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Ostracism: Effects of Being Ignored Over the Internet

JoVE 10336

Source: Peter Mende-Siedlecki & Jay Van Bavel—New York University


Social ostracism is defined as being ignored and excluded in the presence of others. This experience is a pervasive and powerful social phenomenon, observed in both animals and humans, throughout all stages of human development, and across all manner of dyadic…

 Social Psychology

Cyclic Voltammetry (CV)

JoVE 5502

Source: Laboratory of Dr. Kayla Green — Texas Christian University


A Cyclic Voltammetry (CV) experiment involves the scan of a range of potential voltages while measuring current. In the CV experiment, the potential of an immersed, stationary electrode is scanned from a predetermined starting potential to a final value (called the…

 Analytical Chemistry

Propulsion and Thrust

JoVE 10398

Source: Alexander S Rattner; Department of Mechanical and Nuclear Engineering, The Pennsylvania State University, University Park, PA


Aircraft, rockets, and ships produce propulsion by accelerating surrounding fluid or high temperature combustion products to high velocity. Because of the principle of conservation of momentum, the increased …

 Mechanical Engineering

Molecular Orbital (MO) Theory

JoVE 10447

Source: Tamara M. Powers, Department of Chemistry, Texas A&M University


This protocol serves as a guide in the synthesis of two metal complexes featuring the ligand 1,1'-bis(diphenylphosphino)ferrocene (dppf): M(dppf)Cl2, where M = Ni or Pd. While both of these transition metal complexes are 4-coordinate, they exhibit different…

 Inorganic Chemistry

Imaging Biological Samples with Optical and Confocal Microscopy

JoVE 10476

Source: Peiman Shahbeigi-Roodposhti and Sina Shahbazmohamadi, Biomedical Engineering Department, University of Connecticut, Storrs, Connecticut


Optical microscopes have been around for centuries, and while they reached their theoretical limitation of resolution decades ago, new equipment and techniques, such as confocal…

 Biomedical Engineering

Kinetics of Addition Polymerization to Polydimethylsiloxane

JoVE 10369

Source: Kerry M. Dooley and Michael G. Benton, Department of Chemical Engineering, Louisiana State University, Baton Rouge, LA


Polymers are molecules consisting of many repeating monomer units that are chemically bonded into long chains. They exhibit a broad range of physical properties, which are affected by their chemical structure,…

 Chemical Engineering

Using fMRI to Dissect Moral Judgment

JoVE 10306

Source: William Brady & Jay Van Bavel—New York University


In examining the roles of reason and emotion in moral judgments, psychologists and philosophers alike point to the trolley dilemma and the footbridge dilemma. With the trolley dilemma, most people say that it is appropriate to pull a switch to stop a train from hitting…

 Social Psychology

Crystallization of Salicylic Acid via Chemical Modification

JoVE 10407

Source: Kerry M. Dooley and Michael G. Benton, Department of Chemical Engineering, Louisiana State University, Baton Rouge, LA


Processing of biochemicals involves unit operations such as crystallization, ultracentrifugation, membrane filtration, and preparative chromatography, all of which have in common the need to separate large from…

 Chemical Engineering

Fabrication of Anisotropic Polymeric Artificial Antigen Presenting Cells for CD8+ T Cell Activation

1Biomedical Engineering, Translational Tissue Engineering Center, Institute for Nanobiotechnology, Johns Hopkins University School of Medicine, 2Biomedical Engineering, Translational Tissue Engineering Center, Institute for Nanobiotechnology, Ophthalmology, Oncology, Neurosurgery, Materials Science and Engineering, Chemical and Biomolecular Engineering, and the Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine

JoVE 58332

 Environment
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