A diamond ring can signal joy, love, commitment and, maybe these days, environmental awareness. The global demand for ethically-sourced and environmentally-sound jewellery is steadily growing and big names, from the world-famous Tiffany brand to the massive Asia-based Chow Tai Fook group, have developed deep sustainable jewellery policies.
Tebello Nyokong, a South African chemist, is developing nanomaterials containing photosensitive dyes for use with lasers to attack certain types of cancerous cells. Photodynamic therapy is a non-invasive, low-toxicity method of causing cell death used to treat a wide range of medical conditions, including several forms of cancer. Dye particles are ingested, injected or applied in …read more