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The structure, electrical and dielectric properties of hydrogenated gallium selenide crystals were investigated. It was shown that AC-conduction mechanism along the crystallographic axis C in the 103–105 Hz have hoppin...

The geometry of the hydrogen bonds to the two carbonyl oxygens of the semiquinone QA- in the reaction center (RC) from the photosynthetic purple bacterium Rhodobacter sphaeroides R-26 were determined by fitting a spin Ha...

ABSTRACT Electrooxidation of sterols is recognized as a promising approach for synthesizing value‐added steroid hormone pharmaceuticals. However, enhancing current density while delivering market‐required steroidal c...

Abstract Current paradigms for the origin and evolutions of life and the environment on early Earth have been based on the premises that carbon dioxide (CO2) and nitrogen gas (N2) were the principal constituents of the a...

An optimized approach to the multigram synthesis of [(1R,2R,3S)-(+)-1,2-dimethyl-2,3-bis(diphenylphosphinomethyl)cyclopentyl]methanol (ROCKYPhos, CatASium I®), a camphor-derived chiral diphosphine ligand, has been devel...

Abstract The hypothesis was tested, whether hydrogen — ion concentration and electric conductivity in river water samples of the Tertiary region of central Amazonia were subject to changes in time and due to nature of ...

Abstract For a successful analysis of the relation between amino acid sequence and protein structure, an unambiguous and physically meaningful definition of secondary structure is essential. We have developed a set of si...

Materias / palabras clave: Photocatalysis; Materials science; Artificial photosynthesis; Hydrogen production; Water splitting; Carbon nitride; Hydrogen; Semiconductor; Solar energy; Catalysis; Polymer; Carbon fibers

The thermodynamic functions Gibbs energy, enthalpy and entropy for the dissolution and mixing processes of triclosan (TS) in water are presented. These quantities were calculated by means of the van't Hoff and Gibbs equa...

Materias / palabras clave: hydrogen, fuel cell, hydrogen research, cell technology; Technology: Chemical technology: Industrial electrochemistry; Technology: Chemical technology: Gas industry

Pure (KNbO3) and titanium-substituted (KTi0.1Nb0.9O3 and KTi0.2Nb0.8O3) potassium niobates with perovskite crystalline structures were prepared, characterized and tested as catalysts in the selective oxidation of 2-(meth...

We find that for adsorbed terephthalic acid (TPA) molecules surface Sn alloying deactivates the Cu(001) surface by decoupling the adsorbed molecules from the substrate. This effect is investigated for the case of the 0.5...

Zirconium alloys in nuclear power plants operate in high-pressure water at temperatures between 250 and 350 °C. Hydrogen (or deuterium) ingress due to waterside corrosion and if the solubility is exceeded H precipitates...

The application of 35% hydrogen peroxide in intracoronal bleaching generates free radicals that shorten resin tags and weaken the bond strength of composite resin restorations. Although 35% sodium ascorbate can neutraliz...

In this work, the characteristics of a commercial sample of LaNi5 are compared to those of an experimental one obtained by mechanical alloying followed by low temperature annealing. The nominal composition of the experim...

Abstract Background The residential building sector is a major contributor to Germany’s greenhouse gas emissions. Over 60 % of the energy used for space and domestic hot water heating comes from fossil fuels sources a...

Catalytic methane decomposition (CMD) offers a direct pathway to CO2-free hydrogen by converting CH4 into H2 and solid carbon. However, its application is constrained by the need for efficient heat delivery to the cataly...

Abstract Alkaline water electrolysis represents a promising pathway for green hydrogen production, yet comprehensive multi-physics simulation remains computationally prohibitive for practical design optimization. This st...

The increasing emission of carbon dioxide (CO2) due to industrialization and deforestation has accelerated global climate change, requiring the development of new technologies for CO2 capture and utilization. This study ...

The interaction between a stellar wind and its surrounding ISM can create H I cavities or bubbles. In particular, WR 6 shows a very large ovoidal H I bubble around it, whose shape cannot be explained in terms of the stan...

In this study, we present results from path integral molecular dynamics simulations that describe the characteristics of the quantum spatial delocalizations of protons participating in OH bonds in (MeOH)2H+ and in (MeOH)...

Abstract The article presents an interdisciplinary study examining the environmental and economic implications of introducing low-carbon fuels in coastal shipping. The main focus is on the comparison of alternative energ...

For protein structure to prevail in water, its backbone hydrogen bonds must be shielded from water attack, requiring a cluster of “wrapping” nonpolar groups. Thus, underwrapped regions are adhesive, as exogenous remo...

"The renewed concern for the care of the environment has led to lower emissions of greenhouse gases without sacrificing modern comforts. Widespread proposal focuses on energy produced from renewable sources and its subse...