[Characteristics and Risks of Heavy Metals Content in Surface Sediment of Tidal Flat Areas in Eastern China].

To understand the heavy metals content such as As, Cd, Cr, Cu, Hg, Pb, and Zn, as well as their distribution features in surface sediments of tidal flat areas of Eastern China, mathematical statistics, correlation analysis, factor analysis and other statistical methods are used. This study collected 1906 surface sediment samples of As, Cd, Cr, Cu, Hg, Pb, Zn were collected as part of a systematic research effort. These results show that the coastal tidal flats zone of Eastern China contains surface sediment samples with heavy metal concentrations (As, Cd, Cr, Cu, Hg, Pb, and Zn) with is not high but has increased due to anthropogenic sources. The total content of heavy metals in Jiangsu province is low, however, in Shanghai and Zhejiang provinces relatively high heavy metal contents are present. In addition to natural causes, the heavy metal content in coastal sediment in Shanghai and Zhejiang is significantly affected by human activities, while Jiangsu coastal surface sediments has light impacts from human activities. Heavy metal contamination in coastal areas Shanghai, Zhejiang, and Fujian provinces is particularly serious including Hg, Cd, and Cu contamination. The results of an evaluation using the Marine Pollution Sediment Index and Mean Sediment Quality Guidelines show that in Eastern China, the overall sediment pollutant ecological risk is low for Jiangsu and Fujian provinces, however, the ecological risk for the tidal flats of Shanghai and Zhejiang provincial beaches is relatively high due to heavy metal concentrations.

[Testing Research of Transient Temperature Distribution for the Barrel Surface by Speckle Pattern Interferometry].

There are some problems in the traditional transient temperature test equipment. The thermal inertia is great, and can only be a single point of detection. To be able to achieve real-time monitoring for transient temperature distribution change of the gun body surface, the test system for transient temperature distribution was designed based on Speckle Pattern Interferometry (SPI) and spectroscopy. In the system, transient temperature change of the barrel led to slight deformation, and it was converted into speckle interference fringes by SPI technology. Spectral distribution function was obtained by the interference fringes by the Fourier transform, so the information of interference fringe deformation was incorporated into the frequency domain. The data of temperature distribution can be inverted on any sampling time by spectral distribution function. In experiments, the ZX-FB1 fiber optic thermometer was used to test transient temperature on a single point as the standard value. The center wavelength of the laser was 555 nm, and the speckle pattern interference fringes were collected by area array CCD. Image Recognition-Speckle Pattern Interferometry (IR-SPI) and Fourier Transform-Speckle Pattern Interferometry (FT-SPI) were used in experiments, the calculation of transient temperature was completed through two methods. Experimental results are that both methods can achieve transient temperature detection. But the FT-SPI is higher in terms of accuracy, and it can effectively overcome the gross error caused by the surface defects, paint wear and other similar problems.

1-[(Z)-8-(4-Chlorophenoxy)-3-(2,4-di-fluorophenyl)-4-oxaocta-2-en-2-yl]-1H-1,2,4-triazol-4-ium nitrate.

In the title compound C(21)H(21)ClF(2)N(3)O(2) (+)·NO(3) (-), the triazole ring makes dihedral angles of 40.7 (3) and 30.2 (4)° with the 4-chloro-pheny and 2,4-difluoro-phenyl rings, respectively. The cation adopts a Z-configuration about the C=C double bond which links the triazole ring to the 4-chloro-phen-oxy unit via a but-yloxy chain. In the crystal, the cations and the anions are linked by N-H⋯O, C-H⋯O and C-H⋯F hydrogen bonding.

Pharmacokinetics of astragaloside iv in beagle dogs.

In this study, the pharmacokinetics of Astragaloside iv (AGS-IV) in Beagle dogs was studied by high performance liquid chromatography (HPLC) coupled with tandem mass spectrometry (MS). The concentrations of the drugs in plasma were determined after i.v. administration of 0.5, 1, 2 mg.kg(-1) AGS-IV and p.o. administration of 10 mg.kg(-1) AGS-IV. The areas under concentration-time curve (AUC) were linearly correlated to the doses administrated. The absolute bioavailability of AGS-IV after p.o. administration was found to be 7.4%. The plasma protein binding rate of AGS-IV was about 90% within a concentration range of 250-1000 ng.ml(-1). There was no significant species difference regarding the pharmacokinetics of AGS-IV between the rat and the Beagle dog.