Molecular Dynamics Simulation of the Crystal Nucleation and Growth Behavior of Methane Hydrate in the Presence of the Surface and Nanopores of Porous Sediment.

The behavior of hydrate formation in porous sediment has been widely studied because of its importance in the investigation of reservoirs and in the drilling of natural gas hydrate. However, it is difficult to understand the hydrate nucleation and growth mechanism on the surface and in the nanopores of porous media by experimental and numerical simulation methods. In this work, molecular dynamics simulations of the nucleation and growth of CH4 hydrate in the presence of the surface and nanopores of clay are carried out.

[Therapeutic evaluation of He-wei Jie-gu (Chinese characters)Decoction on femoral intertrochanteric fracture after internal fixation in elderly: a randomized controlled trial].

Objective: To observe the efficacy of He-wei Jie-gu (Chinese characters) decoction on femoral intertrochanteric fractures after internal fixation in elderly.

Methods: From January 2010 to January 2012, 90 elderly patients with osteoporotic intertrochanteric fracture were randomly divided into two groups. The patients in experimental group were treated with open reduction and internal fixation, He-wei Jie-gu decoction and Caltrate D in oral, including 18 males and 27 females with an average age of (77.

[Synaptic vesicle recycling and Alzheimer's disease].

Loss of synapses correlates well with cognitive decline in Alzheimer's disease (AD). However, the molecular mechanisms underlying the synaptic dysfunction and loss are not well understood. Synaptic vesicle (SV) recycling is a key process for synaptic transmission.