Mussel-inspired dynamic facet-selective capping approach to highly uniform α-calcium sulfate hemihydrate crystals.

We report herein a dynamic facet-selective capping (dFSC) strategy for α-calcium sulfate hemihydrate crystal growth from dihydrate gypsum in the presence of a catechol-derived PEI capping agent (DPA-PEI) with inspiration by the biomineralization process of mussel. The crystal shape is controllable and varies from long and pyramid-tipped prisms to thin hexagonal plate. The highly uniform truncated crystals have extremely high compression and bending strengths after hydration molding.

One-step synthesis, electronic structure, and photocatalytic activity of earth-abundant visible-light-driven FeAlO.

The development of inexpensive visible-light-driven photocatalysts is an important prerequisite for realizing the industrial application of photocatalysis technology. In this paper, an earth-abundant FeAlO photocatalyst is prepared via facile solution combustion synthesis. Density functional theory and the scanning Kelvin probe technique are employed to ascertain the positions of the energy bands and the Fermi level.

[Therapeutic effect of zinc sulfate on lung injury during superior mesenteric artery occlusion(SMAO) shock].

Aim: To study preventive and therapeutic effect of zinc sulfate on lung injury during superior mesenteric artery occlusion (SMAO) shock and their mechanism of action.

Methods: Model of rabbit SMAO shock was made. The effect of zinc sulfate on the malondialdehyde (MDA) in erythrocyte membrane and plasma, oxidase (XOD) in plasma, superoxide dismutase (SOD) in erythrocyte and MDA, SOD and pulmonary surfactant (PS) in lung tissues homogenate were observed.

[The effect of NO, ET-1 on brain injury after hind limbs ischemia/reperfusion in rats].

Aim: To study the roles of nitric oxide (NO) and ET-1 in brain injury after hind limbs ischemia/reperfusion in rats and to investigate the effect of NO/ ET-1 balance on brain injury.

Methods: On a model of the hind limbs ischemia/reperfusion (LI/R) of rats, we used L-Arg(L-arginine, L-Arg), one of the substrates in the process of nitric oxide, aminoguanidine (AG) which inhibits nitric oxide synthase(NOS) and ETA receptor antagonist BQ123, to observe the changes of NO, ET-1, MDA, XOD, SOD, LDH in plasma and tNOS, iNOS, cNOS, NO, ET-1, MDA, XOD, MPO, SOD in brain tissue.

Results: Compared with the control group, the content of MDA, XOD, LDH in plasma and MDA, XOD, MPO in brain tissue increased.

[Function of endothelin-1 in neurogenic pulmonary edema].

Aim: To investigate the role of endothelin-1 in the pathogenesis of neurogenetic pulmonary edema.

Methods: The levels of endothelin-1 in plasma and lung were measured in rats which suffered from diffuse brain injury on Marmarous' model. The changes of endothelin-1 in the lungs were also detected using an immunohistochemical method.