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...working in the USA and Britain. These first condensation products of the controlled reactions between phenol and formaldehyde produced hard but relatively weak and brittle materials. Swinburne commercialised his resin as a range of varnishes but Baekeland mixed the resin with significant amounts of woodflour to produce the first polymer composite – Bakelite . It was the...

...work in the Firefox and Chrome browsers, so you will need to use one of these browsers if you want to access the interactive content. This OpenLearn course is an adapted extract from the Open University course T212 Electronics: sensing, logic and actuation...An introduction to electronics: Learning outcomes - After studying this course, you should be able to: recognise a...

...work out what the power should be, you simply count how many times you moved the decimal point. The composition of the gut microbiome changes throughout our lives. During the first 3 years of life our gut microbiome is formed and affected by various factors, such as breastfeeding, weaning and bacteria found in the local environment. As we age, two groups of bacterial...