Reflection of Ultra-violet Rays by Snow

Treatment of Diseases of the Skin by Ultra-violet Rays.

ULTRA-VIOLET rays are stated to have a general tonic effect on the sympathetic, and it has been denlonstrated that a general irradiation produces an increase of the calcium and phosphorus ions in the blood. Growing rats subjected to daily irradiation by the mercury-vapour lamp increase in weight, and their total calcium content goes up considerably in excess of the controls. It would appear tha...

Inactivation of Bacteria by Ultra-violet Radiation

Radiation from the sun has different effects upon living organisms. It has been found, for instance, that ultra-violet rays of a certain wavelength present in the radiation from the sun stop the multiplication of bacteria and other micro-organisms. Good use can be made of this, without having to depend upon sunlight, by employing a low-pressure, mercury-vapour lamp emitting rays which have a sp...

The Use of Ultra-Violet Rays in the Sterilization of Water

Evaluating sanitization of toothbrushes using ultra violet rays and 0.2% chlorhexidine solution: A comparative clinical study

BACKGROUND Toothbrushes may play a significant role in plaque control. Toothbrushes should be correctly stored, disinfected and changed at regular intervals. OBJECTIVE The purpose of this study was to evaluate the efficacy of 0.2% chlorhexidine (CHX) gluconate solution and ultra violet (UV) toothbrush-sanitizer for toothbrush disinfection. MATERIALS AND METHODS Fresh tooth brushes were dist...

Sterilization of intra-ocular acrylic lens prostheses with ultra-violet rays.