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Sodium Azide: A cytochrome oxidase inhibitor which is a nitridizing agent and an inhibitor of terminal oxidation. (From Merck Index, 12th ed)
 Science Education: Essentials of Environmental Science

Dissolved Oxygen in Surface Water

JoVE Science Education

Source: Laboratories of Margaret Workman and Kimberly Frye - Depaul University

Dissolved oxygen (DO) measurements calculate the amount of gaseous oxygen dissolved in surface water, which is important to all oxygen-breathing life in river ecosystems, including fish species preferred for human consumption (e.g. bluegill and bass), as well as decomposer species critical to the recycling of biogeochemical materials in the system. The oxygen dissolved in lakes, rivers, and oceans is crucial for the organisms and creatures living in it. As the amount of dissolved oxygen drops below normal levels in water bodies, the water quality is harmed and creatures begin to die. In a process called eutrophication, a body of water can become hypoxic and will no longer be able to support living organisms, essentially becoming a “dead zone.” Eutrophication occurs when excess nutrients cause algae populations to grow rapidly in an algal bloom. The algal bloom forms dense mats at the surface of the water blocking out two essential inputs of oxygen for water: gas exchange from the atmosphere and photosynthesis in the water due to the lack of light below the mats. As dissolved oxygen levels decline below the surface, oxygen-breathing organisms die-off in large amounts, creati

 JoVE Immunology and Infection

Developing a Salivary Antibody Multiplex Immunoassay to Measure Human Exposure to Environmental Pathogens

1National Exposure Research Laboratory, U.S. Environmental Protection Agency, 2National Risk Management Research Laboratory, U.S. Environmental Protection Agency, 3Oak Ridge Institute for Science and Education, 4Department of Biological Sciences, McMicken College of Arts and Sciences, University of Cincinnati


JoVE 54415

 JoVE Immunology and Infection

Human Lung Dendritic Cells: Spatial Distribution and Phenotypic Identification in Endobronchial Biopsies Using Immunohistochemistry and Flow Cytometry

1Immunology and Allergy Unit, Department of Medicine Solna, Karolinska Institutet, 2Division of Medicine, Department of Public Health and Clinical Medicine, Umeå University, 3Divison of Infectious Diseases, Department of Clinical Microbiology, Umeå University


JoVE 55222

 JoVE Immunology and Infection

A Semi-automated Approach to Preparing Antibody Cocktails for Immunophenotypic Analysis of Human Peripheral Blood

1Human Immune Monitoring Laboratory, Earle A. Chiles Research Institute, Providence Cancer Center, Providence Portland Medical Center, 2Sony Biotechnology, 3Beckman Coulter, Inc. Life Sciences, 4Bristol-Myers Squibb


JoVE 53485

 JoVE Chemistry

Isolation and Preparation of Bacterial Cell Walls for Compositional Analysis by Ultra Performance Liquid Chromatography

1Department of Bioengineering, Stanford University, 2Department of Molecular Biology and Laboratory for Molecular Infection Medicine Sweden, Umeå Centre for Microbial Research, Umeå University, 3Campus de Cantoblanco, Universidad Autonoma de Madrid, 4Department of Microbiology and Immunology, Stanford University School of Medicine


JoVE 51183

 JoVE In-Press

Using a Whole-mount Immunohistochemical Method to Study the Innervation of the Biliary Tract in Suncus Murinus

1Department of Frontier Health Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University, 2Department of Anatomy, Tokyo Medical University, 3Area of Regulatory Biology, Division of Life Science, Graduate School of Science and Engineering, Saitama University

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JoVE 55483

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