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 JoVE Chemistry

Origami Inspired Self-assembly of Patterned and Reconfigurable Particles

1Department of Chemical and Biomolecular Engineering, The Johns Hopkins University, 2Department of Chemistry, The Johns Hopkins University


JoVE 50022

We describe experimental details of the synthesis of patterned and reconfigurable particles from two dimensional (2D) precursors. This methodology can be used to create particles in a variety of shapes including polyhedra and grasping devices at length scales ranging from the micro to centimeter scale.

 JoVE Biology

Testing Protozoacidal Activity of Ligand-lytic Peptides Against Termite Gut Protozoa in vitro (Protozoa Culture) and in vivo (Microinjection into Termite Hindgut)

1Department of Entomology, Louisiana State University Agricultural Center


JoVE 2190

We present procedures for demonstrating that ligands bind to the surface membrane of the cellulose-digesting protozoa in the gut of Formosan subterranean termites using fluorescent microscopy and that ligands coupled with lytic peptides kill these protozoa in vitro (anaerobic protozoa culture) and in vivo (injection into the termite hindgut).

 JoVE Biology

Chemotactic Response of Marine Micro-Organisms to Micro-Scale Nutrient Layers

1Environmental Microfluidics Group, MIT - Massachusetts Institute of Technology


JoVE 203

The fabrication of microfluidic channels and their implementation in experiments for studying the chemotactic foraging behaviour of marine microbes within a patchy nutrient seascape and the swimming behaviour of bacteria within shear flow are described.

 JoVE Biology

Characterization of the Isolated, Ventilated, and Instrumented Mouse Lung Perfused with Pulsatile Flow

1Department of Biomedical Engineering, University of Wisconsin – Madison


JoVE 2690

The following protocol outlines the process of isolating, ventilating and instrumenting mouse lungs to measure steady or pulsatile pulmonary vascular pressure-flow relationships in order to quantify the effects of blood flow, airflow, airway changes and vascular changes on right ventricular afterload.

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 JoVE Applied Physics

Experimental Measurement of Settling Velocity of Spherical Particles in Unconfined and Confined Surfactant-based Shear Thinning Viscoelastic Fluids

1Petroleum & Geosystems Engineering, The University of Texas at Austin


JoVE 50749

This paper demonstrates the experimental procedure to measure terminal settling velocities of spherical particles in surfactant-based shear thinning viscoelastic fluids. Fluids over a wide range of rheological properties are prepared and settling velocities are measured for a range of particle sizes in unbounded fluids and fluids between parallel walls.

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 JoVE Clinical and Translational Medicine

Flexible Colonoscopy in Mice to Evaluate the Severity of Colitis and Colorectal Tumors Using a Validated Endoscopic Scoring System

1Division of Gastroenterology, Case Western Reserve University School of Medicine, Cleveland, 2Department of Pathology, Case Western Reserve University School of Medicine, Cleveland, 3Digestive Health Research Center, Case Western Reserve University School of Medicine, Cleveland


JoVE 50843

Over the past few years, new generation endoscopes have emerged as important diagnostic research aids for evaluating murine colitis and colorectal tumors. We present herein a detailed protocol for endoscopic assessment of inflammation and colorectal tumors in mice, as well as a novel scoring system that uses decimal identifiers to document the endoscopic severity of colitis and colorectal tumors.

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 JoVE Bioengineering

High Throughput Single-cell and Multiple-cell Micro-encapsulation

1Department of Mechanical Engineering, Vanderbilt University


JoVE 4096

Combining monodisperse drop generation with inertial ordering of cells and particles, we describe a method to encapsulate a desired number of cells or particles in a single drop at kHz rates. We demonstrate efficiencies twice exceeding those of unordered encapsulation for single- and double-particle drops.

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 JoVE Biology

Aseptic Laboratory Techniques: Plating Methods

1Microbiology, Immunology, and Molecular Genetics, University of California, Los Angeles


JoVE 3064

When working with media and reagents used to culture microorganisms, aseptic technique must be practiced to ensure contamination is minimized. A variety of plating methods are routinely used to isolate, propagate, or enumerate bacteria and phage, all of which incorporate procedures that maintain the sterility of experimental materials.

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 JoVE Bioengineering

PLGA Nanoparticles Formed by Single- or Double-emulsion with Vitamin E-TPGS

1Barrow Brain Tumor Research Center, Barrow Neurological Institute


JoVE 51015

We describe the production and characterization of nanoparticles and microparticles composed of poly(lactic-co-glycolic acid) using vitamin E-TPGS as an emulsifier. By varying formulation parameters such as the concentration of emulsifier, it is possible to produce nanoparticles with mean diameters ranging from 220 nm to 1.98 µm.

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 JoVE Bioengineering

Intra-lymph Node Injection of Biodegradable Polymer Particles

1Fischell Department of Bioengineering, University of Maryland, College Park


JoVE 50984

Lymph nodes are the immunological tissues that orchestrate immune response and are a critical target for vaccines. Biomaterials have been employed to better target lymph nodes and to control delivery of antigens or adjuvants. This paper describes a technique combining these ideas to inject biocompatible polymer particles into lymph nodes.

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