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Leukotriene C4: The conjugation product of Leukotriene a4 and glutathione. It is the major arachidonic acid metabolite in macrophages and human mast cells as well as in antigen-sensitized lung tissue. It stimulates mucus secretion in the lung, and produces contractions of nonvascular and some Vascular smooth muscle. (From Dictionary of Prostaglandins and Related Compounds, 1990)
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Coordinate Mapping of Hyolaryngeal Mechanics in Swallowing

1Medical College of Georgia, Georgia Regents University, 2Department of Communicative Sciences and Disorders, New York University, 3Department of Cellular Biology & Anatomy, Georgia Regents University, 4Department of Otolaryngology, Georgia Regents University

JoVE 51476


 Medicine

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The Use of Magnetic Resonance Spectroscopy as a Tool for the Measurement of Bi-hemispheric Transcranial Electric Stimulation Effects on Primary Motor Cortex Metabolism

1Department of Psychology, University of Montréal, 2Montreal Neurological Institute, McGill University, 3Center for Magnetic Resonance Research and Department of Radiology, University of Minnesota

JoVE 51631


 Neuroscience

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Using Multi-fluorinated Bile Acids and In Vivo Magnetic Resonance Imaging to Measure Bile Acid Transport

1Department of Surgery, University of Maryland School of Medicine, 2Department of Medicine, University of Maryland School of Medicine, 3Department of Radiology, University of Maryland School of Medicine, 4Food and Drug Administration, 5Department of Pharmaceutical Sciences, University of Maryland School of Pharmacy, 6VA Maryland Health Care System

JoVE 54597


 Medicine

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Simultaneous EEG Monitoring During Transcranial Direct Current Stimulation

1Programa de Pós-Graduação em Ciências Médica, Universidade Federal do Rio Grande do Sul, 2Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES), 3Laboratory of Neuromodulation, Department of Physical Medicine & Rehabilitation, Spaulding Rehabilitation Hospital and Massachusetts General Hospital, Harvard Medical School, 4De Montfort University

JoVE 50426


 Behavior

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A Novel Vertebral Stabilization Method for Producing Contusive Spinal Cord Injury

1Spinal Cord and Brain Injury Research Group, Stark Neurosciences Research Institute, Department of Neurological Surgery and Goodman and Campbell Brain and Spine, Indiana University School of Medicine, 2Medical Neuroscience Graduate Program, Indiana University School of Medicine, 3Department of Anatomy and Cell Biology, Indiana University School of Medicine, 4Norton Neuroscience Institute, Norton Healthcare

JoVE 50149


 Medicine

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High-Performance Liquid Chromatography (HPLC)

JoVE 10156

Source: Dr. Paul Bower - Purdue University

High-performance liquid chromatography (HPLC) is an important analytical method commonly used to separate and quantify components of liquid samples. In this technique, a solution (first phase) is pumped through a column that contains a packing of small porous particles with a second phase bound to the surface. The different solubilities of the sample components in the two phases cause the components to move through the column with different average velocities, thus creating a separation of these components. The pumped solution is called the mobile phase, while the phase in the column is called the stationary phase. There are several modes of liquid chromatography, depending upon the type of stationary and/or mobile phase employed. This experiment uses reversed-phase chromatography, where the stationary phase is non-polar, and the mobile phase is polar. The stationary phase to be employed is C18 hydrocarbon groups bonded to 3-µm silica particles, while the mobile phase is an aqueous buffer with a polar organic modifier (acetonitrile) added to vary its eluting strength. In this form, the silica can be used for samples that are water-soluble, providing a broad range of applications. In this experiment, the mixtures of three components frequently found


 Essentials of Analytical Chemistry

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Neck Exam

JoVE 10180

Source: Robert E. Sallis, MD. Kaiser Permanente, Fontana, California, USA

Examination of the neck can be a challenge because of the many bones, joints, and ligaments that make up the underlying cervical spine. The cervical spine is composed of seven vertebrae stacked in gentle C-shaped curve. The anterior part of each vertebra is made up of the thick bony body, which is linked to the body above and below by intervertebral discs. These discs help provide stability and shock absorption to the cervical spine. The posterior elements of the vertebra, which include the laminae, transverse, and spinous processes and the facet joints, form a protective canal for the cervical spinal cord and its nerve roots. The cervical spine supports the head and protects the neural elements as they come from the brain and from the spinal cord. Therefore, injuries or disorders affecting the neck can also affect the underlying spinal cord and have potentially catastrophic consequences. The significant motion that occurs in the neck places the cervical spine at increased risk for injury and degenerative changes. The cervical spine is also a common source of radicular pain in the shoulder. For this reason, the neck should be evaluated as a routine part of every shoulder exam.


 Essentials of Physical Examinations III

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Optimized Protocol for the Extraction of Proteins from the Human Mitral Valve

1Centro Cardiologico Monzino IRCCS, 2Cardiovascular Tissue Bank of Milan, Centro Cardiologico Monzino IRCCS, 3Department of Clinical Sciences and Community Health, Cardiovascular Section, University of Milan, 4Department of Cardiovascular Disease, Development and Innovation Cardiac Surgery Unit, Centro Cardiologico Monzino IRCCS

JoVE 55762


 Biochemistry

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