Enviromental health

The Origin of the Parasol? Long after Rome fell, Europe had a system where lords ruled over people. But, back in Rome's time, they closed places that supplied water and public baths, so people didn't keep clean well. A lot of people lived close together in small castles or towns run by a lord, which made it easy for sickness to spread. Did you know that the parasol we use today has an interestin..

Envirometal health 2024. 3. 25. 11:15

Health effects of nicotine ■ Acute Effects Inhaling aerosols or fumes containing nicotine during regular handling can lead to severe toxic effects, and even a small amount absorbed into the lungs can be deadly. Long-term exposure to nicotine vapors, smoke, or aerosols can cause difficulty breathing and sometimes lead to symptoms like headaches or chest pain (1). Skin contact with nicotine can al..

Envirometal health 2024. 3. 9. 20:20

Biological properties and mechanisms of nicotine ■ Biological properties Nicotine, found in cigarettes, is the main substance responsible for addiction, causing cravings and withdrawal symptoms in both humans and animals. It shares many similarities in molecular structure, brain anatomy, and pharmacological effects with other addictive drugs, particularly those that improve cognitive function. N..

Envirometal health 2024. 3. 9. 15:14

Health Effects of Aluminum and Its Compounds ■ Properties Aluminum is a lightweight, silver-white metal and is the most abundant metal element in the Earth's crust. It is highly reactive and is not found in its pure metallic form in nature. Instead, it is typically found combined with other elements, most commonly oxygen, silicon, and fluorine, in various natural sources such as soils, minerals ..

Envirometal health 2024. 3. 9. 09:07

Polychlorinated Biphenyls, PCBs Polychlorinated biphenyls (PCBs) are aromatic compounds with 1 to 10 chlorine atoms attached to a biphenyl structure (two benzene rings connected, C6H5-C6H5). They have not been identified as naturally occurring and are produced synthetically, combining multiple homologues to create a mixture. Commercial production of PCBs began in the United States in the 1920s, ..

Envirometal health 2024. 3. 9. 05:01

Health Effects of Nickel Nickel and its comfounds are classified as Group 1 substances (carcinogenic to humans) by IARC, the International Agency for Research on Cancer. Globally Harmonized System of Classification & Labeling of Chemicals H317 May cause an allergic skin reaction. H351 Suspected of causing cancer H372: Causes damage to organs (respiratory system, skin) through prolonged or repeat..

Envirometal health 2024. 3. 8. 21:39

Environmental Health: Health Effects of chromium Ⅵ and Its Compounds ■ Chromium Ⅵ is a substance recognized by the International Agency for Research on Cancer (IARC) as carcinogenic to humans. It's classified as Group 1. ■ Globally Harmonized System of Classification & Labeling of Chemicals ■ Properties Chromium is a gray-white metal that exists in the natural environment and in the bodies of pl..

Envirometal health 2024. 3. 8. 19:26

Current National Ambient Air Quality Standards (NAAQS) Table Pollutant [links to historical tables of NAAQS reviews] Primary/Secondary Averaging Time Level Form Carbon Monoxide (CO) primary 8 hours 9 ppm Not to be exceeded more than once per year 1 hour 35 ppm Lead (Pb) primary and Rolling 3 month average 0.15 μg/m3 Not to be exceeded secondary Nitrogen Dioxide (NO2) primary 1 hour 100 ppb 98th ..

Envirometal health 2024. 3. 8. 17:03