منابع مشابه
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...
متن کاملUltra-Violet Radiation and Actino-Therapy
This little book, written in a charming literary style, is an exposition of our knowldege of radiation in general and the application to medicine of the rays of that part of the spectrum known as the ultra-violet region. In his foreword Sir Oliver Lodge says it is a book dealing with a comparatively new and highly promising subject by people with medical training, physical knowledge, and extens...
متن کاملPhysical-Mechanical Properties of Nitrodopes Affected by Ultra-Violet Radiation
The FTIR spectroscopy has been employed in this research work to monitor theprocess of nitrodope photodegradation, by measuring surfaces of bands typical of a nitrogroup. Nitric esters are subject to degradation, which is reflected on a quantitative ratio ofthe surfaces of the IR bands that originate from the nitric ester. The obtained results showthat the length of the UV rays' activity on the...
متن کاملThe Absorption of Ultra-violet Radiation by Crystalline Pepsin
Determination of the absorption spectra of pure preparations of Northrop's crystalline pepsin inactivated by irradiation with ultra-violet light shows that the total absorption in the ultra-violet region of the spectrum increases with the degree of inactivation. This increase is especially marked between 2400 and 2750 A.u. The rate of photoinactivation is shown to be sensitive to changes in pH,...
متن کاملThe Denaturation of Egg Albumin by Ultra-violet Radiation
The coagulation of isoelectric egg albumin solutions, on exposure to ultraviolet radiation, involves three distinct processes, (1) the light denaturation of the albumin molecule, (2) a reaction between the light denatured molecule and water which may be similar to heat denaturation but occurs at a lower temperature, and (3), the flocculation of the denatured molecules to form a coagulum. The li...
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ژورنال
عنوان ژورنال: Proceedings of the Royal Society of Medicine
سال: 1917
ISSN: 0035-9157
DOI: 10.1177/003591571701000406