Related Experiment Video
Updated: Aug 15, 2026

26:43
Computer-Generated Animal Model Stimuli
Published on: July 29, 2007
[Rendering of animal material in the Netherlands (author's transl)]
Summary
Animal material rendering is mandatory and regulated, ensuring safety through strict government supervision and extensive bacteriological controls. Continuous improvements in hygiene have led to the successful elimination of Salmonella in end products.
Area of Science:
- Veterinary Public Health
- Food Safety
- Industrial Microbiology
Context:
- Historical regulation of animal material rendering since pre-World War II.
- Establishment of a mandatory rendering system in 1957 for processing animal by-products.
- Current operation of four rendering plants under strict government supervision and licensing.
Purpose:
- To outline the regulatory framework and operational procedures for animal material rendering.
- To detail the quality control measures, including bacteriological testing and thermochart monitoring.
- To highlight the improvements in hygienic conditions and product safety over time.
Summary:
- Mandatory rendering of animal origin materials is enforced by law, utilizing dry rendering systems.
- Government supervision by the Veterinary Public Health Inspectorate ensures compliance.
- Regular bacteriological testing for indicator organisms like Clostridium perfringens and Salmonella has significantly improved hygiene, with recent Salmonella absence in end products.
Impact:
- Demonstrates a successful public health intervention in managing animal by-products.
- Highlights the effectiveness of stringent controls in achieving safe, hygienic rendering processes.
- Establishes a precedent for continuous improvement in food and animal material processing safety.
Related Concept Videos
Tonicity in Animals
The tonicity of a solution determines if a cell gains or loses water in that solution. The tonicity depends on the permeability of the cell membrane for different solutes and the concentration of nonpenetrating solutes in the solution within and outside of the cell. If a semipermeable membrane hinders the passage of some solutes but allows water to follow its concentration gradient, water moves from the side with low osmolarity (i.e., less solute) to the side with higher osmolarity (i.e.,...
Translation
Lesson: Translation
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of Life
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of Life
The Retina
The retina is a layer of nervous tissue at the back of the eye that transduces light into neural signals. This process, called phototransduction, is carried out by rod and cone photoreceptor cells in the back of the retina.
Migration
Migration is long-range, seasonal movement from one region or habitat to another. This common strategy, carried out by many different organisms around the world, is an adaptive response that typically corresponds to changes in an organism’s environment, like resource availability or climate. Migrations can involve huge groups of thousands of animals as well as single individuals traveling alone and can range from thousands of kilometers to just a few hundred meters.
Parental Care
Many animals exhibit parental care behavior, including feeding, grooming, and protecting young offspring. Parental care is universal in mammals and birds, which often have young that are born relatively helpless. Several species of insects and fish, as well as some amphibians, also care for their young.

