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 JoVE Neuroscience

An Isolated Semi-intact Preparation of the Mouse Vestibular Sensory Epithelium for Electrophysiology and High-resolution Two-photon Microscopy

1Discipline of Biomedical Science, School of Medical Sciences, Sydney Medical School, University of Sydney, 2School of Biomedical Sciences and Pharmacy, University of Newcastle


JoVE 50471

Analysis of vestibular hair cell function is complicated by their location deep within the hardest part of the skull, the petrous temporal bone. Most functional hair cell studies have used acutely isolated hair cells. Here we describe a semi-intact preparation of mouse vestibular epithelium for electrophysiological and two-photon microscopy studies.

 JoVE General

Semi-automated Optical Heartbeat Analysis of Small Hearts

1Development and Aging Program, The Sanford Burnham Institute for Medical Research, 2Cardiac Electrophysiology Group, Dept. of Physiology, Anatomy and Genetics, The Sanford Burnham Institute for Medical Research, 3Biology Department and Heart Institute, San Diego State University


JoVE 1435

We have developed a Semi-automated Optical Heartbeat Analysis method (SOHA) for analyzing high speed optical recordings from Drosophila, zebrafish and embryonic mouse hearts. We demonstrate the application of our methodology to the analysis of heart function in fruit fly and embryonic mouse hearts.

 JoVE Bioengineering

In vitro Assembly of Semi-artificial Molecular Machine and its Use for Detection of DNA Damage

1Neurosurgery, Baylor College of Medicine, 2Michael E. DeBakey Veterans Affairs Medical Center, 3Molecular & Cellular Biology, Baylor College of Medicine


JoVE 3628

We demonstrate the assembly and application of a molecular-scale device powered by a topoisomerase protein. The construct is a bio-molecular sensor which labels two major types of DNA breaks in tissue sections by attaching two different fluorophores to their ends.

 JoVE General

LeafJ: An ImageJ Plugin for Semi-automated Leaf Shape Measurement

1Department of Plant Biology, University of California Davis


JoVE 50028

Demonstration of key methods for high throughput leaf measurements. These methods can be used to accelerate leaf phenotyping when studying many plant mutants or otherwise screening plants by leaf phenotype.

 JoVE Applied Physics

Dry Oxidation and Vacuum Annealing Treatments for Tuning the Wetting Properties of Carbon Nanotube Arrays

1Graduate Aeronautical Laboratories, California Institute of Technology


JoVE 50378

This article describes a simple method to fabricate vertically aligned carbon nanotube arrays by CVD and to subsequently tune their wetting properties by exposing them to vacuum annealing or dry oxidation treatment.

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 JoVE General

A Semi-quantitative Approach to Assess Biofilm Formation Using Wrinkled Colony Development

1Department of Microbiology and Immunology, Loyola University Medical Center


JoVE 4035

We provide a simple, semi-quantitative method to investigate biofilm formation in vitro. This method takes advantage of the Zeiss stemi 2000-C Dissecting Microscope (with camera attachment) to monitor both the timing and pattern of biofilm formation, as assessed by the development of wrinkled colonies.

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 JoVE Neuroscience

A Rapid Approach to High-Resolution Fluorescence Imaging in Semi-Thick Brain Slices

1Department of Molecular & Human Genetics, Baylor College of Medicine (BCM), 2Precisionary Instruments Inc., 3Departments of Molecular & Human Genetics and Neuroscience, Baylor College of Medicine (BCM), 4Jan and Dan Duncan Neurological Research Institute, Texas Children's Hospital


JoVE 2807

Here we describe a rapid and simple method to image fluorescently labeled cells in semi-thick brain slices. By fixing, slicing, and optically clearing brain tissue we describe how standard epifluorescent or confocal imaging can be used to visualize individual cells and neuronal networks within intact nervous tissue.

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 JoVE Neuroscience

Optogenetic Perturbation of Neural Activity with Laser Illumination in Semi-intact Drosophila Larvae in Motion

1Department of Complexity Science and Engineering, Graduate School of Frontier Sciences, The University of Tokyo, 2Department of Physics, Graduate School of Science, The University of Tokyo


JoVE 50513

Here we describe a protocol for optogenetic manipulation of motoneuronal activity while monitoring changes in motor output (muscle contraction) in semi-intact Drosophila larvae using lasers within a conventional confocal microscope. This technique enables researchers to achieve local perturbation of neural activity in a few neuromeres to elucidate the dynamics of motor circuits.

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 JoVE General

Screening for Amyloid Aggregation by Semi-Denaturing Detergent-Agarose Gel Electrophoresis

1Whitehead Institute for Biomedical Research, 2Department of Biology, MIT - Massachusetts Institute of Technology, 3Howard Hughes Medical Institute


JoVE 838

SDD-AGE is a useful technique for the detection and characterization of amyloid-like polymers in cells. Here we demonstrate an adaptation that makes this technique amenable to large-scale applications.

 JoVE General

A Quantitative Assay for Insulin-expressing Colony-forming Progenitors

1Department of Biotechnology & Bioinformatics, California State University Channel Islands, 2Department of Diabetes, Endocrinology and Metabolism, Beckman Research Institute of City of Hope, 3The Irell & Manella Graduate School of Biological Sciences, Beckman Research Institute of City of Hope


JoVE 3148

A three-dimensional clonogenic assay that allows pancreatic-like progenitors to differentiate into insulin-expressing colonies is described. This method takes advantage of semi-solid media containing methylcellulose, Matrigel and growth factors, in which single progenitors proliferate and differentiate in vitro, permitting quantification of the number of functional progenitors in a population.

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