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 JoVE Biology

Separation of Spermatogenic Cell Types Using STA-PUT Velocity Sedimentation

1Department of Cell and Developmental Biology, University of Pennsylvania, 2Biomedical Graduate Studies, University of Pennsylvania, 3Department of Animal Biology and Center for Animal Transgenesis and Germ Cell Research, University of Pennsylvania, 4Department of Genetics, University of Pennsylvania, 5Department of Biology, University of Pennsylvania


JoVE 50648

 JoVE Biology

Simple and Efficient Technique for the Preparation of Testicular Cell Suspensions

1Departamento de Biología Molecular, Instituto de Investigaciones Biológicas Clemente Estable (IIBCE), 2Servicio de Citometría de Flujo y Clasificación Celular (SECIF), Instituto de Investigaciones Biológicas Clemente Estable, 3Sección Bioquímica, Facultad de Ciencias, Universidad de la República


JoVE 50102

 JoVE Developmental Biology

A Standardized Approach for Multispecies Purification of Mammalian Male Germ Cells by Mechanical Tissue Dissociation and Flow Cytometry

1Department of Genetics, Washington University School of Medicine, 2Graduate Program in Areas of Basic and Applied Biology (GABBA), Abel Salazar Institute of Biomedical Sciences, University of Porto, 3Instituto de Investigação e Inovação em Saúde, University of Porto, 4IPATIMUP - Instituto de Patologia e Imunologia Molecular da Universidade do Porto, 5Department of Pathology & Immunology, Washington University School of Medicine


JoVE 55913

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 JoVE Immunology and Infection

Radial Mobility and Cytotoxic Function of Retroviral Replicating Vector Transduced, Non-adherent Alloresponsive T Lymphocytes

1Department of Neurosurgery, UCLA David Geffen School of Medicine, 2Department of Molecular and Medical Pharmacology, UCLA David Geffen School of Medicine, 3Department of Medicine, UCLA David Geffen School of Medicine, 4Brain Research Institute, UCLA David Geffen School of Medicine, 5Jonsson Comprehensive Cancer Center, UCLA David Geffen School of Medicine


JoVE 52416

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 Science Education: Essentials of Physics I

Kinematics and Projectile 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

This experiment demonstrates the kinematics of motion in 1 and 2 dimensions. This lab will begin by studying motion in 1 dimension, under constant acceleration, by launching a projectile directly upward and measuring the maximum height reached. This lab will verify that the maximum height reached is consistent with the kinematic equations derived below. Motion in 2 dimensions will be demonstrated by launching the ball at an angle θ. Using the kinematic equations below, one can predict the distance to where the projectile will land based upon the initial speed, total time, and angle of trajectory. This will demonstrate kinematic motion with and with out acceleration in the y- and x-directions, respectively.

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 Science Education: Essentials of Physics II

Electric Charge in a Magnetic Field

JoVE Science Education

Source: Andrew Duffy, PhD, Department of Physics, Boston University, Boston, MA

This experiment duplicates J.J. Thomson's famous experiment at the end of the 19th century, in which he measured the charge-to-mass ratio of the electron. In combination with Robert A. Millikan's oil-drop experiment a few years later that produced a value for the charge of the electron, the experiments enabled scientists to find, for the first time, both the mass and the charge of the electron, which are key parameters for the electron. Thomson was not able to measure the electron charge or the electron mass separately, but he was able to find their ratio. The same is true for this demonstration; although here there is the advantage of being able to look up the values for the magnitude of the charge on the electron(e) and the mass of the electron (me), which are now both known precisely.

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