SUNLIGHT AND THE MAGNETIC NEEDLE

Orange and Sunlight: A Recipe for Blisters

synthesis of amido alkylnaphthols using nano-magnetic particles and surfactants

we used dbsa and nano-magnetic for the synthesis of amido alkylnaphtols.

Magnetic Needle Viscometer for Langmuir Monolayers

We have built a magnetic needle viscometer capable of measuring the surface shear viscosity of Langmuir monolayers at constant surface pressure or molecular area. A Langmuir trough with dual symmetrical compression/expansion barriers is positioned between two electromagnetic coils that create a homogeneous magnetic field gradient. The gradient drives a Teflon-encapsulated magnetic needle floati...

The quantum needle of the avian magnetic compass.

Migratory birds have a light-dependent magnetic compass, the mechanism of which is thought to involve radical pairs formed photochemically in cryptochrome proteins in the retina. Theoretical descriptions of this compass have thus far been unable to account for the high precision with which birds are able to detect the direction of the Earth's magnetic field. Here we use coherent spin dynamics s...

Sunlight and Vitamin D

Vitamin D is the sunshine vitamin that has been produced on this earth for more than 500 million years. During exposure to sunlight 7-dehydrocholesterol in the skin absorbs UV B radiation and is converted to previtamin D3 which in turn isomerizes into vitamin D3. Previtamin D3 and vitamin D3 also absorb UV B radiation and are converted into a variety of photoproducts some of which have unique b...