In this experimental study, we investigate various transition-metal silicides as platinum-group-metal-(PGM)-free electrocatalysts for the hydrogen oxidation reaction (HOR), and for the hydrogen evolution reaction (HER) in acidic environment for the first time. Using cyclic voltammetry in 0.1 M HClO₄, we first demonstrate that the tested materials exhibit sufficient stability against dissolution...

The Front Cover shows the molecular sieve effect by carbon shell coated on metal surface. To suppress reverse current flow generated due to H2/O2 boundary formation under shut-down/start-up conditions during fuel cell operation, selective H2 permeation through allows high HOR activity while effectively inhibiting ORR. More information can be found in Research Article K. Ko, J. Min et al.

The present study appear the concentration, source and origin of petroleum hydrocarbons in sediment core two station Hor Al- Azim at Al – Huwaiza ,total hydrocarbon measurement by spectroflurometer were these cores. Higher concentration (20.5 μg/g) dry weight depthe (0-5) cm (I) while lower conceatrations (1.5) μg/g depth (100-105) cm, Al-Azim (II) higher conceantration was (17.52) (1.73) (80 -...

The perceived soundness of an analogy is influenced by shared relational structure between the analogs with higherorder relational (HOR) structure being the primary determinant (Gentner, Rattermann, & Forbus, 1993). We conducted a replication and extension to investigate whether the same pattern holds when deciding whether to extend a relational category label from a base example to a target. P...

INTRODUCTION Orthodontic diagnosis includes the interpretation of the relations between the craniofacial and cervical system, given the potential impact of the irregularities from one system to another. OBJECTIVE The aim of this study was to examine morphological characteristics of the cervical spine, depending on the parameters of the vertical craniofacial growth and gender in adult subjects...

Consider the much-discussed case of the distracted driver, who is alleged to successfully navigate his car for miles despite being completely oblivious to his visual states. Perhaps he is deeply engrossed in the music playing over the radio or in philosophical reflection, and as a result he goes about unaware of the scene unfolding before him on the road. That the distracted driver has visual e...

Human centromeres are defined by megabases of homogenous alpha-satellite DNA arrays that are packaged into specialized chromatin marked by the centromeric histone variant, centromeric protein A (CENP-A). Although most human chromosomes have a single higher-order repeat (HOR) array of alpha satellites, several chromosomes have more than one HOR array. Homo sapiens chromosome 17 (HSA17) has two j...

Whereas depressed mood, hopelessness, and previous suicide attempts have been well established as risk factors for suicidal behavior in schizophrenia (Siris, 2001), the role of psychotic symptoms and their quality has remainedmore controversial (Hawton et al., 2005; Hor and Taylor, 2010). Existing studies have focused on quantitative aspects of psychotic symptoms, to the exclusion of qualitativ...

Commonly used craniofacial reference planes such as Frankfort Horizontal (FH) and sella-nasion have shortcomings, including their variable interindividual orientation when related to true horizontal (HOR). Therefore, the aim of this study was to evaluate the potential usefulness of a range of craniofacial reference planes to HOR, including those which have not been investigated previously: the ...