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The Journal of Visualized Experiments (JoVE) is a peer reviewed, PubMed-indexed video journal. Our mission is to increase the productivity of scientific research.

 
 
 
 
 
 

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Quantification and Size-profiling of Extracellular Vesicles <span style='display: none;'>Using Tunable Resistive Pulse Sensing</span>…

Quantification and Size-profiling of Extracellular Vesicles Using Tunable Resistive Pulse Sensing
Published 10/19/2014

Extracellular vesicles play important roles in physiological and pathological processes, including coagulation, immune responses, and cancer or as potential therapeutic agents in drug delivery or regenerative medicine. This protocol presents methods for the quantification and size characterization of isolated and non-isolated extracellular vesicles in various fluids using tunable resistive pulse sensing.

Using Microwave and Macroscopic Samples of Dielectric<span style='display: none;'> Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials</span>…

Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials
Published 9/26/2014

Disordered structures offer new mechanisms for forming photonic bandgaps and unprecedented freedom in functional-defect designs. To circumvent the computational challenges of disordered systems, we construct modular macroscopic samples of the new class of PBG materials and use microwaves to characterize their scale-invariant photonic properties, in an easy and inexpensive manner.

Synthesis and Characterization of Functionalized<span style='display: none;'> Metal-organic Frameworks</span>…

Synthesis and Characterization of Functionalized Metal-organic Frameworks
Published 9/05/2014

Synthesis, activation, and characterization of intentionally designed metal-organic framework materials is challenging, especially when building blocks are incompatible or unwanted polymorphs are thermodynamically favored over desired forms. We describe how applications of solvent-assisted linker exchange, powder X-ray diffraction in capillaries and activation via supercritical CO2 drying, can address some of these challenges.

Multimodal Optical Microscopy Methods Reveal Polyp Tissue<span style='display: none;'> Morphology and Structure in Caribbean Reef Building Corals</span>…

Multimodal Optical Microscopy Methods Reveal Polyp Tissue Morphology and Structure in Caribbean Reef Building Corals
Published 9/05/2014

An integrated suite of imaging techniques has been applied to determine polyp morphology and tissue structure in the Caribbean corals Montastraeaannularis and M. faveolata. Fluorescence, serial block face, and two-photon confocal laser scanning microscopy have identified lobate structure, polyp walls, and estimated chromatophore and zooxanthellae densities and distributions.

Optimized Negative Staining: a High-throughput Protocol for <span style='display: none;'>Examining Small and Asymmetric Protein Structure by Electron Microscopy</span>…

Optimized Negative Staining: a High-throughput Protocol for Examining Small and Asymmetric Protein Structure by Electron Microscopy
Published 8/15/2014

More than half of proteins are small proteins (molecular mass <200 kDa) that are challenging for both electron microscope imaging and three-dimensional reconstructions. Optimized negative staining is a robust and high-throughput protocol to obtain high contrast and relatively high resolution (~1 nm) images of small asymmetric proteins or complexes under different physiological conditions.

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