Find thousands of freely licensed digital books, artworks, photos and images of historical library materials and museum objects.
A square with the message "Le SIDA ... a vue d'oeil on voit rien!" [AIDS ... has eyes - we see nothing!] in black marker pen on a squared background; one of a series of posters representing an advertisement for a competition for posters of images against AIDS organised by CRIPS. Lithograph by Noëlle Ciccodicola.
- [between 1990 and 1999]
Human neural stem cells stained for nestin (red). Nestin is a type of intermediate filamant protein that is used as a marker of neural stem cells. The blue dots are the cell nuclei stained with DAPI. Neural stem cells can be made to develop into cells found in the central nervous system; neurons, astrocytes and oligodendrocytes.
- Yirui Sun
Solanum laciniatum Aiton Solanaceae. Kangaroo Apple. Evergreen shrub. Distribution: New Zealand and the east coast of Australia. It contains steroidal saponins that can be converted into steroids, including progesterone, oestrogens, cortisone, prednisolone etc. In 1943, Professor Russell Marker discovered a method of obtaining an unsaturated steroidal saponine, diosogenin, from Mexican yam (Dioscorea mexicana), which can easily and cheaply be converted into steroids, such as prednisone and progesterone, reducing the price of steroid production to a fraction (0.5%) of its former cost. For 20 years drug companies showed little interest, and it was only as a result of Professor Marker forming his own company, and the concerted efforts of several gynaecologists, physiologists and birth-control advocates, that the contraceptive pill was ‘born’ in 1960. Photographed in the Medicinal Garden of the Royal College of Physicians, London.
- Dr Henry Oakeley
Gold nanoparticles, when coated with a cancer antibody, are effective at binding to tumour cells and can be used in the diagnosis and treatment of cancer. When bound to the gold, the cancer cells scatter light, making it very easy to identify the noncancerous cells from the malignant ones.
- Annie Cavanagh
Photoreceptors, illustration. This series, called 'Histograms', consists of small, playful drawings based on histological slides, and are brightly colored, illustrative and cartoon-like. They are scaled to recall the view through a microscope; the view to a slide specimen covered by a thin square glass plate.
- Samantha Krukowski