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Sarnased õppematerjalid

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Formaldehyde

Formaldehyde Formaldehyde is a colorless, flammable gas at room temperature. It has a pungent, distinct odor and may cause a burning sensation to the eyes, nose, and lungs at high concentrations. Formaldehyde is also known as methanal, methylene oxide, oxymethylene, methylaldehyde, and oxomethane. Formaldehyde can react with many other chemicals, and it will break down into methanol (wood alcohol) and carbon monoxide at very high temperatures. Formaldehyde is naturally produced in very small amounts in our bodies as a part of our normal, everyday metabolism and causes us no harm. It can also be found in the air that we breathe at home and at work, in the food we eat, and in some products that we put on our skin. A major source of formaldehyde that we breathe every day is found in smog in the lower atmosphere. Automobile exhaust from cars without catalytic converters or those using oxygenated gasoline also contain formaldehyde. At home, forma

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Dioxins and furans in the atmosphere

D i ox i n s a n d f u r a n s i n t h e atmosphere. Their impact on humans and nature. Emission sources  What are dioxines and furans? The term Dioxin is commonly used to refer to a family of toxic chemicals that all share a similar chemical structure and a common mechanism of toxic action. Most dioxins and furans are not manmade or produced intentionally, but are created when other chemicals or products are made. This family includes: seven of the polychlorinated dibenzo dioxins (PCDDs), ten of the polychlorinated dibenzo furans (PCDFs) and twelve of the polychlorinated biphenyls (PCBs). · PCDD · 2,3,7,8TCDD · PCDF · PCB · PCDDs and PCDFs are not commercial chemical products but are trace level unintentional byproducts of most forms of combustion and several industrial chemical processes. Of all of the dioxins and furans, one, 2,3,7,8tetrachloropdibenzo dioxin (2,3,7,8 TCD

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Harjutus 2

TMT 0050 Harjutustöö nr 2 Töökeskkond ja ergonoomika Üliõpilase eesnimi ja prk nimi Aprahimov Rühma nr. XXXX11 Õppejõud Virve Siirak Ülesanne: Leida Euroopa Liidu töötajate kaitset (protection of workers) käsitlevates direktiivides iga direktiivi kohta tööandja (employer) kohustused: Ülesanne: lahendamiseks kasutada linki:http://europe.osha.eu.int/legislation/ Vaadata üle direktiivid A. 1 ­ 1.2.15. Mitte tõlkida. Kuna infot on palju, siis kirjutada kõige olulisem. · Töö vormistada ja saata mulle elektrooniliselt [email protected] · Töö lõppu lisada oma isiklik arvamus tööandja osast töötajate kaitsel Euroopa Liidu direktiivides Direktiivi number Tööandja kohustused ja nimetus Council Directive 1. Employers shall be obliged to perform an analysis of workstations in 90/270/EEC order to evaluate the safety and health conditions to which they give rise for their workers, particularly as

Ergonoomika

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Caffeine

1 Caffeine 2 3 Caffeine (C8H10N4O2) is the common name for trimethylxanthine (systematic name is 1,3,7- 4 trimethylxanthine or 3,7-dihydro-1,3,7-trimethyl-1H-purine-2,6-dione). The chemical is also 5 known as coffeine, theine, mateine, guaranine, or methyltheobromine. Caffeine is naturally 6 produced by several plants, including coffee beans, guarana, yerba maté, cacao beans, and tea. 7 For the plants, caffeine acts as a natural pesticide. It paralyzes and kills insects that attempt to 8 feed on the plants. The molecule was first isolated by the German chemist Friedrich Ferdinand 9 Runge in 1819. 10 When purified, caffeine is an intensely bitter white powder. It is added to colas and other soft 11 drinks to impart a pleasing bitter note. However, caffeine is also an addictive stimulant. In 12 humans, it stimulates the central nervous system, heart rate, and respiration, has psychotropic 13 (mood altering) p

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Alcohol

ALCOHOL Alcohol is a widely used substance for both science and in technology. Its name comes from an Arabic word al-kuhl meaning " a powder for painting the eyes". The term was later applied to all compounds that contain alcoholic spirits. To most people alcohol is considerd a downer that reduces activity in the nervous system. Some of the things alcohol effects you is, the alcohol intoxicated person exhibits lose muscle tone, loss of fine moter coordination,and often has a staggering "drunken" gait. The eyes may appear somewhat "glossy" and pupils may be slow to respond to stimulus. At high doses pupils may become constricted. At intoxing doses, alcohol can decrease heart rate, lower blood pressure and respiration rate, and result in decreased reflex and slower reaction times. Skin may be cool to touch but to the user may feel warm or normal, profuse sweating may accompany alcohol use. Loose muscle tone, lose of fine motor coordination,odor of alcohol on the breath,a

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ENVIRONMENTAL PROBLEMS

ENVIRONMENTAL PROBLEMS Our environment is constantly changing. However, as our environment changes, so does the need to become increasingly aware of the problems that surround it. With a massive influx of natural disasters people need to be aware of what types of environmental problems our planet is facing. Current environmental problems make us vulnerable to disasters and tragedies, now and in the future. Unless we address the various issues seriously we are surely doomed for disaster. Current environmental problems require urgent attention. 1. Pollution: Pollution of air, water and soil require millions of years to recoup. Industry and motor vehicle exhaust are the number one pollutants. Heavy metals, nitrates and plastic are toxins responsible for pollution. While water pollution is caused by oil spill, acid rain, urban runoff; air pollution is caused by various gases and toxins released by industries and factories and burning of fossil

Akadeemiline inglise keel

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Euroopa Liidu direktiivid

Gruppitöö Valeria Prostjakova 134750 HAAB12 Euroopa Liidu direktiivid Tööandja kohustused Directive 89/391 - OSH "Framework Directive" Vabariigi Valitsuse määrus; Official Journal: Elektrooniline Riigi Teataja, Publication date: 29/12/2003; Reference: (MNE(2003)55377) The employer shall: evaluate all the risks to the safety and health of workers, inter alia in the choice of work equipment, the chemical substances or preparations used, and the fitting-out of work places implement measures which assure an improvement in the level of protection afforded to workers and are integrated into all the activities of the undertaking and/or establishment at all hi

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Addiction and drugs

school Addiction and drugs summary name  form year Table of contents Smoking...............................................................................................page 3 Narcotics............................................................................................................................page 4 1. Marijuana..............................................................................page 4 2. Ecstasy.................................................................................page 5 3. Heroin.................................................................................p

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