Search

...DNA and antibodies) to their surface. As gold nanoparticles can bear a high drug load, this makes them ideal carriers for multiple therapeutic agents (Figure 1). Delivering drugs to the brain Because of their small size, gold nanoparticles can easily travel into target cells. We can use gold nanoparticles specifically to target cells to treat difficult areas of the body,...

...DNA, etc.) and from different parts of the body, and would be impossible to interpret. So how is an image produced? We start by looking at a real example. Figure 7 shows a typical slice through the sagittal plane which clearly shows the skin, grey and white matter, cerebrospinal fluid and other components of the brain. The smallest detail in this image is a millimetre or...

...DNA of a kiwi fruit! Along the way you’ll learn some key skills that will develop your scientific thinking – like what to look for when designing an experiment, why you should keep a scientific journal and how to report your results. By the end of the collection you will be able to think about how to investigate the world around you and find out how it works. These...

...DNA. An X-ray photograph of DNA is shown in Figure 1b, and Figure 1d shows a model of its structure. In 1962 the determination of the structure of DNA using X-ray diffraction by Maurice Wilkins, Francis Crick and James Watson was rewarded by the Nobel Prize for Medicine. Sadly Rosalind was not named in the Nobel Prize citation, as she died before the award was made, and...

...DNA from fruit or vegetables, observe osmosis in action and bake a potato to destruction! You’ll also investigate how different liquids behave when frozen and how much water an everyday food item contains. As you carry out these experiments you will develop important science-based skills including observation, record-keeping, data analysis and how to control an...

...DNA or RNA, depending on the type of virus), enveloped in a protein coat. They can vary in shape and size, and typically range from 20–300 nanometres (a nanometer is a meter divided by a thousand million) (Figure 1). Viruses can exist outside their host, but they can’t replicate in isolation, don’t have any of the cellular ‘machinery’ of a normal cell, nor any...

...DNA. Electrons pass readily through unstained tissue sections, because the cell components are made up of small atoms such as 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...