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Sample Size: The number of units (persons, animals, patients, specified circumstances, etc.) in a population to be studied. The sample size should be big enough to have a high likelihood of detecting a true difference between two groups. (From Wassertheil-Smoller, Biostatistics and Epidemiology, 1990, p95)

Studying Soft-matter and Biological Systems over a Wide Length-scale from Nanometer and Micrometer Sizes at the Small-angle Neutron Diffractometer KWS-2

1Jülich Centre for Neutron Science Outstation at MLZ, Forschungszentrum Jülich GmbH, 2Department of Chemistry, Louisiana State University, 3Jülich Centre for Neutron Science JCNS-1 & Institute of Complex Systems ICS-1, Forschungszentrum Jülich GmbH, 4Central Institute of Engineering, Electronics and Analytics — Electronic Systems (ZEA-2), Forschungszentrum Jülich GmbH, 5Central Institute of Engineering, Electronics and Analytics — Engineering and Technology (ZEA-1), Forschungszentrum Jülich GmbH

JoVE 54639


 Bioengineering

Stress Distribution During Cold Compression of Rocks and Mineral Aggregates Using Synchrotron-based X-Ray Diffraction

1Mineral Physics Institute, Department of Geoscience, Stony Brook University, 2Geological Engineering, Department of Civil and Environmental Engineering, University of Wisconsin-Madison, 3Rock and Ice Physics Laboratory, Department of Earth Sciences, University College London, 4Department of Chemistry, Stony Brook University

JoVE 57555


 Environment

Identifying DNA Mutations in Purified Hematopoietic Stem/Progenitor Cells

1Greehey Children's Cancer Research Institute, UT Health Science Center at San Antonio, 2Department of Cellular and Structural Biology, UT Health Science Center at San Antonio, 3Department of Pathology, UT Health Science Center at San Antonio, 4Department of Microbiology, UT Health Science Center at San Antonio, 5Cancer Therapy and Research Center, UT Health Science Center at San Antonio

JoVE 50752


 Immunology and Infection

Quantitative Cell Biology of Neurodegeneration in Drosophila Through Unbiased Analysis of Fluorescently Tagged Proteins Using ImageJ

1Department of Molecular and Cellular Pharmacology, University of Miami Miller School of Medicine, 2School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation (Yantai University), Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University

JoVE 58041


 Neuroscience

Performing Permanent Distal Middle Cerebral with Common Carotid Artery Occlusion in Aged Rats to Study Cortical Ischemia with Sustained Disability

1Wolfson Centre for Age-Related Diseases, King's College London, University of London, 2Department of Neuroimaging, James Black Centre, Institute of Psychiatry, King's College London, University of London, 3Institute of Neuroscience and Psychology, Wellcome Surgical Institute, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, 4Research Service, Edward Hines Jr. VA Hospital, 5Neurology Service, Edward Hines Jr. VA Hospital, 6Department of Molecular Pharmacology and Therapeutics, Neuroscience Research Institute, Loyola University Chicago, 7Department of Oncology, The Gray Institute for Radiation, Oncology and Biology, University of Oxford

JoVE 53106


 Medicine

Methods of Soil Resampling to Monitor Changes in the Chemical Concentrations of Forest Soils

1New York Water Science Center, U.S. Geological Survey, 2School of Forest Resources, University of Maine, 3Natural Resources Canada, Canadian Forest Service, 4Northern Research Station, U.S. Forest Service, 5Department of Plant and Soil Science, University of Vermont, 6Ottauquechee NRCD, USDA Natural Resources Conservation Service, 7Green Mountain National Forest, U.S. Forest Service, 8Direction de la Recherche Forestière, Ministère du Québec, 9Department of Civil and Environmental Engineering, Syracuse University, 10Division of Environmental Science, SUNY College of Environmental Science and Forestry, 11White Mountain National Forest, U.S. Forest Service, 12Natural Resources and Earth System Sciences, University of New Hampshire, 13Greenwich, NY Field Office, USDA Natural Resources Conservation Service

JoVE 54815


 Environment

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

Making Record-efficiency SnS Solar Cells by Thermal Evaporation and Atomic Layer Deposition

1Department of Mechanical Engineering, Massachusetts Institute of Technology, 2Laboratory for Manufacturing and Productivity, Massachusetts Institute of Technology, 3School of Engineering and Applied Sciences, Harvard University, 4Department of Materials Science and Engineering, Massachusetts Institute of Technology, 5Department of Chemistry & Chemical Biology, Harvard University

JoVE 52705


 Engineering

Comparable Decellularization of Fetal and Adult Cardiac Tissue Explants as 3D-like Platforms for In Vitro Studies

1i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, 2INEB - Instituto de Engenharia Biomédica, Universidade do Porto, 3Instituto de Ciências Biomédicas Abel Salazar (ICBAS), Universidade do Porto, 4Gladstone Institute of Cardiovascular Disease, 5Faculty of Medicine, University of Porto, 6University of California San Francisco

JoVE 56924


 Bioengineering

Use of Micro X-ray Computed Tomography with Phosphotungstic Acid Preparation to Visualize Human Fibromuscular Tissue

1Department of Anatomy, Yonsei University College of Medicine, 2Department of Anesthesiology and Pain Medicine, Anesthesia and Pain Research Institute, Yonsei University College of Medicine, 3Surgical Anatomy Education Centre at the Yonsei University College of Medicine

Video Coming Soon

JoVE 59752


 JoVE In-Press

Sampling for Estimating Frankliniella Species Flower Thrips and Orius Species Predators in Field Experiments

1North Florida Research and Education Center, University of Florida, 2Animal and Plant Health Inspection Services, Plant Protection Quarantine, Miami Plant Inspection Station, United States Department of Agriculture, 3Agricultural Research Service, US Horticultural Research Laboratory, United States Department of Agriculture

Video Coming Soon

JoVE 59869


 JoVE In-Press

Data Collection on Marine Litter Ingestion in Sea Turtles and Thresholds for Good Environmental Status

1Italian National Institute for Environmental Protection and Research (ISPRA), 2Institute for Coastal Marine Environment-National Research Council (IAMC-CNR), 3EPHE, PSL Research University, UMR 5175 CE3FE, CNRS, UM, Univ P. Valery, SupAgro, IRD, INRA, Biogéographie et Écologie des Vertébrés, 4Cavanilles Institute of Biodiversity and Evolutionary Biology, University of Valencia, 5Departamento de Oceanografia e Pescas, Instituto do Mar/Okeanos, Universidade dos Açores, 6MARE - Marine and Environmental Sciences Centre, Universidade dos Açores, 7Muséum national d' Histoire naturelle (MNHN), 8Sea Turtle Research and Application Center (DEKAMER), Pamukkale University, 9Institute of Oceanografy Hellenic Centre for Marine Research (HCMR), 10Institut National des Sciences et Technologies de la Mer (INSTM), 11University of Las Palmas de Gran Canaria, 12INDICIT consortium

JoVE 59466


 Environment

Separation of Uranium and Thorium for 230Th-U Dating of Submarine Hydrothermal Sulfides

1Key Laboratory of Cenozoic Geology and Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, 2Institutions of Earth Science, Chinese Academy of Sciences, 3University of Chinese Academy of Sciences, 4First Institute of Oceanography, State Oceanic Administration, 5Key Laboratory of Submarine Geosciences, Second Institute of Oceanography, State Oceanic Administration

JoVE 59098


 Chemistry

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