The objective of this research was to evaluate effects of partial replacement of trace mineral (Cu, Mn, Zn) sulfate by methionine hydroxy analog (MHA) chelates on laying performance, egg quality, enzyme activity and mineral retention in layers. Laying hens (Hyline Brown) of 37 weeks old were fed with 4 different diets with organic or inorganic trace mineral supplementations at equal levels.

The composite MnO2/ACP is reported for the first time and it shows high specific capacitance and remarkable rate capability.

No abstract

Various perovskite-type materials have been developed and applied in the field of solid oxide fuel cells (SOFCs). The perovskite oxides prepared by the traditional solid-state method usually need to be calcined at a temperature higher than 1000 °C. Herein, a modified solvothermal synthesis is proposed to prepare the La 0.43 Ca 0.37 Ti 0.94 Ni 0.06 O 3−δ (LCTNi) anode at 800 °C. Compared to the material with identical composition synthesized by the solid-state method (denoted as LCTNi-ss), LCTNi synthesized at the lower temperature possesses smaller particle size, greater specific surface area, higher total conductivity, and better interfacial contact with the electrolyte. The single cell assembled with the LCTNi anode exhibits desirable electrochemical performance using wet H 2 as fuel. The maximum power density is as high as ∼425 mW cm −2 at 800 °C in 3% H 2 O/97% H 2 (∼2.5 times higher than that of the LCTNi-ss anode single cell). The boosted performance is mainly attributed to the facilitated gas diffusion process at the LCTNi anode side.

Nowadays, trace CH4 emitted from vehicle exhausts severely threaten the balance of the ecology system of our earth. Thereby, the development of active and stable catalysts capable of methane conversion under mild conditions is critical. Here, we present a convenient method to redisperse catalytically inert PdO nanoparticles (NPs) (>10 nm) into reactive PdO x nanoclusters (∼2 nm) anchored on a Ce-doped LaFeO3 parent. Isothermally activated in an N2 flow, the redispersed catalyst achieved a CH4 conversion of 90% at 400 °C, which is significantly higher than the fresh and H2- and O2-treated counterparts (625, 616, and 641 °C, respectively), indicating the importance of the gas atmosphere in the redispersion of PdO NPs. In addition, the comprehensive catalyst characterizations demonstrated that the isolated Ce ions in the perovskite lattice play an irreplaceable role in the redispersion of reactive sites and the reduction of the energy barrier for C–H scission. More importantly, the Ce additive helps to stabilize the PdO x species by reducing overoxidation, resulting in significant lifetime extension. Through a thorough understanding of structural manipulation, this study sheds light on the design of highly performing supported catalysts for methane oxidation.