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 JoVE Genetics

Parallel Measurement of Circadian Clock Gene Expression and Hormone Secretion in Human Primary Cell Cultures

1Department of Medical Specialties, Division of Endocrinology, Diabetes, Hypertension and Nutrition, Diabetes Center, University of Geneva Medical School, Institute of Genetics and Genomics in Geneva (iGE3), 2Population Epidemiology Unit (UEP), Community Medicine, Geneva University Hospital

JoVE 54673

 JoVE Behavior

Simultaneous Transcranial Alternating Current Stimulation and Functional Magnetic Resonance Imaging

1Department of Cognitive Neurology, University Medicine Goettingen, 2Department of Neurology, University Medicine Goettingen, 3German Primate Center, Leibniz Institute for Primate Research, 4DFG Center for Nanoscale Microscopy & Molecular Physiology of the Brain (CNMPB)

JoVE 55866

 JoVE Biology

Implementation of a Coherent Anti-Stokes Raman Scattering (CARS) System on a Ti:Sapphire and OPO Laser Based Standard Laser Scanning Microscope

1INSERM U1051, Institut des Neurosciences de Montpellier (INM), Université de Montpellier, 2Université de Nîmes, 3CNRS, IES, UMR 5214, 4Aix-Marseille Université, CNRS, École Centrale Marseille, Institut Fresnel, UMR 7249, 5Montpellier RIO Imaging (MRI)

JoVE 54262

 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 Biology

Combining Single-molecule Manipulation and Imaging for the Study of Protein-DNA Interactions

1LENS - European Laboratory for Non-linear Spectroscopy, University of Florence, 2Chemistry Research Laboratory, University of Oxford, 3Department of Biology, University of Florence, 4Department of Physics and Astronomy, University of Florence, 5National Institute of Optics-National Research Council, Italy, 6International Center of Computational Neurophotonics

JoVE 51446

 JoVE Biology

Multifunctional, Micropipette-based Method for Incorporation And Stimulation of Bacterial Mechanosensitive Ion Channels in Droplet Interface Bilayers

1Department of Mechanical Engineering, Virginia Polytechnic Institute and State University, 2School of Biomedical Engineering and Sciences, Virginia Polytechnic Institute and State University, 3Department of Biology, University of Maryland, 4College of Engineering, University of Georgia, 5Department of Engineering Sciences and Mechanics, Virginia Polytechnic Institute and State University

JoVE 53362

 Science Education: Essentials of Physics I

Hooke's Law and Simple Harmonic Motion

JoVE Science Education

Source: Ketron Mitchell-Wynne, PhD, Asantha Cooray, PhD, Department of Physics & Astronomy, School of Physical Sciences, University of California, Irvine, CA

Potential energy is an important concept in physics. Potential energy is the energy associated with forces that depend upon the position of an object relative to its surroundings. Gravitational potential energy, which is discussed in another video, is the energy associated that is directly proportional to the height of an object above the ground. Similarly, it is possible to define spring potential energy, which is directly proportional to the displacement of a spring from its relaxed state. A stretched or compressed spring has potential energy, as it has the ability to do work upon an object. The “ability to do work” is often quoted as the fundamental definition of energy. This video will demonstrate the potential energy stored in springs. It will also verify the restoring force equation of springs, or Hooke’s Law. The spring constant is different for springs of different elasticities. Hooke’s law will be verified and the spring constant measured by attaching varying weights to a suspended spring and measuring the resulting displacements.

 JoVE In-Press

Preparation of Liquid Crystal Networks for Macroscopic Oscillatory Motion Induced by Light

1Institute for Complex Molecular Systems (ICMS), Technical University of Eindhoven, 2Department of Chemical Engineering and Chemistry- Laboratory of Macromolecular and Organic Chemistry, Technical University of Eindhoven, 3Department of Chemical Engineering and Chemistry- Laboratory for Functional Organic Materials and Devices (SFD), Technical University of Eindhoven

Video Coming Soon

JoVE 56266

 JoVE Bioengineering

Harmonic Nanoparticles for Regenerative Research

1Department of Pathology and Immunology, Faculty of Medicine, University of Geneva, 2Physics Department, GAP-Biophotonics, University of Geneva, 3Laboratoire d'Optique Biomédicale (LOB), Faculté des Sciences et Techniques de l'Ingénieur, École Polytechnique Fédérale de Lausanne, 4Department of Clinical Medicine, School of Medicine, Trinity College Dublin, 5School of Medicine and CRANN, Trinity College Dublin, 6Nikon AG Instruments

JoVE 51333

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