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Negative Staining: The technique of washing tissue specimens with a concentrated solution of a heavy metal salt and letting it dry. The specimen will be covered with a very thin layer of the metal salt, being excluded in areas where an adsorbed macromolecule is present. The macromolecules allow electrons from the beam of an electron microscope to pass much more readily than the heavy metal; thus, a reversed or negative image of the molecule is created.

Utilization of Capsules for Negative Staining of Viral Samples within Biocontainment

1Pathology Division, United States Army Medical Research Institute of Infectious Diseases (USAMRIID), 2Diagnostic Systems Division, United States Army Medical Research Institute of Infectious Diseases (USAMRIID), 3Microscopy Innovations LLC

JoVE 56122


 Immunology and Infection

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

A Standardized Approach for Multispecies Purification of Mammalian Male Germ Cells by Mechanical Tissue Dissociation and Flow Cytometry

1Department of Genetics, Washington University School of Medicine, 2Graduate Program in Areas of Basic and Applied Biology (GABBA), Abel Salazar Institute of Biomedical Sciences, University of Porto, 3Instituto de Investigação e Inovação em Saúde, University of Porto, 4IPATIMUP - Instituto de Patologia e Imunologia Molecular da Universidade do Porto, 5Department of Pathology & Immunology, Washington University School of Medicine

JoVE 55913


 Developmental Biology

The Use of Induced Somatic Sector Analysis (ISSA) for Studying Genes and Promoters Involved in Wood Formation and Secondary Stem Development

1School of Ecosystem and Forest Sciences, Faculty of Science, The University of Melbourne, 2Victorian AgriBiosciences Centre, La Trobe University R&D Park, 3College of Biological Sciences, Department of Plant Biology, University of California, Davis, 4Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria

JoVE 54553


 Genetics

The C. elegans Intestine As a Model for Intercellular Lumen Morphogenesis and In Vivo Polarized Membrane Biogenesis at the Single-cell Level: Labeling by Antibody Staining, RNAi Loss-of-function Analysis and Imaging

1Mucosal Immunology and Biology Research Center, Developmental Biology and Genetics Core, Massachusetts General Hospital, Harvard Medical School, 2College of Life Sciences, Jilin University, 3Faculty of Health Sciences, University of Macau

JoVE 56100


 Developmental Biology

Multiplexed Immunofluorescence Analysis and Quantification of Intratumoral PD-1+ Tim-3+ CD8+ T Cells

1INSERM U970, Université Paris Descartes, 2Equipe Labellisée Ligue Contre le Cancer, 3Department of Immunology, Hopital Européen Georges Pompidou, 4Department of Medical Urology, Hopital Européen Georges Pompidou, 5Department of Pathology, Hopital Européen Georges Pompidou, 6Université Paris Diderot Paris 7, 7Department of medical oncology, Hopital Européen Georges Pompidou

Video Coming Soon

JoVE 56606


 JoVE In-Press

High Efficiency Differentiation of Human Pluripotent Stem Cells to Cardiomyocytes and Characterization by Flow Cytometry

1Department of Biochemistry, Medical College of Wisconsin, 2Stanford Cardiovascular Institute, Stanford University School of Medicine, 3Department of Anesthesiology, Medical College of Wisconsin, 4Stem Cell and Regenerative Medicine Consortium, LKS Faculty of Medicine, Hong Kong University, 5Division of Cardiology, Johns Hopkins University School of Medicine, 6Cardiovascular Research Center, Biotechnology and Bioengineering Center, Medical College of Wisconsin

JoVE 52010


 Biology

Building Up a High-throughput Screening Platform to Assess the Heterogeneity of HER2 Gene Amplification in Breast Cancers

1Division of Pathology, Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, 2School of Medicine, University of Milan, 3School of Biology, University of Pavia, 4Division of Breast Surgery, Fondazione IRCCS Ca' Granda - Ospedale Maggiore Policlinico, 5Division of Medical Oncology, Fondazione IRCCS Ca' Granda - Ospedale Maggiore Policlinico, 6Department of Biomedical, Surgical, and Dental Sciences, University of Milan

Video Coming Soon

JoVE 56686


 JoVE In-Press

Genome-Wide RNAi Screening to Identify Host Factors That Modulate Oncolytic Virus Therapy

1Children's Hospital of Eastern Ontario (CHEO) Research Institute, 2Department of Biology, Microbiology and Immunology, University of Ottawa, 3Department of Pediatrics, University of Ottawa, 4Department of Microbiology, Immunology and Infectious Diseases, Cumming School of Medicine, University of Calgary

Video Coming Soon

JoVE 56913


 JoVE In-Press

Primer for Immunohistochemistry on Cryosectioned Rat Brain Tissue: Example Staining for Microglia and Neurons

1Department of Child Health, University of Arizona College of Medicine - Phoenix, 2BARROW Neurological Institute, Phoenix Children's Hospital, 3Department of Biology and Biochemistry, University of Bath, 4Neuroscience Program, Arizona State University, 5Phoenix VA Healthcare System

JoVE 52293


 Neuroscience

The Neuromuscular Junction: Measuring Synapse Size, Fragmentation and Changes in Synaptic Protein Density Using Confocal Fluorescence Microscopy

1Physiology and Bosch Institute, University of Sydney, 2Motor Neuron Disease Research Group, Australian School of Advanced Medicine, Macquarie University, 3Advanced Microscopy Facility, Bosch Institute, University of Sydney

JoVE 52220


 Neuroscience

Flow Cytometry Protocols for Surface and Intracellular Antigen Analyses of Neural Cell Types

1Emmy Noether-Group for Stem Cell Biology, Department of Molecular Embryology, Institute of Anatomy and Cell Biology, University of Freiburg, 2Spemann Graduate School of Biology and Medicine and Faculty of Biology, University of Freiburg, 3School of Life Sciences, Keele University, 4Center for Biological Signaling Studies (BIOSS), University of Freiburg

JoVE 52241


 Neuroscience

Quantitation of Protein Expression and Co-localization Using Multiplexed Immuno-histochemical Staining and Multispectral Imaging

1Division of Urologic Surgery, Washington University in St. Louis School of Medicine, 2Department of Urology, University of Wisconsin School of Medicine and Public Health, 3Department of Pathology and Laboratory Medicine, University of Wisconsin School of Medicine and Public Health, 4O’Brien Urology Research Center, University of Wisconsin School of Medicine and Public Health

JoVE 53837


 Biology

Adaptation of Semiautomated Circulating Tumor Cell (CTC) Assays for Clinical and Preclinical Research Applications

1London Regional Cancer Program, London Health Sciences Centre, 2Department of Anatomy & Cell Biology, Schulich School of Medicine and Dentistry, Western University, 3Special Hematology/Flow Cytometry, London Health Sciences Centre, 4Lawson Health Research Institute, 5Department of Oncology, Western University

JoVE 51248


 Medicine

Analysis of Cell Suspensions Isolated from Solid Tissues by Spectral Flow Cytometry

1Flow Cytometry Core Facility, Center for Translational Research-Technical Core, Institut Pasteur, 2Unit for Lymphopoiesis, Immunology Department, INSERM U1223, University Paris Diderot, Sorbonne Paris Cité, Cellule Pasteur, Institut Pasteur, 3Stem-Cell Microenvironments in Repair/Regeneration Team, Instituto de Investigação e Inovação em Saúde (i3s), INEB - Instituto de Engenharia Biomédica, 4ICBAS - Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, 5Stem Cells and Regenerative Medicine Team, UMRS 1166, ICAN - Institute of Cardiometabolism And Nutrition, UPMC - Université Pierre et Marie Curie - Paris 6, INSERM

JoVE 55578


 Biology

Flow Cytometry-based Assay for the Monitoring of NK Cell Functions

1Childrens Hospital, Department of Pediatric Stem Cell Transplantation and Immunology, Johann Wolfgang Goethe-University, 2LOEWE Center for Cell and Gene Therapy, Johann Wolfgang Goethe-University, 3Institute for Cancer Research, Department of Cancer Immunology, Oslo University Hospital, Radiumhospital, 4The KG Jebsen Center for Cancer Immunotherapy, Institute of Clinical Medicine, University of Oslo

JoVE 54615


 Immunology and Infection

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