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Freeze Drying: Method of tissue preparation in which the tissue specimen is frozen and then dehydrated at low temperature in a high vacuum. This method is also used for dehydrating pharmaceutical and food products.
 Science Education: Essentials of Organic Chemistry

Schlenk Lines Transfer of Solvents

JoVE Science Education

Source: Hsin-Chun Chiu and Tyler J. Morin, laboratory of Dr. Ian Tonks—University of Minnesota Twin Cities

Schlenk lines and high vacuum lines are both used to exclude moisture and oxygen from reactions by running reactions under a slight overpressure of inert gas (usually N2 or Ar) or under vacuum. Vacuum transfer has been developed as a method separate solvents (other volatile reagents) from drying agents (or other nonvolatile agents) and dispense them to reaction or storage vessels while maintaining an air-free environment. Similar to thermal distillations, vacuum transfer separates solvents by vaporizing and condensing them in another receiving vessel; however, vacuum transfers utilize the low pressure in the manifolds of Schlenk and high vacuum lines to lower boiling points to room temperature or below, allowing for cryogenic distillations. This technique can provide a safer alternative to thermal distillation for the collection of air- and moisture-free solvents. After the vacuum transfer, the water content of the collected solvent can be tested quantitatively by Karl Fischer titration, qualitatively by titration with a Na/Ph2CO solution, or by 1H NMR spectroscopy.

 JoVE Medicine

Quantification of the Immunosuppressant Tacrolimus on Dried Blood Spots Using LC-MS/MS

1iC42 Clinical Research and Development, University of Colorado, Anschutz Medical Campus, 2Division of Clinical Pharmacology, Cincinnati Children's Hospital Medical Center, 3Food and Drug Administration (FDA), Center of Drug Evaluation Research - Office of Generic Drugs, 4Transplant Clinical Research, University of Cincinnati


JoVE 52424

 JoVE Environment

Extraction and Analysis of Microbial Phospholipid Fatty Acids in Soils

1Department of Renewable Resources, University of Alberta, 2Department of Science, Augustana Faculty, University of Alberta, 3Laboratoire Génie Civil et géo-Environnement, Université de Lille, 4Department of Earth and Environmental Sciences, Mount Royal University, 5Forest Ecology & Production, Great Lakes Forestry Centre, Natural Resources Canada


JoVE 54360

 JoVE Biology

Tissue Triage and Freezing for Models of Skeletal Muscle Disease

1Division of Pediatric Pathology, Department of Pathology and Laboratory Medicine, Medical College of Wisconsin, 2Department of Physiology and Cell Biology, The Ohio State University, 3Department of Human Nutrition, Foods and Exercise, Virginia Tech, 4Division of Biomedical Informatics, Department of Biostatistics, Department of Computer Science, University of Kentucky, 5Division of Genetics and Genomics, The Manton Center for Orphan Disease Research, Boston Children's Hospital, Harvard Medical School, 6Cure Congenital Muscular Dystrophy, 7Joshua Frase Foundation, 8Department of Rehabilitation Medicine, University of Washington, 9Department of Physiology, University of Arizona


JoVE 51586

 JoVE Bioengineering

Formulation of Diblock Polymeric Nanoparticles through Nanoprecipitation Technique

1Laboratory of Nano- and Translational Medicine, Department of Radiation Oncology, Lineberger Comprehensive Cancer Center, University of North Carolina School of Medicine, 2Carolina Center for Nanotechnology Excellence, University of North Carolina


JoVE 3398

 JoVE Biology

Purification of Transcripts and Metabolites from Drosophila Heads

1Department of Neurology, McKnight Brain Institute, University of Florida, 2Department of Entomology and Nematology, University of Florida, 3Genetics Institute, Department of Molecular Genetics and Microbiology, University of Florida, 4McKnight Brain Institute, Department of Neuroscience, Genetics Institute, Center for Translational Research on Neurodegenerative Diseases, and Center for Movement Disorders and Neurorestoration, University of Florida


JoVE 50245

 JoVE Biology

Reconstitution of a Transmembrane Protein, the Voltage-gated Ion Channel, KvAP, into Giant Unilamellar Vesicles for Microscopy and Patch Clamp Studies

1Institut Curie, Centre de Recherche, CNRS, UMR 168, PhysicoChimie Curie, Université Pierre et Marie Curie, 2Kavli Institute for Brain and Mind, University of California, San Diego, 3Molecular Physiology and Biophysics Section, National Institute for Neurological Disorders and Stroke, National Institute of Health


JoVE 52281

 JoVE Bioengineering

Synthesis of Thermogelling Poly(N-isopropylacrylamide)-graft-chondroitin Sulfate Composites with Alginate Microparticles for Tissue Engineering

1Department of Chemical Engineering, Rowan University, 2Department of Biological Sciences, Rowan University, 3Department of Biomedical Engineering, Drexel University


JoVE 53704

 JoVE Neuroscience

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

 JoVE Chemistry

Characterization, Quantification and Compound-specific Isotopic Analysis of Pyrogenic Carbon Using Benzene Polycarboxylic Acids (BPCA)

1Department of Geography, University of Zurich, 2Department of Earth and Ocean Sciences, University of South Carolina, 3Department of Earth Sciences, ETH Zurich, 4Laboratory of Ion Beam Physics, ETH Zurich, 5Department of Geological Sciences, Stockholm University


JoVE 53922

 JoVE Bioengineering

Cell Labeling and Targeting with Superparamagnetic Iron Oxide Nanoparticles

1Division of Cardiovascular Diseases, Mayo Clinic, 2Division of Engineering, Mayo Clinic, 3School of Medicine, Pharmacy and Health, Durham University, 4Regional Center for Applied Molecular Oncology, Masaryk Memorial Cancer Institute, 5Mayo Clinic College of Medicine, Mayo Clinic


JoVE 53099

 JoVE Biology

Reconstitution Of β-catenin Degradation In Xenopus Egg Extract

1Department of Cell and Developmental Biology and Program in Developmental Biology, Vanderbilt University Medical Center, 2Division of Gastroenterology, Hepatology & Nutrition and Division of Developmental Biology, Cincinnati Children's Hospital Medical Center, 3Vanderbilt Ingram Cancer Center, Vanderbilt University School of Medicine


JoVE 51425

 JoVE Bioengineering

Multi-Scale Modification of Metallic Implants With Pore Gradients, Polyelectrolytes and Their Indirect Monitoring In vivo

1Biomatériaux et Bioingénieriee, INSERM, 2Service Oto-Rhino-Laryngologie, Hôpitaux Universitaires de Strasbourg, 3Faculté de Chirurgie Dentaire, Université de Strasbourg


JoVE 50533

 Science Education: Essentials of General Chemistry

Using Differential Scanning Calorimetry to Measure Changes in Enthalpy

JoVE Science Education

Source: Laboratory of Dr. Terry Tritt — Clemson University

Differential Scanning Calorimetry (DSC) is a method of thermodynamic analysis based on heat-flux method, wherein a sample material (enclosed in a pan) and an empty reference pan are subjected to identical temperature conditions. The energy difference that is required to maintain both the pans at the same temperature, owing to the difference in the heat capacities of the sample and the reference pan, is recorded as a function of temperature. This energy released or absorbed is a measure of the enthalpy change (ΔΗ) of the sample with respect to the reference pan.

 JoVE Medicine

Isolation and Immortalization of Patient-derived Cell Lines from Muscle Biopsy for Disease Modeling

1Department of Cell Biology, UT Southwestern Medical Center, 2National Institute of Neurological Disorders and Stroke, National Institute of Health, 3Division of Pediatric Pathology, Department of Pathology and Laboratory Medicine, Medical College of Wisconsin, 4Division of Genetics and Genomics, Boston Children's Hospital


JoVE 52307

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