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Water analysis case
Determine the water quality of a pond together with your students.
With this case you can determine the water quality quite accurately. In addition to the temperature, you investigate ten chemical parameters:- acidity,
- total hardness,
- oxygen …
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Electricity: safety, cabling, alternating and direct voltage
Step-by-step explanation of electricity with attention to safety, cabling, direct and alternating voltage.
- Electricity is an important part of a refrigeration technician's job and does not come without its share of dangers. That is why it is …
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Refrigeration, a job with a future
This video is part of a project of the Spectrum School and Frixis. The project came about with the support of the Flemish education program InnoVET, which supports the development of innovative learning methods and teaching materials in …
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VideoOrganisation, company, NPO -
Correct installation of a cooling installation
Step-by-step explanation of installing a cooling installation with attention to components, mounting material, safety and maintenance.
For the correct installation of a cooling installation, we first choose the correct installation location. Choosing …
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Different setups of a cooling installation
Step-by-step explanation of the set-up of a cooling installation with attention to the main components, the hazards and the risks.
There are four main components to a refrigeration plant: the compressor, the condenser, the expander, the evaporator. …
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Dismantling a cooling installation
Step-by-step explanation of dismantling a cooling installation with attention to safety, the environment and the sorting of materials.
If you are asked to disassemble an installation, it is important to carry out the correct step-by-step plan and to …
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The maintenance schedule of a cooling installation
Step-by-step explanation of the maintenance of a cooling installation with attention to the logbook, maintenance instructions and checks.
- The log should always be available near the installation. This can be in electronic form or on paper. This is …
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Brazing
Step-by-step explanation of brazing with attention to preparation, tool setting and safety.
- Before we start brazing, we start with the preparation. We prepare by deburring the tube on the inside. Deburring is the removal of irregularities and sharp …
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Synthesis of Gold Colloids: Demonstration
In the video, students demonstrate how they synthesized gold colloids during their research project using the Leidenfrost effect.
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Synthesis of Quantum Dots from Lemon Juice: Demonstration
During the research project on nanotechnology, third-year chemistry students Koen Truyens, Tom Walravens and Andy De Laet synthesized 'fluorescent carbon quantum dots' based on the article 'Safe One-Pot Synthesis of Fluorescent Carbon …
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NRC Hairless Monkeys: Science podcast
Hairless Monkeys is the weekly science podcast of NRC. Lucas Brouwers, Hendrik Spiering and Gemma Venhuizen discuss small discoveries, wild theories, earth-shattering insights and everything in between.
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Anti-smoking eduki
This kit contains three tests that show that the chemicals in cigarette butts are harmful to the environment (fresh water, salt water, soil).
- Experiment 1: test with a freshwater organism (rotifer);
- Experiment 2: test with a marine organism (brine …
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