After 20 years of development biosensors have been built that are able to measure chemical and biological reactions inside ...

If you’re dealing with acne, you may want to consider adding retinol to your nightly skin care routine. Retinols are vitamin A derivatives and are a subtype of retinoids, which are powerful skin ...

There are a few scientific methods for precisely determining karat gold purity, some destructive (fire assay) and others nondestructive (X-ray fluorescence). Both methods require costly equipment, ...