scholarly journals Hexagonal structure of phase III of solid hydrogen

2016 ◽  
Vol 94 (13) ◽  
Author(s):  
Bartomeu Monserrat ◽  
Richard J. Needs ◽  
Eugene Gregoryanz ◽  
Chris J. Pickard
Keyword(s):  
Solid Hydrogen ◽  
Hexagonal Structure ◽  
Phase Iii

scholarly journals Unconventional phase III of high-pressure solid hydrogen

2019 ◽  
Vol 100 (15) ◽  
Author(s):  
Sam Azadi ◽  
Thomas D. Kühne
Keyword(s):  
High Pressure ◽  
Solid Hydrogen ◽  
Phase Iii

scholarly journals Structure of phase III of solid hydrogen

2007 ◽  
Vol 3 (7) ◽  
pp. 473-476 ◽  
Author(s):  
Chris J. Pickard ◽  
Richard J. Needs
Keyword(s):  
Solid Hydrogen ◽  
Phase Iii

scholarly journals The role of van der Waals and exchange interactions in high-pressure solid hydrogen

2017 ◽  
Vol 19 (32) ◽  
pp. 21829-21839 ◽  
Author(s):  
Sam Azadi ◽  
Graeme J. Ackland
Keyword(s):  
High Pressure ◽  
Molecular Hydrogen ◽  
Van Der Waals ◽  
Exchange Interactions ◽  
Solid Hydrogen ◽  
Van Der Waals Interactions ◽  
Phase Iii

Our study of the van der Waals interactions in solid molecular hydrogen structures indicates two candidates for phase III.

Symmetry Breaking in Dense Solid Hydrogen: Mechanisms for the Transitions to Phase II and Phase III

2009 ◽  
Vol 103 (10) ◽  
Author(s):  
Pierre Tolédano ◽  
Hannelore Katzke ◽  
Alexander F. Goncharov ◽  
Russell J. Hemley
Keyword(s):  
Symmetry Breaking ◽  
Phase Ii ◽  
Solid Hydrogen ◽  
Phase Iii

Evidence from x-ray diffraction of orientational ordering in phase III of solid hydrogen at pressures up to 183 GPa

2010 ◽  
Vol 82 (6) ◽  
Author(s):  
Yuichi Akahama ◽  
Manabu Nishimura ◽  
Haruki Kawamura ◽  
Naohisa Hirao ◽  
Yasuo Ohishi ◽  
...  
Keyword(s):  
Solid Hydrogen ◽  
Phase Iii ◽  
X Ray Diffraction ◽  
X Ray ◽  
Orientational Ordering

scholarly journals Raman scattering and x-ray diffraction experiments for phase III of solid hydrogen

2010 ◽  
Vol 215 ◽  
pp. 012056 ◽  
Author(s):  
Y Akahama ◽  
H Kawamura ◽  
N Hirao ◽  
Y Ohishi ◽  
K Takemura
Keyword(s):  
Raman Scattering ◽  
Solid Hydrogen ◽  
Phase Iii ◽  
X Ray Diffraction ◽  
X Ray

scholarly journals Raman scattering and X-ray diffraction studies on phase III of solid hydrogen

2017 ◽  
Vol 950 ◽  
pp. 042060 ◽  
Author(s):  
Y Akahama ◽  
Y Mizuki ◽  
S Nakano ◽  
N Hirao ◽  
Y Ohishi
Keyword(s):  
Raman Scattering ◽  
Solid Hydrogen ◽  
Phase Iii ◽  
X Ray Diffraction ◽  
X Ray

Atomic structure of interface of intermetallic compound TiAl and nitride Ti2AIN using HREM and image processing

1991 ◽  
Vol 49 ◽  
pp. 570-571
Author(s):  
E. Sukedai ◽  
H. Mabuchi ◽  
H. Hashimoto ◽  
Y. Nakayama
Keyword(s):  
Mechanical Properties ◽  
Image Processing ◽  
Composite Material ◽  
Intermetallic Compound ◽  
Side Surface ◽  
High Resolution Electron Microscopy ◽  
Hexagonal Structure ◽  
Second Phase ◽  
Resolution Electron ◽  
Compound Tial

In order to improve the mechanical properties of an intermetal1ic compound TiAl, a composite material of TiAl involving a second phase Ti2AIN was prepared by a new combustion reaction method. It is found that Ti2AIN (hexagonal structure) is a rod shape as shown in Fig.1 and its side surface is almost parallel to the basal plane, and this composite material has distinguished strength at elevated temperature and considerable toughness at room temperature comparing with TiAl single phase material. Since the property of the interface of composite materials has strong influences to their mechanical properties, the structure of the interface of intermetallic compound and nitride on the areas corresponding to 2, 3 and 4 as shown in Fig.1 was investigated using high resolution electron microscopy and image processing.

Biophysics (and sociology) of ceramides.

2005 ◽  
Vol 72 ◽  
pp. 177-188 ◽  
Author(s):  
Félix M. Goñi ◽  
F-Xabier Contreras ◽  
L-Ruth Montes ◽  
Jesús Sot ◽  
Alicia Alonso
Keyword(s):  
Cell Biology ◽  
Positive Curvature ◽  
Acyl Chain ◽  
Cell Signalling ◽  
Hexagonal Structure ◽  
Lipid Monolayer ◽  
Flip Flop ◽  
Long Chain ◽  
Bilayer Permeability

In the past decade, the long-neglected ceramides (N-acylsphingosines) have become one of the most attractive lipid molecules in molecular cell biology, because of their involvement in essential structures (stratum corneum) and processes (cell signalling). Most natural ceramides have a long (16-24 C atoms) N-acyl chain, but short N-acyl chain ceramides (two to six C atoms) also exist in Nature, apart from being extensively used in experimentation, because they can be dispersed easily in water. Long-chain ceramides are among the most hydrophobic molecules in Nature, they are totally insoluble in water and they hardly mix with phospholipids in membranes, giving rise to ceramide-enriched domains. In situ enzymic generation, or external addition, of long-chain ceramides in membranes has at least three important effects: (i) the lipid monolayer tendency to adopt a negative curvature, e.g. through a transition to an inverted hexagonal structure, is increased, (ii) bilayer permeability to aqueous solutes is notoriously enhanced, and (iii) transbilayer (flip-flop) lipid motion is promoted. Short-chain ceramides mix much better with phospholipids, promote a positive curvature in lipid monolayers, and their capacities to increase bilayer permeability or transbilayer motion are very low or non-existent.

RTS,S/AS01, a vaccine targeting pre-erythrocytic stages of Plasmodium falciparum

2017 ◽  
Vol 1 (6) ◽  
pp. 533-537
Author(s):  
Lorenz von Seidlein ◽  
Borimas Hanboonkunupakarn ◽  
Podjanee Jittmala ◽  
Sasithon Pukrittayakamee
Keyword(s):  
Protective Efficacy ◽  
Age Groups ◽  
Sub Saharan Africa ◽  
Phase Iii ◽  
European Medicines Agency ◽  
Older Children ◽  
Pivotal Phase ◽  
Malaria Epidemiology ◽  
Maximum Benefit ◽  
Sub Saharan

RTS,S/AS01 is the most advanced vaccine to prevent malaria. It is safe and moderately effective. A large pivotal phase III trial in over 15 000 young children in sub-Saharan Africa completed in 2014 showed that the vaccine could protect around one-third of children (aged 5–17 months) and one-fourth of infants (aged 6–12 weeks) from uncomplicated falciparum malaria. The European Medicines Agency approved licensing and programmatic roll-out of the RTSS vaccine in malaria endemic countries in sub-Saharan Africa. WHO is planning further studies in a large Malaria Vaccine Implementation Programme, in more than 400 000 young African children. With the changing malaria epidemiology in Africa resulting in older children at risk, alternative modes of employment are under evaluation, for example the use of RTS,S/AS01 in older children as part of seasonal malaria prophylaxis. Another strategy is combining mass drug administrations with mass vaccine campaigns for all age groups in regional malaria elimination campaigns. A phase II trial is ongoing to evaluate the safety and immunogenicity of the RTSS in combination with antimalarial drugs in Thailand. Such novel approaches aim to extract the maximum benefit from the well-documented, short-lasting protective efficacy of RTS,S/AS01.

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