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Water Quality: A rating of a body of water based on measurable physical, chemical, and biological characteristics.

Water Quality Analysis via Indicator Organisms

JoVE 10025

Source: Laboratories of Dr. Ian Pepper and Dr. Charles Gerba - Arizona University
Demonstrating Author: Luisa Ikner


Water quality analysis monitors anthropogenic influences such as pollutants, nutrients, pathogens, and any other constituent that can impact the water’s integrity as a resource. Fecal contamination contributes…

 Environmental Microbiology

Turbidity and Total Solids in Surface Water

JoVE 10015

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


Turbidity and total solids are related measurements addressing clarity of surface waters. Turbidity is an indirect measure of water clarity that determines the amount of light that can pass through the water. Total solids is a direct measurement of solid…

 Environmental Science

Dissolved Oxygen in Surface Water

JoVE 10016

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),…

 Environmental Science

Isolation of Fecal Bacteria from Water Samples by Filtration

JoVE 10213

Source: Laboratories of Dr. Ian Pepper and Dr. Charles Gerba - Arizona University
Demonstrating Author: Luisa Ikner


The quality of water destined for use in agricultural, recreational, and domestic settings is of great importance due to the potential for outbreaks of waterborne disease. Microbial agents implicated in such events…

 Environmental Microbiology

Nutrients in Aquatic Ecosystems

JoVE 10023

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


Nitrogen and phosphorus are essential plant nutrients found in aquatic ecosystems and both are monitored as a part of water quality testing because in excess amounts they can cause significant water quality problems. 


 Environmental Science

Community Diversity- Concept

JoVE 10607

Populations do not live in isolation; thus, every population interacts with others in certain ways. These interactions give rise to a network of populations. Hence, an ecological community is composed of such population networks of various species interacting with each other within the same area. These biological, or biotic, components may also closely interact with non-living, or abiotic,…

 Lab Bio

Zebrafish Maintenance and Husbandry

JoVE 5152

The zebrafish (Danio rerio) is a powerful vertebrate model system for studying development, modeling disease, and screening for novel therapeutics. Due to their small size, large numbers of zebrafish can be housed in the laboratory at low cost. Although zebrafish are relatively easy to maintain, special consideration must be given to both diet and water quality to in order to optimize …

 Biology II

Algae Enumeration via Culturable Methodology

JoVE 10154

Source: Laboratories of Dr. Ian Pepper and Dr. Charles Gerba - Arizona University
Demonstrating Author: Bradley Schmitz


Algae are a highly heterogeneous group of microorganisms that have one common trait, namely the possession of photosynthetic pigments. In the environment, algae can cause problems for swimming pool owners by growing …

 Environmental Microbiology

Gram Staining of Bacteria from Environmental Sources

JoVE 10092

Source: Laboratories of Dr. Ian Pepper and Dr. Charles Gerba - Arizona University
Demonstrating Author: Luisa Ikner


The spectrum of research in environmental microbiology is broad in scope and application potential. Whether the work is bench-scale with known bacterial isolates, or in the field collecting soil or water samples…

 Environmental Microbiology

Introduction to Titration

JoVE 5699

Source: Laboratory of Dr. Yee Nee Tan — Agency for Science, Technology, and Research


Titration is a common technique used to quantitatively determine the unknown concentration of an identified analyte.1-4 It is also called volumetric analysis, as the measurement of volumes is critical in titration. There are many types of titrations…

 General Chemistry

Determining the Solubility Rules of Ionic Compounds

JoVE 10197

Source: Laboratory of Dr. Neal Abrams — SUNY College of Environmental Science and Forestry


An ionic compound's solubility can be determined via qualitative analysis. Qualitative analysis is a branch of analytical chemistry that uses chemical properties and reactions to identify the cation or anion present in a chemical compound.…

 General Chemistry

VirWaTest, A Point-of-Use Method for the Detection of Viruses in Water Samples

1Laboratory of Viruses Contaminants of Water and Food (VIRCONT), Department of Genetics, Microbiology and Statistics, Section of Microbiology, Virology and Biotechnology, University of Barcelona, 2Grupo de Investigación Biodiversidad, Medio Ambiente y Salud (BIOMAS), Facultad de Ingenierías y Ciencias Agropecuarias (FICA), Ingeniería en Biotecnología, Universidad de las Américas, 3Municipal Laboratory - Waters of Mataró, 4GenIUL

JoVE 59463

 Immunology and Infection

Removal of Trace Elements by Cupric Oxide Nanoparticles from Uranium In Situ Recovery Bleed Water and Its Effect on Cell Viability

1Division of Physical Therapy, Department of Orthopedics & Rehabilitation, University of New Mexico, 2Department of Ecosystem Science and Management, University of Wyoming, 3School of Pharmacy, University of Wyoming, 4Department of Environmental and Radiological Health Sciences, Colorado State University, 5Center for Environmental Medicine, Colorado State University, 6College of Pharmacy, California Northstate University

JoVE 52715

 Environment

Spatial Multiobjective Optimization of Agricultural Conservation Practices using a SWAT Model and an Evolutionary Algorithm

1School of Environmental and Forest Sciences, University of Washington, 2Center for Agricultural and Rural Development, Department of Economics, Iowa State University, 3Department of Civil, Architectural, and Environmental Engineering, North Carolina A&T University, 4Iowa Geological and Water Survey

JoVE 4009

 Biology

A Modified EPA Method 1623 that Uses Tangential Flow Hollow-fiber Ultrafiltration and Heat Dissociation Steps to Detect Waterborne Cryptosporidium and Giardia spp.

1National Exposure Research Laboratory, Office of Research and Development, US Environmental Protection Agency, 2Shaw Environmental & Infrastructure, 3Office of Ground Water and Drinking Water, US Environmental Protection Agency

JoVE 4177

 Immunology and Infection

Bioindication Testing of Stream Environment Suitability for Young Freshwater Pearl Mussels Using In Situ Exposure Methods

1Faculty of Environmental Sciences, Czech University of Life Sciences Prague, 2T. G. Masaryk Water Research Institute, 3Department of Zoology and Fisheries, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague

JoVE 57446

 Environment

Semiconductor Sequencing for Preimplantation Genetic Testing for Aneuploidy

1Department of Genetics and Metabolism, Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region, 2Birth Defects Prevention and Control Institute of Guangxi Zhuang Autonomous Region, 3Shenzhen Research Institute, The Chinese University of Hong Kong, 4Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, 5State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic and Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, 6Basecare Medical Device Co., Ltd

JoVE 59273

 Genetics

Functional Evaluation of Olfactory Pathways in Living Xenopus Tadpoles

1Laboratory of Neurobiology, Neuroscience Program, Bellvitge Biomedical Research Institute (IDIBELL), L'Hospitalet de Llobregat, 2Department of Pathology and Experimental Therapy, School of Medicine, University of Barcelona, L'Hospitalet de Llobregat, 3Institute of Neurosciences, University of Barcelona, L'Hospitalet de Llobregat

JoVE 58028

 Neuroscience

Live Cell Analysis of Shear Stress on Pseudomonas aeruginosa Using an Automated Higher-Throughput Microfluidic System

1Department of Chemistry, Doane University, 2Department of Biology, Doane University, 3Department of Pathology and Microbiology, University of Nebraska Medical Center, 4Department of Physics and Engineering, Doane University

JoVE 58926

 Bioengineering

Microinjection of CRISPR/Cas9 Protein into Channel Catfish, Ictalurus punctatus, Embryos for Gene Editing

1School of Fisheries, Aquaculture and Aquatic Sciences, Auburn University, 2Department of Animal Wealth Development, Faculty of Veterinary Medicine, Suez Canal University, 3Anatomy and Embryology Department, Faculty of Veterinary Medicine, Cairo University, 4Department of Molecular Physiology and Biophysics, Vanderbilt University, 5Life Science Institute, University of Michigan

JoVE 56275

 Genetics

Prospecting Microbial Strains for Bioremediation and Probiotics Development for Metaorganism Research and Preservation

1LEMM, Laboratory of Molecular Microbial Ecology, Institute of Microbiology Paulo de Góes, Federal University of Rio de Janeiro (UFRJ), 2Genome Center, University of California, Davis, 3IMAM-AquaRio - Rio de Janeiro Aquarium Research Center

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JoVE 60238

 JoVE In-Press
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