Abstract The development of efficient electrocatalysts based on Pt-free materials is a crucial step for the maturation competitive water splitting technologies able to sustain upcoming hydrogen-based economy. In this context, present work optimizes codeposition/annealing methodology produce electrocatalytic layers hydrogen evolution reaction (HER) one most promising alternatives Pt-based cataly...

Natural phosphides--the minerals containing phosphorus in a redox state lower than zero--are common constituents of meteorites but virtually unknown on the Earth. Herein we present the first rich occurrence of iron-nickel phosphides of terrestrial origin. Phosphide-bearing rocks are exposed in three localities in the surroundings of the Dead Sea, Levant: in the northern Negev Desert, Israel and...

Aim. To study serum concentrations of trace and macro elements their correlations in children adolescents after antitumor therapy, depending on the presence or absence caries. Materials methods. The included 98 patients aged 4 to 17 years who were remission an therapy performed for acute leukemia lymphomas. Patients with carious tooth lesions group 1 ( n = 34) without caries – 2 64). We used in...

Investigation into proximate and mineral content of three commercially important fish species (Lates niloticus, Clarias anguillaris and Hemisynodontis membranaceus using the traditional smoked method was conducted. Proximate analysis showed significant differences (P< 0.05) among the fish samples. However, there was no significant difference in their mineral content. Crude protein in fish sampl...