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Magnetic Fields: Areas of attractive or repulsive force surrounding Magnets.
 JoVE Engineering

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples

1Advanced Vision System Research Section, Electronics & Telecommunication Research Institute (ETRI), 2Intelligent Cognitive Technology Research Department, Electronics & Telecommunication Research Institute (ETRI), 3Peter Grünberg Institute (PGI-8), Forschungszentrum Jülich


JoVE 53869

 JoVE Bioengineering

Cell Labeling and Targeting with Superparamagnetic Iron Oxide Nanoparticles

1Division of Cardiovascular Diseases, Mayo Clinic, 2Division of Engineering, Mayo Clinic, 3School of Medicine, Pharmacy and Health, Durham University, 4Regional Center for Applied Molecular Oncology, Masaryk Memorial Cancer Institute, 5Mayo Clinic College of Medicine, Mayo Clinic


JoVE 53099

 JoVE Bioengineering

A Novel Stretching Platform for Applications in Cell and Tissue Mechanobiology

1Centre for Interdisciplinary NanoPhysics, Department of Physics, University of Ottawa, 2University of Ottawa Heart Institue, University of Ottawa, 3Libin Cardiovascular Institute of Alberta, University of Calgary, 4Department of Biology, University of Ottawa, 5Institute for Science, Society and Policy, University of Ottawa


JoVE 51454

 JoVE Neuroscience

The Use of Magnetic Resonance Spectroscopy as a Tool for the Measurement of Bi-hemispheric Transcranial Electric Stimulation Effects on Primary Motor Cortex Metabolism

1Department of Psychology, University of Montréal, 2Montreal Neurological Institute, McGill University, 3Center for Magnetic Resonance Research and Department of Radiology, University of Minnesota


JoVE 51631

 JoVE Immunology and Infection

Monitoring Dendritic Cell Migration using 19F / 1H Magnetic Resonance Imaging

1Experimental and Clinical Research Center, A joint cooperation between the Charité Medical Faculty and the Max Delbrück Center for Molecular Medicine, 2Berlin Ultrahigh Field Facility (B.U.F.F.), Max Delbrück Center for Molecular Medicine


JoVE 50251

 JoVE Bioengineering

Fabrication of a Functionalized Magnetic Bacterial Nanocellulose with Iron Oxide Nanoparticles

1Department of Bioengineering, University of Illinois at Urbana-Champaign, 2Department of Nuclear, Plasma and Radiological Engineering, University of Illinois at Urbana-Champaign, 3Micro and Nanotechnology Laboratory, University of Illinois at Urbana-Champaign, 4Program of Study and Control of Tropical Diseases (PECET), University of Antioquia, 5Sealy Center for Vaccine Development, University of Texas Medical Branch, 6WHO Collaborating Center for Vaccine Research, Evaluation and Training on Emerging Infectious Diseases, University of Texas Medical Branch, 7Beckman Institute, University of Illinois at Urbana-Champaign


JoVE 52951

 Science Education: Essentials of General Chemistry

Using a pH Meter

JoVE Science Education

Source: Laboratory of Dr. Zhongqi He - United States Department of Agriculture

Acids and bases are substances capable of donating protons (H+) and hydroxide ions (OH-), respectively. They are two extremes that describe chemicals. Mixing acids and bases can cancel out or neutralize their extreme effects. A substance that is neither acidic nor basic is neutral. The values of proton concentration ([H+]) for most solutions are inconveniently small and difficult to compare so that a more practical quantity, pH, has been introduced. pH was originally defined as the decimal logarithm of the reciprocal of the molar concentration of protons , but was updated to the decimal logarithm of the reciprocal of the hydrogen ion activity . The former definition is now occasionally expressed as p[H]. The difference between p[H] and pH is quite small. It has been stated that pH = p[H] + 0.04. It is common practice to use the term 'pH' for both types of measurements. The pH scale typically ranges from 0 to 14. For a 1 M solution of a strong acid, pH=0 and for a 1 M solution of a strong base, pH=14. Thus, measured pH values will lie mostly in the rang

 JoVE Neuroscience

Functional Imaging of Auditory Cortex in Adult Cats using High-field fMRI

1Department of Physiology and Pharmacology, University of Western Ontario, 2Department of Psychology, University of Western Ontario, 3Department of Medical Biophysics, University of Western Ontario, 4Brain and Mind Institute, University of Western Ontario, 5Centre for Functional and Metabolic Mapping, Robarts Research Institute, University of Western Ontario, 6Cerebral Systems Laboratory, University of Western Ontario, 7National Centre for Audiology, University of Western Ontario


JoVE 50872

 JoVE Engineering

Sputter Growth and Characterization of Metamagnetic B2-ordered FeRh Epilayers

1School of Physics and Astronomy, University of Leeds, 2Institute of Materials Research, University of Leeds, 3School of Chemistry, University of Edinburgh, 4Department of Chemical Engineering, Northeastern University, 5Department of Physics, Northeastern University


JoVE 50603

 Science Education: Essentials of Organic Chemistry

Nuclear Magnetic Resonance (NMR) Spectroscopy

JoVE Science Education

Source: Laboratory of Dr. Henrik Sundén – Chalmers University of Technology

Nuclear magnetic resonance (NMR) spectroscopy is a vital analysis technique for organic chemists. With the help of NMR, the work in the organic lab has been facilitated tremendously. Not only can it provide information about the structure of a molecule but also determine the content and purity of a sample. Compared with other commonly encountered techniques for organic chemists — such as thermal analysis and mass spectrometry (MS) — NMR is a non-destructive method that is valuable when recovery of the sample is important. One of the most frequently used NMR techniques for an organic chemist is proton (1H) NMR. The protons present in a molecule will behave differently depending on its surrounding chemical environment, making it possible to elucidate its structure. Moreover, it is possible to monitor the completion of a reaction by comparing NMR spectra of the starting material to that of the final product. This video exemplifies how NMR spectroscopy can be used in the everyday work of an organic chemist. The following will be shown: i) preparation of an NMR sample. ii) Using 1H NMR to monitor a reaction. iii) Identifying the product obtained from

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