Abstract Ce x Zr 1-x O 2 (CZ) plays an important role in many environment catalytic fields such as automobile three-way catalysts (TWCs), but improving their thermal stability is still a great challenge. In this work, strategy was proposed to enhance the of CZ by combining experiment with ab-initio molecular dynamics (AIMD) method. It found that 0.35 0.60 M 0.05 (M represent La, Y, and Nd eleme...

This study comprehensively analyzes the safety and stability of old goaf under construction engineering based on specific projects using a variety research methods. The Beijing Mentougou mining area is used as background. methods field investigation, laboratory testing, drilling, geophysical exploration, theoretical calculation, numerical simulation are combined to quantitatively analyze founda...

Article history: Received on: 27/03/2014 Revised on: 21/04/2014 Accepted on: 07/05/2014 Available online: 28/07/2014 To evaluate immunomodulatory activity of polyphenolic fraction of Cinnamomum zeylanicumbark (PP-CZ) against infection-related conditions using normal and immune-compromised mice. The normal and cyclophosphamide (CYP)-induced immune-compromised mice were sensitized with SRBCs and ...

Repeated inspiratory occlusions in humans elicit respiratory-related cortical potentials, the respiratory counterpart of somatosensory-evoked potentials. These potentials comprise early components (stimulus detection) and late components (cognitive processing). They are considered as the summation of several afferent activities from various part of the respiratory system. This study assesses th...

Underground longwall mining can seriously disturb the surrounding rock masses above panel. A surface cracking zone, continuous deformation fractured and caved zone be formed in overlying strata (termed “four zones”), which may further result spontaneous combustion of coal seams water inrush. It is essential to study predict development characteristics four zones induced by guarantee safety. The...

A series of indole (In) and carbazole (Cz) derivative monomers have been synthesized, such as 4-[3-carbazolyl] (4In-3Cz), 5-[3-carbazolyl] (5In-3Cz), 6-[3-carbazolyl] (6In-3Cz), 7-[3-carbazolyl] (7In-3Cz). The comonomers synthesized by Stille coupling reaction were characterized 1H-NMR elemental analysis. Potentiodynamic method was used for electropolymerization comonomers, Indole, Cz, the mixt...

There have been frequent occurrences of water–sand inrushes in underground mines due to irregular mining activities under thick loose gravel layers. The morphological development characteristics the caving zone and changes geological conditionsin working face a sedimentlayerof Pingan Coal Mine studied. empirical formula numerical simulations are carried out explore effect different thicknesses ...

There are several massive deposits around the world with different geological characteristics. Thus, mining methods and strategies applied based on particularity of each method mine experience. Particularly, in this work, we review summarize underground exploitation some world-class base metal Poland Chilean experiences. Here, main parameters mines reported analyzed. In Poland, mainly room pill...

The evolution of surface subsidence is an important focus of study above Molycorp, Inc.’s newest block cave at the Questa molybdenum mine near Taos, New Mexico. The case study compares mature glory hole subsidence over the Goathill Orebody and subsidence emerging in its earliest stage over the new D Orebody block cave. Subsidence above the D Orebody was first detected in April 2003, 30 months a...