Willis covered stent treatment for internal carotid artery pseudoaneurysm: A meta-analysis of efficacy and safety.

Background: Pseudoaneurysm (PSA) of internal carotid artery is a rare but severe cerebrovascular disease and difficult to repair surgically. A novel medical device called Willis covered stent (WCS) has been created especially for the treatment of complex cerebrovascular diseases. However, the efficacy and safety of WCS therapy for PSA are still debatable.

A bifunctionalized NiCoO-Au composite: Intrinsic peroxidase and oxidase catalytic activities for killing bacteria and disinfecting wound.

A NiCoO-Au composite was fabricated following the calcination-reduction method and testified to exhibit the intrinsic high peroxidase- and oxidase-like activities. The composite could activate a low level of HO (100 μM) to kill E. coli and S.

[Multi-scale spatial relations of PAHs and soil properties in Tianjin area].

Polycyclic aromatic hydrocarbons(PAHs) in soil have serious latent danger to our human health. Based on the sampling data, the spatial scale-dependent correlations of PAHs content and some soil properties are analyzed by Factorial Kriging for top soil in Tianjin area. Based on 1 88 topsoil samples in Tianjin area, pH, TOC, CLAY and sum of 16prior PAHs are tested.

[PAHs in airborne particles from Tianjin in winter season].

Total suspended particles (TSP) samples from 13 stations in Tianjin were collected and analyzed for polycyclic aromatic hydrocarbons (PAHs) during 2002 winter. There was significant difference in total PAH concentration among 13 samples. TSP samples from the east Economic Development Area and mid-north districts had the highest contents of PAHs, while Dagang Oil Field had the lowest PAH content.

Multimedia fate model for hexachlorocyclohexane in Tianjin, China.

A level III fugacity model was applied to characterize the fate of gamma-HCH in Tianjin, China, before the 1990s when the contamination reached its maximum at steady state. Geometric means were used as model inputs. The concentrations of gamma-HCH in air, surface water, soil, sediment, crops, and fish as well as transfer fluxes across the interface between the compartments were derived under the assumption of steady state.

[Multimedia fate modeling with spatial resolution for phenanthrene in Tianjin].

Behavior and fate of phenanthrene in various phases in Tianjin were calculated using a multimedia model with spatial resolution under steady-state assumption. Spatial variation of two parameters, namely soil organic carbon content and emission from fossil fuel combustion, were taken into consideration. Both soil and air phases were further divided into 3113 sub-compartments and 6226 equations in total were solved simultaneously under mass-balance assumption.

Fate modeling of phenanthrene with regional variation in Tianjin, China.

A multimedia fate model with spatially resolved air and soil phases was developed and evaluated. The model was used for calculation of phenanthrene concentrations in air, water, soil, and sediment in Tianjin area and transport fluxes between the adjacent bulk phases under steady-state assumption. Both air and soil phases were divided into 3113 individual compartments of 4 km2 each to assess the spatial variation of phenanthrene concentrations and fluxes.