Refine your search:

Containing Text
- - -
+
Filter by author or institution
GO
Filter by publication date
From:
October, 2006
Until:
Today
Filter by section
 
 
Food, Genetically Modified: Food derived from genetically modified organisms (Organisms, Genetically modified).
 Science Education: Essentials of Environmental Science

Testing For Genetically Modified Foods

JoVE Science Education

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

Genetic modification of foods has been a controversial issue due to debated concerns over health and environmental safety. This experiment demonstrates technical understanding of how food DNA is genetically identified, allowing for educated decision making about the safety and potential dangers of using genetically modified organisms (GMOs) in food supplies. Polymerase Chain Reaction (PCR) is used to amplify food DNA to test for the presence of genetically modified DNA in food products. Presence of specific DNA bands is detected by using gel electrophoresis to pull extracted food DNA through a 3% agarose gel, a concentration dense enough to separate the bands of DNA containing the genetically modified DNA. Several controls are used in the electrophoresis procedure to ensure DNA is successfully extracted from test foods (plant primer), and to provide known examples of both genetically modified DNA (purchased genetically modified DNA) and non-genetically modified DNA (purchased certified non-GMO food control).

 Science Education: Essentials of Lab Animal Research

Fundamentals of Breeding and Weaning

JoVE Science Education

Source: Kay Stewart, RVT, RLATG, CMAR; Valerie A. Schroeder, RVT, RLATG. University of Notre Dame, IN

Millions of mice and rats are bred for use in biomedical research each year. Worldwide, there are several large commercial breeding facilities that supply mice to research laboratories, but many facilities choose to also breed mice and rats in-house to reduce costs and increase research options. When breeding in the animal facility, researchers are able to manipulate the genetics of the animals, time the pregnancies to meet the needs of the research, and work with embryos and neonates as required. Mice and rats can be bred in a variety of schemes and methods. Technical procedures, such as the use of vaginal cytology, visualization of the vaginal area, and observation of copulatory plugs, have been developed to assist with the synchronization of breeding to correspond to research requirements. This manuscript is an overview of the basic fundamentals of mouse and rat breeding and technical procedures used. More detailed descriptions of the complex breeding schemes, and the full description of the methods for vaginal cytology, are available in the list of references.

 JoVE Environment

Mass Production of Genetically Modified Aedes aegypti for Field Releases in Brazil

1Oxitec Ltd, 2Departamento de Parasitologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, 3Departamento de Epidemiologia, Universidade de São Paulo, 4Moscamed Brasil, 5Deptartment of Zoology, University of Oxford, 6Instituto Nacional de Ciência e Tecnologia em Entomologia Molecular (INCT-EM)


JoVE 3579

 JoVE Medicine

Adapting Human Videofluoroscopic Swallow Study Methods to Detect and Characterize Dysphagia in Murine Disease Models

1Department of Otolaryngology - Head and Neck Surgery, University of Missouri, 2Department of Communication Science and Disorders, University of Missouri, 3Department of Medicine, University of Missouri


JoVE 52319

 Science Education: Essentials of Lab Animal Research

Basic Care Procedures

JoVE Science Education

Source: Kay Stewart, RVT, RLATG, CMAR; Valerie A. Schroeder, RVT, RLATG. University of Notre Dame, IN

Mice and rats account for over 90% of the animals used for biomedical research. The proper care of these research animals is critical to the outcome of experiments. There are general procedures that apply to the majority of these mice and rats, but some of the animals, such as the immunocompromised ones, require additional steps to be taken to sustain them for experimentation. Commonly used immunocompromised mice include those that have naturally occurred in inbred mice and those that have been created through genetic engineering. The first immunocompromised mice used in research were "nude" mice. The BALB/c Nude (nu) mouse was discovered in 1966, within a BALB/c colony that was producing mice lacking both hair and a thymus. These athymic mice have an inhibited immune system that is devoid of T cells. The value of this animal was soon discovered for the use in studies of microbial infections, immune deficiencies, and autoimmunity. Although not as commonly used as the nude mouse, there is also a nude rat. The nude rat is T cell deficient and shows depleted cell populations in thymus-dependent areas of peripheral lymphoid organs. Another naturally occurring immune deficient mouse is the severe comb

 JoVE Neuroscience

Low-stress Route Learning Using the Lashley III Maze in Mice

1Department of Chemistry, Pennsylvania State University, 2Center for Developmental and Health Genetics, Pennsylvania State University, 3Department of Veterinary and Biomedical Sciences, Pennsylvania State University, 4Huck Institute of the Life Sciences, Pennsylvania State University, 5California NanoSystems Institute, University of California, Los Angeles, 6Semel Institute of Neuroscience and Human Behavior, University of California, Los Angeles


JoVE 1786

 JoVE Bioengineering

Lignin Down-regulation of Zea mays via dsRNAi and Klason Lignin Analysis

1The School of Plant Sciences, University of Arizona, 2Department of Chemical Engineering and Materials Science, DOE Great Lakes Bioenergy Research Center, Michigan State University, 3The Institute for Sustainable and Renewable Resources, The Institute for Advanced Learning and Research, 4Department of Plant, Soil and Microbial Sciences, Michigan State University


JoVE 51340

 JoVE Medicine

Intrastriatal Injection of Autologous Blood or Clostridial Collagenase as Murine Models of Intracerebral Hemorrhage

1Multidisciplinary Neuroprotection Laboratories, Department of Anesthesiology, Duke University, 2Department of Neurology, Duke University, 3Department of Radiology, Duke University, 4Department of Neurobiology, Duke University


JoVE 51439

12345678970
More Results...
Waiting
simple hit counter