Hierarchically Porous Implants Orchestrating a Physiological Viscoelastic and Piezoelectric Microenvironment for Bone Regeneration.

The extracellular matrix microenvironment of bone tissue comprises several physiological cues. Thus, artificial bone substitute materials with a single cue are insufficient to meet the demands for bone defect repair. Regeneration of critical-size bone defects remains challenging in orthopedic surgery.

Regulating Polysulfide Diffusion and Deposition via Rational Design of Core-Shell Active Materials in Li-S Batteries.

Polar host materials with strong adsorption capacity of polysulfides are designed to limit the shuttle effect in sulfur cathodes. However, a critical problem is to control diffusion and deposition of lithium polysulfides during cycling, which significantly impacts cycling stability and sulfur utilization. Here, we report using a sequential adsorption-guided self-assembly to design two types of core-shell sulfur particles with opposite polysulfide adsorption gradients to explore quantitatively the regulation of polysulfide diffusion and deposition.

Tailoring Crystalline Morphology by High-Efficiency Nucleating Fiber: Toward High-Performance Poly(l-lactide) Biocomposites.

In this work, a high-melting-point poly(l-lactide) fiber (hPLLA fiber) with high-efficiency nucleation activity was prepared and introduced into PLLA matrix to prepare fully biodegradable PLLA biocomposites. The highly active nucleating surfaces of the hPLLA fiber induced chain ordering and lamellar organization, leading to a preferable formation of well-organized PLLA transcrystallinity at the surface of the hPLLA fiber under quiescent conditions. The construction of such compact transcrystallinity increased the crystallinity and enhanced the interfacial adhesion, which largely promoted heat resistance, tensile strength, and barrier property of PLLA biocomposites at a low content of hPLLA fiber.

[Sero-epidemiological survey on general community population to understand the infection status after the first wave of pandemic 2009 H1N1 influenza in Guangdong province].

Objective: To understand the infection status of pandemic 2009 H1N1 influenza after the first epidemic wave and to estimate the infected population.

Methods: Multi-stage stratified random sampling was introduced with 4500 subjects chosen in Guangdong province. 1500 people were selected from 5 districts (3 streets were selected in every district) in Guangzhou city which was representing the large cities.

[Investigation of a norovirus outbreak through contaminated centralized water supply system].

Objective: To investigate the etiology and source of an infectious diarrhea outbreak and control the epidemic.

Methods: Through the retrospective cohort study, we had surveyed all the residents who complained symptoms of diarrhea or vomiting since Nov. 20th,2007 from the five villages in the north of town Y, and collected hygiene information on the water supply system of the five villages, the environment information of three villages and hygiene information of some case-indexed families, and tested the etiological biomarker, including nucleoside acid of norovirus through Real-time PCR and nested PCR technologies.

[Comparison between laparoscopic pyloromyotomy and open pyloromyotomy for infants with congenital hypertrophic pyloric stenosis].

OBJECTIVE: To compare the efficacy of laparoscopic pyloromyotomy with open pyloromyotomy in treatment of congenital hypertrophic pyloric stenosis(CHPS). METHODS: Fifteen patients (age 20%ape;90 days, body weight 2.5 approximate, equals 5.