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Helium: Helium. A noble gas with the atomic symbol He, atomic number 2, and atomic weight 4.003. It is a colorless, odorless, tasteless gas that is not combustible and does not support combustion. It was first detected in the sun and is now obtained from natural gas. Medically it is used as a diluent for other gases, being especially useful with oxygen in the treatment of certain cases of respiratory obstruction, and as a vehicle for general anesthetics. (Dorland, 27th ed)

Solid-Liquid Extraction

JoVE 5538

Source: Laboratory of Dr. Jay Deiner — City University of New York


Extraction is a crucial step in most chemical analyses. It entails removing the analyte from its sample matrix and passing it into the phase required for spectroscopic or chromatographic identification and quantification. When the sample is a solid and the required…

 Organic Chemistry

Ideal Gas Law

JoVE 5537

Source: Laboratory of Dr. Andreas Züttel - Swiss Federal Laboratories for Materials Science and Technology


The ideal gas law describes the behavior of most common gases at near-ambient conditions and the tendency of all chemical matter in the dilute limit. It is a fundamental relationship between three measurable macroscopic system…

 General Chemistry

Cryogenic Liquid Jets for High Repetition Rate Discovery Science

1SLAC National Accelerator Laboratory, 2University of Alberta, 3Friedrich-Alexander-Universität Erlangen-Nürnberg, 4European XFEL, 5Helmholtz-Zentrum Dresden-Rossendorf, 6Technische Universität Dresden, 7Technische Universität Darmstadt


JoVE 61130

 Engineering

Technical Aspect of the Automated Synthesis and Real-Time Kinetic Evaluation of [11C]SNAP-7941

1Department of Biomedical Imaging and Image-guided Therapy, Division of Nuclear Medicine, Medical University of Vienna, 2Department for Pharmaceutical Technology and Biopharmaceutics, Faculty of Life Sciences, University of Vienna, 3Ludwig Boltzmann Institute Applied Diagnostics, 4CBmed GmbH - Center for Biomarker Research in Medicine

JoVE 59557

 Chemistry

Hyperpolarized 13C Metabolic Magnetic Resonance Spectroscopy and Imaging

1Department of Nuclear Medicine, Klinikum rechts der Isar, Technische Universität München, 2Department of Chemistry, Technische Universität München, 3GE Global Research, 4Zentralinstitut für Medizintechnik der Technischen Universität München (IMETUM), Technische Universität München, 5Institute for Biological and Medical Imaging (IBMI), Helmholtz Zentrum München, 6IDG Institute of Developmental Genetics, Helmholtz Zentrum München

JoVE 54751

 Cancer Research
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