Results 121 to 130 of about 1,300,697 (308)

Perceived importance and didactic difficulty of chemistry education: Insights from Czech teachers

The Curriculum Journal, EarlyView.
Abstract This empirical study examines how chemistry teachers in lower and upper secondary schools in the Czech Republic evaluate the content of the chemistry curriculum, focussing on its perceived importance and didactic difficulty. Based on a quantitative survey (N = 146), the study provides insight into the pedagogical content knowledge of ...
Jitka Lorenzová, Blanka Jirkovská, Martin Čapek Adamec, Jan Havlík, Petr Holzhauser, Daniela Nováková, Karel Němejc   +6 more
wiley   +1 more source

Stability of linear GMRES convergence with respect to compact perturbations

, 2020
Suppose that a linear bounded operator $B$ on a Hilbert space exhibits at least linear GMRES convergence, i.e., there exists ...
Blechta, Jan
core  

Insight Into the Origins of N2O Byproduct on Confinement Structure TiO2/MnSm Catalyst Through Sulfation Pre‐Treatment for Low‐Temperature NH3‐SCR Reaction

EcoEnergy, EarlyView.
Sulfation of TiO2 with tubular architecture assembly nanosheets cooperated with Sm modification endowed the TiO2–SO42−/MnSm catalyst with excellent low‐temperature NH3‐SCR activity, high N2 selectivity, and well H2O‐resistance. It clarifies how the Sm modification and sulfation adjusts the distribution of acid sites and modulates the activation of NH3 ...
Tian Zhao, Guodong Zhang, Xiaosheng Huang, Rongji Cui, Chao Feng, Zhicheng Tang   +5 more
wiley   +1 more source

Patrimonio natural antropizado del area minera de Río Tinto (España) [PDF]

, 2012
España Ministerio de Educación y Ciencia CGL2008-06270-C y CTM2005-05832 .España Junta de Andalucía P09-RNM ...
Fernández Caliani, Juan Carlos, Galán Huertos, Emilio, González Pérez, María Isabel, Peinado Herreros, María Ángeles (Coordinador), Romero Baena, Antonio, Rosa Díaz, Jesús Damián de la   +5 more
core  

A Three‐Dimensional Structural Model for Predicting Magnetic Exchange and Hydrogen Positions in Bis‐μ‐Hydroxido Cu(II) Dimers

European Journal of Inorganic Chemistry, EarlyView.
Magneto‐structural correlation in bis‐μ‐hydroxido Cu(II) dimers: The out‐of‐plane angle (α) of bridging hydroxido groups critically influences the exchange coupling constant (J). A three‐dimensional correlation combining α and the Cu‐OH‐Cu angle (θ) enables computationally accurate J prediction.
Stefani Gamboa‐Ramirez, Khalil Youssef, Rafaello Papadakis, Michel Giorgi, Sylvain Bertaina, A. Jalila Simaan, Maylis Orio   +6 more
wiley   +1 more source

Machine learning-based prediction of CO2 solubility in methyldiethanolamine solutions: A comparative study

Results in Engineering
Methyldiethanolamine (MDEA) is a widely used solvent in carbon capture processes owing to its high absorption capacity. However, there is a lack of comprehensive predictive tools for estimating CO2 solubility in MDEA-based solution.
Sajjad Fazeli, Mohammad Amin Moradkhani, Behrouz Bayati   +2 more
doaj   +1 more source

Phosphorescent Platinum(II) Complexes With Diazinedipyrrolide Pincer Ligands: Structure and Photophysical Properties

European Journal of Inorganic Chemistry, EarlyView.
A new family of phosphorescent Pt(II) complexes with pyrimidinedipyrrolide ligands, including a pyrazine analog, was designed and synthesized. Their emission properties can be finely tuned via ligand modification, revealing strong phosphorescence originating from intraligand charge transfer transitions.
Marcela Horáková, Alexandre Rico, Filip Bureš, Pascal le Poul, Sébastien Gauthier, Jiří Váňa, Zdeňka Růžičková, Sylvain Achelle   +7 more
wiley   +1 more source

(516) Amherstia [PDF]

Astronomische Nachrichten, 1906
openaire   +1 more source

Rational Optimization of Self‐Reporting Alcohol‐Oxidizing RhIII$^{\mathrm{III}}$ Complexes

European Journal of Inorganic Chemistry, EarlyView.
A series of four different [(NN)Rh(Cp*)X]n+$^{\mathrm{n+}}$ complexes (NN = chelating α$\alpha$‐diimine ligand, Cp* = pentamethylcyclopentadienyl, X = Cl, solvent) are reported which all do possess a colorimetric self‐reporting property upon alcohol oxidation formation of the Rh(I) state. Analysis of alcohol oxidation rates
Luca Hefty, Giada Caniglia, Muhammed Abdel‐Hamied, Alexander K. Mengele, Christine Kranz, Sven Rau   +5 more
wiley   +1 more source

On the Planarity of Heterocyclic Bay‐Substituted Perylenediimides: Insight into the Fluorescent Photoinduced Electron Transfer Sensing Framework

European Journal of Organic Chemistry, EarlyView.
Near‐infrared fluorescent pH indicators based on perylenediimide were constructed in a modular receptor–spacer–fluorophore–spacer–receptor format with heterocyclic amino moieties at the bay positions. Counterintuitively, the dibrominated intermediate with two heavy atoms is more emissive than the heterocyclic compounds.
Luke Camenzuli, Davide Benedetto Tiz, Nicola’ Agius, Konrad Szaciłowski, David C. Magri   +4 more
wiley   +1 more source