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General Laboratory Techniques

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Basic Methods in Cellular and Molecular Biology

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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 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 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 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 Neuroscience

Using MazeSuite and Functional Near Infrared Spectroscopy to Study Learning in Spatial Navigation

1School of Biomedical Engineering, Science and Health Systems, Drexel University, 2College of Nursing and Health Professions, Drexel University


JoVE 3443

MazeSuite is a complete toolset to prepare, present and analyze navigational and spatial experiments. Functional near-infrared spectroscopy (fNIR) is an optical brain imaging technique that enables noninvasive and portable monitoring of cerebral blood oxygenation changes. This paper summarizes collective use of MazeSuite and fNIR within a cognitive processing learning paradigm.

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 JoVE Applied Physics

Fabrication of Uniform Nanoscale Cavities via Silicon Direct Wafer Bonding

1Department of Physics, The State University of New York at Buffalo, 2Joint Quantum Institute, University of Maryland, 3The National Institute of Standards and Technology, 4Cryogenics and Fluids Branch, NASA Goddard Space Flight Center, 5HRL Laboratories


JoVE 51179

A method for permanently bonding two silicon wafers so as to realize a uniform enclosure is described. This includes wafer preparation, cleaning, RT bonding, and annealing processes. The resulting bonded wafers (cells) have uniformity of enclosure ~1%1,2. The resulting geometry allows for measurements of confined liquids and gasses.

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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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 JoVE Neuroscience

Long-term Behavioral Tracking of Freely Swimming Weakly Electric Fish

1Department of Physics, University of Ottawa, 2Department of Cellular and Molecular Medicine, University of Ottawa, 3Centre for Neural Dynamics, University of Ottawa


JoVE 50962

We describe a set of techniques for studying spontaneous behavior of freely swimming weakly electric fish over an extended period of time, by synchronously measuring the animal's electric organ discharge timing, body position and posture both accurately and reliably in a specially designed aquarium tank inside a sensory isolation chamber.

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 JoVE Applied Physics

In-situ Tapering of Chalcogenide Fiber for Mid-infrared Supercontinuum Generation

1Edward L. Ginzton Laboratory, Stanford University


JoVE 50518

We describe a method for in-situ tapering of As2S3 fibers to achieve efficient mid-infrared supercontinuum generation. By tapering while monitoring the supercontinuum’s spectrum, the spectral width can be maximized for a fiber taper. In-situ fiber tapering can be applied to optimize the performance of other fiber-based devices.

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