Refine your search:

Containing Text
- - -
+
Filter by author or institution
GO
Filter by publication date
From:
October, 2006
Until:
Today
Filter by section
 
 
Litter Size: The number of offspring produced at one birth by a viviparous animal.
 JoVE Biology

A Hybrid DNA Extraction Method for the Qualitative and Quantitative Assessment of Bacterial Communities from Poultry Production Samples

1Egg Safety and Quality Research Unit, USDA-Agricultural Research Service, 2Poultry Microbiological Safety and Processing Research Unit, USDA-Agricultural Research Service, 3Department of Biochemistry and Biophysics, Oregon State University, 4College of Public Health, University of Georgia, 5Department of Biological Sciences, Center for Microbial Genetics and Genomics, Northern Arizona University


JoVE 52161

 JoVE Behavior

Recording Mouse Ultrasonic Vocalizations to Evaluate Social Communication

1Human Genetics and Cognitive Functions, University Paris Diderot, CNRS UMR 3571, Institut Pasteur, 2Neurophysiology and Behavior, University Pierre et Marie Curie Paris 6, CNRS UMR 7102, 3Bio Image Analysis, CNRS URA 2582, Institut Pasteur


JoVE 53871

 JoVE Neuroscience

Isolation of Cerebrospinal Fluid from Rodent Embryos for use with Dissected Cerebral Cortical Explants

1Department of Physical Medicine and Rehabilitation, VA Greater Los Angeles Healthcare System, 2Department of Pharmacology and Physiology, Institute for Neuroscience, The George Washington University School of Medicine and Health Sciences, 3Division of Genetics, Department of Medicine, Boston Children's Hospital, 4Howard Hughes Medical Institute, Boston Children's Hospital, 5Department of Pathology, Boston Children's Hospital, Harvard Medical School


JoVE 50333

 JoVE Medicine

A Novel Surgical Approach for Intratracheal Administration of Bioactive Agents in a Fetal Mouse Model

1Molecular Virology and Gene Therapy, KU Leuven, 2Department of Woman and Child, KU Leuven, 3Neurobiology and Gene Therapy, KU Leuven, 4Division of Nuclear Medicine, KU Leuven, 5Biomedical NMR Unit/ MoSAIC, KU Leuven


JoVE 4219

 JoVE Behavior

Moderate Prenatal Alcohol Exposure and Quantification of Social Behavior in Adult Rats

1Department of Psychology, University of New Mexico, 2Department of Neurosciences, University of New Mexico, 3Department of Psychiatry and Behavioral Sciences, University of New Mexico, 4Canadian Centre for Behavioural Neuroscience, University of Lethbridge


JoVE 52407

 JoVE Behavior

Morris Water Maze Test: Optimization for Mouse Strain and Testing Environment

1Department of Psychology, Behavioral Neuroscience, West Virginia University, 2Department of Physiology and Pharmacology, West Virginia University, 3Department of Neurology, N. Bud Grossman Center for Memory Research and Care, University of Minnesota, 4Department of Neuroscience, N. Bud Grossman Center for Memory Research and Care, University of Minnesota, 5GRECC, VA Medical Center, 6Center for Neuroscience, Center for Basic and Translational Stroke Research, West Virginia University


JoVE 52706

 Science Education: Essentials of Environmental Science

Carbon and Nitrogen Analysis of Environmental Samples

JoVE Science Education

Source: Laboratories of Margaret Workman and Kimberly Frye - Depaul University

Elemental Analysis is a method used to determine elemental composition of a material. In environmental samples such as soils, scientists are particularly interested in the amounts of two ecologically important elements, nitrogen and carbon. Elemental analysis by the flash combustion technique works by oxidizing the sample with a catalyst through combustion in a high-temperature chamber. The products of combustion are then reduced to N2 and CO2 and detected with a thermal conductivity detector. Unlike other methods for total nitrogen determination (Kjeldahl method) and total carbon determination (Walkley-Black, Heanes or Leco methods), the flash combustion technique does not use toxic chemicals and is therefore much safer to use. This video will demonstrate combustion-based elemental analysis using the Flash EA 1112 instrument from Thermo Fisher Scientific.

 JoVE Developmental Biology

Isolation and Cryopreservation of Neonatal Rat Cardiomyocytes

1Department of Molecular Biomedical Sciences and Center for Comparative Medicine and Translational Research, College of Veterinary Medicine, North Carolina State University, 2Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill, North Carolina State University, 3The Cyrus Tang Hematology Center, Soochow University


JoVE 52726

 Science Education: Essentials of Organic Chemistry

Preparing Anhydrous Reagents and Equipment

JoVE Science Education

Source: Laboratory of Dr. Dana Lashley - College of William and Mary
Demonstrated by: Timothy Beck and Lucas Arney

Many reactions in organic chemistry are moisture-sensitive and must be carried out under careful exclusion of water. In these cases the reagents have a high affinity to react with water from the atmosphere and if left exposed the desired reaction will not take place or give poor yields, because the reactants are chemically altered. In order to prevent undesired reactions with H2O these reactions have to be carried out under an inert atmosphere. An inert atmosphere is generated by running the reaction under nitrogen gas, or in more sensitive cases, under a noble gas such as argon. Every component in such a reaction must be completely anhydrous, or free of water. This includes all reagents and solvents used as well as all glassware and equipment that will come into contact with the reagents. Extremely water-sensitive reactions must be carried out inside of a glovebox which provides a completely sealed off anhydrous environment to work under via a pair of gloves which protrudes out to one of the sides of the chamber.

12345678971
More Results...
Waiting
simple hit counter