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Lipids17 August 2022

Are saturated fats bad for your heath?There is real scope for both Nature of Science and Theory of Knowledge in discussing the question, ‘Are saturated fats bad for you?’ For the past forty years... more

Proteins & enzymes 17 August 2022

This topic requires students to understand the primary, secondary, tertiary and quaternary structures of proteins. They can easily understand how the primary structure is obtained by hydrolysing the protein... more

Introduction to biochemistry 17 August 2022

The section on International-Mindedness for this introductory sub-topic stresses “the differences in the availability of nutritious food, which have major and diverse impacts on human health”. In... more

Environmental impact - heavy metals17 August 2022

Your students will need will to take some care when using solubility products.Consider the following values (at 298 K) which are obtained from the table given in Section 32 of the data book[1]. more

Superconducting metals & X-ray crystallography 17 August 2022

In JIB Docs (2) Teamary 2017 yet another revised version of the data booklet became available. However there is still a real problem with the atomic radii given for the elements in Groups 1, 2 and 13.The images below... more

Environmental impact - plastics17 August 2022

Three highly relevant items for ‘Pause for thought’ have already been included elsewhere. The harmful effects of low molecular mass phthalate esters are discussed in A.5 Polymers, the effects of PCBs... more

Nanotechnology17 August 2022

You might be forgiven for thinking that this sub-topic is more concerned with physics rather than chemistry. This is supported by the fact that Andre Geim and Konstantin Novoselov, both from the University... more

Polymers 17 August 2022

The syllabus for this sub-topic covers the use of plasticizers to make PVC flexible but it does not actually cover what they are. Probably the most commonly used plasticizers are the phthalates which... more

Liquid crystals17 August 2022

The Nature of Science section for this sub-topic uses Reinitzer’s discovery of liquid crystals as an example of serendipity. In 1888 Reinitzer synthesised a new compound - cholesteryl benzoate. more

Catalysts 17 August 2022

It is fairly easy to see how a heterogeneous catalyst works. Two reacting gases, e.g. hydrogen and ethene, adsorb onto the surface of a transition metal such as nickel or palladium. This brings the two... more