Ice drilling on Skytrain Ice Rise and Sherman Island, Antarctica

AbstractTo understand the long-term climate and glaciological evolution of the ice sheet in the region bordering the Weddell Sea, the British Antarctic Survey has undertaken a series of successful ice core projects drilling to bedrock on Berkner Island, James Ross Island and the Fletcher Promontory. A new project, WACSWAIN, seeks to increase this knowledge by further drilling to bedrock on two further ice rises in this region. In a single-season project, an ice core was recovered to bedrock at 651 m on Skytrain Ice Rise using an ice core drill in a fluid-filled borehole. In a second season, a rapid access drill was used to recover ice chips to 323 m on Sherman Island in a dry borehole, though failing to reach the bedrock which was at an estimated depth of 428 m.Royal Society ER

Planck intermediate results. XII: Diffuse Galactic components in the Gould Belt system

Peer reviewe

Planck intermediate results XV : A study of anomalous microwave emission in Galactic clouds

This article has an erratum: DOI 10.1051/0004-6361/201322612ePeer reviewe

SNAI2 (snail homolog 2)

Review on SNAI2 (snail homolog 2), with data on DNA, on the protein encoded, and where the gene is implicated

Glass-ceramic materials of system MgO-Al2O3-SiO2 from rice husk ash

This wok shows the results of a valorisation study to use rice husk ash as raw material to develop glass-ceramic materials.An original glass has been formulated in the base system MgO-Al2O3-SiO2 with addition of B2O3 and Na2O to facilitate the melting and poring processes. Glass characterization was carried out by determining its chemical composition. Sintering behaviour has been examined by Hot Stage Microscopy (HSM). Thermal stability and crystallization mechanism have been studied by Differential Thermal Analysis (DTA). Mineralogy analyses of the glass-ceramic materials were carried out using X-ray Diffraction (XRD). Results show that it is possible to use ash rice husk to produce glass-ceramic materials by a sintercrystallizationprocess, with nepheline (Na2O·Al2O3·SiO2) as major crystalline phase in the temperature interval 700-950ºC and forsterite (2MgO·SiO2) at temperatures above 950ºC

Glass-ceramic materials of system MgO-Al2O3-SiO2 from rice husk ash

This wok shows the results of a valorisation study to use rice husk ash as raw material to develop glass-ceramic materials.An original glass has been formulated in the base system MgO-Al2O3-SiO2 with addition of B2O3 and Na2O to facilitate the melting and poring processes. Glass characterization was carried out by determining its chemical composition. Sintering behaviour has been examined by Hot Stage Microscopy (HSM). Thermal stability and crystallization mechanism have been studied by Differential Thermal Analysis (DTA). Mineralogy analyses of the glass-ceramic materials were carried out using X-ray Diffraction (XRD). Results show that it is possible to use ash rice husk to produce glass-ceramic materials by a sintercrystallizationprocess, with nepheline (Na2O·Al2O3·SiO2) as major crystalline phase in the temperature interval 700-950ºC and forsterite (2MgO·SiO2) at temperatures above 950ºC