Results 231 to 240 of about 583,239 (283)

Precipitation of niobic acid from potassium niobate in sulphuric acid solution: A route to niobium oxide

open access: yesThe Canadian Journal of Chemical Engineering, EarlyView.
Graphical abstract illustrating the niobic acid precipitation process applied and the product obtained. Abstract This study investigates the precipitation of niobic acid (Nb2O5.nH2O) from potassium niobate solution with addition of sulphuric acid, and its subsequent thermal conversion into niobium oxide (Nb2O5). Thermodynamic modelling with PHREEQC and
Cássia R. Souza   +4 more
wiley   +1 more source

Efficacy and Safety of Melatonin in Migraine Prophylaxis: A Systematic Review and Meta-Analysis of Randomized Controlled Trials. [PDF]

open access: yesCurr Pain Headache Rep
Abouelmagd ME   +8 more
europepmc   +1 more source

Chemie.KI – Automatisierte Aufgabenbewertung durch trainierte KI‐Modelle

open access: yesCHEMKON, EarlyView.
In Schule und Hochschule bearbeiten Lernende in der Regel mehr Aufgaben, als Lehrende korrigieren können. Wo der Mensch an seine Grenzen kommt, kann Künstliche Intelligenz (KI) ansetzen und bei Routineaufgaben unterstützen oder sie auch ganz übernehmen.
Timm Wilke
wiley   +1 more source

Subcortical nuclei and glymphatic system alterations in migraine with aura: a comparative 7T multimodal MRI analysis. [PDF]

open access: yesJ Headache Pain
Wang X   +16 more
europepmc   +1 more source

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