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General Laboratory Techniques

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Basic Methods in Cellular and Molecular Biology

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Model Organisms I

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 JoVE Biology

Viability Assays for Cells in Culture

1Division of Pharmaceutical Sciences, Mylan School of Pharmacy, Duquesne University


JoVE 50645

Therapeutic compounds are often first examined in vitro with viability assays. Blind cell counts by a human observer can be highly sensitive to small changes in cell number but do not assess function. Computerized viability assays, as described here, can assess both structure and function in an objective manner.

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 JoVE Applied Physics

Proton Transfer and Protein Conformation Dynamics in Photosensitive Proteins by Time-resolved Step-scan Fourier-transform Infrared Spectroscopy

1Experimental Molecular Biophysics, Freie Universität Berlin


JoVE 51622

Key steps of protein function, in particular backbone conformational changes and proton transfer reactions, often take place in the microsecond to millisecond time scale. These dynamical processes can be studied by time-resolved step-scan Fourier-transform infrared spectroscopy, in particular for proteins whose function is triggered by light.

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 JoVE Neuroscience

Whole Cell Patch Clamp for Investigating the Mechanisms of Infrared Neural Stimulation

1Biotactical Engineering, Faculty of Engineering and Industrial Science, Swinburne University of Technology, 2Department of Otolaryngology, The University of Melbourne


JoVE 50444

Infrared nerve stimulation has been proposed as an alternative to electrical stimulation in a range of nerve types, including those associated with the auditory system. This protocol describes a patch clamp method for studying the mechanism of infrared nerve stimulation in a culture of primary auditory neurons.

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 JoVE Chemistry

In Situ SIMS and IR Spectroscopy of Well-defined Surfaces Prepared by Soft Landing of Mass-selected Ions

1Physical Sciences Division, Pacific Northwest National Laboratory


JoVE 51344

Soft landing of mass-selected ions onto surfaces is a powerful approach for the highly-controlled preparation of novel materials. Coupled with analysis by in situ secondary ion mass spectrometry (SIMS) and infrared reflection absorption spectroscopy (IRRAS), soft landing provides unprecedented insights into the interactions of well-defined species with surfaces.

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 JoVE Biology

The Fastest Western in Town: A Contemporary Twist on the Classic Western Blot Analysis

1Diller Cancer Research Building, University of California, San Francisco


JoVE 51149

This protocol explores the latest advancements in performing Western blot analyses. These novel modifications employ a Bis-Tris gel system with a 35 min electrophoresis run time, a 7 min dry blotting transfer system, and infrared fluorescent protein detection and imaging that generates higher resolution, quality, sensitivity, and improved accuracy of Western data.

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 JoVE Biology

A Video Demonstration of Preserved Piloting by Scent Tracking but Impaired Dead Reckoning After Fimbria-Fornix Lesions in the Rat

1Department of Neuroscience, Canadian Centre for Behavioural Neuroscience, University of Lethbridge


JoVE 1193

In a piloting scent tracking task, the ability of the rats to return to a refuge with food using visual an odor trail or using dead reckoning in infrared light, the integrated record of previous movements, demonstrates that the hippocampus is necessary for dead reckoning.

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 JoVE Applied Physics

The Preparation of Electrohydrodynamic Bridges from Polar Dielectric Liquids

1Applied Water Physics, Wetsus - Centre of Excellence for Sustainable Water Technology, 2IRCAM GmbH, 3Institute for Thermal Turbomachinery and Machine Dynamics, Graz University of Technology


JoVE 51819

Horizontal and vertical electrohydrodynamic liquid bridges are simple and powerful tools for exploring the interaction of high intensity electric fields and polar dielectric liquids. The construction of basic apparatus and operational examples, including thermographic images, for three liquids (e.g., water, DMSO, and glycerol) is presented.

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 JoVE Chemistry

Exfoliation of Egyptian Blue and Han Blue, Two Alkali Earth Copper Silicate-based Pigments

1Department of Chemistry, The University of Georgia


JoVE 51686

The preparation and exfoliation of CaCuSi4O10 and BaCuSi4O10 are described. Upon stirring in hot water, CaCuSi4O10 spontaneously exfoliates into monolayers, whereas BaCuSi4O10 requires ultrasonication in organic solvents. Near infrared (NIR) imaging illustrates the NIR emission properties of these materials, and aqueous dispersions of these nanomaterials are useful for solution processing.

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 JoVE Behavior

Using Eye Movements to Evaluate the Cognitive Processes Involved in Text Comprehension

1Department of Psychology, University of Illinois at Chicago


JoVE 50780

The present article describes how to use eye tracking methodologies to study the cognitive processes involved in text comprehension. Descriptions of eye tracking equipment, how to develop experimental stimuli, and procedural recommendations are included. The information presented can be applied to most any study using verbal stimuli.

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 JoVE Immunology and Infection

Non-invasive Optical Imaging of the Lymphatic Vasculature of a Mouse

1Center for Molecular Imaging (CMI), University of Texas Health Science Center-Houston


JoVE 4326

Recently developed imaging techniques using near-infrared fluorescence (NIRF) may help elucidate the role the lymphatic system plays in cancer metastasis, immune response, wound repair, and other lymphatic-associated diseases.

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