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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 ...

"The global energy crisis necessitates the development of sustainable energy sources, with nuclear fusion representing a significant long-term opportunity for the future. However, the licensing process for facilities lik...

Tesis Energía y Ambiente (maestría) - Instituto Tecnológico de Buenos Aires, Buenos Aires - Karlsruher Institut für Technologie, Karlsruhe, 2024 "Simulation of Rotating Detonation Combustors (RDC) represents a signif...

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 main objective of the study is to present a comprehensive and, above all, updated overview of the hydrogen demand and supply situation. The physical and chemical properties of hydrogen are presented, together with an...

"The EU project HySEA is dedicated to explosion risk reduction by deflagration venting of industrial hydrogen installations. In 20-foot ISO containers, several experiments have been conducted to provide data for combusti...

The development of sugar-free chocolates and compound chocolates represents a challenge for food technology. In effect, the fully replacement of sugar affects physical quality characteristics like rheological properties ...

In this paper we investigate the effects of element diffusion on the structure and evolution of low-mass helium white dwarfs. Attention is focused mainly on the occurrence of hydrogen shell flashes induced by diffusion p...

"This thesis evaluates the technical, economic and environmental performance of a hydrogen fueled hybrid bus, which uses an internal combustion engine as a power unit. Results are compared to those of a conventional dies...

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...

"The aim of this project is to study the use of energy surplus from local renewable sources at isolated places in Argentina, to produce electrolytical hydrogen as clean fuel for electricity generation. Furthermore, the h...

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...

An increase in the frequency of 35% hydrogen peroxide (HP) application during intracoronal bleaching leads to a higher accumulation of free radical residues, which can negatively affect the bonding of composite resin. Th...

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 ...