How does UV disinfect water. UV light is a naturally occurring component of solar radiation. It falls in the region between visible light and X-Rays in the electromagnetic spectrum.Generally, UV light is considered as falling between the wavelengths 100nm â 400nm, however UV can be categorized even further into separate regions.V light damages the DNA in bacteria, viruses, moulds and some protozoa, leaving them unable to perform cellular functions and multiply. UV is particularly highly effective against Cryptosporidium and Giardia â organisms resistant to chlorine that are a major risk to human health.
Intro: Dulce de Leche. Dulce de leche is a delicious caramel-like candy made from milk and sugar that's popular in many South American countries. It's called confiture de lait in French, and ...
Recipe for Traditional Alfajores. This is the standard alfajor cookie, filled with dulce de leche and sprinkled with powdered sugar. Most people fill these cookies with store-bought dulce de leche to save time, but when made with homemade dulce de leche they are truly out of this world.ecipe for Alfajores de Miel. This Peruvian variation on the traditional alfajor cookie is filled with an anise-flavored syrup in place of the dulce de leche. The result is a slighly sticky but very delicious cookie that keeps well. The cookies are taste a bit like the Peruvian treat called Turron de Dona DoÃ±a. pepa