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...carbon, oxygen and hydrogen. To enable cellular components such as organelles to be viewed, the sections must first be 'stained' to increase contrast. However, unlike light microscopy, which uses coloured stains that absorb light, in TEM, the stains contain heavy metals, such as lead and uranium. These are large atoms that prevent electrons passing straight through the...

...carbon source of V. atypica. Autoinducer secretion is also important for S. gordonii and Porphyromonas gingivalis in the formation of mixed biofilm communities that provide mutual protection...General principles of cellular communication: 1.2 Summary of Section 1 - To survive and adapt, cells need to both sense their environment and communicate with each other. An...

...carbon content within less than one year whilst at the same time having no toxic properties. In our labs, we’re working in partnership with DEFRA and a UK polymer company to undertake a series of biodegradability and ecotoxicology experiments and tests. To do this, we use instruments, such as this respirometer, which measures the breakdown of plastic materials through...

...carbon dioxide...Week 2: Planets, large and small: 6.2 Giant planets - Now take a look at these images of the giant planets. [An image of Jupiter.] Figure 19 Image of Jupiter taken by the Hubble Space Telescope showing the motion of its bands of clouds around the Great Red Spot [An image of Saturn and its rings.] Figure 20 A spectacular image of Saturn and its rings,...