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A Hyperandrogenic Mouse Model to Study Polycystic Ovary Syndrome

1Department of Pediatrics, Johns Hopkins University School of Medicine, 2Department of health, Beijing Military General Hospital, 3Southern Medical University, 4Deprtment of Molecular and Cellular Physiology, Johns Hopkins University School of Medicine, 5Department of Gynecology and Obstetrics, Johns Hopkins University School of Medicine

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JoVE 58379


 JoVE In-Press

A RANKL-based Osteoclast Culture Assay of Mouse Bone Marrow to Investigate the Role of mTORC1 in Osteoclast Formation

1Department of Pediatric Dentistry, Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, National Clinical Research Center of Stomatology, 2State Key Laboratory of Cell Biology, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, University of Chinese Academy of Sciences, 3Department of Oral and Maxillofacial-Head and Neck Oncology, Ninth People's Hospital, Shanghai Jiaotong University School of Medicine

JoVE 56468


 Developmental Biology

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 based on the types of reactions they exploit. The most common types are acid-base titrations and redox titrations.5-11 In a typical titration process, a standard solution of titrant in a burette is gradually applied to react with an analyte with an unknown concentration in an Erlenmeyer flask. For acid-base titration, a pH indicator is usually added in the analyte solution to indicate the endpoint of titration.12 Instead of adding pH indicators, pH can also be monitored using a pH meter during a titration process and the endpoint is determined graphically from a pH titration curve. The volume of titrant recorded at the endpoint can be used to calculate the concentration of the analyte based on the reaction stoichiometry. For the acid-base titration presented in this video, the titrant is a standardized sodium hydroxide solution and the analyte is domestic vinegar. Vinegar is an acidic liquid that


 General Chemistry

Phenotypic Characterization of Macrophages from Rat Kidney by Flow Cytometry

1Renal, Vascular and Diabetes Research Lab, IIS-Fundaciòn Jiménez Dìaz, Autonoma University, 2Department of Physiology, Faculty of Medicine, Complutense University, 3Department of Immunology, Centro Nacional de Microbiologìa, Instituto de Salud Carlos III (ISCIII)

JoVE 54599


 Immunology and Infection

Consensus Brain-derived Protein, Extraction Protocol for the Study of Human and Murine Brain Proteome Using Both 2D-DIGE and Mini 2DE Immunoblotting

1Team Alzheimer & Tauopathies, Jean-Pierre Aubert Research Centre, Inserm UMR 837, 2EA 4308-Department of Reproductive Biology-Spermiology-CECOS, CHRU-Lille, 3EA2686-Laboratorie d'Immunologie, Faculté de Médecine - Pôle Recherche, 4Department of Neurology, CHRU-Lille

JoVE 51339


 Neuroscience

Regenerative Therapy by Suprachoroidal Cell Autograft in Dry Age-related Macular Degeneration: Preliminary In Vivo Report

1Low Vision Research Centre of Milan, 2Department of Ophthalmology, A. Fiorini Hospital, Sapienza University of Rome, 3Glaucoma and Low Vision Study Center, Department of General Surgery and Organ Transplants, University of Bologna, 4Department of Sense Organs, Faculty of Medicine and Odontology, Sapienza University of Rome

JoVE 56469


 Medicine

Using Multi-fluorinated Bile Acids and In Vivo Magnetic Resonance Imaging to Measure Bile Acid Transport

1Department of Surgery, University of Maryland School of Medicine, 2Department of Medicine, University of Maryland School of Medicine, 3Department of Radiology, University of Maryland School of Medicine, 4Food and Drug Administration, 5Department of Pharmaceutical Sciences, University of Maryland School of Pharmacy, 6VA Maryland Health Care System

JoVE 54597


 Medicine

Electrophysiological Motor Unit Number Estimation (MUNE) Measuring Compound Muscle Action Potential (CMAP) in Mouse Hindlimb Muscles

1Department of Neurology, The Ohio State University Wexner Medical Center, 2Department of Physical Medicine and Rehabilitation, The Ohio State University, 3Department of Neuroscience, The Ohio State University Wexner Medical Center, 4Department of Biochemistry and Pharmacology, The Ohio State University Wexner Medical Center

JoVE 52899


 Behavior

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

New Application of an Atmospheric Pressure Plasma Jet as a Neuro-protective Agent Against Glucose Deprivation-induced Injury of SH-SY5Y Cells

1Department of Pathophysiology, Beijing Neurosurgical Institute/Beijing Tiantan Hospital, Capital Medical University, 2School of Physics, Beijing Institute of Technology, 3Beijing Key Laboratory of Central Nervous System Injury, Beijing Neurosurgical Institute, Beijing Tiantan Hospital, Capital Medical University, 4Beijing Key Laboratory of Translational Medicine for Cerebrovascular Disease, Beijing Tiantan Hospital, Capital Medical University, 5China National Clinical Research Center for Neurological Diseases, Beijing Tiantan Hospital, Capital Medical University

JoVE 56323


 Engineering

A Model of Cardiac Remodeling Through Constriction of the Abdominal Aorta in Rats

1Graduate Institute of Pharmacology, College of Medicine, National Taiwan University, 2Division of Pulmonary and Critical Care Medicine, Mackay Memorial Hospital, 3Mackay Medicine, Nursing and Management College, 4School of Medicine, National Taiwan University, 5Department of Internal Medicine, National Taiwan University Hosptial

JoVE 54818


 Medicine

Fetal Echocardiography and Pulsed-wave Doppler Ultrasound in a Rabbit Model of Intrauterine Growth Restriction

1Division Woman and Child, Department Women, University Hospitals Leuven, 2The Ritchie Centre, Monash Institute of Medical Research, Department of Obstetrics and Gynaecology, Monash University, Victoria, Australia, 3Department of Cardiovascular Sciences, Katholieke Universiteit Leuven, 4Fetal and Perinatal Medicine Research Group, Institut d'Investigacions Biomediques August Pi i Sunyer (IDIBAPS), 5Maternal-Fetal Medicine Department, ICGON, Hospital Clínic, Universitat de Barcelona, Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER)

JoVE 50392


 Medicine

A Method for Ovarian Follicle Encapsulation and Culture in a Proteolytically Degradable 3 Dimensional System

1Institute for BioNanotechnology in Advanced Medicine, Northwestern University, 2Department of Obstetrics and Gynecology, Northwestern University, Feinberg School of Medicine, 3Center for Reproductive Research, Northwestern University, 4The Robert H. Lurie Comprehensive Cancer Center, Northwestern University, 5Department of Chemical and Biological Engineering, Northwestern University

JoVE 2695


 Bioengineering

A Community-based Stress Management Program: Using Wearable Devices to Assess Whole Body Physiological Responses in Non-laboratory Settings

1Department of Emergency Medicine, The University of Texas Health Science Center, 2Department of Integrative Physiology, The University of North Texas Health Science Center, 3Works of Wonder International, 4DeVos Graduate Sports Business Management Program, University of Central Florida

JoVE 55816


 Behavior

Genome-wide Mapping of Drug-DNA Interactions in Cells with COSMIC (Crosslinking of Small Molecules to Isolate Chromatin)

1Department of Biochemistry, University of Wisconsin–Madison, 2Department of Electrical and Computer Engineering, University of Wisconsin–Madison, 3Graduate Program in Cellular and Molecular Biology, University of Wisconsin–Madison, 4The Genome Center, University of Wisconsin–Madison

JoVE 53510


 Biology

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