reaction mechanisms are not well understood. In this work, the potential configurations of various monomer tungsten oxides supported on the CeO(111) surface (WO(x = 0-4)/CeO(111)) are systematically studied and their relative stabilities are evaluated by using on-site Coulomb interaction corrected density functional theory calculations.

Treating ischaemic stroke with intravenous tPA beyond 4.5 hours under the guidance of a MRI DWI/T2WI mismatch was safe and effective.

Purpose: Clinical trials have provided evidence that treating patients with acute ischaemic stroke (AIS) beyond 4.5 hours was feasible. Among them using MRI diffusion-weighted imaging/fluid attenuation inversion response (DWI/FLAIR) mismatch to guide intravenous tissue plasminogen activator (tPA) was successful.

[Determination of ascitic bacterial 16S rRNA by quantitative PCR-microarray in the diagnosis of spontaneous bacterial peritonitis].

Objective: To evaluate the significance of determining ascitic bacterial 16S rRNA by quantitative PCR combined with microarray (PCR-microarray) in the diagnosis of spontaneous bacterial peritonitis (SBP).

Methods: Ascitic bacterial 16SrRNA was determined by real time fluorescent quantitative PCR-microarray in 76 cases of suspected SBP and 6 cases of non-infectious ascites with chronic liver diseases. The results were compared with ascitic bacterial culture simultaneously.

[Determination of ascitic bacterial 16S rRNA gene in the rapid diagnosis of spontaneous bacterial peritonitis].

Objective: To evaluate the value of ascitic bacterial 16S rRNA gene determination in the rapid diagnosis of spontaneous bacterial peritonitis (SBP).

Methods: 16S rRNA gene from bacterial DNA in ascites was determined by quantitative fluorescent polymerase chain reaction (PCR) in 76 patients with suspected SBP and 6 patients with non-infectious ascites. The results were compared with those obtained from bacterial culture.

[The roles of saliva testing for preventing hepatitis B virus spreading].

Objective: To discuss the significance of testing hepatitis B virus (HBV) from saliva in HBV patients.

Methods: HBV DNA content in serum and saliva of 200 HBV patients and 20 healthy subjects were detected by fluorescence quantitative polymerase chain reaction. According to the serum level of HBV content, four groups were divided: control group A, group B negative, low virus C (1 x 10(3) - 1 x 10(5) copies/ml) and high-group D ( > 1 x 10(5) copies/ml).

[Clinical significance of intrahepatic hepatitis B core antigen (+) in patients with chronic hepatitis B].

Objective: This study aimed to assess the clinical significance of intrahepatic hepatitis B core antigen (HBcAg) (+) in patients with chronic hepatitis B (CHB).

Methods: 200 CHB patients were prospectively studied using fluorescence quantitative PCR (FQ-PCR), combined PCR with fluorescence probe hybridization technique, to determine serum HBV DNA. Serum HBeAg was measured quantitatively.