Search

Ball milling of magnesium hydride with germanium additives in argon for up to 10 h was shown to result in the formation of nanocomposites of α- and γ-modifications of MgH 2 together with individual Ge phase. When the as milled samples are heated-up, Ge interacts with MgH 2 to form Mg 2 Ge at T = 350–400 °C; the phase transformation overlaps with MgH 2 decomposition and Mg 2 Ge phase remains in the material after its re-hydrogenation at T = 300 °C and P (H 2)∼15 bar. The ball milled Ge-MgH 2 nanocomposites were found to be characterised by an improved hydrogen release via hydrolysis in organic acid solutions as compared to pure MgH 2 prepared and tested at the same conditions. It was found that the composite containing 5 wt% of Ge and ball milled for 5 h showed the best hydrogen generation performance, with total hydrogen release exceeding 1.55 NL/g (yield close to 100%) in one minute. • Ge does not interact with MgH 2 during milling in Ar for ≤10 hours. • The interaction, however, takes place when heating the milled composite to 350–400°C. • Mg 2 Ge is formed when heating ball milled MgH 2 –Ge composites. • MgH 2 –Ge composites exhibit superior hydrolysis performance in organic acid solutions. [ABSTRACT FROM AUTHOR]

We describe the topology of isoenergetic surfaces for an integrable system on the Lie algebra so(3, 1) and the critical points of the Hamiltonian for different parameter values. We construct bifurcation values of the Hamiltonian. [ABSTRACT FROM AUTHOR]

An advanced, eco-efficient "waste plus waste to hydrogen" method was developed for hydrogen generation and the simultaneous treatment of two types of waste generated from magnesium and brewery-based industries via hydrolysis. The hydrolysis of Mg scraps was carried out using brewery wastewater and the reaction was accelerated with acetic acid (aa) at different concentrations (0, 12, 18, 24 and 30 wt% aa). The concentration of pollutants such as cyclortisiloxane-hexamethyle (C 6 H 18 O 3 Si 3), which are persistent in conventional wastewater treatment, was successfully reduced. After the hydrolysis of the wastewater, 62.4% of chemical oxygen demand (COD) reduction and the complete colour removal were observed. The highest hydrogen generation, about 0.99 NL/min (>60% H 2 yield in 5 min), was observed in the presence of 30 wt% aa concentration in the hydrolysis reaction. This study proposes an eco-efficient hydrogen generation and waste treatment method as it simultaneously degrades pollutants and produces hydrogen utilizing Mg scrap waste and brewery wastewater without additional energy consumption. • Simultaneous hydrogen production and wastewater treatment via chemical hydrolysis. • Hydrogen production utilizing two types of wastes independent of energy. • Introducing a sustainable waste management and economic method for industries. [ABSTRACT FROM AUTHOR]

However, reports of (auto)antibodies to skin adhesion molecules in patients with inherited skin blistering disease,5 as well as single case reports of autoimmune skin blistering disease patients with previously unrecognized inherited skin blistering disease,6 challenge this assumption. Analysis of demographical-clinical features indicated that patients with polymorphic genotypes (TT + AT) of rs12260615 developed BP disease at a younger age compared to the wild-genotype AA (61.10 ± 4.16 vs. 72.83 ± 2.06, I P i = 0.01). [Extracted from the article]