La cirugía tiroidea ha evolucionado desde su descripción inicial por Kocher a finales del siglo xix. A finales del siglo xx, surgió la tiroidectomía endoscópica, también denominada videoasistida. A comienzos del siglo xxi, los avances tecnológicos han permitido la realización de la tiroi...

Y-chromosomal haplogroups assigned from male-specific Y-chromosomal single nucleotide polymorphisms (Y-SNPs) allow paternal lineage identification and paternal bio-geographic ancestry inference, both being relevant in forensic genetics. However, most previously developed forensic Y-SNP tools did...

El 2,6-diisopropilfenol (propofol) se solubiliza en una emulsión lipídica que contiene aceite de soja y fosfátidos de yema de huevo. Su perfil farmacocinético es adecuado para la administración en bolo y en perfusión continua para el mantenimiento de la anestesia y la sedación. El propofo...

To match the electron cyclotron wave with the plasma efficiently, we design two polarizers including a linear polarizer and an elliptical polarizer for the 105 GHz electron cyclotron resonance heating system on J-TEXT. The linear polarizer is mainly used to change the rotation angle of the wave,...

A novel fibrous silica Y zeolite ([email protected]) loaded with Pt has been studied based on its ability to produce protonic acid sites originating from molecular hydrogen. The Pt/[email protected] was prepared using seed assisted crystallization followed by protonation and Pt-loading. The prod...

The volume of rectal epithelial mucus was quantified histologically following a single suppository treatment. It was: unchanged by suppositories of Witepsol H12; reduced significantly by suppositories of PEG 1540 1, 6 and 24 h post-treatment but increased after 48 h.

Coenzyme Q10 (CoQ10) was formulated into self-nanoemulsifying drug delivery systems (SNEDDS) to overcome low bioavailability attributed to hydrophobic nature of the drug. Screening of oil phase, surfactants and co-surfactants were performed to select Witepsol® H35, Solutol® HS15 and Lauroglycol®...

During the last decade there has been a growing interest in the formulation of new food and nutraceutical products containing compounds with antioxidant activity. Unfortunately, due to their structure, certain compounds such as polyphenols, in particular rosmarinic acid (RA) are not stable and m...

The metallic vanadium has an excellent hydrogen storage properties in comparison to other hydride forming metals such as titanium, uranium, and zirconium. The gravimetric storage capacity of vanadium is over 4 wt% which is even better than AB2 and AB5 alloys. The metallic vanadium has shown high...

Surface phenomena associated with the formation of vanadium hydride VHx were studied by measuring both the surface potential of thin V films and the H2 pressure during hydrogen interaction with vanadium. It has been found that hydrogen forms two different adspecies here referred to as β− and β...

The electronic structures of vanadium hydride, V2H, have been calculated by the DV-Xα molecular orbital method. From a series of calculations, it is found that the subtle lattice distortion is introduced into pure vanadium by hydrogenation and the V2H phase is formed so as to strengthen the met...

The equilibrium lattice parameters, formation energy, and diffusion behavior of hydrogen atoms in vanadium hydrides with and without Ti substitution were calculated by ab initio calculations and quantum correction by zero point energy was achieved using phonon vibration calculations. The calcula...

It is widely accepted that vanadium is unsuitable as a membrane material due to an extreme susceptibility to hydrogen embrittlement. Consequently, the focus of R&D effort towards hydrogen-selective, vanadium-based metal membranes in recent years has been the development of robust alloys with imp...

We present a method using resonant nuclear reaction analysis combined with optical transmission and heavy-ion Rutherford backscattering spectrometry to study the absorption of hydrogen in single crystalline thin vanadium films. Probing with the resonant 1H(15N,αγ)12C reaction allows for highly...

The tendency of vanadium-based alloy membranes to embrittle is the biggest commercialisation barrier for this hydrogen separation technology. Excessive hydrogen absorption and the α → β hydride transition both contribute to brittle failure of these membranes. Alloying is known to reduce absor...

Kinetics of interstitial hydrogen atoms near dislocation cores were analyzed by atomistic simulation. Classical molecular dynamics method was applied to model structures of edge and screw dislocations in α-phase vanadium hydride. Simulation showed that hydrogen atoms aggregate near dislocation ...

The alloying effects of iron and aluminum on the formation and decomposition temperatures of vanadium hydride, β phase, have been investigated by a series of in-situ X-ray diffraction measurements in hydrogen atmosphere. It is found that the addition of iron increases the formation temperature ...

Vanadium-based alloys are promising for the reversible and compact storage of renewable hydrogen. To improve the hydrogen desorption plateau pressure of vanadium hydrides, V–3A binary alloys of V97Al3, V97Mn3, and V97Ru3 were prepared by vacuum arc melting. Hydrogen absorption and desorption pr...

The Mineoka umbers occur within the Tertiary accretionary complex of central Japan, immediately overlying ~ 53.7 Ma tholeiitic basalts. The associated tholeiitic basalts exhibit typical normal mid-ocean ridge basalt (N-MORB)-type geochemical signatures and are interpreted to be a remnant of Tert...

The genesis of umber deposits has remained controversial for several decades. Recently, microbial Fe(II) oxidation associated with low-temperature diffuse venting has been identified as a key process for the formation of umber deposits, but the exact biogeochemical mechanisms involved to the pre...