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Showing 468 results
This Catalyst article looks at how exercise affects our immunity and susceptibility to infection. Recent research indicates that a person's level of physical activity affects their immune function, influencing their risk of respiratory tract infections such as a cold. Whereas moderate levels of regular exercise...
Chemists analyse the tiny traces of substances which form a fingerprint. This allows them to determine drug abuse and as well as the age, gender and diet of an individual.
This article is from Catalyst: Secondary Science Review 2016, Volume 26, Issue 3.
...This Catalyst article looks at fireworks and their history, how they are made and set off, and what gives them their colours and effects. The basic chemistry used in fireworks is looked at and how they work once the fuse is ignited.
This article is from Catalyst: GCSE Science Review 2002, Volume 13, Issue 2...
A Catalyst article about the Wright brothers who made the first powered flight. Unlike the try-it-and-see methods used in many of the previous attempts, the Wrights approached the problem of flight in a scientific way and beat the competition. This article looks at the Wright brothers' research and the wing shapes...
This Catalyst article describes how fish can help scientists to learn more about human biology. Understanding how human bodies work and what causes human disease is the key to future medical breakthroughs. Most discoveries in medical science are a result of experiments that cannot be performed on humans. Animal...
This Catalyst article explores 'Biomodels', biological species which are increasingly well-understood and which have been chosen because they can help us to test new biological theories, particularly in the field of genetics.
This article is from Catalyst: Secondary Science Review 2011, Volume 22, Issue 2....
This Catalyst article looks at the use of fluoride in water supplies. The UK health secretary has announced that more water companies would be encouraged to add fluoride to the water supplies. The article looks at why fluoride is added, what the advantages and risks are and why should it be put into water.
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This Catalyst article explores how high-speed photography can reveal how mosquitoes can keep dry while flying in the rain.
To find out how mosquitoes survive impacts with raindrops, a group of engineers from Georgia Institute of Technology (USA) developed a system which allowed them to photograph collisions...
This Catalyst article looks at what it means to say that an astronaut is 'weightless'. The article looks at how astronauts are trained in aircraft and how underwater work can also help prepare them for space travel.
This article is from Catalyst: Secondary Science Review 2008, Volume 19, Issue 1.
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What do dental fillings, catalytic converters, mobile phones and jewellery have in common? They all make use of the metal palladium. This Catalyst article explains the properties of this metal, and how it can be used for a vast array of objects.
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A Catalyst article about careers in the food industry. The food and drink industries are part of a chain linking farming and growing through to food processing, manufacture and finally to the sale of food in supermarkets and restaurants. This article describes some of the many career areas in food technology...
This Catalyst article describes how food waste can be treated by anaerobic digestion to produce methane and fertiliser.
This article is from Catalyst: Secondary Science Review 2011,...
A Catalyst article about food chains and food webs. The article studies evidence for global climate change and considers possible causes. It also explores how climate change might affect the food web, with evidence from a long-term study which started in 1931.
This article is from Catalyst: GCSE Science...
A Catalyst article about food additives. Some additives are natural and some are manufactured by the chemical industry. Some, like vitamin C, can come from either natural or artificial sources. As with every other component of food all additives are chemicals. Even organic food can contain a certain number of...
A Catalyst article looking at how insects are used to provide clues at crime scenes. Forensic entomology is the study of insects and other arthropods in a legal context. It covers many different areas, such as pests in stored food products and insect infestations in human habitations. However, the most high-profile...