PDF-Ultraviolet Radiation Guide

Published by Navy Environmental Health Center 2510 Walmer Avenue Norfolk Virginia 235132617 April 1992 ULTRAVIOLET RADIATION INTRODUCTION This chapter may serve as a guide to industrial hy. Claire Cramer. IACHEC Meeting. 25 March, 2013. Who am I and why am I here?. Outline . Introduction/Background Material. Flux/Detector Response . Calibrations. Spectroscopy and Detector Development. What is NIST?. Screens. ‘How it works?’. Cathode Ray Tubes. Output devices. Cathode Ray Tubes. Television screens used to use a technology called, cathode ray tubes (CRT). An electron gun emitted electrons inside a glass tube onto phosphor atoms at the end of the glass tube, causing the phosphor atoms to light up. The electron gun scanned the screen many times per second, producing an image. . ULTRAVIOLET RADIATION SPECTRUM. UVA (Longwave Radiation). Range 320-400 nm. Erythrogenic activity is weak, however penetrates dermis. Responsible for development of slow. natural tan. Most drug-induced photosensitivity rxn occurs . 14-11. Ultraviolet and visible light give rise to electronic excitations.. Spectroscopy of organic molecules is possible because the absorption of radiation is restricted to quanta having energies corresponding to specific molecular excitations:. Word within a word. Demi. (half). demigod: half human, half god. Perseus and Hercules were both well-known demigods.. Retro (backward). retroactive: going backward and covering the past as well as the future. Aziz AlSa’ad-Nasser Alabduljaleel-Abdulkareem AbuTaleb-Aziz AlOthman . 1.3 Vocabulary . Ultraviolet radiation:. rays of light that cannot be seen and that are a little bit shorter than the rays of violet light. transmitted. absorbed. reflected. 1. transmission. Radiation passes through atmosphere unimpeded.. Shortwave and longwave “windows” . 2. absorption. Energy is transferred to absorber; absorber emits energy. 754 Objective: Excessive reactive oxygen species (ROS) often trigger the activation of elastase to degrade the elastin, an extracellular matrix (ECM) protein that provides resilience and elasticity of What are they? . exposure … contamination. Are they the same?. Radioactivity. Spontaneous emission of radiation from the nucleus of an unstable isotope. Disintegration Decay. Demonstrate Decontamination. hungry pumping system. This chapter describes an unusual i , indoor dust [Lagesson, et al., 2000a], and proposed as a means for functional group analysis [Lagesson, et al., 2000b]. Experimental A b radiaton. , through different types of filters. . UV & . Sunblock. Measuring and comparing the level of ultraviolet radiation, through different types of filters.. Objective. The purpose of this activity is to study the level of ultraviolet radiation resulting from the intervention of a sunlight beam through different types of filters, creating a hypothesis and proceeding to test it using the . Sunscreen. Procedure.  . Buy . a package of UV beads that change color. . 2. You can use a pipe cleaner to make a bracelet, if you wish. . 3. The beads are still white on the inside. . 4. Check the effectiveness of your sunscreen by covering some of the pearls and then placing them in the sun. If they change color, you can add a little more sunscreen. . Radiation is the emission of energy in the form of waves or particles. Radiation that is so powerful that it can remove electrons from atoms is called ionizing.. Examples of types of ionizing radiation are x-rays from medical machines and gamma rays from radioactive substances. . •. Radiation biology . is the study of the action of ionizing radiation on living organisms . •The action is very complex, involving physics, chemistry, and biology . –Different types of ionizing radiation .