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Glomerular Filtration Rate: The volume of water filtered out of plasma through glomerular capillary walls into Bowman's capsules per unit of time. It is considered to be equivalent to Inulin clearance.

Blood Withdrawal I

JoVE 10246

Source: Kay Stewart, RVT, RLATG, CMAR; Valerie A. Schroeder, RVT, RLATG. University of Notre Dame, IN

Blood collection is a common requirement for research studies that involve mice and rats. The method of blood withdrawal in mice and rats is dependent upon the volume of blood needed, the frequency of the sampling, the health status of the animal to be bled, and the skill level of the technician.1 All methods discussed-retro-orbital sinus bleeds, initial tail snip bleeds, and intracardiac bleeds-require the use of a general anesthesia.


 Essentials of Lab Animal Research

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Recording Temperature-induced Neuronal Activity through Monitoring Calcium Changes in the Olfactory Bulb of Xenopus laevis

1Institute of Neurophysiology and Cellular Biophysics, Georg-August-Universität Göttingen, 2Center for Nanoscale Microscopy and Molecular Physiology of the Brain, Georg-August-Universität Göttingen, 3DFG Excellence Cluster 171, Georg-August-Universität Göttingen, 4German Hearing Center Hannover

JoVE 54108


 Neuroscience

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Establishment of Cancer Stem Cell Cultures from Human Conventional Osteosarcoma

1Department of Surgery and Translational Medicine (DCMT), University of Florence, 2Neurofarba Department, University of Florence, 3Department of Traumatology and General Orthopedics, Azienda Ospedaliera Universitaria Careggi

JoVE 53884


 Cancer Research

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Use of a Filter Cartridge for Filtration of Water Samples and Extraction of Environmental DNA

1Department of Ecology and Environmental Sciences, Natural History Museum and Institute, Chiba, 2Graduate School of Human Development and Environment, Kobe University, 3Faculty of Science and Technology, Ryukoku University, 4Okinawa Churashima Research Center, 5Graduate School of Simulation Studies, University of Hyogo

JoVE 54741


 Environment

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Stable and Efficient Genetic Modification of Cells in the Adult Mouse V-SVZ for the Analysis of Neural Stem Cell Autonomous and Non-autonomous Effects

1Cell Division and Cancer Group, Spanish National Cancer Research Centre (CNIO), 2Centro de Investigaciones Biomédicas en Red sobre Enfermedades Neurodegenerativas (CIBERNED), 3Departmento de Biologìa Celular, Universidad de Valencia, 4Institut de Biomedicina de la Universitat de Barcelona (IBUB), 5Department of Molecular and Translational Medicine, Fibroblast Reprogramming Unit, University of Brescia

JoVE 53282


 Developmental Biology

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High-definition Fourier Transform Infrared (FT-IR) Spectroscopic Imaging of Human Tissue Sections towards Improving Pathology

1Department of Bioengineering, University of Illinois at Chicago, 2Department of Pathology, University of Illinois at Chicago, 3Department of Biological Sciences, University of Illinois at Chicago, 4Department of Chemistry, University of Illinois at Chicago, 5Department of Nephrology, University of Illinois at Chicago

JoVE 52332


 Medicine

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Separation of Mixtures via Precipitation

JoVE 5558

Source: Laboratory of Dr. Ana J. García-Sáez — University of Tübingen

Most samples of interest are mixtures of many different components. Sample preparation, a key step in the analytical process, removes interferences that may affect the analysis. As such, developing separation techniques is an important endeavor not just in academia, but also in industry.  One way to separate mixtures is to use their solubility properties. In this short paper, we will deal with aqueous solutions. The solubility of a compound of interest depends on (1) ionic strength of solution, (2) pH, and (3) temperature. By manipulating with these three factors, a condition in which the compound is insoluble can be used to remove the compound of interest from the rest of the sample.1


 Essentials of Organic Chemistry

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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

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Mammalian Cell Encapsulation in Alginate Beads Using a Simple Stirred Vessel

1Department of Chemical Engineering, McGill University, 2Michael Smith Laboratories & Department of Chemical and Biological Engineering, University of British Columbia, 3Michael Smith Laboratories & Department of Pharmaceutical Sciences, University of British Columbia

JoVE 55280


 Bioengineering

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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 include parasites, bacteria, and viruses that are shed in high numbers in the feces of infected people and animals. Transmission to new and susceptible hosts may then occur via the fecal-oral route upon ingestion of contaminated water. Therefore, the ability to monitor water sources for the presence of pathogenic microorganisms is significant in order to ensure public health. Due to the sheer number and variety of potential fecal-oral pathogens that may be present in water and their variable concentrations, it is impractical and expensive to assay directly for each one of them on a regular basis. Therefore, the microbiological assays for water quality monitoring employ coliform indicator bacteria. Coliforms comprise, in part, the normal intestinal microflora of warm-blooded mammals, are non-pathogenic, and are consistently excreted in the feces. Therefore, the detection of coliform bacteria in water means that a fecal release occurred, and that harmful pathogenic m


 Essentials of Environmental Microbiology

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